Abstract: A dental adhesive comprising a (meth)acryloylaminoalkyl carboxylate of the formula ##STR1## in which R.sup.1 represents hydrogen or methyl;R.sup.2 represents methylene or ethylene; andR.sup.3 represents hydrogen, methyl, or ethyl;and at least one of an initiator, a non-toxic solvent, and a filler. The dental adhesive is useful to effect a strong adhesive bonding of dental materials to collagen-containing materials.

Abstract: Highly fluorinated alkyl group substituted acetophenones and benzophenones suitable for use as initiators for the polymerization of ethylenically-unsaturated monomers in which conventional initiators have limited solubility. These compounds are particularly suitable for use for the polymerization of highly fluorinated ethylenically-unsaturated monomers.

Abstract: A silicone composition comprising:(a) a first silane of the formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently selected from hydrogen, halo, and organo radicals; andn is an integer having a value of from 1 to 4;(b) a second silane of the formula: ##STR2## wherein: R.sub.11 and R.sub.16 are non-polymerizable groups and are independently selected from halo and organo radicals;R.sub.12, R.sub.13, R.sub.14, and R.sub.

Abstract: An acryloxy-functional capped silicone formed as a reaction product of:(i) a silyl diacrylate compound of the formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently selected from hydrogen, halo, and organo radicals; andn is an integer having a value of from 1 to 4; and(ii) a silicone having at least one functionality which is reactive with an acryloxy functionality of the silyl diacrylate compound to yield the acryloxy-functional capped silicone.The capped silicone may suitably be formulated with an effective amount of a photoinitiator for curing of the acryloxy-functional capped silicone under photoinitiating curing conditions. The silicone functionality which is reactive with the acryloxy functionality of the silyl diacrylate compound may be --OH, or other labile hydrogen-containing substituent. Preferably, the silicone is a hydroxy-terminated linear polydiorganosiloxane.

Abstract: A resin composition, particularly for an ink printing composition, comprising a polyurethane (meth-) acrylate resin, N-vinylpyrrolidone, and acryloylmorphline, with a photoinitiator when used as an ultraviolet raycurable ink printing composition, and without a photoinitiator when used as an electron beam-curable ink printing composition.

Abstract: An ultraviolet-hardenable adhesive for bonding a non-water swellable, ophthalmic-lens to a support member, in producing a non-water swellable ophthalmic lens, the adhesive containing at least one photopolymerizing monomer, and at least one photoinitiator, the at least one photopolymerizing monomer being selected from the group consisting of acrylates or methacrylates represented by following general formulas (I) and (II): ##STR1## wherein R.sub.1 is hydrogen or methyl,R.sub.2 is hydrogen or methyl,R.sub.3 is hydrogen or methyl,m is a positive integer from 2 to 20, andn is a positive integer from 1 to 5.A method of bonding a lens blank to a support member with an adhesive, and a processing of manufacturing a lens using an adhesive, are also disclosed.

Abstract: An adhesive composition comprising 10 to 60 parts by weight per 100 parts of the total weight of components (1) to (4) of a monofunctional (meth)acrylic monomer, 0.01 to 10 parts by weight per 100 parts of the total weight of components (1) to (4) of a compound having at least two (meth)acryloyl groups in a molecule, 30 to 80 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a heat resistant epoxy resin, 0.1 to 20 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of an imidazole compound, 0.001 to 10 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a photopolymerization initiator, and 0.01 to 20 parts by weight per 100 parts by weight of the total weight of components (1) to (4) of a thixotropic agent, with which an electronic part can be effectively packaged to a printed board.

Abstract: The present invention relates to coating compositions containing multifunctional acrylate monomers, acrylic monomers and colloidal silica. Silanes are absent from these coating compositions. Transparent, abrasion resistant coatings result from the cure, either by ultraviolet light or electron beam radiation, of these compositions.

Abstract: Radiation-reactive mixtures suitable for producing insulating layers and printed circuits are composed of certain precursors for preparing polyimides, polyisoindoloquinazolinediones, polyoxiazinediones, polyquinazolinediones or polyquinazolones and aryl-containing carbonyl compounds which when excited by UV radiation are capable of hydrogen abstraction, these mixtures undergoing solubility differentiation on irradiation with actinic light.

Abstract: Compounds of the general formula I ##STR1## wherein Z is CR.sup.1 R.sup.2 (OR.sup.3) or phenyl,R.sup.1 being H, C.sub.1-6 -alkyl or phenyl,R.sup.2 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy andR.sup.3 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkanoyl andZ' is Y-[(CH.sub.2).sub.m -X].sub.n -,X being CH.sub.2 or 0,Y being OH; COOH or SO.sub.3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C.sub.1-20 -alkyl or C.sub.1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, andn and m each being the numbers 1-4, are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.

Abstract: A two package UV curable conformal coating has been developed which possesses low moisture permeability and good electrical properties and provides a cure for shadowing of components on a printed wiring board. The conformal coating is a mixture of Component (A) which is a mixture of (1) from about 40 to 80% by weight, of a urethane having a free isocyanate group; (2) from about 20 to 60%, by weight, of reactive acrylate diluents; (3) from 0 to about 10% by weight of UV photoinitiators; and (4) from 0 to about 10% by weight of additives; and component (B) which is a mixture of (1) about 50 to 80% by weight of an acrylate-epoxy resin; (2) about 1 to 10% by weight of an acrylate-urethane oligomer; (3) about 10 to 94% by weight of reactive acrylate monomers; (4) from 0 to about 10%, by weight, of UV photoinitiators; and (5) from 0 to about 10% by weight of additives; with the proviso that the total weight percentage of said photoinitiators and additives not be less than 1 percent and not exceed about 10 percent.

Abstract: The present invention relates to a positive working photosensitive composition having an improved sensitivity due to the use of a sensitizer and having an excellent incandescent light safety. This composition comprises at least 1 molar % of a structural unit derived from at least one of monomers having the following general formulae: ##STR1## wherein: R.sub.1 represents a hydrogen atom, an alkyl group or a substituted alkyl group,R.sub.2 represents a divalent alkylene group or a substituted divalent alkylene group,R.sub.3, R.sub.4 and R.sub.5 may be the same as or different from each other and each represents an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group,R.sub.6 and R.sub.7 may be the same as or different from each other and each represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group,Ar.sub.1 represents a single bond or Ar.sub.2, andAr.sub.

Abstract: A conjugated diene copolymer comprising (A) 10 to 60 mole % of a conjugated diene compound unit, (B) 5 to 50 mole % of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid unit, (C) 0.1 to 20 mole % of a polyfunctional alkenyl compound unit, (D) 0 to 10 mole % of a diene compound unit having cyclic carbon-carbon double bonds and (E) 0 to 80 mole % of a monoolefinically unsaturated compound unit, the sum of the amounts of units (A), (B), (C), (D) and (E) being 100 mole %, said copolymer having an intrinsic viscosity [.eta.] of 0.01 to 3.0 dl/g as measured at 30.degree. C. in dimethylformamide. The copolymer is soluble in aqueous alkali solutions, excels in processability and photosetting property, and has excellent rubber elasticity and transparency even after photosetting.

Abstract: A curable organopolysiloxane composition having condensation-curing properties and ultraviolet-curing properties, comprising (A) a diorganopolysiloxane having a viscosity of 50 to 200,000 cSt, both ends of each molecule thereof being blocked with a silanol group, (B) a silane compound, (C) an (alkyl)acrylic acid derivative, (D) a catalyst for condensation and (E) a sensitizer.

Abstract: A composition curable to a solid crosslinked polyorganosiloxane comprises:(a) an acrylic functional silicone prepolymer having a plurality of acrylic groups of the formula: ##STR1## bound to silicon atoms thereof, where R is H or methyl, and R.sup.1 is a divalent olefinically unsaturated hydrocarbon group,(b) a silicone prepolymer having a plurality of organothiol groups thereon, and(c) an effective amount of a thiol-ene cure catalyst.Particularly preferred formulations are photoinitiated formulations employing alkylthiol functional silicones in which the total number of thiol groups is between 0.5 and 1.5 times the total number of ene groups counting both the acrylic and the linking group R.sup.1 as ene groups.

Abstract: A water-based photopolymerizable resin composition is disclosed which is suitable for the preparation of a relief printing plate by the photolithographic techniques. The inventive composition, which basically comprises a water-soluble polymer, e.g., poly(vinyl alcohol), a photopolymerizable monomer and a photopolymerization initiator, is characterized in that at least a part of the photopolymerizable monomer is N-tetrahydrofurfuryloxymethyl acrylamide or N-tetrahydrofurfuryloxymethyl methacrylamide. By virtue of this unique ingredient in the composition, the printing plate prepared from the inventive composition is imparted with improved fidelity of pattern reproduction and durability in printing as a consequence of increased hardness and pliability to be freed from the drawback of crack formation in printing even on a cylinder of small diameter under a cold and low-humidity condition.

Abstract: A conjugated diene copolymer comprising (A) 40 to 90 mole % of a conjugated diene component, (B) 0.5 to 10 mole % of an alpha,beta-ethylenically unsaturated carboxylic acid component, (C) 0.1 to 5 mole % of a polyfunctional alkenyl compound component and (D) 5 to 58 mole % of a monoolefinically unsaturated compound component wherein the intrinsic viscosity [.eta.] of the copolymer as measured at 30.degree. C. in dimethylformamide is 0.01 to 3.0 dl/g, the width (.DELTA.Tg) of the endothermic transition temperature section determined by a differential scanning calorimetry is 45.degree. to 120.degree. C. and the limit temperature (T.sub.1) on the lower temperature side of the endothermic transition temperature section is -40.degree. C. or less.

Abstract: A photocured acrylic coating comprised of the photoreaction products of:(i) at least one photocurable polyfunctional acrylate monomer;(ii) at least one acetophenone photoinitiator; and(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylate, and hydroxybenzophenones. The coating is substantially or completely cured and provides improved protection to the substrate against ultraviolet radiation.

Abstract: Compounds of the general formula I ##STR1## wherein Z is CR.sup.1 R.sup.2 (OR.sup.3) or phenyl,R.sup.1 being H, C.sub.1-6 -alkyl or phenyl,R.sup.2 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy andR.sup.3 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkanoyl andZ' is Y--[(CH.sub.2).sub.m --X].sub.n --,X being CH.sub.2 or 0,Y being OH; COOH or SO.sub.3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C.sub.1-20 -alkyl or C.sub.1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, andn and m each being the numbers 1-4,are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.

Abstract: Acryl functional silicone compounds are made by reacting an amine functional silicon compound with a di- or multi-functional acryl compound by a Michael-type addition reaction. These acryl functional silicone compounds are purer than others because no catalyst is used and no by-products are formed. These acryl functional silicone compounds can be used as adhesion promoters and as coating compositions which can be cured by ultraviolet radiation.

Abstract: Promoters for a crosslinking reaction involved in the curing of a system comprising crosslinkable polymers are bound to polymeric microparticles having a diameter of about 0.01 to 6 microns prepared by polymerizing a mixture of ethylenically unsaturated monomers. The microparticles carrying the crosslinking reaction promoter may be incorporated to coating compositions, printing inks, sealants, adhesives and other polymeric products in place of conventional crosslinking reaction promoters.

Abstract: A linear polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, an aryl group, or a halogen atom and the ethynyl group is in either meta position or para position to the main polymer chain;and a weight-average molecular weight of 1,000 to 1,000,000. A resin composition consisting essentially of (i) a polymer having a recurring unit represented by the formula (I) or a polymer having a recurring unit represented by the formula (I) and a recurring unit represented by the formula (II): ##STR2## wherein X and Y each independently is a C.sub.6-20 aryl group, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, a silyl group having a C.sub.1-10 alkyl group or a C.sub.

Abstract: The curable organopolysiloxane composition of the invention is formulated with two kinds of crosslinking agents including an organosilane compound having 2 or 3 isopropenyloxy groups in a molecule and an organopolysiloxane having at least 2 mercapto groups in a molecule added to the base ingredient of a hydroxy-terminated diorganopolysiloxane together with a curing catalyst and a photosensitizer. The composition has two-way curability by the condensation reaction in the presence of atmospheric moisture between the silanolic hydroxy groups and the isopropenyloxy groups and by the ultraviolet-induced addition reaction between the isopropenyloxy groups and the mercapto groups to exhibit very reliable curing behavior giving a cured rubbery elastomer having excellent properties.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, chlorine, phenyl, dialkylamino of 2-4 carbon atoms or alkyl or alkoxy each of up to 18 carbon atoms; R.sub.2 is hydrogen, chlorine, bromine or alkyl or alkoxy each of up to 4 carbon atoms; R.sub.3 and R.sub.4, which can be the same or different, each is hydrogen or alkyl of up to 6 carbon atoms; R.sub.5 is hydrogen or alkyl or alkanoyl each of up to 4 carbon atoms; and R.sub.6 is hydrogen or methyl, with the proviso that not all of R.sub.1 to R.sub.6 simultaneously are hydrogen, are effective photosensitizers, especially for photopolymerization of unsaturated compounds and for hardening of printing dyes.

Abstract: A method of curing a liquid silicone composition to a crosslinked polymer on a substrate having shadow areas no readily accessible to direct UV light, the method comprising:(a) applying a liquid composition to the substrate in a manner so as to cover both the light accessible and the shadow areas, the composition comprising a radical photoinitiator and a crosslinkable polydihydrocarbylsiloxane prepolymer having a molecular weight of at least 1000, having a plurality of acrylate or methacrylate groups bound thereto and further including a plurality of groups of the formula ##STR1## where R.sup.1 is a hydrolyzable organic group and R.sup.2 is R.sup.1 or, if R.sup.1 is dialkylamino, R.sup.2 is R.sup.1 or hydrocarbyl;(b) irradiation the substrate with UV irradiation sufficient to substantially cure the composition in the areas directly accessible to UV light, and(c) exposing the composition on the substrate to moisture for sufficient time to cure the composition in the shadow areas.

Abstract: Compositions of (a) a silicone resin characterized by an intermediate region free of acrylic groups, at least 150 siloxane units long, and terminal acrylic groups; (b) at least 10% of a fumed silica filler; and (c) a photoinitiator, can be cured by UV irradiation to tough elastomeric materials useful in adhesive and sealant applications.

Abstract: A photo-curable adhesive composition for glass lamination, which comprises:(A) 100 parts by weight of a (meth)acrylate monomer represented by the formula: ##STR1## where R.sub.1 is a hydrogen atom or a CH.sub.3 -- group, each of R.sub.2, R.sub.3 and R.sub.4 is a straight-chained or branched alkylene group, each of n.sub.1 and n.sub.4 is an integer of at least 1 and each of n.sub.2 and n.sub.3 is an integer of 0 or at least 1, and having a molecular weight of from about 116 to about 5,000;(B) from 0.1 to 5 parts by weight of a photosensitizer;(C) from 0 to 5 parts by weight of a silane coupling agent; and(D) from 0 to 100 parts by weight of a plasticizer.

Abstract: There is disclosed a resin composition comprising(A) a spiro ortho ester compound and/or a spiro ortho carbonate compound;(B) an aluminum compound; and(C) a silanol compound or a silicon compound which is capable of generating a silanol group;the amounts of components (B) and (C) being within the range of 0.001 to 10% by weight and 0.1 to 20% by weiht, based on the amount of component (A), respectively.The resin composition of this invention is excellent in volumetric shrinkage performance at curing operation and is good in storability. Therefore, the cured product can be used for a wide variety of industrially valuable applications, such as an ink, a coating, an adhesive, a surface coating, an encapsulation and an electrical insulating material.