Stable prepolymers of polyisocyanate with hydroxyl functions, a

Details Stable prepolymers of polyisocyanate with hydroxyl functions, a Stable prepolymers of polyisocyanate with hydroxyl functions, a

1984-12-19

1986-07-15

Cockeram, Herbert S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 521914, C08G 1814, C08G 1850

Patent

active

046007300

ABSTRACT:
Stable polyisocyanate prepolymers containing hydroxy functions, consisting of products of polyaddition of at least one organic polyisocyanate to at least one product of condensation (A) of an alkylene oxide with an amine, in the presence of at least one polyol (B) containing free hydroxy functions, in which the said polyol (B) contains primary hydroxy functions and has a molecular weight greater than or equal to 3,000.
The process for their manufacture consists in reacting, at a temperature between 10.degree. and 150.degree. C., and more usually between 20.degree. and 80.degree. C., the mixture of at least one organic polyisocyanate, at least one condensation product (A) and at least one polyol (B).

REFERENCES:
patent: 3336242 (1967-08-01), Hampson et al.
patent: 3468819 (1969-09-01), Szabat
patent: 3887505 (1975-06-01), Demon et al.
patent: 4388420 (1983-06-01), McBrayer
patent: 4451662 (1984-05-01), DiDomenico
patent: 4469822 (1984-09-01), Stolz et al.

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