US4163032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding compositions
Assignee: Bayer AG
•
Filing: 1978-10-20
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Granted: 1979-07-31
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Expires: 1998-10-20
Abstract
Abstract A thermoplastic molding composition having improved flow, toughness. and heat distortion comprising a polymer mixture of (A) 25 to 95% by weight of a graft polymer of 70 to 30% by weight of a mixture of styrene (95 to 50% by weight) and acrylonitrile (5 to 50% by weight) on 30 to 70% by weight of an EPDM-rubber, and (B) 50 to 75% by weight of a terpolymer of acrylonitrile, maleic acid anhydride and styrene, the terpolymer containing 10 to 30 parts by weight of acrylonitrile, 7.5 to 15 parts by weight of maleic acid anhydride, and 82.5 to 55 parts by weight of styrene in copolymerised form.
Inventors
- 👤 Lothar Liebig
- 👤 Frank Wingler
- 👤 Karl-Heinz Ott
- 👤 Gert Humme
- 👤 Alfred Pischtschan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L51/00; C08L51/04; C08L51/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A thermoplastic molding composition comprising a polymer mixture of (A) 25 to 95% by weight of a graft polymer of 70 to 30% by weight of a mixture of 95 to 50% by weight of styrene and of 5 to 50% by weight of and acrylonitrile on 30 to 70% by weight of an EPDM-rubber, and (B) 5 to 75% by weight of a terpolymer of acrylonitrile, maleic acid anhydride and styrene, the terpolymer containing 10 to 30 parts by weight of acrylonitrile, 7.5 to 15 parts by weight of maleic acid anhydride, and 82.5 to 55 parts by weight of styrene in copolymerised form.
Claim 2
Dependent Claim
105 words
A thermoplastic molding composition comprising a polymer mixture of (A) 25 to 95% by weight of a graft polymer of 70 to 30% by weight of a mixture of 95 to 50% by weight of styrene and of 5 to 50% by weight of and acrylonitrile on 30 to 70% by weight of an EPDM-rubber, and (B) 5 to 75% by weight of a terpolymer of acrylonitrile, maleic acid anhydride and styrene, the terpolymer containing 10 to 30 parts by weight of acrylonitrile, 7.5 to 15 parts by weight of maleic acid anhydride, and 82.5 to 55 parts by weight of styrene in copolymerised form.
Claim 3
Dependent Claim
21 words
A thermoplastic molding composition, as claimed in claim 1, wherein the terpolymer has a heterogeneity index U of 0.5 to 1.5.
Claim 4
Dependent Claim
24 words
A thermoplastic molding composition, as claimed in claim 1, wherein the terpolymer has been obtained by continuous mixed polymerisation under steady state concentration conditions.
Claim 5
Dependent Claim
26 words
A thermoplastic molding composition, as claimed in claim 1, wherein the acrylonitrile content of the terpolymer is substantially the same as that of the graft polymer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |