The invention provides a delamination-resistant embedded silicone hydrogel contact lens having an insert that is embedded in a silicone hydrogel bulk material. The insert is made of a crosslinked polymeric material having a refractive index higher than that of the silicone hydrogel bulk material by at least 0.07 and comprises a diffractive structure disposed on one of the front and back curve surfaces of the insert for providing a diffractive power that contributes to the overall optical power of the contact lens.

A silicon-containing composition includes a polysiloxane compound and solvent. The polysiloxane compound includes a fluorine atom and a group including an ester bond. The polysiloxane compound preferably includes a first structural unit represented by formula (1), and a second structural unit represented by formula (2). X represents a monovalent organic group having 1 to 20 carbon atoms and comprising a fluorine atom; R.sup.1 represents a halogen atom, a hydroxy group, or a monovalent organic group having 1 to 20 carbon atoms; Y represents a monovalent organic group having 1 to 20 carbon atoms and comprising an ester bond; and R.sup.2 represents a halogen atom, a hydroxy group, or a monovalent organic group having 1 to 20 carbon atoms.

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A hardcoat film includes a substrate; a hardcoat layer; and an anti-scratch layer, where the hardcoat layer includes a cured product of polyorganosilsesquioxane, the polyorganosilsesquioxane has a siloxane constitutional unit containing a (meth)acryloyl group and a siloxane constitutional unit containing an epoxy group and is represented by the General Formula (1), a film thickness of the anti-scratch layer is 0.05 to 5 μm, and the anti-scratch layer includes a cured product of a compound having two or more (meth)acryloyl groups in one molecule, where Ra represents a group containing a (meth)acryloyl group; Rb represents a group containing an epoxy group; Rc represents a monovalent substituent; p, q, and r represent a proportion of Ra, Rb, and Rc in the General Formula (1) respectively; p+q+r is 100; p and q are greater than 0; r is equal to or greater than 0; p/q is 0.01 to 99.

Compositions for treating a substrate to provide increased lubricity to portions of the substrate surface that come into contact with the surface of a mating component are provided. The treated substrates provide improved lubricity, while maintaining adhesion between the surface of the substrate and an overlying polymer coating and imparting corrosion resistance to the substrate surface. The compositions include a silanol coupling agent in combination with lubricating particles, and an acid, which are dissolved or dispersed in a mixture of organic solvent and water.

A composition containing: (a) a polysiloxane resin, wherein the polysiloxane resin contains the following siloxane units: [R3SiO.sub.1/2], [(OZ).sub.qSiO.sub.(4-q)/2] and at least one of [(OZ).sub.tR.sup.EPSiO.sub.(3-t)/2] and [(OZ).sub.dRR.sup.EPSiO.sub.(2-d)/2]; where: each R is independently in each occurrence selected from hydrocarbyls, R.sup.EP is an epoxy functional hydrocarbyl group, subscript q is in each occurrence a number selected from a range of 0-3, subscript t is in each occurrence a number selected from a range of 0-2, and subscript d is in each occurrence a number selected from a range of 0-1 provided that the average concentration of OZ groups is at least 15 mole-percent relative to moles of silicon atoms in the polysiloxane resin; (b) a photo acid generator; (c) a moisture cure catalyst; and (d) optionally, an epoxy functional diluent.

Provided are a photocurable fluoropolyether-based elastomer composition having both a favorable preservation stability and fast curability, being bondable at a low temperature in a short period of time, and generating no air bubbles in the resin at the time of curing; and a bonding method thereof. The photocurable fluoropolyether-based elastomer composition contains: (A) a linear polyfluoro compound; (B) a fluorine-containing organohydrogenpolysiloxane; (C) a photoactive hydrosilylation reaction catalyst; and (D) a zeolite having an average primary particle size of not larger than 30 μm.

Provided are a photocurable fluoropolyether-based elastomer composition having both a favorable preservation stability and fast curability, being bondable at a low temperature in a short period of time, and generating no air bubbles in the resin at the time of curing; and a bonding method thereof. The photocurable fluoropolyether-based elastomer composition contains: (A) a linear polyfluoro compound; (B) a fluorine-containing organohydrogenpolysiloxane; (C) a photoactive hydrosilylation reaction catalyst; and (D) a zeolite having an average primary particle size of not larger than 30 μm.

The present invention provides a hard-coat-layer-forming composition whereby a hard coat layer having excellent scratch resistance and cracking resistance can be formed, and an optical member. The hard-coat-layer-forming composition is a composition used to form a hard coat layer on a plastic substrate, and includes: metal oxide particles; at least one type of component X selected from the group consisting of an organic silicon compound represented by a predetermined formula, a hydrolysate thereof, and a hydrolytic condensate thereof; and at least one type of component Y selected from the group consisting of an organic silicon compound represented by a predetermined formula, a hydrolysate thereof, and a hydrolytic condensate thereof, and a glycoluril crosslinking agent, a hydrolysate thereof, and a hydrolytic condensate thereof.

The present invention provides a hard-coat-layer-forming composition whereby a hard coat layer having excellent scratch resistance and cracking resistance can be formed, and an optical member. The hard-coat-layer-forming composition is a composition used to form a hard coat layer on a plastic substrate, and includes: metal oxide particles; at least one type of component X selected from the group consisting of an organic silicon compound represented by a predetermined formula, a hydrolysate thereof, and a hydrolytic condensate thereof; and at least one type of component Y selected from the group consisting of an organic silicon compound represented by a predetermined formula, a hydrolysate thereof, and a hydrolytic condensate thereof, and a glycoluril crosslinking agent, a hydrolysate thereof, and a hydrolytic condensate thereof.

Through the present invention, by undergoing a step in which a straight-chain diorganopolysiloxane having silanol groups at both terminal ends of the molecular chain thereof, a hydrolyzable silane and/or a partial hydrolysis condensate thereof having a hydrolyzable group capable of detaching a lactic acid ester, and an amino-group-containing hydrolyzable organosilane and/or a partial hydrolysis condensate thereof are pre-mixed/reacted in advance and silanol groups at both terminal ends of the molecular chain of a main agent (base polymer) are blocked by specific hydrolyzable silyl groups, it is possible to manufacture a lactic-acid-ester-type room-temperature-curable organopolysiloxane composition excellent in all characteristics including curability, adhesive properties, workability, and the like that were not attainable by the conventional lactic-acid-ester-type room-temperature curable (RTV) silicone rubber composition.