Dyeing of cellulose acetate with acid dyes in an aqueous solution containing a mixture of swelling agents

Claim 2

METHOD OF DYEING CELLULOSE ACETATE WITH AN ACID DYE COMPRISING THE STEP OF TREATING THE ACETATE WITH AN AQUEOUS DYEBATH CONSISTING OF WATER, AND ACID DYE, FROM 10 TO 35 VOLUMEN PERCENT OF A LOWER ALIPHATIC ALCOHOL AS PRIMARY DYEING ASSISTANT, AND FROM 1 TO 6 PERCENT BY WEIGHT OF AN AUXILIARY DYEING ASSITANT SELECTED FROM THE GROUP CONSISTING OF RESORCINOL, PHLOROGLUCINOL, AND CYCLOHEXANOL.

Claim 3

METHOD OF DYEING CELLULOSE ACETATE WITH AN ACID DYE COMPRISING THE STEP OF TRETING THE ACETATE WITH AN AQUEOUS DYEBATH CONTAINING AN ACID DYE, AN ESTER OF AN ALCOHOL WITH AN ORGANIC ACID AS PRIMARY DYEING ASSISTANT, AND AN AUXILIARY DYEING ASSISTANT SELECTED FROM THE GROUP CONSISTING OF RESORCINOL, PHLOROGLUCINOL, AND CYCLOHEXANOL, THE CONCENTRATION OF THE ESTER IN THE BATH BEING LESS THAN ONE-HALF THE CONCENTRATION THEREOF REQUIRED TO FACILITATE DYEING OF THE ACETATE WITH THE ACID DYE FROM AQUEOUS SOLUTION UNDER CORRESPONDING DYEING CONDITIONS IN THE ABSENCE OF THE AUXILIARY ASSISTANT.

Claim 4

METHOD OF DYEING CELLULOSE ACETATE WITH AN ACID DYE COMPRISING THE STEP OF TRETING THE ACETATE WITH AN AQUEOUS DYEBATH CONTAINING AN ACID DYE, AN ESTER OF AN ALCOHOL WITH AN ORGANIC ACID AS PRIMARY DYEING ASSISTANT, AND AN AUXILIARY DYEING ASSISTANT SELECTED FROM THE GROUP CONSISTING OF RESORCINOL, PHLOROGLUCINOL, AND CYCLOHEXANOL, THE CONCENTRATION OF THE ESTER IN THE BATH BEING LESS THAN ONE-HALF THE CONCENTRATION THEREOF REQUIRED TO FACILITATE DYEING OF THE ACETATE WITH THE ACID DYE FROM AQUEOUS SOLUTION UNDER CORRESPONDING DYEING CONDITIONS IN THE ABSENCE OF THE AUXILIARY ASSISTANT.

Claim 5

METHOD OF DYEING CELLULOSE ACETATE WITH AN ACID DYE COMPRISING THE STEP OF TREATING THE ACETATE WITH AN AQUEOUS DYEBATH CONTAINING AN ACID DYE, AND ACID AS PRIMARY DYEING ASSISTANT, AND AN AUXILIARY DYEING ASSITANT SELECTED FROM THE GROUP CONSISTING OF RESORCINOL, PHLOROGLUCINOL, AND CYCLOHEXANOL, THE CONCENTRATION OF THE ACID DYEING ASSISTANT IN THE BATH BEING LESS THAN ONEHALF THE CONCENTRATION THEREOF REQUIRED TO FACILITATE DYEING OF THE ACETATE WITH THE ACID DYE FROM AQUEOUS SOLUTION UNDER CORRESPONDING DYEING CONDITIONS IN THE ABSENCE OF THE AUXILIARY DYEING ASSISTANT.

Claim 6

METHOD OF DYEING CELLULOSE ACETATE WITH AN ACID DYE COMPRISING THE STEP OF TREATING THE ACETATE WITH AN AQUEOUS DYEBATH CONTAINING AN ACID DYE, AND ACID AS PRIMARY DYEING ASSISTANT, AND AN AUXILIARY DYEING ASSITANT SELECTED FROM THE GROUP CONSISTING OF RESORCINOL, PHLOROGLUCINOL, AND CYCLOHEXANOL, THE CONCENTRATION OF THE ACID DYEING ASSISTANT IN THE BATH BEING LESS THAN ONEHALF THE CONCENTRATION THEREOF REQUIRED TO FACILITATE DYEING OF THE ACETATE WITH THE ACID DYE FROM AQUEOUS SOLUTION UNDER CORRESPONDING DYEING CONDITIONS IN THE ABSENCE OF THE AUXILIARY DYEING ASSISTANT.