US4883837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible blends of polyolefins with thermoplastic polyurethanes
Assignee: Dow Chemical Co
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Filing: 1988-06-24
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Granted: 1989-11-28
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Expires: 2008-06-24
Abstract
Abstract Disclosed are novel thermoplastic compatible compositions comprising a polyolefin, a thermoplastic polyurethane, and a compatibilizing amount of at least one modified polyolefin. The polymer blends are soft, flexible, resinous compositions of high tensile and tear strengths. The compositions overcome the barrier of incompatibility between polyethylene and thermoplastic polyurethanes.
Inventors
- 👤 Vincent S. Zabrocki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0869; C08L51/00; C08L51/06; C08L75/00; C08L75/04; C08L2205/00; C08L2205/03; C08L2205/035; C08L2207/00; C08L2207/06; C08L2207/066
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
87 words
A thermoplastic compatible blended composition comprising A. from about 15 to about 60 weight percent of a polyolefin, B. from about 30 to about 70 weight percent of a thermoplastic polyurethane, and C. from about 10 to about 35 weight percent of at least one modified polyolefin defined as a random, block or graft olefin copolymer having in a main or side chain thereof a functional group selected from the class consisting of carboxylic acid, carboxylate ester, carboxylic acid anhydride, carboxylate salts, amide, epoxy, hydroxy, and acyloxy.
Claim 2
Dependent Claim
87 words
A thermoplastic compatible blended composition comprising A. from about 15 to about 60 weight percent of a polyolefin, B. from about 30 to about 70 weight percent of a thermoplastic polyurethane, and C. from about 10 to about 35 weight percent of at least one modified polyolefin defined as a random, block or graft olefin copolymer having in a main or side chain thereof a functional group selected from the class consisting of carboxylic acid, carboxylate ester, carboxylic acid anhydride, carboxylate salts, amide, epoxy, hydroxy, and acyloxy.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein said polyolefin (A) comprises polyethylene.
Claim 4
Dependent Claim
24 words
A composition according to claim 2 wherein said polyethylene is selected from the group consisting of low density polyethylene and linear low density polyethylene.
Claim 5
Dependent Claim
30 words
A composition according to claim 1 wherein said thermoplastic polyurethane is derived from the reaction of an organic diisocyanate, at least one polymeric diol, and at least one difunctional extender.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein said at least one modified polyolefin is a modified polyethylene.
Claim 7
Dependent Claim
56 words
A composition according to claim 5 wherein said modified polyethylene comprises a copolymer or graft copolymer of ethylene or polyethylene respectively with at least one vinyl monomer having a functional group selected from the class consisting of carboxylic acid, carboxylate salts, dicarboxylic acid or anhydride thereof, carboxylate ester and acyloxy, or mixtures of said modified polyethylenes.
Claim 8
Dependent Claim
95 words
A thermoplastic compatible composition comprising on a 100 weight percent basis: A. from about 15 to about 60 percent linear low density polyethylene; B. from about 30 to about 70 percent of a polyurethane derived from the reaction of an organic diisocyanate, a polymeric diol; and a difunctional extender; and C. from about 10 to about 35 percent of a modified polyethylene selected from the group consisting of ethylene/vinyl acetate copolymer, ethylene/methylacrylate copolymer, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, ethylene/maleic anhydride graft copolymer, maleic anhydride grafted ethylene/vinyl acetate copolymer, and mixtures thereof in any combination.
Claim 9
Dependent Claim
95 words
A thermoplastic compatible composition comprising on a 100 weight percent basis: A. from about 15 to about 60 percent linear low density polyethylene; B. from about 30 to about 70 percent of a polyurethane derived from the reaction of an organic diisocyanate, a polymeric diol; and a difunctional extender; and C. from about 10 to about 35 percent of a modified polyethylene selected from the group consisting of ethylene/vinyl acetate copolymer, ethylene/methylacrylate copolymer, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, ethylene/maleic anhydride graft copolymer, maleic anhydride grafted ethylene/vinyl acetate copolymer, and mixtures thereof in any combination.
Claim 10
Dependent Claim
25 words
A composition according to claim 7 wherein said polyurethane (B) is derived from 4,4'-methylenebis(cyclohexyl isocyanate), a 2,000 molecular weight polyethyleneoxy capped polypropyleneoxy diol, and 1,4-butanediol.
Claim 11
Dependent Claim
27 words
A composition according to claim 8 wherein said (C) comprises a mixture of ethylene vinyl acetate copolymer, ethylene methacrylic acid copolymer, and ethylene maleic anhydride graft copolymer.
Claim 12
Dependent Claim
29 words
A composition according to claim 7 wherein said polyurethane (B) is derived from 4,4'-methylenebis(phenyl isocyanate), a blend of a 2,000 and 700 molecular weight polybutylene adipate diol, and 1,4-butanediol.
Claim 13
Dependent Claim
24 words
A composition according to claim 10 wherein said (C) comprises a mixture of ethylene/vinyl acetate copolymer, ethylene/methacrylic acid copolymer, and ethylene/maleic anhydride graft copolymer.
Claim 14
Dependent Claim
13 words
A composition according to claim 10 wherein said (C) comprises ethylene/vinyl acetate copolymer.
Claim 15
Dependent Claim
16 words
A composition according to claim 10 wherein said (C) comprises maleic anhydride grafted ethylene/vinyl acetate copolymer.
Claim 16
Dependent Claim
13 words
A composition according to claim 10 wherein said (C) comprises ethylene/acrylic acid copolymer.
Claim 17
Dependent Claim
20 words
A composition according to claim 10 wherein said (C) comprises a mixture of ethylene/vinyl acetate copolymer and ethylene/acrylic acid copolymer.
Claim 18
Dependent Claim
13 words
A film prepared from a thermoplastic compatible composition in accordance with claim 1.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |