Polymer receptivity to dyestuffs

摘要

Extrudible compositions comprise a crystalline olefin or aryl-substituted olefin polymer and a metal complex of a Mannich base of a phenol sulphide of formula where R is alkyl and R1 is alkyl or hydrogen, in amount sufficient to improve the receptivity of the polymers to disperse and chelating dyes. Specified polymers are polyethylene, polypropylene, polybutene - 1, poly - 4 - methyl-pentene-1 and polystyrene. The compositions may be made into dyeable fibres, films, tapes and other shaped articles, by extrusion. Examples describe compositions of polypropylene with (1) the zinc derivative of 2,21-thiobis (4-t. octyl-6-diethylaminomethylphenol); (2) the nickel derivative of 2,21-thiobis (4-t. octyl-6-diethylaminomethylphenol); and (3) the zinc derivative of 2,21-thiobis (4-t. octyl-6-dibutylamino methylphenol).ALSO:Mannich bases of bis-phenol sulphides of formula where R is alkyl and R1 is hydrogen or alkyl, may be prepared by refluxing a solution of the bis-phenol sulphide with a secondary amine and formaldehyde. Complexes of the Mannich bases with metals may be prepared by heating the bases with metal salts, preferably in the presence of solvents. In examples, 2,21-thio-bis-(4-t-octyl phenol) is reacted with diethylamine and formaldehyde and the product converted to metal complexes with (1) zinc acetate dihydrate and (2) nickel acetate tetrahydrate, and with dibutylamine and formaldehyde and the product converted to a metal complex with (3) zinc acetate dihydrate.ALSO:Articles such as fibres, films and tapes spun from polymers of 1-olefins or aryl-substituted 1-olefins which polymers contain or which articles have been treated with a solution or dispersion of a metal complex of a Mannich base of a phenol sulphide of formula: where R is alkyl and R/sv is hydrogen or alkyl, are dyed with disperse and chelating dyes. Dyeing may be effected in a bath containing surfactant and acetic acid. Fibres dyed with chelating dyes are rinsed and subjected to reducing treatment in a bath of sodium carbonate and hydrosulphite. Examples describe the dyeing of fibres spun from compositions comprising polypropylene and (1) the zinc complex of 2,2/svthio bis (4-t. octyl- -6-diethylamino methylphenol, (2) the nickel complex of 2, 2/sv-thio bis (4-t octyl-6-diethylamino methyl phenol) and (3) the zinc complex of 2, 2/svthio bis (4-t. octyl-6- dibutylamino methyl phenol).