Patent ID: 6352654
Filing Date: 2002-03-05
Classification: C08L,H01B,Y10S

Abstract:
A conductive polyphenylene ether-polyamide composition prepared by a method which comprises:I. melt blending, to form a first resin blend: (A) a polyphenylene ether resin; (B) at least one impact modifying polymer comprising at least 40% by weight of ethylenically unsaturated structural units; and (C) an effective proportion of a non-polymeric functionalizing compound capable of reacting in the melt with polyphenylene ethers and polyamides; and II. melt blending said first resin blend with (D) a polyamide composition comprising (i) at least 20% by weight of at least one polyamide consisting essentially of structural units of the formula â€”NHâ€”R1â€”COâ€”â€ƒâ€ƒ(I) with any balance being (ii) at least one polyamide consisting essentially of structural units of the formulaâ€”NHâ€”R2â€”NHâ€”COâ€”R3â€”COâ€”,â€ƒâ€ƒ(II) wherein each of R1-3 is an alkylene radical, said polyamide introduced in this step being in powder form; and(E) an effective proportion of conductive carbon fibrils; to form a final resin blend comprising polyamide as a continuous phase and polyphenylene ether, impact modifying polymer and carbon fibrils as one or more dispersed phases, said final resin blend having an Izod notched impact strength of at least 214 Joules/meter, and, in the falling dart impact test, a total energy at 23Â° C. of at least 48 joules and a failure mode other than fully brittle; the weight ratio of reagent D to the combination of reagents A, B and C in said final resin blend being at least about 0.75.