Utilization of lactones and lactams in the preparation of polyur

Details Utilization of lactones and lactams in the preparation of polyur Utilization of lactones and lactams in the preparation of polyur

1987-06-09

1988-07-12

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

12146B, 12146BP, 521130, 521159, 521160, 521161, 521155, 521166, C08G 1814

Patent

active

047570954

ABSTRACT:
Lactones and lactams are utilized in the preparation of urethane modified prepolymers based on diphenylmethane diisocyanate, uretonimine-modified diphenylmethane diisocyanate. The prepolymers are then employed to prepare microcellular foams suitable for shoe soles and cast polyurethane products.

REFERENCES:
patent: 4195148 (1980-03-01), Hagen
patent: 4234445 (1980-11-01), Hagen

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