Non-aqueous coating composition based on an oxidatively...

C - Chemistry – Metallurgy – 09 – D

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C09D 167/08 (2006.01) C08J 3/24 (2006.01) C08K 5/521 (2006.01) C09D 7/12 (2006.01) C08G 63/49 (2006.01)

Patent

CA 2323795

Proposed is a non-aqueous coating composition based on an oxidatively drying alkyd resin and a photo-initiator, where an acid or latent acid and one or more compounds of the group of vinyl ethers, acetals, and alkoxysilanes which are reactive in the presence of an acid are incorporated into the coating composition, said vinyl ethers, acetals, and alkoxysilanes preferably being covalently bonded to the alkyd resin. The ratio of the number of oxidatively drying groups present in the alkyd resin to the number of groups reactive in the presence of an acid preferably is in the range of 1/10 to 15/1. The acid preferably is the phosphoric acid dibutyl ester.

La présente invention concerne une composition de revêtement non aqueuse à base de résine alkyde à séchage oxydatif et d'un photoamorceur, dans laquelle on incorpore un acide ou un acide latent et un ou plusieurs composés du groupe d'éthers vinyliques, d'acétals, et d'alcoxysilanes qui réagissent en présence d'acide, lesdits éthers vinyliques, acétals et alcoxysilanes étant de préférence liés par covalence à la résine alkyde. Le rapport entre le nombre de groupes à séchage oxydatif présents dans la résine alkyde et le nombre de groupes réactifs en présence d'un acide est, de préférence, compris entre 1/10 et 15/1. L'acide préféré est l'ester de dibutyle d'acide phosphorique.

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