Patent GB-1058652-A (GB)
Title: Aminoplast compositions for use in textile finishing
IPC: D06M13/11
Filed: 1963-10-18
Abstract: A composition for imparting crease-resistance to cellulosic textiles comprises an aqueous solution in which are mixed (a) an aminoplast precondensate derived from formalydehyde which is thermosetting and/or which cross-links with cellulose; (b) an acid or acid-liberating catalyst, and (c) a compound having an average per molecule of (m - n) groups -CH(OH)CH2X and n groups <FORM:1058652/C3/1> where m is at least 2, n is between 0 and 1 inclusive, and X is halogen, and having a boiling point above 170 DEG C.  The preferred precondensates (a) are those of formaldehyde with urea, or urea derivatives, or ethers thereof, e.g. ethyleneurea, propyleneurea, dioxyethyleneura, acetylene diurea, hydroxypropyleneurea, N-methyltriazone, N-ethyltriazone, N-propyltriazone, melamine or dicyandiamide. Preferred catalysts (b) are water soluble salts, e.g. chlorides, nitrates, sulphates of polyvalent metals, e.g. Mg, Zn, Al, Zr.  The compounds (c) may be ethers of glycidol or glycerin monohalohydrin and an aliphatic polyol of 2-6 C atoms, or acetals of glycidol or a glycerin halohydrin with a C 1-4 aldehyde.  The solution should contain (a) sufficient to deposit 1.5-8.5 gm. of (a) per 100 gm. of textile, and (c) sufficient to deposit 5-15 gm. of (c) per 100 gm. of textile, and may also contain brightening, bluing, softening, or finishing agents. Crease resistance may be enhanced by treating the heat-cured textile with a strongly alkaline solution.  In examples aqueous solutions are prepared containing (1) dimethylol urea, tetramethyl hexamethylolmelamine, ethylene glycol bis(glycerin chlorohydrin ether) and MgCl2, (2) dimethylol ethylene triazine, a partly hydrolysed glycerol/epichlorhydrin adduct, a polyethylene emulsion octadecyl urea and Zn(NO3)2, (3) dimethylol propyleneurea, 1:4 - dichloro - butane - 2:3 - diol and ZnCl2, (4) dimethylol dioxyethyleneurea, ethylene glycol bis(glycerin chlorohydrin ether), MgCl2 and ethanol, and (5) dimethylolurea, hexamethylolmelamine, butylene glycol bis(glycerin chlorohydrin ether), Zn(NO3)2 and methanol.ALSO:Cellulosic textile materials may be rendered crease-resistant by soaking in a composition comprising an aqueous solution in which are mixed (a) an aminoplast precondensate derived from formaldehyde which is thermosetting and/or which cross-links with cellulose, (b) an acid or acid-liberating catalyst, and (c) a compound containing an average per molecule (m-n) groups -CH(OH)CH2X, and n groups <FORM:1058652/D1-D2/1> , where m is at least 2, n is between O and 1 inclusive, and X is halogen (see Division C3).  After the soaking excess composition is removed, the textile is dried and cured by heating at above 120 DEG C. for 1-10 mins.  The product may be further treated with a solution of a strong base, e.g. a 2-22% solution of an alkali metal hydroxide or carbonate, at up to 100 DEG C, then rinsed and acidified to remove residual base.  The composition may also contain optical brightening, bluing, softening or other finishing agents, e.g. dispersions of low molecular weight polyethylenes, esters of polyacrylic acid, and emulsions of higher fatty acid amines.  In Examples (1) mercerized cotton poplin is soaked in an aqueous solution of dimethylolurea, tetramethyl hexamethylolmelamine, ethylene glycol bis (glycerin chlorohydrin ether) MgCl2, then squeezed, dried treated with 8% NaOH, squeezed, let stand, rinsed, acidified, rinsed and dried, (2) cotton cretonne is similarly treated using an aqueous solution of dimethylol ethylenetriazine, a partially dehydrochlorinated glycerol/epichlorhydrin adduct, a polyethylene emulsion, octadecylurea and Zu (NO3)2, (3) cotton-polyester gabardine is similarly treated with 1:4-dichloro-butane-2:3-diol, dimethylol propyleneurea and Zu Cl2 (4) mercerized cotton poplin is similarly treated with dimethylol dioxyethyleneurea, ethylene glycol bis (glycerin chlorohydrin ether), MgCl2, and ethanol, then finally treated with an emulsion of an ester of polyacrylic acid, (5) viscose rayon lining material is similarly treated with dimethylolurea, hexamethylolmelamine, butylene glycol bis (glycerin chlorohydrin ether), Zu(NO3)2 and methanol.