US4357267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic moulding compositions of cellulose esters
Assignee: Bayer AG
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Filing: 1980-12-11
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Granted: 1982-11-02
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Expires: 2000-12-11
Abstract
Abstract Transparent thermoplastic moulding compositions having improved mechanical properties consist essentially of a cellulose ester of aliphatic C 1 -C 5 -carboxylic acids and a graft copolymer of an ethylene vinyl ester copolymer having grafted thereon polymerized units of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid and, optionally, C 2 -C 4 -olefins.
Inventors
- 👤 Heinrich Alberts
- 👤 Winfried Fischer
- 👤 Friedemann Muller
- 👤 Horst Peters
- 👤 Christian Leuschke
- 👤 Hans-Peter Baasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:46
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L51/00; C08L51/003; C08L51/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
Thermoplastic moulding compositions, consisting essentially of (1) from 1 to 99% by weight of a cellulose ester of one or more aliphatic C 1 -C 5 -carboxylic acids, and (2) from 99 to 1% by weight of a graft copolymer of (a) from 5 to 90% by weight of an ethylene-vinyl ester copolymer, containing from 5 to 75% by weight of incorporated vinyl ester, as the graft substrate and polymerized units of (b) from 95 to 10% by weight of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid, and (c) from 0 to 20% by weight of C 2 -C 4 -α-olefins, the sum of components (1) and (2) and (a) to (c) always amounting to 100% by weight.
Claim 2
Dependent Claim
121 words
Thermoplastic moulding compositions, consisting essentially of (1) from 1 to 99% by weight of a cellulose ester of one or more aliphatic C 1 -C 5 -carboxylic acids, and (2) from 99 to 1% by weight of a graft copolymer of (a) from 5 to 90% by weight of an ethylene-vinyl ester copolymer, containing from 5 to 75% by weight of incorporated vinyl ester, as the graft substrate and polymerized units of (b) from 95 to 10% by weight of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid, and (c) from 0 to 20% by weight of C 2 -C 4 -α-olefins, the sum of components (1) and (2) and (a) to (c) always amounting to 100% by weight.
Claim 3
Dependent Claim
130 words
Thermoplastic moulding compositions as claimed in claim 1, consisting essentially of (1) from 1 to 99% by weight of a cellulose ester of one or more aliphatic C 1 -C 5 -carboxylic acids, and (2) from 99 to 1% by weight of a graft copolymer of (a) from 5 to 90% by weight of an ethylene-vinyl acetate copolymer, containing from 5 to 75% by weight of incorporated vinyl acetate, as the graft substrate and polymerized units of (b) from 95 to 10% by weight of vinyl acetate and/or C 1 -C 4 -alkyl esters of acrylic and/or methacrylic acid, and (c) from 0 to 20% by weight of C 2 -C 4 -α-olefins, the sum of components (1) and (2) and (a) to (c) always amounting to 100% by weight.
Claim 4
Dependent Claim
46 words
Thermoplastic moulding compositions as claimed in claims 1 or 2, consisting essentially of (1) from 40 to 95% by weight of component 1, and (2) from 60 to 5% by weight of component 2, the sum of components (1) and (2) amounting to 100% by weight.
Claim 5
Dependent Claim
23 words
Thermoplastic moulding compositions as claimed in claims 1 or 2, containing as component (1) cellulose acetobutyrate, cellulose acetopropionate, cellulose acetate or mixtures thereof.
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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |