US5081184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent-resistant, compatible blends of polyphenylene ethers and linear polyesters
Assignee: General Electric Co
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Filing: 1989-05-22
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Granted: 1992-01-14
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Expires: 2009-05-22
Abstract
Abstract Impact- and solvent-resistant resin blends are prepared from a polyphenylene ether or blend thereof with a polystyrene, a linear polyester such as a poly(alkylene dicarboxylate), at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatibilizing agent, and, preferably, at least one elastomeric polyphenylene ether-compatible impact modifier. There may also be present a minor amount of at least one epoxide and/or masked isocyanate such as triglycidyl isocyanurate or a glycidyl methacrylate polymer. The polyphenylene ether preferably has a low proportion of unneutralized amino nitrogen, if any.
Inventors
- 👤 Sterling B. Brown
- 👤 Dennis J. McFay
- 👤 John B. Yates, III
- 👤 Gim F. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:12
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08L69/00; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08L63/00; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
179 words
A resinous composition comprising: (A) about 15-50% of at least one polyphenylene ether, or a blend thereof with at least one polystyrene, said polyphenylene ether comprising structural units having the formula ##STR9## wherein in each of said units independently, each Q 1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms, and each Q 2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined or grafted or coupled derivatives thereof; (B) about 20-80% of at least one poly(alkylene dicarboxylate), the weight ratio of component A to component B being at most 1.2:1; and (C) from 3% to about 50% of at least one polymer containing a substantial proportion of aromatic polycarbonate units and having a weight average molecular weight of at least about 40,000 as determined by gel permeation chromatography relative to polystyrene, or a blend thereof with a styrene homopolymer; all percentages being by weight and based on total components A, B and C.
Claim 2
Dependent Claim
179 words
A resinous composition comprising: (A) about 15-50% of at least one polyphenylene ether, or a blend thereof with at least one polystyrene, said polyphenylene ether comprising structural units having the formula ##STR9## wherein in each of said units independently, each Q 1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms, and each Q 2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined or grafted or coupled derivatives thereof; (B) about 20-80% of at least one poly(alkylene dicarboxylate), the weight ratio of component A to component B being at most 1.2:1; and (C) from 3% to about 50% of at least one polymer containing a substantial proportion of aromatic polycarbonate units and having a weight average molecular weight of at least about 40,000 as determined by gel permeation chromatography relative to polystyrene, or a blend thereof with a styrene homopolymer; all percentages being by weight and based on total components A, B and C.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 wherein component A is a blend of a poly(2,6-dimethyl-1,4-phenylene ether) with said polystyrene.
Claim 4
Dependent Claim
15 words
A composition according to claim 2 wherein the polystyrene in component A is a homopolymer.
Claim 5
Dependent Claim
16 words
A composition according to claim 2 wherein the polystyrene in component A is a rubber-modified polystyrene.
Claim 6
Dependent Claim
13 words
A composition according to claim 1 wherein component A is a poly(2,6-dimethyl-1,4-phenylene ether).
Claim 7
Dependent Claim
29 words
A composition according to claim 5 wherein component B is a poly(ethylene terephthalate) or a poly(butylene terephthalate) and the polycarbonate units in component C are bisphenol A polycarbonate units.
Claim 8
Dependent Claim
25 words
A composition according to claim 6 wherein component B is a poly(butylene terephthalate) having a number average molecular weight in the range of about 20,000-70,000.
Claim 9
Dependent Claim
24 words
A composition according to claim 7 wherein component C is a polycarbonate homopolymer having a weight average molecular weight inthe range of about 40,000-80,000.
Claim 10
Dependent Claim
37 words
A composition according to claim 6 wherein the polyphenylene ether contains no more than 800 ppm. of unneutralized amino nitrogen and has an intrinsic viscosity of at least 0.25 dl/g/ as measured in chloroform at 25° C.
Claim 11
Dependent Claim
42 words
A composition according to claim 9 wherein the polyphenylene ether has been prepared by oxidative coupling of at least one monohydroxyaromatic compound in the presence of a catalyst comprising a combination of cuprous or cupric ions, halide and at least one amine.
Claim 12
Dependent Claim
25 words
A composition according to claim 9 wherein component C is a polycarbonate homopolymer having a weight average molecular weight in the range of about 71,000-200,000.
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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) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |