Polymer blends with improved dielectric strength
AssigneeHooker Chemicals & Plastics Corporation
InventorGideon Salee
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Abstract
This invention relates to polymer blends having improved hydrolytic stability, moldability, fire retardancy and dielectric strength which comprise, in admixture, (1) a linear aromatic polyester prepared from an aromatic dicarboxylic acid and bisphenol, and (2) polyphenylene sulfide. Such blends have a weight proportion of the polyphenylene sulfide in the range of above about 5 weight percent to less than about 60 weight percent, based on the admixture of the sulfide polymer and the polyester.
Claims23
A thermoplastic polymeric composition comprising, in admixture, (a) a linear aromatic polyester of components comprising a bisphenol and a dicarboxylic acid, (b) polyphenylene sulfide present in a proportion of more than about 5 weight percent to less than about 60 weight percent, and (c) 0 to about 70 weight percent of particulate glass filler, said proportions being based on the combined weight of the polyphenylene sulfide and the polyester with the proviso that when particulate glass is present in the composition, the weight ratio of the polyphenylene sulfide to the glass is at least about 1.5:1.
Dependencies are inferred from the claim text.