US4369280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybutylene terephthalate molding compositions and articles molded therefrom
Assignee: General Electric Co
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Filing: 1981-08-04
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Granted: 1983-01-18
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Expires: 2001-08-04
Abstract
Abstract Polybutylene terephthalate molding compositions which contain a small amount of ethylene-ethyl acrylate copolymer, or an ethylene-vinyl acetate copolymer, or a mixture of these copolymers, and optionally polyethylene, provide moldings which in preferred embodiments possess improved impact resistance and lower specific gravity, without more than negligible loss of other properties. Other conventional modifiers can be present.
Inventors
- 👤 Ronald L. Dieck
- 👤 Frank N. Liberti
- 👤 Allen D. Wambach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:23
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
82 words
A polybutylene terephthalate molding composition which provides moldings of improved impact resistance, containing a component selected from the group consisting of ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers, and mixtures of said copolymers; the weight of said component being between 0.1% and 4.5% of the weight of said composition, the molar ratio of said ethylene to each of said ethyl acetate and to said vinyl acetate being between 1:10 and 10:1, and the molecular weight of said copolymers being between 100,000 and 1,000,000.
Claim 2
Dependent Claim
82 words
A polybutylene terephthalate molding composition which provides moldings of improved impact resistance, containing a component selected from the group consisting of ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers, and mixtures of said copolymers; the weight of said component being between 0.1% and 4.5% of the weight of said composition, the molar ratio of said ethylene to each of said ethyl acetate and to said vinyl acetate being between 1:10 and 10:1, and the molecular weight of said copolymers being between 100,000 and 1,000,000.
Claim 3
Dependent Claim
14 words
A molding composition according to claim 1 wherein said poly(butylene terephthalate) is poly(1,4-butylene terephthalate).
Claim 4
Dependent Claim
15 words
A molding composition according to claim 1 wherein said component is an ethylene-ethylene acrylate copolymer.
Claim 5
Dependent Claim
15 words
A molding composition according to claim 1 wherein said component is an ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
29 words
A molding composition according to claim 1 wherein the molar ratio of said ethylene to each of said ethyl acrylate and said vinyl acetate is between 3:1 and 1:3.
Claim 7
Dependent Claim
24 words
A molding composition according to claim 1 wherein the weight of said component is between 1% and 4.5% of the weight of said composition.
Claim 8
Dependent Claim
16 words
A molding composition according to claim 1 containing between 0.1% and 4.5% by weight of polyethylene.
Claim 9
Dependent Claim
16 words
A molding composition according to claim 1 containing between 1% and 3% by weight of polyethylene.
Claim 10
Dependent Claim
17 words
A molding composition according to claim 1 containing between 1% and 50% by weight of poly(ethylene terephthalate).
Claim 11
Dependent Claim
26 words
A molding composition according to claim 1 which contains between 1% and 60%, based on the polymer content of said composition, of a fibrous reinforcing agent.
Claim 12
Dependent Claim
15 words
A molding composition according to claim 10 wherein the fibrous reinforcing agent is glass fibers.
Claim 13
Dependent Claim
23 words
A molding composition according to claim 1 containing 0.1% to 1.0% of an agent stabilizing the polymer content of said composition towards heat.
Claim 14
Dependent Claim
24 words
A molding composition according to claim 1 containing 1% to 20% by weight of a component or components decreasing the combustibility of said composition.
Claim 15
Dependent Claim
18 words
A molding composition according to claim 13 wherein said components are Sb 2 O 3 and decabromodiphenyl ether.
Claim 16
Dependent Claim
19 words
A molding composition according to claim 13 wherein said components are tetrabromobisphenol A/ bisphenol A copolycarbonate and antimony oxide.
Claim 17
Dependent Claim
21 words
A molding composition according to claim 13 wherein said components are tetrabromobisphenol A carbonate oligomer capped with tribromophenol and antimony oxide.
Claim 18
Dependent Claim
10 words
An article molded from a composition according to claim 1.
Claim 19
Dependent Claim
10 words
An article molded from a composition according to claim 7.
Claim 20
Dependent Claim
10 words
An article molded from a composition according to claim 9.
References Cited (Backward Citations)
US2465319A
Cited
US3937757A
Cited
US3751306A
Cited
US4013613A
Cited
US3833685A
Cited
US4035333A
Cited
US4044073A
Cited
US4034013A
Cited
US4096202A
Cited
US4096202B1
Cited
US4034016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |