US3697619A
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A coating composition of a copolymer of methyl methacrylate with the polymerizable addition reaction product of an alpha,beta-ethylenically unsaturated acid and an epoxy compound
Assignee: Nippon Paint Co Ltd
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Filing: 1969-12-18
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Granted: 1972-10-10
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Expires: 1989-12-18
Abstract
Abstract A liquid coating composition is formed by copolymerizing without gelation, 50-95 parts by weight of a methyl methacrylate lacquergiving monomer component and 5-50 parts by weight of a polymerizable addition reaction product obtained by the addition reaction of an Alpha , Beta -ethylenically unsaturated acid and an epoxy compound. In those instances where a polyepoxy compound (e.g., diepoxide) is used, the addition reaction is controlled to the extent that a sufficient amount of monoester and an insufficient amount of diester are formed so that substantially no gelatin occurs during copolymerization and/or formation of the coating composition. Films are formed from the coating composition which exhibit excellent durability, impact resistance, shrink resistance, and gasoline resistance.
Inventors
- 👤 Akira Miyata
- 👤 Chikayoshi Tomita
- 👤 Akio Suzuki
- 👤 Hideyo Okubo
- 👤 Masahiko Nagakuni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:13
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/66; C08; C08F; C08F251/00; C08F251/02; C08F299/00; C08F299/02; C08F299/026; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/18; C08G59/40; C08G59/42; C08G59/4292; C09; C09D; C09D163/00; C09D163/10; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S525/00; Y10S525/922; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12701; Y10T428/12708; Y10T428/12722; Y10T428/12736; Y10T428/12743; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
A coating composition in accordance with claim 1 wherein at least 10 percent of the acid employed is allowed to react with said epoxy compound.
Claim 2
Dependent Claim
36 words
A coating composition in accordance with claim 1 wherein said epoxy compound is a polyepoxide and there is an insufficient amount of diester formed during said addition reaction to cause gelation to occur during said copolymerization.
Claim 3
Dependent Claim
39 words
A coating composition in accordance with claim 1 wherein said member (a) is present in an amount of from 55-95 percent by weight and said addition reaction product is present in an amount of from 5-45 percent by weight.
Claim 4
Dependent Claim
14 words
A coating composition in accordance with claim 1 which also includes a coloring pigment.
Claim 5
Dependent Claim
186 words
A method of forming the coating composition of claim 1 comprising copolymerizing (a) 50-95 parts by weight of a member selected from the group consisting of (1) methyl methacrylate and (2) an admixture of methyl methacrylate and 2-30 percent by weight of a monomer copolymerizable therewith selected from acrylates of an alkanol having one to 18 carbon atoms, methacrylates of an alkanol having two to 18 carbon atoms, vinyl acetate, vinyl propionate, styrene, vinyl toluene, acrylonitrile, diesters of fumaric acid with alkanols having one to four carbon atoms, diesters of maleic acid with alkanols having one to four carbon atoms, glycidyl acrylate, glycidyl methacrylate, acrylamide, and methacrylamide; and (b) 5-50 parts by weight of a polymerizable addition reaction product obtained by reacting an Alpha , Beta -ethylenically unsaturated acid and a polyepoxy in an amount of about 0.1-10.0 times the number of moles of said acid employed; and controlling the amount of diester formed during said addition reaction below that point at which gelation will occur during copolymerization by a control step which comprises using a chain transfer agent during said addition reaction and/or said copolymerization.
Claim 6
Dependent Claim
203 words
A method of forming the coating composition of claim 1 comprising copolymerizing (a) 50-95 parts by weight of a member selected from the group consisting of (1) methyl methacrylate and (2) an admixture of methyl methacrylate and 2-30 percent by weight of a monomer copolymerizable therewith selected from acrylates of an alkanol having one to 18 carbon atoms, methacrylates of an alkanol having two to 18 carbon atoms, vinyl acetate, vinyl propionate, styrene, vinyl toluene, acrylonitrile, diesters of fumaric acid with alkanols having one to four carbon atoms, diesters of maleic acid with alkanols having one to four carbon atoms, glycidyl acrylate, glycidyl methacrylate, acrylamide, and methacrylamide; and (b) 5-50 parts by weight of a polymerizable addition reaction product obtained by reacting an Alpha , Beta -ethylenically unsaturated acid and a polyepoxy in an amount of about 0.1-10.0 times the number of moles of said acid employed; and controlling the amount of diester formed during said addition reaction below that point at which gelation will occur during copolymerization by a control step which comprises stopping said addition reaction at a time predetermined, which predetermined time indicates that insufficient amount of diester has as yet been formed to cause gelation to occur during copolymerization.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |