GB740720A - Chemical products - Google Patents

Abstract

Polyamine copolymers having an amino nitrogen content of from 0.3 to 10 per cent are prepared by reacting ammonia or a monoamine having at least one hydrogen atom bonded to a basic nitrogen atom and having an aliphatic or cycloaliphatic substituent containing 1 to 8 carbon atoms, with a copolymer of a monoethylenically unsaturated epoxymonomer and at least one other polymerizable vinylidene epoxy-free monomer, combined in a mol. ratio of 1 : 1 to 1 : 75, the copolymer having a molecular weight of at least 800 and an epoxide oxygen content of 0.4 to 0.8 per cent. Epoxy monomers specified are glycidyl acrylate, methacrylate, and sorbate, glycidyl vinyl phthalate, glycidyl allyl phthalate, glycidyl allyl maleate, glycidyl allyl ether, glycidyl vinyl ether, 1,2-epoxybutene-3, and allyl alpha, betaepoxyisovalerate. Copolymerizable monomers specified are butyl acrylate and methacrylate, methyl methacrylate, acrylonitrile, butadiene, chloroprene, vinyl acetate, vinyl ethers, styrene, and vinyl and vinylidene chlorides. Amines specified are mono- and di-methylamine, monoand di-ethylamine, isopropylamine, butylamine, amylamine, 2 - ethylhexylamine, cyclohexylamine, ethanolamine, and diethanolamine. The copolymers may be prepared in bulk, or solution in solvents such as benzene, dioxane, isopropyl alcohol, and methyl isobutyl ketone, with the aid of catalysts such as benzoyl peroxide, ditertiary butyl peroxide, and alpha, alpha-azodiisobutyronitrile, the copolymers preferably being in the form of oily viscous liquids with molecular weights of 1000 to 8000. The reaction between the epoxy copolymers and the ammonia or amines may be carried out at low, normal, or elevated temperatures in the presence or absence of an inert solvent such as benzene, dioxane, methyl ethyl ketone, or isopropyl alcohol. The after-treated polymers are soluble in dilute acids, such as carbonic, acetic, adipic, benzoic, oleic, drying oil, and castor oil acids, and may also be treated with formaldehyde. The polyamine copolymers may be used in coating, impregnating, and adhesive compositions, as dispersing agents for waxes and oils, and as binders for printing inks and paints. Specification 722,258 is referred to.