Abstract: Resinous substance suitable for use as film-forming component in anti-corrosive and can-coating paint and varnish compositions, which consists of the product obtained by reacting a normally solid polyepoxide with cashew nut oil in such amounts as to ensure equivalence between the phenolic hydroxyl groups of the cashew nut oil and the epoxy groups of the polyepoxide, and modifying the resulting reaction product with fatty acids having at least 8 carbon atoms per molecule, using a molar ratio of from 0.1:1 to 0.8:1 between said fatty acids and the cashew nut oil used in the reaction with the polyepoxide.

Abstract: A composition hardenable by means of ultra-violet radiations, which comprises (a) an unsaturated epoxy resin ester obtained by reacting an epoxy or epoxy novolak resin with an unsaturated monocarboxylic fatty acid with 18 carbon atoms per molecule and with acrylic and/or methacrylic acid, the fatty acid being used in an amount of 20-80 moles for each 100 moles of the sum of the acids, (b) a mono- or poly-functional unsaturated monomer and (c) a photo-sensitive substance. The composition comprises 3-97 parts by weight of component (a) and 1.2-3.5 parts by weight of component (c) for each 100 parts by weight of the sum of components (a) and (b).

Abstract: The stability under storage of unsaturated polyester resin compositions is improved by adding from 20 to 300 ppm, with respect to the unsaturated polyester resin, of one or more stabilizers chosen from halides of alkaline earth metals and halides of metals of Group VIII of the Periodic Table of the Elements.

Abstract: A composition hardenable by means of organic peroxides, comprising an unsaturated epoxy resin and an ethylenically unsaturated monomer copolymerizable with the latter, said monomer being present in the composition in an amount of from 0.4 to 2 parts by weight for each part by weight of said resin, and said resin being the reaction product of an unsaturated monocarboxylic acid or a monoester of an unsaturated bicarboxylic acid with the epoxidation product of epichlorohydrin and a novolak phenolic resin of the structural formula: ##STR1## wherein n has an average value of from 0.1 to 0.7.

Abstract: A hardenable composition comprising an unsaturated epoxy ester resin and an ethylenically unsaturated monomer copolymerizable with the latter, said monomer being present in the composition in an amount of from 0.4 to 2 parts by weight for each part by weight of said resin, and said resin being the reaction product of an unsaturated monocarboxylic acid or a monoester of an unsaturated bicarboxylic acid with the epoxidation product of epichlorohydrin and a novolak phenolic resin of the structural formula: ##STR1## wherein R is an alkyl radical containing from 1 to 10 carbon atoms, the methylene bridges being bonded to the central phenol ring in the ortho- positions in relation to the hydroxyl group, and to the other phenol rings in the ortho- or para- positions in relation to the hydroxyl groups.

Abstract: Unsaturated polyester resin compositions comprising:(a) an unsaturated polyester resin,(b) from 5 to 15 parts by weight for each 100 parts by weight of polyester resin (a), of vinyl chloride polymer, and(c) from 10 to 20 parts by weight for each 100 parts by weight of polyester resin (a), of an epoxy Novolak resin having an epoxy function higher than 2, or of a mixture of the latter with a liquid epoxy resin in such amount that the average epoxy function of the mixture be higher than 2. These compositions hardenable by means of peroxides have low shrinkage values on hardening and yield hardened products having high resistance to bending and to heat.

Abstract: Molding composition comprising from 10 to 50 wt.% of the polycondensation product of an alkylene glycol or a mixture of the latter with up to 20 wt.% of 2,2'-bis(4-hydroxycyclohexyl)propane or a halogenated derivative thereof, with an ethylenically unsaturated dicarboxylic acid and a saturated dicaboxylic acid, having a melting point of at least 60.degree. C, an acid value of less than 50 and a Gardner viscosity from Y to Z.sub.3, from 0.2 to 2 wt.% of organic peroxide with a decomposition temperature above 70.degree. C, and an inert filler. The resulting molded articles are particularly useful in the electrical and electronic fields.

Abstract: Molding composition comprising from 10 to 50 wt.% of the polycondensation product of 2,2'-bis(4-hydroxycyclohexyl) propane or a halogenated derivative thereof, and maleic or fumaric acid, having a melting point above 70.degree. C, an acid value of less than 50 and a Gardener viscosity from Y to Z.sub.3, from 0.2 to 2 wt.% of an organic peroxide which decomposes at a temperature above 70.degree. C, and an inert filler.The resulting molded articles are particularly useful in the electrical and electronic fields.

Abstract: Vinylidene chloride polymers and copolymers are prepared by contacting vinylidene chloride monomer alone or in mixture with other ethylenically unsaturated monomers with a catalytic system consisting of an organic per-compound, an organic compound of zirconium or cobalt and an acid compound according to the definition of Bronsted and Lowry in an organic solvent medium.High yields and polymerization speeds are achieved at low polymerization temperatures (10.degree.-35.degree. C).

Abstract: An insaturated polyester A of the formula: ##EQU1## wherein n is an integer from 0 to 15, R.sub.11 ##EQU2## is the acid radical of an unsaturated monocarboxylic acid or of a monoester of an unsaturated bicarboxylic acid, R.sub.13 is H or CH.sub.3, and R.sub.10 is an organic radical of a glycol HO-R.sub.10 -OH representated by the formulae: ##SPC1##Wherein:R.sub.1 is chlorine or bromine,R.sub.2 , r.sub.3, r.sub.4, r.sub.5 , r.sub.6, r.sub.7, r.sub.8 are hydrogen or bromine or chlorine,X is a NH radical or oxygen,R.sub.9 is an alkyl or oxyalkyl radical containing 2 to 8 carbon atoms.The solutions in an unsaturated solvent of said polyester A or of mixtures of polyester A with other unsaturated polyesters can harden, giving products of improved mechanical and self-extinguishing properties.