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 multifunctional photoinitiator is obtainable as the reaction product of a multifunctional core material containing two or more reactive groups and a photoinitiator or a derivative thereof. The photoinitiator or its derivative has a reactive group capable of reacting with the reactive groups of the multifunctional core.

Abstract: A hot melt inkjet vehicle is obtained by reacting a mono- or diisocyanate with functional amide materials. The functional amides are the reaction products of hydroxy functional primary and/or secondary amines and/or diprimary diamines together with a monofuntional carboxylic acid and/or hydroxy carboxylic acid and/or a difunctional carboxylic acid.

Abstract: A process and apparatus for forming an image on a moving substrate involves ink jet printing a radiation-curable ink onto the substrate with a print head. The image is cured by exposure to a radiation source. The time between printing and curing is substantially the same for all portions of the substrate.

Abstract: A UV-curable ink jet composition comprises a polyfunctional alkoxylated or polyalkoxylated acrylate monomer (80% to 95% by weight), a photoinitiator (e.g. from 1 to 15% by weight) and preferably a colorant (e.g. 1% to 10% by weight).

Abstract: A powder toner composition includes a particulate synthetic thermoplastic material, refractory metal oxides, and a powder lubricant. The particulate synthetic thermoplastic material is surface coated with a blend of the refractory metal oxides and the powder lubricant. At least one of the refractory metal oxides is surface-treated. The powder compositions exhibit fluid properties when subjected to mechanical agitation or aeration, and settle as compacted solids when agitation/aeration ceases. The compositions exhibit behavior substantially free of slugging, channeling and jetting when aerated.

Abstract: The presently claimed process for the production of a solid pigment/resin dispersion comprises the steps of mixing together a particulate pigment, a solid resin carrier, a water-immiscible organic solvent in which the carrier is at least partially soluble, water, and, optionally, a water miscible solvent until the mixture separates into an aqueous phase and a coherent phase comprising resin, pigment and organic solvent; separating water from the coherent phase; and continuing to mix the coherent phase while removing the organic solvent under the action of heat and/or reduced pressure until a dry particulate material comprising a pigment and resin is formed.

Abstract: A photopolymerizable material is provided that is suitable for use in the production of coatings or resists on printed circuit boards, for example The material is an ethylenically unsaturated polymerizable reaction product of a polyepoxide and a mixture of (i) a major proportion of an ethylenically unsaturated carboxylic acid and (ii) a minor. proportion of a saturated aliphatic or aromatic carboxylic acid, the reaction product being further modified by reaction with a dicarboxylic acid or anhydride thereof.

Abstract: A process for the formation of a patterned resist of a photocurable material on a circuit board, the uncured portion of which is water soluble. The process includes the steps of forming a layer of an aqueous emulsion of a photocurable material upon the circuit board, drying the layer to a substantially dry and non-tacky state, imagewise exposing the layer to radiation to cure portions of the layer exposed to the radiation, and removing unexposed portions of the layer by washing with water. In a preferred embodiment, the photocurable material is an organic solvent solution of an epoxy acrylate derived from an epoxy novolac resin which has been carboxylated to render it alkali-developable.

Abstract: A two-part system for the preparation of a thermally curable coating composition, in which one-pack contains a thermally curable material and the other contains a curing system potentially reactive therewith, at least one of the packs having water as the principal liquid carrier.

Abstract: A process for the formation of a patterned resist of a photocurable material on a circuit board, the uncured portion of which is water soluble. The process includes the steps of forming a layer of an aqueous emulsion of a photocurable material upon the circuit board, drying the layer to a substantially dry and non-tacky state, imagewise exposing the layer to radiation to cure (harden) portions of the layer exposed to the radiation, and removing unexposed (uncured) portions of the layer by washing with water. In a preferred embodiment, the photocurable material is an organic solvent solution of an epoxy acrylate derived from an epoxy novolac resin which has been carboxylated to render it alkali-developable.

Abstract: A process for the formation of a patterned resist image upon a substrate comprises the steps of: (i) mechanically applying a layer of a suspension of a powdered solid photocurable material in a liquid carrier to the substrate; (ii) drying the resultant layer by evaporation of the liquid carrier and reflowing the powder, under the action of heat, to give a coherent film; (iii) imagewise exposing the dried film to radiation through a patterned mask whereby portions of the film exposed to radiation are cured; and (iv) subsequently developing the exposed film by removing unexposed portions thereof with an appropriate solvent.

Abstract: A film-forming polyester derived from a monohydric alcohol component having one or more long chain alcohols, the alcohol forming from 5 to 60% by weight of the components from which the polyester is derived. Coating compositions including the polyesters are particularly suitable for applying to cans before the cans are subjected to a spin-necking operation.

Abstract: Polyamides containing free amino groups and suitable for use as curing agents for polyepoxy compounds are derived from (a) a polybasic acid component comprising polymeric fatty acid together with from 10 to 90 mole %, based on the total acid component, of one or more aromatic dicarboxylic acids containing two carboxylic acid groups and one benzene ring, each carboxylic acid group being directly linked to a benzene ring, and (b) a polyamine component containing at least 50 mole % of one or more aliphatic polyamines containing at least three amino groups per molecule.Cured resinous composition may be prepared by reacting the polyamides with polyepoxy compounds and curable composition contain the polyamides together with polyepoxy compounds.

Abstract: A coating composition comprises the following components dissolved in an organic solvent therefor:(I) an addition copolymer derived from ethylenically unsaturated monomers and containing (a) from 0.8 to 8.0% by weight, based on the total weight of the polymer, of free carboxyl groups, and, optionally, (b) tertiary amino groups;(II) one or more polyepoxide compounds present in an amount to provide from 0.2 to 2 epoxy groups for each carboxy group in the addition copolymer;(III) an aluminum, titanium or zirconium alkoxide or complex thereof with a chelating agent therefor, present in an amount such that the amount of metal is from 0.05 to 2.0% by weight, based on the weight of the addition copolymer; and(IV) optionally, a tertiary amino compound; provided that component (IV) is present when the addition copolymer (I) does not contain tertiary amino groups and that the total amount of tertiary amino groups present in the composition provides from 0.