US4564658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester-linear low density polyethylene molding compositions
Assignee: General Electric Co
•
Filing: 1982-11-24
•
Granted: 1986-01-14
•
Expires: 2002-11-24
Abstract
Abstract A modified thermoplastic molding composition having improved compatibility and mold releasability the composition comprising a thermoplastic polyester resin selected from the group consisting of polyethylene terephthalate, poly(1,4-butylene terephthalate), a co-polyester or any combination thereof and from about 0.1 to about 20% by weight based on the total composition of linear low density polyethylene. Optionally, the composition may have added thereto an effective amount of an aromatic polycarbonate for impact strength. The compositions may also contain an effective amount of at least one additive selected from the group consisting of fillers, reinforcing agents, nucleating agents, flow promoters, coloring agents, flame retardants, coupling agents and stabilizers.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A thermoplastic molding composition comprising (a) poly(1,4-butylene terephthalate) and (b) from 0.1 to about 20 percent by weight based on (a) & (b) of a linear low density polyethylene, which is a copolymer of ethylene and butene-1, having a density of from about 0.89 to about 0.96 grams/cc and a melt index of at least about 5 gm/10 min.
Claim 2
Dependent Claim
59 words
A thermoplastic molding composition comprising (a) poly(1,4-butylene terephthalate) and (b) from 0.1 to about 20 percent by weight based on (a) & (b) of a linear low density polyethylene, which is a copolymer of ethylene and butene-1, having a density of from about 0.89 to about 0.96 grams/cc and a melt index of at least about 5 gm/10 min.
Claim 3
Dependent Claim
23 words
The composition as defined in claim 1 wherein the linear low density polyethylene has a density of from about 0.915 to 0.945 grams/cc.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein the linear low density polyethylene comprises about 0.5 to 14% by weight of the resinous components.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein the linear low density polyethylene comprises about 1 to about 5% by weight of the resinous components.
Claim 6
Dependent Claim
15 words
The composition of claim 1 which further comprises a reinforcing amount of a reinforcing agent.
Claim 7
Dependent Claim
42 words
The compositions as defined in claim 1 which further contains an effective amount at least one additive selected from the group consisting of flow promoters, flame retardants, fillers, reinforcing agents, coloring agents, drip retardants, nucleating agents, impact modifiers, coupling agents, and stabilizers.
Claim 8
Dependent Claim
41 words
The composition as defined in claim 1 which further contains in effective amount at one additive selected from the group consisting of flow promoters, flame retardants, fillers, reinforcing agents, coloring agents, drip retardants, nucleating agents, impact modifiers, coupling agents, and stabilizers.
References Cited (Backward Citations)
US4076698A
Cited
US4076698B1
Cited
US3937757A
Cited
US3405198A
Cited
US4097446A
Cited
US3953394B1
Cited
US3953394A
Cited
US3900549A
Cited
US3769260A
Cited
US4046837A
Cited
US3944699A
Cited
US4128607A
Cited
US4081424A
Cited
US4122061A
Cited
US4217426A
Cited
US4185047A
Cited
US4290937A
Cited
EP0004645A2
Cited
US4288573A
Cited
US4327198A
Cited
US4461871A
Cited
US4354009A
Cited
US4401785A
Cited
US4463121A
Cited
US4448913A
Cited
US4476274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |