GB652566A - Polymeric products - Google Patents

Abstract

Monoolefin/carbon monoxide polymers in which the ratio of monoolefin to carbon monoxide is from 150 : 1 to 1 : 1 have the oxygen of the carbon monoxide replaced by an amino-nitrogen group by reducing the polymer in the presence of ammonia or a primary or secondary amine. The replacement is preferably effected by bringing into intimate contact, in the presence of a hydrogenation catalyst at a temperature between 50 DEG and 300 DEG C. and a total pressure in excess of 20 atmospheres, the polymer, hydrogen, and ammonia or the primary or secondary amine and, if desired, organic solvents, e.g. benzene, xylene, cyclohexane, decahydronaphthalene, diethyl ether, dioxane and isopropanol. Specified monoolefins are ethylene, propylene, isobutylene and mixtures. Hydrogenation catalysts specified are nickel, cobalt, platinum, ruthenium, palladium and combinations of these metals with dehydrating metal oxides, e.g. combinations of ruthenium or nickel with alumina or thoria. Specified amines are methylamine, dimethylamine, ethylamine, pentylamine, decylamine, dodecylamine, octadecylamine, dibutylamine, diamylamine, didodecylamine, cyclohexylamine, dicyclohexylamine, aniline and diphenylamine. Formamide may be used as a source of ammonia. The monoolefin/carbon monoxide polymers may also contain other polymerizable organic compounds such as vinyl chloride, vinyl acetate, styrene, methyl methacrylate, dimethyl maleate, maleic anhydride, or vinylidene compounds. The Specification includes an example of the preparation of an ethylene/carbon monoxide polymer. Solutions and dispersions of the polymers may be used for impregnating and coating fibrous materials such as textiles, wood pulps and paper, and for the preparation of films and fibres. The polymers may also be used as leather treating agents to improve dye receptivity, as additives for bentonite drilling muds, as peptizing agents for rubber, deflocculating agents for water-repellant waxes, water-repellant finishes, shrinkage reducing agents, acid dyestuff fixing agents, antistatic agents for polyethylenes, anti-fogging agents for glass, as intermediates for oil-soluble dyestuffs for colouring polyethylene films and fibres, and as dispersants for metallic enamels. Specified solvents for the aminepolymers are acetic acid, xylene, benzene, toluene and the solutions may include other ingredients such as formaldehyde, methylene distearamide, copper phthalocyanine dyestuff and titanium dioxide.ALSO:Polyamines made from a monoolefin/carbon monoxide hetoropolymer by replacing the oxygen of the carbon monoxide by an amino-nitrogen group (see Group IV (a)), are used for fixing dyestuffs, e.g. acid dyestuffs in fibres and fabrics, for proofing fabrics against shrinkage, e.g. woollens and sateens, and as intermediates for oil-soluble dyestuffs in the colouring of polyethylene films and fibres. The proofing against shrinkage may be effected by impregnating the fabric with a solution of the polyamine, removing excess liquid by squeezing and drying in air or at 100-135 DEG C. The solvent may be acetic acid and formaldehyde or xylene or benzene and the solution may contain other ingredients such as methylene distearamide. In an example of fabric dyeing, a suspension of blue copper phthalocyanine pigment in a solution of a polyamine in acetic acid is used to make "strike-outs" on cotton broadcloth and "fixed" by drying for 24 hours.