Abstract: An improved in-situ polymerization method is provided for easily producing a good slurry of strong, dense, water-resistant and anti-hygroscopic microcapsules made of an amino resin of either of melamine-formaldehyde series or the ureaformaldehyde series, in a high concentration of microcapsules, and a low viscosity.

Abstract: A curable resin composition is disclosed which comprises (A) a polymer having a (meth)acryloyl group in a side chain, (B) an unsaturated alkyd which is formed by the esterification of a polyvalent alcohol component and an .alpha.-.beta.unsaturated polybasic acid or an anhydride thereof with or without a polybasic acid, the polyvalent alcohol component comprising a phenol-modified epoxy resin which is obtained by the reaction of an epoxy group of an epoxy resin and a phenolic hydroxyl group of a phenol, or the reaction product of a polyvalent phenol compound and a monoepoxide, (C) a polymerizable monomer, and (D) a curing agent. It is suitable for underwater linings, putties, sealing materials, and the like.

Abstract: This invention relates to a curable resinous composition prepared by reacting 1 mol of (a) an unsaturated polycycloacetal, 0.1 to 3 mols of (b) an ester of polyhydric alcohol/unsaturated monocarboxylic acid, having an alcoholic hydroxyl group and a polymerizable unsaturated bond selected from the group of acryl and methacryl groups in the same molecule, and 0.1 to 2.9 mols (per hydroxyl group in component b) of (c) a polyhydroxy compound.

Abstract: This invention relates to a curable resinous composition which comprises a combination of (I) a curable resinous compound prepared by reacting 1 mol of (a) an unsaturated polycycloacetal, 0.1 to 3 mols of (b) an ester of a polyhydric alcohol/unsaturated monocarboxylic acid, having an alcoholic hydroxyl group and a polymerizable unsaturated bond in the same molecule, and 0 to 2.9 mols of (c) a polyhydroxy compound such as polyols, polyethers and polyesters, with (II) an unsaturated polyester.

Abstract: This invention relates to a binder comprising (a) a polyamine-epichlorhydrine resin obtained by reacting epichlorhydrine with a polyamine resin having at least 2 amino groups per molecule; and (b) an amphoteric high molecular compound having at least 2 cation groups and at least 2 anion groups per molecule.

Abstract: This invention relates to a polymerizable cycloacetal resinous composition, characterized by reacting 1 equivalent of diallylidenepentaerythritol (I) with 0.8 - 2.0 equivalents of polyhydric alcohol-unsaturated monocarboxylic acid ester mono-ol (II) having both a hydroxyl group and a polymerizable or copolymerizable unsaturated bond in the same molecule, with or without a solvent, in the presence of a polymerization inhibitor and addition reaction catalyst.