Segmented polyurethane resins

Details Segmented polyurethane resins Segmented polyurethane resins

1979-04-02

1980-10-14

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 60, 528 64, C08G 1814

Patent

active

042282497

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, Dec. 21, 1966, p. 9.

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