C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 4/00 (2006.01) C08F 2/44 (2006.01) C08J 3/24 (2006.01) C09D 7/12 (2006.01)
Patent
CA 2159331
A coating composition comprising (a) a crosslinking polymerizable compound (a-1) having at least two (meth)acryloyloxy groups in the molecule, or a mixture of this compound (a-1) and a compound (a-2) copolymerizable therewith, (b) finely divided silica having its surfaces modified by a hydrolyzate of a mixture composed of a silane compound (b-1) capable of forming a bond with component (a), and a silane compound (b-2) incapable of forming a bond with component (a), and (c) a high-energy radiation polymerization initiator. This coating composition can form a cured film having high surface hardness and excellent weather resistance, and can be applied in solventless form.
L'invention concerne une composition de revêtement comprenant: a) un composé polymérisable de réticulation (a-1) présentant au moins deux groupes (méth)acroyloxy dans sa molécule ou un mélange du composé (a-1) et d'un composé (a-2) copolymérisable avec ce mélange; b) de fines particules de silice dont on a modifié la surface en utilisant l'hydrolysat d'un mélange d'un composé d'hydrure de silicium (b-1) capable de se fixer au composant (a) et d'un autre composé d'hydrure de silicium (b-2), incapable de s'y fixer; et c) un amorceur pour une polymérisation induite par rayonnement actinique. On peut, à partir de cette composition, obtenir un revêtement durci à haute résistance superficielle, à excellente stabilité aux agents atmosphériques et applicable sans solvant.
Ige Hitoshi
Watanabe Hiroyuki
Yanagase Akira
Mitsubishi Rayon Co. Ltd.
Sim & Mcburney
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