Patent · US Expired

Process for preparing water-redispersible powder compositions comprising organosilicon compounds

US6020403A · kind A · utility

13Cited by

6References

3Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Herbert Eck · Burghausen, DE
Reiner Figge · Ampfing, DE
Richard Weidner · Burghausen, DE

Key dates

Filing date	Sep 14, 1998
Grant date	Feb 1, 2000
Priority date	—
Expiry date	Sep 14, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2383/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process is provided for the preparation of powder compositions, containing organosilicon compounds and redispersible in water, by spray drying of an aqueous mixture containing one or a plurality of organosilicon compounds and one or a plurality of water-soluble organopolymers in the presence of antiblocking agents. The invention is characterized in that a portion of the antiblocking agent is conveyed to the dried powder stream, as long as it is still suspended in the stream of gas, or the remainder of the antiblocking agent is added to the dried powder.

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