Abstract: Compositions comprising an impermeable acrylate-terminated oligomer, a reactive diluent, and 2-hydroxycyclohexylphenone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, or diethoxyacetophenone as a photoinitiator, are disclosed. These compositions have utility in optical coatings and electrical insulation.

Abstract: Compositions comprising an impermeable acrylate-terminated oligomer, at least one reactive diluent, and alpha-hydroxycyclohexylphenyl ketone, diethoxyacetophenone, 1-(4-dodecylphenyl)-2-hydroxy-2-methylpropan-1-one, or 2-hydroxy-2-methyl-1-phenylpropan-1-one as a photoinitiator, are disclosed. These compositions have utility in optical coatings.

Abstract: Lactone acrylates and organic anhydrides are condensed to form carboxyl-terminated lactone acrylates. These can be homopolymerized or copolymerized with ethylenically unsaturated monomers by means of radiation.

Abstract: Mercaptan substituted silicon compounds are produced by the reaction of amine with carboxyl. UV curable silicon compositions are produced from such compounds.

Abstract: Disclosed herein are (i) a resin composition comprising (A) a di-(meth)acrylic acid ester of a carbonate diol having an average molecular weight of 500 to 3000 or of an addition compound of the carbonate diol with an .epsilon.-caprolactone, (B) a monoethylenically unsaturated monomer and optionally, (C) an initiator of photopolymerization, (ii) a di-(meth)acrylic acid ester of an addition compound of a carbonate diol having an average molecular weight of 500 to 3000 with an .epsilon.-caprolactone and (iii) a di-(meth)acrylic acid ester represented by the formula: ##STR1## wherein R.sup.1 represents an alkylene group having 4 to 10 carbon atoms, R.sup.2 represents a hydrogen atom or a methyl group, the mean values of a and b are 0 to 5, respectively, the mean sum of a plus b is 0.5 to 5 and the mean value of l is 1 to 10.

Abstract: A process for forming on the surface of a substrate a layer of a siloxane polymer by exposing the substrate to a first vapor phase monomer precursor having the formula SiR.sub.x H.sub.4-x where x is 1 to 4 and R is alkyl or phenyl, and a second vapor phase oxygen-containing precursor in the presence of radiation of a predetermined wavelength to bring about the reaction to form the siloxane polymer which deposits on the surface of substrate. The monomer precursor may comprise a mixture, such as SiRH.sub.3 and SiR.sub.2 H.sub.2 with each other or with SiR.sub.3 H. By varying the composition of such mixtures, the composition of the siloxane polymer may be chosen to provide predetermined properties, and, further, may be varied throughout the thickness of the deposited layer.

Abstract: A photopolymerizable composition comprising a vinylic compound, a sulfur-containing compound and an .alpha.-diketone is disclosed. The sulfur-containing compound may be a mercaptobenzoic acid or a polysulfide.

Abstract: Photopolymerization initiators of the general formula: ##STR1## wherein R.sub.1 and R.sub.1 ' independently stand for a tertiary alkyl group or a tertiary aralkyl group and R.sub.2 and R.sub.2 ' independently stand for a hydrogen atom, a tertiary alkoxy group, or a tertiary aralkyloxy group are disclosed. They are useful for effecting polymerization of radically polymerizable unsaturated compounds. Tetra peroxy esters of benzophenone are preferred.

Abstract: A novel 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 compounds defined hereinafter, (c) at least one photo-polymerization initiator selected from benzoin alkyl ether base compounds defined hereinafter, (d) a reducing agent and (e) a filler.

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: As initiators for the photopolymerisation of ethylenically unsaturated compounds, the use of systems consisting of compounds of benzophenone type of formula I ##STR1## in which R, R' and R.sup.2 are preferably alkyls of 1-4 carbon atoms, R.sup.3 and R.sup.4 are preferably hydrogen and Ar is preferably phenyl, in combination with donors of hydrogen or substances which determine the formation of labile photochemical complexes, such as alcohols, ethers and tertiary amines with hydrogen in the alpha position, and the use for the same purpose of mixtures of 2,4,6-trialkylbenzophenones and benzophenone and particularly of a mixture of 2,4,6-trimethylbenzophenone and benzophenone in a molar ratio of 1.155, which has the advantage of being liquid at temperatures exceeding 10.degree. C. and of possessing photochemical activity superior to that of benzophenone.

Abstract: Positive acting electron beam resist materials are described. The material comprises a polymer having fundamental units of the general formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently represent hydrogen or a hydrocarbon group having from 1 to 6 carbon atoms, and R.sub.4 represents an organic residue having from 1 to 20 carbon atoms. The polymer may be used, as the resist material, as it is or by mixing with other type of resin.

Abstract: The present invention concerns a novel water-insoluble, hydrophilic, pressure-sensitive adhesive that has a number of unique characteristics including being elastomeric and ultraconformable. This adhesive includes an irradiation cross-linked synthetic organic polymer having a three-dimensional matrix, and an adhesive plasticizer. The plasticizer includes a substantially non-volatile elasticizer. The adhesive is useful either as a coating on a supporting web-like substrate or as a self-supporting layer. Also provided are various articles made using the adhesive such as a bandage or ostomy device, a method of making the adhesive, and methods of using the adhesive.In one embodiment, the adhesive is electroconductive, and is useful for attaching an electrically conductive member of an electrode to a selected surface such as mammalian tissue. Also provided is an electrode having a layer of this adhesive, and a method of adhering this electrode to mammalian tissue.

Abstract: Disclosed is a process for the preparation of a three dimensionally crosslinkable film-forming resin composition which process comprises irradiating an electron beam in an irradiation dose of from 0.1 to 40 Mrad onto a mixture of a film-forming resin with an alkoxysilane compound having a polymerizable unsaturated group for radical polymerization therebetween.

Abstract: A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is selected from 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; a polyperoxy ester containing a benzophenone group; and a combination the polyperoxy ester and an .alpha.-diketone.

Abstract: Adhesion promoters for metal substrates for paints cross-linkable with U.V. or E.B. radiations or with peroxides of general formula: ##STR1## (wherein R, m and n have the meaning which we will specify in the disclosure), obtained by means of the reaction of glycidyl acrylate and/or glycidyl methacrylate with dihydrophosphonoacetic acid.

Abstract: Mixtures which are curable by heating or irradiation with actinic light contain one or more cationically curable compounds, such as an epoxy, an olefinically unsaturated monomer, amino resin or phenolic resin, and as a cationically active curing catalyst one or more N-sulfonylamino-sulfonium salts of the formula ##STR1## such as N-p-toluenesulfonyl-N-methylaminodiphenylsulfonium hexafluorophosphate with or without quinones or peroxides are suitable, inter alia, for producing moldings, coatings, relief images and resist patterns.

Abstract: A water insoluble crosslinked poly .beta.-alanine is prepared by crosslinking poly .beta.-alanine with a crosslinking agent selected from the group consisting of formaldehyde and a dialdehyde or by irradiation of said poly .beta.-alanine with Co.sup.60.

Abstract: A storage-stabile, radiation-hardenable, NCO-free aqueous emulsions based on ionic urethane-urea acrylates is disclosed. The emulsions are made up of partially acrylated cycloaliphatic polyisocyanates which have been acrylated by a hydroxyalkyl acrylate (to the extent of 10-60 equivalent-% NCO). These products are then reacted with polyhydroxy compounds (to the extent of 20-75 equivalent-% NCO), and then with sodium salts of aminocarboxylic acids (to the extent of 5-15 equivalent-% NCO), and finally they are reacted with water and/or aliphatic diamines (said aliphatic diamines in amounts corresponding to 1-5 equivalent-% NCO).

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.