Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric paper, fiber and plastics are made from copolymers of p-acetoxystyrene and another monomer which is an alkadiene or an allyl ester of a polymerizable ethylenically unsaturated acid blended with ethylenically unsaturated compounds.

Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric, paper, fiber and plastics are made from copolymers of dialkyl muconates and p-acetoxystyrene blended with ethylenically unsaturated compounds.

Abstract: Improved contact lens materials are obtained from copolymers containing a siloxanyl alkyl ester vinyl monomer by exposing the materials to high energy radiation thereby reducing the amount of unreacted monomer and residual contaminants.

Abstract: A photopolymerizable composition comprising a vinyl monomer, a mercaptocarboxylic acid/.alpha.-diketone photopolymerization initiator and a storage stabilizer. The composition may admit of a filler, and exhibits excellent mechanical strength, storage stability, color and resistance to coloring, and availability.

Abstract: A light curable dental liquid or paste comprises an ethylenic unsaturated monomer, a light polymerization initiator and an organic filler. The light polymerization initiator is a combination of an organic peroxide and a pyrylium salt compound of: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represents a hydrogen atom, an alkyl group and the like, X stands for an oxygen or sulfur atom and Y for an anionic functional group.

Abstract: Radiation-setting (meth)acrylate-functional polyesters prepared from base polyesters which are fluid at room temperature and have molecular weights of 1,000 or more as well as aliphatic side chains bound to the main chain by ester bridges and, in some cases, ether bridges, and in which a maximum of 90% of the original hydroxyl groups of the base polyester are functionalized, are usable for coatings and especially as adhesives free of solvents.

Abstract: Pressure-sensitive adhesives composed of radiation-cured (meth)acrylic-functional polyesters are prepared from base polyesters, fluid at room temperature, which have molecular weights of 1,000 to 10,000 and branched main chain, and/or from new polyesters having aliphatic side chains bound by ester bridges or, in some cases, ether bridges to the main chain, followed by functionalization of a maximum of 90% of the original hydroxyl groups of the base polyesters by reaction with (meth)acrylate compounds, and crosslinked by electron beam or ultraviolet radiation in a thin coating on a support. The new pressure-sensitive adhesives have the property and the advantage of being cross-linkable by radiation without the use of solvents or diluents.

Abstract: A pressure sensitive adhesive film reducible in the adhesive force by the application thereto of ultraviolet light which comprises:(a) a base film permeable to ultraviolet light; and(b) a layer of a pressure sensitive adhesive formed on one side of the base film, the adhesive comprising:(i) at least one elastic polymer selected from the group consisting of a polymer mainly composed of an acrylic acid ester copolymer and a saturated copolyester mainly composed of dibasic carboxylic acids and dihydroxy alcohols;(ii) an ultraviolet light polymerizable acrylic acid ester having not less than two acryloyl or methacryloyl groups in the molecule and having a molecular weight of not more than about 1000, in amounts of about 15-200 parts by weight in relation to 100 parts by weight of the elastic polymer; and(iii) a photopolymerization initiator in amounts sufficent to induce the photopolymerization of the ultraviolet light polymerizable acrylic acid ester;The film is especially suitable for use as a dicing film in di

Abstract: This invention is directed to photocopolymerizable compositions comprising an epoxide containing two or more epoxy groups, a poly (active hydrogen) organic compound having at least some primary hydroxyl content and a photoinitiator. The cured coating compositions exhibit fast cure rates, good water resistance and can have utility as automotive finishes, can finishes, appliance finishes, general metal finishes, printing inks, adhesives and the like.

Abstract: Disclosed are photocurable compositions which comprise(A) a compound having at least one epoxy group and at least one photocurable unsaturated ethylenic double bond within the same molecule;(B) an organometallic compound and(C) a silicon compound capable of generating silanol group by irradiation of light, or comprise(A) a compound having at least one epoxy group and at least one photocurable unsaturated ethylenic double bond within the same molecule;(E) an epoxy compound;(F) an organic phosphorus compound; and(G) a photosensitizer.The compositions of the present invention have excellent film characteristics such as good adhesion property, light resistance, heat resistance and weathering resistance.

Abstract: Biocompatible, shelf-stable, polymerizable compositions which are especially useful for applications requiring direct contact with living pulpal tissue, bone or dentin, and methods for using the compositions are disclosed. The compositions are non-toxic, both before and after in situ polymerization, and include at least one polymerizable monomer or prepolymer which polymerized by a mechanism other than chelation or saponification. In one aspect, the compositions comprise at least one non-toxic polymerizable ethylenically unsaturated monomer or prepolymer and a catalytically effective amount of a free radical initiator system, and preferably, from about 5 to about 70% by weight of calcium hydroxide or calcium oxide.

Abstract: Described herein are compositions suitable for photocopolymerization comprising (a) an epoxide containing two or more epoxy groups, and (b) a hydroxyl substituted cycloaliphatic monoepoxide. The composition may additionally contain a poly (active hydrogen) organic compound and/or a photoinitiator. A coating produced from such a composition has a good combination of properties.

Abstract: An ultraviolet-curing resin composition comprising an acrylic oligomer, tris(2-hydroxyethyl)isocyanurate triacrylate, a reactive diluent and a photopolymerization initiator, wherein the acrylic oligomer is a urethane obtained from diphenylmethane diisocyanate, a polytetramethylene glycol having a molecular weight of 650 to 1,300 and a monoacrylate having a hydroxy group, the amount of tris(2-hydroxyethyl)isocyanurate triacrylate is 1 to 100 parts by weight for 100 parts by weight of the urethane acrylate, and the reactive diluent is an acrylic monomer. A mixture of tris(2-hydroxyethyl)isocyanurate triacrylate and a terminal diacrylate having a cycloacetal group may be used in place of tris(2-hydroxyethyl)isocyanurate triacrylate. The compositions are useful as secondary cladding materials and buffer materials in optical fiber units.

Abstract: This invention is directed to photocopolymerizable compositions comprising a poly (active hydrogen) organic compound, a photoinitiator and, as a reactive diluent, a substituted cycloaliphatic monoepoxide. The photocopolymerizable compositions have low viscosity and can be applied to suitable substrates by conventional methods and, after curing, provide excellent pressure sensitive and heat-activated adhesive coatings.

Abstract: The invention discloses an optical disc base plate obtained by curing with irradiation of light a light- or radiation-curable resin composition in which a photopolymerization initiator is contained in an amount of 0.5 to 5 parts by weight per 100 parts by weight of a resin composition comprising the compounds (1), (2) and (3) mixed in amounts falling in the area defined by lines A-B-C-D-E-A in the triangular diagram of FIG.

Abstract: Acrylate-based pressure-sensitive adhesives are produced by a process in which a liquid, polymerizable monomer composition containing at least one acrylate monomer is placed in a closed reaction vessel, deaerated and the monomer(s) are polymerized by exposure to ionizing radiation such as gamma irradiation. The process allows for the direct production of low-solvent or solventless acrylate-based adhesives suitable for application by hot-melt techniques.

Abstract: An ultraviolet curing liquid coating composition which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a coating adapted for the coating of optical glass fiber. This coating composition comprises as the essential component, an acrylate-terminated polyurethane oligomer based on a polyfunctional core which is at least trifunctional and which supports one branch for each functionality in the core. Each of the branches leads to an acrylate-functional terminal group, with there being from about 150 to about 2500 units of molecular weight in each branch between the trifunctional core and the acrylate-functional terminal group. Depending primarily upon the molecular weight of the branches, one can provide coating compositions for buffer coat, single coat or topcoat use.

Abstract: A light curing composition for dental restoration comprises (a) a polymerizable compound containing at least one ethylenically unsaturated double-bond, (b) at least one photo-polymerization initiator selected from ketal base compound as defined herein, (c) at least one photo-polymerization initiator selected from anthraquinone base compounds as defined herein, (d) a reducing agent and (e) a filler.

Abstract: Radiation-curing oligomers and liquid coating compositions based thereon are disclosed which cure with ultraviolet light in the presence of a photoinitiator. The coating compositions can provide either a single coating for optical glass fiber which resists microbending difficulties down to around -40.degree. C., or a topcoat for overcoating softer buffer coatings which resist microbending down to around -60.degree. C.

Abstract: Propiophenones of the formula I ##STR1## in which R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, --Si(CH.sub.3).sub.3, allyl or benzyl, R.sup.2 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.4 -alkyl which is substituted by C.sub.1 -C.sub.4 -alkoxy or --OH, --(CH.sub.2 --CH.sub.2 --O).sub.n --R.sup.5 where n is 2 to 20 and R.sup.5 is H or C.sub.1 -C.sub.4 -alkyl, --Si(CH.sub.3).sub.3, benzyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkynyl or 2-tetrahydrofuranyl, or R.sup.1 and R.sup.2 together are a C.sub.1 -C.sub.6 -alkylidene radical or a C.sub.2 -C.sub.6 -alkylidene radical which is substituted by hydroxyl, C.sub.1 -C.sub.4 -alkoxy or phenyl, a linear or branched C.sub.2 -C.sub.6 -alkanediyl radical, a benzylidene, cyclopentylidene or cyclohexylidene radical or a 2,2,2-trichloroethylidene, 2-furylimethylidene or dimethylsilylidene radical, R.sup.3 is phenyl which is unsubstituted or substituted by one or more --Cl, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.