Application of boric acid in industry

In the production of optical glass, acid-resistant glass, organic boron glass and other advanced glass and glass fiber, the heat resistance and transparency of glass can be improved, the mechanical strength can be improved, and the melting time can be shortened. For example, in glass fiber production, the melting temperature can be lowered to facilitate wire drawing. In general, B2O3 can reduce viscosity, control thermal expansion, prevent devitrification, improve chemical stability, and improve resistance to mechanical and thermal shock. Boric acid is often used in glass production in admixture with sodium borates such as borax pentahydrate or borax anhydrous to adjust the sodium-to-boron ratio in the glass.

In the production of enamel and ceramics, boron oxide is a good flux and network forming body. It can prepare glass (at low temperature), improve the adaptability of the blank glaze, reduce the viscosity and surface tension, increase the refractive index, and improve the mechanical strength., Durability and wear resistance, it is an important component of lead-free glaze. High boron frit curing fast, the formation of smooth glaze speed, is conducive to coloring. Used in the production of glaze, can reduce the thermal expansion of the glaze, reduce the curing temperature of the glaze, so as to prevent cracking and deglazing, improve the gloss and fastness of the products.

The borate added to the celluloid material can change its oxidation reaction and promote the formation of "carbonization. It can therefore be flame retardant. Boric acid alone or together with borax, to reduce celluloid insulation materials, wood, mattresses in the cotton tire flammability has a good effect.

Used as an additive and cosolvent in the production of boron steel to make boron steel have high hardness and good rolling ductility. Boric acid can prevent the surface oxidation of metal welding, brazing and sleeve welding. It is also the raw material of ferroboron alloy.

Boric acid can be used as rust inhibitor, lubricant and thermal oxidation stabilizer. It is added to lubricants, brake fluids, metalworking fluids, water treatment agents and fuel additives.

Boric acid is one of the ingredients in the manufacture of corrugated paper adhesives, and it is also a peptizing agent for the manufacture of protein and dextrin adhesives. Boric acid greatly improves the wet gel strength by crosslinking the hydroxyl group.

It can be used for deashing the surface of bare skin to prevent gray spots on the surface of leather after re-tanning.

Medicine
It can be used to produce boric acid ointment, disinfectant, astringent, antiseptic, etc. National Pharmaceutical Grade (NF) boric acid is used in cosmetics, hygiene products and pharmaceuticals. As a crosslinking agent, emulsified paraffin can also be used as a bacteriostatic agent.