Patent · US Expired

Organopolysiloxane-alkyltrialkoxysilane emulsions for impregnating structural fibre-reinforced cement components

US5443627A · kind A · utility

10Cited by

5References

2Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Gunter von Au · Burghausen, DE
Dieter Gerhardinger · Burghausen, DE

Key dates

Filing date	Aug 20, 1993
Grant date	Aug 22, 1995
Priority date	—
Expiry date	Aug 20, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2383/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention concerns aqueous emulsions of (A) organopolysiloxane free from basic nitrogen and (B) alkyltrialkoxysilane which contain (C) an emulsifier and (D) water. Organopolysiloxane (A) has formula R.sub.a Si(OR.sup.1).sub.b O.sub.4-a-b/2 wherein R has identical or different, monovalent, optionally substituted C.sub.1 -C.sub.18 hydrocarbon residues bonded by SiC, R.sup..sup.1 has identical or different, monovalent, optionally substituted C.sub.1 -C.sub.6 hydrocarbon residues, a is equal to 0, 1, 2 or 3, on average 0.75 to 1.5, and b is equal to 1, 2 or 3, on average 0.2 to 2.0, and has a molecular weight of at least 600 g/mol. Also disclosed are a method for preparing said emulsions and their use for water-repellent impregnation of cement-bonded fibrous building components.

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