A water-reducing admixture for use in preparing a hydraulic composition comprising I. 95 to 50% by weight of a water-soluble sulfonate and Ii. 5 to 50% by weight of a water-soluble copolymer, said water-soluble sulfonate (I) being selected from the group consisting of A. a water-soluble salt of a sulfonated aromatic hydrocarbon, B. a water-soluble sulfonate, and C. a water-soluble salt of sulfonated melamine resins.
A polyamide fibrous substrate having deposited on it an amount of a composition effective to impart stain-resistance comprising a water-soluble or water-dispersible alpha-olefin/maleic anhydride polymer or a mixture of said polymers, and processes for preparing the substrates. The maleic anhydride polymer is used either in hydrolyzed form or in the form resulting from reacting it with a lower alkyl alcohol so as to form an alpha-olefin/maleic acid monalkyl ester polymer.