Patent · US Expired

Method for producing polymers stabilized with protective colloids

US6300403A · kind A · utility

39Cited by

4References

11Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Theo Mayer · Julbach, DE
Hans-Peter Weitzel · Reischach, DE
Reinhard Haerzschel · Burghausen, DE
Thomas Bastelberger · Emmerting, DE

Key dates

Filing date	Nov 19, 1999
Grant date	Oct 9, 2001
Priority date	—
Expiry date	Nov 19, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F236/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A method for producing protective-colloid-stabilized polymers in the form of their aqueous polymer dispersions or in the form of powders which can be re-dispersed in water, wherein one or several monomers from the group made up of vinyl aromatics, 1.3 dienes, acrylic acid esters and methacrylic acid esters of alcohols with 1 to 15 C-atoms are polymerized in the presence of a combination of protective colloids consisting of one or several protective colloids from the group of hydrophobically modified, partly saponified polyvinyl esters which produce a surface tension of .ltoreq.40 mN/m as a 2% aqueous solution, and one or several protective colloids which produce a surface tension of >40 mN/m as a 2% aqueous solution.

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