US4952629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester blends
Assignee: Plastics Engineering Co
•
Filing: 1988-12-07
•
Granted: 1990-08-28
•
Expires: 2008-12-07
Abstract
Abstract A polymer blend of superior impact resistance comprises an intimate blend of a polyalkylene terephthalate resin, a polyesteramide and an impact resistance booster which is an elastomeric block copolymer. The preferred impact resistance booster is a block copolymer which has been modified with maleic acid anhydride.
Inventors
- 👤 Yeon F. Liang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A polymer blend of improved impact resistance comprising: (a) about 100 parts by weight of a polyethylene terephthalate; (b) at least about 10 to about 25 parts by weight of a linear segmented thermoplastic polyesteramide; and (c) about 5 parts by weight of a block copolymer selected from a styrene/ethylene butylene/styrene triblock copolymer and a styrene/ethylene-butylene/styrene maleic anhydride functionalized triblock copolymer; said blend containing about 20 to 25 parts by weight of the polyesteramide when the block copolymer is a styrene/ethylene-butylene/styrene triblock copolymer and about 10 to about 25 parts by weight of said polyesteramide when the block copolymer is a styrene/ethylene-butylene/styrene maleic anhydride triblock copolymer.
Claim 2
Dependent Claim
106 words
A polymer blend of improved impact resistance comprising: (a) about 100 parts by weight of a polyethylene terephthalate; (b) at least about 10 to about 25 parts by weight of a linear segmented thermoplastic polyesteramide; and (c) about 5 parts by weight of a block copolymer selected from a styrene/ethylene butylene/styrene triblock copolymer and a styrene/ethylene-butylene/styrene maleic anhydride functionalized triblock copolymer; said blend containing about 20 to 25 parts by weight of the polyesteramide when the block copolymer is a styrene/ethylene-butylene/styrene triblock copolymer and about 10 to about 25 parts by weight of said polyesteramide when the block copolymer is a styrene/ethylene-butylene/styrene maleic anhydride triblock copolymer.
Claim 3
Dependent Claim
50 words
A polymer blend of improved impact resistance comprising: (a) about 100 parts by weight of a polybutylene terephthalate; (b) at least about 5 to about 15 parts by weight of a linear segmented thermoplastic polyesteramide; and (c) about 5 parts by weight of a styrene/ethylene-butylene/styrene maleic anhydride functionalized triblock copolymer.
Claim 4
Dependent Claim
50 words
A polymer blend of improved impact resistance comprising: (a) about 100 parts by weight of a polybutylene terephthalate; (b) at least about 5 to about 15 parts by weight of a linear segmented thermoplastic polyesteramide; and (c) about 5 parts by weight of a styrene/ethylene-butylene/styrene maleic anhydride functionalized triblock copolymer.
References Cited (Backward Citations)
US4090996A
Cited
US4467057A
Cited
US4220735A
Cited
US4243575A
Cited
US4657970A
Cited
US4657970B1
Cited
US4491649A
Cited
US4547547A
Cited
US4578429A
Cited
US4797447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |