Microstructure-bearing articles of high refractive index
First Claim
1. An optical article having a surface with a replicated microstructure comprising a plurality of utilitarian discontinuities having an optical purpose,said optical article comprising an organic resin having a haze rating corresponding to a value, as determined by ASTM procedure D1003 on a flat film 3.2 mm thick on a bisphenol A polycarbonate substrate, of up to 5% and said resin being prepared by curing a radiation curable composition comprising:
- (A) at least one oligomeric urethane multi(meth)acrylate, optionally in combination with at least one other monomer effective to reduce viscosity, improve thermomechanical properties or increase refractive index;
(B) nanoparticles of at least one ethylenically unsaturated metal compound selected from the group consisting of tetravalent titanium and tetravalent zirconium compounds; and
(C) at least one photoinitiator.
3 Assignments
0 Petitions
Accused Products
Abstract
Blends of oligomeric urethane multi(meth)acrylate; optionally at least one other monomer selected from the group consisting of acrylic monomers, styrenic monomers and ethylenically unsaturated nitrogen heterocycles, preferably a polyol multi(meth)acrylate; and nanoparticles of an ethylenically unsaturated, preferably (meth)acrylic-functionalized, titanium or zirconium compound can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having high refractive indices, haze ratings of at most 5% and other properties which may be tailored according to the desired use.
153 Citations
25 Claims
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1. An optical article having a surface with a replicated microstructure comprising a plurality of utilitarian discontinuities having an optical purpose,
said optical article comprising an organic resin having a haze rating corresponding to a value, as determined by ASTM procedure D1003 on a flat film 3.2 mm thick on a bisphenol A polycarbonate substrate, of up to 5% and said resin being prepared by curing a radiation curable composition comprising: -
(A) at least one oligomeric urethane multi(meth)acrylate, optionally in combination with at least one other monomer effective to reduce viscosity, improve thermomechanical properties or increase refractive index;
(B) nanoparticles of at least one ethylenically unsaturated metal compound selected from the group consisting of tetravalent titanium and tetravalent zirconium compounds; and
(C) at least one photoinitiator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An optical article having a surface with a replicated microstructure comprising a plurality of utilitarian discontinuities having an optical purpose,
said optical article comprising an organic resin having a haze rating corresponding to a value, as determined by ASTM procedure D1003 on a flat film 3.2 mm thick on a bisphenol A polycarbonate substrate, of up to 5% and an abrasion rating, as determined by ASTM procedure D968, no greater than 20, and said resin being prepared by curing a radiation curable composition comprising: -
(A) a reaction product of 2,2,4-trimethylhexane 1,6-diisocyanate, polycaprolactone diol and 2-hydroxyethyl methacrylate;
(B) nanoparticles of at least one 3-methacryloxypropyltrimethoxysilane-functionalized titanium compound; and
(C) at least one photoinitiator. - View Dependent Claims (23, 24, 25)
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Specification