Birch, Stewart, Kolasch & Birch, LLP
Polyether polyurethane
Disclosed is a polyether polyurethane comprising (A) at least one polyisocyanate having two or more isocyanate groups, which is selected from the group consisting of an aromatic polyisocyanate and an aliphatic polyisocyanate; (B) a polyoxytetramethylene glycol (PTMG) having a number average molecular weight of from 500 to 4,000, a molecular weight distribution (Mw/Mn) of 1.75 or less, and a content of high molecular weight PTMG molecules of 10% by weight or less; and (C) at least one chain extender selected from the group consisting of a C2-C10 polyol having two or more hydroxyl groups and a C2-C10 polyamine having two or more amino groups. Also disclosed is a urethane prepolymer which comprises the above-mentioned components (A) and (B) and which has terminal isocyanate groups.
Asahi Kasei Kabushiki Kaisha
C C C C C C
C08G C08G C08G C08G C09D C08G
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Atsushi Yoshiyuki Mutsuhisa Kiyoo
Shimizu Asahina Furukawa Kato