C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 77/14 (2006.01) C08F 2/48 (2006.01) C08J 3/28 (2006.01) G02B 1/04 (2006.01)
Patent
CA 2331796
A method for photopolymerizing a monomer mixture to form a lens involves charging to a mold a monomer mixture including lens-forming monomers, and exposing the monomer mixture in the mold to a light source including light in the visible region of the spectrum. The method is useful for monomer mixtures that include a UV- absorbing compound and/or a tinting agent. Preferably, the monomer mixtures include a polymerization initiator including a phosphine oxide moiety.
L'invention porte sur un procédé de photopolymérisation d'un mélange de monomères pour former une lentille consistant à charger un moule d'un mélange de monomères devant constituer la lentille puis à exposer ledit mélange à une source lumineuse comportant de la lumière de la région du spectre visible. Ledit procédé s'applique à des mélanges de monomères comportant des composés absorbant l'UV et/ou un agent colorant. Le mélange de monomères comporte de préférence un initiateur de polymérisation comprenant un fragment d'oxyde de phosphine.
Bausch & Lomb Incorporated
Osler Hoskin & Harcourt Llp
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