Abstract: D-Isoascorbic acid or one of its salts, as such or as a constituent of a liquid or solid formulation, is an effective agent for reducing the amount of Cr(VI) compounds in leathers tanned with Cr(III) salts by treatment of the leather in an aqueous liquor after tanning or finishing or of a commodity article with an aqueous solution.

Abstract: D-Isoascorbic acid or one of its salts, as such or as a constituent of a liquid or solid formulation, is an effective agent for reducing the amount of Cr(VI) compounds in leathers tanned with Cr(III) salts by treatment of the leather in an aqueous liquor after tanning or finishing or of a commodity article with an aqueous solution.

Abstract: Compositions comprising a mineral oil or wax and a liquid polysiloxane substituted by functional groups, an anionic surfactant and additionally a molecular mono- or polycarboxylic acid and optionally any emulsifiable, hydrophilic or amphiphilic polymer comprising carboxyl groups are outstanding water repellents for leather, furskins, textiles and fibrous materials.

Abstract: Compositions comprising a mineral oil or wax and a liquid polysiloxane substituted by functional groups, an anionic surfactant and additionally a molecular mono- or polycarboxylic acid and optionally any emulsifiable, hydrophilic or amphiphilic polymer comprising carboxyl groups are outstanding water repellents for leather, furskins, textiles and fibrous materials.

Abstract: A process is disclosed for waterproofing materials having a fibrous structure, such as leather, persian leather or leather replacement materials, by using waterproofing agents containing sulfosuccinic acid esters. Also disclosed are waterproofing agents used to carry out this process. The sulfosuccinic acid esters are prepared by reacting maleic anhydride with monohydric or polyhydric alcohols, then by sulfitizing them. Reactive siloxanes may also be used as polyhydric alcohols.

Abstract: The present invention relates to anhydrous and water-containing agents for waterproofing leathers and furs, which comprise a silicone and as emulsifier an alkyl polyalkylol ether carboxylic acid and/or an alkylaryl polyalkylol ether carboxylic acid and/or one of their alkali, alkaline earth, ammonia, amine, or alkanolamine salts. The present invention further relates to the use of these agents for waterproofing, preferably in retanning or afterwards. Subsequent to the waterproofing, an aftertreatment using metallic salts of bito tetravalent cations may be carried out.

Abstract: The present invention relates to copolymers built up of a) 20-60%-wt. ethylenically unsaturated acid-groups-comprising monomers, b) 40-80%-wt. ethylenically unsaturated glycerol derivatives in which one hydroxyl group of the glycerol is unsubstituted, one hydroxyl group is etherified with (meth)-allyl alcohol and the third hydroxyl group is etherified with a C.sub.12 -C.sub.24 -alcohol or C.sub.12 -C.sub.24 -alkyl phenol or esterified with a C.sub.12 -C.sub.40 -monocarboxylic acid and c) 0-30%-wt. other ethylenically unsaturated monomers copolymerizable with the monomers a) and b), whereby the sum of the monomers a+b+c=100. The present invention further relates to the use of said copolymers for the softening of leather. The copolymers according to the present invention result in an improved exhaustion during the leather treatment.