Patent GB-770966-A (GB)
Title: Improvements in bactericidal and fungicidal compositions
IPC: D06M16/00
Filed: 1954-11-23
Abstract: Cellulose derivatives of heavy metal-quaternary ammonium compounds are prepared by reacting together hydrated heavy metal oxides, water-soluble cellulose derivatives capable of forming water-soluble co-ordinated compounds with such oxides, and a quaternary ammonium salt.  Advantageously, aqueous solutions of a co-ordination complex compound of the heavy metal oxide with the soluble cellulose derivative is first formed to which is then added the quaternary ammonium compound.  Specified heavy metals are copper, chromium, iron, cobalt and nickel.  Specified cellulose derivatives are hydroxyethyl cellulose, methyl cellulose, ethyl cellulose and carboxymethyl cellulose.  Specified quaternary ammonium compounds are alkyldimethylbenzylammonium chlorides, cetyltrimethyl ammonium bromide, diisobutylphenoxyethyoxyethyl - dimethyl - benzylammonium chloride and polyalkylnaphthalene - methyl pyridinium chlorides.ALSO:Heavy metal-quaternary ammonium complex compounds are prepared by reacting together hydrated heavy metal oxides, hydrophilic colloids capable of forming watersoluble co-ordinated compounds with such oxides and a quaternary ammonium salt. Advantageously aqueous solutions of a coordination complex compound of the heavy metal oxide with the hydrophilic colloid is first formed to which is then added the quaternary ammonium compound.  Specified heavy metals are copper, chromium, iron, cobalt, nickel.  Specified hydrophilic colloids are polysaccharides, particularly starches and degraded starches, dextrans, pentosans, sorbitans, pectins, vegetable gums such as arabic, karaya, tragacanth and locust beans, soluble cellulose and derivatives such as hydroxyethyl cellulose, methyl cellulose, ethyl cellulose and carboxymethyl cellulose, and synthetic polyols such as polyvinyl alcohol and its derivatives.  Specified quaternary ammonium compounds are alkyldimethylbenzylammonium chloride, cetyltrimethyl ammonium bromide, di-isobutylphenoxyethoxy ethyl dimethylbenzyl ammonium chloride and polyalkyl naphthalenemethyl pyridinium chloride.ALSO:Seeds are impregnated with a fungicidal and bactericidal heavy metal quaternary complex compound of a hydrophilic colloid by first treating them in an aqueous solution containing a co-ordination compound formed by the reaction of a hydrated heavy metal oxide and a hydrophilic colloid and then in a second aqueous solution containing a quaternary compound which precipitates the impregnant in situ.  Hydrated oxides of copper, chromium, iron, cobalt and nickel may be used.  The hydrophilic colloid may be starch, degraded starch, pectin, a dextran, pentosan or sorbitan, gum arabic, karaya gum, gum tragacanth or locust beam gum, soluble cellulose, methyl, ethyl, hydroxyethyl or carboxymethyl cellulose, polyvinyl alcohol or a derivative thereof.  The quaternary compound may be cetyltrimethyl ammonium bromide, diisobutylphenoxyethoxy-ethyldimethylbenzyl ammonium chloride, an akyldimethylbenzyl ammonium chloride or a polyalkylnaphthalene-methylpyridinium chloride (see Group IV(b)). Alternatively, seeds are treated with a dusting powder or emulsion containing a heavy metal quaternary complex compound of a hydrophilic colloid.ALSO:Fungicidal and bactericidal compositions comprise heavy metal-quaternary ammonium complex compounds of hydrophilic colloids. The quaternary ammonium compounds may advantageously be formed in situ on fabric, paper, seed, or leather.  Specified heavy metals are copper, chromium, iron, cobalt and nickel. Specified quaternary ammonium compounds are alkyldimethylbenzylammonium, chloride, cetyltrimethylammonium bromide, diisobuty - phenoxy - ethoxyethyldimethylbenzylammonium chloride, and polyalkylnaphthalenemethylpyridinium chloride. Specified hydrophilic colloids are polysaccharides, particularly starches and degraded starches, dextrans, pentosans, sorbitans, pectins, vegetable gums such as arabic, karaya, tragacanth and locust beans, soluble cellulose and derivatives such as hydroxyethyl cellulose, methyl cellulose, ethyl cellulose and carboxymethyl cellulose, and synthetic polyols such as poly-vinyl alcohol and its derivatives.