GB790837A - Improvements in or relating to the treatment of fibrous materials with resinous condensation products - Google Patents

Abstract

Organic textile materials are treated with an aqueous solution containing an intermediate condensation product of an aminoaldehyde resin, an acidic catalyst for further condensing the resin and a condensation product of a polyhydric alcohol and a mono- or polycarboxylic acid or of a monohydric alcohol and a polycarboxylic acid, and thereafter the fibres are dried and heated to form the aminoaldehyde resin. In a modification, the aminoaldehyde and the condensation product are applied separately. The textile materials treated may be fibres, threads, yarns, fabrics or felts of cotton, linen, regenerated cellulose or wool and the process provides a crease-resistant, stiffened or shrink-resistant finish or may be employed in the fixation of mechanical effects, e.g. glazing or embossing, for the improvement of colour fastness of direct dyes and for pigment printing. The treating composition is said to enhance the effects of daylight fluorescent dyestuffs which may be included therein. The aminoaldehyde condensate may be prepared from urea, thiourea or melamine and formaldehyde. The molecular ratio of formaldehyde to urea may be more than 1.6 to 1. The ester condensation product has hydrophilic groups and may be obtained by reacting sebacic, maleic, succinic or phthalic acid or anhydride or a fatty acid derived from a vegetable or animal oil or an amino or hydroxy acid with a glycol or polyglycol. Mixtures of acids or alcohols may be used. In examples, condensates of polyethylene glycol, M.W.400, and maleic anhydride in equimolecular amounts having an acid number of 55 to 65, of polyethylene glycol and a mixture of maleic anhydride and linseed oil fatty acid, of polyethylene glycol and a mixture of succinic and fumaric acids, having an acid value of 23, of triethylene glycol and a mixture of succinic acid and phthalic anhydride having an acid value of 90 and of polyethylene glycol and acetic acid are included in solutions with urea-formaldehyde and ammonium dihydrogen phosphate. In one example the solution is stabilized with hexamethylenetetramine. In another example the composition contains a pigmented dye and a water-soluble cellulose derivative thickener. Textile fabrics are treated with these solutions, mangled, dried on stenters, in some cases using superheated steam at 100 DEG C., and are baked, e.g. at 140 DEG C. The second Provisional Specification describes in Example (4) the treatment of cotton with a composition comprising urea-formaldehyde pre-condensate and condensation product of ethylene diamine and succinic anhydride.ALSO:Organic textile materials are treated with an aqueous solution containing an intermediate condensation product of an aminoaldehyde resin, an acidic catalyst for further condensing the resin and a condensation product of a polyhydric alcohol and a mono- or poly-carboxylic acid or of a monohydric alcohol and a polycarboxylic acid, and thereafter the fibres are dried and heated to form the aminoaldehyde resin. In a modification, the aminoaldehyde and the condensation product are applied separately. The textile materials treated may be fibres, threads, yarns, fabrics or felts of cotton, linen, regenerated cellulose or wool and the process provides a crease-resistant, stiffened or shrink-resistant finish or may be employed in the fixation of mechanical effects, e.g. glazing or embossing, for the improvement of colour fastness of direct dyes and for pigment printing. The treating composition is said to enhance the effects of daylight fluorescent dyestuffs which may be included therein. The aminoaldehyde condensate may be prepared from urea, thiourea or melamine and formaldehyde. The molecular ratio of formaldehyde to urea may be more than 1.6 to 1. The ester condensation product has hydrophilic groups and may be obtained by reacting sebacic, maleic, succinic or phthalic acid or anhydride or a fatty acid derived from a vegetable or animal oil or an amino or hydroxy acid with a glycol or polyglycol. Mixtures of acids or alcohols may be used. In examples, condensates of polyethylene glycol, M.W. 400, and maleic anhydride in equimolecular amounts having an acid number of 55 to 65, of polyethylene glycol and a mixture of maleic anhydride and linseed oil fatty acid, of polyethylene glycol and a mixture of succinic and fumaric acids, having an acid value of 23, of triethylene glycol and a mixture of succinic acid and phthalic anhydride having an acid value of 90 and of polyethylene glycol and acetic acid are included in solutions with urea formaldehyde and ammonium dihydrogen phosphate. In one example, the solution is stabilized with hexamethylenetetramine. In another example the composition contains a pigmented dye and a water-soluble cellulose derivative thickener. Textile fabrics are treated with these solutions, mangled, dried on stenters, in some cases using superheated steam at 100 DEG C., and are baked, e.g. at 140 DEG C. The second Provisional Specification describes in Example (4) the treatment of cotton with a composition comprising ureaformaldehyde pre-condensate and condensation product of ethylene diamine and succinic anhydride.