Patent GB-952875-A (GB)
Title: Improvements in or relating to the treatment of cellulosic textiles
IPC: C08L61/32
Filed: 1960-06-21
Abstract: A composition suitable for use in the creaseproofing of cellulosic textile materials comprises an aqueous solution containing (1) formaldehyde, (2) the reaction product of formaldehyde and a triazane of the formula: <FORM:0952875/C3/1> in which R and R1 are the same or different and are hydrogen, an alkyl group containing 1-5 carbon atoms or a hydroxyalkyl group containing 1-5 carbon atoms and (3) a formaldehydehydrazide reaction product comprising (a) the reaction product of formaldehyde and a monohydrazide produced by the reaction of a monohydrazide of the formula: RCONHNH R1 in which R is hydrogen, an alkyl group containing 1-8 carbon atoms or an alkyl group containing 1-8 carbon atoms substituted by hydroxyl or sulphydril groups and R1 is hydrogen or <FORM:0952875/C3/2> , and formaldehyde in a molar ratio of formaldehyde to hydrazide of from 3:1 to 10:1 and/or (b) the reaction product of formaldehyde and a dihydrazide produced by the reaction of a dihydrazide of the formula R(CONHNH1 2)2 in which R is (-CH2)n in which n is 0 to 5, or an alkylene group containing 2-6 carbon atoms interrupted by 1-2 atoms of oxygen or sulphur, and formaldehyde in a molar ratio of formaldehyde to dihydrazide of from 6:1 to 20:1, the total amount of the ingredients in the solution being 5-75% by weight and the proportions of the ingredients being 1-20 moles of formaldehyde, 0.5-8 moles of formaldehyde-triazane reaction product and 1 mole of formaldehyde-hydrazide reaction product. The solution which may have a pH of about 2-5 may also contain 0.2-5% by weight of a catalyst comprising a mixture of magnesium chloride and citric or maleic acid or a mixture thereof in which the relative proportion of magnesium chloride to acid is from 75:25 to 25:75 by weight. After the application of the solution to the textile material the material may be dried and the composition cured by heating to a temperature of 150 DEG -200 DEG C. for 1/2 -10 minutes or at a temperature above 200 DEG C. for 15-60 seconds.  Specifications 882,998 and 884,673 are referred to.ALSO:A catalytic composition comprises a mixture of magnesium chloride and citric or maleic acid or a mixture thereof, in which the relative proportion of magnesium chloride to the acid is from 75 : 25 to 25 : 75 by weight.  Specifications 882,998 and 884,673 are referred to.ALSO:Natural and regenerated cellulose textile materials, e.g cotton, linen and viscose or cuprammonium rayon, are creaseproofed by impregnating them with a aqueous solution containing (1) formaldehyde, (2) the reaction product of formaldehyde and a triazane of the formula <FORM:0952875/D1-D2/1> in which R and R1 are the same or different and are hydrogen, and alkyl group containing 1-5 carbon atoms or a hydroxy alkyl group containing 1-5 carbon atoms and (3) a formaldehyde-hydrazide reaction product comprising (a) the reaction product of formaldhyde and a monohydrazide produced by the reaction of the monohydrazide of the formula RCo NH NHR1 in which R is hydrogen, an alkyl group containing 1-8 carbon atoms or an alkyl group containing 1-8 carbon atoms substituted by hydroxyl or sulphydril groups and R1 is hydrogen or <FORM:0952875/D1-D2/2> , and formaldehyde in a motor ratio of formaldehyde to hydrazide of from 3 : 1 to 10 : 1 and/or (6) the reaction product of formaldehyde and a dihydrazide produced by the reaction of a dihydrazide of the formula R(CONHN H2)2 in which R is (-CH2-)n in which n is 0 to 5, or an alkylene group containing 2-6 carbon atoms interrupted by 1-2 atoms of oxygen or sulphur, and formaldehyde in a motor ratio of formaldehyde to dihydrazide of from 6 : 1 to 20 : 1, the total amount of the ingredients in the solution being 5-75% by weight and the proportions of the ingredients being 1-20 moles of formaldehyde, 0.5-8 moles of formaldehyde-triazone reaction product and 1 mole of formaldehyde-hydrazide reaction product, and then heating them to effect driping and curing.  The treating solution may also contain 0.2-5% by weight of a catalyst comprising a mixture of magnesium chloride and citric or maleic acid or a mixture thereof in which the relative proportion of magnesium chloride to acid is from 75 : 25 to 25 : 75 by weight.  The treating solution may have a pH of about 2-5 and drying and curing may be carried out at a temperature of 150 DEG -200 DEG C. for 1/2 -10 minutes or at a temperature above 200 DEG C. for 15-60 seconds.  The textile materials may subsequently be given an alkaline scour and subjected to normal finishing operations, e.g. calendering, framing, blueing and compressive shrinking.  Specifications 882,998 and 884,673 are referred to.