high range water reducer polycarboxylate admixture

Typical properties Appearance       Colorless  Specific gravity@25℃   1.100±0.020 pH value              5.0-7.0 Chloride content        chloride-free Solid content           50.0±0.50 Production method: The synthesis route of naphthalene sulfonate water reducer is as follows: naphthalene → sulfonation → hydrolysis → condensation → neutralization → filtration → drying → product The raw material for production is naphthalene, which is first subjected to sulfonation reaction with concentrated sulfuric acid. The molar ratio of naphthalene to sulfuric acid is 1:1.3-1.4. The temperature is 160-165 ℃ and the reaction time is 3 hours. Then, the reactants were cooled to 120 ℃ for hydrolysis. At this time, 13-naphthalene sulfonic acid was stable, while d-naphthalene sulfonic a…