EP0275051A2
Expired / Lapsed
EP
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Acrylic modified silicone resins
Assignee: Akzo Nobel Paints LLC
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Filing: 1988-01-08
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Granted: —
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Expires: 2008-01-08
Abstract
Abstract The invention pertains to modified silicone polymers particularly useful in protective coatings including powder coatings. The polymeric composition is produced by in-situ copolymerization of ethylenic monomers, including acrylic and hydroxylated monomers or glycidyl monomers, in the presence of silicone resin.
Inventors
- 👤 James T.K. Woo
- 👤 Richard M. Marcinko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/08; C09D151/085; C08; C08F; C08F283/00; C08F283/12; C08F283/122
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
An acrylic-silicone polymeric composition useful as a polymeric binder in a protective surface coating, the polymeric composition comprising: an in-situ formed polymeric mixture comprising on a weight basis between 30% and 90% acrylic copolymer and the balance being silicone resin, where said silicone resin has a number average molecular weight between 500 and 8000 and having an average of two or more silanol and/or methyl silane groups per silicone molecule, and where said acrylic copolymer is a copolymer of copolymerized ethylenically unsaturated monomers comprising by weight between 30% and 95% acrylic monomer and other ethylenically unsaturated monomers including (a) between 1% and 50% hydroxylated monomer or (b) between 1% and 50% glycidyl monomer, where the polymeric mixture is produced by copolymerizing said ethylenically unsaturated monomers in the presence of said silicone resin.
Claim 2
Dependent Claim
132 words
An acrylic-silicone polymeric composition useful as a polymeric binder in a protective surface coating, the polymeric composition comprising: an in-situ formed polymeric mixture comprising on a weight basis between 30% and 90% acrylic copolymer and the balance being silicone resin, where said silicone resin has a number average molecular weight between 500 and 8000 and having an average of two or more silanol and/or methyl silane groups per silicone molecule, and where said acrylic copolymer is a copolymer of copolymerized ethylenically unsaturated monomers comprising by weight between 30% and 95% acrylic monomer and other ethylenically unsaturated monomers including (a) between 1% and 50% hydroxylated monomer or (b) between 1% and 50% glycidyl monomer, where the polymeric mixture is produced by copolymerizing said ethylenically unsaturated monomers in the presence of said silicone resin.
Claim 3
Dependent Claim
18 words
A composition according to claim 1, where the acrylic copolymer contains between 1% and 50% copolymerized hydroxylated monomer.
Claim 4
Dependent Claim
22 words
A composition according to claim 2, wherein the silicone resin contains on the average two or more silanol groups per silicone molecule.
Claim 5
Dependent Claim
23 words
A composition according to claim 2, wherein the silicone resin contains on the average two or more methoxyl silane groups per silicone molecule.
Claim 6
Dependent Claim
22 words
A composition according to any one of the preceding claims, where the acrylic copolymer contains between 1% and 50% copolymerized glycidyl monomer.
Claim 7
Dependent Claim
89 words
A process for producing acrylic modified silicone resin, the process steps comprising: providing a silicone resin having a number average molecular weight above 500 and an average of mor than one silanol and/or methoxyl silane groups per silicone molecule; and copolymerizing ethylenically unsaturated monomers in the presence of said silicone resin where said monomers comprise by weight based on the total weight of monomers copolymerized, between 30% and 95% acrylic monomer, and between 1% and 50% hydroxyl monomer or glycidyl monomer, and the balance being other ethylenically unsaturated monomers.
Claim 8
Dependent Claim
89 words
A process for producing acrylic modified silicone resin, the process steps comprising: providing a silicone resin having a number average molecular weight above 500 and an average of mor than one silanol and/or methoxyl silane groups per silicone molecule; and copolymerizing ethylenically unsaturated monomers in the presence of said silicone resin where said monomers comprise by weight based on the total weight of monomers copolymerized, between 30% and 95% acrylic monomer, and between 1% and 50% hydroxyl monomer or glycidyl monomer, and the balance being other ethylenically unsaturated monomers.
Claim 9
Dependent Claim
19 words
A process according to claim 6, wherein the silicone resin contains two or more silanol groups per silicone molecule.
Claim 10
Dependent Claim
24 words
A process according to either of claims 6 and 7, wherein the silicone resin contains two or more methoxyl silane groups per silicone molecule.
Claim 11
Dependent Claim
19 words
A process according to claim 8, wherein the silicone resin contains a mixture of silanol and methoxyl silane groups.
Claim 12
Dependent Claim
33 words
A process according to any one of claims 6-9, wherein the silicone resin is dispersed into an organic solvent and the monomers are in-situ copolymerized with the silicone resin dispersed in the solvent.
Claim 13
Dependent Claim
20 words
A process according to any one of claims 6-10, wherein the ethylenic monomers contain between 1% and 50% hydroxyl monomer.
Claim 14
Dependent Claim
20 words
A process according to any one of claims 6-11, wherein the ethylenic monomers contain between 1% and 8% glycidyl monomers.
Claim 15
Dependent Claim
26 words
A process according to claim 12, wherein between 0.1% and 50% organic diacid is added to the polymeric mixture based on the weight of polymeric solids.
References Cited (Backward Citations)
No citation records indexed.
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