Patent US2581529A successfully refreshed from Google Patents.
US4097429A
Expired / Lapsed
US
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Thermoplastically processible moulding compound of cellulose esters and ethylene/vinyl esters copolymers
Assignee: Bayer AG
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Filing: 1976-05-24
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Granted: 1978-06-27
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Expires: 1996-05-24
Abstract
Abstract Thermoplastically processible moulding compounds consisting essentially of (1) at least one cellulose ester of an aliphatic carboxylic acid (2) an incompatible ethylene/vinyl ester copolymer containing 30 to 75% by weight of vinyl esters and (3) optionally, a compatible ethylene/vinyl ester copolymer containing 75.1 to 98% by weight of vinyl ester.
Inventors
- 👤 Salah Elabd Elghani
- 👤 Winfried Fischer
- 👤 Richard Prinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:57
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/12; C08L1/14; C08L2205/00; C08L2205/02; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
An injection molded or extruded article of (1) 1 to 99 percent by weight of at least one cellulose ester of a C 1 -C 5 -aliphatic carboxylic acid, the relative viscosity thereof being between 2.5 and 6.0, (2) 99 to 1 percent by weight of an incompatible ethylene/vinyl ester copolymer containing 30 to 75 percent by weight of vinyl esters of C 1 -C 18 -aliphatic or C 7 -C 11 -aromatic carboxylic acids and (3) 0-50 percent by weight of a compatible ethylene/vinyl ester copolymer containing 75.1 to 98 percent by weight of vinylesters of C 1 -C 18 -aliphatic or C 7 -C 11 -aromatic carboxylic acids, the sum of components (1) to (3) being 100 percent by weight.
Claim 2
Dependent Claim
122 words
An injection molded or extruded article of (1) 1 to 99 percent by weight of at least one cellulose ester of a C 1 -C 5 -aliphatic carboxylic acid, the relative viscosity thereof being between 2.5 and 6.0, (2) 99 to 1 percent by weight of an incompatible ethylene/vinyl ester copolymer containing 30 to 75 percent by weight of vinyl esters of C 1 -C 18 -aliphatic or C 7 -C 11 -aromatic carboxylic acids and (3) 0-50 percent by weight of a compatible ethylene/vinyl ester copolymer containing 75.1 to 98 percent by weight of vinylesters of C 1 -C 18 -aliphatic or C 7 -C 11 -aromatic carboxylic acids, the sum of components (1) to (3) being 100 percent by weight.
Claim 3
Dependent Claim
51 words
An article as claimed in claim 1, which consists essentially of 50 to 99 percent by weight of component (1), 1 to 50 percent by weight of component (2) and 0 to 25 percent by weight of component (3), the sum of components (1) to (3) being 100 percent by weight.
Claim 4
Dependent Claim
51 words
An article as claimed in claim 2, which consists essentially of 99 to 70 percent by weight of component (1) 1 to 30 percent by weight of component (2) and 0 to 25 percent by weight of component (3), the sum of components (1) to (3) being 100 percent by weight.
Claim 5
Dependent Claim
21 words
An article as claimed in claim 1, in which component (2) contains 60 to 75 percent by weight of vinyl ester.
Claim 6
Dependent Claim
19 words
An article as claimed in claim 1, in which component (1) comprises cellulose acetate, cellulose acetopropionate or cellulose acetobutyrate.
Claim 7
Dependent Claim
39 words
An article as claimed in claim 5, in which component (1) comprises cellulose acetobutyrate containing 40 to 50% by weight of butyric acid, 15 to 26% by weight of acetic acid and 0.75 to 1.95% by weight of hydroxyl.
Claim 8
Dependent Claim
37 words
An article as claimed in claim 6, in which the cellulose acetobutyrate contains 42 to 46% by weight of butyric acid, 18 to 21% by weight of acetic acid and 1.0 to 1.7 by weight of hydroxyl.
Claim 9
Dependent Claim
39 words
An article as claimed in claim 5, in which component (1) comprises cellulose acetopropionate containing 50 to 63.5% by weight of propionic acid, 1 to 12% by weight of acetic acid and 1.2 to 1.95% by weight of hydroxyl.
Claim 10
Dependent Claim
36 words
An article as claimed in claim 8, in which the cellulose acetopropionate contains 54 to 58% by weight of propionic acid, 5 to 8% by weight of acetic acid 1.5 to 1.8% by weight of hydroxyl.
Claim 11
Dependent Claim
16 words
An article as claimed in claim 5, in which component (1) comprises a secondary cellulose acetate.
Claim 12
Dependent Claim
23 words
An article as claimed in claim 1, in which the vinyl ester is the vinyl ester of a saturated aliphatic halogenated monocarboxylic acid.
Claim 13
Dependent Claim
27 words
An article as claimed in claim 1, in which the vinyl ester component is vinyl formate, acetate, propionate, chloropropionate, butyrate, isobutyrate, caproate, laurate, myristate, stearate or benzoate.
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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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |