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Flame Retardant Zinc Borate - China

price: contact company for price


Zinc Borate is a Boron based flame retardant compatible with many polymeric matrices. It is effective both in the solid phase and in the gas phase and its strong smoke suppressing action, helps to improve time of rescue in case of fire.Zinc Borate is a multifunctional flame retardant:Zinc borate is an inorganic compound, a borate of zinc. It is a white crystalline or amorphous powder insoluble in water. Its toxicity is low. Its melting point is 980 °C.Several variants of zinc borate exist, differing by the zinc/boron ratio and the water content, Zinc borate Firebrake ZB (2ZnO·3 B2O3·3.5H2O), is the most usually one .


Zinc borate is primarily used as a flame retardant in plastics and cellulose fibers, paper, rubbers and textiles. It is also used in paints, adhesives, and pigments. As a flame retardant, it can replace antimony trioxide as a synergist in both halogen-based and halogen-free systems. It is an anti-dripping and char-promoting agent, and suppresses the afterglow. In electrical insulator plastics it suppresses arcing and tracking.

In halogen-containing systems, zinc borate is used together with antimony trioxide and alumina trihydrate. It catalyzes formation of char and creates a protective layer of glass. Zinc catalyzes the release of halogens by forming zinc halides and zinc oxyhalides. In halogen-free system, zinc borate can be used together with alumina trihydrate, magnesium hydroxide, red phosphorus, or ammonium polyphosphate. During burning the plastics, a porous borate ceramics is formed that protects the underlying layers. In presence of silica, borosilicate glass can be formed at plastic burning temperatures.

Zinc borate is used in polyvinyl chloride, polyolefins, polyamides, epoxy resins, polyesters, thermoplastic elastomers, rubbers, etc. It is also used in some intumescent systems. Because of it’s synergistic effect with zinc phosphate or barium borate as a corrosion inhibitor pigment.Also Zinc borate acts as a broad-spectrum fungicide in plastics and wood products. In addition it can be used as a flux in some ceramics. In electrical insulators it improves the ceramics properties.


1.As a non - dangerous product , this product can be transported and stored as a common chemical .

2.Usually , the product is packed for 25/40 kg|bag, but if needed , we can also pack as your instruction.

Company Contact:

  • Phone: 8613405333392

  • Address: huantai road 666, zibo, China

  • Email: Email

Published date: July 23, 2013 -

  • Business Description: involved in international trade import export of goods, products, and services

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