The present invention is a compound of Formula I: where R1-R3, m, and n, are defined herein. The compound of the present invention is useful as an intermediate for photoinitiator that is soluble in an ethylenically unsaturated organopolysiloxane.

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The present invention is a compound of Formula I: where R1-R3, m, and n, are defined herein. The compound of the present invention is useful as an intermediate for photoinitiator that is soluble in an ethylenically unsaturated organopolysiloxane.

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The invention provides a class of hydrophilized polydiorganosiloxane vinylic crosslinkers. Each of the hydrophilized polydiorganosiloxane vinylic crosslinkers of the invention comprise (1) a polydiorganosiloxane segment comprising dimethylsiloxane units and hydrophilized siloxane units each having one methyl substituent and one organic substituent having a phosphorylcholine moiety; (2) ethylenically-unsaturated groups. The invention also provides a silicone hydrogel contact lens, which comprises a crosslinked polymeric material comprising repeating units of at least one of such a class of hydrophilized polydiorganosiloxane vinylic crosslinkers. The invention further provides a method of producing a hydrophilized contact lens from a polymerizable composition comprising at least one of such a class of hydrophilized polydiorganosiloxane vinylic crosslinkers.

The invention relates to an additive manufacturing method for producing a silicone elastomer article, the method comprising the following steps: i) providing a photocrosslinkable silicone composition X and an irradiation source, said photocrosslinkable silicone composition X comprising: a) at least one organopolysiloxane A including at least one (meth)acrylate group, and b) at least one radical photoinitiator B as defined in the present invention; ii) selectively irradiating at least a portion of the photocrosslinkable silicone composition X by means of the irradiation source to form a portion of the silicone elastomer article; and iii) repeating step ii) enough times to produce the silicone elastomer article.

The invention relates to an additive manufacturing method for producing a silicone elastomer article, the method comprising the following steps: i) providing a photocrosslinkable silicone composition X and an irradiation source, said photocrosslinkable silicone composition X comprising: a) at least one organopolysiloxane A including at least one (meth)acrylate group, and b) at least one radical photoinitiator B as defined in the present invention; ii) selectively irradiating at least a portion of the photocrosslinkable silicone composition X by means of the irradiation source to form a portion of the silicone elastomer article; and iii) repeating step ii) enough times to produce the silicone elastomer article.