US4122130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable blend of polycarbonate and terpolymer of rubber styrene-maleimide
Assignee: Atlantic Richfield Co
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Filing: 1977-05-06
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Granted: 1978-10-24
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Expires: 1997-05-06
Abstract
Abstract Thermoplastic molding compositions consist of a blend of:
Inventors
- 👤 Ronald Anthony Fava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:18
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L69/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
A thermoplastic molding composition which comprises: A. from about 10% to about 90% by weight of a predominantly aromatic polycarbonate; B. from about 10% to about 90% by weight of a copolymer of three components: (aa) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkyldiene, said rubbery block copolymer constituting from 5% to 35% of the copolymer of three components, (bb) an amine nitrogen derivative of an ethylenically unsaturated dicarboxylic acid constituting from 5% to 35% of the copolymer of three components, and (cc) vinyl aromatic composition constituting from 60% to 90% of the copolymer of three components.
Claim 2
Dependent Claim
113 words
A thermoplastic molding composition which comprises: A. from about 10% to about 90% by weight of a predominantly aromatic polycarbonate; B. from about 10% to about 90% by weight of a copolymer of three components: (aa) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkyldiene, said rubbery block copolymer constituting from 5% to 35% of the copolymer of three components, (bb) an amine nitrogen derivative of an ethylenically unsaturated dicarboxylic acid constituting from 5% to 35% of the copolymer of three components, and (cc) vinyl aromatic composition constituting from 60% to 90% of the copolymer of three components.
Claim 3
Dependent Claim
23 words
The composition of claim 1 in which the concentration range of each of A and B is from about 25% to about 75%.
Claim 4
Dependent Claim
18 words
The composition of claim 2 in which the concentration of each of A and B is about 50%.
Claim 5
Dependent Claim
13 words
The composition of claim 1 in which the polycarbonate is a polyphenylene carbonate.
Claim 6
Dependent Claim
104 words
The composition of claim 1 in which said copolymer of three components is prepared by subjecting a copolymer of a a rubbery block polymer prepared in a stereospecific system using from 5% to 35% vinyl aromatic compound and from 65% to 95% conjugated alkyldiene, said rubbery block copolymer constituting from 5% to 35% of the copolymer of three components, from 5% to 35% maleic anhydride, and from 60% to 90% styrene to a basic aqueous nitrogenous system at a temperature of from about 125° to about 200° C. at an autogenous pressure for 0.5 to 48 hours and thereafter depressurizing and devolatilizing the product.
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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |