Method of finishing synthetic organic fibrous material, in particular of providing it with an antistatic finish

A method of providing synthetic organic fibrous material with an antistatic and dirt repellent finish which comprises treating said material with an aqueous or organic solution or emulsion containing 1-30 percent by weight of a composition consisting essentially of a 75 to 100 percent by weight of a copolymer having a molecular weight between about 2,000 and 50,000 of at least two monomers in a ratio of about 1:10 to 10:1 and of the formulae ##STR43## or mixtures of such copolymers wherein

• R is straight-chain or branched alkyl of 1 to 8 carbon atoms,
• R.sub.1 is hydrogen or methyl,
• R.sub.2 is alkyl of 1 to 6 carbon atoms,
• m is an integer from 6 to 15 and each of r and s is 1 or 2;
• or said copolymer of at least two of (1), (2) and (3) containing an additional monomer in a ratio of about 1:10 to 10:1 and selected from the group consisting of vinyl esters of organic acids, vinyl alkyl ketones, vinyl halides, acrylic nitrile or acrylic amide and derivatives thereof, which are substituted at the amide nitrogen and .alpha.,.beta.-unsaturated mono - or dicarboxylic acids containing 3 to 5 carbon atoms and esters thereof;
• and
• b.25 to 0 percent by weight of at least one of
• b.sub.1. a homopolymer of (1), (2) or (3) having a molecular weight of about 2,000 to 50,000;
• b.sub.2. a homopolymer or copolymer of vinyl esters of organic acids, vinyl alkyl ketones, vinyl halides, acrylic nitrile or acrylic amide or derivatives thereof which are substituted at the amide nitrogen, or .alpha.,.beta.-unsaturated mono- or dicarboxylic acids containing 3 to 5 carbon atoms or esters thereof, and having a molecular weight between about 2,000 and 50,000;
• b.sub.3. a compound of the formula ##STR44## wherein R' is straight-chain or branched alkyl of 1 to 18 carbon atoms, R.sub.1 is hydrogen or methyl, R.sub.2 ' is hydrogen or C.sub.n H.sub.2n+1
• and n is an integer from 1 to 24;
• and b.sub.4. a compound of the formula ##STR45## wherein R" is ##STR46## wherein A is --CH.sub.2 CH.sub.2 --,--CH=CH-- or ##STR47## R.sub.3 ' is hydrogen or C.sub.n H.sub.2n+1 and n is an integer from 1 to 24.