Abstract: Disclosed herein are low viscosity and low stress dental compositions comprising at least one low stress polymerizable resin and at least one filler. The dental compositions described herein have high depth of cure and self-leveling characteristics and are capable of bulk application.

Abstract: The invention describes a composition comprising, in the form of aqueous dispersion, A) for every 100 parts by weight of a, or of a plurality of, (meth)acrylate polymer(s); B) from 1-400 parts by weight of a, or of a plurality of, (meth)acrylate polymer(s), which contain(s) a compound of the formula (I) copolymerized, where the (meth)acrylate polymer(s) B) differ from the (meth)acrylate polymers specified in A), where these are obtainable by emulsion polymerization of a mixture comprising a) from 0.1 to 99.9 percent by weight of at least one compound of the formula (I), preferably of a benzophenone (meth)acrylate, in which the definitions of the moieties are those given in the description; and b) from 99.9 to 0.

Abstract: The invention provides a polymerizable composition including an oxime ester photopolymerization initiator, an organic acid anhydride having a molecular weight of 300 or less, and a polymerizable compound.

Abstract: A grafting reagent and related method of using the reagent to form a polymeric layer on a support surface, and particularly a porous support surface, in a manner that provides and/or preserves desired properties (such as porosity) of the surface. The reagent and method can be used to provide a thin, conformable, uniform, uncrosslinked coating having desired properties onto the surface of a preformed, and particularly a porous, polymeric substrate.

Abstract: The present invention provides a polymerizable compound denoted by general formula (1). In general formula (1), A denotes an oxygen atom, sulfur atom, or NR, R denotes a hydrogen atom, alkyl group, aryl group, or heterocyclic group, X denotes a hydrogen atom, polymerizable group, optionally polymerizable group-substituted alkyl group or the like, B and C each independently denote a hydrogen atom, halogen atom, polymerizable group, optionally polymerizable group-substituted alkyl group or the like, wherein at least one from among B and C denotes a hydrogen atom and at least one from among X, Y, and Z comprises a polymerizable group, m denotes an integer ranging from 0 to 5, n denotes an integer ranging from 0 to 2, and Q denotes an elimination group.

Abstract: A composition comprising the Components (A) at least one linear olefin polymer; (B) 0.05 to 2%, relative to the weight of Component (A), of at least one photoinitiator; and (C) 0.05 to 5%, relative to the weight of Component (A), of at least one co-additive containing one or more double bonds.

Abstract: Disclosed herein is a macro-photoinitiator comprising a photoinitiator covalently bound to a polymer. Also disclosed herein is a process for the enzymatic polymerization of monomers and photoinitiators performed at atmospheric pressure and relatively low temperatures to form the macro-photoinitiator.

Abstract: The invention provides methods for inducing reversible chain cleavage of polymer chains in a crosslinked polymeric material. Reversible cleavage of the polymer backbone is capable of relieving stress in the polymeric material as the bonds reform in a less stressed state. The invention also provides methods for making polymeric materials capable of reversible chain cleavage, materials made by the methods of the invention, and linear monomers containing reversible chain cleavage groups which are useful in the materials and methods of the invention.

Abstract: In a pressure-sensitive adhesive composition or a pressure-sensitive adhesive sheet containing an energy ray-curable polymer, problems associated with the volatilization of a low molecular weight compound contained in the composition are overcome. An energy ray-curable polymer characterized by comprising a radical generating group, which is capable of initiating a polymerization reaction upon excitation with an energy ray, and an energy ray-polymerizable group bonded together in the main or side chain.

Abstract: High durable polarized film comprising a radiation curable PSA layer for lamination in TFT/LCD applications have high humidity and heat resistance. In one embodiment, the adhesive comprises a UV curable acrylic polymer, a compatible tackifier, a multifunction unsaturated oligomer, and a long chain alkyl acrylate monomer.

Abstract: The present invention provides a curable composition comprising a compound having a partial structure represented by the following formula (I) and a partial structure represented by the following formula (II): wherein in formula (I), A represents a group capable of forming a four- or more-membered bivalent alicyclic alkyl group with neighboring carbon atoms; and in formula (II), R1 represents an alkylene, a cycloalkylene, or an arylene group, and n represents an integer of 1 or more.

Abstract: A novel polymeric initiator is disclosed comprising a dendritic polymer core with at least one initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. The polymeric initiators are useful in radiation curable compositions such as varnishes, lacquers and printing inks and are especially useful in radiation curable inkjet inks.

Abstract: An article comprising an adhesive attachment region is provided. The adhesive attachment region comprises a radiation curable hot melt pressure sensitive adhesive.

Abstract: UV-crosslinkable acrylic hotmelt pressure sensitive adhesives comprising acrylic and vinyl monomers, and a polymerizable UV photoinitiator. The photoinitiator comprises a spacer comprising both ethylene oxide and urethane, or urea, carbonate, or siloxane functional groups. The ethylene oxide is directly bonded to the chromophore (e.g., benzophenone) moiety, while the urethane (or urea, carbonate, siloxane) is closely linked to the polymerizable moiety (e.g., styrenic C?C double bond).

Abstract: Benzophenone/thioxanthone derivatives useful as photoinitiators are provided as well as photopolymerizable compositions comprising the benzophenone/thioxanthone derivatives.

Abstract: Disclosed is a photosensitive resin composition. The composition comprises [A] an alkali-soluble resin, [B] a photoactive compound and [C] a solvent. The alkali-soluble resin is a copolymer including at least one structural unit with an aziridine group. The composition exhibits good storage stability, high sensitivity, high UV transmittance, high residual film ratio, improved coating uniformity and excellent pattern-forming properties. Further disclosed is an organic insulating film formed using the composition. The organic insulating film has excellent resistance to solvents and chemicals.

Abstract: Hydrophilic compositions are described, which are prepared from a first oligomer containing pendent polymerizable groups and pendent hydrophilic groups, crosslinked with a co-reactive second component oligomer possessing photoinitiator groups. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.

Abstract: Dental materials which contain a radically polymerizable organic binder, at least one radical polymerization initiator and at least one radical polymerization accelerator, both the initiator and the accelerator each having at least one radically polymerizable group.

Abstract: Hydrophilic compositions are described, which are prepared from a first oligomer containing pendent polymerizable groups and pendent hydrophilic groups, crosslinked with a co-reactive second component oligomer possessing photoinitiator groups. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.

Abstract: A photosensitive adhesive composition of the polymerizable resin type, the hardening of which occurs by polymerization and/or reticulation, includes:—initiators for at least one chain polymerization reaction to guarantee the hardening of the composition and a sufficient quantity of at least one bifunctional monomer, including a photolabile center with at least one photolabile entity and at least two polymerizable units, connected by covalent skeletons to the photolabile center and located away from the cleavage sites of the photolabile center, such that the composition loses the integrity and adhesivity thereof under the influence of a reticulating radiation causing the cleavage of the photolabile sites. The composition is particularly of application in dentistry.

Abstract: A novel photoreactive polymer is disclosed comprising a dendritic polymer core with at least one initiating functional group and at least one co-initiating functional group. The photoreactive polymers are useful in radiation curable compositions are varnishes, lacquers, printing inks and radiation curable ink-jet inks. The dendritic polymeric core is preferably a hyperbranched polymer.

Abstract: A process for preparing a polyacrylate-based shaped article, a polyacrylate being polymerized by a conventional method, wherein the polyacrylate comprises copolymerized comonomers having thermally crosslinkable groups and comonomers having attached photoinitiators, and the polyacrylate is crosslinked thermally in a first step and by irradiation with UV light in a second step.

Abstract: A radiation curable composition comprising a novel photoreactive polymer is disclosed comprising a dendritic polymer core with at least one initiating functional group and at least one co-initiating functional group. Suitable radiation curable compositions are varnishes, lacquers, printing inks and radiation curable ink-jet inks. The dendritic polymeric core is preferably a hyperbranched polymer.

Abstract: Photoreactive dendrimers comprising a core portion, branching units and terminal groups, wherein at least one terminal group and/or branching unit is a photoreactive group and wherein the photo reactive groups include preferably cinnamates, coumarins, benzylidenephthalimidines, benzylideneacetophenones, diphenylacetylenes stilbazoles, uracyl, quinolinone, maleinimides, or cinnamylidene acetic acid derivatives and are able to undergo photocyclization, in particular [2+2]-photocyclization.

Abstract: An ultraviolet ray curing type resin composition comprising (A) an urethane acrylate produced from, as essential ingredients, an isocyanate compound comprising an aliphatic isocyanate compound and an alicyclic isocyanate compound at a molar ratio of from 80/20 to 20/80; a polyol compound comprising an ester-based polyol, an ether-based polyol or a polycarbonate-based polyol; and an acrylate compound having a hydroxyl group, (B) an acrylate-based reactive diluent, and (C) a photo-reactive initiator. The coated film obtained by coating the composition to a substrate, followed by photocuring has a following capability in molding owing to its excellent elongation, and only-causes a low level of yellowing upon long time heating to show an excellent thermal resistance. The cured product has a decreased residual odor and, therefore, useful in improving designing property and beauty in using for an automobile interior or the like.

Abstract: Hydrophilic compositions are described, which are prepared from a first oligomer containing pendent polymerizable groups and pendent hydrophilic groups, crosslinked with a co-reactive second component oligomer possessing photoinitiator groups. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.

Abstract: A radiation-curable low stress relaxation elastomeric material with improved elastic and mechanical properties. The elastomeric material may be used alone or with skin layers to form elastomeric films, webs, laminates and products containing them.

Abstract: Process for preparing crosslinked pressure-sensitive adhesives at least partly based on block copolymers comprising at least one polyvalent thioether unit, characterized in that at least the following process steps are carried out: two-stage or multi-stage free-radical addition polymerization of at least two copolymerizable monomers in the presence of at least one polyvalent mercaptan, at least one of the monomers being functionalized such that on irradiation with ultraviolet rays it initiates a UV crosslinking, the polymerization producing block copolymers containing at least one polyvalent thioether unit, coating of the polymer from the melt onto a backing, crosslinking of the polymer on the backing by irradiation with ultraviolet radiation.

Abstract: There is disclosed an ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, an stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.

Abstract: Radiation curable compositions with a polymeric co-initiator are disclosed comprising a dendritic polymer core with at least one co-initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. Industrial applications include varnishes, lacquers and printing inks. The polymeric co-initiator is especially useful in radiation curable inkjet ink.

Abstract: A polymer having ?,? unsaturated groups and a group that generates a free radical when exposed to actinic radiation. The polymer may be self-cross-linking.

Abstract: A dry film photoresist includes a functional polymer. The functional polymer has ?,?-unsaturated groups and groups that generate a free radical upon exposure to actinic radiation.

Abstract: A wax-tethered photoinitiator that is a photoinitiator compound including a wax chain therein, wherein the photoinitiator compound is activated by ultraviolet radiation, and method of making the same is described. The wax-tethered photoinitiator may be used in a curable wax composition for incorporation into a toner. The wax-tethered photoinitiator exhibits an affinity for the wax phase, thereby insuring its presence in the wax for the initiation of curing thereof.

Abstract: A curable composition is described comprising a Michael donor component, a polyacryl component, and a monoacryl component, where at least one of the Michael donor or monoacryl components comprises a pendent photoinitiator group. A Michael addition polymer that is the Michael addition reaction product of these components is also described.

Abstract: A process for increasing the molecular weight of polyacrylates, characterized in that polyacrylates which are functionalized at least on one part of their chain ends by photoinitiator groups X are exposed to actinic radiation, so that a direct linking reaction of the polyacrylates takes place.

Abstract: A hotmelt adhesive having a melting point of at least 40° C. is provided which may be hardened in multiple stages and which is useful in the production of laminates. The hotmelt adhesive may contain a polymer with at least one functional group that is reactive towards a compound with an acidic hydrogen atom and with one functional group that can be polymerized by UV or electron beams, or a polymer with at least one functional group that is reactive towards a compound with an acidic hydrogen atom and with no functional group that can be polymerized by UV or electron beams. These polymers may be used in combination with a relatively low molecular compound with a functional group that can be polymerized by UV or electron beams.

Abstract: Self-photoinitiating liquid oligomeric compositions are disclosed. The oligomeric compositions are formed from multifunctional mercaptans and Michael addition polyacrylate resins, synthesized from multifunctional acrylates and ?-dicarbonyl Michael donors, specifically ?-keto esters, ?-diketones, ?-ketoamides or ?-ketoanilides or combinations thereof The oligomeric compositions are provided along with uses thereof and methods of fabricating.

Abstract: Compounds of formula (I): {where n is a number from 1 to 6; R3 is hydrogen, methyl or ethyl; A represents a group of formula —[O(CHR2CHR1)a]y—, —[O(CH2)bCO]y—, or —[O(CH2)bCO](y?1)—[O(CHR2CHR1)a]— (where one of R1 and R2 is hydrogen and the other is hydrogen, methyl or ethyl); a is from 1 to 2; b is from 4 to 5; y is from 3 to 10; Q is a residue of a polyhydroxy compound having 2 to 6 hydroxy groups; and x is greater than 1 but no greater than the number of available hydroxyl groups in Q} and esters thereof are useful as photoinitiators for the preparation of energy-curable compositions, such as varnishes and printing inks.

Abstract: A polymer having ?,? unsaturated groups and a group that generates a free radical when exposed to actinic radiation. The polymer may be self-cross-linking.

Abstract: A UV-transparent pressure sensitive adhesive comprising (a) a copolymer of (a1) from 75 to 99.8% by weight of acrylic esters and/or methacrylic esters of the formula CH2?CH(R1)(COOR2), where R1 is H or CH3 and R2 is an alkyl chain having 1 to 20 carbon atoms; (a2) from 0 to 10% by weight of acrylic acid and/or methacrylic acid of the formula CH2?CH(R1)(COOH), where R1 is H or CH3; (a3) from 0.2 to 5% by weight of olefinically unsaturated monomers which contain at least one UV-crosslinking functional group per monomer; and (a4) from 0 to 20% by weight of olefinically unsaturated monomers which contain at least one functional group per monomer; the copolymer having a weight average molecular weight of less than 300,000 g/mol and (b) from 2 to 20% by weight, based on the weight of copolymer, of a silicate filler, the silicate filler having a maximum particle diameter of 50 nm; and having a residual solvent fraction of less than 1%, based on the pressure sensitive adhesive.

Abstract: A formulation for repelling particulate matter on the surface of a coating comprising polymeric nanoparticles having a mean particle diameter of from 1 to 50 nm. The polymeric nanoparticles may further be functionalized to impart additional characteristics to modify the surface of the dried coating to minimize the chances for particles to become embedded or attached to the coating.

Abstract: Compounds useful as surface coating agents, including compounds of the formula: wherein X1 comprises a first photoreactive species; X2 comprises a second photoreactive species; Y comprises a nonpolymeric core molecule comprising an aromatic group; and Z comprises at least one charged group. The Y core can include an aromatic group such as a benzene radical, the charged groups Z can be independently selected from the organic acids that include sulfonic acid, carboxylic acid, and phosphoric acid, and the photoreactive species of X1 and X2 can independently be aryl ketones, such as those selected from the group acetophenone, benzophenone, anthraquinone, anthrone, and anthrone-like heterocycles, and their substituted derivatives.

Abstract: The present invention relates to water soluble radiation activatable polymer resin formulations which are suitable to modify the absorption properties of fibrous materials and the polymer obtained by such radiation activatable polymer resins and the method of preparing such polymer. Fibrous materials made with radiation activatable resin formulations according to this invention are especially suitable for use in disposable absorbent articles.

Abstract: Compounds of the formula I are suitable photoinitiators which accumulates at the surface of the formulation in which R is for example phenyl and A is a surface-active radical of the formula III Y is a divalent group C3–C12cycloalkylene, C6–C12bicycloalkylene; C1–C6alkylenen-C3–C12cycloalkylene, C1–C6alkylene- C6–C12bicycloalkylene or C1–C10alkylene interrupted by one or more non-consecutive C3–C12cycloalkylene, —U—C3–C12cycloalkylene, C6–C12bicycloalkylene or —U—C6–C12bicycloalkylene; C1–C10alkylene interrupted by one or more non-consecutive O and C3–C12cycloalkylene, —U—C3–C12cycloalkylene, C6–C12bicycloalkylene and/or —U—C6–C12bicycloalkylene; U is U? or U? U? is —(CH2)aCOO—; U? is —Si(CH3)(CH3)— or —(CH2)a—Si(CH3)(CH3)—, a is a number from 1 to 10; b is a number from 0 to 10; with the proviso that they are, however, at least 1 if the methylene group in question is between two oxygen atoms.

Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from oligomers having pendent hydrophilic, poly(alkylene oxide) groups, pendent photoinitiator groups, and optionally polymerizable functional groups, and crosslinked by polyfunctional poly(alkylene oxides).

Abstract: A crosslinkable UV absorbing agent prepared by the following steps: (1) preparing a mixture of reactants comprising a UV absorbing compound (A) with multiple pendant hydroxyl groups and an unsaturated monoglycidyl compound (B) with both reactive glycidyl and vinyl groups; (2) mixing a base catalyst (C) with the mixture of reactants; (3) initiating a synthesis reaction of the crosslinkable UV absorbing agent under heating; and (4) recovering the resulting product after the synthesis reaction is completed. The crosslinkable UV absorbing agent is directly applicable in the lens formulation to replace conventional crosslinking agent and UV absorber used in the production of the soft contact lens without any purification or modification.

Abstract: Compounds of formula Ia, Ib and Ic, (Ic), in which R, R1 and R2 are e.g. phenyl, naphthyl, anthracyl, phenanthryl or a heterocyclic radical, are suitable as photoinitiators which accumulate at the surface of coatings.

Abstract: The invention relates to macromolecular hydrophilic photocrosslinkers having polymeric backbones of substituted ethylene groups carrying photoactive groups. The photocrosslinkers are capable of producing, when being exposed to light of determined wavelengths above 305 nm, radicals which are retained on the macromolecular photocrosslinkers and reacting so as to accomplish a crosslinked network structure. The invention further relates to the preparation of photocrosslinkers, their use in different aqueous systems and their utility in production of medical devices including ophthalmic lenses.

Abstract: Process for preparing UV crosslinkable acrylic pressure sensitive adhesives, which comprises reacting polyacrylates in the melt with UV-photoactive substances in a hotmelt process in a polymer-analogous reaction, the UV-photoactive substances being able to absorb radiation energy and transfer it to a reaction system.

Abstract: A resin composition comprising: (A) particles prepared by bonding at least one oxide of an element selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, germanium, indium, tin, antimony, and cerium, and an organic compound which includes a polymerizable unsaturated group, (B) an oligomer-type radiation polymerization initiator having a site which generates photo-radicals by irradiation of radioactive rays, and (C) a compound having at least two polymerizable unsaturated groups in the molecule.