US5214085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion-resistant coating compositions with improved weatherability
Assignee: General Electric Co
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Filing: 1992-02-03
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Granted: 1993-05-25
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Expires: 2012-02-03
Abstract
Abstract Non-gelling, radiation curable liquid coating compositions comprise at least one acrylic ester, preferably a mixture of a silyl acrylate and at least one polyfunctional acrylate; silica, preferably having an average particle size in the range of about 15-30 nm.; an initiator for ultraviolet radiation-induced curing and a hindered piperidyl ester such as bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate. The compositions also preferably contain an ultraviolet stabilizer, typically a benzophenone or benzotriazole. When employed as coatings for resinous (especially polycarbonate) articles and cured, said compositions provide abrasion resistance and weatherability.
Inventors
- 👤 Gautam A. Patel
- 👤 Martin A. Trapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:52
CPC Classifications
C; C09; C09D; C09D4/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
A non-gelling liquid coating composition comprising (A) at least one acrylic monomer, (B) silica, (C) at least one initiator for ultraviolet radiation-induced curing of said composition, and (D) an amount effective to inhibit ultraviolet radiation-induced degradation of said composition, or the curing product thereof, of at least one hindered piperidyl ester of the formula ##STR5## wherein R 1 is C 4-12 alkyl, R 2 is C 1-4 primary alkyl and R 3 is C 4-12 alkylene.
Claim 2
Dependent Claim
76 words
A non-gelling liquid coating composition comprising (A) at least one acrylic monomer, (B) silica, (C) at least one initiator for ultraviolet radiation-induced curing of said composition, and (D) an amount effective to inhibit ultraviolet radiation-induced degradation of said composition, or the curing product thereof, of at least one hindered piperidyl ester of the formula ##STR5## wherein R 1 is C 4-12 alkyl, R 2 is C 1-4 primary alkyl and R 3 is C 4-12 alkylene.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 wherein reagent A comprises a silyl acrylate and at least one polyfunctional acrylate.
Claim 4
Dependent Claim
21 words
A composition according to claim 2 wherein reagent B has an average particle size in the range of about 15-30 nm.
Claim 5
Dependent Claim
30 words
A composition according to claim 3 wherein reagent C is selected from combinations of an aromatic ketone and a tertiary amine; aromatic halonium, sulfonium and phosphonium salts; and acylphosphorus compounds.
Claim 6
Dependent Claim
13 words
A composition according to claim 4 wherein reagent C is a triorganobenzoyldiarylphosphine oxide.
Claim 7
Dependent Claim
48 words
A composition according to claim 5 wherein the silyl acrylate has the formula ##STR6## wherein R 4 is hydrogen or methyl, R 5 is C 1-8 alkylene, R 6 is C 1-13 alkyl or aryl, R 7 is C 1-8 alkyl and a is from 0 to 3.
Claim 8
Dependent Claim
12 words
A composition according to claim 6 wherein the silyl acrylate is 3-methacryloyloxypropyltrimethoxysilane.
Claim 9
Dependent Claim
37 words
A composition according to claim 5 wherein the polyfunctional acrylate has the formula ##STR7## wherein R 4 is hydrogen or methyl, R 8 is a polyvalent organic radical and b is an integer from 2 to 6.
Claim 10
Dependent Claim
13 words
A composition according to claim 8 wherein the polyfunctional acrylate is 1,6-hexanediol diacrylate.
Claim 11
Dependent Claim
14 words
A composition according to claim 5 wherein the hindered piperidyl ester is bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate.
Claim 12
Dependent Claim
18 words
A composition according to claim 5 which also contains an ultraviolet stabilizer other than said hindered piperidyl ester.
Claim 13
Dependent Claim
16 words
A composition according to claim 11 wherein the other ultraviolet stabilizer is a benzotriazole or benzophenone.
Claim 14
Dependent Claim
47 words
A composition according to claim 11 which comprises about 5-20% silyl acrylate, about 40-60% polyfunctional acrylate, about 0.5-5.0% of reagent C, about 0.1-4.0% of reagent D and about 1-10% hindered piperidyl ester, all percentages being by weight and based on total reagents A and B excluding water.
Claim 15
Dependent Claim
60 words
A non-gelling liquid coating composition comprising about 5-20% 3-methacryloxypropyltrimethoxysilane, about 40-60% hexanediol diacrylate, silica having an average particle size in the range of about 15-30 nm., about 0.5-5.0% 2,4,6-trimethylbenzoyltriphenylphosphine oxide, about 0.5-5.0% bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate and about 1-10% of at least one benzotriazole as an ultraviolet absorber, all percentages being by weight and based on total 3-methacryloypropyltrimethoxysilane, hexanediol diacrylate and silica.
Claim 16
Dependent Claim
60 words
A non-gelling liquid coating composition comprising about 5-20% 3-methacryloxypropyltrimethoxysilane, about 40-60% hexanediol diacrylate, silica having an average particle size in the range of about 15-30 nm., about 0.5-5.0% 2,4,6-trimethylbenzoyltriphenylphosphine oxide, about 0.5-5.0% bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate and about 1-10% of at least one benzotriazole as an ultraviolet absorber, all percentages being by weight and based on total 3-methacryloypropyltrimethoxysilane, hexanediol diacrylate and silica.
Claim 17
Dependent Claim
10 words
A resinous article coated with the composition of claim 1.
Claim 18
Dependent Claim
10 words
A resinous article coated with the composition of claim 5.
Claim 19
Dependent Claim
10 words
A resinous article coated with the composition of claim 10.
Claim 20
Dependent Claim
13 words
An article obtained by ultraviolet curing of an article according to claim 15.
Claim 21
Dependent Claim
13 words
An article obtained by ultraviolet curing of an article according to claim 16.
Claim 22
Dependent Claim
13 words
An article obtained by ultraviolet curing of an article according to claim 17.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |