Polyesters of trans-4,4'-stilbenedicarboxylic acid, ethylene glycol, and 1,4-butanediol
AssigneeEastman Kodak Company
InventorsJohn C. Morris, Winston J. Jackson, Jr.
Life of this patent
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Abstract
The polyesters of trans-4,4'-stilbenedicarboxylic acid, 95 to 60 mol % 1,4-butanediol, and 5 to 40 mol % ethylene glycol can be injection-molded to give shaped objects having exceptionally high heat resistance. Many of the polyesters also have excellent hydrolytic stability and chemical resistance. The polyesters of this invention can be molded, extruded into film, or spun into fibers having these properties.
Claims7
A copolyester comprising repeating units from at least 80 mol % trans-4,4'-stilbenedicarboxylic acid, repeating units from about 95-60 mol % 1,4-butanediol and repeating units from about 5-40 mol % ethylene glycol, the total mol % of acid components and glycol components each being 100 mol %, and said polyester having an inherent viscosity of 0.3 or more determined at 25.degree. C. in 25/35/40 (wt/wt/wt) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 mL.
Dependencies are inferred from the claim text.