US4533679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced polyester composition having an improved strength
Assignee: Bayer Corp
•
Filing: 1982-06-28
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Granted: 1985-08-06
•
Expires: 2002-06-28
Abstract
Abstract The present invention is directed to a thermoplastic molding composition comprising a high molecular weight polyester, a reinforcing amount of a reinforcing agent and a polyepoxy compound characterized in that it contains more than two terminal epoxy functionalities per molecule.
Inventors
- 👤 Herbert L. Rawlings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:04
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K3/00; C08K3/34; C08K3/36; C08K3/40; C08L; C08L63/00; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A process for the preparation of a glass fiber reinforced thermoplastic polyethylene terephthalate composition comprising (i) applying a polyepoxy compound having more than two terminal epoxy functionalities per molecule to said glass fibers, said polyepoxy conforming to the general formula ##STR7## wherein R 1 denotes a hydrogen atom or an alkyl radical and R 2 is a polyvalent radical containing more than one additional terminal epoxide functionality and then (ii) incorporating the glass fibers of (i) in a thermoplastic polyethylene terephthalate resin, said polyepoxy being applied in sufficient amount to cause a reinforcing effect of said composition.
Claim 2
Dependent Claim
97 words
A process for the preparation of a glass fiber reinforced thermoplastic polyethylene terephthalate composition comprising (i) applying a polyepoxy compound having more than two terminal epoxy functionalities per molecule to said glass fibers, said polyepoxy conforming to the general formula ##STR7## wherein R 1 denotes a hydrogen atom or an alkyl radical and R 2 is a polyvalent radical containing more than one additional terminal epoxide functionality and then (ii) incorporating the glass fibers of (i) in a thermoplastic polyethylene terephthalate resin, said polyepoxy being applied in sufficient amount to cause a reinforcing effect of said composition.
References Cited (Backward Citations)
GB1111012A
Cited
US3368995A
Cited
US3560605A
Cited
US3632402A
Cited
US3547873A
Cited
GB1224684A
Cited
DE2042447A1
Cited
US3843615A
Cited
US3723568A
Cited
US3886104A
Cited
US4141882A
Cited
US4223113A
Cited
US4123415A
Cited
US4123415B1
Cited
US4222928A
Cited
GB2015014A
Cited
GB2015013A
Cited
US4215032A
Cited
US4229553A
Cited
US4246378A
Cited
US4212791A
Cited
US4284596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |