Patent · US Expired

Process for the production of flame-resistant, hard polyurethane foams

US4025470A · kind A · utility

2Cited by

5References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karlheinz Andres
Kuno Wagner · Leverkusen, DE
Erwin Hoffmann · Leverkusen, DE
Manfred Kapps · Bensberg, DE

Key dates

Filing date	Apr 24, 1975
Grant date	May 24, 1977
Priority date	—
Expiry date	Apr 24, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0058
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The instant invention relates to a process for the production of flame-resistant, hard foams which contain urethane groups from polyisocyanates, active-hydrogen containing compounds, water and/or organic blowing agents, and flame-retarding agents, the improvement wherein the flame-retarding agent used is a mixture of (a) an addition compound of (1) a mono-alcohol, a polyalcohol, or mixtures thereof, and (2) a lactam, and (b) a phosphorous containing acid or acid ester.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.