METHOD FOR PRODUCING PHOSPHATE-BASED POLYMER

摘要

PROBLEM TO BE SOLVED: To provide a method capable of industrially and stably producing a phosphate-based polymer suitable as a dispersing agent for hydraulic composition capable of imparting excellent dispersing effect and viscosity-reducing effect to the hydraulic composition in practical level and good reproducibility. SOLUTION: When copolymerizing a specific monomer 1 having a polyoxyalkylene group with a phosphoric acid monoester-based monomer 2 and a phosphoric acid diester-based monomer 3, a liquid A containing the monomer 1 and a liquid B containing the monomer 2 and the monomer 3 are each separately introduced into a reaction system and≥90 wt.% of each of total amount of the liquid A and the liquid B introduced into the reaction system is simultaneously introduced into the reaction system to provide the phosphate-based polymer suitable as the dispersing agent for hydraulic composition. COPYRIGHT: (C)2007,JPO&INPIT