Abstract: Glycidyl ethers prepared from the reaction of 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl and halohydrin form upon curing resins having high heat distortion temperatures. The ethers have utility in the manufacture of powder coatings, adhesive compositions, laminates and molding compositions.

Abstract: A process of making modified epoxy resins wherein a polyepoxide resin is reacted with a mercaptan compound of the formula HS--R--(COOX).sub.m wherein R is an organic radical having from 1 to 10 carbon atoms, X is hydrogen or a moiety formed by reacting the carboxyl group with a basic compound to form its salt and m is an integer of from 1 to 5. The compounds are reacted in the presence of a tin catalyst to produce resins of the structureB [--S--R--(COOX).sub.m ].sub.nwherein B is the residue from the ring opening reaction of an epoxide group on the polyepoxide resin molecule and the sulfhydryl hydrogen, R, X and m are as defined previously and n is at least 1. The aforementioned resins are produced without the need of a hydrolysis step.The modified epoxy resins are useful in formulating coating compositions having excellent physical and chemical properties. The resins can be dissolved or dispersed in water to form aqueous coating compositions.

Abstract: Curable compositions are prepared comprising a polyepoxide compound, and as a curing agent, a cyanamide of a secondary amine. The curable compositions may be applied as a one package system and they are useful as laminating, surface coating resins, sintering powders, molding resins and adhesives.

Abstract: The adhesive strength of amine-cured epoxy resins are improved by the addition of a bis ureide of a polyoxyalkylene polyamine additive. The improved epoxy resin composition comprises a vicinal polyepoxide, an effective amount of a polyamine curing agent, and an effective amount of an adhesive strengthening additive consisting essentially of a bis ureide of a polyoxyalkylene polyamine, said additive having an average molecular weight of at least 4,000.

Abstract: A light sensitive material suitable for coating onto a support to produce a light sensitive plate for use in, for example, the manufacture of a printing plate comprises groups of the formula: ##STR1## attached to carbon atoms of a polymer, wherein --Z-- is --o-- or ##STR2## or ##STR3## wherein R.sub.5 represents a hydrogen atom or an alkyl group; R is an aromatic radical; a is zero or unity; R.sub.1, R.sub.2 and R.sub.3 are hydrogen atoms, halogen atoms, cyano groups, or specified aliphatic or aromatic groups; X is a deactivating group; R.sub.4 is a hydrogen atom, a carboxyl group, a cyano group or a specified aliphatic or aromatic group; and Ph is a phenyl group. The material may be produced by reacting a polymer containing epoxide groups, hydroxyl groups, or primary and/or secondary amino groups with the halosulphonyl group of a compound having the formula: ##STR4## wherein R, R.sub.1, R.sub.2 R.sub.3, and a having the above meanings, wherein X has the above meaning or is a halosulphonyl group and R.sub.

Abstract: To accelerate the curing of epoxide resins by aromatic, heterocyclic, or cycloaliphatic polyamines there are employed salts of trifluoromethanesulfonic acid.

Abstract: The disclosed curing agents or initiators have the formula ML.sub.n (O-SO.sub.2 -R.sub.f).sub.m wherein L is an imidazole, M is a metal, n is a coordination number of M, R.sub.f is a fluorinated alkyl group, and m is the valence of M. These curing agents are useful in latent curable epoxy systems. Upon heating to the cure temperature (e.g. 100.degree. - 250.degree. C.), such systems cure efficiently and with a low exotherm.