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US4795783A
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Organopolysiloxane containing coating compositions
Assignee: PPG Industries Inc
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Filing: 1987-06-19
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Granted: 1989-01-03
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Expires: 2007-06-19
Abstract
Abstract A coating composition contains a blend of (a) from about 5 percent by weight to about 35 percent by weight of a hydroxyl functional vinyl polymer having at least 2 percent by weight of hydroxyl groups based on the total weight of the vinyl polymer; and (b) from about 65 percent by weight to about 95 percent by weight of an organopolysiloxane containing hydrolyzable groups prepared by the partial hydrolysis of a compound or mixture of compounds represented by the structural formula R a SiX.sub.(4-a) wherein: R is hydrogen, alkyl, aryl, alkylaryl, arylalkyl, aryloxyalkyl or haloalkyl; X is halogen, OR 1 , ##STR1## or the monohydroxy or cyclic C 2 to C 3 residue of a 1,2- or 1,3-glycol, wherein: R 1 is C 1 -C 3 alkyl, R 2 is hydrogen or C 1 -C 4 alkyl, R 3 and R 4 independently are hydrogen, C 1 -C 4 alkyl or C 6 -C 8 aryl, R 5 is C 4 -C 7 alkylene, and a is an integer ranging from 1 to 2, the percentage of (a) and (b) being based on the total weight of (a) and (b).
Inventors
- 👤 Robin L. Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:31
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
A coating composition comprising a blend of: (a) from about 5 percent by weight to about 35 percent by weight of a hydroxyl functional vinyl polymer having at least 2 percent by weight of hydroxyl groups based on the total weight of the vinyl polymer; and (b) from about 65 percent by weight to about 95 percent by weight of an organopolysiloxane containing hydrolyzable groups which is prepared by the partial hydrolysis of a compound or mixture of compounds selected form the group consisting of silanes represented by the structural formula R a SiX.sub.(4-a) wherein: R is hydrogen, alkyl, aryl, alkylaryl, arylalkyl, aryloxyalkyl or haloalkyl; X is halogen, OR 1 , ##STR6## or the monohydroxy or cyclic C 2 to C 3 residue of a 1,2- or 1,3-glycol, wherein: R 1 is C 1 -C 3 alkyl, R 2 is hydrogen or C 1 -C 4 alkyl, R 3 and R 4 independently are hydrogen, C 1 -C 4 alkyl or C 6 -C 8 aryl, R 5 is C 4 -C 7 alkylene, and a is an integer ranging from 1 to 2, the percentage of (a) and (b) being based on the total weight of (a) and (b).
Claim 2
Dependent Claim
200 words
A coating composition comprising a blend of: (a) from about 5 percent by weight to about 35 percent by weight of a hydroxyl functional vinyl polymer having at least 2 percent by weight of hydroxyl groups based on the total weight of the vinyl polymer; and (b) from about 65 percent by weight to about 95 percent by weight of an organopolysiloxane containing hydrolyzable groups which is prepared by the partial hydrolysis of a compound or mixture of compounds selected form the group consisting of silanes represented by the structural formula R a SiX.sub.(4-a) wherein: R is hydrogen, alkyl, aryl, alkylaryl, arylalkyl, aryloxyalkyl or haloalkyl; X is halogen, OR 1 , ##STR6## or the monohydroxy or cyclic C 2 to C 3 residue of a 1,2- or 1,3-glycol, wherein: R 1 is C 1 -C 3 alkyl, R 2 is hydrogen or C 1 -C 4 alkyl, R 3 and R 4 independently are hydrogen, C 1 -C 4 alkyl or C 6 -C 8 aryl, R 5 is C 4 -C 7 alkylene, and a is an integer ranging from 1 to 2, the percentage of (a) and (b) being based on the total weight of (a) and (b).
Claim 3
Dependent Claim
55 words
The coating composition of claim 1 wherein the organopolysiloxane is prepared by the partial hydrolysis of a compound of the formula C 6 H 5 Si(OR') 3 or a mixture of compounds of the formula CH 3 Si(OR') 3 and C 6 H 5 Si(OR') 3 wherein R' is C 1 to C 3 alkyl.
Claim 4
Dependent Claim
34 words
The coating composition of claim 1 wherein the organopolysiloxane is prepared by the partial hydrolysis of a compound of the formula CH 3 Si(OR') 3 wherein R' is C 1 to C 3 alkyl.
Claim 5
Dependent Claim
20 words
The coating composition of claim 1 wherein the organopolysiloxane comprises one or more siloxane linkages represented by the formula: ##STR7##
Claim 6
Dependent Claim
47 words
The coating composition of claim 1 wherein the vinyl polymer is an acrylic polymer which is prepared from a vinyl monomer component comprising at least about 20 percent by weight, based on the total weight of the vinyl monomer component, of a hydroxyalkyl acrylate or hydroxyalkyl methacrylate.
Claim 7
Dependent Claim
39 words
The coating composition of claim 5 wherein the vinyl monomer component comprises from about 30 percent to about 40 percent by weight, based on the total weight of the vinyl monomer component, of a hydroxyalkyl acrylate or hydroxyalkyl methacrylate.
Claim 8
Dependent Claim
35 words
The coating composition of claim 1 wherein the vinyl polymer contains from about 2.5 percent by weight to about 15 percent by weight of hydroxyl groups based on the total weight of the vinyl polymer.
Claim 9
Dependent Claim
60 words
The coating composition of claim 1 wherein the amount of component (a) ranges from about 5 percent by weight to about 20 percent by weight and the amount of component (b) ranges from about 80 percent by weight to about 95 percent by weight, the percentages of (a) and (b) being based on the total weight of (a) and (b).
Claim 10
Dependent Claim
15 words
The coating of claim 1 wherein the coating composition additionally comprises an aminoplast crosslinking agent.
Claim 11
Dependent Claim
16 words
The coating composition of claim 9 wherein the aminoplast crosslinking agent is a melamine formaldehyde condensate.
Claim 12
Dependent Claim
10 words
The coating composition of claim 1 additionally comprising a pigment.
References Cited (Backward Citations)
US3451838A
Cited
US3460980A
Cited
US3843390A
Cited
US3868343A
Cited
US3935346A
Cited
US4093673A
Cited
US4043953A
Cited
US4045602A
Cited
US4224211A
Cited
US4172904A
Cited
US4190680A
Cited
US4103065A
Cited
US4146511A
Cited
US4301268A
Cited
US4298632A
Cited
US4243767A
Cited
US4306050A
Cited
US4283387A
Cited
US4284685A
Cited
US4500337A
Cited
US4388375A
Cited
JPS58122972A
Cited
US4613451A
Cited
US4615947A
Cited
US4604443A
Cited
US4684697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |