zinc borate 1.Appearance:white powder 2.Cas no.;1332-07-6 3.Molecular weight: 434.62 4.competitive price and high quality

Zinc borate 3.5H2O

Introduction:

Zinc borate is primarily usedas 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.

Specification:

No.	ITEM	Index
1	Zinc Borate %	99 min
2	Apperance	White crystal powder
3	Boron Oxygenation (B2O3) %	48.5±1.5
4	Zinc Oxygenation (ZnO) %	37±1.5
5	Surface Moisture (H2O) %	≤1
6	specific gravity g/cm3	2.67
7	Residues on 325 mesh %	≤0.2
8	Temp of loss crystal water °C	350±50
9	LOI	13.5±0.5
10	Refractive index	1.58
11	Melting point °C	980
12	Pb %	0.02 max
13	Fe %	0.05 max
14	As %	0.02 max
15	Packing	Inner plastic film with PP woven bags outside
16	Net weight	25 kg/ Bag
17	Loading Quantity	18-20MT / 20'FCL

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Industrial Grade Zinc Borate As Flame Retardant