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Patent US4431779A successfully refreshed from Google Patents.
US4431779A
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Polyetherimide-polyphenylene ether blends
Assignee: General Electric Co
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Filing: 1982-04-02
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Granted: 1984-02-14
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Expires: 2002-04-02
Abstract
Abstract Disclosed are blends of (a) a polyetherimide and (b) a polyphenylene ether. The components of the blend are generally compatible and the blends exhibit good impact strength as well as good mechanical properties. The blends are suitable for forming insulative films on substrates and for the manufacture of filaments, fibers, coatings, molded articles and the like.
Inventors
- 👤 Dwain M. White
- 👤 Robert O. Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:54
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L79/00; C08L79/04; C08L79/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
A composition comprising a blend of (a) a polyphenylene ether and (b) polyetherimide wherein the polyphenylene ether consists essentially of the structural formula: ##STR14## wherein the oxygen ether atom of one structural unit is connected to the benzene nucleus of the next adjoining unit, b is a positive integer and is at least 50 and Y 1 , Y 2Y , Y 3 and Y 4 , which may be the same or different, are nonovalent substituents selected from the group consisting of hydrogen, halogen, hydrocarbon radicals, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the benzene nucleus, hydrocarboxy radicals and halohydrocarboxy radicals having at least two carbon atoms between the halogen atom and the benzene nucleus.
Claim 2
Dependent Claim
122 words
A composition comprising a blend of (a) a polyphenylene ether and (b) polyetherimide wherein the polyphenylene ether consists essentially of the structural formula: ##STR14## wherein the oxygen ether atom of one structural unit is connected to the benzene nucleus of the next adjoining unit, b is a positive integer and is at least 50 and Y 1 , Y 2Y , Y 3 and Y 4 , which may be the same or different, are nonovalent substituents selected from the group consisting of hydrogen, halogen, hydrocarbon radicals, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the benzene nucleus, hydrocarboxy radicals and halohydrocarboxy radicals having at least two carbon atoms between the halogen atom and the benzene nucleus.
Claim 3
Dependent Claim
24 words
A composition in accordance with claim 1 wherein Y 1 is methyl, Y 2 is phenyl and Y 3 and Y 4 are hydrogen.
Claim 4
Dependent Claim
23 words
A composition in accordance with claim 1 wherein Y 1 and Y 2 are methyl and Y 3 and Y 4 are hydrogen.
Claim 5
Dependent Claim
23 words
A composition in accordance with claim 1 wherein Y 1 and Y 2 are phenyl and Y 3 and Y 4 are hydrogen.
Claim 6
Dependent Claim
169 words
A composition in accordance with claim 1, 2, 3 or 4 wherein the polyetherimide has the formula; ##STR15## where a represents a whole number in excess of 1, the group --O--A< is selected from: ##STR16## R' being hydrogen, lower alkyl or lower alkoxy, Z is a member of the class consisting of (1) ##STR17## and (2) divalent organic radicals of the general formula: ##STR18## where X is a member selected from the class consisting of divalent radicals of the formulas, ##STR19## where q is 0 or 1, y is a whole number from 1 to 5, and R is a divalent organic radical selected from the class consisting of (1) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (2) alkylene radicals and cycloalkylene radicals having from 2-20 carbon atoms, C.sub.(2-8) alkylene terminated polydiorganosiloxane, and (3) divalent radicals included by the formula ##STR20## where Q is a member selected from the class consisting of ##STR21## where x is a whole number from 1 to 5 inclusive.
Claim 7
Dependent Claim
32 words
A composition in accordance with claim 5 wherein the polyetherimide is of the formula; ##STR22## and the divalent bonds of O--Z--O radical are in the 3,3'; 3,4'; 4,3' or the 4,4' position.
Claim 8
Dependent Claim
17 words
A composition in accordance with claim 6 wherein Z is; ##STR23## and R is selected from; ##STR24##
Claim 9
Dependent Claim
15 words
A composition in accordance with claim 7 wherein the polyetherimide is of the formula: ##STR25##
References Cited (Backward Citations)
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |