US5371141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact resistant blends of thermoplastic polyamides and modified block copolymers
Assignee: Kraton Polymers US LLC
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Filing: 1992-04-02
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Granted: 1994-12-06
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Expires: 2012-04-02
Abstract
Abstract A super-toughened multiphase thermoplastic composition is provided by combining at least one modified selectively hydrogenated conjugated diene/alkenyl arene block copolymer to which has been grafted an effective amount of succinic groups primarily in the selectively hydrogenated conjugated diene blocks thereof and optionally at least one unmodified selectively hydrogenated conjugated diene/alkenyl arene block copolymer with at least one α,ω-polyamide.
Inventors
- 👤 Richard Gelles
- 👤 William P. Gergen
- 👤 Robert G. Lutz
- 👤 Michael J. Modic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L77/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A polymer composition, comprising: 80% by weight of a linear nylon 6,6 polyamide having a number average molecular weight of at least 5,000 and a melting point in excess of 200° C.; 20% by weight of a 1:1 blend of an unmodified styrene-hydrogenated butadiene-styrene block copolymer containing 29% by weight of the styrene and a modified styrene-hydrogenated butadiene-styrene block copolymer containing 29% by weight of the styrene and having maleic anhydride groups grafted to the hydrogenated butadiene blocks in an amount of 1.6% by weight of the modified block copolymer; and an 1/8" Notched Izod impact strength of 22.9 ft.-lb/in at room temperature.
Claim 2
Dependent Claim
103 words
A polymer composition, comprising: 80% by weight of a linear nylon 6,6 polyamide having a number average molecular weight of at least 5,000 and a melting point in excess of 200° C.; 20% by weight of a 1:1 blend of an unmodified styrene-hydrogenated butadiene-styrene block copolymer containing 29% by weight of the styrene and a modified styrene-hydrogenated butadiene-styrene block copolymer containing 29% by weight of the styrene and having maleic anhydride groups grafted to the hydrogenated butadiene blocks in an amount of 1.6% by weight of the modified block copolymer; and an 1/8" Notched Izod impact strength of 22.9 ft.-lb/in at room temperature.
Claim 3
Dependent Claim
30 words
The polymer composition of claim 1, wherein the modified block copolymer and the unmodified block copolymer have the same structure before maleic anhydride is grafted to the modified block copolymer.
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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) | 1997-12-05 | 1998-06-06 | 1998-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-05 | 2002-06-06 | 2002-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-05 | 2006-06-06 | 2006-12-06 | $7700.00 | Window Closed / Lapsed |