Patent GB-862197-A (GB)
Title: Processes for waterproofing textiles or the like
IPC: D06M15/39
Filed: 1959-02-19
Abstract: Water-proofing effects on textiles, leather or paper, fast to cleaning, are produced by treatment with bath liquors containing heathardenable polysiloxanes of the formula <FORM:0862197/IV (a)/1> wherein R or R1 is hydrogen, alkyl, aryl, cycloalkyl or acyl, x+y is a number between 1.5 and 3, x and y are each between 0 and 3, and n is a number greater than 1, condensation agents for the polysiloxanes, and condensation products, which are soluble in organic solvents or water or dilute acids and obtained from aminoplast-forming N-compounds, e.g. urea, thiourea or melamine, and formaldehyde, aliphatic monocarboxylic acids (more than 10 C-atoms) and/or resinic acids, and alkanolamines.  The treatment may be by immersion in a single bath containing the ingredients in aqueous emulsion, or by successive immersion in an aqueous solution of the condensation product and in an aqueous emulsion of the polysiloxane and its condensation agent.  The materials may be crease-proofed concurrently by the use of known hardenable pre-condensates, e.g. dimethylol-urea, and hardening agents therefor.  The condensation agent for the polysiloxane may be a salt or soap of a polyvalent metal, e.g. zirconium, or a water-soluble complex compound of the Werner type in which a trivalent nuclear chromium atom is co-ordinated with an acyclic carbocyclic group, prepared according to U.S.A.  Specification 2,273,040.  The Specification also describes for purposes of comparison, treatments with: (1) silicone and hardener therefor, (2) the above condensation product containing paraffin wax and hardener, (3) the above condensation product containing paraffin wax, silicone and hardener, and (4) the above condensation product and hardener only.  Specification 748,016 also is referred to.ALSO:A condensation product is obtained by melting stearic acid, dissolving it in methanol, adding melamine and formaldehyde in portions while stirring, heating slowly for three hours up to 110 DEG  C., distilling off the methanol, heating for a further 45 minutes up to 130 DEG  C., adding triethanolamine and heating for 10-20 minutes.  The Specification also refers to similar condensation products from (1) stearic acid, methanol, melamine, paraformaldehyde and triethanolamine; (2) resinic acid, urea, paraformaldehyde and propanolamine in ethyl alcohol; and (3) generally from anioplast-forming N-compounds, formaldehyde, aliphatic monocarboxylic acids having more than ten C-atoms (saturated or unsaturated) and/or resinic acids, or the anhydrides or chlorides of such acids, and alkanolamines which may be monoto tri-alkanolamines.  The products are soluble in organic solvents or water or dilute acids, and are used in waterproofing compositions (see Group VIII).  Specification 748,016 and U.S.A. Specification 2,273,040 is referred to.ALSO:Water-proofing effects on textiles, e.g. cotton, wool and synthetic polyamide fibres, fast to cleaning, are produced by treatment with bath liquors containing heat-hardenable polysiloxanes of the formula:- <FORM:0862197/IV(c)/1> wherein R or R1 is hydrogen, alkyl, aryl, cycloalkyl or acyl, x+y is a number between 1,5 and 3, x and y are each between 0 and 3, and n is a number greater than 1, condensation agents for the polysiloxanes, and condensation products which are soluble in organic solvents or water or dilute acids and obtained from aminoplastforming N-compounds, e.g. urea, thiourea or melamine, and formaldehyde, aliphatic monocarboxylic acids (more than 10 C-atoms) and/or resinic acids, and alkanolamines.  The treatment may be by immersion in a single bath containing the ingredients in aqueous emulsion, or by successive immersion in an aqueous solution of the condensation product and in an aqueous emulsion of the polysiloxane and its condensation agent.  The materials may be crease-proofed concurrently by the use of known hardenable pre-condensates, e.g. dimethylol-urea, and hardening agents therefor. Specification 748,016 and U.S.A. Specification 2,273,040 is referred to.