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: Disclosed is a new urethane polyacrylate having at least one terminal isocyanato acrylic pendent radical. Preferably the molecular chain within the acrylate caps has been extended with a polyhydroxy compound just before final end capping with isocyanato acrylic. The isocyanato acrylic is preferably isocyanato ethyl methacrylate and the urethane is diisocyanate capped polyether and the polyether radical is oxyalkylene. The method for producing the urethane polyacrylate involves end capping a polyol with diisocyanate yielding a reaction product with two reactive equivalents of isocyanate and then capping less than all of the isocyanate with a hydroxyacrylate, after which the remaining isocyanate is reacted with polyol to provide chain extension. The chain extending polyol is then capped with a isocyanato acrylic.

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: 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: 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: A composition including a mixture of UV curable urethane acrylate and a urethane diacrylate compounds provides an aqueous alkaline developable, flexible solder mask having excellent electrical insulation resistance under hydrolytic testing conditions at elevated temperatures.

Abstract: Liquid coating compositions adapted to be cured by exposure to ionizing radiation are disclosed in which a liquid vehicle of coating viscosity having an ethylenically unsaturated portion comprising one or more polyethylenically unsaturated materials adapted to cure on radiation exposure, pigment dispersed in the vehicle, and an acrylate-functional radiation-curable dispersant having free carboxyl group for wetting the pigment and assisting in the stable dispersion of the pigment in the vehicle. This dispersant is an acrylate-functional carboxylic acid amide carrying free carboxyl groups, especially an adduct of a polyacrylate and a stoichiometric deficiency of a primary amine to provide a secondary amine having acrylate functionality, the secondary amine functionality being reacted with a polycarboxylic acid anhydride to form amide groups therewith.

Abstract: A composition including a mixture of UV curable urethane acrylate and a urethane diacrylate compounds provides an aqueous alkaline developable, flexible solder mask having excellent electrical insulation resistance under hydrolytic testing conditions at elevated temperatures.

Abstract: A postformable ultraviolet curable primer coating composition is disclosed which consists essentially of: (A) from 10% to 80% of a linear acrylate-terminated polyurethane based on a polycarbonate diol; (B) from 2% to 35%, of acrylic acid; (C) from 15% to 65% of a monoethylenically unsaturated monomer having the rapid ultraviolet cure rate associated with acrylate monomers and having a glass transition temperature above 35.degree. C.,; (D) from 0% to 25% of a polyacrylate monomer; and (E) photoinitiator rendering the composition curable with ultraviolet light.

Abstract: Linear fluorooligomers having at least two reactive end groups per polymer molecule are incorporated into radiation sensitive polymer systems which have improved continuous temperature resistance and low dielectric constant. The polymer systems can be applied as lacquers. Preferably perfluorated poly-ethers and perfluorated alkanes are used as starting compounds. The polymeric product is usable as a coating for the production of printed multi-layer wirings and economises on through-bores and additional copper intermeidate layers. A further field of application exists in the field of integrated semiconductor ciruits in VLSI-technology for the production of negative photo-resists.

Abstract: A UV-ray curable resin composition comprising a polyurethane derived from a polyether polyol and a diene polymer having hydroxyl group, said polyurethane having polymerizable double bond different from the carbon-carbon double bonds contained in said diene polymer having hydroxyl group, and a coated optical fiber having a coated layer comprising the cured product of said resin composition. This composition has good coating characteristics, and the cured product thereof has small modulus over a wide temperature range and good hydrolysis resistance, and water absorption resistance. The coated optical fiber has small transmission loss over a wide temperature range and has high strength even in water.

Abstract: Radiation curable composition suitable for use as an adhesive for bonding glass, especially for the production of clear glass laminates, and comprising a urethane acrylate component in an .alpha..beta.-ethylenically unsaturated diluent which comprises (i) acrylic acid, (ii) a monoester of acrylic acid and a C.sub.1-6 alkanol or substituted derivative thereof said monoester being present in an amount of up to 400% by weight of component (i), and optionally (iii) up to 40% by weight of multiacrylate.

Abstract: An aqueous alkaline developable UV curable urethane acrylate compound and composition are used for making flexible solder mask coatings, characterized by rapid development in an aqueous, alkaline medium, and advantageous performance properties.

Abstract: An essentially isocyanate-free polyurethane polyurea polyethylenic oligomer is disclosed which is unusually strong and elastic. This oligomer is the reaction product of: (1) organic diisocyanate; (2) a stoichiometric deficiency of difunctional materials reactive therewith and consisting essentially of: (A) diol component selected from polycarbonate diol and polyoxyalkylene glycol, this diol component having a molecular weight of from 200 to 2000; (B) dihydric bisphenol-based alkylene oxide adduct containing from 2-10 alkylene groups per molecule; and (C) a diprimary diamine component selected from alkylene diamine and polyoxyalkylene diamine, this diamine component having a molecular weight of from about 70 to 800. Components (A) and (B) are present in a weight ratio of from 1:4 to 9:1 and component (C) is present to supply from 30 to 60 equivalent percent of the total equivalents of component (2).

Abstract: Radiation cross-linkable binding agents formed by reacting first an epoxy component with more than one epoxy group per molecule with at least one carboxylic acid in a molar ratio 1 of epoxy group per 0.5 to 0.9 carboxyl groups and second reacting the said first reaction product with at least one unsaturated isocyanato carbamate ester prepared by reacting a compound containing at least two isocyanate groups with an ester of an acid selected from the group consisting of acrylic acid, methacrylic acid and cyanacrylic acid containing hydroxyl groups useful in electronics and electrotechnology for layering systems and cast resin materials.

Abstract: Ultraviolet 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. The coating compositions consist essentially of the linear polyacrylate-terminated polyurethane polyurea oligomer in admixture with an ultraviolet curable liquid acrylate or polyacrylate to provide the liquidity needed for application and to adjust the hardness or softness of the cured coating for the selected single coat or topcoat utility. The oligomer contains a linear polyurethane core terminated by urea formation with a polyhydroxy-functional amine containing a single isocyanate-reactive amino hydrogen atom.

Abstract: Ultraviolet 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. The coating compositions consist essentially of the linear polyacrylate-terminated polyurethane polyurea oligomer in admixture with an ultraviolet curable liquid acrylate or polyacrylate to provide the liquidity needed for application and to adjust the hardness or softness of the cured coating for the selected single coat or topcoat utility. The linear polyacrylate-terminated polyurethane polyurea oligomer comprises a linear polyurethane terminated with an essentially monohydric adduct of low molecular weight diprimary amine with from about 1 to about 2.

Abstract: The invention relates to a dental composition which is suitable as a fissure sealant, dental glaze, bonding agent or orthodontic adhesive and which is a mixture of a selected vinyl urethane prepolymer, selected comonomer, and visible light cure catalyst comprising an organic amine and selected .alpha.-diketone.

Abstract: Liquid coating compositions adapted to be cured by exposure to ionizing radiation are disclosed in which a liquid vehicle of coating viscosity having an ethylenically unsaturated portion comprising one or more polyethylenically unsaturated materials adapted to cure on radiation exposure, pigment dispersed in the vehicle, and an acrylate-functional radiation-curable dispersant having free carboxyl group for wetting the pigment and assisting in the stable dispersion of the pigment in the vehicle. This dispersant is an acrylate-functional carboxylic acid amide carrying free carboxyl groups, especially an adduct of a polyacrylate and a stoichiometric deficiency of a primary amine to provide a secondary amine having acrylate functionality, the secondary amine functionality being reacted with a polycarboxylic acid anhydride to form amide groups therewith.

Abstract: A photo-curable resin composition containing urethane oligomer compounds represented by a following general formula (I) ##STR1## [wherein R.sub.1 indicates --H or --CH.sub.3. R.sub.2 indicates an alkylene group with or without side chain having 1 to 6 carbon atoms or --(--CH.sub.2 CH.sub.2 --O--).sub.m --CH.sub.2 CH.sub.2 --, m=1-5. R.sub.3 indicates a substituent selected from a group comprising ##STR2## n is a number selected from integers 1 to 10 so as the molecular weight of compound to be not more than 5000] as a part or the whole of base resin.

Abstract: In the optical connection of telecommuniation glass fibres to semiconductors a curable composition is used which comprises a polyester urethane acrylate or a polyether urethane acrylate. The composition furthermore comprises a heat- or light-activatable initiator.The refractive index of the cured connecting material is adjusted by the addition of both a reactive diluent which increases the refractive index and a reactive diluent which decreases the refractive index. Said reactive diluents furthermore serve to establish the desired mechanical properties of the connecting material prior to and after curing.The curable composition is provided on the glass fibres and/or on the semiconductor laser, after which they are contacted with each other and are optically aligned. The composition is then cured by raising the temperature or by exposure to light.

Abstract: A low viscosity printing ink composition, based on acrylic terminated urethanes, is made which has a rapid curing rate and forms a cured impression that has a good adherence and flexibility. The ink can be used on flexible films, such as sausage casings, without cracking or bleeding.