Patent · US Expired

Process for the preparation of organopolysiloxane foams

US4230820A · kind A · utility

7Cited by

6References

5Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Adolph Maschberger · Burghausen, DE
Peter August · Burghausen, DE

Key dates

Filing date	Mar 2, 1979
Grant date	Oct 28, 1980
Priority date	—
Expiry date	Mar 2, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S528/901
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Organopolysiloxane foams are prepared by heating a mixture containing (A) a diorganopolysiloxane, (B) silicon dioxide having a surface area of at least 50 m.sup.2 /g, (C) a peroxide compound, (D) at least one organosilicon compound containing at least 2 weight percent of Si-bonded hydroxyl groups and (E) at least one organopolysiloxane having Si-bonded hydrogen, to a temperature between 280.degree. and 320.degree. C. at a pressure which does not exceed the pressure of the surrounding atmosphere.

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