US4101502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of poly (butylene terephthalate)
Assignee: Hoechst Celanese Chemical Co
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Filing: 1977-04-01
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Granted: 1978-07-18
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Expires: 1997-04-01
Abstract
Abstract Compositions of matter comprising interpolymers of poly (butylene terephthalate) with ethylene/vinyl acetate copolymer, polyethylene or polypropylene and reinforced with between about 2 and about 60 wt. % glass fibers.
Inventors
- 👤 Ghazi Khattab
- 👤 Gerard P. Naviello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:13
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08G; C08G63/00; C08G81/00; C08G81/02; C08G81/024; C08G81/027; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A composition of matter comprising a blend of: a. between about 2 and about 60 wt% glass fibers, and b. between about 40 and 98 wt% of a graft copolymer of poly(butylene terephthalate) containing between about 0.1 wt% and about 3 wt% based on poly(butylene terephthalate) of 1,4-butenediol or 3-hexene-2,5-diol with polyethylene or polypropylene.
Claim 2
Dependent Claim
54 words
A composition of matter comprising a blend of: a. between about 2 and about 60 wt% glass fibers, and b. between about 40 and 98 wt% of a graft copolymer of poly(butylene terephthalate) containing between about 0.1 wt% and about 3 wt% based on poly(butylene terephthalate) of 1,4-butenediol or 3-hexene-2,5-diol with polyethylene or polypropylene.
Claim 3
Dependent Claim
20 words
A composition according to claim 1 in which the graft copolymer is a graft copolymer of poly(butylene terephthalate) with polyethylene.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 in which the graft copolymer is a graft copolymer of poly(butylene terephthalate) with polypropylene.
Claim 5
Dependent Claim
21 words
A composition according to claim 1 in which the poly(butylene terephthalate) contains between about 0.1 wt% and about 3 wt% 3-hexene-2,5-diol.
Claim 6
Dependent Claim
23 words
A composition according to claim 2 in which the polyethylene has a number average molecular weight of between about 24,000 and about 290,000.
Claim 7
Dependent Claim
27 words
A composition according to claim 1 in which the poly (butylene terephthalate) has an intrinsic viscosity between 0.2 and about 1.5 dl/g in O-chlorophenol at 25° C.
Claim 8
Dependent Claim
30 words
A composition according to claim 1 in which the graft copolymer is produced by first forming poly (butylene terephthalate) and then polymerizing the poly (butylene terephthalate) with, polyethylene or polypropylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |