Tintable cross-linkable compositions

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 265/06 (2006.01) C08F 290/06 (2006.01) C08L 51/00 (2006.01)

Patent

CA 2218678

A cross-linkable polymeric casting composition capable of producing an optical article exhibiting improved tint rate, the casting composition including a polyalkylene glycol diacrylate or dimethacrylate; a urethane monomer having terminal acrylic and/or methacrylic groups; and a monomer including a recurring unit derived from at least one radical-polymerisable bisphenol monomer capable of forming a homopolymer having a high refractive index; and/or a tri- or tetra-functional vinyl, acrylic or methacrylic monomer, the cross-linkable polymeric casting composition being modified to reduce the rigidity of the optical article formed therefrom, and/or increase the chemical affinity of the components of the casting composition to a dye material.

L'invention porte sur une composition de moulage à polymères réticulables à mème de fabriquer un article optique présentant un taux de nuançage amélioré. La composition de nuançage comprend les éléments suivants: un polyalkylène glycol diacrylate ou diméthacrylate, un monomère d'uréthane à groupes terminaux acryliques et/ou méthacryliques; un monomère comprenant une unité récurrente obtenue à partir d'au moins un monomère de bisphénol à polymérisation radicalaire à même de former un homopolymère ayant un indice de réfraction élevé, et/ou un monomère vinylique, acrylique ou méthacrylique tri ou tétra fonctionnels. La composition de moulage à polymères réticulables est modifiée pour diminuer la rigidité de l'article optique auquel elle donne forme, et/ou pour augmenter l'affinité chimique des constituants de la composition de moulage pour une matière tinctoriale.

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