Takeda Chemical Industries, Inc.

Kenji Kudo

Tsutomu Kubota

Yasuyuki Kajita

A method for producing a polyurethane elastomer which comprises reacting (1) either a polyisocyanate and a polyol or an isocyanate-terminated prepolymer obtainable by reacting said polyisocyanate with said polyol with (2) a diol of general formula ##STR1## wherein A.sub.1 and A.sub.2 are the same or different and each represents a bond, --O-- or --COO--; R.sub.1 and R.sub.2 are the same or different and each represents C.sub.1-6 alkylene; X.sub.1 and X.sub.2 are the same or different and each represents H or hydroxyalkyl and (3) a triol having a hydroxyl equivalent of 60 to 500, gives a polyurethane elastomer with improved tensile strength, tear strength and other mechanical properties.

Growing community of inventors

Suita, Japan

Kenji Kudo