Patent US4631311A successfully refreshed from Google Patents.
US4631311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile free blends of a polycarbonate, a graft rubber and a terpolymer resin
Assignee: Bayer AG
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Filing: 1985-08-08
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Granted: 1986-12-23
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Expires: 2005-08-08
Abstract
Abstract This invention relates to thermoplastic moulding compounds free from nitrile groups, containing a mixture of randomly structured copolymers containing methyl methacrylate, maleic acid anhydride and aromatic vinyl compounds, aromatic polycarbonate resins and an elastomer grafted with methyl methacrylate.
Inventors
- 👤 Frank Wingler
- 👤 Otto Koch
- 👤 Christian Lindner
- 👤 Klaus Reinking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:41
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/14; C08L51/00; C08L51/04; C08L69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A thermoplastic moulding composition consisting essentially of a blend of (A) 12-78 parts by weight, based on the weight of the moulding composition, of a randomly structured copolymer of (a 1 ) 24 to 87 parts by weight, based on the weight of the copolymer, of styrene, p-methyl styrene or mixtures thereof (a 2 ) 8 to 30 parts by weight, based on the weight of the copolymer, of maleic acid anhydride and (a 3 ) 5 to 68 parts by weight, based on the weight of the copolymer, of methyl methacrylate, (B) 12-78 parts by weight, based on the weight of the moulding composition, of a thermoplastic aromatic polycarbonate and (C) 10-40 parts by weight, based on the weight of the moulding composition, of a graft polymer of 20 to 80 parts, by weight of the graft polymer, of methacrylate on 80 to 20 parts, by weight of the graft polymer, of a rubber having a glass transition temperature below -20° C.
Claim 2
Dependent Claim
163 words
A thermoplastic moulding composition consisting essentially of a blend of (A) 12-78 parts by weight, based on the weight of the moulding composition, of a randomly structured copolymer of (a 1 ) 24 to 87 parts by weight, based on the weight of the copolymer, of styrene, p-methyl styrene or mixtures thereof (a 2 ) 8 to 30 parts by weight, based on the weight of the copolymer, of maleic acid anhydride and (a 3 ) 5 to 68 parts by weight, based on the weight of the copolymer, of methyl methacrylate, (B) 12-78 parts by weight, based on the weight of the moulding composition, of a thermoplastic aromatic polycarbonate and (C) 10-40 parts by weight, based on the weight of the moulding composition, of a graft polymer of 20 to 80 parts, by weight of the graft polymer, of methacrylate on 80 to 20 parts, by weight of the graft polymer, of a rubber having a glass transition temperature below -20° C.
References Cited (Backward Citations)
US3880783A
Cited
US4197376A
Cited
US4218544A
Cited
US4351920A
Cited
US4404322A
Cited
EP0135492A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |