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US4548988A
Expired / Lapsed
US
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Polymeric material consisting of a mixture of high-impact polystyrene, high-density polyethylene and a styrene/diene block copolymer
Assignee: Montefina SA
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Filing: 1983-08-31
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Granted: 1985-10-22
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Expires: 2003-08-31
Abstract
Abstract Thermoplastic material of high impact resistance, consisting of a homogeneous mixture of high-density polyethylene, high-impact polystyrene and of a styrene/diene block copolymer having a content in styrene below 50% by weight.
Inventors
- 👤 Jean Castelein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L53/00; C08L53/02; C08L53/025; C08L2205/00; C08L2205/03
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
Thermoplastic material having high-impact resistance even at a low temperature, consisting of a homogeneous mixture of, by weight based on the total weight, 40% to 50%, inclusive, of high density polyethylene; 50% to 40%, inclusive, of high-impact polystyrene, and about 10% inclusive, of a styrene/diene block copolymer, with three or more sequences, of the S-(D-S) n structure wherein n is a whole number or integer, S is a polystyrene block, D is an isoprenic block or hydrogenated butadienic block, with a content in styrene lower than 50% by weight.
Claim 2
Dependent Claim
89 words
Thermoplastic material having high-impact resistance even at a low temperature, consisting of a homogeneous mixture of, by weight based on the total weight, 40% to 50%, inclusive, of high density polyethylene; 50% to 40%, inclusive, of high-impact polystyrene, and about 10% inclusive, of a styrene/diene block copolymer, with three or more sequences, of the S-(D-S) n structure wherein n is a whole number or integer, S is a polystyrene block, D is an isoprenic block or hydrogenated butadienic block, with a content in styrene lower than 50% by weight.
Claim 3
Dependent Claim
17 words
Thermoplastic material according to claim 1, characterized in that in formula S-(D-S) n , n is 1.
References Cited (Backward Citations)
EP0004685A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |