Patent GB-876045-A (GB)
Title: Treatment of polyolefine articles
Inventor: GOODINGS ERIC PAUL
IPC: D06P1/673
Filed: 1959-06-26
Abstract: Shaped articles, particularly filaments, fibres and films, comprising stereoregular polyolefins are treated with a fusible and hydrolysable acid halide of a metal, phosphorus or silicon. The polyolefin may be a stereoregular polymer or copolymer of an alpha-olefin, especially isotactic polypropylene.  Specified acid halides include the halides, especially, chlorides, of aluminium, iron, zinc, titanium, vanadium, antimony, tin and silicon. Oxyhalides, particularly those of chromium and phosphorus, are equally suitable and especially phosphorus compounds of the formula:  <FORM:0876045/IV (a)/1> p  where x=0-2; y=1-3; z=0 or 1, x+y=3; R= alkyl or aryl and A=Cl or Br.  Preferred compounds are chromyl chloride and phosphorus oxychloride.  The polyolefin article may be contacted with the acid halide in undiluted form, or in the presence of an inert liquid, or in the form of a molecular complex, for example with organic bases such as pyridine or with dioxan.  Heat may be applied if necessary.  The treated article may then be further treated with water, preferably at an elevated temperature, or steam, so as to form the corresponding ionizable acid or hydroxide of the metal, phosphorus or silicon.  Other hydroxylated liquids may be used in place of water.  The so-treated article shows good affinity for basic and dispersed acetate dyestuffs. Alternatively after imbibition of acid halide, the article may be contacted with a nitrogenous basic substance, e.g. ammonia or an amine, in undiluted form, in aqueous solution or in an anhydrous organic solvent, whereby the article acquires affinity for dispersed acetate and acid dyes.  As a further alternative the article, after imbibition of acid halide, may be dyed directly, preferably from an aqueous dyebath, which may contain ammonia or an amine. Examples describe the treatment of fibres of polyethylene, polypropylene, a 75/25 propylene/ethylene copolymer, and 50/50 mixtures of polypropylene with either polytetrafluoroethylene or polyethylene terephthalate.  Specification 810,023 is referred to.ALSO:The affiinity for dyestuffs of shaped articles, particularly filaments, fibres and films, of stereoregular polyolefins is enhanced by treatment with a fusible and hydrolysable acid halide of a metal, phosphorus or silicon.  The polyolefin may be a stereoregular polymer or copolymer of an alpha-olefin, especially isotactic polypropylene. Specified acid halides include the halides, especially chlorides, of aluminium, iron, zinc, titanium, vanadium, antimony, tin and silicon. Oxyhalides, particularly those of chromium and phosphorus are equally suitable and especially phosphorus compounds of the formula:- <FORM:0876045/IV(c)/1> where X=0 to 2; y=1 to 3; z=0 or 1, x+y=3; R=alkyl or aryl and A=Cl or Br.  Preferred compounds are chromyl chloride and phosphorus oxychloride.  The polyolefin article may be contacted with the acid halide in undiluted form, or in the presence of an inert liquid, or in the form of a molecular complex, for example with organic bases such as pyridine or with dioxan.  Heat may be applied if necessary.  The treated article may then be further treated with water, preferably at an elevated temperature, or steam, so as to form the corresponding ionizable acid or hydroxide of the metal, phosphorus or silicon.  Other hydroxylated liquids may be used in place of water.  The so-treated article shows good affinity for basic and dispersed acetate dyestuffs. Alternatively, after imbibition of acid halide, the article may be contacted with a nitrogenous basic substance, e.g. ammonia or an amine, in undiluted form, in aqueous solution or in an anhydrous organic solvent, whereby the article acquires affinity for dispersed acetate and acid dyes. As a further alternative the article, after imbibition of acid halide, may be dyed directly, preferably from an aqueous dyebath, which may contain ammonia or an amine.  Examples describe the treatment of fibres of polyethylene, polypropylene, a 75/25 propylene/ethylene copolymer, and 50/50 mixtures of polypropylene with either polytetrafluoroethylene or polyethylene terephthalate. Specification 810,023 is referred to.