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Flame retardant mechanism of boron flame retardant
2017-9-17 21:18:05
Flame retardant mechanism of boron flame retardant
The flame retardant mechanism of boron flame retardant is an example of the flame retardant effect of boric acid and borax in fiber fabric. In the conventional case, the main pyrolysis of cellulose is dextran, and further decomposed into carbon monoxide, alkanes, ethanol, acetaldehyde, etc. After boron flame retardants are added, boron flame retardants are melted in flame, forming the outer layer of the glass, which insulates oxygen and heat.
The hydroxyl reaction of boron and cellulose in the coagulation phase produces boric acid ester, which inhibits the formation of dextran and reduces the combustible gas. Boric acid also causes ethanol to dehydrate. So when borates are pyrolytic with cellulose, they tend to have a lot of carbon.
Zinc borate is general and halogen flame retardants (RX) mix, to achieve better flame retardant effect, when exposed to fire, producing gaseous halogen boron, zinc halide, and release the zno crystal water 2, 3 of b2o3, 3.5 H2O + 22 znx2 RX - > 2 + 6 r2o bx3 + 11 + 3.5 H2O burning at the same time the HX continue to react with zinc borate generated halide boron and zinc halide. Zno, 3 b2o3, 3.5 2 H2O + 22 znx2 rx - > 2 + 6 bx3 + 14.5 H2O
The boron system reacts in the flame retardant mechanism of halogenated flame retardant and boron halide zinc can capture active free radicals in the gas phase: HO, and h., interruption Ran around the chain reaction, can promote the generated in the solid phase density and solid carbide layer, at the same time at high temperature boride in combustible material surface vitreous solid material is coated on the surface material, cut off oxygen and heat effect. Zinc borate in more than 300 ℃ when releasing large amounts of water of crystallization in succession, have the effect of absorption of heat, cooling and smoke elimination.
In the gas phase, boric acid salt and halogenated organic compounds, three boron halide produce gas, it gives off hydrogen halide in the flame, to stop a chain reaction between highly reactive free radicals, to control the burning with such as catalysis, in addition, many boron and boron oxide of carbon-containing compounds showed inhibitory effect on the oxidation reaction, is a good antioxygen. In a spontaneous oxidation process, the proliferation of free radicals can be expressed as follows: R +O2 - RO2· RO2 +RH - ROOH+R
Trimethyl phosphate (TMP) use is mainly used in medicine, pesticides, solvents and extractants, used as a solvent, extraction, determination of zirconium and GC stationary liquid, the ester is used in medicine and pesticide solvent and extractant. Pesticide intermediates. In Japan, Trimethyl phosphate use as anti stain of textile oil and polymer, flame retardant additive for lithium ion battery.
Trimethyl phosphate is currently the main market in India, mostly for textile auxiliaries, the products are mainly exported to Japan, South Korea, Thailand, India.
As of Trimethyl phosphate use need to do not understand, please contact us!
These two reactions form a chain reaction. In the presence of boric acid, the peroxy of cracking is eliminated, and it interacts with boric acid to produce oxygen, hydrogen peroxide and borate. In the normal reaction temperature, boron is almost entirely in the form of boric acid and boron acid ester. Because they eliminated the peroxy RO2 from the oxidation reaction cracking, the chain termination reaction was accelerated and the total oxidation rate was slowed down.
The flame retardant mechanism of boron flame retardant has been introduced, and some of the products are described below. Developed at home and abroad of flame retardant zinc borate products mainly has four kinds: ultrafine zinc borate, thermal stability, zinc borate (commercial has 3 kinds, brand name is XP2187 respectively, the Fire 415 zb2233 Brake), dehydration zinc borate (XPI2187) and high water cut zinc borate (XPI2213).
Zinc borate new product the water temperature is 413 ℃ than standard zinc borate (about 110 ℃), and thus can be used in the processing of high temperature engineering plastics, such as poly ketone sulfone and polyether imide, etc. Flam tard Z10 particle size is 1.0 mu m, which is a good residual solvent for ethylene - acetate copolymer (EVA). Flam tard Z15 particle size is smaller, 0.6 mu m can be used for high - and transparent products.
Dehydration zinc borate XPI2187, high thermal stability, can be used in the 290 ℃ and processing of engineering plastics, plastic wire, cable and aircraft with laminate; Another product, XPI2213 borate, has a moisture content of up to 30%, especially for expansive coatings. The company also develops zinc and zinc borate for fiber to improve material processing and component dispersion. Another major producer of boron compounds is the Climax Metals Company, a subsidiary of AMAX, which in recent years has introduced a high temperature grade of zinc borate (ZB2233), which can be used in a variety of engineering plastics. Another kind of fine particle size borate zinc (ZB2467) has an average particle size of 1.5 ~ 2.0 Lm. The company developed the zinc borate zinc to be applied to thermoplastic engineering plastics.
The "NFR" series, developed by xizaki textile dyeing company, is made from a special compound containing boron. It can be used to improve the flame point of fiber and delay the spread of flame significantly. The main cause of death in a fire accident is the creation of toxic gases from the burners.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The flame retardant mechanism of boron flame retardant is an example of the flame retardant effect of boric acid and borax in fiber fabric. In the conventional case, the main pyrolysis of cellulose is dextran, and further decomposed into carbon monoxide, alkanes, ethanol, acetaldehyde, etc. After boron flame retardants are added, boron flame retardants are melted in flame, forming the outer layer of the glass, which insulates oxygen and heat.
The hydroxyl reaction of boron and cellulose in the coagulation phase produces boric acid ester, which inhibits the formation of dextran and reduces the combustible gas. Boric acid also causes ethanol to dehydrate. So when borates are pyrolytic with cellulose, they tend to have a lot of carbon.
Zinc borate is general and halogen flame retardants (RX) mix, to achieve better flame retardant effect, when exposed to fire, producing gaseous halogen boron, zinc halide, and release the zno crystal water 2, 3 of b2o3, 3.5 H2O + 22 znx2 RX - > 2 + 6 r2o bx3 + 11 + 3.5 H2O burning at the same time the HX continue to react with zinc borate generated halide boron and zinc halide. Zno, 3 b2o3, 3.5 2 H2O + 22 znx2 rx - > 2 + 6 bx3 + 14.5 H2O
The boron system reacts in the flame retardant mechanism of halogenated flame retardant and boron halide zinc can capture active free radicals in the gas phase: HO, and h., interruption Ran around the chain reaction, can promote the generated in the solid phase density and solid carbide layer, at the same time at high temperature boride in combustible material surface vitreous solid material is coated on the surface material, cut off oxygen and heat effect. Zinc borate in more than 300 ℃ when releasing large amounts of water of crystallization in succession, have the effect of absorption of heat, cooling and smoke elimination.
In the gas phase, boric acid salt and halogenated organic compounds, three boron halide produce gas, it gives off hydrogen halide in the flame, to stop a chain reaction between highly reactive free radicals, to control the burning with such as catalysis, in addition, many boron and boron oxide of carbon-containing compounds showed inhibitory effect on the oxidation reaction, is a good antioxygen. In a spontaneous oxidation process, the proliferation of free radicals can be expressed as follows: R +O2 - RO2· RO2 +RH - ROOH+R
Trimethyl phosphate (TMP) use is mainly used in medicine, pesticides, solvents and extractants, used as a solvent, extraction, determination of zirconium and GC stationary liquid, the ester is used in medicine and pesticide solvent and extractant. Pesticide intermediates. In Japan, Trimethyl phosphate use as anti stain of textile oil and polymer, flame retardant additive for lithium ion battery.
Trimethyl phosphate is currently the main market in India, mostly for textile auxiliaries, the products are mainly exported to Japan, South Korea, Thailand, India.
As of Trimethyl phosphate use need to do not understand, please contact us!
These two reactions form a chain reaction. In the presence of boric acid, the peroxy of cracking is eliminated, and it interacts with boric acid to produce oxygen, hydrogen peroxide and borate. In the normal reaction temperature, boron is almost entirely in the form of boric acid and boron acid ester. Because they eliminated the peroxy RO2 from the oxidation reaction cracking, the chain termination reaction was accelerated and the total oxidation rate was slowed down.
The flame retardant mechanism of boron flame retardant has been introduced, and some of the products are described below. Developed at home and abroad of flame retardant zinc borate products mainly has four kinds: ultrafine zinc borate, thermal stability, zinc borate (commercial has 3 kinds, brand name is XP2187 respectively, the Fire 415 zb2233 Brake), dehydration zinc borate (XPI2187) and high water cut zinc borate (XPI2213).
Zinc borate new product the water temperature is 413 ℃ than standard zinc borate (about 110 ℃), and thus can be used in the processing of high temperature engineering plastics, such as poly ketone sulfone and polyether imide, etc. Flam tard Z10 particle size is 1.0 mu m, which is a good residual solvent for ethylene - acetate copolymer (EVA). Flam tard Z15 particle size is smaller, 0.6 mu m can be used for high - and transparent products.
Dehydration zinc borate XPI2187, high thermal stability, can be used in the 290 ℃ and processing of engineering plastics, plastic wire, cable and aircraft with laminate; Another product, XPI2213 borate, has a moisture content of up to 30%, especially for expansive coatings. The company also develops zinc and zinc borate for fiber to improve material processing and component dispersion. Another major producer of boron compounds is the Climax Metals Company, a subsidiary of AMAX, which in recent years has introduced a high temperature grade of zinc borate (ZB2233), which can be used in a variety of engineering plastics. Another kind of fine particle size borate zinc (ZB2467) has an average particle size of 1.5 ~ 2.0 Lm. The company developed the zinc borate zinc to be applied to thermoplastic engineering plastics.
The "NFR" series, developed by xizaki textile dyeing company, is made from a special compound containing boron. It can be used to improve the flame point of fiber and delay the spread of flame significantly. The main cause of death in a fire accident is the creation of toxic gases from the burners.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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