Abstract: A curable epoxy resin composition containing an epoxy resin and, as a curing agent, 3,9-bis(2-hydrazidoethyl)-2,4,8,10-tetraoxaspiro-[5,5]-undecane, as well as the cured resins produced from such composition, the curable resin being useful for paints, adhesives, and molded articles.

Abstract: Hard and strong epoxy resin products of high impact resistance are made from a di-epoxy compound, a smaller than equivalent proportion of chain extender which is preferably a bis-phenol, and about 5% (based on the amount of the di-epoxy compound) of a functionally terminated elastomer which is preferably a phenol terminated liquid copolymer of butadiene and acrylonitrile, together with a curing agent active at elevated temperatures.

Abstract: The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.

Abstract: A method and product for compensating ambient temperatures and altering the working time and curing time of a thermosetting resin-hardener compound which is accomplished by selecting and adding a diluent to the resin or hardener blend according to the ambient temperature so that when the resin blend and the hardener blend are intermixed, a heat change is produced which counteracts the effect of the ambient temperature.

Abstract: A flame-resistant resin composition consisting essentially of 100 parts by weight of polytetramethylene terephthalate, 3 to 40 parts by weight of a flame retardant represented by the general formula, ##SPC1##Wherein n + m is a number of 0 to 10; X is a bromine or chlorine atom; and i, j, k and l are individually an integer of 1 to 4, and antimony trioxide, the weight ratio of said flame retardant to said antimony trioxide being in the range of from 0.25 to 6. This composition is excellent in mechanical properties, thermal properties and moldability, and causes no spread of fire to other materials even when dripped at the time of combustion.

Abstract: A curable composition comprising (a) a resin containing free hydroxyl groups which is obtained by the reaction of a compound of formula R'(CH.sub. 2 X).sub.a, wherein R' is a divalent or trivalent aromatic hydrocarbon or a di(aromatic hydrocarbon) ether, X is an alkoxy group of 1 to 6 carbon atoms or is chlorine, bromine or iodine and a is 2 or 3, with a phenolic compound, (b) a cycloaliphatic epoxy compound containing at least two 1,2 - epoxide groups per molecule and (c) an amino compound selected from the group consisting of imidazoles, N-substituted imidazoles, triethylene diamine, and benzimidazoles.

Abstract: The invention relates to heat-curable pulverulent coating agents, frequently also called power lacquers, which are suitable for applying a coherent coating which possesses excellent properties after heat-curing.

Abstract: An epoxy resin composition having a remarkably improved storage stability and an excellent hardening characteristic when heated, which comprises an epoxy resin and an aromatic amino carboxylic acid or a derivative thereof as a hardener for the epoxy resin. This composition can be molded by injection molding, heretofore being deemed inapplicable to epoxy resin compositions, whereby the molded articled of epoxy resin can be produced with a high molding efficiency.

Abstract: An acrylic fiber having excellent antistatic properties is obtained by mixing a polymer (A) consisting mainly of acrylonitrile with a copolymer (B) consisting mainly of a polyetherpolyester block copolymer consisting of a polyester and compound represented by the general formula (1): ##EQU1## (wherein each of m and n is O or a positive integer, wherein 25 .ltoreq. m + n .ltoreq. 1000, and m .gtoreq. 10).

Abstract: Acrylate elastomer compositions having improved aging resistance due to addition of epoxy-containing compounds.

Abstract: Water-dispersible salt-containing containing quaternary ammonium salt groups are prepared by reacting a polyglycidyl ether of a polyphenol and an amine acid salt. When dispersed or dissolved in water, the quaternary ammonium salt-contaning resins can be applied to a wide variety of different substrates by electrodeposition, and will deposit on the cathode to provide coatings of unique properties.

Abstract: Thermoplastic molding compositions containing a small amount of a cross-linked polyester as nucleating agent can be processed into high quality shaped articles having a high degree of crystallization.

Abstract: This patent discloses and claims the reaction of oxirane-containing compounds with primary cyclic imide-containing compounds, at temperatures of from about 0.degree. to 225.degree.C, in the presence of active chromium III tricarboxylate salts which have unoccupied coordination sites.

Abstract: Formaldehyde is reacted with a polythiol to give novel methylol derivatives of the polythiol. The methylol derivatives are useful in curing polyepoxides.

Abstract: Stable diazonium catalyst solutions are provided in which the catalyst is dissolved in an organic sulfone. The catalyst solutions have greatly extended shelf-life while at the same time retain the ability to rapidly cure epoxy resins upon exposure to an energy source.Polymerizable compositions of the two-package type, comprising polymerizable epoxy materials and such catalyst solutions are also provided.

Abstract: A flexible elastomer resin having an improved impact resistance and strength is produced by reacting an acid anhydride group functional polymer, which is prepared by reacting a hydroxyl group functional polymer having a number average molecular weight of 400 to 10,000 and containing at least two hydroxyl groups at the end or the side chain with a tricarboxylic acid anhydride monohalide, with at least one nitrogen compound having polyfunctional active hydrogens and at least one epoxy resin having at least one epoxy group.

Abstract: A polyoxazolidone composition is prepared by heating a reaction mixture comprised of a cyclic nitrile compound, an epoxide, a metal halide catalyst, and, optionally, a polyhydroxyl, polyamine or polythiol containing compound. The reaction mixture may be stable at normal handling and storage temperatures and may be in the form of a dry powder or a liquid.

Abstract: A heat-curable adhesive lacquer is provided which comprises:(a) a polyurethane-ester-imide having (i) terminal isocyanate groups blocked by a monohydric phenol, and (ii) free hydroxyl groups and (b) an essentially linear epoxide or polyester resin having secondary hydroxyl groups and a molecular weight of above 30,000, the lacquer achieving, on drying, a B-state which is stable on storage such that the lacquer softens again when further heat is supplied to give a cross-linked resin in the C-state, which is heat stable.

Abstract: Solid phase polycondensation of thermoplastic polyester melt precondensate is effected at a temperature from 50.degree. to 5.degree.C below the melting point of the precondensate, at a vacuum below 1 torr and in contact with a streaming inert gas.

Abstract: Improved stabilized acrylate resins compositions comprise the acrylate resin and a precise amount of a stabilizing acid having a pK.sub.a less than 2.5 and having an anion having a nucleophilicity of less than 2.5. An improved method of preparing stabilized acrylate resins comprises reacting the acrylate acid, epoxide, nucleophilic catalyst and stabilizing acid simultaneously to give the stabilized acrylate resin.