Crosslinking of silicones presence of functionalized silicones
First Claim
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1. A method for fabricating an optical element comprising;
- (a) preparing a first composite comprising a first precursor and a refraction- and/or shape-modifying composition (RSMC);
(b) preparing a second composite comprising a second precursor and a catalyst for the first and second precursors;
(c) combining the first and the second composites to form a reaction mixture;
(d) placing the reaction mixture into a mold;
(e) forming a substantially cross-linked first polymer matrix from said reaction mixture, said substantially crosslinked first polymer matrix having said RSMC dispersed therein, and;
(f) removing the optical element from the mold.
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Abstract
Methods and materials are disclosed for the production of optical elements, in particular intraocular lenses (IOL) that incorporate any amount (0 to 99%) of refraction and/or shape modulating compound into a substantially crosslinked first polymeric matrix. The materials produced according to the inventive methods exhibit certain rheological parameters useful in defining medical lenses. These medical lenses have the ability to change their refractive power via changing the refractive index and/or by altering the shape by stimulus induced polymerization.
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Citations
32 Claims
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1. A method for fabricating an optical element comprising;
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(a) preparing a first composite comprising a first precursor and a refraction- and/or shape-modifying composition (RSMC);
(b) preparing a second composite comprising a second precursor and a catalyst for the first and second precursors;
(c) combining the first and the second composites to form a reaction mixture;
(d) placing the reaction mixture into a mold;
(e) forming a substantially cross-linked first polymer matrix from said reaction mixture, said substantially crosslinked first polymer matrix having said RSMC dispersed therein, and;
(f) removing the optical element from the mold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A fabricated optical element, comprising a reaction product of:
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(a) a first composite, said first composite further comprising at least one polyorganosiloxane molecule having at least two silicone-bonded vinyl radicals per molecule;
(b) a second precursor comprising at least one polyorganosiloxane molecule having at least three silicone-hydride groups per molecule;
(c) a platinum group metal-containing catalysts known to catalyze the addition of silicone-bonded hydrides to silicone-vinyl radicals;
(d) a refraction and/or shape-modifying composition;
said reaction product exhibiting a shear loss modulus, between 1×
104 to about 1.25×
105 Pa over a testing frequency range of from 0.01 radians/second to about 100 radians/second.(e) a UV-absorber(s) - View Dependent Claims (31, 32)
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Specification