Crosslinkable powder composition which is redispersible in water

US6063865A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Peter Ball · Emmerting, DE
• Herbert Eck · Burghausen, DE

Key dates

• Filing date: Jul 30, 1998
• Grant date: May 16, 2000
• Expiry date: Jul 30, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/0057
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A crosslinkable powder composition is provided which is redispersible in water and comprises a) from 30 to 95 parts by weight of one or more water-insoluble, film-forming polymers of free-radically polymerizable, ethylenically unsaturated monomers, where from 0.5 to 10% by weight of the monomers, based on the total weight of the polymer a), are ones having one or more substituents selected from the group consisting of aldehyde, keto, epoxide, isocyanate, carboxylic anhydride and aziridine groups, b) from 5 to 70 parts by weight of one or more water-soluble, film-forming polymers, where the parts by weight of a) and b) add up to 100 parts by weight, and c) one or more compounds containing at least two functional groups which are present in salt form and are selected from the group consisting of amines, hydrazides, hydroxylamine esters, aryl- and alkylhydrazines or -hydrazones.