Phosphoric Acid → Tricalcium Phosphate

Participants

Reaction Steps

A round bottom separable flask equipped with a stirrer and a thermometer was charged with 4.61 g of calcium hydroxide and 145.39 g of distilled water, and they were vigorously stirred to prepare a suspension. The suspension was controlled to a temperature of 40° C., and an aqueous solution prepared by mixing and dissolving 33.01 g of a 11.1% phosphoric acid aqueous solution, 56.21 g of the water-soluble polymer (Polymer A) aqueous solution adjusted to a pH of 10.0 obtained in Polymer Production Example 1 and 10.78 g of distilled water was continuously added thereto in 2 hours by means of a microtube pump while stirring at a stirring rate of 200 rpm (reaction method I). After addition, the reaction was further carried out at 40° C. for one hour to obtain a (meth)acrylamide base polymer/calcium phosphate fine particle (50:50)-dispersed aqueous solution (a-1) which does not cause separation even after standing for one day and which is excellent in stability.

Provenance & Evidence