What is the use of barium metaborate

The English name is barium metaborate

Don’t call it Barium diboron tetraoxide;

Chemical formula Ba(BO2)2

Molecular weight 222.95

EINECS entry number 237-222-4

Slightly soluble in water

The function of barium metaborate: It has the properties of rust prevention, powder resistance, high temperature resistance, fire prevention and mildew

prevention. Modified barium metaborate is a new non-toxic anti-rust pigment used in primer and topcoat in coating industry, and is also used in ceramics,

papermaking, rubber, textiles and plastics industries.

Modified barium metaborate can be used as a multi-functional pigment in coatings, which has the functions of anti-rust, anti-mildew, anti-bacteria, anti-fouling,

flame retardant and color preservation. In the plastics industry, antimony trioxide can be partially replaced as a flame retardant, usually replacing 50%, which not

only reduces the cost, but also has high thermal stability, the color is not easy to dark in the industrial sulfide smoke, improve light transmission, and does not

produce toxic gases when heated. In addition, it can improve the weather resistance and toxicity resistance of plastics. It is mainly used as a flame retardant in

fabrics.Barium metaborate: white rhombic crystalline crystalline powder, slightly soluble in water, easily soluble in hydrochloric acid, with rust, powder resistance,

high

temperature resistance, explosion protection and other functions. In storage and transportation, barium metaborate is easy to absorb moisture, caking, water

soluble, in various resins in the phase and in the paint film in the firmness are poor, not suitable for use as pigments. However, if the modified barium metaborate

is prepared by polymerized and amorphous hydrated silica coated with barium metaborate, the solubility of barium metaborate can be reduced. Barium metaborate

absorbs moisture during storage, which reduces the amount of salt in the saturated solution, precipitates fewer new grains that can bond crystals when drying and

cooling, and reduces the caking phenomenon of modified barium metaborate in storage. So the actual product is this modified barium metaborate, modified barium

metaborate contains a certain amount of silicon dioxide and crystal water, the theoretical chemical formula is Ba(BO2)•H2O. With a relative molecular weight of

241.0, commercial pigments contain at least 90% barium metaborate [Ba(BO)2•H2O]. The modified barium metaborate product is composed of crystalline

particles, the particle size range of the commodity generally fluctuates in 0.35 ~ 35μm, the average particle size is about 8μm, the effective particle size is 3μm,

the modified barium metaborate has dehydration phenomenon, but it is not fully hygmomorph, nor will it absorb water from the air. When it is heated to 1050℃,

the modified barium metaborate is slightly soluble in water, and the solubility is up to 0.4% in water at 21℃, and the general typical product is 0.3%, which is

easily soluble in hydrochloric acid. It has anti-rust, anti-powder, anti-mildew, high temperature resistance and flame retardant effect.

Production process of barium metaborate: barium sulfide method of borax. Reaction equation: BaSO4+C→BaS+CO2↑ 2NaOH+2BaS+Na2BaO4→

Ba(BO2)2↓+2Na2S+H2O