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Patent US4946896A successfully refreshed from Google Patents.
US4946896A
Expired / Lapsed
US
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Thermoplastic elastomer composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1988-11-01
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Granted: 1990-08-07
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Expires: 2008-11-01
Abstract
Abstract There is provided a thermoplastic elastomer composition having excellent surface processabilities such as adhesion, paintability and printability together with impact resistance. This composition comprises (A) 20-80% by weight of a polypropylene resin, (B) 5-38% by weight of an ethylene copolymer having 82-98.7 mol % of an ethylene unit, 1-15 mol % of an ester unit selected from alkyl acrylate and methacrylate having an alkyl group of 1-8 carbon atoms and 0.3-3 mol % of an unsaturated dicarboxylic acid anhydride unit and (C) 5-70% by weight of ethylene-propylene and/or ethylene-propylene-non-conjugated diene copolymer rubber which contain 50-85 mol % of an ethylene unit and have a Mooney viscosity at 100 DEG C. of 20-100 and an iodine value of 20 or less.
Inventors
- 👤 Tatsuyuki Mitsuno
- 👤 Hideo Shinonaga
- 👤 Akio Daimon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16; B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5254; C08L2205/00; C08L2205/03; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L2312/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
115 words
A thermoplastic elastomer composition which comprises (A) 20-80% by weight of a polypropylene resin, (B) 5-38% by weight of an ethylene copolymer having 82-98.7 mol % of an ethylene unit, 1-15 mol % of an ester unit selected from the group consisting of alkyl acrylate and alkyl methacrylate containing an alkyl group of 1-8 carbon atoms and 0.3-3 mol % of an unsaturated dicarboxylic acid anhydride unit and (C) 10-70% by weight of at least one of an ethylenepropylene copolymer rubber and an ethylene-propylene-nonconjugated diene copolymer rubber which contain 50-85 mol % of an ethylene unit and have a Mooney viscosity (ML 1+4 100° C.) of 20-100 and an iodine value of 20 or less.
Claim 2
Dependent Claim
115 words
A thermoplastic elastomer composition which comprises (A) 20-80% by weight of a polypropylene resin, (B) 5-38% by weight of an ethylene copolymer having 82-98.7 mol % of an ethylene unit, 1-15 mol % of an ester unit selected from the group consisting of alkyl acrylate and alkyl methacrylate containing an alkyl group of 1-8 carbon atoms and 0.3-3 mol % of an unsaturated dicarboxylic acid anhydride unit and (C) 10-70% by weight of at least one of an ethylenepropylene copolymer rubber and an ethylene-propylene-nonconjugated diene copolymer rubber which contain 50-85 mol % of an ethylene unit and have a Mooney viscosity (ML 1+4 100° C.) of 20-100 and an iodine value of 20 or less.
Claim 3
Dependent Claim
31 words
A thermoplastic elastomer composition according to claim 1 wherein the polypropylene resin is at least one member selected from crystalline polypropylene, crystalline propylene-ethylene block and random copolymers and crystalline propylene-α-olefin copolymers.
Claim 4
Dependent Claim
20 words
A thermoplastic elastomer composition according to claim 1 wherein the polypropylene resin has a melt index (JIS K6758) of 0.5-100.
Claim 5
Dependent Claim
37 words
A thermoplastic elastomer composition according to claim 1 wherein the ester unit contained in the ethylene copolymer is a monomer selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate and butyl methacrylate.
Claim 6
Dependent Claim
29 words
A thermoplastic elastomer composition according to claim 1 wherein the unsaturated dicarboxylic acid anhydride unit is a monomer selected from maleic anhydride, citraconic anhydride, itaconic anhydride and tetrahydrophthalic anhydride.
Claim 7
Dependent Claim
17 words
A thermoplastic elastomer composition according to claim 5 wherein the unsaturated dicarboxylic acid anhydride is maleic anhydride.
Claim 8
Dependent Claim
20 words
A thermoplastic elastomer composition according to claim 1 wherein the ethylene copolymer has a melt index (JIS K6760) of 0.5-300.
Claim 9
Dependent Claim
24 words
A thermoplastic elastomer composition according to claim 1 wherein the ethylene-propylene copolymer rubber and ethylene-propylene-non-conjugated diene copolymer rubber is crosslinked with an organic peroxide.
Claim 10
Dependent Claim
22 words
A thermoplastic elastomer composition according to claim 1 wherein the non-conjugated diene is selected from methyltetrahydroindene, 5-vinylnorbornene, 5-ethylidene-2-norbornene, dicyclopentadiene, 1,4-hexadiene and 1,6-octadiene.
Claim 11
Dependent Claim
12 words
A molded product prepared from the composition as defined in claim 1.
Claim 12
Dependent Claim
18 words
A molded product comprising a part for an automobile prepared from the composition as defined in 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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |