Patent · US Expired

Surfactants for incorporating silica aerogel in polyurethane foams

US6121336A · kind A · utility

33Cited by

26References

7Claims

0Family size

Assignee

BASF SE

Inventors

Michael O. Okoroafor · Export, US
Alan E. Wang · Hoffman Estates, US
Bulent E. Yoldas · Wilkinsburg, US

Key dates

Filing date	Jun 28, 1994
Grant date	Sep 19, 2000
Priority date	—
Expiry date	Jun 28, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2483/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Polyurethane foams prepared using polysiloxane/polyoxyalkylene surfactants, preferably blended with a viscosity modifying agent, particularly in combination with particulate silica, especially silica aerogel, exhibit improved thermal insulating capacity, as measured by K-factor, and improved closed cell content, without increasing the density of the polyurethane foam.

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