Patent · US Expired

Method of manufacturing aqueous solutions of alkali polysilicates

US3984526A · kind A · utility

5Cited by

4References

8Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Rainer Haase · Nortorf, DE
Volker Hunger
Arnold Lenz · Kornwestheim, DE

Key dates

Filing date	Aug 12, 1974
Grant date	Oct 5, 1976
Priority date	—
Expiry date	Aug 12, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D183/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree.C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.

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