The present disclosure provides heat-curable coating compositions for optical articles. The coating compositions include a multifunctional epoxy monomer in combination with a UV absorber. The inclusion of at least one multifunctional epoxy monomer and at least one UV absorber provide epoxy coatings that exhibit excellent adhesion on a variety of lens substrates.

The present disclosure provides heat-curable coating compositions for optical articles. The coating compositions include a multifunctional epoxy monomer in combination with a UV absorber. The inclusion of at least one multifunctional epoxy monomer and at least one UV absorber provide epoxy coatings that exhibit excellent adhesion on a variety of lens substrates.

This invention relates to a thermally conductive potting composition, comprising a first part comprising at least one epoxy resin; at least one thermally conductive filler; and at least one metal complex; and a second part comprising at least one curing agent. The first part of the thermally conductive potting composition exhibits high thixotropic index and therefore the first part is easily stored. After the first part and the second part is mixed, the thermally conductive potting composition exhibits low thixotropic index and the meets the requirement for potting process.

A cationic curable composition that generates a silanol group by light irradiation and is cured by heat, the cationic curable composition including: a cationic curable component; porous particles holding an aluminum chelate; and a photodegradable silicon compound that generates a silanol group by photodegradation.

A cationic curable composition that generates a silanol group by light irradiation and is cured by heat, the cationic curable composition including: a cationic curable component; porous particles holding an aluminum chelate; and a photodegradable silicon compound that generates a silanol group by photodegradation.

Provided is a cationic curing agent including porous particles and a mixture carried on the porous particles. The mixture includes a compound represented by Formula (1) below in which R.sup.1 to R.sup.3 are identical and R.sup.1 to R.sup.6 are identical and a compound represented by Formula (1) below in which at least one of R.sup.1 to R.sup.6 is different.

##STR00001##

In Formula (1), R.sup.1 to R.sup.3 are each an optionally branched alkyl group having from 1 to 18 carbon atoms, or a phenyl group that may have a substituent, and R.sup.4 to R.sup.6 are each a hydrogen atom, an optionally branched alkyl group having from 1 to 4 carbon atoms, a halogenoalkyl group, an alkoxy group, or a phenoxy group that may have a substituent.

Provided is a cationic curing agent including porous particles and a mixture carried on the porous particles. The mixture includes a compound represented by Formula (1) below in which R.sup.1 to R.sup.3 are identical and R.sup.1 to R.sup.6 are identical and a compound represented by Formula (1) below in which at least one of R.sup.1 to R.sup.6 is different.

##STR00001##

In Formula (1), R.sup.1 to R.sup.3 are each an optionally branched alkyl group having from 1 to 18 carbon atoms, or a phenyl group that may have a substituent, and R.sup.4 to R.sup.6 are each a hydrogen atom, an optionally branched alkyl group having from 1 to 4 carbon atoms, a halogenoalkyl group, an alkoxy group, or a phenoxy group that may have a substituent.

Provided is a latent curing agent, including: porous particles supporting an aluminum chelate compound; and a coating film over surfaces of the porous particles, the coating film containing an aluminum chelate compound and a polymer that contains at least one of a urea bond and an urethane bond, wherein a content of an active aluminum chelate compound is 20% by mass or greater.

Provided is a latent curing agent, including: porous particles supporting an aluminum chelate compound; and a coating film over surfaces of the porous particles, the coating film containing an aluminum chelate compound and a polymer that contains at least one of a urea bond and an urethane bond, wherein a content of an active aluminum chelate compound is 20% by mass or greater.

Provided is a latent curing agent, including: porous particles supporting an aluminum chelate compound; and a coating film over surfaces of the porous particles, the coating film containing an aluminum chelate compound and a polymer that contains at least one of a urea bond and an urethane bond, wherein a content of an active aluminum chelate compound is 20% by mass or greater.