Abstract: A curable composition includes a condensation product having a weight average molecular weight of 30,000 or less and a curing agent, the condensation product being obtained by hydrolysis and condensation of a first and second silane compound in the presence of a neutral salt catalyst. The condensation product also has a ratio Y/X of 0.2 or less, wherein X is the number of moles of an OR3 group directly bonded to silicon atoms of the first and second silane compounds, and Y is the number of moles of an OR3 group directly bonded to a silicon atom of the condensation product. The first silane compound is represented by R1—(SiR2a(OR3)3-a), and the second silane compound is represented by R4—(SiR2a(OR3)3-a).

Abstract: An active energy ray-curable composition includes (A) a condensate having a weight average molecular weight of 20,000 or less, and (B) a photoacid generator, with the condensate (A) being obtained by hydrolysis/condensation of: (I) a silane compound containing a hydrolyzable silyl group represented by formula (I): R1—(SiR2a(OR3)3-a. A ratio (Y/X) of Y to X is 0.2 or less, where X represents the number of moles of OR3 groups directly bonded to silicon atoms in the silane compound (I) which is a starting material of the condensate (A) and Y represents the number of moles of OR3 groups directly bonded to silicon atoms in the condensate (A).

Abstract: An active energy ray-curable resin composition includes 100 parts by weight of (A) a polymer whose main chain is a (meth)acrylic copolymer and which has, at an end of the main chain and/or at a side chain, at least one group having a silicon atom bonded to a hydrolyzable group represented by a formula (I): —SiR2a(OR1)3-a (I), where R1 represents a hydrogen atom or a C1-C10 alkyl group, R2 represents a hydrogen atom or a monovalent hydrocarbon group selected from a C1-C10 alkyl group, a C6-C25 aryl group, and a C7-C12 aralkyl group, and a represents an integer of 0 to 2. The composition further includes 0.1 to 20 parts by weight of (B1) a secondary and/or tertiary amino group-containing silane compound, and 0.05 to 20 parts by weight of (C) a photoacid generator.

Abstract: A curable composition includes a condensation product having a weight average molecular weight of 30,000 or less and a curing agent, the condensation product being obtained by hydrolysis and condensation of a first and secondsilane compound in the presence of a neutral salt catalyst. The condensation product also has a ratio Y/X of 0.2 or less, wherein X is the number of moles of an OR3 group directly bonded to silicon atoms of the first and second silane compounds, and Y is the number of moles of an OR3 group directly bonded to a silicon atom of the condensation product. The first silane compound is represented by R1—(SiR2a(OR3)3-a), and the second silane compound is represented by R4—(SiR2a(OR3)3-a).

Abstract: An active energy ray curable composition includes a copolymer and a photo-acid generator, the copolymer being obtained by reacting a cocondensate with a polymerizable unsaturated monomer, wherein the cocondensate is obtained by hydrolyzing and condensing a first silane compound having a hydrolyzable silyl group and a second silane compound having a hydrolyzable silyl group, the cocondensate has 0.1 to 3.0 polymerizable unsaturated groups per molecule, the first silane compound is represented by the general formula (I): R1—(SiR2a(OR3)3-a), and the second silane compound is represented by the general formula (II): R4—(SiR2a(OR3)3-a)).

Abstract: An active energy ray-curable resin composition includes 100 parts by weight of (A) a polymer whose main chain is a (meth)acrylic copolymer and which has, at an end of the main chain and/or at a side chain, at least one group having a silicon atom bonded to a hydrolyzable group represented by a formula (I): —SiR2a(OR1)3-a (I), where R1 represents a hydrogen atom or a C1-C10 alkyl group, R2 represents a hydrogen atom or a monovalent hydrocarbon group selected from a C1-C10 alkyl group, a C6-C25 aryl group, and a C7-C12 aralkyl group, and a represents an integer of 0 to 2. The composition further includes 0.1 to 20 parts by weight of (B1) a secondary and/or tertiary amino group-containing silane compound, and 0.05 to 20 parts by weight of (C) a photoacid generator.

Abstract: An active energy ray-curable composition includes (A) a condensate having a weight average molecular weight of 20,000 or less, and (B) a photoacid generator, with the condensate (A) being obtained by hydrolysis/condensation of: (I) a silane compound containing a hydrolyzable silyl group represented by formula (I): R1—(SiR2a(OR3)3-a); and (II) a silane compound containing a hydrolyzable silyl group represented by formula (II): R4—Si(OR3)3 at a molar ratio of the silane compound (II) to the silane compound (I) of 2.0 or less under basic conditions. A ratio (Y/X) of Y to X is 0.2 or less, where X represents the number of moles of OR3 groups directly bonded to silicon atoms in the silane compound (I) and the silane compound (II) which are starting materials of the condensate (A) and Y represents the number of moles of OR3 groups directly bonded to silicon atoms in the condensate (A).