Patent EP0237948A1 successfully refreshed from Google Patents.
EP0237948A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Methods for preparation of polyphenylene ether-polyamide compositions
Assignee: General Electric Co
•
Filing: 1987-03-11
•
Granted: —
•
Expires: 2007-03-11
Abstract
Abstract Polyphenylene ether-polyamide compositions compatibilized with polyfunctional compounds such as aliphatic polycarboxylic acids can achieve improved impact strength and ductility by producing an intermediate polyphenylene ether-polyamide product containing at least some nylon 6,6 and thereafter further compounding the intermediate product with a second polyamide component containing at least some of a polyamide different from nylon 6,6.
Inventors
- 👤 Gregory Robert Chambers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L77/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
A method for producing a compatibilized polyphenylene ether-polyamide composition having improved impact strength and ductility comprising the steps of: (a) compounding in a first step (i) a polyphenylene ether resin, (ii) a first polyamide component comprised of 20 to 100 weight percent nylon 6,6 resin and 0 to 80 weight percent of another polyamide resin; and (iii) a compatibilizing amount of a polyfunctional compatibilizer compound; thereby providing an intermediate polyphenylene ether-polyamide composition; and (b) compounding in a second step, into said intermediate polyphenylene ether-polyamide composition, a second polyamide component containing at least one polyamide resin selected from the group consisting of nylon 6; nylon 6,9; nylon 10; nylon 11; nylon 12; nylon 4,6 and amorphous nylon; or a blend of said second polyamide with nylon 6,6, thereby providing compatibilized polyphenylene ether-polyamide product comprised of a plurality of polyamide resins.
Claim 2
Independent Claim
139 words
A method for producing a compatibilized polyphenylene ether-polyamide composition having improved impact strength and ductility comprising the steps of: (a) compounding in a first step (i) a polyphenylene ether resin, (ii) a first polyamide component comprised of 20 to 100 weight percent nylon 6,6 resin and 0 to 80 weight percent of another polyamide resin; and (iii) a compatibilizing amount of a polyfunctional compatibilizer compound; thereby providing an intermediate polyphenylene ether-polyamide composition; and (b) compounding in a second step, into said intermediate polyphenylene ether-polyamide composition, a second polyamide component containing at least one polyamide resin selected from the group consisting of nylon 6; nylon 6,9; nylon 10; nylon 11; nylon 12; nylon 4,6 and amorphous nylon; or a blend of said second polyamide with nylon 6,6, thereby providing compatibilized polyphenylene ether-polyamide product comprised of a plurality of polyamide resins.
Claim 3
Dependent Claim
45 words
A method as in Claim 1 wherein said polyphenylene ether resin is comprised primarily of units selected from the group consisting of 2,6-dimethyl phenol and 2,3,6-trimethyl phenol units, and has an intrinsic viscosity of, approximately 0.1 to 0.6 dl/g as measured in chloroform at 25°C.
Claim 4
Dependent Claim
14 words
A method as in Claim 2 wherein said polyphenylene ether is poly (2,6-dimethyl-1,4-phenylene ether).
Claim 5
Dependent Claim
71 words
A method as in Claim 1 wherein said polyfunctional compatibilizer is a compound having both (a) a group represented by the formula (OR) wherein R is hydrogen or an alkyl, aryl, acyl or carbonyl dioxy group and (b) at least two groups which may be independently selected from the group consisting of carboxylic acid, acid halide, acid anhydride, anhydride, acid halide anhydride, acid ester, acid amide, imido, amino and salts thereof.
Claim 6
Dependent Claim
14 words
A method as in Claim 4 wherein said polyfunctional compatibilizing compound is citric acid.
Claim 7
Dependent Claim
27 words
A method as in Claim 5 wherein said compatibilizing agent is 0.2 to 2.0 parts citric acid based on the weight of the compatibilized polyphenylene ether-polyamide product.
Claim 8
Dependent Claim
40 words
A method as in Claim 1 wherein said polyphenylene ether-polyamide resin is further comprised of up to, approximately 25 parts by weight of a rubbery impact modifier, based upon the weight of the polyphenylene ether and polyamide components taken together.
Claim 9
Dependent Claim
41 words
A method as in Claim 7 wherein said rubbery impact modifier is selected from the group consisting of styrene-butadiene-styrene triblock copolymer, styrene-ethylene-butylene-styrene triblock copolymer, styrene-ethylene propylene diblock copolymer, and a core/shell modifier having a crosslinked butylacrylate core and crosslinked styrenic shell.
Claim 10
Dependent Claim
50 words
A method as in Claim 1 wherein said first and second polyamide components, taken together, comprise at least 35 percent by weight of the compatibilized polyphenylene ether-polyamide product based upon the total weight of the polyphenylene ether resin, the first and second polyamide components and any optional rubbery impact modifier.
Claim 11
Dependent Claim
22 words
A method as in Claim 1 wherein said first step compounding is accomplished at the feed throat and of a thermoplastic extruder.
Claim 12
Dependent Claim
30 words
A method as in Claim 1 wherein said second compounding step is accomplished by feeding said second polyamide component to said extruder at an addition port downstream from said feedthroat.
Claim 13
Dependent Claim
21 words
A method as in Claim 1 comprising the further steps of drying and pelletizing the thermoplastic extrudate of the foregoing steps.
Claim 14
Dependent Claim
5 words
The product of Claim 1.
References Cited (Backward Citations)
EP0164767A2
Cited
WO1985005372A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.