CN105820285A - Vinyl chloride copolymer latex with salt fog resistance - Google Patents
Vinyl chloride copolymer latex with salt fog resistance Download PDFInfo
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- CN105820285A CN105820285A CN201610408613.8A CN201610408613A CN105820285A CN 105820285 A CN105820285 A CN 105820285A CN 201610408613 A CN201610408613 A CN 201610408613A CN 105820285 A CN105820285 A CN 105820285A
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- monomer
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- vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/02—Monomers containing chlorine
- C08F214/04—Monomers containing two carbon atoms
- C08F214/08—Vinylidene chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
Abstract
The invention discloses vinyl chloride copolymer latex with salt fog resistance. The polymeric monomer formula, the emulgator formula, polymerization reaction temperature and time, the charging mode and other factors influencing the polymerization reaction are optimized, so that a polymerization method is optimized. The vinyl chloride copolymer latex prepared through the method has excellent storage stability, and is even in grain size distribution and high in adhesive force, and a product coated with the vinyl chloride copolymer latex has excellent water resistance and salt fog resistance.
Description
Technical field
The present invention relates to a kind of metachloroethylene copolymer latex, particularly relate to the copolymer emulsion of the vinylidene chloride of a kind of salt fog resistance, vinyl chloride, acrylate and acrylamide.
Background technology
Within 1932, DOW chemical company of the U.S. has started the research of vinylidene chloride polymerization, but vinylidene chloride homopolymer softening temperature is sufficiently close to decomposition temperature, and is crystalline polymer.In order to improve softening temperature and the degree of crystallinity of vinylidene chloride homopolymer, in succession obtain the copolymer of classes such as vinyl-chloride-containing, acrylate, acrylonitrile.In the fifties in last century, inclined chlorine copolymer resins and latex all have their an application report, at that time latex be mainly used for dip-coating paper and make coating.
At present, vinylidene chloride copolymer latex coating has the excellent properties such as good wearability, moisture resistance, oil resistant, chemical-resistant resistance etch, barrier and anti-flammability because of it, is widely used in the fields such as packaging for foodstuff, auto industry, the fire-retardant processing of fiber and concrete curing.But the domestic research to aqueous metachloroethylene copolymer latex is less, the product of actual application has not been entered into market, bad mainly due to the stability of emulsion after polymerization, long-term place after the easiest breakdown of emulsion of emulsion, coalescence, the adhesive force of film, salt spray resistance do not reach the index request of coating simultaneously.
US3351991A discloses a kind of barrier based on metachloroethylene copolymer/heat sealability coating, and wherein metachloroethylene copolymer is formed by vinylidene chloride, acrylonitrile, methyl methacrylate and unsaturated fatty acid copolymerization.This coating is used for crystalline polypropylene film coating, to improve the heat sealability of goods, moisture-proof and barrier.
US3736303A discloses a kind of latex based on metachloroethylene copolymer, and this metachloroethylene copolymer is formed by other unsaturated vinyl monomer copolymerization of the vinylidene chloride of 70-95%, the vinyl unsaturated sulfonic acid of 0.1-3.0%, the vinyl unsaturated carboxylic acid of 0-5% and 2-29.9%.This latex paint is used for painting polyethylene or polyethylene base material, modified by chemical copolymerization, to improve the adhesion under high humidity environment.
EP0261337A2 discloses a kind of terpolymer latex, and this copolymer is formed by the acrylic acid copolymer of 80-87.5% vinylidene chloride, the methyl methacrylate of 7-14.5% and 4.5-6.5%.This latex paint is used for painting polypropylene fiber, to improve barrier and the thermostability of goods.
CN101033276A discloses a kind of autodeposition coatings based on vinylidene chloride-acrylate copolymer latex and each method processed.With vinylidene chloride and acrylate as monomer, synthesis vinylidene chloride-acrylate copolymer latex, add dispersible pigment color paste, hydrogen peroxide, iron powder, Fluohydric acid. and deionized water and be configured to autodeposition coatings, alternative electrophoretic paint, for the application of metal base, it is also applied for body of a motor car, vehicle frame and the application of smallclothes metal device.
CN103059192A discloses a kind of polyvinylidene chloride copolymer latex for inner, external wall coating and preparation method thereof and application, this PVDC copolymer latex is by the mix monomer containing a certain amount of vinylidene chloride, vinyl chloride and acrylate, and auxiliary agent, initiator, emulsifying agent containing dodecylbenzene sodium sulfonate and OP-10 or OP-4 prepare through a polymerization.This PVDC latex makes stable system, can place 24 months not breakdown of emulsion, nothing precipitations at 30 DEG C, do not destroyed by calcium ions and magnesium ions, have the feature such as environmental protection, waterproof, moistureproof, anti-flammability with its inner, external wall coating prepared during use under RH70%.
Above patent has been directed to comonomer and has carried out modified polyvinilidene vinyl chloride, but latex still suffers from dehydrochlorination reaction, easily variable color, colour stability is bad, the easy variable color of thin film after coating, foaming, can not keep clear, colorless state for a long time, prior art does not has can solve this problem well.
Summary of the invention
Not enough for prior art, the present invention provides a kind of with vinylidene chloride as main monomer, and vinyl chloride, acrylate and acrylamide monomer carry out the metachloroethylene copolymer latex of the salt fog resistance of modification by copolymerization.
To achieve the above object of the invention, the present invention can use any one technical scheme following:
One aspect of the present invention provides the metachloroethylene copolymer latex of a kind of salt fog resistance, and described copolymer emulsion is made up by emulsion polymerization of the raw material of following parts by weight: mix monomer 100 parts, emulsifying agent 0.5-5 part, initiator 0.05-0.5 part, pH adjusting agent 0.05-2 part, chain-transferring agent 0.05-0.2 part and deionized water 50-400 part；
Described mix monomer consists of the following components in percentage by weight: vinylidene chloride 50-90%, vinyl chloride 5-30%, acrylic ester monomer 1-20% and acrylamide monomers 1-5%；
Described emulsifying agent is amphoteric emulsifier and/or nonionic emulsifier；
Described initiator is azo compound or persulfate；
Described pH adjusting agent is hydrophosphate or bicarbonate；
Described chain-transferring agent is aliphatic mercaptan；
The metachloroethylene copolymer latex of described salt fog resistance prepares as follows:
(1) adding deionized water and emulsifying agent in reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；
(2) in still, pre-dispersed 20-30min is stirred under addition Vinyl Chloride Monomer, part initiator and pH adjusting agent, room temperature；
(3) reactor is warming up to 40-80 DEG C, improves reactor speed of agitator, adds vinylidene chloride monomer and acrylic ester monomer and residue initiator, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；
(4) then drip acrylamide monomers, control reaction temperature 40-80 DEG C；
(5) when polymerization pressure declines 0.1-0.3MPa, adding chain-transferring agent, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex；
Described raw material is made up of the component of following weight portion: mix monomer 100 parts, emulsifying agent 1-3 part, initiator 0.1-0.3 part, pH adjusting agent 0.5-1 part, chain-transferring agent 0.08-0.15 part and deionized water 80-200 part；
Described acrylic ester monomer is selected from one or more in methacrylate, acrylic acid methyl ester., ethyl acrylate, n-butyl acrylate and acrylic acid-2-ethyl caproite.
The present invention affects the factor of polyreaction by aggregation Monomer Formations, emulsifiers formula, polymeric reaction temperature and time, feed way etc., optimize polymerization, the metachloroethylene copolymer latex obtained by the preparation method of the present invention is owing to introducing vinyl chloride, unsaturated fatty acid and acrylamide monomer in polymerization, make whole molecular structure can strengthen the flexibility of molecule segment, the property that resin is excellent can be given, it is widely used in the fields such as packaging, automobile, food service industry, there is preferable market prospect.Compared with prior art, the method have the advantages that
1, carry out copolymerization by vinylidene chloride, vinyl chloride, unsaturated fatty acid and four kinds of monomers of acrylamide, optimize the chain structure of main chain, improve the stability of latex, resistance to water and salt fog resistance；
2, by adjusting, improving emulsifier and coupling, improve the storage stability of latex, uniform particle sizes, adhesion is strong；
3, by optimizing processing step, introduce different monomers at different polymerization stages, be conducive to effectively controlling polymerization rate, the composition of copolymer and the molecular weight of copolymer, form the metachloroethylene copolymer latex that composition is relatively uniform.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described, but does not limit the invention to these detailed description of the invention.One skilled in the art would recognize that all alternatives, improvement project and the equivalents potentially included in present invention encompasses Claims scope.
Embodiment 1
Adding 500g deionized water and emulsifying agent (10g OPEO (X-100)) in 2L reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.2g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improves reactor speed of agitator, adds 347g vinylidene chloride monomer and 50g acrylic acid-2-ethyl caproite base monomer and 0.8g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；Then dropping N hydroxymethyl acrylamide monomer 10g, controls reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Embodiment 2
Adding 500g deionized water and (10g OPEO (X-100)) in 2L reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.2g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improves reactor speed of agitator, adds 325g vinylidene chloride monomer and 76g acrylic acid-2-ethyl caproite base monomer and 0.8g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；Then dropping N hydroxymethyl acrylamide monomer 10g, controls reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Embodiment 3
Adding 500g deionized water and emulsifying agent (10g OPEO (X-100)) in 2L reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.1g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improves reactor speed of agitator, adds 334g vinylidene chloride monomer and 50g acrylic acid-2-ethyl caproite base monomer and 0.9g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；Then dropping N hydroxymethyl acrylamide monomer 24g, controls reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Embodiment 4
500g deionized water and compound emulsifying agent ((5g OPEO (X-100) and 5g alkyl phenol polyethenoxy ether sodium sulfate salt (VA-50)) is added in 2L reactor, starting stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.2g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improves reactor speed of agitator, adds 347g vinylidene chloride monomer and 50g acrylic acid-2-ethyl caproite base monomer and 0.8g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；Then dropping N hydroxymethyl acrylamide monomer 10g, controls reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Comparative example 1
Adding 500g deionized water and emulsifying agent (10g OPEO (X-100)) in 2L reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.1g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improve reactor speed of agitator, add 360g vinylidene chloride monomer and 50g acrylic acid-2-ethyl caproite base monomer and 0.9g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa, control reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Comparative example 2
Adding 500g deionized water and emulsifying agent (10g OPEO (X-100)) in 2L reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；Add in still under 90g Vinyl Chloride Monomer, 0.1g potassium peroxydisulfate and 3g sodium bicarbonate, room temperature and stir pre-dispersed 25min；Reactor is warming up to 60 DEG C, improves reactor speed of agitator, adds 385g vinylidene chloride monomer and 0.9g potassium peroxydisulfate, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；Then dropping N hydroxymethyl acrylamide monomer 24g, controls reaction temperature 60 DEG C；When polymerization pressure declines 0.2MPa, adding n-dodecyl mercaptan 1g, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex.The performance parameter of the vinylidene chloride copolymer latex prepared is as shown in table 1.
Table 1: embodiment 1-4 and the physical index contrast comparing vinylidene chloride latex prepared by 1-2
Knowable to table 1 data, the present invention introduces unsaturated fatty acid on main polymer chain and two kinds of monomers of acrylamide carry out copolymerization, and have employed emulsifiers formula and the polymerization technique of optimization, have adjusted the chain the Nomenclature Composition and Structure of Complexes of main chain, improve surface tension and the viscosity of latex, improve the stability of latex.
Embodiment 5
The latex spreader that embodiment 1-4 and comparative example 1-2 prepare is coated uniformly on the iron plate of degreasing and rust removal, coating thickness is emulsion thick about 120 μm, film forming after 60 DEG C of baking and curing 30min, measures its hardness (GB/T6739-1996), adhesive force (GB/T1720-1979), resistance to water (GB1733-93) and salt fog resistance (GB/T1771-91) according to national standard.
Table 2: vinylidene chloride latex coating performance prepared by embodiment 1-5 compares
Knowable to table 2 data, the present invention introduces unsaturated fatty acid on main polymer chain and two kinds of monomers of acrylamide carry out copolymerization, and have employed emulsifiers formula and the polymerization technique of optimization, the latex prepared possesses excellent film performance, improves resistance to water and salt fog resistance.
Claims (1)
1. the metachloroethylene copolymer latex of a salt fog resistance, it is characterised in that: described copolymer emulsion is made up by emulsion polymerization of the raw material of following parts by weight: mix monomer 100 parts, emulsifying agent 0.5-5 part, initiator 0.05-0.5 part, pH adjusting agent 0.05-2 part, chain-transferring agent 0.05-0.2 part and deionized water 50-400 part；
Described mix monomer consists of the following components in percentage by weight: vinylidene chloride 50-90%, vinyl chloride 5-30%, acrylic ester monomer 1-20% and acrylamide monomers 1-5%；
Described emulsifying agent is amphoteric emulsifier and/or nonionic emulsifier；
Described initiator is azo compound or persulfate；
Described pH adjusting agent is hydrophosphate or bicarbonate；
Described chain-transferring agent is aliphatic mercaptan；
The preparation method of the metachloroethylene copolymer latex of described salt fog resistance prepares as follows:
(1) adding deionized water and emulsifying agent in reactor, start stirring, in using high pure nitrogen displacement system, residual air is less than 30ppm to oxygen content in still；
(2) in still, pre-dispersed 20-30min is stirred under addition Vinyl Chloride Monomer, part initiator and pH adjusting agent, room temperature；
(3) reactor is warming up to 40-80 DEG C, improves reactor speed of agitator, adds vinylidene chloride monomer and acrylic ester monomer and residue initiator, keep reactor reaction pressure set polymerization pressure ± 0.01MPa；
(4) then drip acrylamide monomers, control reaction temperature 40-80 DEG C；
(5) when polymerization pressure declines 0.1-0.3MPa, adding chain-transferring agent, stop stirring, reduce reaction temperature, residual gas in releasing reactor, discharging obtains metachloroethylene copolymer latex；
Described raw material is made up of the component of following weight portion: mix monomer 100 parts, emulsifying agent 1-3 part, initiator 0.1-0.3 part, pH adjusting agent 0.5-1 part, chain-transferring agent 0.08-0.15 part and deionized water 80-200 part；
Described acrylic ester monomer is selected from one or more in methacrylate, acrylic acid methyl ester., ethyl acrylate, n-butyl acrylate and acrylic acid-2-ethyl caproite.
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| CN201610408613.8A CN105820285B (en) | 2014-12-29 | 2014-12-29 | A kind of metachloroethylene copolymer latex of salt fog resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518235A (en) * | 2020-06-29 | 2020-08-11 | 天津城建大学 | Water-based vinylidene chloride copolymer resin and preparation method thereof |
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| US3424706A (en) * | 1966-07-08 | 1969-01-28 | Staley Mfg Co A E | Vinylidene chloride copolymerization in presence of preformed seed latex |
| US4716200A (en) * | 1986-03-06 | 1987-12-29 | The Glidden Company | Acrylic polyester high solids coatings |
| CN101033276A (en) * | 2007-03-27 | 2007-09-12 | 中山大学 | Self-deposition coating based on vinylidene chloride-acrylate copolymer latex and preparing method |
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| CN103342771A (en) * | 2013-07-19 | 2013-10-09 | 海南必凯水性涂料有限公司 | Special PVDC (Polyvinyl Dichloride) latex for lining paper and preparation method of special PVDC latex |
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2014
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| US3297613A (en) * | 1963-02-04 | 1967-01-10 | Dow Chemical Co | Vinylidene chloride-acrylate-amide interpolymer |
| US3424706A (en) * | 1966-07-08 | 1969-01-28 | Staley Mfg Co A E | Vinylidene chloride copolymerization in presence of preformed seed latex |
| US4716200A (en) * | 1986-03-06 | 1987-12-29 | The Glidden Company | Acrylic polyester high solids coatings |
| CN101033276A (en) * | 2007-03-27 | 2007-09-12 | 中山大学 | Self-deposition coating based on vinylidene chloride-acrylate copolymer latex and preparing method |
| CN101311196A (en) * | 2007-05-24 | 2008-11-26 | 昭和高分子株式会社 | Method for preparing ethylene-vinyl esters copolymer water-soluble emulsion and ethylene-vinyl ester copolymer water-soluble emulsion |
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| CN111518235A (en) * | 2020-06-29 | 2020-08-11 | 天津城建大学 | Water-based vinylidene chloride copolymer resin and preparation method thereof |
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