Patent GB-1105250-A (GB)
Title: Improvements in the treatment of cellulosic fabrics
IPC: D06M15/568
Filed: 1967-02-15
Abstract: Compounds suitable for use in the treatment of cellulosic fabrics are produced by the reaction of formaldehyde with an alkoxyalkyl carbamate of the formula <FORM:1105250/C3/1> in which R is an alkyl group of 1-8 carbon atoms, R1 is an alkylene radical of 2 or 3 carbon atoms and n is an integer of 1-10, prepared by the reaction of urea with a glycol ether of the formula R-O-(R1-O)n-H, in a mole ratio of 1.5-3 moles of formaldehyde per mole of alkoxyalkyl carbamate at a temperature of 20 DEG  C. to the reflux temperature of the reaction mixture for from 10 minutes to 24 hours, the reaction mixture having an initial pH of 4-10. The compounds may be applied to the fabrics as aqueous solutions which may also contain a catalyst, e.g. zinc fluoroborate or nitrate or magnesium chloride, plasticizer, surfactant, softening agent, e.g. emulsified polyethylene wax, or a hand builder, the fabrics subsequently being dried and cured at 150-200 DEG  C. for 1-5 minutes.ALSO:Compounds suitable for use in the treatment of cellulosic fabrics are produced by the reaction of formaldehyde with an alkoxyalkyl carbamate of the formula <FORM:1105250/C2/1> in which R is an alkyl group of 1-8 carbon atoms, R1 is an alkylene radical of 2 or 3 carbon atoms and n is an integer of 1-10, prepared by the reaction of urea with a glycol ether of the formula R-O-(R1-O)n-H, in a ratio of 1.5-3 moles of formaldehyde per mole of alkoxyalkyl carbamate at a temperature of 20 DEG  C. to the reflux temperature of the reaction mixture for from 10 minutes to 24 hours, the reaction mixture having an initial pH of 4-10.ALSO:Cellulosic fabrics are crease proofed and shrinkproofed by treating them with an aqueous solution containing the product of the reaction of formaldehyde with an alkoxyalkyl carbamate of the formula <FORM:1105250/D1-D2/1> in which R is an alkyl group of 1-8 carbon atoms, R' is an alkylene radical of 2 or 3 carbon atoms and n is an integer of 1-10, and drying and curing them, the product being applied to the fabric in an amount of 1-30% by weight based on the weight of the fabric.  The reaction product may be produced by the reaction of formaldehyde and the alkoxy alkyl carbamate in a ratio of 1.5-3 moles of formaldehyde per mole of alkoxyalkyl carbamate at a temperature of from 20 DEG C to the reflux temperature of the reaction mixture for from 10 minutes to 24 hours, the reaction mixture having an initial pH of from 4-10.  The reaction product may be applied to the fabric as an aqueous solution containing 2-25% by weight of the reaction product by dipping or padding, the wet pick-up of the fabric being adjusted to 50-120% by weight so the amount of the reaction product applied to the fabric is 1-30% by weight and the fabric then dried at temperatures of up to 150 DEG C and cured at 150 DEG -200 DEG C for 1-5 minutes, optionally after making it up into a garment.  The treating solution may also contain a catalyst, e.g. zinc fluoborate or nitrate or magnesium chloride, plasticizer, surfactant, softening agent, e.g. emulsified polyethylene wax, or hand builder.  Fabrics comprising cotton, linen or viscose rayon fibres alone or in admixture with noncellulosic fibres may be treated.