Patent · US Expired

1,1,1-Trifluoro-2-chloroethane as blowing agent for polyurethane foam

US4177332A · kind A · utility

9Cited by

3References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Heinz Mitschke · Odenthal, DE
Hans Niederprum · Monheim, DE
Manfred Kapps · Bensberg, DE

Key dates

Filing date	Aug 8, 1978
Grant date	Dec 4, 1979
Priority date	—
Expiry date	Aug 8, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J9/144
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In the production of a foamed synthetic material by the reaction of starting materials which undergo a polymerization, polycondensation or polyaddition reaction to produce a high molecular weight synthetic material in the presence of a blowing agent, e.g. a polyurethane, or by foaming an unfoamed thermoplastic synthetic material by means of a blowing agent, the improvement which comprises employing 1,1,1-trifluoro-2-chloroethane as the blowing agent, optionally in admixture with 1,1-difluoro-2-chloroethane.

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