Redispersible, silicon-modified dispersion powder composition, process for its preparation and its use

US5753733A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Herbert Eck · Burghausen, DE
• Heinrich Hopf · Burghausen, DE
• Klaus Adler · Rheda-Wiedenbrück, DE
• Franz Jodlbauer · Marktl, DE
• Guenter von Au · Burghausen, DE

Key dates

• Filing date: Sep 18, 1996
• Grant date: May 19, 1998
• Expiry date: Sep 18, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D151/003
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention concerns a dispersion powder composition which is redispersible in water and is made from water-insoluble homopolymers or copolymers of preferably ethylenically unsaturated monomers and one or more organosilicon compounds plus, optionally, other additives such as protective colloids and anti-blocking agents. The composition is obtained by: a) polymerizing one or more monomers in the presence of 0.1 to 30% by wt., relative to the total weight of the monomers, of one or more silicon compounds which are dispersible in water and which have a boiling point at normal pressure of >160.degree. C., selected from the group comprising the silanes, polysilanes, oligosiloxanes, polysiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes and polysilylenedisiloxanes and: b) spray-drying the product thus obtained, either before or after addition of the additives mentioned.