Coating composition

C - Chemistry – Metallurgy – 09 – D

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C09D 167/08 (2006.01)

Patent

CA 2347823

A coating composition comprises a solvent, an alkyd resin, and a vinylic star polymer comprising the residue of a polyfunctional thiol compound having at least three functional thiol groups and at least three vinylic chains each comprising the residue of at least one monofunctional vinylically unsaturated monomer. The vinylic star polymer is soluble in the alkyd resin solution and produces solutions of relatively low viscosity compared to linear acrylic polymers.

Cette composition de revêtement comprend un solvant, une résine alkyde, un dendrimère vinylique comprenant un composé thiol plurifonctionnel possédant au moins trois groupes thiol fonctionnels et au moins trois chaînes vinyliques, chacune comprenant le reste d'au moins un monomère monofonctionnel, à insaturation vinylique. Le dendrimère vinylique est soluble dans la solution de résine alkyde et il permet d'obtenir des solutions de viscosité relativement faible par rapport à des polymères acryliques linéaires.

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