The present invention aims to provide an adhesive composition that can exhibit excellent adhesion to both smooth surfaces and rough surfaces. The present invention also aims to provide an adhesive tape including an adhesive layer containing the adhesive composition, as well as a method for fixing and a method for producing an electronic device component or an in-vehicle component using the adhesive tape. Provided is an adhesive composition containing an acrylic copolymer containing a structural unit derived from n-heptyl (meth)acrylate.

The present invention aims to provide an adhesive composition that can exhibit excellent adhesion to both smooth surfaces and rough surfaces. The present invention also aims to provide an adhesive tape including an adhesive layer containing the adhesive composition, as well as a method for fixing and a method for producing an electronic device component or an in-vehicle component using the adhesive tape. Provided is an adhesive composition containing an acrylic copolymer containing a structural unit derived from n-heptyl (meth)acrylate.

The present invention provides a material for intraocular lens which has improved hydrolysis resistance. The material for intraocular lens according to the present invention is obtained by polymerizing a monomer composition comprising: a base monomer, a hydrophilic monomer, and a cross-likable monomer, wherein the base monomer comprises an aromatic ring-containing acrylate monomer and an alkoxyalkyl methacrylate monomer having an alkoxyalkyl group having four or less carbon atoms. A blending ratio on a molar basis of the methacrylate monomer with respect to the acrylate monomer in all the monomer components contained in the monomer composition is 0.25 to 1.00.

A photocurable resin composition which can improve adhesion between light transmitting members. The photocurable resin composition contains a monofunctional acrylic monomer having a heating residue of 85.0% or less after being heated at 60° C. for 30 minutes, a crosslinking agent, a photopolymerization initiator, and a softening agent composed of at least one of plasticizer and tackifier, and the heating residue after being heated at 60° C. for 30 minutes is less than 96.0%.

A photocurable resin composition which can improve adhesion between light transmitting members. The photocurable resin composition contains a monofunctional acrylic monomer having a heating residue of 85.0% or less after being heated at 60° C. for 30 minutes, a crosslinking agent, a photopolymerization initiator, and a softening agent composed of at least one of plasticizer and tackifier, and the heating residue after being heated at 60° C. for 30 minutes is less than 96.0%.

The present invention is a method for producing a powder dispersant composition for hydraulic compositions including, drying a mixture containing a copolymer having constituent unit (1) represented by the following formula (1) and constituent unit (2) represented by the following formula (2) and water to produce a powder containing the copolymer, wherein: when the copolymer is a copolymer whose n in constituent unit (2) is less than 40, the mixture is dried by a thin film drying method or a spray drying method with a pH of 11 or more and 14 or less; when the copolymer is a copolymer whose n in constituent unit (2) is 40 or more and less than 80, the mixture is dried by a thin film drying method or a spray drying method with a pH of 9 or more and 14 or less; and when the copolymer is a copolymer whose n in constituent unit (2) is 80 or more, the mixture is dried by a thin film drying method or a spray drying method with a pH of 7 or more and 14 or less,

##STR00001## wherein R.sup.1 and R.sup.3 are the same or different and individually represent a hydrogen atom or a methyl group; R.sup.2 and R.sup.4 are the same or different and individually represent a hydrogen atom or an alkyl group with 1 or more and 3 or less carbons; M represents a hydrogen atom, an alkali metal, an alkaline-earth metal, ammonium or an organic ammonium; p represents a number of 0 or more and 2 or less; q represents a number of 0 or 1; and n represents an average number of added moles and a number of 5 or more and 150 or less.

The present invention is a method for producing a powder dispersant composition for hydraulic compositions including, drying a mixture containing a copolymer having constituent unit (1) represented by the following formula (1) and constituent unit (2) represented by the following formula (2) and water to produce a powder containing the copolymer, wherein: when the copolymer is a copolymer whose n in constituent unit (2) is less than 40, the mixture is dried by a thin film drying method or a spray drying method with a pH of 11 or more and 14 or less; when the copolymer is a copolymer whose n in constituent unit (2) is 40 or more and less than 80, the mixture is dried by a thin film drying method or a spray drying method with a pH of 9 or more and 14 or less; and when the copolymer is a copolymer whose n in constituent unit (2) is 80 or more, the mixture is dried by a thin film drying method or a spray drying method with a pH of 7 or more and 14 or less,

##STR00001## wherein R.sup.1 and R.sup.3 are the same or different and individually represent a hydrogen atom or a methyl group; R.sup.2 and R.sup.4 are the same or different and individually represent a hydrogen atom or an alkyl group with 1 or more and 3 or less carbons; M represents a hydrogen atom, an alkali metal, an alkaline-earth metal, ammonium or an organic ammonium; p represents a number of 0 or more and 2 or less; q represents a number of 0 or 1; and n represents an average number of added moles and a number of 5 or more and 150 or less.

The invention relates to poly(oligo(ethylene glycol) methacrylate) microgels, to the process for preparing same and the uses thereof in various fields of application such as optics, electronics, pharmacy and cosmetics.

These microgels have the advantage of being monodisperse, pH-responsive and temperature-responsive. They can carry magnetic nanoparticles or biologically active molecules. These microgels may also form transparent films, which have novel optical and electromechanical properties.

The invention relates to poly(oligo(ethylene glycol) methacrylate) microgels, to the process for preparing same and the uses thereof in various fields of application such as optics, electronics, pharmacy and cosmetics.

These microgels have the advantage of being monodisperse, pH-responsive and temperature-responsive. They can carry magnetic nanoparticles or biologically active molecules. These microgels may also form transparent films, which have novel optical and electromechanical properties.

A resist composition comprising a base polymer and an acid generator containing a sulfonium salt having the formula (1) or an iodonium salt having the formula (2). ##STR00001##