Patent US4467057A successfully refreshed from Google Patents.
US4467057A
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Modified polyester composition
Assignee: General Electric Co
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Filing: 1983-05-13
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Granted: 1984-08-21
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Expires: 2003-05-13
Abstract
Abstract Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin or polyester copolymer and, optionally, a poly(ethylene terephthalate) resin (b) a modifier therefor comprising a combination of a selectively hydrogenation monoalkenyl arene-diene block copolymer resin and an aromatic polycarbonate, and (c) a mineral filler and, optionally, (d) a flame retardant. Modifier (b) and mineral filler (c) provide 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
2026-10-25 13:25
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 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; (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; and (c) an effective amount of a mineral filler therefor selected from the group consisting of clay, mica and talc.
Claim 2
Dependent Claim
110 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; (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; and (c) an effective amount of a mineral filler therefor selected from the group consisting of clay, mica and talc.
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
16 words
A composition as defined in claim 1 wherein the mineral filler (c) comprises calcined kaolin clay.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 4 wherein said clay filler is a silane coupling agent surface-treated clay.
Claim 6
Dependent Claim
37 words
A composition as defined in claim 1 wherein said mineral filler is present in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (c) together.
Claim 7
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 trichloroethane at 30° C.
Claim 8
Dependent Claim
42 words
A composition as defined in claim 6 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 trichloroethane at 30° C.
Claim 9
Dependent Claim
23 words
A composition as defined in claim 1 wherein in components (a) (i) and (a) (iii), said poly(1,4-butylene terephthalate) resin is linear or branched.
Claim 10
Dependent Claim
35 words
A composition as defined in claim 8 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 11
Dependent Claim
29 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 12
Dependent Claim
16 words
A composition as defined in claim 10 wherein said block copolymer has a ABA linear structure.
Claim 13
Dependent Claim
33 words
A composition as defined in claim 11 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 14
Dependent Claim
17 words
A composition as defined in claim 10 wherein said block copolymer has a radial ABA teleblock structure.
Claim 15
Dependent Claim
17 words
A composition as defined in claim 1 wherein said aromatic polycarbonate resin includes units derived from bisphenol-A.
Claim 16
Dependent Claim
19 words
A composition as defined in claim 1 which also includes (d) a flame-retardant amount of a flame retarding agent.
Claim 17
Dependent Claim
15 words
A composition as defined in claim 15 wherein component (d) comprises a brominated diphenyl ether.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |