US4220735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyester compositions
Assignee: General Electric Co
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Filing: 1978-12-18
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Granted: 1980-09-02
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Expires: 1998-12-18
Abstract
Abstract Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin in combination with a poly(ethylene terephthalate) resin and/or a polyester copolymer and (b) a modifier therefor comprising a combination of a selectively hydrogenated monoalkenyl arene-diene block copolymer resin and an aromatic polycarbonate. The compositions can include (c) reinforcing glass fibers and/or (d) a flame retardant. Modifier (b) provides enhanced resistance to impact fracture, increased strength and improved resistance to heat distortion in articles molded from the compositions.
Inventors
- 👤 Ronald L. Dieck
- 👤 Allen D. Wambach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a blend of a poly(1,4-butylene terephthalate) resin and a poly(ethylene terephthalate) resin; (ii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iii) a blend of (ii) and a poly(ethylene terephthalate) resin; or (iv) a blend of (ii) and a poly(1,4-butylene terephthalate) resin; (b) an impact modifier therefor comprising a combination of: (i) a selectively hydrogenated monoalkenyl arene-diene block copolymer resin; and (ii) an aromatic polycarbonate resin, in an amount of from at least about 1.0 up to 60 parts per 100 parts by weight of (a) and (b) together.
Claim 2
Dependent Claim
103 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a blend of a poly(1,4-butylene terephthalate) resin and a poly(ethylene terephthalate) resin; (ii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iii) a blend of (ii) and a poly(ethylene terephthalate) resin; or (iv) a blend of (ii) and a poly(1,4-butylene terephthalate) resin; (b) an impact modifier therefor comprising a combination of: (i) a selectively hydrogenated monoalkenyl arene-diene block copolymer resin; and (ii) an aromatic polycarbonate resin, in an amount of from at least about 1.0 up to 60 parts per 100 parts by weight of (a) and (b) together.
Claim 3
Dependent Claim
36 words
A composition as defined in claim 1 wherein the modifier (b) is present in an amount of from about 2.5 to about 50 parts by weight per 100 parts by weight of (a) and (b) together.
Claim 4
Dependent Claim
40 words
A composition as defined in claim 1 wherein each said polyester in component (a) has an intrinsic viscosity of at least about 0.4 deciliters/gram when measured in a solution in a 60:40 mixture of phenol and tetrachloroethane at 30° C.
Claim 5
Dependent Claim
42 words
A composition as defined in claim 3 wherein each said polyester in component (a) has an intrinsic viscosity of at least about 0.6 deciliters per gram when measured in a solution in a 60:40 mixture of phenol and tetrachloroethane at 30° C.
Claim 6
Dependent Claim
21 words
A composition as defined in claim 1 wherein in components (a)(i) and (a)(iv), said poly(1,4-butylene terephthalate) resin is linear or branched.
Claim 7
Dependent Claim
35 words
A composition as defined in claim 5 wherein said branched polyester is a high melt viscosity (1,4-butylene terephthalate) resin which includes a small amount of a branching component containing at least three ester forming groups.
Claim 8
Dependent Claim
28 words
A composition as defined in claim 1 wherein in said block copolymer resin component (b)(i), the monoalkenyl arene is styrene and the conjugated diene is butadiene or isoprene.
Claim 9
Dependent Claim
16 words
A composition as defined in claim 7 wherein said block copolymer has a ABA linear structure.
Claim 10
Dependent Claim
32 words
A composition as defined in claim 8 wherein said block copolymer is a selectively hydrogenated block copolymer of styrene and butadiene, said butadiene having a 1,2-content of between about 35% and 55%.
Claim 11
Dependent Claim
17 words
A composition as defined in claim 1 wherein said aromatic polycarbonate resin includes units derived from bisphenol-A.
Claim 12
Dependent Claim
90 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (ii) a blend of (i) and a poly(ethylene terephthalate) resin; or (iii) a blend of (i) and a poly(1,4-butylene terephthalate) resin; and (b) an impact modifier therefor comprising a combination of: (i) a selectively hydrogenated monoalkenyl arene-diene block copolymer resin; and (ii) an aromatic polycarbonate resin, in an amount of from at least 1.0 up to 60 parts per 100 parts by weight of (a) and (b) together.
Claim 13
Dependent Claim
90 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (ii) a blend of (i) and a poly(ethylene terephthalate) resin; or (iii) a blend of (i) and a poly(1,4-butylene terephthalate) resin; and (b) an impact modifier therefor comprising a combination of: (i) a selectively hydrogenated monoalkenyl arene-diene block copolymer resin; and (ii) an aromatic polycarbonate resin, in an amount of from at least 1.0 up to 60 parts per 100 parts by weight of (a) and (b) together.
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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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |