PHOTOCHROMIC POLYDIORGANOSILOXANE VINYLIC CROSSLINKERS

The invention provides a class of photochromic polydiorganosiloxane vinylic crosslinkers. Each of the photochromic polydiorganosiloxane vinylic crosslinkers of the invention comprise (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and photochromic siloxane unit having one...

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Bibliographische Detailangaben
Hauptverfasser:	Lang, Weihong, Chang, Yuan, Zhang, Steve Yun, Ge, Junhao
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention provides a class of photochromic polydiorganosiloxane vinylic crosslinkers. Each of the photochromic polydiorganosiloxane vinylic crosslinkers of the invention comprise (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and photochromic siloxane unit having one methyl substituent and one organic substituent having a photochromic moiety that capable of undergoing a reversible color change upon exposure to UV-irradiation or high-energy-violet light; (2) two terminal ethylenically-unsaturated groups. The invention also provides a soft photochromic contact lens, especially a photochromic silicone hydrogel contact lens, which comprises a crosslinked polymeric material comprising repeating units of at least one of such a class of photochromic polydiorganosiloxane vinylic crosslinkers. The invention further provides a method of producing a photochromic contact lens from a polymerizable composition comprising at least one of such a class of photochromic polydiorganosiloxane vinylic crosslinkers.