Vulcanizable polyblend
AssigneeToray Industries, Inc.
InventorsChiaki Tanaka, Masanobu Morikawa, Yoshio Kohno
Life of this patent
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Abstract
An intimate polyblend of about 5-90% by weight of a thermoplastic copolyester or block copolyester elastomer and about 95-10% by weight of a vulcanizable synthetic or natural rubber. The preferred copolyester is a copolyester of polybutylene terephthalate and the prefered block copolyetherester is polybutylene terophthalate-poly (tetramethylene oxide) glycol block copolyester. These polyblends can be vulcanized to elastomeric molded articles which exhibit an excellent oil and oxygen/ozone resistance even at elevated temperatures, a high impact strength, an increased scuff resistance and an improved flexibility at low and high temperatures. The vulcanized molded articles also have an improved adhesive property with polyester fibers or fabrics.
Claims13
A vulcanizable polyblend which comprises an intimate mixture of about 5 to 90% by weight of a thermoplastic polyester which is a condensation polymer prepared from a dicarboxylic acid and a glycol component comprising at least 50 mol percent of 1,4-butanediol, the remainder of said glycol component being selected from the group consisting of ethylene glycol, propanediols, 1,6-hexanediol, xylylene glycol, cyclohexane dimethanol and 1,4-cyclohexanediol;
- said polyblend also comprising 95 to 10% by weight of a vulcanizable rubber.
Dependencies are inferred from the claim text.