Binding agents for polyurethane-based paints

Details Binding agents for polyurethane-based paints Binding agents for polyurethane-based paints

C - Chemistry, Metallurgy

09

D

C09D 175/04 (2006.01)

Patent

CA 2245858

The invention relates to coating compositions for the production of coatings which are resistant to condensed water and comprise binders based on a polyurethane resin PUR which comprises alpha, omega-polymethacrylate- diols (A) as structural units. The alpha, omega-polymethacrylatediols (A) preferably consist of the monomer units methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-pentyl methacrylate, amyl methacrylate, n-hexyl methacrylate, n-octyl methacrylate, 2- ethylhexyl methacrylate, n-decyl methacrylate, cyclopentyl methacrylate, cyclohexyl methacrylate, 4- tert-butylcyclohexyl methacrylate, cyclooctyl methacrylate, phenyl methacrylate or isobornyl methacrylate or mixtures thereof. The present invention additionally relates to processes for the preparation of such coating compositions and to their preferred use as fillers, basecoats and/or topcoats, especially in connection with automotive production-line finishing and/or refinishing.

L'invention concerne des agents de revêtement pour la production de revêtements résistants à la condensation, contenant des liants à base de résine polyuréthane, cette résine polyuréthane contenant comme motifs structuraux des diols de polyméthacrylate alpha, omega (A). Ces derniers renferment de préférence les unités monomères méthacrylate d'éthyle, méthacrylate de propyle, méthacrylate de n-butyle, méthacrylate d'iso-butyle, méthacrylate de butyle tertiaire, méthacrylate de n-pentyle, méthacrylate d'amyle, méthacrylate de n-hexyle, méthacrylate de n-octyle, méthacrylate de 2-éthylhexyle, méthacrylate de n-décyle, méthacrylate de cyclopentyle, méthacrylate de cyclohexyle, méthacrylate de cyclohexyle de 4-tert-butyle, méthacrylate de cyclooctyle, méthacrylate de phényle ou méthacrylate d'isobornyle ou bien leurs mélanges. La présente invention concerne également un procédé pour la production de tels agents de revêtement, ainsi que leur utilisation préférée comme charges, peintures de base et/ou de finition, notamment pour la peinture en série des automobiles et/ou pour la peinture dans le cadre de la réparation automobile.

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