US5087650A
Expired / Lapsed
US
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Biodegradable plastics
Assignee: WILLOW RIDGE PLASTICS Inc
•
Filing: 1990-12-05
•
Granted: 1992-02-11
•
Expires: 2010-12-05
Abstract
Abstract A biodegradable plastic composition prepared by mixing: (a) dry unmodified starch, e.g. Pearl starch, (b) a copolymer of an olefin and a comonomer selected from the group of C 1-6 alkylacrylates, C 1-6 alkylmethacrylates, and vinyl acetate, and optionally also including, (c) a poly(mono)olefin or a poly(mixed)olefin, and articles manufactured by injection molding or blowing films of this composition.
Inventors
- 👤 Julious L. Willett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:08
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0869; C08L23/10; C08L2207/00; C08L2207/06; C08L2207/066
Claims Analysis
Total Claims: 88
Claim 1
Independent Claim
75 words
A polymer alloy composition prepared by mixing: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized and said copolymer.
Claim 2
Dependent Claim
75 words
A polymer alloy composition prepared by mixing: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized and said copolymer.
Claim 3
Dependent Claim
18 words
The composition set forth in claim 1, wherein said copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 4
Dependent Claim
18 words
The composition set forth in claim i, wherein said copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 5
Dependent Claim
16 words
The composition set forth in claim 1, wherein said copolymer comprises an olefin and vinyl acetate.
Claim 6
Dependent Claim
12 words
The composition set forth in claim 2, wherein said olefin is ethylene.
Claim 7
Dependent Claim
12 words
The composition set forth in claim 3, wherein said olefin is ethylene.
Claim 8
Dependent Claim
12 words
The composition set forth in claim 4, wherein said olefin is ethylene.
Claim 9
Dependent Claim
14 words
The composition set forth in claim 5, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 10
Dependent Claim
14 words
The composition set forth in claim 5, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 11
Dependent Claim
129 words
A polymer alloy composition prepared by mixing: (a) starch which has been neither destructurized nor gelatinized, (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive, to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized, said copolymer, and said polyolefin.
Claim 12
Dependent Claim
129 words
A polymer alloy composition prepared by mixing: (a) starch which has been neither destructurized nor gelatinized, (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive, to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized, said copolymer, and said polyolefin.
Claim 13
Dependent Claim
12 words
The composition set forth in claim 10, wherein said polyolefin is polyethylene.
Claim 14
Dependent Claim
12 words
The composition set forth in claim 10, wherein said polyolefin is polypropylene.
Claim 15
Dependent Claim
12 words
The composition set forth in claim 10, wherein said polyolefin is polyisobutylene.
Claim 16
Dependent Claim
19 words
The composition set forth in claim 10, wherein said first copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 17
Dependent Claim
19 words
The composition set forth in claim 10, wherein said first copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 18
Dependent Claim
17 words
The composition set forth in claim 10, wherein said first copolymer comprises an olefin and vinyl acetate.
Claim 19
Dependent Claim
12 words
The composition set forth in claim 14, wherein said olefin is ethylene.
Claim 20
Dependent Claim
12 words
The composition set forth in claim 15, wherein said olefin is ethylene.
Claim 21
Dependent Claim
14 words
The composition set forth in claim 17, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 22
Dependent Claim
14 words
The composition set forth in claim 17, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 23
Dependent Claim
81 words
A process of preparing a polymer alloy composition comprising the step of mixing: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized and said copolymer.
Claim 24
Dependent Claim
81 words
A process of preparing a polymer alloy composition comprising the step of mixing: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized and said copolymer.
Claim 25
Dependent Claim
18 words
The process set forth in claim 21, wherein said copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 26
Dependent Claim
18 words
The process set forth in claim 21, wherein said copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 27
Dependent Claim
16 words
The process set forth in claim 21, wherein said copolymer comprises an olefin and vinyl acetate.
Claim 28
Dependent Claim
12 words
The process set forth in claim 22, wherein said olefin is ethylene.
Claim 29
Dependent Claim
12 words
The process set forth in claim 23, wherein said olefin is ethylene.
Claim 30
Dependent Claim
12 words
The process set forth in claim 24, wherein said olefin is ethylene.
Claim 31
Dependent Claim
14 words
The process set forth in claim 25, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 32
Dependent Claim
14 words
The process set forth in claim 25, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 33
Dependent Claim
135 words
A process of preparing a polymer alloy composition comprising the step of mixing: (a) starch which has been neither destructurized nor gelatinized, (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive, to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized, said copolymer, and said polyolefin.
Claim 34
Dependent Claim
135 words
A process of preparing a polymer alloy composition comprising the step of mixing: (a) starch which has been neither destructurized nor gelatinized, (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive, to form a polymer alloy composition consisting of said starch which has been neither destructurized nor gelatinized, said copolymer, and said polyolefin.
Claim 35
Dependent Claim
12 words
The process set forth in claim 30, wherein said polyolefin is polyethylene.
Claim 36
Dependent Claim
12 words
The process set forth in claim 30, wherein said polyolefin is polypropylene.
Claim 37
Dependent Claim
12 words
The process set forth in claim 30, wherein said polyolefin is polyisobutylene.
Claim 38
Dependent Claim
19 words
The process set forth in claim 30, wherein said first copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 39
Dependent Claim
19 words
The process set forth in claim 30, wherein said first copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 40
Dependent Claim
17 words
The process set forth in claim 30, wherein said first copolymer comprises an olefin and vinyl acetate.
Claim 41
Dependent Claim
12 words
The process set forth in claim 34, wherein said olefin is ethylene.
Claim 42
Dependent Claim
12 words
The process set forth in claim 35, wherein said olefin is ethylene.
Claim 43
Dependent Claim
14 words
The process set forth in claim 37, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 44
Dependent Claim
14 words
The process set forth in claim 37, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 45
Dependent Claim
86 words
In an article of manufacture consisting essentially of a polymer alloy composition and selected from the group consisting of a blown film and an injection molding, the improvement comprising said polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate.
Claim 46
Dependent Claim
86 words
In an article of manufacture consisting essentially of a polymer alloy composition and selected from the group consisting of a blown film and an injection molding, the improvement comprising said polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate.
Claim 47
Dependent Claim
20 words
The article of manufacture set forth in claim 41, wherein said copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 48
Dependent Claim
20 words
The article of manufacture set forth in claim 41, wherein said copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 49
Dependent Claim
18 words
The article of manufacture set forth in claim 41, wherein said copolymer comprises an olefin and vinyl acetate.
Claim 50
Dependent Claim
14 words
The article of manufacture set forth in claim 42, wherein said olefin is ethylene.
Claim 51
Dependent Claim
14 words
The article of manufacture set forth in claim 43, wherein said olefin is ethylene.
Claim 52
Dependent Claim
14 words
The article of manufacture set forth in claim 44, wherein said olefin is ethylene.
Claim 53
Dependent Claim
16 words
The article of manufacture set forth in claim 45, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 54
Dependent Claim
16 words
The article of manufacture set forth in claim 45, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 55
Dependent Claim
139 words
In an article of manufacture consisting essentially of a polymer alloy composition and selected from the group consisting of a blown film and an injection molding, the improvement comprising said polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, (b) a first copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive.
Claim 56
Dependent Claim
139 words
In an article of manufacture consisting essentially of a polymer alloy composition and selected from the group consisting of a blown film and an injection molding, the improvement comprising said polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, (b) a first copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer selected from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive.
Claim 57
Dependent Claim
14 words
The article of manufacture set forth in claim 50, wherein said polyolefin is polyethylene.
Claim 58
Dependent Claim
14 words
The article of manufacture set forth in claim 50, wherein said polyolefin is polypropylene.
Claim 59
Dependent Claim
14 words
The article of manufacture set forth in claim 50, wherein said polyolefin is polyisobutylene.
Claim 60
Dependent Claim
21 words
The article of manufacture set forth in claim 50, wherein said first copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 61
Dependent Claim
21 words
The article of manufacture set forth in claim 50, wherein said first copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 62
Dependent Claim
19 words
The article of manufacture set forth in claim 50, wherein said first copolymer comprises an olefin and vinyl acetate.
Claim 63
Dependent Claim
14 words
The article of manufacture set forth in claim 54, wherein said olefin is ethylene.
Claim 64
Dependent Claim
14 words
The article of manufacture set forth in claim 55, wherein said olefin is ethylene.
Claim 65
Dependent Claim
16 words
The article of manufacture set forth in claim 57, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 66
Dependent Claim
16 words
The article of manufacture set forth in claim 57, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 67
Dependent Claim
57 words
A polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate.
Claim 68
Dependent Claim
57 words
A polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, and (b) a copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate.
Claim 69
Dependent Claim
18 words
The composition set forth in claim 61, wherein said copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 70
Dependent Claim
18 words
The composition set forth in claim 61, wherein said copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 71
Dependent Claim
16 words
The composition set forth in claim 61, wherein said copolymer comprises an olefin and vinyl acetate.
Claim 72
Dependent Claim
12 words
The composition set forth in claim 62, wherein said olefin is ethylene.
Claim 73
Dependent Claim
12 words
The composition set forth in claim 63, wherein said olefin is ethylene.
Claim 74
Dependent Claim
12 words
The composition set forth in claim 64, wherein said olefin is ethylene.
Claim 75
Dependent Claim
14 words
The composition set forth in claim 65, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 76
Dependent Claim
14 words
The composition set forth in claim 65, wherein said C 1-6 alkylacrylate is ethylacrylate.
Claim 77
Dependent Claim
109 words
A polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, (b) a first copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive.
Claim 78
Dependent Claim
109 words
A polymer alloy composition consisting of an admixture of: (a) starch which has been neither destructurized nor gelatinized, (b) a first copolymer consisting essentially of an olefin of from about two to about four carbon atoms, inclusive, and a comonomer selected from the group consisting of a C 1-6 alkylacrylate, a C 1-6 alkylmethacrylate, and vinyl acetate, and (c) a polyolefin of from about two to about four carbon atoms or a second copolymer from the group consisting of ethylene and propylene, ethylene and other alpha olefins of from four to eight carbon atoms, inclusive, and propylene and other alpha olefins of from four to eight carbon atoms, inclusive.
Claim 79
Dependent Claim
12 words
The composition set forth in claim 70, wherein said polyolefin is polyethylene.
Claim 80
Dependent Claim
12 words
The composition set forth in claim 70, wherein said polyolefin is polypropylene.
Claim 81
Dependent Claim
12 words
The composition set forth in claim 70, wherein said polyolefin is polyisobutylene.
Claim 82
Dependent Claim
19 words
The composition set forth in claim 70, wherein said first copolymer comprises an olefin and a C 1-6 alkylacrylate.
Claim 83
Dependent Claim
19 words
The composition set forth in claim 70, wherein said first copolymer comprises an olefin and a C 1-6 alkylmethacrylate.
Claim 84
Dependent Claim
17 words
The composition set forth in claim 70, wherein said first copolymer comprises an olefin and vinyl acetate.
Claim 85
Dependent Claim
12 words
The composition set forth in claim 74, wherein said olefin is ethylene.
Claim 86
Dependent Claim
12 words
The composition set forth in claim 75, wherein said olefin is ethylene.
Claim 87
Dependent Claim
14 words
The composition set forth in claim 77, wherein said C 1-6 alkylacrylate is methylacrylate.
Claim 88
Dependent Claim
14 words
The composition set forth in claim 77, wherein said C 1-6 alkylacrylate is ethylacrylate.
References Cited (Backward Citations)
US2953551A
Cited
US3454510A
Cited
JPS50101442A
Cited
US4133784A
Cited
US4337181A
Cited
US4454268A
Cited
EP0327505A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |