EP0440939A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polyphenylene ether-polyamide compositions from dicarboxylate-capped polyphenylene ethers
Assignee: General Electric Co
•
Filing: 1990-12-15
•
Granted: —
•
Expires: 2010-12-15
Abstract
Abstract Polyphenylene ethers are capped by reaction in the melt, with application of vacuum, with at least one trimellitic anhydride salicylate ester, preferably the 4-(phenyl salicylate) ester. The preferred melt processing method is extrusion with vacuum venting. By this method, the polyphenylene ether is capped with reactive dicarboxylate groups and also with salicylate groups, improving its thermal stability. The capped polyphenylene ether is capable of forming copolymers with polyamides, and said copolymers are useful as compatibilizers for polyphenylene ether-polyamide blends.
Inventors
- 👤 Timothy Mark Sivavec
- 👤 Sharon Joy Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:15
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08G81/00; C08G81/02; C08G81/024; C08G81/025; C08L77/00; C08L67/00; C08L75/00; C08L81/00; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A composition comprising at least one polyamide and a dicarboxylate-capped polyphenylene ether composition prepared by melt blending, with application of vacuum, at least one polyphenylene ether with at least one trimellitic anhydride salicylate ester of the formula wherein R¹ is C₁₋₆ alkyl or a C₆₋₁₀ aromatic hydrocarbon radical.
Claim 2
Dependent Claim
69 words
A composition according to claim 1 wherein the polyphenylene ether comprises a plurality of structural units having the formula wherein each Q¹ 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 Q² is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q¹.
Claim 3
Dependent Claim
14 words
A composition according to claim 2 wherein the polyphenylene ether is a poly(2,6-dimethyl-1,4-phenylene ether).
Claim 4
Dependent Claim
15 words
A composition according to claim 3 wherein the polyamide is a polyamide-6 or a polyamide-66.
Claim 5
Dependent Claim
18 words
A composition according to claim 4 which comprises about 5-75% by weight polyphenylene ether and about 25-95% polyamide.
Claim 6
Dependent Claim
25 words
A composition according to claim 5 which also contains uncapped polyphenylene ether in an amount up to about 50% by weight of total polyphenylene ether.
Claim 7
Dependent Claim
10 words
A composition according to claim 5 wherein R¹ is phenyl.
Claim 8
Dependent Claim
13 words
A composition according to claim 5 which also comprises an elastomeric impact modifier.
Claim 9
Dependent Claim
35 words
A composition according to claim 8 wherein the impact modifier is a triblock copolymer wherein the end blocks are derived from styrene and the midblock is derived from at least one of isoprene and butadiene.
Claim 10
Dependent Claim
12 words
A method according to claim 9 wherein the midblock has been hydrogenated.
Claim 11
Dependent Claim
10 words
A composition according to claim 10 wherein R¹ is phenyl.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.