Photochromic polymerizable compositions

Details Photochromic polymerizable compositions Photochromic polymerizable compositions

C - Chemistry, Metallurgy

09

K

C09K 9/02 (2006.01) C03C 17/32 (2006.01) C08G 18/44 (2006.01) C08G 18/81 (2006.01) C08G 64/02 (2006.01) C09D 4/06 (2006.01) G02B 1/04 (2006.01) G02B 1/10 (2006.01) G02B 5/23 (2006.01)

Patent

CA 2466316

Described is a polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. The polymerizable composition optionally contains copolymerizable monomers. Also described are photochromic polymerizates, e.g., photochromic optical elements such as ophthalmic lenses, prepared from the polymerizable composition of the present invention.

L'invention porte sur une composition polymérisable constituée d'une certaine quantité d'au moins un photochrome, d'au moins un matériau possédant au moins un groupe carbonate et au moins un groupe hydroxyle et d'au moins un matériau renfermant un monoisocyanate et possédant au moins un groupe insaturé. La composition polymérisable peut éventuellement renfermer des monomères copolymérisables. L'invention porte également sur des polymérisats photochromes, à savoir des éléments optiques photochromes tels que des lentilles ophtalmiques préparées à partir de la composition polymérisable de cette invention.

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