Abstract: A photosensitive resin composition for forming a laser engravable printing element, comprising: (a) 100 parts by weight of a resin which is in a solid state at 20° C., wherein the resin has a number average molecular weight of from 5,000 to 300,000, (b) 5 to 200 parts by weight of an organic compound having a number average molecular weight of less than 5,000 and having at least one polymerizable unsaturated group per molecule, and (c) 1 to 100 parts by weight of an inorganic porous material having an average pore diameter of from 1 to 1,000 nm, a pore volume of from 0.1 to 10 ml/g and a number average particle diameter of not more than 10 ?m. A laser engravable printing element formed from the above-mentioned resin composition. A method for producing a laser engraved printing element by using the above-mentioned photosensitive resin composition.

Abstract: A hollow cylindrical printing element, comprising a hollow cylindrical core material (A) and a resin layer (B) or a resin layer (C). The hollow cylindrical core material (A) further comprises a photosensitive resin hardened layer (1) of 0.05 to 50 mm in thickness having a fiber-like, cloth-like, or film-like reinforcement material and the shore hardness D of 30 to 100°. The resin layer (B) is laminated on the hollow cylindrical core material (A), has a thickness of 0.1 to 100 mm, and allows a pattern to be formed on the surface thereof. The resin layer (C) has a pattern formed on the surface thereof.

Abstract: Disclosed is a photosensitive resin composition for forming a laser engravable printing element, comprising: (a) 100 parts by weight of a resin which is a plastomer at 20° C., wherein the resin has a number average molecular weight (Mn) of from 1,000 to 100,000 and has a polymerizable unsaturated group in an amount such that the average number of the polymerizable unsaturated group per molecule is at least 0.7, (b) 5 to 200 parts by weight, relative to 100 parts by weight of resin (a), of an organic compound having an Mn of less than 1,000 and having at least one polymerizable unsaturated group per molecule, and (c) 1 to 100 parts by weight, relative to 100 parts by weight of resin (a), of an inorganic porous material. Also disclosed is a laser engravable printing element formed from the above-mentioned resin composition.

Abstract: Disclosed is a photosensitive resin composition for forming a laser engravable printing element, comprising: (a) 100 parts by weight of a resin which is a plastomer at 20° C., wherein the resin has a number average molecular weight (Mn) of from 1,000 to 100,000 and has a polymerizable unsaturated group in an amount such that the average number of the polymerizable unsaturated group per molecule is at least 0.7, (b) 5 to 200 parts by weight, relative to 100 parts by weight of resin (a), of an organic compound having an Mn of less than 1,000 and having at least one polymerizable unsaturated group per molecule, and (c) 1 to 100 parts by weight, relative to 100 parts by weight of resin (a), of an inorganic porous material. Also disclosed is a laser engravable printing element formed from the above-mentioned resin composition.

Abstract: The vinylidene chloride-based latex of the invention has a chlorine ion content reduced to or below 500 ppm based on the total concentration of all solid matter in the latex by weight, preferably by dialysis, and has excellent resistance to hot water treatment.

Abstract: A process for preparing adipic acid from cyclohexene oxide comprising the following steps (a) and (b):(a) hydrating cyclohexene oxide to obtain 1,2-dihydroxycyclohexane and an oligomers represented by formula (I): ##STR1## wherein n represents a number of from 1 to 5 in number average, and (b) oxidizing the 1,2-dihydroxycyclohexane and the oligomers represented by formula (I) in a nitric acid aqueous solution.

Abstract: A novel copolycarbonate is provided, which comprises recurring units respectively of the formulae: ##STR1## in a molar ratio of units (A) to units (B) of from 9:1 to 1:9. The copolycarbonate has a number average molecular weight of from 300 to 50,000. The copolycarbonate is useful as a reactive polymer for producing final polymers such as a polyurethane and a thermoplastic elastomer. The copolycarbonate as well as various final polymers produced therefrom have excellent resistance to hydrolysis, light, chlorine, oxidative degradation, heat, etc. The polyurethane and the thermoplastic elastomer containing units of the novel copolycarbonate as soft segements exhibit remarkably improved flexibility and elastic recovery as compared to those of the conventional polymers.

Abstract: A novel copolycarbonate is provided, which comprises recurring units respectively of the formulae: ##STR1## in a molar ratio of units (A) to units (B) of from 9:1 to 1:9. The copolycarbonate has a number average molecular weight of from 300 to 50,000. The copolycarbonate is useful as a reactive polymer for producing final polymers such as a polyurethane and a thermoplastic elastomer. The copolycarbonate as well as various final polymers produced therefrom have excellent resistance to hydrolysis, light, chlorine, oxidative degradation, heat, etc. The polyurethane and the thermoplastic elastomer containing units of the novel copolycarbonate as soft segments exhibit remarkably improved flexibility and elastic recovery as compared to those of the conventional polymers.

Abstract: By flowing a gaseous stream containing methanol and a phenol through a fluidized bed of particles of a highly attrition resistant catalyst comprising 10 to 80% by weight of silica and 90 to 20% by weight of a metal oxide supported on the silica and have been calcined at 500.degree. to 900.degree. C., the ortho position of the phenol is methylated with high selectivity, whereby various useful ortho-methylated phenol derivatives can be advantageously obtained.