The present invention relates to a surface treatment agent for soft contact lens, containing a reaction product obtained through a reaction between the following poly(meth)acrylic acid and the following copolymer (P): Poly(meth)acrylic acid: a poly(meth)acrylic acid having an average molecular weight of 1,000 to 2,000,000, and Copolymer (P): a copolymer obtained through polymerization of a specified hydrophilic monomer (n.sub.A) and a specified reactive monomer (n.sub.B), wherein in the copolymer, the hydrophilic monomer (n.sub.A) is 80 to 99 mol %, the reactive monomer (n.sub.B) is 1 to 20 mol %, and a weight average molecular weight is 10,000 to 5,000,000.

In accordance with the present invention, it is possible to provide a surface treatment agent for soft contact lens capable of tremendously enhancing surface hydrophilicity of a soft contact lens to improve discomfort.

The present invention relates to a surface treatment agent for soft contact lens, containing a reaction product obtained through a reaction between the following poly(meth)acrylic acid and the following copolymer (P): Poly(meth)acrylic acid: a poly(meth)acrylic acid having an average molecular weight of 1,000 to 2,000,000, and Copolymer (P): a copolymer obtained through polymerization of a specified hydrophilic monomer (n.sub.A) and a specified reactive monomer (n.sub.B), wherein in the copolymer, the hydrophilic monomer (n.sub.A) is 80 to 99 mol %, the reactive monomer (n.sub.B) is 1 to 20 mol %, and a weight average molecular weight is 10,000 to 5,000,000.

In accordance with the present invention, it is possible to provide a surface treatment agent for soft contact lens capable of tremendously enhancing surface hydrophilicity of a soft contact lens to improve discomfort.

An ink composition contains a carbon black and/or an organic pigment, water, a polysaccharide, two or more of diols, and particles of an acrylic resin. The two or more of diols include a first diol having from 5 to 7 carbon atoms and a second diol having from 1 to 4 carbon atoms, and a content of the first diol in the ink composition is 0.05 wt % or more.

An ink composition contains a carbon black and/or an organic pigment, water, a polysaccharide, two or more of diols, and particles of an acrylic resin. The two or more of diols include a first diol having from 5 to 7 carbon atoms and a second diol having from 1 to 4 carbon atoms, and a content of the first diol in the ink composition is 0.05 wt % or more.

A protective, sacrificial, water-reversible, coating composition for the protection of substrates comprised of water, a volatile base, a film-forming acrylic polymer in a water dispersion form, a compatabilizing polymer, specifically poly (2-ethyl-2-oxazoline), a poly acidic polymer (pH specific in terms of its solubility), wherein said coating is both water applied and water reversible or re-soluble under specific pH conditions.

A protective, sacrificial, water-reversible, coating composition for the protection of substrates comprised of water, a volatile base, a film-forming acrylic polymer in a water dispersion form, a compatabilizing polymer, specifically poly (2-ethyl-2-oxazoline), a poly acidic polymer (pH specific in terms of its solubility), wherein said coating is both water applied and water reversible or re-soluble under specific pH conditions.

A protective, sacrificial, water-reversible, coating composition for the protection of substrates comprised of water, a volatile base, a film-forming acrylic polymer in a water dispersion form, a compatabilizing polymer, specifically poly (2-ethyl-2-oxazoline), a poly acidic polymer (pH specific in terms of its solubility), wherein said coating is both water applied and water reversible or re-soluble under specific pH conditions.

An anti-glare film is disclosed. The anti-glare film comprises a transparent substrate and an anti-glare layer comprising an acrylic binder resin, a polyether-modified siloxane and a plurality of silica nanoparticles, wherein the silica nanoparticles are flocculated into a micro-floccule with an average secondary particle diameter of 1,500 nm to 3,100 nm. The present anti-glare film can provide a reliable anti-glare property with low haze and fine surface.

An anti-glare film is disclosed. The anti-glare film comprises a transparent substrate and an anti-glare layer comprising an acrylic binder resin, a polyether-modified siloxane and a plurality of silica nanoparticles, wherein the silica nanoparticles are flocculated into a micro-floccule with an average secondary particle diameter of 1,500 nm to 3,100 nm. The present anti-glare film can provide a reliable anti-glare property with low haze and fine surface.

The present invention concerns a suspension of a polymer comprising, in addition to said polymer, a) a liquid medium; b) a monovalent cation salt; c) an alginate.