Process for the preparation of polyurethane foams
US5017623A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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; PA1 X is --(CH.sub.2).sub.n -- wherein n is an integer of from 0 to 5 (preferably 0 or 1), --CH.dbd.CH--, a branched alkylene group, an arylene group, or (NH).sub.m wherein m is 1 or 2; PA1 Y is --CN or ##STR2## wherein R.sup.1 and R.sup.2 are as defined above or both R.sup.2 together form a bond. The reaction is optionally carried out in the presence of other flameproofing agents, compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 32 to 399, and known surface-active additives and auxiliaries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.