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

1985-01-22

1986-06-17

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, 528 78, C08G 1814, C08G 1832

Patent

active

045957126

ABSTRACT:
Stable polyisocyanate prepolymers containing hydroxy functions. The prepolymers are products of the polyaddition of at least one organic polyisocyanate with at least one condensation product (A) of an alkylene oxide with an amine, in the presence of at least one polyol (B) containing free hydroxy functions. The polyol (B) contains no primary hydroxy functions and has a molecular weight of at least 1,300.
The process for the manufacture of these prepolymers reacts, at a temperature between about 10.degree. and about 150.degree. C., the mixture of at least one organic polyisocyanate, at least one condensation product (A), and at least one polyol (B).

REFERENCES:
patent: 3049515 (1962-08-01), Damusis
patent: 3072582 (1963-01-01), Frost
patent: 3446848 (1969-05-01), Aitken et al.
patent: 3763111 (1973-10-01), Fijal

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