CA2330472A1 - Encapsulated active materials - Google Patents

Encapsulated active materials Download PDF

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Publication number
CA2330472A1
CA2330472A1 CA002330472A CA2330472A CA2330472A1 CA 2330472 A1 CA2330472 A1 CA 2330472A1 CA 002330472 A CA002330472 A CA 002330472A CA 2330472 A CA2330472 A CA 2330472A CA 2330472 A1 CA2330472 A1 CA 2330472A1
Authority
CA
Canada
Prior art keywords
active agent
encapsulated
agent
conditions
agents
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002330472A
Other languages
French (fr)
Other versions
CA2330472C (en
Inventor
Dwight K. Hoffman
Steven P. Bitler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2330472A1 publication Critical patent/CA2330472A1/en
Application granted granted Critical
Publication of CA2330472C publication Critical patent/CA2330472C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02Making microcapsules or microballoons
    • B01J13/04Making microcapsules or microballoons by physical processes, e.g. drying, spraying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02Making microcapsules or microballoons
    • B01J13/20After-treatment of capsule walls, e.g. hardening
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02Making microcapsules or microballoons
    • B01J13/20After-treatment of capsule walls, e.g. hardening
    • B01J13/206Hardening; drying
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984Microcapsule with fluid core [includes liposome]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984Microcapsule with fluid core [includes liposome]
    • Y10T428/2985Solid-walled microcapsule from synthetic polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984Microcapsule with fluid core [includes liposome]
    • Y10T428/2985Solid-walled microcapsule from synthetic polymer
    • Y10T428/2987Addition polymer from unsaturated monomers only
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2989Microcapsule with solid core [includes liposome]

Abstract

The invention is an encapsulated active agent comprising an active agent encapsulated in a crystallizable or thermoplastic polymer wherein the particle size of the encapsulated active agent is 3,000 microns or less wherein the active agent is not significantly extractable from the particles under ambient conditions. In another embodiment the invention is a process for preparing an encapsulated agent which comprises: a) contacting an active agent with a crystallizable or thermoplastic polymer wherein the polymer is molten and the active agent is not volatile under the contacting conditions; b) forming particles of 3000 microns or less; and c) exposing the particles to conditions such that the portion of the particle at and near the surface undergoes rapid solidification. The encapsulated active agents of the invention do not require washing in order for them to be stable in curable compositions.
These encapsulated active agents can be designed to release the active agent at a desired temperature. The encapsulated agents of the invention demonstrate excellent stability at ambient temperatures and exhibit relatively rapid reactivity upon release of the active agent.
Furthermore, the presence of the encapsulating agent does not result in deterioration of adhesive or elastomer properties of a cured composition after preparation.
CA002330472A 1998-04-27 1999-04-27 Encapsulated active materials Expired - Fee Related CA2330472C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US8312798P 1998-04-27 1998-04-27
US60/083,127 1998-04-27
PCT/US1999/009105 WO1999055454A1 (en) 1998-04-27 1999-04-27 Encapsulated active materials

Publications (2)

Publication Number Publication Date
CA2330472A1 true CA2330472A1 (en) 1999-11-04
CA2330472C CA2330472C (en) 2007-09-04

Family

ID=22176365

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002330472A Expired - Fee Related CA2330472C (en) 1998-04-27 1999-04-27 Encapsulated active materials

Country Status (12)

Country Link
US (1) US6224793B1 (en)
EP (1) EP1077763B1 (en)
JP (2) JP2002513045A (en)
KR (1) KR100577629B1 (en)
CN (1) CN1207090C (en)
AT (1) ATE259257T1 (en)
AU (1) AU3666799A (en)
BR (1) BR9910337B1 (en)
CA (1) CA2330472C (en)
DE (1) DE69914739T2 (en)
ES (1) ES2212552T3 (en)
WO (1) WO1999055454A1 (en)

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Also Published As

Publication number Publication date
EP1077763A1 (en) 2001-02-28
DE69914739T2 (en) 2004-09-30
US6224793B1 (en) 2001-05-01
BR9910337A (en) 2001-01-09
CN1298321A (en) 2001-06-06
JP2002513045A (en) 2002-05-08
ATE259257T1 (en) 2004-02-15
ES2212552T3 (en) 2004-07-16
CN1207090C (en) 2005-06-22
EP1077763B1 (en) 2004-02-11
KR20010043104A (en) 2001-05-25
CA2330472C (en) 2007-09-04
AU3666799A (en) 1999-11-16
WO1999055454A1 (en) 1999-11-04
JP2011072999A (en) 2011-04-14
KR100577629B1 (en) 2006-05-10
BR9910337B1 (en) 2010-08-24
JP5351131B2 (en) 2013-11-27
DE69914739D1 (en) 2004-03-18

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