Do You Know Everything About Zinc Borate?

In the chemistry field, Zinc Borate (ZB) is referred to as an inorganic compound (a borate of zinc). It is insoluble in water and has low toxicity. Its melting point is 980 °C.

This chemical compound has different variations due to the ration of zinc/boron and the water content in it.

The following are some of the most common variations –

  • Firebrake ZB (2ZnO·3 B2O3·3.5H2O)
  • Firebrake 500 (2ZnO·3 B2O3)
  • Firebrake 415 (4ZnO·B2O3·H2O)
  • ZB-467 (4ZnO·6B2O3·7H2O)
  • ZB-223 (2ZnO·2B2O3·3H2O)

Chemical properties of this compound include-

1. White crystalline
2. 980 °C melting point
3. Low vapor pressure
4. Insoluble in water

Industrial applications of ZB-

  • It is primarily used in plastics and cellulose fibers, paper, rubbers and the textiles industry because of its flame retardant feature.
  • Many paints, adhesives, and pigment manufacturing companies make use of it because it can easily be mixed with other compounds.
  • Because it is flame retardant in nature, it is used in both halogen-based and halogen-free systems, which otherwise comprises of antimony (III) oxide compound.
  • It is an anti-dripping and char-promoting agent that suppresses arcing and tracking, when used in electrical insulator plastics.
  • It easily blends when mixed together with antimony trioxide and alumina trihydrate.
  • When mixed with alumina trihydrate, magnesium hydroxide, red phosphorus, or ammonium polyphosphate, it protects the underlying layers when plastic burns.
  • Because of its extensive chemical properties, it is used in polyvinyl chloride, polyolefin, polyamides, epoxy resins, polyesters, thermoplastic elastomers, and rubbers. Besides this, it is also used in some intumescent systems.
  • Its synergistic effect with other chemicals like zinc phosphate or barium borate creates a corrosion inhibitor pigment that is useful for many industries.
  • To help reduce fungicide in plastics and wood products, borate of Zinc is used by many wooden application industries as well.
  • It is widely used in the ceramics industry.
  • It is used to improve properties of lubricating oils.
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