Patent GB-444498-A (GB)
Title: Improvements in the treatment of textile materials
IPC: D06P1/92
Filed: 1934-10-03
Abstract: Textile materials are simultaneously de-sized and dyed by treatment with an organic solvent for the size, such solvent containing the dyestuff to be applied.  A yarn may be coated with size from solution in a volatile organic solvent and woven or otherwise made into fabric and the latter treated with the organic solvent containing the dyestuff.  Specified sizes are polyvinyl alcohol (in an alcohol or aqueous alcohol) and its esters (in benzene, toluene or like hydrocarbons), e.g. the acetate, chloride and bromide; resin acid salts (in benzene, toluene or like hydrocarbons), e.g. calcium abietate and mono-, di- and tri-ethanolamine salts of resin acids; cellulose derivatives, e.g. nitrocellulose (in mixtures of amyl acetate and amyl alcohol). Acetone may also, in some cases, be used as the organic solvent. In the treatment of mixed fabrics the de-sizing solution may contain dyestuffs suited to the several fibres, e.g. Chlorazol green BN for cotton and rosaniline hydrochloride for wool.  The following examples are specified: (1) A cellulose acetate yarn, sized during a winding operation by contact with a roller dipping into a solution of vinyl acetate in toluene, followed by exposure to light to polymerize the vinyl acetate, is woven into a fabric which is treated with benzene at 65 DEG  C. containing 1 : 4-di-(methylamino)-anthraquinone to obtain a blue dyeing with removal of most of the vinyl acetate size.  (2) A viscose yarn, sized with a solution of polyvinyl alcohol in methanol, is woven into a fabric which is de-sized and dyed green by treatment with methanol at 20--30 DEG  C. containing Chlorazol green BN.  (3) A cellulose acetate yarn, sized with a solution of nitrocellulose in amyl acetate and amyl alcohol, is woven into a fabric which is de-sized and dyed orange by treatment with a mixture at 20--30 DEG C. of amyl acetate and amyl alcohol containing p - nitrobenzeneazodimethylaniline.  (4) A silk or wool yarn, sized during a winding operation by contact with a roller dipping into a solution of vinyl acetate in toluene, followed by exposure to light to polymerize the vinyl acetate, is woven into a fabric which is de-sized and dyed scarlet by treatment with acetone at 20--30 DEG  C. containing rosaniline hydrochloride.ALSO:In a process for simultaneously de-sizing and dyeing textile materials by treatment with an organic solvent for the size, such solvent containing the dyestuff to be applied, yarn, coated with size from solution in a volatile organic solvent, being woven or otherwise made into fabric and the latter treated with the organic solvent containing the dyestuff, specified sizes are polyvinyl alcohol (in an alcohol or aqueous alcohol) and its esters (in benzene, toluene or like hydrocarbons), e.g. the acetate, chloride, and bromide, resin acid salts, (in benzene, toluene or like hydrocarbons), e.g. calcium abietate and mono-, di- and tri-ethanolamine salts of resin acids; cellulose derivatives, e.g. nitrocellulose (in mixtures of amyl acetate and amyl alcohol). Acetone may also, in some cases, be used as the organic solvent. In examples the process is applied to (1) fabric from a cellulose acetate yarn, sized by contact with a roller dipping into a solution of vinyl acetate in toluene, followed by exposure to light to polymerize the vinyl acetate; (2) fabric from a viscose yarn, sized with a solution of polyvinyl alcohol in methanol; (3) fabric from a cellulose acetate yarn, sized with a solution of nitrocellulose in amyl acetate and amyl alcohol; (4) fabric from a silk or wool yarn, sized by contact with a roller dipping into a solution of vinyl acetate in toluene, followed by exposure to light to polymerize the vinyl acetate.