News Details
Soft polyurethane flame retardant
2017-10-18 17:07:47
Soft polyurethane flame retardant
Melamine soft polyurethane flame retardant of polyurethane foam initial decomposition temperature is 247 ℃, the decomposition process can be roughly divided into two phases, the first stage in 247 ℃ ~ 350 ℃, this stage weightlessness was 60%, that's because melamine in 330 ℃ ~ 350 ℃ sublimation, it can be seen from the DTG curve appears at 330 ℃ maximum decomposition rate.
The second phase in 350 ℃ ~ 400 ℃ of weightlessness was 30%, the activation energy of 307.72 kJ/mol. By comparison, after adding melamine, the decomposition temperature delayed about 10 ℃, the activation energy increases, shows that this add melamine is soft polyurethane flame retardants can improve the thermal stability of the polyurethane foam, at the beginning of the fire is not easy to decompose.
The maximum decomposition rate was advanced, and the maximum decomposition rate also increased, indicating that the flame retardant effect of melamine in flame retardant was early and the residual rate was lower. The decomposition process of the polyurethane flame retardant system is changed into three stages. The first phase of 234 ℃ ~ 234 ℃, weightlessness was 5%, the second phase 270 ℃ ~ 400 ℃, weightlessness was 35%, the third phase decomposition of 400 ℃ ~ 700 ℃, look from the trend of the curve, decomposition after 700 ℃, and 700 ℃ weightlessness is about 15%.
By comparison, has added two cyanide diamine FPUF the decrease of the activation energy is larger, the initial decomposition temperature and maximum decomposing rate corresponding to the temperature change is not big, it through the release of ammonia gas, such as at the beginning of decomposition, dilution of combustion play a role, complicating polyurethane foam decomposition process, decrease the decomposition rate a lot, as can be seen from the TG curve, the polyurethane foam was decomposed after 700 ℃, illustrates the added two cyanide diamine postponed the decomposition process of polyurethane foam.
After boric acid ammonium flame retardant, the initial decomposition temperature compared to the blank sample, well in advance, in the 130 ℃ begins to decompose, it has to do with literature reports of boric acid ammonium (NH4B5O8? 4 h2o) loss of hydration temperature 120 ℃ close to water.
Tert Benzyl diphenyl phosphate (BPDP-71B) physical and chemical properties
Appearance: colorless or light yellow liquid
Boiling point: 245-260 oC
Flash point: 224 oC
Water solubility: 0.1 g 100 mL at 21 oC
Phosphorus content (P%): BY 8.1
Specific gravity (D25): 1.177-1.187
Water%: 0.1MAX
Acid value (mgKOHg): 0.1MAX
Viscosity (38 ° C): 65-75
Color value (APHA): ≤100
Tert Benzyl diphenyl phosphate (BPDP-71B) use
Tert-butyl phosphate diphenyl phosphate, tert-butylated triphenyl phosphate is halogen-free organophosphorus flame retardant, using a new, excellent performance of phosphorus flame retardant, with excellent thermal stability and hydrolysis Sex. Its high thermal stability makes it as an engineering plastic flame retardant at the same time, can improve the plastic melting performance. Tert-butylated triphenyl phosphate for the liquid, in the resin can make its durability and hydrolysis stability is better, and easy to produce the table and stress cracking. It is widely used in flame retardant PV (, cellulose resin, into the rubber, phenolic resin, epoxy resin, polyene unit fiber.
The decomposition process can be roughly divided into three, 128 ℃ ~ 200 ℃, its gravity is 10%, the second phase is 200 ℃ ~ 300 ℃, weight loss is about 15%, the third stage of 300 ℃ ~ 400 ℃, weightlessness was 35%, and in 394 ℃ maximum decomposition rate, the apparent activation energy of 182.91 kJ/mol.
By comparing found that boric acid ammonium flame retardant polyurethane foam its decomposition process is more complicated, activation energy decreases, and decomposition temperature in advance, that boric acid ammonium on the initial decomposition of water and ammonia to fuel have the effect of the cooling and diluent, has played a certain flame retardant effect.
Added borax (Na2B4O7? 10 h2o), after its initial decomposition temperature is about 213 ℃, weightlessness can be divided into two phases, the first phase of 213 ℃ ~ 300 ℃, weightlessness was 25%, and at this stage to lose water of crystallization process, borax and lost during crystallization water all around 320 ℃, the second phase is 300 ℃ ~ 450 ℃, this stage weightlessness was 55%, the activation energy of 280.96 kJ/mol, visible borax flame retardant polyurethane soft foam increases the activation energy, the initial decomposition temperature in advance.
According to reports in the literature boron flame retardants is polyurethane foam effectively into charcoal promoter, generated during thermal decomposition of boric acid can react with alcohol to produce boric acid ester, boric acid ester is highly crosslinked into carbon precursor, can promote into carbon, at the same time form a glassy state inorganic coating, lead to the maximum decomposition rate is smaller than the sample lot, the residual rate is higher also.
The experimental results show that the flame retardant effect of ammonium borate is better than that of borax. Polyurethane soft foam containing ammonium chloride at 200 ℃ starts to break down, the decomposition process can be roughly divided into two, 200 ℃ ~ 300 ℃, this stage weightlessness was 40%, the second phase is 300 ℃ ~ 450 ℃, at this stage of weightlessness was 25%, the activation energy of 214.07 kJ/mol. It can be seen that when ammonium chloride is added, the activation energy can be reduced before the initial decomposition temperature.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Melamine soft polyurethane flame retardant of polyurethane foam initial decomposition temperature is 247 ℃, the decomposition process can be roughly divided into two phases, the first stage in 247 ℃ ~ 350 ℃, this stage weightlessness was 60%, that's because melamine in 330 ℃ ~ 350 ℃ sublimation, it can be seen from the DTG curve appears at 330 ℃ maximum decomposition rate.
The second phase in 350 ℃ ~ 400 ℃ of weightlessness was 30%, the activation energy of 307.72 kJ/mol. By comparison, after adding melamine, the decomposition temperature delayed about 10 ℃, the activation energy increases, shows that this add melamine is soft polyurethane flame retardants can improve the thermal stability of the polyurethane foam, at the beginning of the fire is not easy to decompose.
The maximum decomposition rate was advanced, and the maximum decomposition rate also increased, indicating that the flame retardant effect of melamine in flame retardant was early and the residual rate was lower. The decomposition process of the polyurethane flame retardant system is changed into three stages. The first phase of 234 ℃ ~ 234 ℃, weightlessness was 5%, the second phase 270 ℃ ~ 400 ℃, weightlessness was 35%, the third phase decomposition of 400 ℃ ~ 700 ℃, look from the trend of the curve, decomposition after 700 ℃, and 700 ℃ weightlessness is about 15%.
By comparison, has added two cyanide diamine FPUF the decrease of the activation energy is larger, the initial decomposition temperature and maximum decomposing rate corresponding to the temperature change is not big, it through the release of ammonia gas, such as at the beginning of decomposition, dilution of combustion play a role, complicating polyurethane foam decomposition process, decrease the decomposition rate a lot, as can be seen from the TG curve, the polyurethane foam was decomposed after 700 ℃, illustrates the added two cyanide diamine postponed the decomposition process of polyurethane foam.
After boric acid ammonium flame retardant, the initial decomposition temperature compared to the blank sample, well in advance, in the 130 ℃ begins to decompose, it has to do with literature reports of boric acid ammonium (NH4B5O8? 4 h2o) loss of hydration temperature 120 ℃ close to water.
Tert Benzyl diphenyl phosphate (BPDP-71B) physical and chemical properties
Appearance: colorless or light yellow liquid
Boiling point: 245-260 oC
Flash point: 224 oC
Water solubility: 0.1 g 100 mL at 21 oC
Phosphorus content (P%): BY 8.1
Specific gravity (D25): 1.177-1.187
Water%: 0.1MAX
Acid value (mgKOHg): 0.1MAX
Viscosity (38 ° C): 65-75
Color value (APHA): ≤100
Tert Benzyl diphenyl phosphate (BPDP-71B) use
Tert-butyl phosphate diphenyl phosphate, tert-butylated triphenyl phosphate is halogen-free organophosphorus flame retardant, using a new, excellent performance of phosphorus flame retardant, with excellent thermal stability and hydrolysis Sex. Its high thermal stability makes it as an engineering plastic flame retardant at the same time, can improve the plastic melting performance. Tert-butylated triphenyl phosphate for the liquid, in the resin can make its durability and hydrolysis stability is better, and easy to produce the table and stress cracking. It is widely used in flame retardant PV (, cellulose resin, into the rubber, phenolic resin, epoxy resin, polyene unit fiber.
The decomposition process can be roughly divided into three, 128 ℃ ~ 200 ℃, its gravity is 10%, the second phase is 200 ℃ ~ 300 ℃, weight loss is about 15%, the third stage of 300 ℃ ~ 400 ℃, weightlessness was 35%, and in 394 ℃ maximum decomposition rate, the apparent activation energy of 182.91 kJ/mol.
By comparing found that boric acid ammonium flame retardant polyurethane foam its decomposition process is more complicated, activation energy decreases, and decomposition temperature in advance, that boric acid ammonium on the initial decomposition of water and ammonia to fuel have the effect of the cooling and diluent, has played a certain flame retardant effect.
Added borax (Na2B4O7? 10 h2o), after its initial decomposition temperature is about 213 ℃, weightlessness can be divided into two phases, the first phase of 213 ℃ ~ 300 ℃, weightlessness was 25%, and at this stage to lose water of crystallization process, borax and lost during crystallization water all around 320 ℃, the second phase is 300 ℃ ~ 450 ℃, this stage weightlessness was 55%, the activation energy of 280.96 kJ/mol, visible borax flame retardant polyurethane soft foam increases the activation energy, the initial decomposition temperature in advance.
According to reports in the literature boron flame retardants is polyurethane foam effectively into charcoal promoter, generated during thermal decomposition of boric acid can react with alcohol to produce boric acid ester, boric acid ester is highly crosslinked into carbon precursor, can promote into carbon, at the same time form a glassy state inorganic coating, lead to the maximum decomposition rate is smaller than the sample lot, the residual rate is higher also.
The experimental results show that the flame retardant effect of ammonium borate is better than that of borax. Polyurethane soft foam containing ammonium chloride at 200 ℃ starts to break down, the decomposition process can be roughly divided into two, 200 ℃ ~ 300 ℃, this stage weightlessness was 40%, the second phase is 300 ℃ ~ 450 ℃, at this stage of weightlessness was 25%, the activation energy of 214.07 kJ/mol. It can be seen that when ammonium chloride is added, the activation energy can be reduced before the initial decomposition temperature.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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