US3760033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resin compositions
Assignee: Berger Jenson and Nicholson Ltd
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Filing: 1971-03-10
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Granted: 1973-09-18
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Expires: 1991-03-10
Abstract
Abstract Curable coating compositions based on unsaturated polyester resin and styrene, particularly those in which the polyester resin has a high degree of unsaturation and/or of chain branching, may be difficult to thin to application viscosity without hazing or phase separation. This problem is solved by adding a minor proportion of an unsaturated hydroxy-ester, particularly Beta -hydroxyethyl methacrylate or Beta hydroxypropyl methacrylate.
Inventors
- 👤 K Arbuckle
- 👤 D Lazarus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:53
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A composition as claimed in claim 1, wherein the copolymerizable monomeric unsaturated ester containing a hydroxyl group in its molecule has the general formula: CH2:CR.COOR1 where R is a hydrogen atom or a methyl or ethyl group, and R1 is a hydroxy-substituted alkyl group having from one to 16 carbon atoms.
Claim 2
Dependent Claim
41 words
A composition as claimed in claim 1, wherein the copolymerizable monomeric unsaturated ester containing a hydroxyl group in its molecule is present in a proportion of from 2 TO 15 percent by weight on the weight of the unsaturated polyester resin.
Claim 3
Dependent Claim
180 words
A curable composition as claimed in claim 1 comprising a mixture of i. an unsaturated polyester resin having an acid value of not more than 50, in which resin the unsaturated component is an Alpha - Beta -ethylenically unsaturated dicarboxylic acid, the molar ratio of Alpha - Beta -ethylenically unsaturated acid to all other dicarboxylic components being at least 1.3:1, and in which a tri- or poly-functional component is present in a molar proportion of at least 2.0 percent, and ii. styrene or vinyl toluene, in a proportion of not more than 500 percent by weight on the weight of the unsaturated polyester resin and, iii. from 1 to 50 percent, by weight on the weight of the unsaturated polyester resin, of a copolymerizable monomeric unsaturated ester having the formual CH2:CR.COOR1 where R is a hydrogen atom or a methyl or ethyl group, and R1 is a hydroxy-substitiute alkyl group having from one to 16 carbon atoms, the composition being thinnable with styrene or vinyl toluene to a viscosity of 4.0 poise without passing the haze point of the mixture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |