Abstract: A multilayer sheet includes a first resin layer, a second resin layer, a particle-containing layer disposed at least between the first and second resin layers and including plural particles and gaps formed between the particles, and an intermediate layer disposed at least one selected from between the first resin layer and the particle-containing layer or between the second resin layer and the particle-containing layer, including a copolymer having a weight average molecular weight (Mw) of 300,000 or more and a molecular weight distribution, expressed as a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn), of 6.0 or less and a structural moiety derived from a crosslinking agent adapted to crosslink the copolymer, and having a crosslinking density of from more than 0 mol/m3 to 450 mol/m3.

Abstract: A multilayer sheet includes a first resin layer, a second resin layer, a particle-containing layer disposed at least between the first and second resin layers and including plural particles and gaps formed between the particles, and an intermediate layer disposed at least one selected from between the first resin layer and the particle-containing layer or between the second resin layer and the particle-containing layer, including a copolymer having a weight average molecular weight (Mw) of 300,000 or more and a molecular weight distribution, expressed as a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn), of 6.0 or less and a structural moiety derived from a crosslinking agent adapted to crosslink the copolymer, and having a crosslinking density of from more than 0 mol/m3 to 450 mol/m3.

Abstract: The optical composite sheet 1 includes a first optical layer 10 and a second optical layer 20, and a low-refractive index layer 30 that is laminated at least between the first optical layer 10 and the second optical layer 20 and has a lower refractive index than the refractive indices of the first optical layer 10 and the second optical layer 20. The low-refractive index layer 30 is characterized by containing many particles 50 having an average particle size of 5 nm to 300 nm, a binder resin 35 that binds the surface sites of the particles 50 to each other, and gaps 36 that are formed among the particles.

Abstract: A pigment composition obtainable by dry-milling an organic pigment in the presence of a resin for a printing ink, the resin being composed of a synthetic resin for a printing ink in an amount of 10 to 80 parts by weight per 100 parts by weight of the organic pigment and an aliphatic hydrocarbon resin which is extracted from gilsonite and has a softening point of 120 to 125° C. in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the organic pigment.

Abstract: A process for the production of a pigment composition comprising dry-milling an organic pigment in the presence of a resin, which process aims to improve dispersibility and dispersing stabilization and is capable of giving a pigment composition for a printing ink excellent in fluidity, wherein the resin comprises a resin for a printing ink and an ?-olefin-ethylenic unsaturated group-containing dicarboxylic acid copolymer or its modified product and 10 to 50 parts by weight of the resin for a printing ink and 1 to 30 parts by weight of the ?-olefin-ethylenic unsaturated group-containing dicarboxylic acid copolymer or its modified product are used per 100 parts by weight of the organic pigment, and a printing ink containing a pigment composition obtained according to the above process as a colorant.

Abstract: A pigment composition obtainable by dry-milling an organic pigment in the presence of a resin for a printing ink, the resin being composed of a synthetic resin for a printing ink in an amount of 10 to 80 parts by weight per 100 parts by weight of the organic pigment and an aliphatic hydrocarbon resin which is extracted from gilsonite and has a softening point of 120 to 125° C. in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the organic pigment.

Abstract: A reactive microgel suitable for a photosensitive resin composition for a water-developable flexographic printing plate, which has an average particle diameter to 10 .mu.m, and is formed ofmicrogel particles, as a core, synthesized from an acrylic monomer in an aqueous medium in the presence of an oil-soluble initiator and in the presence of a reactive polymer emulsifier which is an adduct of a neutralized product of an acrylic copolymer having a tertiary amino group with a compound having an epoxy group and an .alpha., .beta.-unsaturated double bond, and a nonionic emulsifier having an HLB of 12 to 16, anda compound having an epoxy group and an .alpha., .beta.-unsaturated double bond, attached to surfaces of the microgel particles.

Abstract: A reactive microgel suitable for a photosensitive resin composition for a water-developable flexographic printing plate, which has an average particle diameter of 1 to 10 .mu.m, and is formed ofmicrogel particles, as a core, synthesized from an acrylic monomer in an aqueous medium in the presence of an oil-soluble initiator and in the presence of a reactive polymer emulsifier which is an adduct of a neutralized product of an acrylic copolymer having a tertiary amino group with a compound having an epoxy group and an .alpha.,.beta.-unsaturated double bond, and a nonionic emulsifier having an HLB of 12 to 16, anda compound having an epoxy group and an .alpha.,.beta.-unsaturated double bond, attached to surfaces of the microgel particles.