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.
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.[3]
Nanopowder zinc borate can be used for the applications above, and also for improving the frictional properties of lubricating oils.[6]
ReferencesEdit
^(PDF). Cefic. January 2006. Archived from the original (PDF) on 9 August 2011. Retrieved 6 February 2010.
^"Zinc Borate (Boric Acid, Zinc Salt)". Chemical Land21. Retrieved 6 February 2010.
^"Firebrake zinc borates for plastics". Luzenac Group. Retrieved 6 February 2010.
^Bellingham, F. (25 November 1992). "Zinc borate in intumescent paints". European Polymers Paint Colour Journal. Retrieved 6 February 2010.
^"zinc borate (Firebreak ZB) EPA Pesticide Fact Sheet 10/91". Pesticide Management Education Program. 1 October 1991. Retrieved 6 February 2010.
^"Nano-zinc borate". Shandong Xinruida Chemical Co., Ltd. Retrieved 6 February 2010.
External linksEdit
Zinc borate in the Pesticide Properties DataBase (PPDB)
October 20, 2023
zinc, borate, inorganic, compound, borate, zinc, white, crystalline, amorphous, powder, insoluble, water, toxicity, melting, point, identifierscas, number, 1332, ytetrahydrate, 12513, 8b6o18zn9, 12280, 2pubchem, 167155b6o11zn2, 92043228tetrahydrate, 56846126b6. 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 Zinc borate IdentifiersCAS Number 1332 07 6 Ytetrahydrate 12513 27 8B6O18Zn9 12280 01 2PubChem CID 167155B6O11Zn2 92043228tetrahydrate 56846126B6O18Zn9 57347166UNII 21LB2V459E YExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references Contents 1 Variants 2 Uses 3 References 4 External linksVariants EditSeveral variants of zinc borate exist differing by the zinc boron ratio and the water content 1 Zinc borate Firebrake ZB 2ZnO 3 B2O3 3 5H2O CAS number 138265 88 0 Zinc borate Firebrake 500 2ZnO 3 B2O3 CAS number 12767 90 7 Zinc borate Firebrake 415 4ZnO B2O3 H2O CAS number 149749 62 2 ZB 467 4ZnO 6B2O3 7H2O CAS number 1332 07 6 ZB 223 2ZnO 2B2O3 3H2O CAS number 1332 07 6The hydrated variants lose water between 290 415 C Uses EditZinc 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 III oxide as a synergist in both halogen based and halogen free systems 2 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 3 Zinc borate is used in polyvinyl chloride polyolefins polyamides epoxy resins polyesters thermoplastic elastomers rubbers etc It is also used in some intumescent systems 4 Zinc borate has synergistic effect with zinc phosphate or barium borate as a corrosion inhibitor pigment Zinc borate acts as a broad spectrum fungicide in plastics and wood products 5 Zinc borate can be used as a flux in some ceramics In electrical insulators it improves the ceramics properties Nanopowder zinc borate can be used for the applications above and also for improving the frictional properties of lubricating oils 6 References Edit Flame Retardants Fact Sheet Zinc borate PDF Cefic January 2006 Archived from the original PDF on 9 August 2011 Retrieved 6 February 2010 Zinc Borate Boric Acid Zinc Salt Chemical Land21 Retrieved 6 February 2010 Firebrake zinc borates for plastics Luzenac Group Retrieved 6 February 2010 Bellingham F 25 November 1992 Zinc borate in intumescent paints European Polymers Paint Colour Journal Retrieved 6 February 2010 zinc borate Firebreak ZB EPA Pesticide Fact Sheet 10 91 Pesticide Management Education Program 1 October 1991 Retrieved 6 February 2010 Nano zinc borate Shandong Xinruida Chemical Co Ltd Retrieved 6 February 2010 External links EditZinc borate in the Pesticide Properties DataBase PPDB Retrieved from https en wikipedia org w index php title Zinc borate amp oldid 1101936201, wikipedia, wiki, book, books, library,
