China crude steel output falls 17% year-on-year

LONDON (Metal-Pages) 24-Nov-08. China's crude steel production in October fell 17% year-ony-ear to 35.9 million tonnes, according to data from the National Bureau of Statistics of China.

Crude steel output for the first 10 months of the year totalled 427.29 million tonnes, which was up 3.9% from a year ago.

Steel products output for the month hit 42.93 million tonnes, down 12.4% compared with the same month in 2007. Steel production January-October totalled 487.91 million tonnes, which was 5.9% higher year-on-year.

In October 2008, China produced 67.85 million of iron ore, which was a 12.5% increase from the same month in 2007. The country's total iron ore output for January to October 2008 was 654.18 million tonnes, which was an increase of 18.8% year-on-year.

China produced 730,300 cars in October, edging down 0.7% from the same month in 2007, while it produced 8.22 million cars January-October, up 12.4% year-on-year.

European antimony trioxide market receives some interests

BEIJING (Asian Metal) 27 Nov 08 – As some people are leaving office in the middle of December for winter holiday, the European antimony trioxide market sees some activities.
A trader source disclosed to Asian Metal that they closed a deal of 99.5%min non-brand named antimony trioxide at USD4,500/t CIF European port. And according to him, 99.65%min standard grade two antimony ingot is offered to him at USD5,200/t CIF Rotterdam. Antimony trioxide price is normally about 82-85% of the metal price, so the source holds that USD4,500/t is a reasonable price.
Prior to this deal, the source had not concluded any deal for several weeks, so he thinks there may have some interest in the market before European leaves for Christmas holiday. Due to the weak economy, most European manufacturers will have longer holidays than they normally do, so this may be the last purchase for them this year.
Another European trader also received inquiries of small volume for next January delivery. He received offers from China in the range of USD4,500-4,700/t CIF Rotterdam depending on different qualities and brand names. "Price fall fast in this month because the market remained quiet for very long time," said the trader and he takes that there is not much pressure on antimony market as other commodities because the supply of raw material, antimony concentrate, is still tight in China.
"Compare to other metals, antimony price was relatively stable in October," said the source, and he thinks we are seeing close to the end of the falling price as there are some buying activities, although inquiries are in small volume. He expects the antimony trioxide price would fall by another USD200/t before it rebounds.

Zinc borate

Zinc borate, also named Flame Retardant FB, has dozens of different varieties. The most common variety is ZB-2335, also named Firebrake ZB. Molecular formula: 2ZnO·3B₂0₃·3.5H₂0, molecular weight 434.68. It is non-toxic, has low water solubility, high thermal stability, small particle size, low specific weight, good dispersibility. It is a highly efficient fire retardant widely used in plastics, rubbers and coatings.

Use

ZB2335 not only has low smokiness and good fire resistance, but also can greatly reduce the ash of rubber products (air-duct, belt conveyer) after burning. So it is the ideal substitute of antimony trioxide. It can achieve better fire retarding effect when used together with antimony trioxide.

1. Plastics: PVC, PVC ebonite foam, phenolic aldehyde, polyester, reinforced polyamide, polyurethane, polystyrene, PP, PE, ABS, epoxy resin, polyvinyl acetate etc.

2. Rubbers: natural rubbers, Styrene Butadiene Rubber, chloroprene rubber etc.

3. Paints: non-intumescent paints and intumescent paints.

MSDS (MATERIAL SAFETY DATA SHEET) OF ZINC BORATE

PRODUCT IDENTIFICATION
CAS NO.	: 1332-07-6, 138265-88-0, 149749-62-2
EINECS NO.	: 215-566-6
FORMULA	: 2ZnO.3B2O3.3.5H2O
MOL WT.	: 434.62
TOXICITY	: Oral rat LD50; 10000 mg/kg
SYNONYMS	: Boric acid, zinc salt; Borsäure, Zinksalz (German);

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE	White crystalline powder
SOLUBILITY IN WATER	Insoluble
pH	7.6
STABILITY	Stable under ordinary conditions
Specific Gravity	2.7
Melting Point	650C/1202F
Solubility in Water	<0.28% @25C

Precautions for Safe

Steps to Be Taken in Case Material Is Released or Spilled: Not applicable for products in purchased form. Wood dust generated from sawing, sanding, drilling, or routing of these products may be vacuumed or shoveled for recovery or disposal. Avoid dusty conditions and provide good ventilation. Use NIOSH/MSHA-approved respirator and goggles where ventilation is not possible and the allowable exposure limits may be exceeded. Precautions to Be Taken in Handling and Storage: No special handling precautions are required for products in purchased form. Avoid repeated or prolonged breathing of wood dust. Products with 100% MDI adhesive release no formaldehyde and have no measurable uncured isocyanate monomer. Store in well-ventilated, cool, dry place away from open flame.

APPLICATION OF ZINC BORATE

Zinc Borate has been used extensively in flexible PVC as a partial replacement for antimony oxide, such as wall coverings, wire and cables, roofing membranes, conveyor belts, carpet backing, auto upholstery, and tenting materials. In contrast to antimony trioxide, this material has a refractive index similar to that of most polymer systems, which allows the use of lower pigment loading.

Zinc Borate has been used as a fire retardant in polyolefin wire & cables, as well as electrical parts. In halogen-containing systems, Zinc Borate is used in conjunction with antimony oxide, while in halogen-free systems, it is normally used in conjunction with alumina trihydrate, magnesium hydroxide, or red phosphorus. It should be noted that the use of Zinc Borate can also improve elongation properties of polyolefins.

Zinc Borates with different chemical compositions that provide flame retardant properties and improved resistance against electrical degradation processes in many flame retardant polyamides. The combination of zinc and borate moieties provides unique functionalities. Zinc Borate also perform as synergists with brominated flame retardants to tailor FR properties and CTI. These combinations have also been shown to increase melt stability, and can be used in regrinding processes without a reduction in the original CTI values.

Zinc Borate has been used extensively as a fire retardant in elastomers for applications such as conveyor belting, wire & cables, roofing membranes, flooring material, and foamed insulation products.

Zinc Borate is a flame retardant synergist of halogen sources such as chlorinated resins, decabromodiphenyl oxide, and tetrabromobisphenol-A. Depending on the halogen source used, Zinc Borate can either partially or completely replace antimony oxide. Zinc Borate has been used extensively as a fire retardant in epoxies for applications such as intumescent coatings, glass-reinforced laminates, and encapsulation of electrical components.

OVERVIEW OF ZINC BORATE

Flame Retardant are substances that can be chemically inserted into the polymer molecule or be physically blended in polymers after polymerization to suppress, reduce, delay or modify the propagation of a flame through a plastic materials. There are several classes of flame retardants; Halogenated Hydrocarbons (Chlorine and Bromine containing compounds and reactive flame retardants), Inorganic flame retardants ( Boron compounds, Antimony oxides, Aluminium Hydroxide, molybdenum compounds, zinc and magnesium oxides ), Phosphorous containing compounds (Organic phosphate esters, phosphates, halogenated phosphorus compounds and inorganic phosphorus containing salts).

Zinc Borate is a boron-based fire retardant with a chemical composition of xZnOyB2O3zH2O. The most commonly used grade have following structure 2ZnO.3B2O3zH2.3,5H2O.

Zinc Borate can be used as a fire retardant in PVC, Polyolefins, Elastomers, Polyamides, Epoxy resins. In halogen-containing systems, Zinc Borate is used in conjunction with antimony oxide, while in halogen-free systems, it is normally used in conjunction with alumina trihydrate, magnesium hydroxide, or red phosphorus. In some particular application Zinc Borate can be used alone.

Zinc Borate act through :

• Zinc halide or zinc oxyhalide that accelerate the decomposition of halogen sources and promote char formation.
• by the B2O3 moiety released, a low melting glass, that can stabilize the char. B2O3 released can also promote the formation of ceramic formation in systems containing ATH or magnesium hydroxide.
• the endothermic, stepwise release of water that can promote the formation of foamy char.

Zinc Borate

Specification of Zinc Borate
Chemical formula 2 Zno.3 B2O3.3.5H2O Appearance White amorphous powder Bulk density(g/cm3) 0.3-0.5 gm / cc pH of filtrate of 20% aqueous 7.0 -8.0 Sieve residue (200 mesh 75 micron) 0.2% max Ignition loss (950°C) 15.5% max Zno Content 37.0% min B2O3 Content 47.0% min
Zinc Borate (ZB) Addition Level
Applications	Addition Rate	Comments
1 PVC		Benefits: Smoke suppression, Synergy, Char Formation.
a) PVC Wiring Compound	2 phr.	Product UL 94, V- 0 rating, L.O.I 31.5% 65% Smoke reduction (Flaming) compared with 3 phr Antimony Trioxide. 37% Smoke reduction (Somouldering) compared with 3 phr Antimony Trioxide (NBS Smoke Chamber Test). Heat Stability> 150 min at 185OC. After flame time -13 seconds (10 ignitions.)
	2 phr	Plus 1.0 phr Antimony Trioxide addition addition. UL 94, v-0 rating, L.O.I. 34.5% 53% Smoke reduction (Flaming) c.f.3 phr Antimony Trioxide. 34% Smoke reduction (Smouldering) Char Formation 26% (plus 0.5 phr Antimony Trioxide)
b) PVC Cable Compound	1.5 phr	Pus addition of 15 phr Alumina Trihydrate and 1.5 phr Antimony Trioxide. UL 94 V-01 rating L.O.I 31% 48% Smoke reduction (Flaming) c.f 3 phr Antimony Trioxide 21% Smoke reduction (Smouldering). Heat Stability 75 min at 185°C
c) PVC Plastisol 50 phr DOP	5 phr	Plus addition of 5 phr Antimony Trioxide. UL 94, V-0 rating L.O.I 31.5% 24% Smoke reduction (Flaming) c.f. 10 phr Antimony Trioxide. 55% Smoke reduction (Smouldering After flame time- 0 seconds)
2 Halogen – Free Cable Compounds		Benefits: Smoke suppression, Synergy, After flame Reduction, Char Formation
A) Ethylene Finyl Acetate	10 phr	Plus addition of 170 phr Alumina Trihydrate, 20 phr magnesium Carbonate UL 94, V-0 rating, L.O.I 39.0% Smoke Density Dmax> 250.
	5 phr	Plus addition of 195 phr Alumina Trihydrate, 10% smoke reduction
	10 phr	Plus addition of 190 phr Alumina Trihydrate, 35% smoke reduction
	100 phr	Plus addition of 100% phr Alumina Trihydrate, 35% smoke reduction
b) EPDMUHF Cured	10 phr	Plus addition of 150 phr magnesium Hydroxide, UL 94, V-0 rating. After flame duration 3 seconds. Glow duration 3 seconds.
3 Conveyor Belting		Benefits: Synergy, Afterglow suppression
a) Neoprene / SBR Blend	15 phr	Plus addition of 14 phr Alumina Trihydrate + 5 phr Antimony Trioxide. UL 94, V-0 rating, L.O.I 45% Also meets German DIN STD 22118
b) Neoprene	10 phr	Plus addition of 25 phr Antimony Trioxide. UL 94, V-0 rating no Afterburn or Afterglow
4) Nylon 6.6		Benefits: Synergy, Anti- Drip, Electrical Track Property Improvement
a) Nylon 6 Copolymer (Glass Reinforced )	3 phr	Plus addition of 20 phr Melamine, 3 Phr Dechlorance plus UL 94, V-0 rating – speciment thickness 1.66 mm. Comparative Tracking 0.4. (CTI)-451 volts.
b) Nylon 6.6	10 phr	Plus addition of 20 phr Dechlorance, plus UL 94, V-0 rating – specimen thickness 0.4. CTI-300 volts.
c) Nylon 6	2.5	Plus addition of 20 phr Dechloration plus. 2.5 phr Antimony Trioxide UL 94, V-0 rating – specimen thickness 1.66 mm CTI-425 volts.
5 Glass Reinforced Polyester		Benefits: Synergy Smoke levels contained
a) Brominated Polyester	2.90%	Used alone, UL 94, L.O.I., 35.5% Smoke levels limited to inherent resin levels, ie approx. 12% (Arapahoe method).
b) Chlorinated Polyester	1.2%	Plus addition of 1.2% Antimony Trihydrate UL 94, V-0 L.O.I 43% Smoke limited to resin level, ie approx. 13%
c) Halogen Free	10%	Plus addition of 30% Alumina Trihydrate + 105 Phos-check P 30 U194, V -0 L.O.I. 31.0% Addition of Zinc Borate in this (Arapahoes test) form 6.5% to 4.7%
6 Epoxy		Benefit : Synergism, L.O.I Improvement
	2.5 phr	Plus addition of 25.5 phr Dechlorane Plus +2 .5 phr Antimony Trioxide. UL 94, V-0, L.O.I 28.0%
7 Carper Backing		Benefits: Bond strength improvement c.f Antimony Trioxide or Alumina Trihydrate.
a) PVC Latex	10 phr	Adhesive backing layer for Nylon 6.6 carpet Low smoke carpets eg Aircraft
8 General Rubber	5 phr	Benefits: Afterglow suppression can be used in conjunction with Chlorinated Paraffin to improve Flame Reardancy
9 Cotton Fabric	15% on weight of other flame Retardants present	Benefits: Afterlow suppression. Cotton/polycotton latex.
Treatment		Coating typically containing Decabromo / Antimony Trioxide BS 528 afterglow requirement possible

Zinc Borate

Zinc Borate is a boron-based fungicide and fire retardant with a chemical composition of ZnOB2O3H2O. The most commonly used grade have following structure 2ZnO.3B2O3zH2.3,5H2O

Its optimum performance is as a Biocide (fungicide and preservative) and corrosion inhibitor and this is obtained when our product is uniformly dispersed in a coating or composite. With a coating it should be incorporated during the pigment dispersion cycle in the coating preparation process.

Zinc Borate can be used as a fire retardant in PVC, Polyolefins, Elastomers, Polyamides, Epoxy resins. In halogen-containing systems, Zinc Borate is used in conjunction with antimony oxide, while in halogen-free systems, it is normally used in conjunction with alumina trihydrate, magnesium hydroxide, or red phosphorus. In some particular applications Zinc Borate can be used alone.

Royce Zinc Borate is EPA approved.

Following is the Royce range of Zinc Borate based products

1. FireChoke ZB is used in most polymer compounds as a smoke suppressant and flame retardant. At temperatures in excess of 290 degrees centigrade, Zinc Borate diffuses water of hydration to prevent fire and suppress smoke. FireChoke ZB is also used to impregnate flame retardant properties to canvas materials and cotton fabrics. Typical applications in canvases are Tents. For more information on the right grade for your polymer or textile, please contact us using the contact us form

2. Fiberguard is specifically used for treatment for Wood, Lumber, and Hardwood Plywood against termites and other corrosive insects. Widely used by the American Lumber industry as also a preservative, this product has been tried,, tested and is used extensively to promote the long life of wood. Newer applications meet the needs of MDF particle board and Wood Composite product manufacturers. Plastic-Wod deckboards benefit with flame retardant and mold prevention properties when added in the extrusion stages.

3. CeramicGuard-ZB : Recently, borates have been an essential ingredient in ceramic and enamel glazes, integral to affixing glazes or enamels, and enhancing their durability and luster. Borates now are gaining acceptance as an essential ingredient in ceramic tile bodies, allowing manufacturers to use a wider range of clays, heightening productivity and decreasing energy usage.

Zinc Borate in Plastics :

Polymer	Benefits
PVC	· Smoke suppressant · Flame retardant · Synergist of antimony oxide · Lowers total fire retardant cost · Char promoter
Polyolefins	· Smoke suppressant/char promoter · Afterglow suppressant · Improves elongation properties · Anti-arcing agent
Polyamides	· Anti-tracking agent · Synergist of halogen sources · Afterglow suppressant · Used in both halogen containing and halogen-free nylons
Elastomers	· Smoke suppressant · Afterglow suppressant · Char promoter · Anti-arcing and anti tracking agent
Epoxy resin	· Smoke suppressant · Char promoter · Partial or complete replacement of antimony oxide

Ask one of our experts to recommend a formulation for your requirements.

ZINC BORATE

Product Name: ZINC BORATE
CAS No.: 1332-07-6
Molecular Formula:2ZnO.3B2O3.3.5H2O
Specification :

ZnO %	37.51.5
B2O3,%	48.0 1.5
Free moisture(105 loss weight),%	1.0
Size(through 325 mesh rate),%	1.0
Loss on ignition(450 )	14.5 1.0
Packing:	Packing with braided (with liner)bag, net weight 25.0kg/bag or 40.0kg/bag.
Properties:	IT IS A KIND OF NEW-TYPE INORGANIC AND ADDITIVE-TYPE FIRE-RETARDANT, WHITE OR YELLOW POWDER. INSOLUBLE IN WATER, ALCOHOL, BENZENE AND CETONE, EASY SOLUBLE IN HYDROCHLORIC ACID, SUFURIC ACID AND DIMETHYL SULFOXIDE. IT IS PERFORMANCE IS NON OF POISON, LOW TINTING POWER, FINE GRAININESS, FINE DISPERSED AND WELL HEAT-STABILITY. BOTH RESISTANT-FLAME AND SMOKE-ABATEMENT. MOREOVER, IT HAS ACTION OF ARC BLOW-OUT, WHILE IT IS USED WITH SB2O3, CHLOROPARAFLIN 70, THE EFFECT OF RESISTANT-FLAME IS BETTER THAN EVER.
Application:	The products may replace partial poison sb2o3, being fire-retardant, it is used in various projecting plastics, the products of rubber, coating and textile fabric etc. such as pvc, polypropylene, polyester, abs resistant-flame wire and cable etc in products of rubber. besides it can be used in coating of resistant-flame antirust, resistant-flame glass fiber reinforced plastics tile, textile fabric of water proof, medicinal, ceramic-glazes medical, coatings proof agent gerrnicide, etc.

Zinc borate

Properties:Zinc Borate produced is also called FB Fire Retardant, ZB-2335 Fire Retardant or Firebrake ZB. Commodity Name: Zinc Borate (3.5H₂O) , ( FIREBRAKE ZB 2335) Molecular Formula: 2ZNO、3B₂O₃、3.5H₂O
White crystal powder, without poison, flavor and corrosiveness. Doesn't dissolve in water and other organic solvent, is easy dissolved in hydrochloric acid & sulfuric acid, etc. Good thermal stability, small granule size, less specific gravity and easy dispersed. Good miscibility with most of the polymer. Fewest smoke when burning, excellent performance in inflaming retarding.

Product Specification:

No.	ITEM	Index
1	Zinc Borate %	99
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 ℃	350±50
9	LOI	13.5±0.5
10	Refractive index	1.58
11	Melting point ℃	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

Application:Widely used in industry of rubber, plastic, fibre, paint, ceramic, medicine. Also used in producing of insulating material & products, rubber tapes & pipes, electrical cables & wires, germicide, mildew inhibitor, and many kinds of fire protection coatings. Good effect when used together with organic halide. The Zinc Borate can be used as fire retardant singly, also can be mainly used instead of stibous oxide; comparing with stibous oxide, the Zinc Borate is cheaper & no poison. The Zinc Borate acts the roles as frit in ceramics, acts the roles as the matching material in Radial tyre, also acts the roles as the preservative in wood industry too. In a word, it is an ideal inorganic fire retardant with function of environment protection.

Packing:25kg/bag, 40bags/pallet, 18pallets/20'FCL.

Zinc Borate Application

Flame retardant-Zinc Borate 2335

Specification

Product standard： Q/ZWW003-2003

Item/Grade	Zinc borate 2335( 2ZnO.B2O3 3.5H2O)
	Excellent grade	First grade
Whiteness	99	95
Surface water　%　≤	0.5	1.0
Particle size, um	3-5	3-5
ZnO, %	37.0-40.0
B2O3 , %	45.0－48.0
Loss on ignition,%	13.5－15.5
Fineness (Residue on 45um sieve ), % ≤	0.1
Specific gravity, g/cm3	2.67
Melting pointoC;	980
Temp. of dehydration　oC>	320
Refractive index	1.58

Introduction:
Zinc Borate is one environmental-friendly halogen-free flame retardant. There are some formulations of XZnO.YB₂O₃.ZH₂O, in which Zinc Borate with 3.5 hydrate is called ZB－2335 (2ZnO.3B₂O₃3.5H2O)is the most common used grade. It has owned some excellent properties on non-toxicity, slight solubility in water, good thermal stability, fine particle size, low specific gravity, great free-flowing etc. As one high efficient flame retardant, it is widely used in plastic, rubber, coating etc fields.

Applications:

1. Zinc borate can be used as multi-functional synergistic additives with antimony oxide or other halogenated flame retardants to significantly improve the flame retardant performance, remove smoke emission and adjust the balance on chemical, mechanical, electrical etc properties.

2. As environmental protection substitute to replace current Antimony Oxide or halogen flame retardants, Zinc borate is directly used in PVC, PE, Polyolefin, Epoxy Polyamide etc resins and rubber process. Moreover, it is widely used in textile, fiber, floor, leather, wall paper, carpet, paint etc decorative materials to improve flame retardant performance.

3. Base on its chemical properties, Zinc borate is also used on anti-corrosion, infra red absorption, fungicide for wood preservation etc fields.

Package:

Zinc borate should be pack, transported, stored as normal chemical goods.

Standard package is 25kg/bag,500kg/bag,and can design package according to order.

ZINC OXIDE

Chemical name: Zinc Oxide. Molecular Formula: Zno Our company is a factory that has various Zinc Oxide. Has calcined method Zinc Oxide, indirect method Zinc Oxide, direct method Zinc Oxide and active Zinc Oxide.
Calcined Method Zinc Oxide Appearance: Slightly yellow or white powder Calcined method Zinc Oxide is divided industry grade and feed grade. Industry Grade Zinc Oxide has merits as follows: impurity content is lower, specific surface area and stacking density (bulk) is large. It is used in ceramics, rubber industry etc. Its standards of content have 99.5%, 99%, 98%, yield 5000MT/Y. Feed grade Zinc Oxide's content higher and its content of lead, cadmium, arsenic are lower. Feed Grade Zinc Oxide's content has 99% and 98%, yield 4000MT/Y.
Standard: Up to Q/320201NAS005-1997
Name Index Type1 Type2 Feeding Grade High Grade First Grade Qualified Appearance Yellowish-white or slightly yellow powder Zinc Oxide (on dry basis) ≥% 99.7 99.5 99.0 98.0 95.0 PbO(as per Pb) ≤% 0.037 0.05 0.15 - 0.003 CdO(as per Cd) ≤% 0.005 0.02 0.04 - - CuO(as per Cu) ≤% 0.0002 0.006 - - - Oxide of Manganese (as per Mn) ≤% 0.0003 0.0005 - - - Arsenic ≤% - - - - 0.001 Metallic Matters (as per Zn) ≤% Naught Naught 0.008 - - Ignition on Decrement ≤% 0.2 0.4 0.6 - - Hydrochloric acid insolubles ≤% 0.03 0.05 0.08 - - Water solubles ≤% 0.1 0.4 0.7 0.7 - Moisture ≤% 0.3 0.4 0.4 0.4 - Residue on sieve 45um (wet sieving)≤% 0.1 0.28 0.35 0.5 - Residue on sieve 154um (dry sieving)≤% - - - - 5

ZINC BORATE

1.Properties: Chemical Name: Zinc Borate Commodity Name: Fire Retardant ZB2335 Molecular Formula:2ZnO·3B2O3·3.5H2O Molecular Weight:434.62 Physical Properties: White or slightly yellow amorphous powder
Chemical properties: Insoluble in water, ethyl alcohol, n-butyl alcohol, benzene, acetone; easily soluble in hydrochloric acid, sulphuric acid, dimethyl sulfoxide. High-heat stability, easy to disperse, nontoxic.
2.Standard:Up to the Standard Q/320201NZ056-91 Specifications:
Name Index Content of ZnO% 37～40 B2O3 % 45～49 Free Water ≤% 1.0 Residue on seive 45um(wet sieving)≤% 0.5
3.Applications:
As a fire retartant for engineering plastics, rubber items, coating, textile fabrics, etc. Also used in pharmaceuticals, water proof textiles, ceramic glaze, mould inhibitor of coating germicidal mould inhibitor, germicides, etc.
4.Packing:
In plastic film bags wrapped with woven bags. Net weight 25kg each.
5.Cautions for transportations and storage:
Be stored in a clean and dry storehouse, don't to let it be rained on, no mix storage and transportation with acids is allowed.

zinc borates for plastics

Introduction Firebrake® zinc borate is a multifunctional boron-based fire retardant with the chemical composition xZnO.yB2O3.zH2O. It imparts benefits to a wide variety of polymer compounds. Key benefits: Flame retardant in both halogen containing and halogen free systems Partial or complete replacement of antimony trioxide (Sb2O3) Smoke suppressant Afterglow suppressant Char and anti dripping promoter Lowers rate of heat release Anti arcing and anti tracking agent
Halogenated systems Firebrake® promotes zinc halide or zinc oxyhalide formation that accelerates the decomposition of halogen sources and promotes char formation. In halogen containing systems, Firebrake® is used in conjunction with antimony trioxide and alumina trihydrate. The zinc component catalyzes the decomposition of the halogen source to promote crosslinking and char formation. The borate component forms a glassy layer to protect the char from being further oxidized (afterglow suppression). The water given off can cool the flame and promotes the formation of an insulating char.
Halogen free systems Firebrake® promotes the formation of a low melting glass that stabilizes the char In halogen free systems, it is normally used in conjunction with alumina trihydrate, magnesium hydroxide, red phosphorus or ammonium polyphosphate. In some particular applications, zinc borate can be used alone. During polymer combustion, it can form a highly porous ceramic residue which protects the underlying unburned polymer or its substrate. In the presence of a silica source such as silicone polymer or SiO2, Firebrake is understood to form a borosilicate glass at polymer combustion temperatures. Firebrake® grades: Firebrake® ZB: combining zinc and boron oxides and water release for fire retardant formulations processable up to 290°C. Firebrake® ZB Fine: finer particle size for applications where maximum fire tests and mechanical performance are required. Firebrake® ZB XF: this grade has no particles greater than 12 microns, as determined by laser diffraction technique. Firebrake® 415: having higher zinc to boron ratio and much higher dehydration temperature, processable up to 415°C. Firebrake® 500: an anhydrous form of Firebrake® ZB, especially designed for applications where no water evolution is permitted.
Polymer resins Zinc borate can be used as a fire retardant in PVC, polyolefins, elastomers, polyamides, epoxy resins. Addition of Zinc borate in formulations provides to polymeric materials the following benefits: Polyamides: The choice to use Firebrake® ZB, 415 or 500 will depend on the specific nylon material, especially in halogen free polyamides. In these systems, zinc borate can inhibit afterglow and prevent burning drips.

Polymer Type	Benefits of Firebrake®	Applications
Flexible PVC, Rigid PVC	Smoke suppressant Flame retardant Synergist of antimony trioxide Char promoter	Conveyor belting, car interior trim, roofing membrane, flooring, wires & cables, wall coverings
Polyolefins, EVA	Smoke suppressant / Char promoter Afterglow suppressant Improves elongation properties Anti-arcing agent	Wire & cable, foam insulation, electrical parts
Polyamides	Anti-arcing and anti-tracking agent Synergist of halogen sources Afterglow suppressant Used in both halogen containing and halogen free nylons	Electrical components, adhesives
Elastomers, SBR, Silicone, EPDM, Neoprene	Smoke suppressant Afterglow suppressant Char promoter Anti-arcing and anti-tracking agent	Wire & cable, conveyor belting, roofing membrane, foam insulation, flooring insulator, coatings, sealants
Thermoset resins (Epoxy, Unsaturated Polyester, Urethane, Phenolics.)	Smoke suppressant Char promoter Partial or complete replacement of antimony trioxide	Intumescent coatings, encapsulant, panelling, containers, foam, adhesives, electrical parts

If you have a query or would like to receive technical documentation on Firebrake® in plastics