US4476274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear low density polyethylene impact modifier for thermoplastic polyesters
Assignee: General Electric Co
•
Filing: 1983-01-03
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Granted: 1984-10-09
•
Expires: 2003-01-03
Abstract
Abstract High molecular weight thermoplastic polyesters and polyester blends having unexpected improved impact strength by incorporating therein linear low density polyethylene and glass fibers.
Inventors
- 👤 Nan-I Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:31
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
110 words
A thermoplastic molding composition having improved impact strength comprising (a) from about 5 to about 92% by weight of at least one high molecular weight polymer selected from the groups consisting essentially of (a) poly(ethylene terephthalate), (b) poly(1,4-butylene terephthalate), (c) a copolyester of (a) or (b), and (d) a blend of (a), (b), or (c) with an aromatic polycarbonate resin or any combination thereof, wherein any one polymer comprises 0-100% of the polymer component; (b) from about 3 to about 20% by weight of a linear low density polyethylene having a density of from about 0.89 to 0.96 grams/cc, and (c) from about 5 to 50% by weight glass fibers.
Claim 2
Dependent Claim
110 words
A thermoplastic molding composition having improved impact strength comprising (a) from about 5 to about 92% by weight of at least one high molecular weight polymer selected from the groups consisting essentially of (a) poly(ethylene terephthalate), (b) poly(1,4-butylene terephthalate), (c) a copolyester of (a) or (b), and (d) a blend of (a), (b), or (c) with an aromatic polycarbonate resin or any combination thereof, wherein any one polymer comprises 0-100% of the polymer component; (b) from about 3 to about 20% by weight of a linear low density polyethylene having a density of from about 0.89 to 0.96 grams/cc, and (c) from about 5 to 50% by weight glass fibers.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the polymer is poly(ethylene terephthalate).
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the polymer is poly(1,4-butylene terephthalate).
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein the polymer is a copolyester derived from one or more aliphatic and/or aromatic dicarboxylic acids and one or more aliphatic or cycloaliphatic glycols.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein the copolyester is a random copolyester.
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein the copolyester is a block copolyester.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the polymer is an aromatic polycarbonate resin.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein the polycarbonate is derived from 2,2-Bis(4-hydroxyphenyl)propane.
Claim 10
Dependent Claim
17 words
The composition of claim 1 wherein the polymer is a blend of poly(ethylene terephthalate) and poly(1,4-butylene terephthalate).
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein the polymer is a blend of poly(1,4-butylene terephthalate) and aromatic polycarbonate.
Claim 12
Dependent Claim
19 words
The composition of claim 1 wherein the polymer is a blend of poly(ethylene terephthalate), poly(1,4-butylene terephthalate) and aromatic polycarbonate.
Claim 13
Dependent Claim
22 words
The composition of claim 1 wherein the linear low density polyethylene has a density of from about 0.915 to about 0.945 grams/cc.
Claim 14
Dependent Claim
30 words
The composition of claim 1 wherein the linear low desnity polyethylene is a copolymer derived from ethylene and a minor amount of an alpha-olefin having 3 to 10 carbon atoms.
Claim 15
Dependent Claim
30 words
The composition of claim 1 wherein the linear low density polyethylene is a copolymer derived from ethylene and a minor amount of an alpha-olefin having 4 to 8 carbon atoms.
Claim 16
Dependent Claim
18 words
The composition of claim 14 wherein the linear low density polyethylene copolymer is derived from ethylene and butene-1.
Claim 17
Dependent Claim
18 words
The composition of claim 14 wherein the linear low density polyethylene copolymer is derived from ethylene and octene-1.
Claim 18
Dependent Claim
25 words
The composition as defined in claim 1 wherein the linear low density polyethylene comprises from about 5 to about 15% by weight of the composition.
Claim 19
Dependent Claim
33 words
The composition of claim 1 further comprising from about 5 to about 25% by weight of an impact modifier selected from the group consisting of core-shell acrylic elastomers, acrylic copolymers, and vinylic copolymers.
Claim 20
Dependent Claim
14 words
The composition of claim 18 wherein the impact modifier is a core-shell acrylic elastomer.
Claim 21
Dependent Claim
24 words
The composition of claim 19 wherein the impact modifier has a butadiene based rubbery core and a second stage polymerized from styrene and methylmethacrylate.
Claim 22
Dependent Claim
24 words
The composition of claim 19 wherein the impact modifier has a poly styrene-butadiene rubbery core and a second stage polymerized from styrene and methylmethacrylate.
Claim 23
Dependent Claim
28 words
The composition of claim 19 wherein the impact modifier has a crosslinked acrylic first stage also containing graft linking monomer and a second stage polymerized from methyl methacrylate.
Claim 24
Dependent Claim
32 words
The composition of claim 19 wherein the impact modifier is an ABS graft copolymer having a relatively high content of a cross-linked butadiene polymer graft base with acrylonitrile and styrene grafted thereon.
Claim 25
Dependent Claim
15 words
The composition as defined in claim 18 wherein the impact modifier is an acrylic copolymer.
Claim 26
Dependent Claim
14 words
The composition as defined in claim 24 wherein the acrylic copolymer is ethylene ethylacrylate.
Claim 27
Dependent Claim
13 words
The composition as defined in claim 24 wherein the acrylic copolymer is methacrylate-butadienestyrene.
Claim 28
Dependent Claim
13 words
The composition of claim 18 wherein the impact modifier is a vinylic copolymer.
Claim 29
Dependent Claim
13 words
The composition of claim 27 wherein the vinylic copolymer is ethylene vinyl acetate.
Claim 30
Dependent Claim
11 words
The composition of claim 27 wherein the vinylic copolymer is styrene-butadiene-styrene.
Claim 31
Dependent Claim
17 words
The composition of claim 1 further comprising an effective amount of mica or clay to reduce warpage.
Claim 32
Dependent Claim
19 words
The composition of claim 30 wherein the mica or clay comprises up to 40% by weight of the composition.
Claim 33
Dependent Claim
17 words
The composition of claim 18 further comprising an effective amount of mica or clay to reduce warpage.
Claim 34
Dependent Claim
16 words
The composition of claim 1 further comprising a flame retardant amount of a flame retarding agent.
Claim 35
Dependent Claim
22 words
The composition of claim 33 wherein the flame retarding agent comprises a flame retardant compound in combination with a flame retardant synergist.
Claim 36
Dependent Claim
16 words
The composition of claim 30 further comprising a flame retardant amount of a flame retarding agent.
Claim 37
Dependent Claim
16 words
The composition of claim 1 further comprising an effective amount of talc to enhance electrical properties.
Claim 38
Dependent Claim
17 words
The composition of claim 36 wherein the talc comprises up to 40% by weight of the composition.
Claim 39
Dependent Claim
16 words
The composition of claim 30 further comprising an effective amount of talc to enhance electrical properties.
Claim 40
Dependent Claim
37 words
The composition of claim 1 further comprising at least one additive selected from the group consisting of flow promoters, other fillers and reinforcing fillers, coloring agents, drip retardants, nucleating agents, coupling agents and stabilizers, in effective amounts.
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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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |