US4337192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding composition having improved warp resistance and process for preparing the same
Assignee: General Electric Co
•
Filing: 1980-08-15
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Granted: 1982-06-29
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Expires: 2000-08-15
Abstract
Abstract Thermoplastic molding compositions are described, comprising a high molecular weight linear polyester or polyesters, optionally in admixture with block copolyesters, an impact modifier and a filler. These compositions are moldable into articles having improved properties.
Inventors
- 👤 Richard W. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:05
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C08K3/36; C08L; C08L67/00; C08L67/02; C08L83/00; C08L83/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
An improved thermoplastic molding composition comprising, in intimate admixture: (a) a poly(1,4-butylene terephthalate) resin; (b) a poly(ethylene terephthalate) resin; (c) an impact modifier of a segmented copolyester-ether; and (d) a filler material selected from the group consisting of finely divided surface treated clay and amorphous silica.
Claim 2
Dependent Claim
46 words
An improved thermoplastic molding composition comprising, in intimate admixture: (a) a poly(1,4-butylene terephthalate) resin; (b) a poly(ethylene terephthalate) resin; (c) an impact modifier of a segmented copolyester-ether; and (d) a filler material selected from the group consisting of finely divided surface treated clay and amorphous silica.
Claim 3
Dependent Claim
31 words
A composition as defined in claim 1, wherein the filler material is a finely divided surface treated clay which has a particle size of from about 1 to about 50 microns.
Claim 4
Dependent Claim
14 words
A composition as defined in claim 1 wherein the filler material is amorphous silica.
Claim 5
Dependent Claim
29 words
A composition as defined in claim 1, wherein the impact modifier is a segmented block copolyester-ether consisting of hard segments of polybutylene terephthalate and soft segments of polybutylene oxide.
Claim 6
Dependent Claim
14 words
A composition as defined in claim 1, which also contains a flame retardant additive.
Claim 7
Dependent Claim
53 words
A process for improving a thermoplastic composition comprising admixing: (a) a poly(1,4-butylene terephthalate) resin; (b) a poly(ethylene terephthalate) resin; (c) an impact modifier of a segmented copolyester-ether; and (d) a filler material selected from the group consisting of finely divided surface treated clay and amorphous silica, and forming a substantially homogenous, warp-free composition.
Claim 8
Dependent Claim
53 words
A process for improving a thermoplastic composition comprising admixing: (a) a poly(1,4-butylene terephthalate) resin; (b) a poly(ethylene terephthalate) resin; (c) an impact modifier of a segmented copolyester-ether; and (d) a filler material selected from the group consisting of finely divided surface treated clay and amorphous silica, and forming a substantially homogenous, warp-free composition.
Claim 9
Dependent Claim
30 words
A process as defined in claim 6, wherein the filler material is finely divided surface treated clay which has a particle size of from about 1 to about 50 microns.
Claim 10
Dependent Claim
14 words
A process as defined in claim 6, wherein the filler material is amorphous silica.
Claim 11
Dependent Claim
29 words
A process as defined in claim 6, wherein the impact modifier is a segmented block copolyester-ether consisting of hard segments of polybutylene terephthalate and soft segments of polybutylene oxide.
Claim 12
Dependent Claim
15 words
A process as defined in claim 6, wherein a flame retardant composition is also added.
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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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |