US4753989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer with improved high temperature characteristics
Assignee: Hutchinson Aerospace and Industry Inc
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Filing: 1987-03-25
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Granted: 1988-06-28
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Expires: 2007-03-25
Abstract
Abstract A soft thermoplastic, elastomeric alloy containing a thermoplastic, elastomeric block copolymer material, a polyethylene, and a polyphenylene ether material, prepared by blending in an extruder with an L/D ratio equal to or greater than 30 to 1. The alloy comprises a blend of from about 80 to 98% thermoplastic, elastomeric block copolymer material; from about 1 to 10% by weight of low melt index, highly crystalline polyethylene; and from about 1 to 10% by weight of polyphenylene ether. The material demonstrates excellent creep resistance at elevated temperatures as well as a variety of other excellent physical properties.
Inventors
- 👤 John A. Hudson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:39
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A thermoplastic, elastomeric alloy, comprising: (a) from about 80 to 98% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) from about 1 to 10% by weight of low melt index, cystalline polyethylene; and, (c) from about 1 to 10% polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 2
Dependent Claim
54 words
A thermoplastic, elastomeric alloy, comprising: (a) from about 80 to 98% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) from about 1 to 10% by weight of low melt index, cystalline polyethylene; and, (c) from about 1 to 10% polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 3
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 94% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 3% by weight of low melt index, crystalline polyethylene; and, (c) approximately 3% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 4
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 94% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 3% by weight of low melt index, crystalline polyethylene; and, (c) approximately 3% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 5
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 96% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 2% by weight of low melt index crystalline polyethylene; and, (c) approximately 2% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 6
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 96% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 2% by weight of low melt index crystalline polyethylene; and, (c) approximately 2% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 7
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 92% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 2% by weight of low melt index crystalline polyethylene; and, (c) approximately 6% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 8
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 92% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 2% by weight of low melt index crystalline polyethylene; and, (c) approximately 6% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 9
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 87% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 5% by weight of low melt index crystalline polyethylene; and, (c) approximately 8% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
Claim 10
Dependent Claim
48 words
A thermoplastic, elastomeric alloy comprising: (a) approximately 87% by weight of styrene-ethylene-butylene-styrene block copolymer; (b) approximately 5% by weight of low melt index crystalline polyethylene; and, (c) approximately 8% by weight of polyphenylene ether; said elastomeric alloy having a Shore A hardness of approximately 32 to approximately 45A.
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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) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |