Improvements in Urethane Sponge for Canvas Shoe Soles

Abstract

As an application of urethane sponge for articles of daily use, studies have been made to manufacture canvas shoe soles by the in-situ molding of carbon dioxide blown liquid urethane elastomers obtained from tolylene diisocyanate and ethylene oxide capped polypropylene ether glycol. As for the catalyst system, bis-(N,N- dimethylaminoethyl) ether in combination with triethylene diamine gave good results in this case. Canvas shoe soles have been suc cessfully made by machine. The results on the put-on test of these canvas shoes are quite satisfactory.