Process of coating a mineral molding with an aqueous preparation comprising, as film-forming constituent, at least one polymer P

US6472024B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Manfred Schwartz · Bischofswerda, DE
• Bertold Bechert
• Harm Wiese · Heidelberg, DE
• Wolfgang Hümmer · Birkenheide, DE

Key dates

• Filing date: Jul 9, 1999
• Grant date: Oct 29, 2002
• Expiry date: Jul 9, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of coating a mineral molding includes applying at least one aqueous preparation to at least one surface of the molding, the aqueous preparation including:(i) as film-forming constituent at least one polymer P which is composed of ethylenically unsaturated monomers M and which is present in dispersed form in the aqueous phase of the aqueous preparation and which has a glass transition temperature TG in the range from −25 to +80° C.;(ii) at least one anionic emulsifier selected from the group consisting of (a), (b), and (c):(a) salts of formula I:Alk−{O—Et}n—OSO2O−M+  (I) whereinAlk is linear or branched, saturated alkyl having from 10 to 18 carbon atoms,Et is 1,2-ethylene,n is an integer from 25 to 40, andM+ is a monovalent cation or a cation equivalent,(b) mixtures of salts of formula I; and(c) mixtures of salts of formula I with other anionic emulsifiers, wherein the salts of formula I make up at least 80% by weight of the anionic emulsifiers; and(iii) at least one nonionic emulsifier.