US5234978A
Expired / Lapsed
US
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Composition containing a polymer of unsaturated hydrocarbon, a c1-4 alkyl or hydroxyalkylether of starch and a vinyl or acryl polymer as a compatibilizing agent
Assignee: Cargill Inc
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Filing: 1991-08-14
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Granted: 1993-08-10
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Expires: 2011-08-14
Abstract
Abstract A composition comprising a polymer of an unsaturated hydrocarbon, a C 1-4 alkyl or hydroxyalkylether of starch having a degree of substitution of at least 0.25, and a polyhydric aliphatic alcohol having 2 to 10 carbon atoms and 2 to 6 hydroxyl groups wherein the compatibilizing agent can be a vinyl copolymer, acrylic copolymer and mixtures thereof. The composition can be used in the preparation of biodegradable plastics.
Inventors
- 👤 Rita M. Delrue
- 👤 Anton L. German
- 👤 Henricus E. H. Meijer
- 👤 Antonius H. Zijderveld
- 👤 Jan Bussink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/04; C08L3/08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0869; C08L2201/00; C08L2201/06; C08L2205/00; C08L2205/08; C08L2207/00; C08L2207/06; C08L2207/066; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A composition containing a polymer of an unsaturated hydrocarbon, a C 1-4 alkyl or hydroxyalkyl ether of starch having a degree of substitution of at least 0.25 and a compatibilizing agent that is a copolymer selected from the group consisting of ethylene-vinyl acetate, ethylene-acrylic acid, vinyl acetate-(meth)acrylic acid, and terpolymers of ethylene-vinyl-acetate-(meth)acrylic acid, wherein the composition also contains a polyhydric aliphatic alcohol having 2-10 carbon atoms and 2-6 hydroxyl groups as a dispersant/plasticizer/lubricant for the starch ether.
Claim 2
Dependent Claim
77 words
A composition containing a polymer of an unsaturated hydrocarbon, a C 1-4 alkyl or hydroxyalkyl ether of starch having a degree of substitution of at least 0.25 and a compatibilizing agent that is a copolymer selected from the group consisting of ethylene-vinyl acetate, ethylene-acrylic acid, vinyl acetate-(meth)acrylic acid, and terpolymers of ethylene-vinyl-acetate-(meth)acrylic acid, wherein the composition also contains a polyhydric aliphatic alcohol having 2-10 carbon atoms and 2-6 hydroxyl groups as a dispersant/plasticizer/lubricant for the starch ether.
Claim 3
Dependent Claim
17 words
A composition according to claim 1, wherein the polyhydric alcohol is ethylene glycol, propylene glycol or glycerine.
Claim 4
Dependent Claim
14 words
A composition according to claim 1, wherein the hydrocarbon polymer is an ethylene polymer.
Claim 5
Dependent Claim
22 words
A composition according to claim 1, wherein the composition contains a condensation product of starch and propylene oxide as said starch ether.
Claim 6
Dependent Claim
17 words
A composition according to claim 1, wherein the starch ether has a degree of substitution of 0.4-1.0.
Claim 7
Dependent Claim
35 words
A composition according to claim 1, wherein the composition contains polyethylene as said unsaturated hydrocarbon, hydroxy propyl starch as said starch ether, ethylene-acrylic acid copolymer as said compatabilizing agent and ethylene glycol as said alcohol.
Claim 8
Dependent Claim
15 words
A composition according to claim 7, wherein the polyethylene is a linear low density polyethylene.
Claim 9
Dependent Claim
37 words
A composition according to claim 1, wherein the composition contains 20-70% by weight of polymer of unsaturated hydrocarbon, 20-80% by weight of starch ether, 11-19% by weight of compatibilizing agent and 2-8% by weight of polyhydric alcohol.
Claim 10
Dependent Claim
17 words
A composition according to claim 6, wherein the starch ether has a degree of substitution of 0.4-1.0.
Claim 11
Dependent Claim
37 words
A composition according to claim 9, wherein said composition contains 20-70% by weight of polymer of unsaturated hydrocarbon, 20-80% by weight of starch ether, 11-19% by weight of compatibilizing agent and 2-8% by weight of polyhydric alcohol.
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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) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |