The Role of Sodium Hexametaphosphate in Coatings

sodium hexametaphosphate can play a very good dispersing role in the paint, complexing the calcium and magnesium ions in the paint, making the paint color and dripping performance better.

Sodium hexametaphosphate is viscose after absorbing water, which is closely related to the nature of sodium hexametaphosphate itself. The molecular formula of sodium hexametaphosphate is (NaPO3) 6, which belongs to a polyphosphate with uncertain composition. The anion of sodium hexametaphosphate has a high molecular weight. Generally, it contains as many as 30-90 PO3 genes and forms a long chain.

Due to the addition of sodium silicate and other alkaline substances, the alkaline environment with PH value of 10-10.5 was prepared, that is, the concentration of OH-ion in the coating is high and the reaction proceeds to the right, which is helpful for the further decomposition of H3PO4 and the conversion of sodium hexametaphosphate to orthophosphate. At this time, the phosphate will condensate several phosphate functional groups, especially the sodium hexametaphosphate molecular group will condensate at high temperature. After condensation, the molecular group will be combined with the three-dimensional network of bentonite molecular group in the paint, which plays an effective role in bonding.

With the increase of sodium hexametaphosphate content in Yucai Phosphate Chemical Plant of Zhengzhou, the effect on brushability is more obvious. When the content of sodium hexametaphosphate is 2%, the paint is thinner, the fluidity is good, but the flow is serious. After the paint is painted, there are obvious flow marks and the effect is poor. When the content of sodium hexametaphosphate in the paint rises to about 6%, the paint can be saturated, brushed lightly and smoothly. Moreover, after brushing, the paint will automatically flow without leaving any trace, and the viscosity of the paint will recover. The dripping property of the paint with this content can be saturated. Very low and brushed paint can maintain its inherent shape under the action of gravity, to achieve the degree of balance with dripping property.

Yucai Phosphate Chemical Plant specializes in producing: sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium hydroen phosphate, industrial phosphoric acid, trisodium phosphate, aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate, liquid aluminum dihydrogen phosphate, sodium dihydrogen phosphate and other phosphate series products after more than 30 years of continuous pursuit and development, relying on skilled chemical technology and product development, equipment updating and many universities. Established a good cooperative and sharing relationship, in the chemical industry played a (Yucai phosphate) brand!