Thermoplastic polyurethane prepared from a poly-1,2-propylene et

Details Thermoplastic polyurethane prepared from a poly-1,2-propylene et Thermoplastic polyurethane prepared from a poly-1,2-propylene et

1979-06-25

1980-12-16

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C08G 1848

Patent

active

042398797

ABSTRACT:
A thermoplastic, linear and segmented poly-1,2-propylene ether urethane having a Tg of below about -30.degree. C. for the poly-1,2-propylene ether segments is made by reacting poly-1,2-propylene glycol having a high molecular weight; ethylene glycol, 2,3-butane diol or neopentyl glycol or mixture thereof; and 2,4-tolylene diisocyanate containing from about 55 to 100% by weight of the 2,4-isomer with the balance being the 2,6-isomer.

REFERENCES:
patent: 3356650 (1967-12-01), McElroy
patent: 3427256 (1969-02-01), Milgrom
patent: 3525717 (1970-08-01), Butler et al.
patent: 3829505 (1974-08-01), Herold
patent: 3901852 (1975-08-01), Shah
patent: 3925319 (1975-12-01), Hiatt et al.
patent: 4098772 (1978-07-01), Bonk et al.
patent: 4124572 (1978-11-01), Mso
patent: 4169196 (1979-09-01), Ehrlick et al.

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