US4525536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1983-06-06
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Granted: 1985-06-25
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Expires: 2003-06-06
Abstract
Abstract A heat resistant resin composition comprising from 10 to 90% by weight of a copolymer A and from 90 to 10% by weight of a copolymer B, in which the copolymer A is composed of an N-aromatic maleimide monomer residue, a maleimide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the total content of the N-aromatic maleimide monomer residue and the maleimide monomer residue being from 10 to 45%, the content of the N-aromatic maleimide monomer residue being greater than the content of the maleimide monomer residue, the content of the vinyl aromatic monomer residue being from 90 to 55% and the content of said other vinyl monomer residue being from 0 to 20%, and the copolymer B is composed of a vinyl cyanide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the content of the vinyl cyanide monomer residue being from 20 to 55%, the content of the vinyl aromatic monomer residue being from 80 to 45% and the content of said other vinyl monomer residue being from 0 to 20%.
Inventors
- 👤 Sadao Ikuma
- 👤 Yuji Aoki
- 👤 Noboru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:23
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L35/00; C08L35/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A heat resistant resin composition comprising from 10 to 90% by weight of a copolymer A and from 90 to 10% by weight of a copolymer B, in which the copolymer A is composed of an N-aromatic maleimide monomer residue, a maleimide monomer residue wherein the N atom of said maleimide is bonded to a hydrogen atom, a vinyl aromatic monomer residue and, optionally an other vinyl monomer residue, the total content of the N-aromatic maleimide monomer residue and the maleimide monomer residue being from 10 to 45%, the content of the N-aromatic maleimide monomer residue being greater than the content of the maleimide monomer residue, the content of the vinyl aromatic monomer residue being from 90 to 55% and the content of said other vinyl monomer residue being from 0 to 20%, and the copolymer B is composed of a vinyl cyanide monomer residue, a vinyl aromatic monomer residue and, optionally an other vinyl monomer residue, the content of the vinyl cyanide monomer residue being from 20 to 55%, the content of the vinyl aromatic monomer residue being from 80 to 45% and the content of said other vinyl monomer residue being from 0 to 20%.
Claim 2
Dependent Claim
197 words
A heat resistant resin composition comprising from 10 to 90% by weight of a copolymer A and from 90 to 10% by weight of a copolymer B, in which the copolymer A is composed of an N-aromatic maleimide monomer residue, a maleimide monomer residue wherein the N atom of said maleimide is bonded to a hydrogen atom, a vinyl aromatic monomer residue and, optionally an other vinyl monomer residue, the total content of the N-aromatic maleimide monomer residue and the maleimide monomer residue being from 10 to 45%, the content of the N-aromatic maleimide monomer residue being greater than the content of the maleimide monomer residue, the content of the vinyl aromatic monomer residue being from 90 to 55% and the content of said other vinyl monomer residue being from 0 to 20%, and the copolymer B is composed of a vinyl cyanide monomer residue, a vinyl aromatic monomer residue and, optionally an other vinyl monomer residue, the content of the vinyl cyanide monomer residue being from 20 to 55%, the content of the vinyl aromatic monomer residue being from 80 to 45% and the content of said other vinyl monomer residue being from 0 to 20%.
Claim 3
Dependent Claim
44 words
The heat resistant resin composition according to claim 1 wherein the vinyl aromatic monomer residue is a residue derived from a vinyl aromatic compound selected from the group consisting of styrene, α-methyl styrene, p-methyl styrene, t-butyl styrene, a styrene halogenide and a mixture thereof.
Claim 4
Dependent Claim
36 words
The heat resistant resin composition according to claim 1 wherein the vinyl cyanide monomer residue is a residue derived from a vinyl cyanide compound selected from the group consisting of acrylonitrile, methacrylonitrile and a mixture thereof.
Claim 5
Dependent Claim
41 words
The heat resistant resin composition according to claim 1 wherein the N-aromatic maleimide residue is a residue of N-aromatic maleimide obtained by condensation of a primary aromatic amine with fumaric acid, maleic acid, maleic acid anhydride or other maleic acid derivative.
Claim 6
Dependent Claim
29 words
The heat resistant resin composition according to claim 4 wherein the primary aromatic amine is selected from the group consisting of aniline, toluidine, nitro aniline, phenylenediamine and α-naphthyl amine.
Claim 7
Dependent Claim
29 words
The heat resistant resin composition according to claim 1 wherein the maleimide monomer residue is a residue derived from maleimide obtained by condensation of ammonia with maleic acid anhydride.
Claim 8
Dependent Claim
42 words
The heat resistant resin composition according to claim 1 wherein said other vinyl monomer residue is a residue derived from a monomer selected from the group consisting of acrylonitrile, methacrylonitrile, methyl acrylate, methyl methacrylate, maleic acid anhydride, dimethyl maleate and dimethyl fumarate.
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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |