CN102617827A - Curing agent modified 1,6-hexamethylene diisocyanate biuret (HDI biuret) and preparation method thereof - Google Patents

Curing agent modified 1,6-hexamethylene diisocyanate biuret (HDI biuret) and preparation method thereof Download PDF

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CN102617827A
CN102617827A CN2011100284048A CN201110028404A CN102617827A CN 102617827 A CN102617827 A CN 102617827A CN 2011100284048 A CN2011100284048 A CN 2011100284048A CN 201110028404 A CN201110028404 A CN 201110028404A CN 102617827 A CN102617827 A CN 102617827A
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hdi
biuret
divalent alcohol
curing agent
water
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CN102617827B (en
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周建明
李本林
何绍群
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Xiangyang Jingxin Hui Ming Technology Co ltd
Hubei University of Arts and Science
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Xiangfan Jingxin Huiming Chemical Industry Co Ltd
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Priority to PCT/CN2011/078973 priority patent/WO2012100532A1/en
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C275/00Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C275/46Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylureas
    • C07C275/58Y being a hetero atom
    • C07C275/62Y being a nitrogen atom, e.g. biuret
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
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    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30Low-molecular-weight compounds
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    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
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    • C08G18/00Polymeric products of isocyanates or isothiocyanates
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    • C08G18/00Polymeric products of isocyanates or isothiocyanates
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    • C08G18/62Polymers of compounds having carbon-to-carbon double bonds
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    • C08G18/00Polymeric products of isocyanates or isothiocyanates
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    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
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    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/77Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78Nitrogen
    • C08G18/7806Nitrogen containing -N-C=0 groups
    • C08G18/7818Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
    • C08G18/7831Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing biuret groups
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    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/80Masked polyisocyanates
    • C08G18/8003Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
    • C08G18/8006Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
    • C08G18/8009Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
    • C08G18/8012Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with diols
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes

Abstract

The invention relates to a polyurethane coating and an adhesive curing agent and preparation methods thereof, and concretely relates to curing agent modified HDI biuret and a preparation method thereof. The preparation method mainly solves problems low HDI conversion rate, and energy waste caused by multitime monomer recovery of known methods for preparing HDI biuret through reacting HDI with water. The curing agent of the invention is generated by reacting a dihydric alcohol, water and the HDI in an organic solvent, wherein the molar ratio of the dihydric alcohol to the HDI is 0.05-0.2:1, the molar ratio of water to the residual HDI is 1:3-4, and the weight ratio of the solvent to (reactants of the dihydric alcohol, water and the HDI) is 0-60:40-100. The curing agent modified HDI biuret which has a low viscosity and makes the one-time feeding conversion rate of HDI monomers reach 80-98% is mainly used as a curing agent for automobile and high grade car paints, and boil-resistant laminating adhesives, and has a nonyellowing characteristic at a high temperature under ultraviolet ray.

Description

A kind of curing agent modified 1,6-di-isocyanate biuret and preparation method thereof
Technical field
The present invention relates to a kind of polyurethane coating, adhesive solidification agent and preparation method thereof, is a kind of modification hexamethylene diisocyanate solidifying agent and preparation method thereof specifically.
Background technology
1; Hexamethylene-diisocyanate (HDI) belongs to not flavescence aliphatic diisocyanate; Be the main raw material of high performance polyurethane coating and tackiness agent, be characterized in polyurethane products light, the Heat stability is good processed the yellowing phenomenon can taking place under the uviolizing out of doors; Under the high temperature steaming condition, the chemical reaction that aromatic isocyanate becomes carcinogenic aromatic amine can not take place, be a kind of raw material very important in the vulcabond raw material.But the HDI monomer is bigger because of its volatility, and toxicity is also big during construction, and method in common all is with HDI and H in the world 2O reaction is processed and is applied to other purposes again after HDI biuret or HDI autohemagglutination become the HDI tripolymer.
HDI and H 2It is following that O reacts the reaction formula of processing biuret:
Figure 909435DEST_PATH_IMAGE001
From the structure of HDI biuret (biuret triisocyanate), should be by the reaction of 3 moles of HDI and 1 mole of water and generate.Introduce the method for manufacture of HDI biuret according to relevant urethane books, if, will can not get product by 3: the 1 moles of a large amount of oyster white dopes of meeting generation that feed intake; Increase along with the HDI molar ratio; White depositions (polyureas) reduces gradually, evidence, mol ratio be 6: 1 more suitable.Prior art just lets HDI excessive more than one times when raw material feeds intake, and the monomeric transformation efficiency of HDI is the highest in the reaction does not reach 50% yet, and excessive HDI monomer reclaims with thin-film evaporator, supplies to recycle once more.The production technique of prior art not only efficient is low, and repeatedly reclaims monomer and cause energy dissipation.
Patent documentation Chinese invention patent ublic specification of application CN101475680A is in the method for disclosed spray method synthesizing hexamethylene diisocyanate on July 8 (HDI) biuret in 2009; Its patent No. is 200910003621.4; Having introduced spray method can be evenly dispersed in the material water to reduce the generation of polyureas; The mol ratio of HDI and water is 2~15, does not still solve the low problem of HDI biuret transformation efficiency.
Summary of the invention
The objective of the invention is the monomeric transformation efficiency of HDI to be brought up to 80~98% in order to remedy the deficiency of prior art, and product do not have that white depositions generates curing agent modified 1, the own isocyanic ester biuret of 6-.
Technical solution of the present invention is: at first with divalent alcohol section H DI is carried out modification; To remain HDI and water again by 3~4: 1 mol ratio feeds intake; The circulating reaction technology of taking substep to add water, stepwise reaction is processed modification HDI biuret solidifying agent; Wherein HDI is 1, the abbreviation of the own isocyanic ester biuret of 6-.
The present invention is the activity that changes section H DI with divalent alcohol to the purpose that section H DI carries out modification, and the activity difference in the formation system between the differing mol so that the reaction of follow-up generation biuret can be carried out in order, is avoided polymeric generation.
The circulating reaction technology that substep of the present invention adds water, stepwise reaction has formed the excessive local environment of HDI relative in the system, and the direction that helps reacting towards generating biuret carries out.
The present invention is to be solvent with the organic solvent, generates described two by divalent alcohol, water and HDI reaction
Unit's alcohol is 0.05~0.2: 1 with the mol ratio of HDI; Described water is 1: 3~4 with the mol ratio of residue HDI; The mol ratio of the OH base of the water that promptly feeds intake and the NCO base of HDI is near the structure proportion of biuret triisocyanate, and the weight ratio of the consumption that described solvent load and reactant divalent alcohol, water and HDI add up to is 0~60: 40~100.
The HDI of the present invention transformation efficiency that feeds intake is 80~98%, and no white depositions generates, and product viscosity is low,
Have only 2000~4000 mpa.s (25 ℃).
Preparing method of the present invention, its step is following:
A, in reaction kettle, add HDI and organic solvent, the back that stirs adds the divalent alcohol through dehydration, is warming up to 60 ℃, 60~90 ℃ of reactions 1~6 hour, makes the HDI modifier;
B, be cooled to below 70 ℃, add first part's water, react and be warmed up to 75~100 ℃ of reactions 1~3 hour after 0.5~1.5 hour, be warmed up to 120~140 ℃ again and reacted 1~3 hour; Be cooled to below 70 ℃, add second section water, repeat above-mentioned technological process; Until the water that adds whole meterings; React be warmed up to after 0.5~1.5 hour 75~100 ℃ the reaction 1~3 hour, be warmed up to again 120~140 ℃ the reaction 1~5 hour, at this moment between; The degree of carrying out through the content monitoring reaction that detects NCO to reactant sampling is when the content of NCO tends towards stability, is during near theoretical value reaction end;
C, sampling detect solid content, viscosity, NCO percentage composition and the transformation efficiency of product;
D, the distillation under vacuum with conventional, film evaporation method or solvent extration are extracted solvent and small amount of residual HDI in the product out, are cooled to below 70 ℃ to add organic solvent by the requirement of product solid content, stir, and discharging gets modification HDI biuret solidifying agent.
Divalent alcohol described in the technical solution of the present invention is polyester diol, polyether Glycols, other divalent alcohol or small molecules divalent alcohol, wherein any one or two or more mixtures.
Polyester diol described in the technical solution of the present invention for gather hexanodioic acid-ethylene glycol and 1,2-propylene glycol ester divalent alcohol, gather hexanodioic acid-butanediol ester divalent alcohol, gather sebacic acid-hexanodioic acid-terepthaloyl moietie-the DOPCP divalent alcohol, gather m-phthalic acid-hexanodioic acid-NSC 6366-glycol ether ester divalent alcohol, polycarbonate diol or polycaprolactone divalent alcohol.
Polyether Glycols described in the technical solution of the present invention is polyoxytrimethylene divalent alcohol, polyoxyethylene-propylene divalent alcohol or THF homopolymer divalent alcohol.
Other divalent alcohol described in the technical solution of the present invention is terminal hydroxy group vinyl resin or terminal hydroxy group Synolac.
Small molecules divalent alcohol described in the technical solution of the present invention is the 3-methyl isophthalic acid; 5-pentanediol, NSC 6366, terepthaloyl moietie, glycol ether, cyclohexanediol, methyl propanediol, TCD three ring glycol, 1; Ammediol, 1,4-hydroxymethyl-cyclohexane, 1,4-butyleneglycol, 1; 3-butyleneglycol, 1; 5-pentanediol, diethylammonium pentanediol, 1,2-Ucar 35, glycol ether, erythritan, 1,6-pinakon, neopentyl glycol, butyl ethyl Ucar 35,2; 2-two (4-hydroxy phenyl) propane, hydroxypivalyl hydroxypivalate neopentyl alcohol ester, Resorcinol double hydroxyethyl ether, two (2-hydroxyethyl) ethers of quinhydrones, Resorcinol bis-hydroxypropyl ether, Resorcinol bis-hydroxypropyl ethyl ether, 2,5-ditert-butylhydro quinone, DPG, tripropylene glycol or Rutgers 612.
Water described in the technical solution of the present invention is deionized water or zero(ppm) water.
Organic solvent described in the technical solution of the present invention is the ester class of vinyl acetic monomer, N-BUTYL ACETATE, ethylene glycol ether acetate, propylene glycol monomethyl ether acetate, methylcarbonate, diethyl carbonate, diphenyl carbonate; The ketone of acetone, butanone, cyclohexanone; Toluene, YLENE aromatic hydrocarbons; Dioxane, THF, N, dinethylformamide reaches wherein two or more mixture.
Among preparing method's step a of the present invention; From the symplex structure of HDI, two NCO groups active identical be that the gordian technique of making biuret is started with; At first with divalent alcohol and section H DI reaction earlier; Generate a kind of HDI modifier, this makes in the system between the molecule, the activity between the NCO group has formed difference.The principle of the invention is that follow-up generation biuret reaction has been created condition.
 
In
Figure 514991DEST_PATH_IMAGE002
formula: R is the part-structure beyond the divalent alcohol hydroxyl-removal.
Among preparing method's step b of the present invention, with the water break into portions of metering, adding several times, is for the excessive relatively local environment of HDI in the formation system again, helps reaction and progressively generates biuret.Behind the adding first part water, earlier 75~100 ℃ of reactions of low temperature 1~3 hour, this stage is that HDI and water react, the very fast and HDI reaction generation urea groups vulcabond of elder generation's generation primary amine and carbonic acid gas, primary amine; Be warmed up to 120~140 ℃ of reactions 1~3 hour again, this stage is that urea groups vulcabond and HDI reaction generate biuret.Be cooled to below 70 ℃, add the second part water again, the above-mentioned technological process that circulates until the water that adds whole meterings, is finished above-mentioned technological process.In each stage of above-mentioned reaction; Because each molecular activity exists difference; Gradation adds the technology of water, gradation low temperature and pyroreaction, helps between the differing mol, the reaction between the different activities group can carry out by speed in order, helps the generation of unit molecule biuret; Avoid and reduced the generation of " polyureas ", also promptly do not have white depositions.
Reaction end of the present invention is after adding last water, and NCO content confirms to react whether this end in the sampling detecting reactant, when the content of NCO no longer descends, tends towards stability, is during near the Design Theory value reaction end.Monomeric processing can be quoted relevant patent and the introduction of urethane books to small amount of residual HDI distillation under vacuum, film evaporation method or solvent extration carry out.
The HDI one feeding monomer conversion of product of the present invention is 80~98%, and the height of its transformation efficiency is relevant with the divalent alcohol kind and the consumption of selection, and generalized case can both reach more than 90%.The present invention is comparing below 50% with the one feeding monomer conversion of the HDI biuret of domestic and international prior art manufacturing, has improved nearly one times.
The molecular characterization of product of the present invention is to contain divalent alcohol modification HDI structure and biuret structure simultaneously; Divalent alcohol modification HDI structure is represented in above-mentioned reaction formula (A); Biuret structure characterizes 2245cm-with the biuret structure charateristic avsorption band of the infrared spectrogram of laboratory sample of the present invention 1The place is-the NCO absorption peak 2935cm- 1The place is the absorption peak of methyl and methylene radical, 3305cm- 1The place is-NH-absorption peak 1735cm- 1For-CO-absorption peak, therefore think that product of the present invention has biuret structure.
The present invention also aims to provide a kind of divalent alcohol modification HDI biuret series curing agent product; The introducing of divalent alcohol has changed HDI biuret curing agents; Can design some property by customer requirements; For example increase that solidifying agent is given the snappiness of goods, rigidity, wear resistance, flexibility and with the consistency of resin etc., select different diols can produce a series of modification HDI biuret solidifying agent, satisfy the needs of polyurethane coating, tackiness agent various uses.
Modification HDI biuret solidifying agent of the present invention and supporting Synolac, vinyl resin etc. have good intermiscibility.
The present invention will have manufacturing HDI biuret solidifying agent technology now and reach a new high, and improve production efficiency of products, reduce the monomeric distillation recovered frequency of HDI, increase plant factor, reduced energy consumption and made the HDI product diversification.
Product of the present invention has not flavescence characteristic under ultraviolet ray and the high temperature mainly as the solidifying agent of automobile, high-grade car coating and the compound film adhesive of anti-the boiling.
The present invention compared with prior art has following advantage: one, structure diversification.The present invention has introduced the divalent alcohol structure in HDI biuret molecular structure, make the diversification of modification HDI biuret solidifying agent structure, helps the expansion of end-use.Two, production efficiency is high.The present invention can be enhanced about more than once the production efficiency of prior art, and product does not have the white depositions generation.Three, technology is advanced.Gradation of the present invention adds water, gradation and has changed the process method of traditional manufacturing HDI biuret at the circulating reaction technology of low temperature and pyroreaction, and technology is simple, and plant factor is high.Four, energy consumption is low.Technology of the present invention has reduced the energy consumption that a large amount of residual monomers repeatedly reclaim, recycle.Five, product viscosity is low.Viscosity of the present invention is low, and solid content has reduced consumption of organic solvent up to more than 90%.Six, product index of the present invention (following content is weight percentage) as follows:
(1) outward appearance: colourless to light yellow transparent liquid;
(2) solid content: 40~90%;
(3) NCO content: 16~23.5%, in total solids;
(4) storage period: 1 year.
Description of drawings
Fig. 1 is the infrared spectrogram that laboratory sample of the present invention detects with IR.
Embodiment
Embodiment 1
A, in reaction kettle, add 168 gram HDI and 22 gram N-BUTYL ACETATEs, the back that stirs adds the three ring glycol through 19.6 gram TCD of dehydration, is warming up to 60 ℃, 60~70 ℃ of reactions 1 hour, is raised to 70~80 ℃ of reactions 1 hour again, makes the HDI modifier; B, be cooled to below 70 ℃, add 2.4 gram water for the first time, react and be warmed up to 80~90 ℃ of reactions 1.5 hours after 1 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add for the second time 1.2 gram water, react and be warmed up to 80~90 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add 1.2 gram water for the third time, react and be warmed up to 80~90 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ and reacted 1 hour; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 19.6% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 90%, and viscosity is 2800mpa.s (25 ℃), and NCO content is 19.3%, and transformation efficiency is 96% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 22 gram N-BUTYL ACETATEs below 70 ℃, stir with distillation under vacuum, discharging, 214 gram solid contents are 90% modification HDI biuret solidifying agent.Residual HDI content through detecting this solidifying agent is 0.42%.
Embodiment 2
A, in reaction kettle, add 168 gram HDI and 81 gram N-BUTYL ACETATEs; The back adding that stirs gathers sebacic acid-hexanodioic acid-terepthaloyl moietie-DOPCP divalent alcohol (molecular weight is 1000) through 70 grams of dehydration; Be warming up to 60 ℃; 60~70 ℃ of reactions 1.5 hours, be raised to 70~80 ℃ of reactions 2 hours again, make the HDI modifier; B, be cooled to below 70 ℃, add 2.5 gram water for the first time, react and be warmed up to 75~85 ℃ of reactions 1.5 hours after 1.5 hours, be warmed up to 120~130 ℃ again and reacted 1.5 hours; Be cooled to below 70 ℃, add for the second time 1.3 gram water, react and be warmed up to 75~85 ℃ of reactions 1 hour after 1 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add 0.8 gram water for the third time, react and be warmed up to 75~85 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, the 4th adding 0.56 restrains water, reacts to be warmed up to 75~85 ℃ of reactions 1 hour after 0.5 hour, is warmed up to 120~130 ℃ of reactions 1 hour again; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 13% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 75%, and viscosity is 3100mpa.s (25 ℃), and NCO content is 12.7%, and transformation efficiency is 91% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 50 gram N-BUTYL ACETATEs and 31 gram vinyl acetic monomers below 70 ℃, stir with distillation under vacuum, discharging, 324 gram solid contents are 75% modification HDI biuret solidifying agent.Residual HDI content through detecting this solidifying agent is 0.35%.
Embodiment 3
A, in reaction kettle, add 168 gram HDI and 73 gram N-BUTYL ACETATEs, the back that stirs adds 9.4 grams 1 through dehydration, and the 5-pentanediol is warming up to 60 ℃, 60~70 ℃ of reactions 1 hour, is raised to 70~80 ℃ of reactions 1 hour again; Adding is through 35 gram terminal hydroxy group vinyl resins (molecular weight is 1000) of dehydration again, and 70~80 ℃ of reactions 1 hour, 80~90 ℃ were reacted 1 hour, and made the HDI modifier; B, be cooled to below 70 ℃, add 2.3 gram water for the first time, react and be warmed up to 75~85 ℃ of reactions 1.5 hours after 1 hour, be warmed up to 120~130 ℃ again and reacted 1.5 hours; Be cooled to below 70 ℃, add for the second time 1.1 gram water, react and be warmed up to 75~85 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1.5 hours; Be cooled to below 70 ℃, add 1.1 gram water for the third time, react and be warmed up to 75~85 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ and reacted 1 hour; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 14.5% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 75%, and viscosity is 2100mpa.s (25 ℃), and NCO content is 14.2%, and transformation efficiency is 90% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 50 gram N-BUTYL ACETATEs and 23 gram propylene glycol monomethyl ether acetate below 70 ℃, stir with distillation under vacuum, discharging, 290 gram solid contents are 75% modification HDI biuret solidifying agent.
Embodiment 4
A, in reaction kettle, add 168 gram HDI and 69 gram N-BUTYL ACETATEs; The back adding that stirs restrains two (hydroxyethyl) ethers of Resorcinols through 34.7 of dehydration, is warming up to 60 ℃, reacts 1 hour at 60~70 ℃; Be raised to 70~80 ℃ of reactions 1 hour again, make the HDI modifier; B, be cooled to below 70 ℃, add 2.0 gram water for the first time, react and be warmed up to 80~90 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add for the second time 1.0 gram water, react and be warmed up to 80~90 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add 0.9 gram water for the third time, react and be warmed up to 80~90 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ and reacted 1 hour; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 15.2% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 75%, and viscosity is 1600mpa.s (25 ℃), and NCO content is 15.0%, and transformation efficiency is 94% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 69 gram N-BUTYL ACETATEs below 70 ℃, stir with distillation under vacuum, discharging, 275.5 gram solid contents are 75% modification HDI biuret solidifying agent.
Embodiment 5
A, in reaction kettle, add 168 gram HDI and 84 gram N-BUTYL ACETATEs; The back adding that stirs restrained polytetrahydrofuran diols (molecular weight is 1000) through 80 of dehydration, is warming up to 60 ℃, 60~70 ℃ of reactions 3 hours; Be raised to 70~80 ℃ of reactions 2.5 hours again, make the HDI modifier; B, be cooled to below 70 ℃, add 2.5 gram water for the first time, react and be warmed up to 75~85 ℃ of reactions 2.5 hours after 1.5 hours, be warmed up to 120~130 ℃ again and reacted 2.5 hours; Be cooled to below 70 ℃, add for the second time 1.3 gram water, react and be warmed up to 75~85 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1.5 hours; Be cooled to below 70 ℃, add 1.2 gram water for the third time, react and be warmed up to 75~85 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ and reacted 1 hour; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 12.5% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 75%, and viscosity is 2100mpa.s (25 ℃), and NCO content is 12.2%, and transformation efficiency is 92% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 50 gram N-BUTYL ACETATEs and 34 gram ethylene glycol ether acetates below 70 ℃, stir with distillation under vacuum, discharging, 337 gram solid contents are 75% modification HDI biuret solidifying agent.
Embodiment 6
A, in reaction kettle, add 168 gram HDI and 61 gram N-BUTYL ACETATEs, the back that stirs adds 10.4 gram NSC 6366s through dehydration, is warming up to 60 ℃, 60~70 ℃ of reactions 1 hour, is raised to 70~80 ℃ of reactions 1 hour again, makes the HDI modifier; B, be cooled to below 70 ℃, add 1.8 gram water for the first time, react and be warmed up to 80~90 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add for the second time 0.9 gram water, react and be warmed up to 80~90 ℃ of reactions 1.5 hours after 0.5 hour, be warmed up to 120~130 ℃ again and reacted 1 hour; Be cooled to below 70 ℃, add 0.9 gram water for the third time, react and be warmed up to 80~90 ℃ of reactions 1 hour after 0.5 hour, be warmed up to 120~130 ℃ and reacted 1 hour; Be warmed up to 125~135 ℃ of reactions once more,, whenever detect the NCO percentage composition at a distance from sampling in 0.5 hour in this section period, when being worth 20.7% near Design Theory, the termination reaction of lowering the temperature immediately; C, sampling detect, and the solid content of product is 75%, and viscosity is 3100mpa.s (25 ℃), and NCO content is 20.4%, and transformation efficiency is 80% (in total solids); D, extract N-BUTYL ACETATE and small amount of residual HDI in the product out, be cooled to and add 61 gram N-BUTYL ACETATEs below 70 ℃, stir with distillation under vacuum, discharging, 242 gram solid contents are 75% modification HDI biuret solidifying agent.
Application implementation example 1
Product 30 grams of embodiment 1 and the hydroxyl component of 100 gram phthalic resin coatings mix, and the coating lacquer film properties that makes is following: dryness: 25 ℃, surface drying time 50 minutes is done solid work 12 hours time; Test performance after 3 days: gloss (60 °): >=95%; Hardness: Shao Shi D50; Shock strength: 428N.cm; Sticking power: 1 grade; Snappiness: 1mm.
The method of inspection: gloss is pressed GB9754-88, hardness and is pressed GB1730-79, shock strength and press that GB1732-93, sticking power press GB1720-89, snappiness is pressed the GB1731-79 standard.
Application implementation example 2
Product 40 gram of embodiment 3 and 100 gram Hydroxylated acrylic resin solution mixing, the coating lacquer film properties that makes is following: dryness: 25 ℃, surface drying time 50 minutes, when doing solid work 12 hours; Test performance after 3 days: gloss (60 °): >=95%; Hardness >=Shao Shi D60; Shock strength: 480N.cm; Sticking power: 1 grade; Snappiness: 1mm.
Application implementation example 3
Product 35 grams of embodiment 2 and package compound are mixed with hydroxyl component 100 grams of polyurethane adhesive; Be used for the compound of pure aluminum foil and CPP film; In 50 ℃ solidify 72 hours after; Carry out T type peeling strength test by GB/T 2791-1995 " tackiness agent T peeling strength test method flexible material is to flexible material ", stripping strength is 1030g/15mm, and the laminated film behind cooking test does not find that film has separation phenomenon.
Reference:
1, the Li Shaoxiong of Chemical Industry Press's " polyurethane adhesive ", Liu Yijun write, the 3rd printing in January, 2000 Beijing.
2, coatings industry the 38th volume in October, 2008 the 10th phase " HDI biuret polyurethane curing agent synthetic with the separating of remaining HDI ".
3, Chinese invention patent application number: 200910003621.4, title: the method for spray method synthesizing hexamethylene diisocyanate (HDI) biuret.

Claims (10)

1. a curing agent modified hexamethylene diisocyanate biuret is characterized in that containing divalent alcohol modification HDI structure and biuret structure in this solidifying agent, is to be solvent with the organic solvent, is generated by divalent alcohol, water and HDI reaction;
The mol ratio of described divalent alcohol and HDI is 0.05~0.2: 1, and described water is 1: 3~4 with the mol ratio of residue HDI, and the weight ratio of the consumption that described solvent load and reactant divalent alcohol, water and HDI add up to is 0~60: 40~100; Wherein HDI is the abbreviation of hexamethylene diisocyanate.
2. the preparation method of a kind of curing agent modified hexamethylene diisocyanate according to claim 1 (HDI) biuret, it is characterized in that: preparation process is following:
A, in reaction kettle, add HDI and organic solvent, the back that stirs adds the divalent alcohol through dehydration, is warming up to 60 ℃, 60~90 ℃ of reactions 1~6 hour, makes the HDI modifier;
B, be cooled to below 70 ℃, add first part's water, react and be warmed up to 75~100 ℃ of reactions 1~3 hour after 0.5~1.5 hour, be warmed up to 120~140 ℃ again and reacted 1~3 hour; Be cooled to below 70 ℃, add second section water, repeat above-mentioned technological process; Until the water that adds whole meterings; React be warmed up to after 0.5~1.5 hour 75~100 ℃ the reaction 1~3 hour, be warmed up to again 120~140 ℃ the reaction 1~5 hour, at this moment between; The degree of carrying out through the content monitoring reaction that detects NCO to reactant sampling is when the content of NCO tends towards stability, is during near theoretical value reaction end;
C, sampling detect solid content, viscosity, NCO percentage composition and the transformation efficiency of product;
D, the distillation under vacuum with conventional, film evaporation method or solvent extration are extracted solvent and small amount of residual HDI in the product out, are cooled to below 70 ℃ to add organic solvent by the requirement of product solid content, stir, and discharging gets modification HDI biuret solidifying agent.
3. a kind of curing agent modified hexamethylene diisocyanate biuret according to claim 1 is characterized in that: add divalent alcohol in the described HDI monomer, with divalent alcohol section H DI is carried out modification, generate biuret with the water reaction again.
4. according to claim 1 a kind of curing agent modified 1; The hexamethylene-diisocyanate biuret; It is characterized in that described divalent alcohol is polyester diol, polyether Glycols, other divalent alcohol or small molecules divalent alcohol, wherein any one or two or more mixtures.
5. according to claim 4 a kind of curing agent modified 1; The hexamethylene-diisocyanate biuret, it is characterized in that described polyester diol for gather hexanodioic acid-ethylene glycol and 1,2-propylene glycol ester divalent alcohol, gather hexanodioic acid-butanediol ester divalent alcohol, gather sebacic acid-hexanodioic acid-terepthaloyl moietie-the DOPCP divalent alcohol, gather m-phthalic acid-hexanodioic acid-NSC 6366-glycol ether ester divalent alcohol, polycarbonate diol or polycaprolactone divalent alcohol.
6. a kind of curing agent modified hexamethylene diisocyanate biuret according to claim 4 is characterized in that described polyether glycol is polyoxytrimethylene divalent alcohol, polyoxyethylene-propylene divalent alcohol or THF homopolymer divalent alcohol.
7. a kind of curing agent modified hexamethylene diisocyanate biuret according to claim 4 is characterized in that described other divalent alcohol is terminal hydroxy group vinyl resin or terminal hydroxy group Synolac.
8. according to claim 4 a kind of curing agent modified 1; The hexamethylene-diisocyanate biuret; It is characterized in that described small molecules divalent alcohol is the 3-methyl isophthalic acid, 5-pentanediol, NSC 6366, terepthaloyl moietie, glycol ether, cyclohexanediol, methyl propanediol, TCD three ring glycol, 1, ammediol, 1; 4-hydroxymethyl-cyclohexane, 1; 4-butyleneglycol, 1,3 butylene glycol, 1,5-pentanediol, diethylammonium pentanediol, 1; 2-Ucar 35, glycol ether, erythritan, 1; 6-pinakon, neopentyl glycol, butyl ethyl Ucar 35,2,2-two (4-hydroxy phenyl) propane, hydroxypivalyl hydroxypivalate neopentyl alcohol ester, Resorcinol double hydroxyethyl ether, two (2-hydroxyethyl) ethers of quinhydrones, Resorcinol bis-hydroxypropyl ether, Resorcinol bis-hydroxypropyl ethyl ether, 2,5-ditert-butylhydro quinone, DPG, tripropylene glycol or Rutgers 612.
9. a kind of curing agent modified hexamethylene diisocyanate biuret according to claim 1 is characterized in that described water is deionized water or zero(ppm) water.
10. according to claim 1 a kind of curing agent modified 1; The hexamethylene-diisocyanate biuret is characterized in that described organic solvent is the ester class of vinyl acetic monomer, N-BUTYL ACETATE, ethylene glycol ether acetate, propylene glycol monomethyl ether acetate, methylcarbonate, diethyl carbonate, diphenyl carbonate, the ketone of acetone, butanone, cyclohexanone; Toluene, YLENE aromatic hydrocarbons; Dioxane, THF, N, dinethylformamide reaches wherein two or more mixture.
CN 201110028404 2011-01-27 2011-01-27 Curing agent modified 1,6-hexamethylene diisocyanate biuret (HDI biuret) and preparation method thereof Expired - Fee Related CN102617827B (en)

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