US4381373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1981-11-19
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Granted: 1983-04-26
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Expires: 2001-11-19
Abstract
Abstract A heat resistant resin composition comprises 10 to 90 wt. % of a copolymer (A) having 15 to 50 wt. parts of N-phenylmaleimide component, 85 to 40 wt. parts of a vinyl aromatic monomer component and 0 to 30 wt. parts of a vinyl comonomer component to be 100 wt. parts in total; and 90 to 10 wt. % of a copolymer (B) having 15 to 30 wt. parts of a cyanovinyl monomer component, 85 to 65 wt. parts of a vinyl aromatic monomer component and 0 to 30 wt. parts of a vinyl comonomer component.
Inventors
- 👤 Sadao Ikuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:37
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
105 words
A heat resistant resin composition which consists essentially of 10 to 90 wt. % of a copolymer (A) having 15 to 50 wt.parts of N-phenylmaleimide component, 85 to 40 wt.parts of a vinyl aromatic monomer component and 0 to 30 wt.parts of a vinyl comonomer component to be 100 wt.parts in total, which is obtained by imidization of vinyl aromatic/maleic anhydride copolymer with an aromatic amine; and 90 to 10 wt. % of a copolymer (B) having 15 to 30 wt.parts of a cyanovinyl monomer component, 85 to 65 wt.parts of a vinyl aromatic monomer component and 0 to 30 wt.parts of vinyl comonomer component.
Claim 2
Dependent Claim
105 words
A heat resistant resin composition which consists essentially of 10 to 90 wt. % of a copolymer (A) having 15 to 50 wt.parts of N-phenylmaleimide component, 85 to 40 wt.parts of a vinyl aromatic monomer component and 0 to 30 wt.parts of a vinyl comonomer component to be 100 wt.parts in total, which is obtained by imidization of vinyl aromatic/maleic anhydride copolymer with an aromatic amine; and 90 to 10 wt. % of a copolymer (B) having 15 to 30 wt.parts of a cyanovinyl monomer component, 85 to 65 wt.parts of a vinyl aromatic monomer component and 0 to 30 wt.parts of vinyl comonomer component.
Claim 3
Dependent Claim
18 words
The heat resistant resin composition according to claim 1 wherein said vinyl aromatic monomer component is styrene component.
Claim 4
Dependent Claim
17 words
The heat resistant resin composition according to claim 1 wherein said cyanovinyl monomer component is acrylonitrile component.
Claim 5
Dependent Claim
46 words
In a process for producing a heat resistant composition of claim 1 by copolymerizing maleic anhydride, a vinyl aromatic monomer and a cyanovinyl monomer an improvement characterized in that maleic anhydride component of a copolymer is imidized with an aromatic amine in a step of copolymerization.
Claim 6
Dependent Claim
58 words
The process according to claim 4 which comprises a step of a bulk polymerization of maleic anhydride and a vinyl aromatic monomer and a step of a suspension copolymerization of the resulting syrup mixture and a cyanovinyl monomer suspended in an aqueous solution together with an imidation of maleic anhydride component of the copolymer with an aromatic amine.
Claim 7
Dependent Claim
46 words
The process according to claim 5 wherein a vinyl aromatic monomer is incorporated in a polymerization system and a mixture of a vinyl aromatic monomer and maleic anhydride is continuously fed to the step of the bulk copolymerization of maleic anhydride and a vinyl aromatic monomer.
Claim 8
Dependent Claim
47 words
The process according to claim 5 wherein a vinyl aromatic monomer containing 5 wt. % or less of maleic anhydride is incorporated in a polymerization system and maleic anhydride is continuously fed in the step of the bulk copolymerization of maleic anhydride and a vinyl aromatic monomer.
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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |