公开(公告)号：US3875118A

公开(公告)日：1975-04-01

申请号：US40078273

申请日：1973-09-26

Applicant: BAYER AG

Inventor： MEISERT ERNST ,  GOYERT WILHELM

IPC: D06N3/14 ,  C08G18/00 ,  C08G18/10 ,  C08G18/72 ,  C09D5/03 ,  C09D175/04 ,  D06M15/564 ,  D06M15/568 ,  D06M15/693 ,  C08G22/06 ,  C08G53/00 ,  C08G53/16

CPC classification number: C08G18/10 ,  C08G18/3206 ,  C08G18/7671 ,  C08G18/70

Abstract: WHERE R is a divalent group such as can be obtained by removing the hydroxyl groups from a diol which has a molecular weight of between 700 and 1750, and Q is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic group which contains 2 to 20, and preferably, 4 to 15, carbon atoms; but Q

Polyurethane elastomers suitable for coating textiles, leather, paper and similar substrate and a multi-stage process for their production. The polyurethane elastomers are obtained from A. A POLYOL WITH AN AVERAGE MOLECULAR WEIGHT BETWEEN 900 AND 5300, B. 4,4''-DIISOCYANATODIPHENYLMETHANE AND C. A DIOL WITH A MOLECULAR WEIGHT BELOW 500, CHARACTERIZED IN THAT THE EQUIVALENT RATIO ((B)/(A)+(C)) IS BETWEEN 0.87 AND 1 AND IN THAT (A) CONTAINS AT LEAST 40% BY WEIGHT OF A POLYURETHANE OF THE FORMULA