Process of improving the dyeing properties of cellulose, cellulose esters and esters by reaction with a carbodiimide compound employing a copper salt catalyst

Claim 1

IN A PROCESS FOR IMPROVING THE PROPERTIES OF A CELLULOSE COMPOUND HAVING FREE AND REACTIVE HYDROXYL GROUPS AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF NATIVE CELLULOSE, REGENERATED CELLULOSE, A CELLULOSE ESTER AND A CELLULOSE ETHER, THE STSEP OF CONTACTING SAID COMPOUND WITH A SOLUTION CONTAINING (1) A CATALYTIC AMOUNT OF A COPPER SALT SELECTED FROM THE GROUP CONSISTING OF CUPROUS CHLORIDE, CUPRIC CHLORIDE, CUPROUS SULFATE, CUPRIC SULFATE, AND CUPROUS ACETATE AND (2) AN ORGANIC CARBODIMIDE SELECTED FROM THE GROUP CONSISTING OF DISOPROPYL-CARBODIIMIDE, N-BUTYL-CYCLOHEXYL-CARBODIIMIDE, DICYCLOHEXYLCARBODIIMIDE, METHYL-TERT-BUTYL-CARBODIIMIDE, TERT-BUTYCYCLOHEXYL-CARBODIIMIDE, CYCLOHEXYL-PHENYL-CARBODIIMIDE, TERT-BUTYL-PHEMYL-CARBODIIMIDE AND DIPHENYL-CARBODIIMIDE, SAID REACTION BEING CONDUCTED AT A TEMPERATURE UP TO ABOUT 100* C, UNTIL AN ANIMALIZED PRODUCT IS OBTAINED WHICH IS DYEABLE WITH ACID DYESTUFF.