Patent GB-620791-A (GB)
Title: Pigment coloration of textile fibres
IPC: D06P1/44
Filed: 1947-01-21
Abstract: Textile materials are coloured by padding or printing with an aqueous composition, free from water-immiscible volatile organic solvents, and comprising a pigment and a water-soluble bonding agent consisting of a vinyl-type linear polymer containing -CHO and -OH radicals, and then insolubilizing the bonding agent by heating in the presence or absence of an acid.  The interpolymer may be formed by interpolymerizing an unsaturated aliphatic alcohol monoester and an unsaturated aliphatic aldehyde diester and, if desired, also an unsaturated aliphatic compound free from ester groups, and thereafter hydrolyzing the ester groups under alkaline conditions to give a water-soluble product.  Up to 20 per cent of ethanol or methanol may be added to the composition to improve the solubility of the interpolymer.  Suitable unsaturated aliphatic alcohol monoesters are vinyl acetate, propionate and butyrate, whilst suitable unsaturated aliphatic aldehyde diesters are allylidene diacetate, crotylidene diacetate, 2 - methallylidene diacetate, 2-phenyl-allylidene diacetate, 2-chloroallylidene diacetate, allylidene dipropionate, allylidene dibenzoate and allylidene benzoate-acetate.  As third or even fourth component in the interpolymer there may be used vinyl thioacetate, vinyl chloride, vinyl cyanide, vinyl fluoride, styrene, butadiene, chloroprene, isobutylene, methyl acrylate, methyl methacrylate, vinylidene chloride, ethylene, vinyl acetylene, vinyl carbazole and vinyl pyridine.  Particularly useful is the product obtained by interpolymerizing 1 mol. of allylidene diacetate with from 3 to 25 mols. of vinyl acetate and then splitting off the acetate radicals in an alkaline medium.ALSO:Textile materials are coloured by padding or printing with an aqueous composition, free from water-immiscible volatile organic solvents, and comprising a pigment and a water-soluble bonding agent consisting of a vinyl-type linear polymer containing -CHO and -OH radicals, and then insolubilizing the bonding agent by heating in the presence or absence of an acid.  The interpolymer may be formed by interpolymerizing an unsaturated aliphatic alcohol monoester and an unsaturated aliphatic aldehyde diester and, if desired, also an unsaturated aliphatic compound free from ester groups, and thereafter hydrolysing the ester groups under alkaline conditions to give a water-soluble product.  Up to 20 per cent of ethanol or methanol may be added to the composition to improve the solubility of the interpolymer.  Suitable unsaturated aliphatic alcohol monoesters are vinyl acetate, propionate and butyrate whilst suitable unsaturated aliphatic aldehyde diesters are allylidene diacetate, crotylidene diacetate, 2-methallylidene diacetate, 2-phenyl-allylidene diacetate, 2-chloroallylidene diacetate, allylidene dipropionate, allylidene dibenzoate and allylidene benzoate-acetate.  As third or even fourth component in the interpolymer there may be used vinyl thioacetate, vinyl chloride, vinyl cyanide, vinyl fluoride, styrene, butadiene, chloroprene, isobutylene, methyl acrylate, methyl methacrylate, vinylidene chloride, ethylene, vinyl acetylene, vinyl carbazole and vinyl pyridine.  Particularly useful is the product obtained by interpolymerizing 1 mol. of allylidene diacetate with from 3 to 25 mols. of vinyl acetate and then splitting off the acetate radicals in an alkaline medium.  In examples: (1) copper phthalocyanine is dispersed with an aqueous solution of the hydrolysed interpolymer 10 vinyl acetate: 1-allylidene diacetate, thickened with alginate, printed on cotton muslin and the print heated to 150 DEG  C. for 5 mins.; (2) cotton fabric is padded with a dispersion of chlorinated copper phthalocyanine in the polymer used in (1) and heated as in (1); (3) cotton muslin is printed with a dispersion of the pigment 3,31-dichlorobenzidine \sQ 1-phenyl-3-methyl-5-pyrazolone in an aqueous solution containing the hydrolysed interpolymer 10 vinyl acetate: 2-allylidene diacetate, sodium alginate and acetic acid, and heated as in (1); and (4) cotton is padded with a dispersion of copper phthalocyanine in a hydrolysed solution of an interpolymer containing ethylene, vinyl acetate and allylidene diacetate in the ratio 3 : 87 : 10, steamed in the presence of acetic acid vapours and dried.