Manufacturing method and scale prevention method of scale inhibitors

摘要

An object of the present invention is to provide a method for manufacturing and scale prevention method of scale inhibitors that silica concentration to prevent high open-type calcium carbonate scale along with the silica-based scale that occurs in the circulation cooling water system at the same time. An (A) after the production of maleic acid-based polymer having no phosphono group and a phosphino group, in the same reaction vessel in a state while containing the maleic acid-based polymer (B) phosphono group and a phosphino group performs the preparation of itaconic acid-based polymer having no, the polymerization initiator addition interval from the time of first polymerization initiator end of the addition at the time of maleic acid polymer to the second polymerization initiator addition started when itaconic acid polymer scale inhibition method using two kinds of method for producing a polymer of the mixture directly to produce contact with water, characterized in metal scale inhibitors and said scale inhibitor is in the range of 15 to 120 minutes.BACKGROUND