US4803237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced polyester molding compositions
Assignee: Eastman Chemical Co
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Filing: 1988-02-22
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Granted: 1989-02-07
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Expires: 2008-02-22
Abstract
Abstract Disclosed are reinforced polyester molding compositions comprising poly(ethylene terephthalate), glass fibers, at least one sodium or potassium salt of a hydrocarbon carboxylic acid or an ionic hydrocarbon copolymer of an α-olefin, an α,β-ethylenically unsaturated carboxylic acid and a primary linear polymeric alcohol having the structure CH 3 (CH 2 ) x CH 2 OH where x has an average value of 28-48.
Inventors
- 👤 Ronald R. Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/05; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A reinforced polyester molding composition comprising (a) poly(ethylene terephthalate) having an I.V. of about 0.4-1.0 dl/g, (b) about 10-60% by weight of the composition of glass fibers, (c) about 1.0-5.0% by weight of the composition of at least one sodium or potassium salt of a hydrocarbon carboxylic acid of 7-25 carbon atoms or at least one sodium or potassium salt of an ionic hydrocarbon copolymer of an α-olefin of 2-5 carbon atoms and an α,β-ethylenically unsaturated carboxylic acid of 3-5 carbon atoms in which the carboxyl groups have been at least partially neutralized with Na + or K + cations, and (d) about 0.5-10% by weight of the composition of a primary linear polymeric alcohol having the structure CH 3 (CH 2 ) x CH 2 OH where x has an average value of 28-48.
Claim 2
Dependent Claim
135 words
A reinforced polyester molding composition comprising (a) poly(ethylene terephthalate) having an I.V. of about 0.4-1.0 dl/g, (b) about 10-60% by weight of the composition of glass fibers, (c) about 1.0-5.0% by weight of the composition of at least one sodium or potassium salt of a hydrocarbon carboxylic acid of 7-25 carbon atoms or at least one sodium or potassium salt of an ionic hydrocarbon copolymer of an α-olefin of 2-5 carbon atoms and an α,β-ethylenically unsaturated carboxylic acid of 3-5 carbon atoms in which the carboxyl groups have been at least partially neutralized with Na + or K + cations, and (d) about 0.5-10% by weight of the composition of a primary linear polymeric alcohol having the structure CH 3 (CH 2 ) x CH 2 OH where x has an average value of 28-48.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein said alcohol is present in an amount of about 1-5% based on the total composition weight.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 wherein said sodium or potassium salt is the sodium salt of ethylene/methacrylic acid copolymer.
Claim 5
Dependent Claim
9 words
A molded article of the composition of claim 1.
References Cited (Backward Citations)
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |