Preparation of thermoplastic polyurethanes

Details Preparation of thermoplastic polyurethanes Preparation of thermoplastic polyurethanes

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/08 (2006.01) C08G 18/32 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2267629

In a process for preparing polyisocyanate polyaddition products by reacting (a) isocyanates with (b) compounds which are reactive toward isocyanates and have a molecular weight of from 451 to 8000 in the presence of (c) chain extenders and, if desired, (d) crosslinkers, (e) catalysts and/or (f) customary auxiliaries and/or additives, use is made of 1,3- and/or 1,2-propanediol as chain extender (c) and the reaction is carried out at an index of ~104.

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