Resinous condensation products

Acetal condensation products are obtained by reacting a water-soluble or water-dispersible formaldehyde resin precondensate with a water-soluble or water-dispersible polyacetal derived from an aldehyde containing less than 10 C atoms and a polyethenoxy compound containing at least 2-OH groups. The precondensates are derived by interaction of H.CHO with a compound containing the group -CNH2 or the group where X is O, S or NH, e.g. urea/formaldehyde and melamine/formaldehyde condensates, dimethylol urea, trimethylolmelamine, hexmethylol melamine, dimethylolethylene urea, 1:3-dimethylol -5- -(b -hydroxyethyl)-hexahydrotriazin-2-one, the dimethylol derivative of glyoxal monoureide, the tetramethylol derivative of glyoxal diureide, the corresponding ethyl ethers and water-soluble or water-dispersible condensation products. The polyacetals used may be made by known methods, e.g. as described in U.S.A. Specification 2,968,581, from aldehydes, e.g. formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and glyoxal, and polyethenoxy compounds such as polyoxyethylene glycols, ethylene oxide condensates of glycerol and their monoesters with fatty acids, ethylene oxide condensates of primary amines and their derived quaternary ammonium salts, and ethylene oxide condensates of triethanolamine. The reaction between the precondensate and polyacetal, usually in amount of from 0.1 to 5 pts. of the former per part (by wt.) of the latter, is effected by heating, preferably in the presence of an acid-reacting catalyst, e.g. ammonium chloride, ammonium thiocyanate or zinc nitrate. Examples 1, 4, 5 and 6 describe the preparation of the polyacetals and Examples 2, 3, 7 and 8 describe the preparation of the polyacetal condensation products in situ on synthetic fibres (see Division D1).ALSO:Antistatic properties are conferred on textile materials by forming an actual condensation product in situ, e.g. by impregnating the textile material with an aqueous solution or dispersion of the corresponding reactants and an acid-reacting catalyst, drying and baking, e.g. at 100 DEG to 210 DEG C., the impregnated material to insolubilize the resin. The actual condensation product is made from a water-soluble or-dispensible formaldehyde resin pre-condensate (viz. an aminoplast pre-condensate) and a water soluble or-dispersible polyacetal derived from an aldehyde containing less than 10 C atoms and a polyethenoxy compound containing at least 2-OH groups (see Division C3)