| abstract |
(57) Abstract: A method for efficiently, reliably and easily producing a polyurethane ionomer in the absence of a solvent, and a golf ball cover material, a sealing material and an adhesive containing the polyurethane ionomer obtained by the method. Offer. A polyurethane ionomer is produced by reacting a polyol with a part of a polyisocyanate and a chain extender having an ionic segment in the absence of a solvent to form a urethane prepolymer, and then reacting with a polyisocyanate. And a cover material for a golf ball, a sealing material and an adhesive containing the polyurethane ionomer. |