US4722973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elastomer composition
Assignee: Eneos Corp
•
Filing: 1986-04-02
•
Granted: 1988-02-02
•
Expires: 2006-04-02
Abstract
Abstract This invention provides a thermoplastic elastomer composition obtained by blending (A) a hard segment comprising a low-density ethylene- alpha -olefin copolymer formed by copolymerizing ethylene with an alpha -olefin by the use of a specific catalyst and characterized by specifically defined properties and (B) a soft segment comprising an ethylene- alpha -olefin copolymer rubber, or obtained by partial cross-linking of the resulting blend. This elastomer composition has characteristic features such as high flexibility, good fluidity, excellent tensile properties, good thermal resistance and oil resistance and low permanent strain.
Inventors
- 👤 Noboru Yamaoka
- 👤 Kiyoyasu Tanabe
- 👤 Katumi Usui
- 👤 Takashi Mizoe
- 👤 Kazuo Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/13; C08K5/134; C08K5/1345; C08K5/14; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A thermoplastic elastomer composition comprising (A) 25 to 75% by weight of an ethylene-α-olefin copolymer formed by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst consisting of (1) a solid component containing at least magnesium and titanium, and (2) an organoaluminum compound, said ethylene-α-olefin copolymer being characterized by (I) a melt index of 0.01 to 100 g/10 min, (II) a density of 0.870 to 0.900 g/cm 3 , (III) a maximum peak temperature of not lower than 100° C. as measured by differential scanning calorimetry (DSC), and (IV) a boiling-n-hexane-insoluble fraction of not less than 10% by weight; and (B) 75 to 25% by weight of an ethylene-α-olefin copolymer rubber having a maximum peak temperature, if any, as measured by DSC of at most 60° to 70° C. and having no or very little boiling -n- hexane-insoluble fraction.
Claim 2
Dependent Claim
147 words
A thermoplastic elastomer composition comprising (A) 25 to 75% by weight of an ethylene-α-olefin copolymer formed by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst consisting of (1) a solid component containing at least magnesium and titanium, and (2) an organoaluminum compound, said ethylene-α-olefin copolymer being characterized by (I) a melt index of 0.01 to 100 g/10 min, (II) a density of 0.870 to 0.900 g/cm 3 , (III) a maximum peak temperature of not lower than 100° C. as measured by differential scanning calorimetry (DSC), and (IV) a boiling-n-hexane-insoluble fraction of not less than 10% by weight; and (B) 75 to 25% by weight of an ethylene-α-olefin copolymer rubber having a maximum peak temperature, if any, as measured by DSC of at most 60° to 70° C. and having no or very little boiling -n- hexane-insoluble fraction.
Claim 3
Dependent Claim
25 words
A thermoplastic elastomer composition as claimed in claim 1 wherein said ethylene-α-olefin copolymer (A) is formed from an α-olefin having 3 to 6 carbon atoms.
Claim 4
Dependent Claim
23 words
A thermoplastic elastomer composition as claimed in claim 1 wherein said ethylene-α-olefin copolymer (A) contains 5 to 40 mole % of said α-olefin.
Claim 5
Dependent Claim
23 words
A thermoplastic elastomer composition as claimed in claim 1 wherein said ethylene-α-olefin copolymer rubber (B) has a Mooney viscosity of 10 to 120.
Claim 6
Dependent Claim
151 words
A thermoplastic elastomer composition obtained by partial cross-linking of a blend comprising (A) 25 to 75% by weight of an ethylene-α-olefin copolymer formed by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in the presence of catalyst consisting of (1) a solid component containing at least magnesium and titanium, and (2) an organoaluminum compound, said ethylene-α-olefin copolymer being characterized by (I) a melt index of 0.01 to 100 g/10 min, (II) a density of 0.870 to 0.900 g/cm 3 , (III) a maximum peak temperature of not lower than 100° C. as measured by differential scanning calorimetry (DSC), and (IV) a boiling-n-hexane-insoluble fraction of not less than 10% by weight; and (B) 75 to 25% by weight of an ethylene-α-olefin copolymer rubber having a maximum peak temperature, if any, as measured by DSC of at most 60° to 70° C. and having no or very little boiling-n-hexane-insoluble fraction.
Claim 7
Dependent Claim
151 words
A thermoplastic elastomer composition obtained by partial cross-linking of a blend comprising (A) 25 to 75% by weight of an ethylene-α-olefin copolymer formed by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in the presence of catalyst consisting of (1) a solid component containing at least magnesium and titanium, and (2) an organoaluminum compound, said ethylene-α-olefin copolymer being characterized by (I) a melt index of 0.01 to 100 g/10 min, (II) a density of 0.870 to 0.900 g/cm 3 , (III) a maximum peak temperature of not lower than 100° C. as measured by differential scanning calorimetry (DSC), and (IV) a boiling-n-hexane-insoluble fraction of not less than 10% by weight; and (B) 75 to 25% by weight of an ethylene-α-olefin copolymer rubber having a maximum peak temperature, if any, as measured by DSC of at most 60° to 70° C. and having no or very little boiling-n-hexane-insoluble fraction.
Claim 8
Dependent Claim
25 words
A thermoplastic elastomer composition as claimed in claim 5 wherein said ethylene-α-olefin copolymer (A) is formed from an α-olefin having 3 to 6 carbon atoms.
Claim 9
Dependent Claim
23 words
A thermoplastic elastomer composition as claimed in claim 5 wherein said ethylene-α-olefin copolymer (A) contains 5 to 40 mole % of said α-olefin.
Claim 10
Dependent Claim
23 words
A thermoplastic elastomer composition as claimed in claim 5 wherein said ethylene-α-olefin copolymer rubber (B) has a Mooney viscosity of 10 to 120.
Claim 11
Dependent Claim
32 words
A thermoplastic elastomer composition as claimed in claim 5 wherein said blend is partially cross-linked by the addition of a cross-linking agent comprising 0.005 to 3% by weight of an organic peroxide.
References Cited (Backward Citations)
US3806558A
Cited
JPS5239741A
Cited
US4576993A
Cited
GB2077273A
Cited
US4429079A
Cited
JPS5759943A
Cited
US4426498A
Cited
JPS582339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |