Method for obtaining polyester resin products having desired strength, and mixture used in said method
AssigneeNisshinbo Industries, Inc.
InventorsYasuo Imashiro, Ikuo Takahashi, Naofumi Horie, Shigekazu Suzuki
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Abstract
A method for obtaining polyester resin products having a desired strength and a mixture used in a method for obtaining polyester resin products having a desired strength. In the method and mixture a carbodiimide compound is added to a polyester resin. According to the method and mixture, polyester resin pellets having a desired strength can be obtained by adding a carbodiimide compound to a recovered polyester resin such as a recovered PET resin. Strength of the polyester resin during processing of the polyester resin is maintained.
Claims8
A method for maintaining a strength of a recovered polyester resin during processing of said resin, which method comprises forming a mixture of (1) an aliphatic polycarbodiimide produced from a raw material diisocyanate selected from the group consisting of dicyclohexylmethane-4,4-diisocyanate and tetramethylxylylene-diisocyanate and (2) said recovered polyester resin and processing said mixture to form a shaped article.
A mixture used in a method for maintaining a strength of recovered polyester resin during processing of said polyester resin, which mixture comprises an aliphatic polycarbodiimide produced from a raw material diisocyanate selected from the group consisting of dicyclohexylmethane-4,4-diisocyanate and tetramethylxylylene-diisocyanate and said recovered polyester resin.
Dependencies are inferred from the claim text.