The Studies on Application of Acrylic Acid-maleic Anhydride Copolymer in Basic Phosphate-free Detergent

After phosphate-prohibition in detergent,the detergency of detergent becomes lower ,but other basic builders, such as sodium silicate, sodium carbonate and 4A-zeolite can promote pH value and add to ash deposition.This paper studies the application of acrylic acid-maleic anhydride copolymer in basic phosphate-free detergent. The result show that acrylic acid-maleic anhydride copolymer have excellent chelate ability and dispersibility.It can buffer pH value and anti-redeposition using in the phosphate-free detergent.