Use of copolymers with diphenylethylene units as emulsifiers for the production of powder slurry and coating powder for use in coating materials, adhesives and sealants, e.g. for painting cars

摘要

The use as emulsifiers, of copolymers of (a) olefinically unsaturated monomers and (b) poly-substituted ethylenes in which at least two of the substituents are aryl groups. The use of copolymers (A) as emulsifiers. Copolymers (A) are obtained by the single- or multi-stage radical copolymerization in aqueous medium of (a) olefinically unsaturated monomer(s) and (b) other unsaturated monomer(s) of formula (I). R1R2C=CR3R4 (I) R1-R4 = H or optionally substituted alkyl, cycloalkyl, alkylcycloalkyl, cycloalkyl-alkyl, aryl, alkylaryl, cycloalkylaryl, aralkyl or arylcycloalkyl, with the proviso that at least two of these R groups are optionally substituted aryl, aralkyl or arylcycloalkyl, preferably optionally substituted aryl groups. Independent claims are also included for: (1) coating powder suspensions (powder slurries) and coating powders obtained by emulsifying liquid component(s) containing liquid starting material(s) in an aqueous medium using an emulsifier with a surface tension of more than 30 mN/m in aqueous solution at the critical micelle-forming concentration, cooling to form a suspension of dimensionally stable particles (slurry) and isolating the particles (powder) (2) a method as described in (1) for the production of powder slurries and coating powder.