Three-dimensional copolymers of polyphenylene ether resinsand sytrenic resins
AssigneeGeneral Electric Company
InventorsHua Guo, Manuel Cavazos, John B. Yates, III
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Abstract
A three dimensional copolymer network of polyphenylene ether segments and styrenic resins such as styrene/acrylonitrile copolymers provide articles of high heat reesistance and dielectric properties suitable for use in electronic components. Methods for preparing the copolymers employ polyphenylene ether polymers with end caps having at least one pair of unsaturated aliphatic carbon atoms, i.e. carbon-carbon double bond, and polymerize styrene monomers and acrylonitrile monomers or styrene/acrylonitrile copolymers or both in the presence of these polyphenylene ether polymers.
Claims22
A composition comprising:
- a cross-linked copolymer having polyphenylene ether segments, and segments of one or more styrene units, acrylonitrile units and combinations of styrene and acrylonitrile units,
- wherein the polyphenylene ether segments are derived from a polyphenylene ether resin having an intrinsic viscosity of 0.20 dl/g or less as measured in chloroform at 25° C.
- and wherein the polyphenylene ether resin comprises polyphenylene ether polymer chains having at least one end cap, said end cap having at least one pair of unsaturated aliphatic carbon atoms.
A method for making cross-linked a copolymer composition comprising a) introducing a polyphenylene ether resin into a reaction medium comprising styrenic monomers and acrylonitrile monomers,
- wherein the amount of polyphenylene ether resin is 20 wt % or more of the total combined weight of polyphenylene ether resin, styrenic monomers, and acrylonitrile monomers,
- and wherein the polyphenylene ether resin has an intrinsic viscosity of 0.20 dl/g or less as measured in chloroform at 25° C. and comprising at least one polyphenylene ether polymer chain having at least one end cap comprising a pair of unsaturated aliphatic carbon atoms, and
- b) polymerizing the polyphenylene ether resin, styrenic monomers and acrylonitrile monomers.
Dependencies are inferred from the claim text.