Polychrome Corporation

William Rowe

Eugene Golda

Ajay Shah

Alan Leonard Wilkes

Thomas J Dooley

Nils Eklund

A process for preparing polyvinyl phosphonic acid by the steps of polymerizing bis(2-chloroethyl) vinyl phosphonate in the presence of a free radical initiator or catalyst, such as dicumyl peroxide. The resulting poly bis(2-chloroethyl) vinyl phosphonate is then subjected to acid hydrolysis to obtain high purity polyvinyl phosphonic acid having measurable and controllable molecular weight distribution.

Method for the preparation of polyvinyl phosphonic acid

Radiation sensitive compositions comprising acrylic or methacrylic acid esters with decreased oxygen inhibition attained by use of minor amounts of N,N'-diorgano dicarboxamide additives. The acrylated ester compositions are suitable for ultraviolet curable coatings.

N,N'-diorgano dicarboxamides as oxygen inhibitors in radiation sensitive

The invention features a new series of triazine compounds which are characterized by their ability to generate free radicals upon irradiation in a desired optical region, such that they are useful in the fabrication of lithographic plates having improved exposure speed, development, print-out, and contrast characteristics.

Photosensitive naphthoquinone diazide sulfonyl ester compounds for the

Quinone diazide derivatives of adamantane, and especially quinone diazide derivatives of 1,3-dialkyl-5,7-bis(hydroyphenol) adamantanes, have been found to provide unique properties when coated on metal substrate in the preparation of both positive and negative working lithographic plates. The improved lithographic plates are characterized by enhanced speed, coating oleophilicity, alkali resistance, developer latitude and development speed.

Photosensitive compounds and lithographic composition or plate therewith

An improved method for the preparation of chromophore-substituted vinyl-halomethyl-s-triazines especially 2-(p-methoxystyryl)-4,6-bis-(trichloromethyl)-s-triazine. In the known preparation of these compounds, a two step procedure is utilized wherein an intermediate reaction product has to be isolated. This step of separating the intermediate is eliminated in the present process by dissolving the crude reaction product obtained in the first step in toluene, removing excess hydrogen chloride gas and catalysts by purging the reaction product solution with an inert gas, and then reacting p-anisaldehyde with the toluene solution of the reaction product mixture using piperidinium acetate catalyst to obtain 2-(p-methoxystyryl)-4,6-bis-(trichloromethyl)-s-triazine. As a further improvement of the art the Knoevenagel-type condensation is run until no further water is evolved. At this point the product formed is isolated by filtration and a like amount of catalyst as a second charge is added. Again, the reaction is carried out until no further water is evolved and further product is isolated by filtration.

Process for preparing chromophore-substituted

An O-epoxyalklyated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid can be combined with an aqueous alkali- and radiation sensitive, negative acting substance which when coated on a substrate forms a radiation sensitive negative working element.

Method for making a negative working lithographic printing plate

Photopolymerizable compositions comprised of (I) novel polymers which are substantially comprised of the reaction products of (A) organic polyisocyanates and (B) organic compounds containing at least about two active hydrogen atoms per molecule, said polymers having been end-capped by reaction with (C) organic compounds containing exactly one active hydrogen atoms and said end-capped polymers having viscosities of from about 5 to about 70 stokes when measured as a 30% solution in a mixture of approximately equal parts of xylol, methyl ethyl ketone and ethylene glycol monomethyl ether, at 25.degree. C., (II) addition polymerization initiators activatable by actinic light, (III) addition polymerizable ethylenically unsaturated components capable of forming polymers by photoinitiated polymerization in the presence of the initiators, and (IV) a natural or synthetic rubber. The unsaturated components may be integral parts of the polymer's structure, or they may be separate compounds admixed with the polymers and initiators. Relief images, especially useful for printing, are prepared by exposure of a mass of the composition to a light source through, e.g., a transparency which has relatively opaque and relatively translucent areas, and subsequent development of the image by application of a developer composition.

Novel radiation-sensitive articles

A pressure sensitive adhesive formed by exposure of a mixture comprising (I) a liquid, substantially water-insoluble monomeric composition, containing zero percent free isocyanate groups, which comprises the reaction product of (i) one equivalent of an isocyanate containing intermediate which is, itself, the reaction product of about one equivalent of an organic, monomeric compound containing more than one active hydrogen with two equivalents of an organic polyisocyanate, and (ii) one equivalent of a monomeric olefinically unsaturated compound containing exactly one active group; (II) a tackifier and (III) a polymerization inhibitor to a source of ultraviolet or electron beam radiation whereby the composition is rendered tacky.

Radiation curable pressure sensitive adhesive

Improved compositions comprising solvent-soluble, negative-acting or positive-acting light-sensitive diazonium compounds and solvent-soluble unsaturated monomers which are the products of about two equivalents of an organic diisocyanate with about one equivalent of an active hydrogen-containing organic compound, e.g., an alcohol or amine, preferably a polyol, which products are subsequently reacted with an unsaturated compound which contains an active-hydrogen, preferably in a hydroxyl group, available to react with the remaining isocyanate groups. The compositions can be coated onto suitable base sheet materials to form presensitized lithographic printing plates, proofs for multi-color printing, visual aids, printed circuits and the like.

Diazo-unsaturated monomer light sensitive compositions

Curable polymeric composition comprising natural or synthetic rubbers

Photopolymerizable compositions comprised of (I) novel polymers which are substantially comprised of the reaction products of (A) organic polyisocyanates and (B) organic compounds containing at least about two active hydrogen atoms per molecule, said polymers having been end-capped by reaction with (C) organic compounds containing at least one active hydrogen atom and said end-capped polymers having viscosities of from about 5 to about 70 stokes when measured as a 30% solution in a mixture of approximately equal parts of xylol, methyl ethyl ketone and ethylene glycol monomethyl ether, at 25.degree. C., (II) addition polymerization initiators activatable by actinic light, and (III) addition polymerizable ethylenically unsaturated components capable of forming polymers by photoinitiated polymerization in the presence of the initiators. The unsaturated components may be integral parts of the polymer's structure, or they may be separate compounds admixed with the polymers and initiators. Relief images, especially useful for printing, are prepared by exposure of a mass of the composition to a light source through, e.g., a transparency which has relatively opaque and relatively translucent areas, and subsequent development of the image by application of a developer composition.

Polymers and process for their preparation

Novel compounds which are the products of monomeric organic reactants containing one or more active hydrogen atoms as determined by the Zerewitinoff method, e.g., a polyol, and organic polyisocyanates, e.g., diisocyanates, in such amounts as to provide about two isocyanate groups for each active hydrogen-containing group thereby forming isocyanate terminated intermediates which are reacted with monomeric organic reactants having at least one active hydrogen-containing group and preferably also an unsaturated group, preferably in a terminal position. One of the monomeric organic active hydrogen-containing reactants must have only one active hydrogen. The novel compounds of this invention which have unsaturated groups are useful as monomers especially in systems utilizing free radical generating addition polymerization initiators which are activatable by actinic light and may be used in the preparation of finishes for woods and metals or in the formulation of inks, both of which may be solvent-free and are curable by exposure to actinic light. Those of the compositions of this invention which do not contain unsaturation may be used as plasticizers in the aforementioned formulations.

Room-temperature-radiation-curable polyurethane

A developer composition for photosensitive coatings on substrates, particularly lithographic printing plates sensitized with substantially water-insoluble diazonium compounds, which is comprised of an aqueous solution of a substantially water-soluble organo-lithium salt, e.g., lithium naphthenate, lithium benzoate, lithium ricinoleate, etc. The novel developers quickly remove unexposed areas of the plate and yet do not detrimentally dissolve the exposed areas of the plate.

Growing community of inventors

Westfield, NJ, United States of America

William Rowe