MISTURAS DE SUBSTANCIAS ATIVAS ISENTAS DE SILICATO E MAGNESIO E PROCESSO PARA ALVEJAMENTO DE FIBRAS DE CELULOSE

摘要

Silicate- and magnesium-free stabilizer mixtures for stabilizing aqueous peroxide bleaching baths based on organic acids and/or salts thereof comprising: (A) polyhydroxy and/or hydroxycarboxylic acids, and their alkali metal and/or ammonium salts; (B) polyacrylic acids, and their partially neutralized form; and (C) polyamine and/or amine polyphosphonic acids, and their alkali metal and/or ammonium salts; (D) 35% hydrogen peroxide solution with the proviso that the ratio by weight of components A:B:C is 1 to 6:0.2 to 1:0.4 to 4.