US5059642A
Expired / Lapsed
US
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Degradable plastics from octenyl succinate starch
Assignee: Iowa State University Research Foundation Inc
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Filing: 1989-09-14
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Granted: 1991-10-22
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Expires: 2009-09-14
Abstract
Abstract A plastic and method of producing the same is disclosed where octenyl succinate starch metal ion complexes is combined with a plastic having hydrophobic tendencies. Preferred conditions of mixing are 165° C. to 185° C. temperature, with mixing occurring at 40 rpm to 60 rpm for 30 to 50 minutes.
Inventors
- 👤 Jay-lin Jane
- 👤 Robert J. Gelina
- 👤 Zivko Nikolov
- 👤 Roque L. Evangelista
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L3/00; C08L3/04; C08L3/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
45 words
A degradable, high tensile strength plastic comprising from about 6% by weight to about 50% by weight of an octenyl succinate starch metal ion complexes and the balance comprising a plastic having hydrophobic tendencies selected from the group consisting of polyethylene, polypropylene, polystyrene and polyvinylchloride.
Claim 2
Dependent Claim
45 words
A degradable, high tensile strength plastic comprising from about 6% by weight to about 50% by weight of an octenyl succinate starch metal ion complexes and the balance comprising a plastic having hydrophobic tendencies selected from the group consisting of polyethylene, polypropylene, polystyrene and polyvinylchloride.
Claim 3
Dependent Claim
12 words
The degradable plastic of claim 1 wherein said starch is corn starch.
Claim 4
Dependent Claim
19 words
The degradable plastic of claim 1 wherein said plastic is selected from the group consisting of polyethylene and polystyrene.
Claim 5
Dependent Claim
23 words
The degradable plastic of claim 1 wherein metal ions in said complexes are selected from the group consisting of aluminum and transition metals.
Claim 6
Dependent Claim
23 words
The degradable plastic of claim 1 wherein said octenyl succinate starch comprises 7% by weight to 15% by weight of said total composition.
Claim 7
Dependent Claim
29 words
The degradable plastic of claim 1 wherein said degradable plastic is formed by mixing said octenyl succinate starch and said hydrophobic plastic for 10 minutes up to 50 minutes.
Claim 8
Dependent Claim
32 words
The degradable plastic of claim 1 wherein said degradable plastic is formed by mixing said octenyl succinate starch and said hydrophobic plastic at a rate of 20 rpm up to 60 rpm.
Claim 9
Dependent Claim
34 words
The biodegradable plastic of claim 1 wherein said biodegradable plastic is formed by mixing said octenyl succinate starch aluminum complex and said hydrophobic plastic at a temperature of 145° C. up to 205° C.
Claim 10
Dependent Claim
52 words
A degradable, high tensile strength plastic comprising: octenyl succinate starch metal ion complex comprising from 6% to about 50 T of said degradable plastic; said octenyl succinate starch derived from corn starch of about 5 microns in size or less; and a plastic selected from the group consisting of polyethylene and polystyrene.
Claim 11
Dependent Claim
52 words
A degradable, high tensile strength plastic comprising: octenyl succinate starch metal ion complex comprising from 6% to about 50 T of said degradable plastic; said octenyl succinate starch derived from corn starch of about 5 microns in size or less; and a plastic selected from the group consisting of polyethylene and polystyrene.
Claim 12
Independent Claim
41 words
A method of producing degradable, high tensile strength plastic comprising: mixing octenyl succinate starch metal ion complex with a plastic having hydrophobic properties; said mixing occurring for a time and at a rate which increase the tensile strength of the plastic.
Claim 13
Independent Claim
41 words
A method of producing degradable, high tensile strength plastic comprising: mixing octenyl succinate starch metal ion complex with a plastic having hydrophobic properties; said mixing occurring for a time and at a rate which increase the tensile strength of the plastic.
Claim 14
Dependent Claim
23 words
The method of claim 10 further comprising deriving said octenyl succinate starch from small grain starch about 5 microns in size or less.
Claim 15
Dependent Claim
18 words
The method of claim 10 wherein said plastic is selected from the group consisting of polyethylene and polystyrene.
Claim 16
Dependent Claim
31 words
The method of claim 10 wherein said octenyl succinate starch and said plastic is mixed so that said starch comprises 6% by weight to 50% by weight of said degradable plastic.
Claim 17
Dependent Claim
32 words
The method of claim 13 wherein said octenyl succinate starch and said plastic is mixed so that said starch comprises 7% by weight up to 15% by weight of said degradable plastic.
Claim 18
Dependent Claim
21 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed for 10 minutes to 50 minutes.
Claim 19
Dependent Claim
18 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed for 30 minutes.
Claim 20
Dependent Claim
25 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed at a rate of 20 rpm up to 60 rpm.
Claim 21
Dependent Claim
21 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed at a rate of 40 rpm.
Claim 22
Dependent Claim
25 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed at a temperature of 145° C. up to 205° C.
Claim 23
Dependent Claim
21 words
The method of claim 10 wherein said octenyl succinate starch and said plastic are mixed at a temperature of 185° C.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
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