Process for the preparation of new segmented polyurethane resins

Details Process for the preparation of new segmented polyurethane resins Process for the preparation of new segmented polyurethane resins

1978-02-06

1980-01-29

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521164, 528 60, 528 64, 528 77, 528 79, 528 84, C08G 1850

Patent

active

041862570

ABSTRACT:
This invention relates to new high molecular weight polyurethanes which contain a very small amount of urethane and urea groups. These new synthetic resins are built up as block copolymers and contain relatively high molecular weight segments which are derived from high melting and low melting polyols and linked together through ester and/or urethane and/or urea groups.

REFERENCES:
patent: 3817940 (1974-06-01), Blahak et al.
patent: 3932360 (1976-01-01), Cerankowski et al.
Derwent Report of Japanese Patent Publication 21,934/66.

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