Abstract: An image-receiving sheet for thermal transfer printing comprising a substrate and an image-receiving layer disposed on said substrate, characterized in that said image-receiving layer contains thermoplastic resin fine particle aggregates. And an image-receiving sheet comprising a substrate, an intermediate layer disposed on said substrate, and an image-receiving layer disposed on said intermediate layer, characterized in that at least said intermediate layer contains thermoplastic resin fine particle aggregates.

Abstract: Disclosed is an acceptor coated sheet for pressure-sensitive copying system comprising a base sheet and an acceptor layer disposed thereon, said acceptor layer being formed from an acceptor coating composition comprising(a) at least one immobilizing agent selected from the group consisting of the sulfates, nitrates, acetates and formates of zinc, aluminum and magnesium,(b) a latex of copolymer containing an unsaturated carboxylic acid as a monomer component and, if necessary, a water-soluble binder,(c) an organic acceptor, and(d) at least one pigment selected from the group consisting of zinc oxide, magnesium oxide, titanium oxide, aluminum hydroxide, calcium carbonate, calcium sulfate and kaolin.

Abstract: Disclosed is a pressure sensitive manifold paper prepared by coating a substrate with a coating composition containing microcapsules of polyurethane resin or polyurea resin wall film and drying the resulting coating, the pressure sensitive manifold paper being characterized in that a latex of copolymer of comonomers comprising about 10 to about 50% by weight of styrene, about 15 to about 55% by weight of butadiene, about 10 to about 40% by weight of methyl methacrylate and up to about 15% by weight of acrylonitrile is incorporated in the coating composition in an amount of about 5 to about 30% by weight (calculated as solids) based on the microcapsules (calculated as solids).The pressure sensitive manifold paper has an adequate balance between the color forming ability and susceptibility to color smudges due to contact or friction.

Abstract: A hydrophobic liquid including a polyvalent isocyanate therein is dispersed in an aqueous medium in the presence of a specific polymer dissolved therein to form an emulsion system for producing microcapsules. The specific polymer dissolved in the aqueous medium is a homopolymer or copolymer including monomer units represented by the general formula: ##STR1## wherein R is hydrogen or alkyl, M is ammonium, sodium, potassium, lithium or hydrogen and Q is further represented by ##STR2## wherein Y is methylene, ethylene or polymethylene having 3 to 10 carbon atoms, which methylene, ethylene or polymethylene may be substituted by at least one alkyl.

Abstract: The method of making microcapsules comprises performing polycondensation for producing aminoaldehyde resin in an aqueous dispersion including particles of hydrophobic core material in the presence of cation-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said particles of hydrophobic core material.

Abstract: The method of making microcapsules comprises performing polycondensation of an aminoaldehyde resin prepolymer in an aqueous dispersion including particles of hydrophobic core material in the presence of anion-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said particles of hydrophobic core material.

Abstract: A hydrophobic organic solvent containing a compound of the formula ##STR1## is dispersed and emulsified in an aqueous medium containing a sulfinic acid of the formulaR.sub.5 --SO.sub.2 H (I)and serving as an aqueous medium for preparing microcapsules to react the compounds of the formulae (I) and (II) and synthesize a diarylmethane derivative of the formula ##STR2## while encapsulating oily droplets of the resulting hydrophobic organic solvent solution of the diarylmethane derivative. Colorless chromogenic materials can be synthesized and encapsulated at the same time by this process.

Abstract: In the method of making microcapsules polycondensation for forming an anion-modified aminoaldehyde resin is performed in the presence of at least one anionic colloid material in an aqueous dispersion including hydrophobic material particles dispersed therein to deposit said anion-modified aminoaldehyde resin on said hydrophobic material particles to form microcapsules encapsulating hydrophobic capsule core material therein.

Abstract: The present invention relates to a process for removing an aldehyde from dispersions containing the aldehyde by introducing a gas into the dispersion.