US4305869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymers with improved heat distortion resistance
Assignee: Bayer Antwerpen NV
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Filing: 1979-12-17
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Granted: 1981-12-15
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Expires: 1999-12-17
Abstract
Abstract Terpolymers of a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride and an alkyl methacrylate are found to possess an unexpectedly high heat distortion temperature over a certain range of composition.
Inventors
- 👤 Yoon C. Lee
- 👤 Quirino A. Trementozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08F; C08F291/00; C08F291/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
47 words
A polymeric composition comprising a terpolymer of from 45 to 83% by weight of a monoalkenyl aromatic monomer, from 15 to 35% by weight of an unsaturated dicarboxylic acid anhydride and from 2 to 20% by weight of a C 1 to C 3 alkyl methacrylate ester.
Claim 2
Dependent Claim
47 words
A polymeric composition comprising a terpolymer of from 45 to 83% by weight of a monoalkenyl aromatic monomer, from 15 to 35% by weight of an unsaturated dicarboxylic acid anhydride and from 2 to 20% by weight of a C 1 to C 3 alkyl methacrylate ester.
Claim 3
Dependent Claim
29 words
The terpolymer composition according to claim 1 in which the amount of C 1 to C 3 alkyl methacrylate is from 4 to 10% by weight of the terpolymer.
Claim 4
Dependent Claim
20 words
The terpolymer composition according to claim 1 in which the C 1 to C 3 alkyl methacrylate is methyl methacrylate.
Claim 5
Dependent Claim
42 words
A terpolymer composition comprising from 50 to 78% of a monoalkenyl aromatic monomer, from 20 to 30% of an unsaturated dicarboxylic acid anhydride and from 2 to 20% of a C 1 to C 3 alkyl methacrylate, all percentages being by weight.
Claim 6
Dependent Claim
42 words
A terpolymer composition comprising from 50 to 78% of a monoalkenyl aromatic monomer, from 20 to 30% of an unsaturated dicarboxylic acid anhydride and from 2 to 20% of a C 1 to C 3 alkyl methacrylate, all percentages being by weight.
Claim 7
Dependent Claim
18 words
The terpolymer composition of claim 4 that includes up to 5% by weight of an effective antioxidant stabilizer.
Claim 8
Dependent Claim
13 words
The terpolymer composition of claim 5 in which the antioxidant stabilizer comprises 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.
Claim 9
Dependent Claim
40 words
A terpolymer composition comprising a terpolymer of from 60 to 76% of styrene, 20 to 30% of maleic anhydride and 4 to 10% of methyl methacrylate, said composition also comprising up to 2% of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; all parts being by weight.
Claim 10
Dependent Claim
40 words
A terpolymer composition comprising a terpolymer of from 60 to 76% of styrene, 20 to 30% of maleic anhydride and 4 to 10% of methyl methacrylate, said composition also comprising up to 2% of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; all parts being by weight.
Claim 11
Dependent Claim
90 words
A polyblend comprising: A. from 20 to 80% by weight of an ABS polymer consisting essentially of: (1) a matrix copolymer; and (2) a diene rubber substrate grafted with a superstrate copolymer wherein the rubber substrate provides from 5 to 90% of the weight of the ABS polymer and the matrix polymer and the superstrate polymer are each formed by the polymerization of styrene and acrylonitrile in a weight ratio of from 60:40 to 80:20; and B. from 80 to 20% by weight of a terpolymer according to claim 1.
Claim 12
Dependent Claim
90 words
A polyblend comprising: A. from 80 to 20% by weight of an ABS polymer consisting essentially of: (1) a matrix copolymer; and (2) a diene rubber grafted with a superstrate copolymer wherein the rubber substrate provides from 10 to 50% of the weight of the ABS polymer and the matrix polymer and the superstrate polymer are each formed by the polymerization of styrene and acrylonitrile in a weight ratio of from 60:40 to 80:20; and B. from 20 to 80% by weight of a terpolymer composition according to claim 7.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |