Abstract: The invention relates to a synergistically active composition which comprises a mixture of a sulfinic acid or a salt thereof and ascorbic acid or a salt thereof and the use of the composition as reducing agent. The reducing power of the composition of the invention is significantly higher than the reducing power of the single components.

Abstract: The preparation and use of mixed salts of hydroxyalkane sulfinic acids and optionally hydroxyalkane sulfonic acids as a reducing agent are disclosed. The reducing power of the salts is significantly higher than the reducing power of the corresponding zinc salt. The storage stability of the salts as solids and as aqueous solution is significantly higher than one of the corresponding sodium salts.

Abstract: A sulfonic acid salt composition includes compounds of formula (I), wherein n is 1 or 2, R1 is H or C1-C6 alkyl, R2 is COOM, SO3M or CH(OH)SO2—OM, each M is an equivalent of a multivalent metal, preferably magnesium, calcium, aluminum, zinc and combinations thereof. The molar ratio of a compound wherein n is 1 to a compound wherein n is 2 is below 0.1. The sulfonic acid salt composition is useful for color stabilization of non-living organic matter such as from lacquers, paints, powder-coatings, and polymers in particular water-absorbent polymers.

Abstract: A sulfonic acid salt composition includes compounds of formula (I), wherein n is 1 or 2, R1 is H or C1-C6 alkyl, R2 is COOM, SO3M or CH(OH)SO2-OM, each M is an equivalent of a multivalent metal, preferably magnesium, calcium, aluminum, zinc and combinations thereof. The molar ratio of a compound wherein n is 1 to a compound wherein n is 2 is below 0.1. The sulfonic acid salt composition is useful for color stabilization of non-living organic matter such as from lacquers, paints, powder-coatings, and polymers in particular water-absorbent polymers.

Abstract: The preparation and use of mixed salts of hydroxyalkane sulfinic acids and optionally hydroxyalkane sulfonic acids as a reducing agent are disclosed. The reducing power of the salts is significantly higher than the reducing power of the corresponding zinc salt. The storage stability of the salts as solids and as aqueous solution is significantly higher than one of the corresponding sodium salts.

Abstract: The present invention concerns an additive for the controlled viscosity adjustment of polycondensates, comprising an acid and/or acid anhydride and a carrier, preferably a polymeric carrier, characterized in that the acid and/or the acid anhydride is uniformly distributed in the carrier, a process for preparing the additive, a process for the controlled viscosity adjustment of polycondensates and the use of the additive for the controlled viscosity adjustment of polycondensates.

Abstract: This invention concerns a process for the long-term stabilization of polyamides and the use of a specific additive composition for the long-term stabilization of polyamides.