Patent · US Expired

Production of rigid foams based on isocyanate

US5624969A · kind A · utility

13Cited by

10References

18Claims

0Family size

Assignee

BASF SE

Inventors

Holger Seifert · Bad Driburg, DE
Renate Hempel · Ruhland, DE
Gottfried Knorr · Schwarzheide, DE
Udo Rotermund · Ortrand, DE

Key dates

Filing date	Jul 10, 1996
Grant date	Apr 29, 1997
Priority date	—
Expiry date	Jul 10, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a process for producing rigid foams based on isocyanate, the blowing agent used is a mixture of at least one low-boiling hydrocarbon having from 3 to 7 carbon atoms, low molecular weight monohydric alcohols containing primary or secondary hydroxyl groups and having from 1 to 4 carbon atoms, and, if desired, the carbon dioxide formed from water and isocyanate. The rigid foams can be used as insulation material.

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