Patent · US Expired

Process for the preparation of cellular polymers having urethane groups, isocyanurate groups, or both

US4302551A · kind A · utility

16Cited by

4References

23Claims

0Family size

Assignee

BASF SE

Inventors

Peter Horn · Heidelberg, DE
Anton Hesse · Weinheim, DE
Peter Weyland
Wolfgang Straehle · Heidelberg, DE
Matthias Marx · Fürstenfeldbruck, DE

Key dates

Filing date	Dec 22, 1980
Grant date	Nov 24, 1981
Priority date	—
Expiry date	Dec 22, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2250/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention relates to a process for preparing cellular polymers having urethane groups, isocyanurate groups, or both. The cellular polymers are prepared by reacting an organic polyisocyanate with certain polymer dispersions in the presence of a blowing agent. The polymer dispersions comprise PA1 (a) as a continuous phase, a polyol having a functionality of 2 to 8 and a hydroxyl number of 150 to 700; and PA1 (b) as a dispersed phase, an organic compound having PA2 (a) at least one Zerewitinoff active hydrogen atom, PA2 (b) a melting point of 30.degree. C. to 260.degree. C., and PA2 (c) a molecular weight of 178 to 100,000.

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