Abstract: The present invention provides a resist ink composition comprising a compound (a) having at least one oxetanyl group and at least one epoxy group within the same molecule and a compound (b) capable of initiating cationic polymerization under irradiation by an active energy ray and/or under heat. This resist ink composition has high photosensitivity and enables the final curing by a brief heating and the cured film exhibits good physical properties.

Abstract: The present invention provides a resist ink composition comprising a compound (a) having at least one oxetanyl group and at least one epoxy group within the same molecule and a compound (b) capable of initiating cationic polymerization under irradiation by an active energy ray and/or under heat. This resist ink composition has high photosensitivity and enables the final curing by a brief heating and the cured film exhibits good physical properties.

Abstract: The present invention provides a polymerizable composition comprising (a) an alicyclic alkane having at least one oxetanyl group and at least one epoxy group within the same molecule and (b) a compound capable of initiating cationic polymerization under irradiation of an active energy ray and/or under heat exhibits high activity in the photo- or heat-cationic ring-opening polymerization exhibiting high activity, e.g., rapid polymerizability, rapid curability, under irradiation of an active energy ray and/or under heat. The present invention also provides a polymerization product thereof.

Abstract: Photosensitive compositions prepared without use of a chromium compound. The compositions exhibit high resolution and satisfactory sensitivity, and do not cause environmental pollution. The photosensitive compositions contain a water-soluble azide compound which serves as a photocrosslinking agent and poly(N-vinylacetamide) that is photocrosslinkable in the presence of the water-soluble azide compound.

Abstract: Photosensitive compositions prepared without use of a chromium compound. The compositions exhibit high resolution and satisfactory sensitivity, and do not cause environmental pollution. The photosensitive compositions contain a water-soluble azide compound which serves as a photocrosslinking agent and poly(N-vinylacetamide) that is photocrosslinkable in the presence of the water-soluble azide compound.

Abstract: Photosensitive compositions prepared without use of a chromium compound. The compositions exhibit high resolution and satisfactory sensitivity, and do not cause environmental pollution. The photosensitive compositions contain a water-soluble azide compound which serves as a photocrosslinking agent and poly(N-vinylacetamide) that is photocrosslinkable in the presence of the water-soluble azide compound.

Abstract: Disclosed is a composition comprising a plant capable of growing in the presence of at least water and light, a nonionic water-absorptive polymer, and water, and a method of use of the composition as well as a method of fabricating a revegetation material.

Abstract: A high-flow concrete additive comprises a polymer of 10-100 wt % of an N-vinylacetamide, 0-50 wt % of a compound CH.sub.2 .dbd.CR.sup.3 X.sup.1 R.sup.4 SO.sub.3 X.sup.2 wherein R.sup.3 is hydrogen or methyl, R.sup.4 is alkylene of 1 to 4 carbon atoms, X.sup.1 is CONH or COO, and X.sup.2 is hydrogen, an alkali metal, ammonium salt or organic ammonium salt, and 0-40 wt % of a compound CH.sub.2 .dbd.CR.sup.5 X.sup.3 wherein R.sup.5 is hydrogen or methyl and X.sup.3 is CN, COOR.sup.6, CONH.sub.2, CONHR.sup.7, CONR.sup.8 R.sup.9, COR.sup.10, OCOR.sup.11 or OR.sup.12, in which R.sup.6 is hydrogen, an alkali metal, ammonium salt, organic ammonium salt or alkyl group of 1 to 4 carbon atoms, R.sup.7, R.sup.8 and R.sup.9 are alkyl groups of 1 to 4 carbon atoms, and R.sup.10, R.sup.11 and R.sup.12 are alkyl groups of 1 to 4 carbon atoms.

Abstract: A thermally reversible crosslinked resin composition comprising a specific ethylenic copolymer, a specific polyhydric alcohol and a specific reaction promoter and a molded article produced by utilizing the resin composition are disclosed. Because the resin composition and the molded article have a high reaction rate of dissociation of the crosslinking during heating and a high reaction rate of formation of the crosslinking during cooling, they can be utilized for various applications, such as melt molding and the like, as the the thermally reversible crosslinked resin composition and the thermally reversible crosslinked molded article which are substantially valuable for commercial application.

Abstract: A method of producing a curable composition containing a prepolymer having a polythioether skeleton, characterized by comprising addition reacting (A) 4,4'-bis(methacryloylthio)-diphenylsulfide having the formula (I): ##STR1## wherein R is a polyvalent organic group composed of an aliphatic or aromatic hydrocarbon and n represents an integer of 2 or more, with the functional group equivalent ratio of the mercapto groups of the component (B) (ii) to the methacryloyl groups of the component (A) being from 0.02 to 1.01, in another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I) in the presence of a base catalyst.

Abstract: 4,4'-Bis(methacryloylthio)diphenylsulfide having the formula (I): ##STR1## and a curable composition characterized by comprising: (A) 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I):(B) (i) another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I), and (ii) a polythiol represented by the formula (II):R-(SH).sub.n (II)wherein R is a polyvalent organic group and n represents an integer of 2 or more, wherein the content of the component (B)(i), when the component (B)(i) is present, in the total amount of said components (A), (B)(i) and (B)(ii) is 10 to 90% by weight, and the functional group equivalent ratio of the mercapto groups of the component (B)(ii), when the component (B)(ii) is present, to the methacryloyl groups of the component (A) is from 0.02 to 1.

Abstract: Polymerizable compositions capable of giving transparent resin having a high refractive index of at least 1.57 which are useful as optical materials and glass adhesives are disclosed. The compositions comprise a mono(meth)acrylate having a biphenyl skeleton and a di(meth)acrylate having a biphenyl skeleton or a bisphenol skeleton. The compositions cure rapidly, particularly under irradiation of ultraviolet light.