Patent · US Expired

Process for preparing rigid foamed materials containing urethane groups

US6509387B1 · kind B1 · utility

0Cited by

2References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl Werner Dietrich · Odenthal, DE
Norbert Eisen · Hanerau-Hademarschen, DE
Gerhard Heilig · Bensberg, DE

Key dates

Filing date	Jun 4, 1998
Grant date	Jan 21, 2003
Priority date	—
Expiry date	Jun 4, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The description relates to production of rigid foamed plastics containing urethane groups, by use of a blowing-agent mixture containing 5 to 50 parts by weight of C3 and/or C4 alkanes and 50 to 95 parts by weight of cyclopentane. There is also a description of use of the thus-produced rigid foamed plastics as composite components or for foam filling of cavities in refrigerator construction.

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