Patent ID: 6376606
Filing Date: 2002-04-23
Classification: C08L

Abstract:
A process for the manufacture of a thermoplastic composition, comprising:a polyphenylene ether resin powder wherein at least 80 weight percent of the polyphenylene ether resin powder will pass through a 3000 micron sieve, and a styrene-butadiene block copolymer, wherein the styrene content in the block copolymer is at least 50% by weight based on the weight of the copolymer, and wherein the butadiene block length and structure results in butadiene domains that are smaller than the wavelength of visible light, wherein the composition is substantially free of thermoplastic resins selected from the group consisting of polyamide resins, high impact polystyrene resins, polyester resins, polycarbonate resins, polysulfone resins, polyarylate resins, polyphenylene sulfide resins, and polyetherimide resins; and wherein said process comprises melt-mixing the polyphenylene ether resin powder with the styrene-butadiene block copolymer; and wherein the styrene-butadiene block copolymer is a linear di-block block copolymer, a linear tri-block block copolymer, or a mixture of linear di-block and linear tri-block block copolymers.