Use of novolak derivatives in the dyeing of polyester-cellulose blend fabrics and processes for the continuous dyeing of such blend fabrics

A process for preventing soiling of the cellulose portion of polyester-cellulose blend fabrics in the dyeing and printing of said fabrics, comprising applying to said fabrics in the dyeing and printing process compounds of the general formula I, ##STR3## in which Ar represents radicals derived from benzene or naphthalene, or a mixure thereof;

• the radicals X, which are independent from one another, can be identical or different and represent ethylene groups or methylethylene groups, or a mixture thereof;
• the radicals A, which are independent of one another, in part represent benzoyl or naphthoyl, or a mixture thereof, in another part represent --CO--CH.dbd.CH--CO.sub.2 M or --CO--CH.sub.2 --CH(SO.sub.3 M)--CO.sub.2 M, or a mixture thereof, and in any remaining part represent hydrogen, the radicals M, independently of one another, representing hydrogen or metal equivalents or substituted or unsubstituted ammonium groups, or any mixture thereof;
• R.sup.1, R.sup.2 and R.sup.3, independently of one another, represent hydrogen or alkyl having 1 to 14 C atoms, or a mixture thereof;
• the radicals R represent hydrogen or alkyl having 1 to 9 C atoms, or a mixture thereof;
• m is a number from about 2 to about 12;
• and
• each n, which can be identical or different from the others, represents a number from 1 to about 150;
• the compounds of the general formula I being present in padding liquors or baths or printing pastes which are used anyway in the dyeing and printing process, or being applied to the fabric by means of a separate liquor or in a separate bath.