Patent · US Expired

Process and device for producing foam using carbon dioxide dissolved under pressure

US5840778A · kind A · utility

4Cited by

12References

7Claims

0Family size

Assignees

BAYER HEALTHCARE LLC · DE
HENNECKE GMBH · DE

Inventors

Ferdinand Althausen · Neunkirchen, DE
Reiner Raffel · Siegburg, DE
Wilfried Ebeling · Neunburg vorm Wald, DE
Robert Eiben · Lampertheim, DE

Key dates

Filing date	May 21, 1997
Grant date	Nov 24, 1998
Priority date	—
Expiry date	May 21, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J9/30
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process is described for producing foam materials from two-component reactive plastics using carbon dioxide as blowing agent by mixing at least one of the reactive components with carbon dioxide under pressure, mixing the components, at least one of which contains carbon dioxide under pressure, expanding the reactive mixture containing carbon dioxide obtained by mixing, and hardening, wherein the expansion takes place suddenly with the production of high rates of shear. Preferably the rate of flow of the reaction mixture is reduced after expansion.

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