The hydrogel includes a first network structure and a second network structure. The second network structure is entwined with the first network structure. The first network structure contains a polymer crosslinked with a first crosslinking agent. The second network structure contains a polymer crosslinked with a second crosslinking agent. 50 mol % or more of the first crosslinking agent does not contain a decomposable bond. 50 mol % or more of the second crosslinking agent does not contain a decomposable bond.

A conductive composition comprising a conductive polymer (A), a water-soluble polymer (B), and a solvent (C1), wherein: the water-soluble polymer (B) comprises a water-soluble polymer (B11) represented by formula (11), and an amount of a water-soluble polymer (B2) represented by formula (2) as the water-soluble polymer (B) is 0.15% by mass or less, based on a total mass of the conductive composition: ##STR00001##
wherein R.sup.1 denotes a linear or branched alkyl group with 6 to 20 carbon atoms, each of R.sup.4 and R.sup.5 independently denotes a methyl or ethyl group, R.sup.6 denotes a hydrophilic group, R.sup.7 denotes a hydrogen atom or a methyl group, Y.sup.1 denotes a single bond, —S—, —S(═O)—, —C(═O)—O— or —O—, Z denotes a cyano group or a hydroxy group, each of p1 and q denotes an average number of repetitions, and is a number of from 1 to 50, and m denotes a number of from 1 to 5.

A conductive composition comprising a conductive polymer (A), a water-soluble polymer (B), and a solvent (C1), wherein: the water-soluble polymer (B) comprises a water-soluble polymer (B11) represented by formula (11), and an amount of a water-soluble polymer (B2) represented by formula (2) as the water-soluble polymer (B) is 0.15% by mass or less, based on a total mass of the conductive composition: ##STR00001##
wherein R.sup.1 denotes a linear or branched alkyl group with 6 to 20 carbon atoms, each of R.sup.4 and R.sup.5 independently denotes a methyl or ethyl group, R.sup.6 denotes a hydrophilic group, R.sup.7 denotes a hydrogen atom or a methyl group, Y.sup.1 denotes a single bond, —S—, —S(═O)—, —C(═O)—O— or —O—, Z denotes a cyano group or a hydroxy group, each of p1 and q denotes an average number of repetitions, and is a number of from 1 to 50, and m denotes a number of from 1 to 5.

The invention provide a method for producing coated silicone hydrogel contact lenses in a cost-effective and environmentally friendly manner. The method is free of lens extraction step and comprises: curing thermally or actinically in a lens mold a polymerizable composition that comprises at least one hydrophilized polysiloxane vinylic crosslinker, hydroxyethyl methacrylate, C.sub.1-C.sub.2 alkoxyethyl (meth)acrylate, at least one free-radical initiator, and at least one solvent selected from the group consisting of water, propylene glycol, and/or a low-molecular weight polyethyleneglycol; and heating the cast-molded silicone hydrogel contact lens in an aqueous coating solution to form a coated silicone hydrogel contact lens comprising a bulk silicone hydrogel material and a layer of a crosslinked hydrophilic polymeric material that is covalently attached onto the bulk silicone hydrogel material. Resultant contact lenses are optically clear and wettable and have a relatively high oxygen permeability.

The invention provide a method for producing coated silicone hydrogel contact lenses in a cost-effective and environmentally friendly manner. The method is free of lens extraction step and comprises: curing thermally or actinically in a lens mold a polymerizable composition that comprises at least one hydrophilized polysiloxane vinylic crosslinker, hydroxyethyl methacrylate, C.sub.1-C.sub.2 alkoxyethyl (meth)acrylate, at least one free-radical initiator, and at least one solvent selected from the group consisting of water, propylene glycol, and/or a low-molecular weight polyethyleneglycol; and heating the cast-molded silicone hydrogel contact lens in an aqueous coating solution to form a coated silicone hydrogel contact lens comprising a bulk silicone hydrogel material and a layer of a crosslinked hydrophilic polymeric material that is covalently attached onto the bulk silicone hydrogel material. Resultant contact lenses are optically clear and wettable and have a relatively high oxygen permeability.

The present disclosure relates to water-absorbent resin particles in which a contact angle of 0.9% by mass saline at 25° C.±2° C. is 100 degrees or larger, and an absorbent material containing the water-absorbent resin particles.

Disclosed are a superabsorbent polymer having improved anti-caking properties and a method of preparing the same, and the superabsorbent polymer having improved anti-caking properties includes a superabsorbent polymer, microparticles, and water, and to improve anti-caking properties of the superabsorbent polymer, the temperature of the superabsorbent polymer or water upon addition of water or the aging time upon stirring is adjusted, thereby preventing caking of the particles.

A WS12-releasing contact lens is described as well as method of manufacturing the same. The WS12-releasing contact lens comprises a polymeric lens body and WS12 releasably adhered to the polymeric lens body, and releases from 0.05 μg to 0.5 μg WS12 after 1 hour in a release media or when worn by a human subject. The WS12-releasing contact lens can be comfortably worn by a symptomatic contact lens wearer and can increase the duration of comfortable lens wearing time and/or reduce lens awareness events and/or reduce contact lens dryness in a symptomatic contact lens wearer.

A WS12-releasing contact lens is described as well as method of manufacturing the same. The WS12-releasing contact lens comprises a polymeric lens body and WS12 releasably adhered to the polymeric lens body, and releases from 0.05 μg to 0.5 μg WS12 after 1 hour in a release media or when worn by a human subject. The WS12-releasing contact lens can be comfortably worn by a symptomatic contact lens wearer and can increase the duration of comfortable lens wearing time and/or reduce lens awareness events and/or reduce contact lens dryness in a symptomatic contact lens wearer.

Described herein is a method for producing a contact lens comprising a central photochromic zone that has a diameter of about 13 mm or less and is concentric with the central axis of the contact lens. The method comprises: applying, in the center of the molding surface of a male mold half, a drop (having a volume of about 5 μL or less) of a first polymerizable fluid composition containing at least one photochromic compound and a relatively-high molecular weight polysiloxane vinylic crosslinker for increasing the viscosity and adhesion on the molding surface of the male mold half; dosing a second polymerizable fluid composition in a female mold hald; closing the female mold hald with the male mold half with the drop thereon to form a molding assembly; and curing the second polymerizable fluid composition and the drop of the first polymerizable fluid composition in the molding assembly.