[특허]Controlled release dual walled microcapsules

Controlled release dual walled microcapsules 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61Q-013/00 A61K-008/11 A61K-008/81 A61K-008/84 A61Q-019/10 A61Q-005/02 A61Q-015/00 C11D-017/00 C11B-009/00 A61L-015/46
출원번호	US-0487508 (2017-04-14)
등록번호	US-9999579 (2018-06-19)
발명자 / 주소	Feng, Linsheng Bobnock, Robert Stanley
출원인 / 주소	The Procter & Gamble Company
대리인 / 주소	McBride, James F.
인용정보	피인용 횟수 : 0 인용 특허 : 40

초록 ▼

A method of forming dual melamine/acrylic walled microcapsules having improved physical properties and release control as well as the microcapsules formed by the process wherein the capsule wall is formed by the use of select (meth)acrylate monomers and/or oligomers and/or select self-condensing mel

대표청구항 ▼

1. A method of making a consumer product comprising combining a consumer product ingredient and a microcapsule comprising a dual melamine resin/(meth)acrylate polymer walled microcapsules from a first water phase composition comprising a melamine resin forming composition and a second water phase composition comprising a (meth)acrylate polymer forming composition wherein said microcapsules are made by a method comprising: (i) forming an oil-in-water emulsion wherein the oil phase comprises the core material to be encapsulated and one of the first or second aqueous phase compositions,(ii) subjecting the oil-in-water emulsion to conditions for effecting polymerization of the wall forming material contained in the selected aqueous phase composition,(iii) maintaining the reaction mix under such conditions as will effect the encapsulation of the oil phase in a polymer shell formed of the wall forming composition of the selected aqueous phase composition until the shell wall thickness of the microcapsules is such that monomer of either aqueous phase composition is unable to penetrate the shell wall;(iv) adding the other aqueous phase composition to the reaction mix or isolating the microcapsules so formed and adding them to the other aqueous phase, and subjecting the so formed mixture to such conditions as will effect polymerization of the wall forming material of the subsequently added/other aqueous phase composition, and(v) maintaining the reaction mix under such conditions as will effect deposition and polymerization of the wall forming material of the subsequently added aqueous phase composition until the desired wall thickness is attained. 2. The method of claim 1 wherein the subsequently added aqueous phase composition is not added until all or substantially all of the wall forming material of the aqueous phase of the oil-in-water emulsion has polymerized. 3. The method of claim 1 wherein the other aqueous phase composition is added to the reaction mix in step (iv). 4. The method of claim 1 wherein the microcapsules of the first reaction step are isolated and subsequently added to the other aqueous phase composition. 5. The method of claim 1 wherein the (meth)acrylate polymer forming compositions comprises at least one water soluble or dispersible multifunctional (meth)acrylate monomer or oligomer (a). 6. The method of claim 1 wherein the (meth)acrylate polymer forming compositions comprises at least one water soluble or dispersible multifunctional (meth)acrylate monomer or oligomer (a) and at least one water soluble or dispersible mono- and/or di-functional (meth)acrylate (b). 7. The method of claim 1 wherein the (meth)acrylate polymer forming compositions comprises at least one water soluble or dispersible multifunctional (meth)acrylate monomer or oligomer (a) and at least one water soluble or dispersible simple base (c). 8. The method of claim 1 wherein the (meth)acrylate polymer forming compositions comprises at least one water soluble or dispersible multifunctional (meth)acrylate monomer or oligomer (a), at least one water soluble or dispersible mono- and/or di-functional (meth)acrylate (b), and at least one water soluble or dispersible simple base (c). 9. The method of claim 8 wherein the (meth)acrylate polymer forming compositions comprises an oligomer/prepolymer of any two or more of the components of (a), (b) and (c). 10. The method of claim 1 wherein a polymeric emulsifier is present in the first aqueous phase, the second aqueous phase, or both. 11. The method of claim 1 wherein the melamine resin forming composition forms a melamine-based polyurea, a melamine-formaldehyde resin, a melamine-aldehyde resin, dimethylol melamine urea, methylated dimethylol melamine urea, methylated melamine formaldehyde, methylated methylol melamine, and mixtures of melamine formaldehyde with urea formaldehyde. 12. The method of claim 1 wherein the method produces a shell wall comprising two discrete layers, a melamine resin layer and a (meth)acrylate polymer layer, said shell wall having been formed by forming a microcapsule using either the first aqueous phase or the second aqueous phase, isolating the so formed microcapsules, placing them in the other aqueous phase and then subjecting the mixture to conditions to polymerize the wall forming material of that aqueous phase on the preformed microcapsules. 13. The method of claim 12 wherein the resulting microcapsule has an interface between the two discrete layers comprising polymer chains of each layer intertwined and/or embedded in polymer chains of the other. 14. The method of claim 1 wherein the other aqueous phase composition is added to the reaction mixture. 15. The method of claim 14 wherein the resulting microcapsule has an interface between the two discrete layers comprising polymer chains of each layer intertwined and/or embedded in polymer chains of the other. 16. The method of claim 1 wherein a cross-section of the resultant microcapsule manifests a shell wall transition in composition, its interior surface being wholly comprised of the wall forming material of the first to be reacted of the two aqueous phases, an intermediary section comprising an interpenetrating network and/or copolymer of the wall forming materials of the two aqueous phases and an outer surface comprised of the polymer product of the second of the aqueous phases to be reacted, with or without domains of polymerized wall forming material of the first of the aqueous phases to be reacted. 17. The method of claim 1 wherein the subsequently added aqueous phase composition in step (iv) is not added until the oil phase is completely encapsulated with a thin shell of the wall forming material of the first of the aqueous phases to be reacted. 18. The method of claim 1 wherein the microcapsules of step (iv) are not isolated until the oil phase is completely encapsulated with a thin shell of the wall forming material of the first of the aqueous phases to be reacted.

이 특허에 인용된 특허 (40)

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Gosling Keith (Richmond GB2) Jackson Nigel L. (Otley GB2) Leon Nicholas H. (Isleworth GB2) Mulley Victor J. (Reading GB2) Baldock Michael J. (Isleworth GB2), Antiperspirant activity of basic aluminum compounds.
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Jahns Ekkehard,DEX ; Reck Bernd,DEX, Application of microcapsules as latent heat accumulators.
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Bowman Richard P. (Appleton WI), Capsule manufacture.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Controlled release dual walled microcapsules 원문보기

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Controlled release dual walled microcapsules 원문보기

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