Abstract: The adhesion properties of amine-cured epoxy resins are unexpectedly enhanced by addition of certain amino terminated polyether ureylene additives. The adhesively superior epoxy resin composition comprises a vicinal polyepoxide, a curing amount of an amine curing agent, and an effective amount of a polyether ureylene having terminal amino groups and a molecular weight of from about 4000 to about 4500.

Abstract: Epoxy resin compositions having extended reactivity (gel time) are prepared by adding phosphate or phosphite compounds to epoxy resin-dicyandiamide-tertiary amine curing systems. Such compositions are useful in preparing glass fiber laminates and powder coatings.

Abstract: Epoxy resins, particularly those of the polyglycidyl ether of a polyhydric phenol type, are cured by incorporating therein a polyoxyalkylenepolyamine usually with an accelerator such as a combination of piperazine and an alkanolamine. Rapidity of curing is further improved by substituting from about 50 wt% to 100 wt% of the dithiocarbamate salt of the polyoxyalkylenepolymine for the polyoxyalkylenepolyamine. The epoxy resin products are useful in protective coatings, adhesives, seamless and terrazzo flooring, castings, laminates, and in grouting, potting, encapsulating, caulking and sealing compositions.

Abstract: Low-temperature curing epoxy compositions are described comprising (1) a saturated epoxy resin, (2) a curing amount of certain aliphatic amines and (3) an organic solvent selected from the group consisting of alcohols, glycols, and glycol ethers.

Abstract: A new composition has been found comprising an antistatic fiber selected from the group consisting of polyamide, polyester, polyurea, polyurethane, or polysulfonamide, said fiber containing between about one percent and about twelve percent by weight of at least one compound having a molecular weight above 1500 selected from the group consisting of compounds represented by the formulas: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from nonovalent hydrocarbon radicals having 1 to 20 carbon atoms derived from aliphatic, aromatic, cycloaliphatic, aromaticaliphatic, heterocyclic hydrocarbons or --(C.sub.r H.sub.2r O).sub.m (C.sub.p H.sub.2p O).sub.q --H; R.sub.5 is at least one of the alkylene difunctional radicals having 2 to 15 carbon atoms and a radical selected from ##STR2## R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are independently selected from R.sub.1, R.sub.2, R.sub.3, R.sub.4, H or another monovalent hydrocarbon radical having 1 to 20 carbon atoms as defined for R.sub.

Abstract: This invention relates to the identification of salts of benzenephosphonic acid and melamine that are useful as additives for reducing the flame-propagation of normally flammable organo-polymers.The physical and chemical properties of the benzenephosphonic acid-melamine addition products may be modified by varying the mol ratios of the reactants.The salts of benzenephosphonic acid and melamine may be functionally inert or reactive when incorporated as additives, depending on their composition and the polymer system involved. Thus, applied to polyurethane foams, it is desirable that the additive be characterized as inert during the foaming reaction, whereas applied to monomeric-type epoxy systems, they may advantageously have the dual function of entering into the oxirane curing mechanism as well as imparting flame-retardency; in either case, the resultant products are unexpectedly and markedly improved in their resistance to flame initiation and flame propagation.