Patent GB-936993-A (GB)
Title: Catalyst and process for the heat curing of fabric
IPC: D06M15/39
Filed: 1959-09-22
Abstract: Catalysts for heat curing of fabric which has been treated with an aldehydic textile finishing agent comprise (i) an acid and (ii) a normal salt of polyvalent metal or metal-oxygen group.  The acid has an acidity at least equal to that of a 0,1% citric acid solution and the catalyst is characterized in that heating it during curing will form a residue of lower acidity than that of the catalyst prior to heating.  Specified catalyst components are:-(i) maleic, tartaric, hydrochloric, phosphoric, citric, itaconic and succinic acids or anhydrides and (ii) magnesium nitrate, strontium nitrate, aluminium chloride, zinc chloride, zirconium oxychloride, aluminium acetate and chromium acetate.  In examples, a pure cotton was treated with an aqueous solution containing an aldehydic finishing agent, citric acid and magnesium nitrate with or without strontium nitrate.ALSO:Catalysts for heat curing of fabric which has been treated with an aldehydic textile finishing agent comprise (i) an acid and (ii) a normal salt of polyvalent metal or metal-oxygen group.  The acid has an acidity at least equal to that of a 0,% citric acid solution and the catalyst is characterized in that heating it during curing will form a residue of lower acidity than that of the catalyst prior to heating.  Specified catalyst components are:- (i) maleic, tartaric, hydrochloric, phosphoric, citric, itaconic and succinic acids or anhydrides and (ii) magnesium nitrate, strontium nitrate, aluminium chloride, zinc chloride, zirconium oxychloride, aluminium acetate and chromium acetate. Specified aldehydic finishing agents are:- methylolureas, methylolmelamines, dimethylol ethyleneurea, tetramethylol diacetyleneurea, methyloltriazones, the corresponding methylated methylol resins and hydroxy-substituted-alkylenemethylolureas such as dihydroxy dimethylol ethylene urea.  In examples, a pure cotton was treated with one of the aqueous solutions containing the following ingredients and subsequently dried and cured for 3 minutes at 300 DEG F. or for 5 minutes at 240 DEG F.:- (1) formaldehyde, citric acid, strontium and magnesium nitrates; (2) as (1) without strontium nitrate; (3) as (1) replacing formaldehyde with dimethylol ethyleneurea; (4) as (3), using the catalyst of (2); (5) as (3) and (4), replacing dimethylol ethyleneurea with methylated methylolmelamine; (6) as (1), replacing formaldehyde with a methylol triazone; (7) as (1), replacing formaldehyde with a methylolacetone resin precondensate.ALSO:Catalysts for heat curing of fabric which has been treated with an aldehydic textile finishing agent comprise (i) an acid and (ii) a normal salt of polyvalent metal or metal-oxygen group.  The acid has an acidity at least equal to that of a 0,1% citric acid solution and the catalyst is characterized in that heating it during curing will form a residue of lower acidity than that of the catalyst prior to heating.  Specified catalyst components are:-(i) maleic, tartaric, hydrochloric, phosphoric, citric, itaconic and succinic acids or anhydrides and (ii) magnesium nitrate, strontium nitrate, aluminium chloride, zinc chloride, zirconium oxychloride, aluminium acetate and chromium acetate. Specified aldehydic finishing agents are:-formaldehyde, glyoxal, acetaldehyde, chloral, benzaldehyde, furfural, methylol ketones, paraformaldehyde, trioxane, methylolureas, methylolmelamines, dimethylol ethyleneurea, tetramethylol diacetyleneurea, methylol triazones, the corresponding methylated resins and hydroxy-substituted-alkylenemethylolureas such as dihydroxy dimethylol ethylene urea.  In examples, a pure cotton was treated with one of the aqueous solutions containing the following ingredients and subsequently dried and cured for 3 minutes at 300 DEG F. or for 5 minutes at 240 DEG F.:-(1) formaldehyde citric acid, strontium and magnesium nitrates; (2) as (1) without strontium nitrate; (3) as (1) replacing formaldehyde with dimethylol ethyleneurea; (4) as (3), using the catalyst of (2); (5) as (3) and (4), replacing dimethylol ethyleneurea with methylated methylolmelamine; (6) as (1), replacing formaldehyde with a methylol triazone; (7) as (1), replacing formaldehyde with a methylolacetone resin precondensate.