Abstract: Mixtures of polyisocyanates and epoxides are cured by microwave irradiation, optionally with microwave or thermal post-curing to produce cured polymer articles having good chemical, electrical and mechanical properties.

Abstract: The present invention relates to polyurethanes which contain acryloyl groups, have a viscosity at 23.degree. C. of 800 to 100,000 mPa.s, and are prepared by reacting at an NCO/OH equivalent ratio of 0.7:1 to 1:1,I) an organic isocyanate component containinga) 20 to 50 mole % of one or more organic diisocyanates, other than hexamethylene diisocyanate, which have aliphatically and/or cycloaliphatically bound isocyanate groups and a molecular weight of less than 300 andb) 50 to 80 mole % of hexamethylene diisocyanate withII) a hydroxyl component containingc) 43 to 93 hydroxyl equivalent % of an alcohol component which has an average hydroxyl functionality of 0.8 to 1.

Abstract: The present film-former composition comprises (a) an organosilazane copolymer having a perfluoroalkyl group-containing structural unit and a methacryloyloxy group-containing structural unit, (b) a photosensitizer soluble in an organic solvent, and (c) an organic solvent. The composition is cured by irradiation with ultraviolet light for a short period of time to form a film excellent in water repellency, oil repellency, and hardness.

Abstract: Energy polymerizable compositions comprising at least one cyanate monomer and as curing agent an organometallic compound are disclosed. The compositions are useful in applications requiring high performance, such as high temperature performance; in composites, particularly structural composities; structural adhesives; tooling for structural composities; electronic applications such as printed wiring boards and semiconductor encapsulants; graphic arts; injection molding and prepregs; and high performance binders.

Abstract: A desensitizing ink for printing by wet or dry offset, flexographic or typographic printing is disclosed and claimed. This ink contains at least one desensitizing agent, at least one ink binder which is polymerizable or crosslinkable by UV light or electron beam radiations and, if necessary, an initiator system. Thus, the drying time of the printings is greatly reduced. The ink is free from vaporizable ink solvents.

Abstract: A moisture curable composition comprised of a moisture curable base and a curing agent which does not contain molecular water but which produces water upon activation so as to cure the curable base. The composition exhibits improved stability and shelf life and can be formulated so that curing of the composition can be controlled substantially independently of ambient conditions.

Abstract: The present invention relates to a process for the production of a polyurethane containing acryloyl groups byI) reacting at an NCO:OH equivalent ratio of 1.8:1 to 2.5:1, based on starting components a) and b),a) 0.25 to 0.5 moles of a diisocyanate component comprising one or more organic diisocyanates other than hexamethylene diisocyanate which have a molecular weight below 300 and contain aliphatically and/or cycloaliphatically bound isocyanate groups withb) 0.2 to 0.55 moles of an alcohol component containing acryloyl groups and comprising one or more monohydric alcohols containing acryloyl groups and having a molecular weight of 116 to 144II) mixing the product of step I) withc) 0.5 to 0.75 moles of hexamethylene diisocyanate,III) reacting the resulting mixture withd) 0.1 to 0.65 moles of an alcohol component containing acryloyl groups and comprising one or more monohydric alcohols containing acryloyl groups and having a molecular weight of 116 to 144 ande) 0.15 to 0.

Abstract: A method and apparatus are disclosed for conducting a physical process and a chemical reaction by exposing a material containing a volatile substance to microwave radiation where the morphology of said material will change when exposed to such radiation. The power of said radiation is adjusted over time as the morphology of the material changes to maximize the effect of the radiation in order to produce a product in a minimum amount of time that is substantially free of said volatile substance.The method and apparatus can also be used to conduct such a process or reaction with materials that do not contain a volatile material.In one embodiment a method and apparatus are disclosed for manufacturing a polyimide from a precursor in a solvent by exposing the precursor to microwave radiation in a tuneable microwave resonant cavity that is tuned during imidization to achieve critical coupling of the system. Microwave power is controlled to remove the solvent and obtain the desired level of reaction.

Abstract: Energy polymerizable compositions comprising at least one cyanate monomer and as curing agent an organometallic compound are disclosed. The compositions are useful in applications requiring high performance, such as high temperature performance; in composites, particularly structural composities; structural adhesives; tooling for structural composities; electronic applications such as printed wiring boards and semiconductor encapsulants; graphic arts; injection molding and prepregs; and high performance binders.

Abstract: This invention provides novel polymers containing alkyl vinylidene cyanide moieties that exhibit nonlinear optical and piezoelectric properties. The polymers have utility as media in optical devices.

Abstract: An improved stereolithography method for building a three-dimensional article including the steps of patternwise curing successive layers of a bath of curable liquid resin formulation until the article has been completely built up, removing the article from the liquid resin bath and then post-curing the article, wherein the liquid resin is a "thiol/nene" formulation including:(a) a first compound having a plurality of norbornene groups thereon;(b) a second compound having a plurality of thiol groups therein; and(c) a free radical photoinitiator,the total functionality of the formulation being greater than 4.

Abstract: A photosensitive composition contains an alkali-soluble polymer having a phenol skeleton in its structure and a heterocyclic compound represented by formula (I-1) or (I-2), formula (II-1) or (II-2), any of formulas (III-1) to (III-8), any of formulas (IV-1) to (IV-12), or any of formulas (V-1) to (V-4) described in the claims and specification. A photosensitive composition containing a heterocyclic compound represented by formula (I-1) or (I-2), any of formulas (III-1) to (III-8), any of formulas (IV-1) to (IV-12), or any of formulas (V-1) to (V-4) can be suitably used as a negative resist. A photosensitive composition containing a heterocyclic compound represented by formula (II-1) or (II-2) can be suitably used as a positive resist. A photosensitive composition containing an alkali-soluble polymer having a phenol skeleton in its structure and a polymer having a nitrogen-containing heterocyclic compound as a polymeric unit is also included in this invention.

Abstract: An energy polymerizable composition and process therefore, comprising a cationically polymerizable material and a catalytically effective amount of an ionic salt of an organometallic complex cation as polymerization initiator, said ionic salt of an organometallic complex cation being capable of adding an intermediate strength nucleophile or upon photolysis capable of liberating at least one coordination site, said metal in said organometallic complex cation being selected from elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB are disclosed. Certain of the organometallic metallic polymerization initiators are novel cationic salts.

Abstract: Non-centrosymmetric films are shown that exhibit pyroelectric and piezoelectric properties. The films, which comprise alternating layers of omega-tricosenoic acid and omega-tricosenoic amine of up to nine layers thick, and alternatively, layers of polymeric amphiphiles that utilize their liquid crystalline side chains to impose order on the lamiante structures, are useful in constructing devices for measuring temperature and pressure functions.

Abstract: Compounds of the general formula I ##STR1## are described in which Q denotes ##STR2## R denotes alkyl, hydroxyalkyl or aryl, R.sup.1 and R.sup.2 denote H, alkyl or alkoxyalkyl,R.sup.3 denotes H, methyl or ethyl,D.sup.1 and D.sup.2 denote saturated hydrocarbon groups,E denotes alkylene, cycloalkylene, arylene, saturated or unsaturated heteroyls or a group of the formula II ##STR3## a and b denote integers from 1 to 4. c denotes an integer from 1 to 3,m denotes 2, 3 or 4, depending on the valency of Q, andn denotes an integer from 1 to m, where all radicals of the same definition may be identical to or different from one another.The compounds are suitable as polymerizable compounds for photopolymerizable mixtures and are distinguished by ready polymerizability in combination with photoinitiators and long shelf lives in the layer.

Abstract: An anaerobically curing adhesive sealing composition comprising (A) a mono(meth)acrylate monomer represented by formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; and R.sub.2 represents ##STR2## and (B) a (meth)acrylate prepolymer having a urethane structure in the main chain thereof and having an average molecular weight of 10,000 or more and further containing (C) a (meth)acrylate prepolymer having a urethane structure in the main chain thereof and an average molecular weight of at most 5,000. The sealing composition exhibits, upon curing, excellent elasticity and properties to follow an adherend while retaining excellent resistance to oil and heat as possessed by acrylate type reactive sealing compositions.

Abstract: A compound of general formula ##STR1## in which X.sup.- represents one equivalent of an anion; R.sup.5 represents a hydrogen atom or a methyl group; each R.sup.4 independently represents a methyl or ethyl group; and each of R.sup.1, R.sup.2 and R.sup.3 independently represents a hydrogen or halogen atom, an alkyl, alkoxy or alkylthio group having from 1 to 4 carbon atoms, an arylthio group or a group of formula ##STR2## in which R.sup.4, R.sup.5 and X have the meanings given above, are useful as water soluble co-polymerizable photoinitiators.

Abstract: The compositions of this invention posses both calcium hydroxide cement characteristics and light cure characteristics and hence strong bonds are likely to form with both the tooth and conventional filling materials. There is less likelihood that a filling may fall out of a cavity.The present invention provides a two component composition which comprises a first component comprising an ethylenically polymerizable compound which contains both a salicylate group and at least one acrylate, alkacrylate, acrylamide or alkacrylamide group and second component comprising calcium hydroxide or a suitable precursor to calcium hydroxide.

Abstract: A curable thiol-ene formulation comprising(a) a polythiol(b) a 'ene compound having a plurality of groups of the formula: ##STR1## where Q is CH.sub.2, CHCH.sub.3, C(Ch.sub.3).sub.2, O, S, NR.sup.1 or SO.sub.2 R.sup.1 is H or alkyl, and m is 0-10, and(c) an effective amount of a free radical initiator.

Abstract: This invention relates to a natural or synthetic gemstone or mineral substrate having on its surface an adherent photo-product coating, and a method for coating that substrate, which coating is formed by exposing to light in the presence of an oxygen source, a reactant mixture comprising: 2,2'4,4'-tetrahydroxybenzophenone, with (1) ammonium hydroxide and optionally a trace amount of at least one reactive metal, or (2) ammonium hydroxide and at least one metal salt, or (3) at least one metal salt and at least one amine, or (4) ammonium hydroxide, at least one metal salt and at least one amine; in a suitable solvent.

Abstract: This invention relates to photo-product compositions, and a process for making those compositions, comprising the reactant mixture formed by contacting: 2,2',4,4'-tetrahydroxybenzophenone, with (1) ammonium hydroxide and optionally a trace amount of at least one metal, or (2) ammonium hydroxide and at least one metal salt, or (3) at least one metal salt and at least one amine, or (4) ammonium hydroxide, at least one metal salt and at least one amine; in a suitable solvent, wherein a photo-product is formed upon exposure of this reactant mixture to light in the presence of an oxygen source.

Abstract: A process for preparing particulate water-soluble cationic acrylic polymers having a high molecular weight, an excellent water solubility and a uniform particle size with a good productivity by adding a combined photoinitiator system of an azoguanyl compound and other usual photoinitiator to an aqueous monomer solution containing a cationic vinyl monomer, irradiating the aqueous monomer solution in the form of a thin layer on a moving support with ultraviolet rays in at least two stages, and finely dividing the produced aqueous polymer gel in a wet state by a roller cutter and then by a vertical cutter.

Abstract: A conductive polymer is set forth which comprises a plurality of interconnected units. Each unit comprises a generally centrally positioned moiety and a ligand or set of ligands having a total dentation capability of three or more non-coplanar dentations and being positioned about the centrally positioned moiety, at least two of the dentations being parts of conjugated systems. The units are interconnected by having at least one ligand in common and the conjugation of the conjugated systems extend from one centrally positioned moiety to an adjacent centrally positioned moiety. Through proper selection of ligands and centrally positioned moieties, conductive polymers of various desired characters including intrinsically conductive polymers, p-type semiconductor polymers, n-type semiconductor polymers, p-type metal conducting polymers and a n-type metal conducting polymers can be constructed.

Abstract: The instant invention is directed to a process for the manufacture of poly(dimethyldiallyl ammonium chloride) comprising:(a) casting upon a continuous belt apparatus to form a film having a thickness of 1/4 inch to 1 inch an aqueous dimethyldiallyl ammonium chloride solution having a monomer concentration of at least 65 percent, by weight, monomer, said monomer solution also containing a photoreducible dye in a concentration of 1.times.10.sup.-7 to 1.times.10.sup.-4 moles per liter, a mild reducing agent in a concentration of 1.times.10.sup.-5 to 1.times.10.sup.-2 moles per liter and thermal initiator in a concentration of 1.times.10.sup.-5 to 1.times.10.sup.-2 moles per liter;(b) passing of the solution under a series of lights which emit visible light at an intensity of 0.1 to 10,000 foot candles and controlling the temperature of the monomer solution in the range of 5.degree. C. to 65.degree. C.

Abstract: An improved process for preparing a water-soluble polymer having an excellent water solubility and a high molecular weight, which comprises subjecting a thin layer of an aqueous solution of a water-soluble vinyl monomer to polymerization on a solid support, covering the thin layer with a substantially water-insoluble organic material, e.g. a paraffin, a silicone oil or a low molecular polyethylene, and/or a slightly water-soluble or substantially water-insoluble alkylene oxide adduct at least at a point of time when the aqueous monomer solution has not freely flowed, and further continuing the polymerization.

Abstract: The specification describes a composition curable by high-energy radiation in the presence of oxygen which contains conventional monomers, oligomers and/or polymers curable by high-energy radiation besides minor amounts of a natural wax, a solvent extraction product of a natural wax, a wax alcohol, a wax ester and/or a wax carboxylic acid. The specification also describes the preparation of said composition and the use thereof in the formation of coatings.

Abstract: The invention relates to acrylic telomers with grafts which can be cross linked by light, methods of synthesizing them and their applications. The telomers comprise a telogen of the mercaptan family, in particular dodecanethiol, and links of a taxogen of the acrylic family, some of which are grafted. The telomers are synthesized semi-continuously by radical initiation in the presence of initiators such as azobisisobutyronitrile, at a temperature below 75.degree. C., making it possible to obtain a number of links adapted to the desired applications. Grafting is carried out by means of glycidyl and aziridinyl groups.

Abstract: An antistatic resin composition which is the electron radiation cured reaction product of an electron radiation curable prepolymer and an electron radiation reactive antistatic agent soluble in the prepolymer. An antistatic laminate is made by applying a mixture of the prepolymer and antistatic agent to a substrate and then contacting the mixture with electron radiation.

Abstract: An improved process for preparing a sticky water-soluble polymer, e.g. acrylamide polymers and acrylic acid polymers, which comprises polymerizing an aqueous solution of a monomer in a polymerization vessel of which the surface contacting the aqueous monomer solution is covered with a tetrafluoroethylene-ethylene copolymer film, whereby the stickiness of the produced polymer to the vessel is remarkably decreased, namely the peelability of the polymer from the vessel is remarkably improved, and moreover the polymerization conversion is remarkably improved. Also, the use of a metal deposited tetrafluoroethylene-ethylene copolymer film as a covering material improves the efficiency of a photopolymerization and enables to use a polymerization vessel made of an inexpensive material.