US4822855A
Expired / Lapsed
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Thermoplastic elastomer compositions
Assignee: Eneos Corp
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Filing: 1987-08-04
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Granted: 1989-04-18
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Expires: 2007-08-04
Abstract
Abstract A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B) and (C): (A) 30-70 parts by weight of an ethylene/ alpha -olefin copolymer prepared by copolymerizing ethylene and an alpha -olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/ alpha -olefin copolymer having the following properties (I) to (IV): - (I) Melt index 0.01-100 g/10 min - (II) Density 0.860-0.910 g/cm3 - (III) Maximum peak not lower than 100 DEG C. - temperature as measured - according to a - differential scanning - calorimetry (DSC) - (IV) Insolubles in boiling not less than 10 wt. % - n-hexane - (B) 70-30 parts by weight of a propylene polymer; and (C) 70-200 parts by weight, based on 100 parts by weight of the components (A) and (B), of an ethylene/ alpha -olefin copolymer rubber.
Inventors
- 👤 Seizo Kobayashi
- 👤 Katumi Usui
- 👤 Takashi Mizoe
- 👤 Noboru Yamaoka
- 👤 Kazuo Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:18
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/16; C08L2205/00; C08L2205/03; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/14; C08L23/142; C08L2312/00; C08L53/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B) and (C): (A) 30-70 parts by weight of an ethylene/α-olefin copolymer prepared by copolymerizing ethylene and an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/α-olefin copolymer having the following properties (I) to (IV): ______________________________________
(I) Melt index 0.01-100 g/10 min
(II) Density 0.870-0.905 g/cm.sup.3
(III) Maximum peak not lower than 100° C.
temperature as measured
according to a
differential scanning
calorimetry (DSC)
(IV) Insolubles in boiling
not less than 10 wt. %
n-hexane
______________________________________ (B) 70-30 parts by weight of a propylene polymer; and (C) 70-200 parts by weight, based on 100 parts by weight of the components (A) and (B), of an ethylene/α-olefin copolymer rubber.
Claim 2
Dependent Claim
146 words
A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B) and (C): (A) 30-70 parts by weight of an ethylene/α-olefin copolymer prepared by copolymerizing ethylene and an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/α-olefin copolymer having the following properties (I) to (IV): ______________________________________
(I) Melt index 0.01-100 g/10 min
(II) Density 0.870-0.905 g/cm.sup.3
(III) Maximum peak not lower than 100° C.
temperature as measured
according to a
differential scanning
calorimetry (DSC)
(IV) Insolubles in boiling
not less than 10 wt. %
n-hexane
______________________________________ (B) 70-30 parts by weight of a propylene polymer; and (C) 70-200 parts by weight, based on 100 parts by weight of the components (A) and (B), of an ethylene/α-olefin copolymer rubber.
Claim 3
Dependent Claim
27 words
A composition as set forth in claim 1, wherein the α-olefin content of the ethylene/α-olefin copolymer (A) is in the range of 5 to 40 mol %.
Claim 4
Dependent Claim
25 words
A composition as set forth in claim 1, wherein the α-olefin of the ethylene/α-olefin copolymer (A) is propylene, butene-1, 4-methylpentene-1, hexene-1, octene-1, decene-1, or dodecene-1.
Claim 5
Dependent Claim
32 words
A composition as set forth in claim 1, wherein the propylene polymer (B) is a homopolymer of propylene or a copolymer of propylene and an α-olefin having 2 to 8 carbon atoms.
Claim 6
Dependent Claim
30 words
A composition as set forth in claim 1, wherein the ethylene/α-olefin copolymer rubber (C) has a Mooney viscosity (ML 1+4 , 100° C.) in the range of 10 to 95.
Claim 7
Dependent Claim
18 words
A composition as set forth in claim 1, wherein the partial crosslinking is performed using an organic peroxide.
References Cited (Backward Citations)
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |