Synthesis, analysis and application of naphthalene sulfonic acid formaldehyde condensate

Abstract

β-naphthalene sulfonic acid formaldehyde condensate is a kind of dispersant with good properties, such as wetting, emulsifying, dispersing. It is widely used as coating dispersant, dye dispersant, cement water reducer and so on. Therefore, the synthesis of naphthalene sulfonic acid formaldehyde condensate and its application performance are of great practical significance. In this paper, naphthalene sulfonic acid formaldehyde condensate was synthesized from naphthalene, concentrated sulfuric acid and formaldehyde with the ratio of naphthalene to sulfuric acid approaching 1:2, the condensation temperature ranging from 110∼120°C and the condensation time of 5.5 hours. The characteristics of groups in products were determined by IR.