Abstract: An energy-ray curing resin composition comprising a photopolymerizable resin component which can be cured by irradiation with an energy ray, a photopolymerization initiator component which makes it possible to cure the above photopolymerizable resin component by irradiation with an energy ray and a curing agent component used for curing at least one of the above photopolymerizable resin components by a method other than irradiation with an energy ray. To provide a high curability energy-ray curing resin composition which has a very high curing capacity as compared with those of conventional energy-ray curing resins and which is simple and has a high design freedom.

Abstract: A one-pack type dental adhesive composition that does not require a pre-treatment such as an etching treatment and a priming treatment and can surely adhere a dental restoration material to a tooth structure and keep an adhesive effect over a long period of time, comprised of a polymerizable composition containing (a) 1˜5% by weight of a polymerizable monomer containing a phosphoric acid group, (b) 10˜40% by weight of a polymerizable monomer containing a plurality of carboxyl groups in one molecule, or being readily reactive with water to generate a plurality of carboxyl groups in one molecule, (c) 20˜40% by weight of an acid group-free polymerizable monomer or a mixture of two or more acid group-free polymerizable monomers, both having a solubility of water at 25° C. of 25% by weight or less, and (d) 15˜50% by weight of water, with (e) 0.1˜5.

Abstract: An unsaturated polyester compound having an ethylenically unsatureated group in its terminal and hydroxymethyl group in its side chain is obtained by the reaction of (a) a compound containing at least two oxetane rings in its molecule with (b) a compound containing at least two carboxyl groups in its molecule and (c) an unsaturated monocarboxylic acid in the presence of a reaction promotor in such a proportion that the ratio of said compound (b) to said compound (a) falls in the range of 0.1<(b)/(a)<1. BY further reacting (d) a polybasic acid anhydride with the resultant unsaturated polyester compound (A?), there is obtained an actinic energy ray-curable resin which is soluble in an aqueous alkaline solution. A photocurable and/or thermosetting composition is obtained by mixing the unsaturated polyester compound (A?) and/or the actinic energy ray-curable resin with a polymerization initiator (B).

Abstract: A composition and a method of use as a dental restorative. A series of highly alkoxylated tri-functional monomers are used as a low viscosity monomer in a photo- or self-curable dental composition that resulted in low polymerization shrinkage. The mechanical strength of the restorative material was not compromised. The restorative composition may be used as a dental filling material, a cement, a liner/base, or an adhesive.

Abstract: Blends of monofunctional and multifunctional (meth)acrylate monomers, optionally in addition to oligomeric multifunctional (meth)acrylates), can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having a glass transition temperature of at least 35° C. and having physical properties making them suitable for use as microstructure-bearing articles.

Abstract: A curable composition includes a multifunctional (meth)acrylate; a substituted or unsubstituted arylether (meth)acrylate monomer; and a polymerization initiator. The compositions exhibit high refractive indices and, upon polymerization, the compositions provide films having excellent thermomechanical properties.

Abstract: Fluid silico-acrylic compositions, stable in the long term, polymerizable thermally and by radiatiion, by mechanism giving rise to free radicals, with a very low water (less than 1%) and volatile solvent content, containing silica, a silane, and a multifunctional acrylic monomer, in which the silica is in the form of indivualized particles with an average diameter with the range 9 amd 100 nm, not interconnected by siloxane bonds, the silane is a vinyl silane with the formula (I) H2C═CH—Si(OR)3  (I) in which R represents a methyl or ethyl radical, and the multifunctional (meth)acrylic monomer is an alkoxylated (meth)acrylate, method for preparation and use for the development of anti-scratch transparent and uncoloured varnishes, obtained by polymerization giving rise to free radicals by radiation (UV, electron bundles) or thermally.

Abstract: A light-curable resin composition includes an acrylate oligomer, an acrylate monomer having 4 or less functional groups, a photopolymerization initiator, a hardness enhancing agent represented by the formula(1), m-terphenyl represented by the formula(2) and a colloidal antistatic agent. The light-curable resin composition has a high antistatic property and a light transmittance, as well as a high hardness and a low shrinkage rate.

Abstract: Disclosed is light-curing dental adhesive compositions i) based on the multifunctional prepolymer mixture of 2,2-bis-(4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl)propane (“Bis-GMA”) and multifunctional prepolymer formed by substituting hydrogen atoms in hydroxyl group with methacrylate groups in the Bis-GMA molecules; and ii) comprising an adhesive monomer having both a hydrophobicity and hydrophilicity, a hydrophilic monomer, a photoinitiation system and a diluent.

Abstract: The invention relates to a coating material that can be cured thermally or by actinic radiation and that contains at least one component (a1) with at least two functional groups (a11) which serve for cross-linking, by actinic radiation, and at least one functional group (a12) that can enter into thermal cross-linking reactions with the hydroxyl and/or thiol groups (a21) in component (a2), at least one branched cyclic and/or acyclic C9-C16 alkane (a2)) that is functionalized with at least two hydroxyl or thiol groups (a21) or with at least one hydroxyl and at least one thiol group, and optionally at least one photo initiator (a3), at least one initiator of the thermal cross-linking reaction (a4), at least one reactive diluent that is cured by actinic radiation and/or thermafly, at least one lacquer additive (a6), at least one thermally curable component (a7) and/or at least one organic solvent (a8).

Abstract: The invention discloses a photopolymerizable composition comprising at least one, ethylenic unsaturated bond-containing compound, a hexaaryl-biimidazole compound, and an organoboron compound represented by a specific general formula; and discloses a photosensitive thermal recording material having a recording layer that contains the photopolymerizable composition. The photopolymerizable composition and the photosensitive thermal recording material of the invention are highly sensitive to UV rays and visible to IR rays falling within a wavelength range that includes wavelengths not longer than 450 nm, and are effective for decoloring a dye component that absorbs the rays falling within the wavelength range.

Abstract: Compositions for use in the manufacture of three-dimensional objects including compositions for use as a support and/or release material in the manufacture of the three-dimensional objects are provided. There is thus provided, in accordance with an embodiment of the present invention, a composition suitable for building a three-dimensional object. The compositions may include, inter alia, a curable component, having a functional group, wherein if the functional group is a polymerizable reactive functional group, then the functional group is a (meth)acrylic functional group, a photo-initiator, a surface-active agent and a stabilizer; wherein said composition has a first viscosity of about 50-500 cps at a first temperature, wherein said first temperature is ambient temperature, and a second viscosity lower than 20 cps at a second temperature wherein said second temperature is higher than said first temperature, wherein, after curing, the composition results in a solid form.

Abstract: An adhesive composition that includes a mixture of a cationically polymerizable component, an acidic component, and an initiator is provided. Preferably, the initiator comprises an iodonium salt, a visible light sensitizer, and an electron donor compound, wherein the initiator has a photoinduced potential greater than or equal to that of N,N-dimethylaniline in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone. This adhesive composition is cationically polymerizable and is able to bond to hard tissue and cationic restorative materials upon curing.

Abstract: The polyimides of this invention are derived from a Diels-Alder cyclopolymerization of a photochemically generated bisdiene with dienophiles, such as bismaleimides, trismaleimides and mixtures thereof with maleimide end-caps. Irradiation of one or more diketones produces two distinct hydroxy o-quinodimethane (photoenol) intermediates. These intermediates are trapped via a Diels-Alder cycloaddition with appropriate dienophiles, e.g., bismaleimide and/or trismaleimides to give the corresponding polyimides in quantitative yields. When bismaleimides, trismaleimides or mixtures thereof with maleimide end-caps are used as the dienophile, the resulting polyimides have glass transition temperatures (Tg) as high as 300° C. Polyimide films can be prepared by ultraviolet irradiation of high solids content varnishes of the monomers in a small amount of solvent, e.g., cyclohexanone, dimethyl formamide, N-methylpyrollidone and the like.

Abstract: An ink-jet ink is provided including an ink jet vehicle and a colorant. The vehicle includes at least 35% by weight radiation curable material, based on the total vehicle weight. The vehicle may but does not necessarily include a thickener. The vehicle is a paste or a solid at 20° C. and has a viscosity of less than 25 centipoise between 40° C. and 130° C.

Abstract: A radiation curable coating contains an agent that imparts greater strippability to the cured coating. The agent can be included in the coating or in one or more subsequently applied maintenance coats.

Abstract: Forming graft copolymers in water using labeling of water soluble polymers with photoinitiators. Water soluble polymers can form environmentally responsive hydrophobically stimulated cages. The cages, which contain initiating radicals after irradiation, may be “opened” or “closed” by changes in environmental conditions. When the cage is closed, the radicals are trapped inside and thus do not cause substantial polymerization of water soluble monomers in the same solution. When the cage is closed, the radicals escape and cause polymerization. In another variation, hydrogels and graft copolymers are formed by covalently linking phototoinitiator groups to water soluble polymers that do not form cages. Thus, monomers may form grafts to the polymer, allowing formation of physical hydrogels.

Abstract: The invention relates to a binder for powder coating materials having an oligomeric or polymeric substructure which are curable thermally and/or by means of high-energy radiation, said binder comprising in each case terminally and/or laterally at least one vinyl ether group a) and at least one group b) which is different from the vinyl ether groups a) but is coreactive with said groups a), there being on average at least one vinyl ether group a) and one coreactive group b) per oligomer or polymer molecule. The invention also relates to powder coating materials comprising such a binder and to the use of said powder coating materials for coating surfaces, especially in the form of an automotive top coat and a coil coating material.

Abstract: To provide a transparent resin which is suitable in the process of producing a coating for electronic materials, a glass having both of the scattering-preventing function and the antireflective function, an adhesive agent, a shock-absorbing material, an ultraviolet-cutting sheet for televisions, a filter for VDTs and a high refractive index primer composition as well as the process for the production of primer-coated lenses using said primer composition, is excellent in a coatability, adhesive property, storage stability, durability, shock resistance and the like, and is particularly excellent in a transparency and adhesive property after curing of the same. A transparent resin having an adhesive property characterized by comprising a cured product of the polymerizing composition which comprises at least one of diallyl phthalate, diallyl isophthalate and diallyl terephthalate, and pentaerythritol tetra (3-mercaptopropionate).

Abstract: The present invention relates to a process of preparing polycarbonate, more specifically to a process of preparing polycarbonates by solid state polymerization using microwave radiation, which comprises steps of preparing polycarbonate prepolymer having a certain range of viscosity average molecular weight; converting said polycarbonate prepolymer into crystalline particles having a certain degree of crystallinity; and producing polycarbonates by solid state polymerization of said crystalline particles by applying microwave radiation, thus resulting in production of high quality polycarbonates with high molecular weight within short time.

Abstract: A UV-curable acrylate-thiol-ene insulating coating composition for electrical conductors, a method of manufacturing a UV-curable acrylate-thiol-ene insulating coating composition for electrical conductors. The insulating coating being of about 2.5 &mgr;m to about 500 &mgr;m thickness, which cured coating has a dielectric dissipation factor (60 Hz, 24° C.) of lower than about 0.05.

Abstract: Polyester based polycarbonate (meth)acrylates prepared by the reaction of a alkylene or arylene diol polycarbonate with an anhydride or its dicarboxylic acid to form a carboxyl terminated diester, reacting the diester with a diglycidyl ether and an acrylic or methacrylic acid to form an acrylate terminate polymer which is useful for radiation cured coatings which have superior adhesion and reverse impact strength when applied to plastic substrates.

Abstract: A photopolymerizable composition which is capable of successfully ensuring both high sensitivity and excellent storage stability is provided as a radical photopolymerization-system composition which is highest in the sensitivity and very promising out of the image-forming techniques. The photopolymerizable composition comprises a polymerizable group-containing compound having a specific structure set forth below wherein X1 and X2 each independently represent a group containing a hetero atom wherein the hetero atom is in the &agr;-position or a halogen atom and a photopolymerization initiator.

Abstract: Polyester based polycarbonate (meth)acrylates prepared by the reaction of a alkylene or arylene diol polycarbonate with an anhydride or its dicarboxylic acid to form a carboxyl terminated diester, reacting the diester with a diglycidyl ether and an acrylic or methacrylic acid to form an acrylate terminate polymer which is useful for radiation cured coatings which have superior adhesion and reverse impact strength when applied to plastic substrates.

Abstract: A monomer composition which provides a plastic optical material having high refractive index and Abbe number, a low specific gravity and excellent physical properties, such as dyeing properties, heat resistance, impact resistance and the like. The composition comprises a di(meth)acrylate compound, divinylbenzene and/or divinylbiphenyl, a crosslinking-type isocyanate compound, a polythiol compound having two or more thiol groups, and a thiourethane bonding accelerating compound. The plastic optical material obtained by the reaction of the above composition with a radical polymerization initiator is used as a material for a lens.

Abstract: A coating powder comprising a macrocyclic oligomer and a ring-opening polymerization agent is applied to an article, fused, and converted to a linear polymer at a temperature of from about 160 to about 400° C. The powder has the low melt viscosity and friability of a thermoset powder but is converted at high fusing temperatures to a tough coating having the good impact resistance and good elongation of a thermoplastic powder. The oligomer is a polyester, polycarbonate, polyamide, polyimide, polyamideimide. The article may be coated electrostatically or in a fluidized bed.

Abstract: A radiation-curable, optical fiber coating composition has enhanced color stabilization and is formulated from a composition containing at least one radiation-curable oligomer or monomer. A concentration of urethane and ether linkages in the radiation-curable composition is such that a cured optical fiber coating formed from said radiation-curable composition exhibits a &Dgr;E of about 40 or less after being exposed for 96 hours to 150° C. and then for 144 hours to 180° C. Also provided is a radiation-curable optical fiber coating composition which is substantially urethane-free.

Abstract: A process for crosslinking a melt-processed polymer composition comprises the steps of (a) forming a polymerizable mixture comprising (i) at least one monoethylenically-unsaturated monomer or prepolymer and (ii) at least one monoethylenically-unsaturated, blocked mono- or polyisocyanate that is thermally stable at a selected melt processing temperature range and that is thermally deblockable at and above a deblocking temperature that is higher than the selected melt processing temperature range; (b) exposing the polymerizable mixture to transmissive energy to polymerize the mixture to form a polymer composition comprising polymerized units derived from the blocked mono- or polyisocyanate; (c) melt processing the polymer composition at the selected melt processing temperature range to form a melt-processed polymer composition; and (d) during melt processing or thereafter, increasing the temperature of the melt-processed polymer composition to the deblocking temperatures in the presence of at least one isocyana

Abstract: A method for making a plastic lens and a plastic lens made thereby. The method comprises disposing a liquid poly(meth)acrylyl monomer, or a monomer mixture, an aromatic bis(allyl carbonate)-functional monomer and a photosensitive initiator into a mold cavity and directing ultraviolet light to act on the lens forming material in the cavity to produce a lens therefrom.

Abstract: Synthesis of linear acrylic polymers and copolymers having controlled molecular weight by the photoinitiated free radical polymerization of vinyl monomers in the presence of chain transfer agents to produce polymers useful in coating compositions and the like, including printing inks.

Abstract: Acrylic, high refractive index ophthalmic device materials comprising an aryl acrylic monomer, a first stage polymerization initiator and a second stage cross-linking agent are prepared in a two-stage method. The monomers used to form the ophthalmic device materials do not contain cross-linking agents having more than one unsaturated bond. In the first stage of the method, the materials are polymerized. In the second stage, the materials are cross-linked by exposure to heat.

Abstract: A dental restorative material is disclosed, comprising an amorphous inorganic material having a refractive index in a D-line of sodium in the range of 1.470˜1.520 and having an X-ray opacity; a (meth)acrylic ester monomer not having a benzene ring in a molecule thereof; and a polymerization initiator, if desired, the dental restorative material according to the invention further comprises an amorphous inorganic material having a refractive index in a D-line of sodium equal to or less than that of the (meth)acrylic ester monomer not having a benzene ring in a molecule thereof, the dental restorative material of the invention has an X-ray opacity and translucency close to natural teeth, and has superior esthetics not using a monomer having a benzene ring which has a fear of an environmental hormone action.

Abstract: Radiation-curable compositions are disclosed which, after cure, are substantially non-yellowing. The compositions are particularly tailored for coating and bundling of optical fibers. A first preferred composition is based on a polyether-type of oligomer diluted with reactive diluents. Isocyanurate structures are included in the composition to raise Tg. A second preferred composition is based on fatty oil comprising (meth)acrylate groups and bisphenol A derivatives comprising (meth)acrylate groups. Photoinitiators can be included to increase cure speed. The formulations do not include material amounts of ingredients which tend to cause yellowing or, in theory, extended conjugation in the cured compositions.

Abstract: System for making a plastic lens. Mold members are spaced apart to define a mold cavity. Ultraviolet light is directed against at least one of the mold members to cure a composition and form a substantially clear eyeglass lens in less than one hour.

Abstract: The present invention provides a method for directly determining the concentration of a target species, such as Fries product, in a composition comprising aromatic carbonate chain units. In an exemplary embodiment, the method includes the steps of irradiating a portion of the composition with electromagnetic radiation at an excitation wavelength sufficient to cause the target species to emit a fluorescence spectrum; detecting at least a portion of the fluorescence spectrum; and determining the concentration of the target species from the fluorescence spectrum. In addition to detecting Fries product in formed polycarbonate materials, the method can also be utilized to directly determine the concentration of a target species in parallel polycarbonate reactor systems.

Abstract: Photopolymerizable compositions that include free radically active and cationically active functional groups, and methods for polymerizing such compositions, in which the onset of cationic polymerization is controllably delayed to extend the time between formation of a moldable gel and formation of a hardened solid.

Abstract: A cutable topcoat composition and apparatus useful for preparing stable data carrying devices, such as multi-layered laminates, and methods for preparing and using the composition. The composition includes a polymerizable composition and a polymeric binder. The polymerizable composition includes hard and flexible polymerizable subunits in a ratio that optimizes flexibility while retaining good adhesion and plasticizer resistance. In a preferred embodiment, a polymerization initiator is also included in the composition. Optionally, a chain transfer agent may also be added to the composition. The composition is substantially plasticizer free. The methods of using the composition include incorporating the composition into a topcoat film useful for storing the topcoat composition prior to use in preparing data-carrying devices, such as cards.

Abstract: The present invention provides crosslinked polymeric networks that are reversibly crosslinked upon exposure to light of a suitable wavelength. In one embodiment photocrosslinkable branched hydrophilic polymers containing photochromic groups are synthesized. Cinnamylidene groups and derivatives of cinnamylidene are preferably used as the photochromic agents or photocrosslinking agents.

Abstract: The invention relates to a process for the preparation of articles with a three-dimensional surface structure, in which a substrate is printed, at least one of the printing inks employed for the printing being varnish-repellent, and the printed substrate is then varnished. In accordance with the invention, the printed substrate is varnished with a radiation-curable varnish which contains no amino resin and comprisesA) from 18 to 99.9% by weight of an epoxy acrylate, a polyether acrylate or a polyester acrylate,B) from 0.1 to 5.0% by weight of a Bronsted acid or an acid anhydride,C) from 0 [sic] to 12% by weight of a photoinitiator,D) from 0 to 40% by weight of water or at least one organic solvent,E) from 0 [sic] to 10% by weight of a polyol which may be ethoxylated and/or propoxylated and has from 2 to 50 carbon atoms in the molecule, andF) from 0 [sic] to 30% by weight of other auxiliaries and additives,and the varnish coat applied is cured with high-energy radiation.

Abstract: A photoinitiator is represented by general formula (I): ##STR1## where n is an integer of 1 or greater; A and B are each a trans cyclohexane ring or a benzene ring, the benzene ring being allowed to include a fluorine atom or a methyl group as a substituent, the benzene ring adjacent to a carbonyl group being allowed to include a fluorine atom or a methyl group as a substituent; p and q are each 0 or 1, p and q are not simultaneously 0; X is an alkyl group of C.sub.1 through C.sub.3 or hydrogen atom, Y is a methyl group, ethyl group or alkoxy group of C.sub.1 through C.sub.3, and Z is a methyl group, ethyl group, alkyl-substituted phenyl group or a group represented by general formula (II), Y and Z being allowed to bonded together to form a ring: ##STR2## where A, B, n, p and q are identical with those in general formula (I).

Abstract: The liquid oligomeric compositions of this invention are made by the Michael addition reaction of acetoacetate functional donor compounds with multifunctional acrylate receptor compounds where the equivalent ratios of multifunctional acrylate to acetoacetate vary from .gtoreq.1:1 to .gtoreq.13.2:1 depending on the functionality of both multifunctional acrylate and acetoacetate. Unuseable gelled or solid oligomer products occur below the claimed ranges. The liquid oligomers of this invention are further crosslinked to make coatings, laminates and adhesives.

Abstract: A curable topcoat composition and apparatus useful for preparing stable data carrying devices, such as multi-layered laminates, and methods for preparing and using the composition. The composition includes a polymerizable composition and a polymeric binder. The polymerizable composition includes hard and flexible polymerizable subunits in a ratio that optimizes flexibility while retaining good adhesion and plasticizer resistance. In a preferred embodiment, a polymerization initiator is also included in the composition. Optionally, a chain transfer agent may also be added to the composition. The composition is substantially plasticizer free. The methods of using the composition include incorporating the composition into a topcoat film useful for storing the topcoat composition prior to use in preparing data carrying devices, such as cards.

Abstract: The present invention provides crosslinked polymeric networks that are reversibly crosslinked upon exposure to light of a suitable wavelength. In one embodiment photocrosslinkable branched hydrophilic polymers containing photochromic groups are synthesized. Cinnamylidene groups and derivatives of cinnamylidene are preferably used as the photochromic agents or photocrosslinking agents.

Abstract: The ultraviolet-curable, resin-forming composition which comprises a polycarbonic acid ester such as diethylene glycol bis(allyl carbonate), a polythiol such as pentaerythritol tetrakis(3-mercaptopropionate) and an ultraviolet curing agent. The resin-forming composition can be photopolymerized in an atmospheric condition, and the thus produced resin has an elongated durability as well as excellent properties with regard to a transparency, heat resistance, adhesion property, resistance to shock, dyeing property and others.

Abstract: In an additive process for producing printed wiring boards, by using a developer comprising a chlorine-free organic solvent and an alkaline aqueous solution and as a resist material a copolymer of methacrylic acid and methyl methacrylate or the like, the production steps are simplified even if a substrate having a large area is used, and abolishment of chlorine-containing organic solvent as a developer becomes possible.

Abstract: This invention relates to a liquid crystal display apparatus formed by sealing a liquid crystal between two substrates having electrodes and an alignment film with a seal material, the production process comprising the steps of attaching two substrates in a vacuum, compressing under atmospheric pressure to provide a uniform cell gap, a temporary hardening process of the seal material by ultraviolet ray irradiation and a main hardening process of the seal material by heating, wherein a radically polymerizable curing resin is used in the liquid crystal seal material. The method provides a liquid crystal display panel having a uniform cell gap, without dislocation of the alighnment between substrates, or discharge of uncured component of a seal material to the liquid crystal, capable of having a seal material firmly attached to the substrates even at panel corner portions, and having an excellent straightness and moisture resistance of the seal material.

Abstract: A homopolymer of acrylic acid or methacrylic acid derivatives having the general formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or methyl group; R.sup.2 is a residue of a compound having physiological activity; X is a residue of a compound having a hydroxyl group, amino group or carboxyl group at both ends in its chemical structure after bonding between such compound and acrylic or methacrylic acid, and between such compound and the physiologically active compound; and the homopolymer has a number-average molecular weight ranging from 20,000 to 200,000; and a process for the preparation thereof by a mechanochemical polymerization reaction; as well as a polymeric drug and prodrug comprising the homopolymer.

Abstract: The claimed invention is an uncured thermosetting composition which is capable of curing upon exposure to actinic radiation, said composition comprising an acetal diacrylate of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are individually hydrogen, C.sub.1-6 alkyl, aryl, or substituted aryl; R.sub.3 and R.sub.4 are individually C.sub.1-6 alkyl, aryl, substituted alkyl, or aryl alkyl; and R.sub.5 and R.sub.6 are individually hydrogen or C.sub.1-6 alkyl; and a free radical curing agent.

Abstract: A homopolymer of acrylic acid or methacrylic acid derivatives having the general formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or methyl group; R.sup.2 is a residue of a compound having physiological activity; X is a residue of a compound having a hydroxyl group, amino group or carboxyl group at both ends in its chemical structure after bonding between such compound and acrylic or methacrylic acid, and between such compound and the physiologically active compound; and the homopolymer has a number-average molecular weight ranging from 20,000 to 200,000; and a process for the preparation thereof by a mechanochemical polymerization reaction; as well as a polymeric drug and prodrug comprising the homopolymer.

Abstract: Improved photopolymerization initiator systems are comprised of a spectral sensitizer that sensitizes in the ultraviolet or visible regions of the spectrum and an N-aryl, O-aryl or S-aryl polycarboxylic acid co-initiator. The improved initiator systems are incorporated in photo-polymerizable compositions containing one or more addition-polymerizable ethylenically-unsaturated compounds to form compositions suitable for the preparation of radiation-sensitive layers in lithographic printing plates adapted to be imagewise-exposed with ultraviolet- or visible-light-emitting lasers such as argon-ion lasers and frequency doubled Nd:YAG lasers. Such plates are able to effectively meet the dual requirements of very high photospeed and very good shelf-life required in computer-to-plate systems.