Patent GB-607950-A (GB)
Title: Improvements in or relating to finishing textile fabrics and compositions therefor
IPC: D06M15/423
Filed: 1943-02-02
Abstract: A composition for improving shrink resistance, crease resistance, and water-repellency (see Group VIII) of textiles contains an aqueous dispersion of an alkylated methylol melamine containing alcohol residues equivalent to at least two alkylated methylol groups, the alcohol having not more than four carbon atoms in the molecule, and 0.5-5 parts by weight of a nitrogen-containing compound having the general formula <FORM:0607950/IV(a)/1> (where Y is hydrogen, methylol or ethylol and R is an alkyl group containing at least 7 carbon atoms) for each ten parts of the melamine derivative.  The treated material is heated to 200-450 DEG  F. to insolubilise the resin-forming ingredients of the composition, preferably in the presence of an acid catalyst, e.g. oxalic acid, diammonium hydrogen phosphate; methyl acid hypophosphate; triethanolamine, phthalate; acetic acid or sulphurous acid.  Suitable nitrogen-containing compounds are stearamide, methylol stearamide, ethylol stearamide, methylol lauramide.  The aqueous dispersion, containing 2-15 per cent of the mixed ingredients may be prepared by stirring a solution of the amido compound in ethyl alcohol, isopropyl alcohol or an alkyl ether of ethylene glycol into an aqueous dispersion of the alkylated methylol melamine at 80-140 DEG  F.  Dispersing agents such as sodium isopropyl naphthalene sulphonate, dioctyl sodium sulphosuccinate, ammonium caseinate, gelatine, glue or gum arabic may be added if desired.  In an example, melamine is condensed with formaldehyde and the product alkylated with methanol.  A solution of the product in methanol was mixed with water, sodium isopropyl naphthalene sulphonate and methylol stearamide with stirring at 110 DEG  F. Diammonium hydrogen phosphate was added to the dispersion formed. Cotton percale was impregnated with the dispersion by the dip and nip process, dried and cured.  Examples are also given of the preparation of dispersion of stearamide formaldehyde and methylated methylol melamine in water, the methylol stearamide being formed in situ and a paste-like mass being obtained which may be diluted with water to yield a dispersion ready for use.  Specification 486,577 is referred to.  The Specification as open to inspection under Sect. 91, includes the use of compounds containing a hydrophobic alkyl radical of at least 7 carbon atoms and containing a nitrogen atom having attached thereto an acid group, in conjunction with the alkylated methylol melamine.  Suitable compounds fit the formula <FORM:0607950/IV(a)/2> where Y is hydrogen or a substituted or unsubstituted alkylol radical, Z is oxygen or sulphur, and X and R are hydrogen, non-functional substituents or radicals containing hydrophobic alkyl groups of at least 7 carbon atoms.  Lists of suitable compounds are given.  A few typical ones are N-methylstearamide, N-ethyllauramide, di(octyl)cyanacetamide, N-b -cyanethyllauramide, stearoyl urea, N-myristyl thiourea, N-methylol-N1-stearoyl-N1-ethyl urea, stearanilide, N-acetyloctadecylamine, dodecylcarbamate, N-methylol-octadecyl carbamate, octadecylnitrocarbamate, monostearoylammeline, N-cyclohexylstearamide, di-(tetradecyl) succinamide, the octadecyl ester of succinamic acid, N-lauroyl-ethyl urethane, lauryl-N-carbethoxycarbamate, methyl-N-tetradecylmethylsulphonamide.  Many others are mentioned. This subject-matter does not appear in the Specification as accepted.ALSO:A composition for improving shrink resistance, crease resistance and water repellency (see Group VIII) of textiles contains an aqueous dispersion of an alkylated methylol melamine containing alcohol residues equivalent to at least two alkylated methylol groups, the alcohol having not more than four carbon atoms in the molecule; and 0.5-5 parts by weight of a nitrogen - containing compound having the general formula <FORM:0607950/IV (c)/1> (where Y is hydrogen, methylol or ethylol and R is an alkyl group containing at least 7 carbon atoms) for each ten parts of the melamine derivative.  The treated material is heated to 200-450 DEG  F. to insolubilize the resin-forming ingredients of the composition, preferably in the presence of an acid catalyst, e.g. oxalic acid, diammonium hydrogen phosphate; methyl acid pyrophosphate triethanolamine phthalate; acetic acid or sulphurous acid.  Suitable nitrogen-containing compounds are stearamide, methylol stearamide, ethylol stearamide, methylol lauramide.  The aqueous dispersion, containing 2-15 per cent of the mixed ingredients may be prepared by stirring a solution of the amide compound in ethyl alcohol, isopropyl alcohol or an alkyl ether of ethylene glycol into an aqueous dispersion of the alkylated methylol melamine at 80-140 DEG  F. Dispersing agents such as sodium isopropyl naphthalene sulphonate, dioctyl sodium sulphosuccinate, ammonium caseinate, gelatine, glue or gum arabic may be added if desired.  In an example, melamine is condensed with formaldehyde and the product alkylated with methanol. A solution of the product methanol was mixed with water, sodium isopropyl, naphthalene sulphonate and methylol stearamide with stirring at 110 DEG  F.  Diammonium hydrogen phosphate was added to the dispersion formed.  Cotton percale was impregnated with the dispersion by the dip-and-nip process, dried and used.  Example is also given of the preparation of dispersion of stearamide formaldehyde and methylated methylol melamine in water, the methylol stearamide being formed in situ and a paste-like mass being obtained which may be diluted with water to yield a dispersion ready for use. Specification 486,577 is referred to.  The Specification as open to inspection under Sect. 91 includes the use of compounds containing a hydropholic alkyl radical of at least 7 carbon atoms and containing a nitrogen atom having attached thereto an acid group, in conjunction with the alkylated methylol melamine.  Suitable compounds fit the formula <FORM:0607950/IV (c)/2> where Y is hydrogen or a substituted or unsubstituted alkylol radical, Z is oxygen or sulphur, and X and R are hydrogen, nonfunctional substituents or radicals containing hydropholic alkyl groups of at least 7 carbon atoms.  Lists of suitable compounds are given.  A few typical ones are N-methylstearamide, N - ethyllauramide, di(octyl)cyanacetamide, N - b -cyanethyllauramide, stearoyl urea, N-myristil thiourea, N-methylol-N1-stearoyl-N1-ethyl urea, stearanilide, N-acetyloctadecylamine, dodecyl carbamate, N-methyloloctadecyl carbamate, octadecylnitrocarbamate, monostearoylammeline, N - cyclohexylstearamide, di(tetradecyl) succinamide, the octadecyl ester of succinamic acid, N-lauroyl-ethyl urethane, lauryl-N-carbethoxycarbamate, methyl-N-tetradecylmethylsulphonamide. Many others are mentioned.  This subject-matter does not appear in the Specification as accepted.