Process for the preparation of polyurethane foams
US5104905A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Oct 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5333
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of polyurethane foams comprising reacting polyisocyanates with compounds having a molecular weight of from 400 to 10,000 and containing at least two isocyanate-reactive hydrogen atoms, in the presence of water and/or organic blowing agents, catalysts, melamine having a particle size of from about 5 to about 90 micrometers as a flameproofing agent. The process 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 from 32 to 399, and known surface-active additives and auxiliaries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.