High temperature flame retardant

High temperature flame retardant

High temperature resistance flame retardants are important in People's Daily life. The annual output is up 5 %.

Zinc hydrate zinc is one of the most excellent heat-resistant flame retardant varieties. The molecular formula of zinc borate was 2ZnO·3B2O3·3 5H2O, and its molecular weight was 434 66. The goods is white crystal, melting point is 980 ℃, for a long time at 300 ℃ above only 0 7% of crystal water were lost.

High temperature resistance flame retardant zinc borate is insoluble in water and general organic solvent, soluble in ammonia and become complex. The refractive index of zinc borate is similar to that of general polymer, so it can be added to the polymer to keep the original resin transparent. The goods of the dehydration temperature above 300 ℃, far higher than general polymer processing temperature, very suitable for polymer flame retardant and smoke suppression.

It is widely used on the market at present Sb2O3 flame retardant and low price, and low toxicity, its LD50 to 10000 mg/kg (oral) in rats, the smoke suppression rate of 25%, used as a flame retardant agent can be used alone, also can be used mixed with other flame retardants and the synergistic effect. It can be widely used in plastics, rubber, resin, synthetic fiber, paper, wood and its products, coating, electric insulation, wire and cable, carpet, antirust paint, elevator, vehicle cover, conveyor belt and other fields.

It can also be used for flame retardant and smoke suppression of household appliances. The production capacity of this product is less than 10kt/a, and the output is less than 5kt/a, and the market demand is above 150kt/a. Therefore, the development of zinc borate flame retardants should be developed to meet the needs of people.

Synthesis of zinc borate with low hydration is generally used in Zn(OH)2 with zinc borate or zinc sulfate, borax and ZnO. However, the production equipment of these production methods has large investment, large amount of aftertreatment, more sidelinates, and low purity of products. The production methods of ZnO and boric acid are simple, easy to operate, little investment in equipment, high purity and easy to industrialize.



Trixylyl Phosphate(TXP) Use

Phosphate Trisphenylene Phosphate Is Low, Resistant To Hydrolysis, Good Flame Retardant Can Be Used As Vinyl Resin, Cellulose Resin, Natural And Synthetic Rubber Plasticizer, Low Volatility, Good Water Resistance, Flame Retardant. Trichenylene Phosphate Use For Use In Combustible Turbine Oils, With Good Flame Resistance And Good Thermal Oxidation Safety, Good Lubricity, Extreme Pressure Antiwear Additives For Lubricants, Thickeners. Also Used For Fire-Resistant Turbine Oil, With Good Thermal Oxidation Stability, Lubricity, As A Lubricant Anti-Wear Additives, Plasticizers, But Also For Flame Retardant, Wear-Resistant, Resistant To The Mold Of The Cable, Ethylene Conveyor Belt, Artificial Leather, Foam, Flooring Materials, But Also In Metallurgy, Electricity, Mechanical Engineering And Other Aspects As A Fire-Resistant Hydraulic Oil.


ZnO 2 + 6 h3bo3 -- - > 2 b2o2 ZnO · 3 · 3 5 h2o + 5 h2o its production process is: adding boric acid and water in the reaction kettle, stir to dissolve after heating to a specific temperature, under the insulation to join ZnO reaction, reaction to a certain time after feeding, filtration, the filtrate recycling, filter cake after washing, drying, crushing, inspection the packed products. The optimum technological conditions for: ZnO: H3BO3 = 1:3.15 3.45 (the amount of material), ZnO: H2O = 1:32-34, reaction temperature is 77-90 ℃, the reaction time of 5 to 8 h. Warm water is better than cold water when washing.

Low water - hydrated zinc borate with low price, non - toxic, non - irritant, high dehydration temperature, flame retardant. The mechanical strength, elongation and thermal aging properties of the polymer are not affected. It produces ZnC12 and C1O compounds at high temperatures with halogen-containing polymers, both of which are free radical terminators and are the same as Sb2O3.

It can promote the carbonization of polymer at high temperature, so as to form a layer of adhesive on the surface of the polymer to reduce the flame and prevent the carbonization of the lower polymer. PVC containing low hydrated zinc borate from 650 ℃ to form carbide containing boron and 80% to 62% of the original zinc, zinc catalytic PVC dehydrochlorination, got behind the PVC/carbon layer, low hydrated zinc borate containing halogen materials such as polyester, nylon, epoxy resin containing bromine can be synergistic flame retardant and role.

It in non halogen materials such as ethylene vinyl acetate copolymer, polyethylene, polyvinyl chloride (PVC), epoxy resin, styrene, acrylic acid ester, synthetic rubber and aluminum hydroxide can also plays a role of synergistic flame retardant smoke suppression, and can improve the performance of filling material. Restrain drop and improve mechanical properties.

Low hydrated zinc borate from Sb2O3 and Al (OH) 3 distribution at the same time, can reduce the dosage of Sb2O3, and flame retardant effect is better, so in unsaturated polyester, epoxy resin, PBT, PET, PA, polysulfone, polyphenylene oxide, ethylene, ethylene vinyl acetate copolymer, PE, ABS, polyurethane acrylate copolymer, polycarbonate,, EPDM, is widely used in acrylic.

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