Photocurable acrylic coating compositions having good...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 4/06 (2006.01) C08K 5/06 (2006.01) C09D 133/08 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2727618

An abrasion resistant photocurable acrylic coating composition that can provide good adhesion to subsequent coatings deposited thereon, and a hard coated article, especially an optical article such as an ophthalmic lens, comprising a substrate coated with a coating obtained from an abrasion resistant acrylic coating composition providing good subsequent adhesion Said composition comprises adequate amounts of at least one compound having from 5 to 7 acrylate groups, at least one compound having from 3 to 4 acrylate groups, at least one compound having 2 acrylate groups, at least one diepoxy compound, at least one hydrolyzate of an expoxysilane, and at least one non polymerizable ether compound.

L'invention concerne une composition de revêtement acrylique photodurcissable résistant à l'abrasion qui peut présenter une bonne adhérence à des revêtements ultérieurs déposés sur celle-ci et un article dur revêtu, particulièrement un article optique tel qu'une lentille ophtalmique, comprenant un substrat revêtu d'un revêtement obtenu à partir d'une composition de revêtement acrylique résistant à l'abrasion et présentant une bonne adhérence ultérieure. Ladite composition comprend des quantités adéquates d'au moins un composé ayant de 5 à 7 groupes acrylates, d'au moins un composé ayant de 3 à 4 groupes acrylates, d'au moins un composé ayant 2 groupes acrylates, d'au moins un composé diépoxy, d'au moins un hydrolysat d'un époxysilane et d'au moins un composé éther non polymérisable.

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