US4584345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant, high-impact resin composition
Assignee: Daicel Corp
•
Filing: 1984-05-29
•
Granted: 1986-04-22
•
Expires: 2004-05-29
Abstract
Abstract Heat-resistant, high-impact thermoplastic resin compositions comprising a graft copolymer (A) obtained by graft-copolymerizing an aromatic vinyl compound and an unsaturated carboxylic acid anhydride onto a rubbery polymer; a composite modifier (B) obtained by graft-copolymerizing an aromatic vinyl compound and a methacrylate ester monomer onto a diene rubber polymer; and an aromatic polycarbonate resin (C).
Inventors
- 👤 Kazunobu Tanaka
- 👤 Zenichi Maruo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L69/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
A synthetic thermoplastic resin composition having high impact and heat resistance, the resin component of which consists essentially of: a blend of A. a graft copolymer obtained by graft-copolymerizing (1) 100 parts by weight of a mixture consisting of (a) from 65 to 95 parts by weight of styrene, substituted styrenes or mixture thereof, and (b) from 5 to 35 parts by weight of an unsaturated dicarboxylic acid anhydride onto (2) from 5 to 50 parts by weight of a first rubbery polymer obtained by addition polymerization of an ethylenically unsaturated monomer; B. a graft copolymer obtained by graft-copolymerizing (1) 100 parts by weight of a mixture consisting of (a) from 20 to 80 parts by weight of styrene, substituted styrenes, or mixture thereof, and (b) from 80 to 20 parts by weight of a methacrylate ester monomer onto (2) from 10 to 60 parts by weight of a second rubbery polymer obtained by addition polymerization of a diene, and C. an aromatic polycarbonate resin, said blend containing from 10 to 60% by weight of component C and the balance is component A and component B, wherein the weight ratio of component A/component B is from 95/5 to 50/50.
Claim 2
Dependent Claim
199 words
A synthetic thermoplastic resin composition having high impact and heat resistance, the resin component of which consists essentially of: a blend of A. a graft copolymer obtained by graft-copolymerizing (1) 100 parts by weight of a mixture consisting of (a) from 65 to 95 parts by weight of styrene, substituted styrenes or mixture thereof, and (b) from 5 to 35 parts by weight of an unsaturated dicarboxylic acid anhydride onto (2) from 5 to 50 parts by weight of a first rubbery polymer obtained by addition polymerization of an ethylenically unsaturated monomer; B. a graft copolymer obtained by graft-copolymerizing (1) 100 parts by weight of a mixture consisting of (a) from 20 to 80 parts by weight of styrene, substituted styrenes, or mixture thereof, and (b) from 80 to 20 parts by weight of a methacrylate ester monomer onto (2) from 10 to 60 parts by weight of a second rubbery polymer obtained by addition polymerization of a diene, and C. an aromatic polycarbonate resin, said blend containing from 10 to 60% by weight of component C and the balance is component A and component B, wherein the weight ratio of component A/component B is from 95/5 to 50/50.
Claim 3
Dependent Claim
43 words
A composition as claimed in claim 1 in which component A has a solubility parameter of about 8.5, component B has a solubility parameter of about 8.9 and component C has a solubility parameter of about 9.8, as determined by the Hildebrand method.
Claim 4
Dependent Claim
110 words
A composition as claimed in claim 2 in which said substituted styrenes are o-methylstyrene, m-methylstyrene, p-methylstyrene, α-methylstyrene, p-chlorostyrene, 2,4-dichlorostyrene and 2,5-dichlorostyrene; said unsaturated dicarboxylic acid anhydride is maleic anhydride, itaconic anhydride, citraconic anhydride, mesaconic anhydride, ethylmaleic anhydride, methylitaconic anhydride or chloromaleic anhydride; said first rubbery polymer is butadiene rubber, butadiene/styrene rubber, butadiene/acrylic rubber, isoprene rubber, isoprene/styrene rubber, isoprene/acrylic rubber, acrylic rubber, styrene/butadiene block rubber or ethylene/propylene copolymer rubber; said methacrylate ester monomer is methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, propyl methacrylate, butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate or benzyl methacrylate; and said second rubbery polymer is butadiene rubber, butadiene/styrene rubber, butadiene/acrylic rubber, isoprene rubber, isoprene/styrene rubber or styrene/butadiene block rubber.
Claim 5
Dependent Claim
17 words
A composition as claimed in claim 1 which contains up to 50% by weight of component C.
References Cited (Backward Citations)
US4367310A
Cited
US4367310B1
Cited
US4393169A
Cited
US4351920A
Cited
US4378449A
Cited
US4419491A
Cited
EP0064692A2
Cited
US4438229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |