Process for preparing polyurethane molded part

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264 466, 264255, 264267, 2643286, 264DIG83, 4284233, 4284237, 4284242, 4284244, 4284246, B29D 2700, B32B 520, B32B 514

Patent

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042822858

ABSTRACT:
A reaction injection molding process for producing a coated polyurethane part in which a liquid mixture of polyurethane reactants is injected into a mold where it is reacted and molded into a shaped part at elevated temperatures. The surface of the mold is coated, prior to molding, with a coating composition containing a polyurethane catalyst. The catalyst acts to bond the coating composition to the molded part so that the shaped part upon removal from the mold contains a firmly adherent coating of the coating composition.

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