Abstract: Compounds active as accelerators for curable epoxy and polyurethane systems, those compounds having been prepared by means of a transamination reaction by reacting (a) a substituted phenolic compound (Mannich base) having at least one substituent of formula R1(R2)N—CH(R3)—  (A), wherein R1 and R2 are each independently of the other linear or branched C1-4alkyl and R3 is hydrogen, methyl, ethyl or phenyl, with (b) a compound of formula R4(R5)N—CnH2n—(NH—CnH2n)q—NH2  (B), wherein R4 and R5 are each independently of the other C1-C6alkyl or together form a radical of formula —(CH2)5— or —(CH2)2—O—(CH2)2—, n is an integer from 2 to 5 and q is zero, 1, 2 or 3, and the compound obtained or the compounds present in the mixture obtained has/have on average, per molecule, at least one substituent of formula (R4)(R5)N—CnH2n—(NH—CnH2n)q—NH—CH(R3)—, and the use of those compounds as acceler

Abstract: A process for the production of glycidyl ether of an aliphatic, cycloaliphatic or araliphatic primary or secondary alcohol, comprising:A) reacting epichlorohydrin with a molar excess of the alcohol in the presence of a Lewis acid catalyst; optionallyB) dehydrochlorinating the product so obtained; andC) reacting the product from step A) or B) with a molar excess of epichlorohydrin in the presence of alkali and a phase transfer catalyst, and then isolating the glycidyl ether product so obtained.

Abstract: The new compound N,N,N'N'-tetraglycidyl-3,3'-diethyl-4,4'-diaminodiphenylmethane and curable resin compositions containing it.

Abstract: A process for the production of a material having an increased molecular weight relative to the diepoxide starting material the material being either a hydroxy-terminated or an epoxy-terminated material comprisinga) reacting a diepoxide with a dihydroxy compound, in the presence, as catalyst, of a triflate salt of a metal of Group IIA, IIB, IIIA, IIIB, or VIIIA of the Periodic Table of Elements (according to the IUPAC 1970 convention);b) de-activating the triflate salt catalyst; andc) optionally advancing the material produced in step b), with an aromatic diol or phenol.

Abstract: A compound having the formula (I): ##STR1## in which n is an integer ranging from 2 to 6; X is the residue of an optionally substituted primary or secondary aliphatic or cycloaliphatic polyol of formula II:X(OH).sub.n IIin which X and n have their previous significance; and Z is a group of formula:--CH.sub.2 --CH(CH.sub.2 OY)--in which Y is the residue of an optionally substituted primary or secondary aliphatic or cycloaliphatic monohydric alcohol, or Z is a group of formula: ##STR2## in which W is an optionally substituted aliphatic carbon chain, which may contain one or more heteroatoms, or Z is a group of formula--CH.sub.2 --CH(T)--in which T is an aliphatic or cycloaliphatic alkyl group.

Abstract: The new compound N,N,N'N'-tetraglycidyl-3,3'-diethyl-4,4'-diaminodiphenylmethane and curable resin compositions containing it.

Abstract: A polyimide-forming composition comprising(A) a polycarboxylic acid partial ester of formulaHOOC--R.sup.1 --COOR.sup.2 Iwhere R.sup.1 denotes a divalent ethylenically unsaturated aliphatic or cycloaliphatic group of 2 to 20 carbon atoms, and R.sup.2 denotes the residue, after removal of a hydroxyl group, of an alcohol having from 4 to 20 carbon atoms which has a cycloaliphatic, aromatic or heterocyclic ring and is polymerizable on heating in the presence of an acid,(B) a partial ester of formula I above in which R.sup.1 denotes a group of formula II ##STR1## where Ar.sup.1 denotes a tetravalent aromatic group of 6 to 20 carbon atoms linked through aromatic carbon atoms thereof to the indicated carbon atoms, and R.sup.2 is as defined above,(C) an aromatic primary polyamine and(D) a heat-activable substance which releases an acid at a temperature of 100.degree. C. or above.

Abstract: Aromatic N-glycidylamines are prepared by treatment of an amine having at least one, and preferably two or more aromatic amino hydrogen atoms, with epichlorohydrin in the presence, as catalyst, of a di- or higher-valent metal salt of nitric or perchloric acid, or of a carboxylic or sulphonic acid substituted by fluorine, chlorine or bromine on the carbon atom alpha to the carboxylic or sulphonic acid group, and dehydrochlorinating the product. The presence of the metal salt gives a product having a higher glycidyl content and a lower viscosity than does the same reaction in the absence of such a salt.Suitable aromatic amines include aniline, phenylene diamines, phenylene diamines substituted on the aromatic ring and bis(4-aminophenyl)methane. The metal salt may be of, for example, magnesium, calcium, zinc, manganese, nickel, iron, lanthanum, vanadium, ytterbium or uranium.

Abstract: To accelerate the curing of an epoxide resin by means of an aromatic or cycloaliphatic polyamine there is incorporated magnesium, calcium, zinc, manganese, cobalt, or nickel perchlorate. Typically, from 0.2 to 2 parts by weight of the perchlorate is used per 100 parts of the combined weights of the epoxide resin and the polyamine.

Abstract: A process for finishing keratinous material, especially rendering it shrink-resistant or imparting to it durably pressed effects, comprises1. treating the material with a polythiol ester of the formula ##EQU1## WHERE R.sup.1 represents an aliphatic or araliphatic hydrocarbon radical of at least 2 carbon atoms, which may contain not more than one ether oxygen atom,R.sup.2 represents a hydrocarbon radical,p is an integer of from 2 to 6,q is zero or a positive integer of at most 3, such that (p + q) is at most 6, andr and s each represent zero or 1 but are not the same, and2. curing the polythiol ester on the material by means of a polyene containing, per average molecule, at least two ethylenic double bonds each .beta. to an oxygen, nitrogen, or sulfur atom, the sum of such ethylenic double bonds in the polyene and of the mercaptan groups in the polythiol ester being more than 4 and the combined weight of the polyene and the polythiol ester being from 0.5 to 15% by weight of the keratinous material treated.