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Preparation of urethane elastomers from epoxy resin, polyols and polyisocyanates using a catalyst composition of an organometal salt with either nitrogen or phosphorus compounds
Preparation of urethane elastomers from epoxy resin, polyols and polyisocyanates using a catalyst composition of an organometal salt with either nitrogen or phosphorus compounds
Elastomers are prepared from a mixture comprising a 1600 equivalent weight polyether polyol such as a glycerine initiated polyoxypropylene glycol end-capped with ethylene oxide, a diol such as diethylene glycol, a liquid polyepoxide such as the diglycidyl ether of bisphenol A and a catalyst mixture containing a quaternary ammonium or phosphonium salt and an organometal salt of the metal tin or lead such as tetrabutyl ammonium bromide and lead octoate.
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