A system and method for forming a silicone composition C that is crosslinkable by exposure to radiation with a wavelength between 200 nm and 450 nm, having: at least one radical photoinitiator A; and at least one co-initiator B chosen from compounds having at least one hydrogen atom bonded to a silicon atom.

A system and method for forming a silicone composition C that is crosslinkable by exposure to radiation with a wavelength between 200 nm and 450 nm, having: at least one radical photoinitiator A; and at least one co-initiator B chosen from compounds having at least one hydrogen atom bonded to a silicon atom.

Provided herein is a method of making a clear or translucent object by additive manufacturing, comprising (a) providing a clear or translucent light polymerizable resin, the resin comprising: (i) light-polymerizable monomers, prepolymers, or a combination thereof; (ii) a photoinitiator; and (iii) a polysubstituted linear polyacene ultraviolet light absorbing compound which compound is polysubstituted with bromo, chloro, —Se—R′, —S—R′ or combinations thereof, where each R′ is independently selected from alkyl, aryl, and arylalkyl; and then (b) producing by stereolithography with ultraviolet light a clear or translucent object from said light polymerizable resin.

Provided herein is a method of making a clear or translucent object by additive manufacturing, comprising (a) providing a clear or translucent light polymerizable resin, the resin comprising: (i) light-polymerizable monomers, prepolymers, or a combination thereof; (ii) a photoinitiator; and (iii) a polysubstituted linear polyacene ultraviolet light absorbing compound which compound is polysubstituted with bromo, chloro, —Se—R′, —S—R′ or combinations thereof, where each R′ is independently selected from alkyl, aryl, and arylalkyl; and then (b) producing by stereolithography with ultraviolet light a clear or translucent object from said light polymerizable resin.

Provided is a resin composition including a compound represented by Formula (1), and a resin. R.sup.1 and R.sup.2 in Formula (1) each independently represent an alkyl group or the like, R.sup.3 and R.sup.6 each independently represent an alkoxy group or the like, R.sup.4 represents an alkyl group, an aryl group, an alkoxy group, or an aryloxy group, and R.sup.5 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, or an aryloxy group. Provided are a cured substance, an ultraviolet absorbing agent, an ultraviolet cut filter, a lens, a protective material, a compound, and a method of synthesizing a compound.

##STR00001##

Provided is a resin composition including a compound represented by Formula (1), and a resin. R.sup.1 and R.sup.2 in Formula (1) each independently represent an alkyl group or the like, R.sup.3 and R.sup.6 each independently represent an alkoxy group or the like, R.sup.4 represents an alkyl group, an aryl group, an alkoxy group, or an aryloxy group, and R.sup.5 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, or an aryloxy group. Provided are a cured substance, an ultraviolet absorbing agent, an ultraviolet cut filter, a lens, a protective material, a compound, and a method of synthesizing a compound.

##STR00001##

Provided is a resin composition including a compound represented by Formula (1), and a resin. R.sup.1 and R.sup.2 in Formula (1) each independently represent an alkyl group or the like, R.sup.3 and R.sup.6 each independently represent an alkoxy group or the like, R.sup.4 represents an alkyl group, an aryl group, an alkoxy group, or an aryloxy group, and R.sup.5 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, or an aryloxy group. Provided are a cured substance, an ultraviolet absorbing agent, an ultraviolet cut filter, a lens, a protective material, a compound, and a method of synthesizing a compound.

##STR00001##

Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices. Such devices exhibit a number of desirable properties, including providing wearers with favorable optical quality.

An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a polythiophene compound having two or more thiophene rings in the molecule.

An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a polythiophene compound having two or more thiophene rings in the molecule.