GB745179A - A method and preparation for imparting a durable form to human hair or other proteinaceous fibres - Google Patents

Abstract

An ester of an amino-alcohol with titanic or zirconic acid, the amino-alcohol having the formula HORN(R1)(R11), where R is ethylene or an alkyl-substituted ethylene group, R1 is a b -hydroxyalkyl or b -aminoalkyl radical, and R11 is hydrogen, an alkyl radical of 1 to 3 carbon atoms or a b -amino-alkyl or b -hydroxy alkyl radical, is obtained by an ester exchange reaction between an alkyl titanate or zirconate and the amino alcohol, which may be triethanolamine, b -aminoethylethanolamine or diethanolamine. The number of hydroxy groups per titanium or zirconium atom may vary from two to twelve, typical products being obtained by the reaction of one mol. of butyl titanate with one mol. of diethanolamine or two mols. of b -aminoethylethanolamine or four mols. of triethanolamine. In examples, esters are produced from triethanolamine and tetrabutyl titanate or tetrabutyl zirconate, and from b -amine-ethylethanolamine and tetra-isopropyl titanate. In example (8), triethanolamine is reacted with tetrabutyl titanate at 25 DEG C., and butyl alcohol is distilled off under reduced pressure to leave a triethanolamine solution containing 5 aminoalcoholic hydroxy groups for each titanium atom.ALSO:In a process of curling or crimping human hair, horse hair, wool, silk, zein, casein, soyabean, peanut or other protein fibres, or straightening already curly human hair, the fibres are treated with a liquid comprising an ester of titanic or zirconic acid with an amino alcohol of the formula HORN (R1) (R11), where R is ethylene or an alkyl-substituted ethylene group, R1 is a beta-hydroxyalkyl or betaaminoalkyl radical and R11 is hydrogen, an alkyl radical of 1 to 3 carbon atoms or a beta-aminoalkyl or beta-hydroxyalkyl radical. The ester may be obtained by an ester exchange reaction between an alkyl titanate or zirconate, such as tetra-butyl titanate or tetra-isopropyl titanate, and an amino alcohol such as triethanolamine, beta-aminoethyl-ethanolamine or diethanolamine. The ester may be a liquid suitable for application without dilution or may be applied in aqueous or alcoholic solution. The treatment of human hair may be at room temperature or above and the solution may be activated by the inclusion of, or by pre- or after treating the hair with, acetic or formic acid, ammonium chloride, sodium hydroxide, sodium carbonate, ammonium carbonate, borax, ethylene diamine, hydrogen peroxide, sulphides or disulphides. Human hair may be wound upon curlers, and the liquid may be applied by a sponge and removed with water after a period varying from 5 minutes to 3 hours while the hair is still wound or after unwinding the hair. The hair may be after-treated with hydrogen peroxide and is subsequently dried. In Example VIII wool cloth is impregnated with an aqueous solution of the ester obtained by reacting triethanolamine and tetrabutyl titanate at 25 DEG C., whereafter it is squeeze-dried, pleated and simultaneously dried on a roller heated to 140 DEG C., and finally washed with water and dried.