Process for the preparation of polyurethane foams

Details Process for the preparation of polyurethane foams Process for the preparation of polyurethane foams

1989-08-21

1991-05-21

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1814

Patent

active

050176234

ABSTRACT:
This invention relates to a process for the preparation of polyurethane foams comprising reacting polyisocyanates with compounds containing at least two active hydrogen atoms and having a molecular weight of 400 to 10,000 selected from polymer-modified polyols and polyols containing predominantly primary hydroxyl groups, in the presence of water and/or organic blowing agents, catalysts, and flameproofing agents having the formula ##STR1## in which R.sup.1 and R.sup.2 are independently hydrogen or C.sub.1 -C.sub.4 alkyl;

REFERENCES:
patent: 4221875 (1980-09-01), Yukuta et al.
patent: 4258141 (1981-03-01), Jarre et al.
patent: 4618667 (1986-10-01), Kay et al.
patent: 4810729 (1989-03-01), Davis et al.

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