C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/06 (2006.01) C08G 18/62 (2006.01) C08G 18/65 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C09D 175/06 (2006.01)
Patent
CA 2076236
Mo3769 LeA 28,569 BINDER MIXTURES FOR TWO-COMPONENT POLYURETHANE COATING COMPOSITIONS ABSTRACT OF THE DISCLOSURE The present invention relates to binder mixtures for two-component polyurethane coating compositions which dry at room temperature and contain a) a polyisocyanate component, b) a hydroxy-functional polyacrylate component based on a mixture of at least two hydroxyl group-containing poly(meth)acrylate resins i) having a molecular weight (Mn) of 1000 to 100,000, ii) having an at least bimodal molecular weight distribution, iii) prepared by radical copolymerization of olefinically unsaturated monomers in a solvent using monomer mixtures containing less than 50% by weight of monomers carrying hydroxyl groups and iv) wherein the hydroxyl group content of the component having the lowest molecular weight is at least 1.5 times the hydroxyl group content of the component having the highest molecular weight, c) optionally reactive diluents, wherein components a) and b) are present in an amount which corresponds to an NCO/OH equivalent ratio of 0.2:1 to 5:1.
Brahm Martin
Hovestadt Wieland
Margotte Dieter
Meixner Juergen
Wamprecht Christian
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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