Method for the manufacture of low-melting polyurethanes having i

Details Method for the manufacture of low-melting polyurethanes having i Method for the manufacture of low-melting polyurethanes having i

1980-01-30

1981-06-16

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...

528 76, 528 80, 528 83, C08G 1832

Patent

active

042739110

ABSTRACT:
The invention described herein relates to a method for preparing a low-melting polyurethane which comprises the reaction of at least one diisocyanate, at least one polyol having a molecular weight between 500 and 5000, at least one diol which is branched or includes an ether group, and at least one diol which is unbranched. The diols have a molecular weight of less than about 500. The hydroxyl group content of the reaction mixture exceeds or equals the isocyanate content of the reaction mixture.

REFERENCES:
patent: 3252848 (1966-05-01), Borsellino
patent: 3401133 (1968-09-01), Grace et al.
patent: 3428609 (1969-02-01), Chilvers et al.
patent: 3684639 (1972-08-01), Keberle et al.
patent: 3761439 (1973-09-01), Ward et al.
patent: 3775354 (1973-11-01), Hostettler et al.
patent: 4098772 (1978-07-01), Bonk et al.
patent: 4160686 (1979-07-01), Niederdellmann et al.

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