Initiator and ultraviolet absorber blends for changing lens power by ultraviolet light
AssigneeCalhoun Vision, Inc.
InventorsJagdish Jethmalani, Shiao Chang, Robert Grubbs
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Abstract
Novel blends of photo-initiators and photo-absorbers are disclosed. By the proper selection of the type and amount of absorber and initiator used in a composition, it is possible to regulate the conditions under which photo-induced reactions occur. In a specific embodiment, blends of UV initiators and photoabsorbers are used to control the conditions under which UV initiated polymerization occurs.
Claims11
A blend of photoabsorber and photoinitiator wherein the photoabsorber comprises of one or more UV absorbers bonded to at least one polymer bridge with 2-28 monomer units and the photoinitiator comprises one or more UV initiators bonded to at least one polymer bridge with from 2-28 monomer units.
A blend of a silicon bonded photoabsorber and a silicon bonded photoinitiators wherein the a silicon bonded photoinitiator has the general formula:
- wherein at least one of R12-R16 is a UV initiator having the general formula:
- wherein R3 is H, alkyl radical, aryl radical, substituted alkyl, or substituted aryl radical, and R4 is H, alkyl radical, aryl radical, substituted alkyl or substituted aryl radical. R5 is a phenyl or substituted phenyl and R6 contains an allyl or allyloxy group.
- wherein R7 and R10 are independently selected from the group consisting of hydrogen, alkyls, aryl, heteroalkyls, and
- have p as an integer of from 2 to 28, and
- a silicon bonded photoabsorber having the general formula
- where at least one of R12 to R16 is a UV absorber having the formula
- wherein X is independently selected from the group consisting of H, monovalent hydrocarbon radicals and monovalent substituted hydrocarbon radicals preferably containing 1 to about 8 carbon atoms, hydroxyl radicals, amino radicals, carboxyl radicals alkoxy radicals and substituted alkoxy radicals, preferably containing 1 to 6 carbon atoms and halogen radicals;
- each R1 is independently selected from the group consisting of H, alkyl radicals, substituted alkyl radicals, alkoxy radicals, substituted alkoxy radicals and R2 is selected from the group comprising vinyl, allyl, alkenyl, substituted alkenyl, alkenoxy, substitute alkenyoxy, acryloxy alkyl, substituted acryloxy, acrylate, methacrylate, and silicone, n is an integer of from 1 to 4 and m is an integer of from 1 to 3.
Dependencies are inferred from the claim text.