Polyurethane polymerization processes and products

Details Polyurethane polymerization processes and products Polyurethane polymerization processes and products

B - Operations, Transporting

29

D

117/126, 18/647

B29D 27/00 (1980.01)

Patent

CA 1155623

ABSTRACT OF THE DISCLOSURE A method of bringing about a heat-controlled polyurethane polymerization reaction between polyols and polyisocyanates which comprises, forming a foamable or non-foamable plastisol layer comprising a synthetic resin and a plasticizer therefor, firming the surface of the foamable or non-foamable plastisol layer, forming on the surface of the foamable or non-foamable plastisol layer a non-foamable plastisol wear layer comprising a synthetic resin, a plasticizer for the synthetic resin, and a polyurethane polymerization catalyst not having any polymeriz- ing effect on the synthetic resin but capable of bringing about a polyurethane polymerization reaction between polyols and polyisocyanates; firming the surface of the non-foamable plast- isol wear layer; forming on the surface of the non-foamable plastisol wear layer a top coating layer comprising unreacted polyols and unreacted polyisocyanates but essentially no poly- urethane polymerization catalyst, nor any reacted polyols nor any reacted polyisocyanates nor any polyurethane polymers or prepolymers; and heating the non-foamable plastisol wear layer and the top coating layer whereby the polyurethane polymeriza- tion catalyst in the non-foamable plastisol wear layer is be- lieved to migrate therefrom to enter the top coating layer com- prising the polyols and polyisocyanates to bring about a poly- urethane polymerizarion reaction therein. The products which exist during and subsequent to such polyurethane polymerization reaction are also included within the scope and the spirit of the present inventive concept.

334207

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