Patent · US Expired

Crosslinkable protective colloids for use in the polymerization of unsaturated monomers

US6316568A · kind A · utility

5Cited by

4References

3Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Klaus Kohlammer · Marktl, DE
Gerhard Koegler · Altötting, DE
Monika Rockinger · Unterneukirchen, DE
Walter Dobler · Schwetzingen, DE

Key dates

Filing date	Sep 3, 1998
Grant date	Nov 13, 2001
Priority date	—
Expiry date	Sep 3, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2103/0057
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A water-soluble, crosslinkable protective colloid is provided having a weight-average molecular weight of least than 500,000 comprising: a) 20 to 95% by weight of monomer units containing sulphonic acid or sulphonate groups, b) 4 to 80% by weight of monomer units containing N-methylol or N-alkoxymethyl groups, and c) 0.1 to 20% by weight of hydrophobic monomer units such as water insoluble ethylenically unsaturated compounds and the hydrophobic end groups of initiator radicals or regulator molecules. Optionally, up to 50% by weight of the monomer units containing sulphonic acid or sulphonate groups can be replaced by monomer units containing carboxyl groups or monomer units containing amide groups.

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