terpolimeri obtained by acid 2 - acrilammido 2 - methyl - propan - sulphonic, (7met -) acrylamide and acrylic acid, (meta -) in the form of their salts.in particular, in the form of salts of alkali metals and ammonium salts.process to prepare these terpolimeri and procedure to prevent scaling in aqueous systems using this

摘要

Novel polymers of a) 2-acrylamido-2- methylpropanesulphonic acid, b) acrylamide and/or methacrylamide, and c) acrylic acid and/or methacrylic acid especially salts thereof with, e.g., alkali ammonia, and amines are especially effective as treating agents for the prevention and/or removal of coating and encrustation on industrial plant apparatus such as boilers, turbines and pumps. The preferred polymers and salts comprise from 0.5 to 50% by weight of component (a), from 5 to 40% by weight of component (b) and have a molecular weight within the range of from 1,000 to 10,000.