News Details
Flame retardant for flexible polyurethane
2017-10-31 11:39:23
Flame retardant for flexible polyurethane
With the rapid development of polyurethane industry, the amount of flame retardant used for flexible polyurethane is also rapidly expanding, and more and more flame retardants for flexible polyurethane are studied.
The melamine containing soft polyurethane flame retardant polyurethane foam that initial decomposition temperature is 247 DEG C, the decomposition process can be divided into two stages, the first stage in the 247 to 350 DEG C, the weight loss is 60%, this is because the substance melamine in 330 to 350 DEG C when the sublimation from the DTG curve can be see that at 330 C maximum decomposition rate.
The weight loss in the second stage is 30% at 350 and 400, and the activation energy is 307.72kJ/mol. By comparison, adding melamine, delayed the decomposition temperature of about 10 DEG C, the activation energy increased, indicating that the melamine soft polyurethane flame retardant to improve the thermal stability of polyurethane foam, not easy to decompose in the early fire.
The temperature of the maximum decomposition rate and the maximum decomposition rate were increased, which indicated that the flame retardant effect of melamine was earlier and the final residual rate was less when the flame retardant was flame retardant alone. Two cyanide two amine soft polyurethane flame retardant makes the process of decomposition of polyurethane flame retardant system into three stages. The first phase of 234 to 270 DEG C, weight loss is 5%, second stage 270 to 400 DEG C, weight loss was 35%, the third phase of the decomposition of 400 to 700 DEG C, from the curve trend, in 700 C can also be decomposed to 700 DEG C, weight loss was about 15%.
By comparison, adding two activated two amine FPUF cyanide can greatly reduce temperature, little change in the initial decomposition temperature and maximum decomposition rate corresponding to the instructions through the release of ammonia and other gases in the initial stage of decomposition, the dilution effect on combustion, the decomposition process of polyurethane foam is complicated so, the decomposition rate is reduced a lot, from the TG curve can be seen, 700 DEG C after the polyurethane foam also illustrates the decomposition, adding two cyanide two amine delayed the decomposition process of polyurethane foam.
After the flame retardant of ammonium borate, its initial decomposition temperature is much earlier than that of the blank sample, and it begins to decompose at 130. This is close to the reported temperature of 120 4H2O for the loss of hydrated water of ammonium borate (NH4B5O8).
The decomposition process can be divided into three processes, 128 to 200 DEG C, the weight loss is 10%, the second stage is 200 to 300 DEG C, weight loss of about 15%, third stage 300 to 400 DEG C, weight loss was 35%, and 394 degrees in the maximum decomposition rate, the apparent activation energy of 182.91kJ/mol.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
By comparison, the flame retardant polyurethane foam ammonium borate the decomposition process is complex, the activation energy decreases, the decomposition temperature in advance, that boric acid ammonium water and ammonia produced by decomposition in the early stage of the cooling and dilution effect of combustible materials, played a certain effect of flame retardant.
Add borax (Na2B4O7? 10H2O), the initial decomposition temperature of about 213 DEG C, weight loss can be divided into two phases, the first phase of 213 to 300 DEG C, weight loss is 25%, the process of loss of crystal water borax as this stage, and at around 320 degrees total loss of water of crystallization, the second stage is 300 DEG C this stage to 450 DEG C, weight loss is 55%, the activation energy is 280.96kJ/mol, the flame retardant polyurethane visible borax soft foam increases the activation energy of the initial decomposition temperature in advance.
According to reports in the literature of boron containing flame retardant is effective carbon forming accelerator of polyurethane foam, boric acid generated during thermal decomposition reaction of alcohols and the boric acid ester, boric acid ester is a carbon precursor highly cross-linked, can promote into carbon, while the formation of glassy inorganic intumescent coating, the maximum decomposition rate is much smaller than the sample the residual rate is also high.
The experimental results show that the flame retardant effect of ammonium borate is better than borax. At 200 degrees C began to decompose ammonium chloride containing soft polyurethane foam, the decomposition process can be divided into two processes, 200 to 300 DEG C, the weight loss is 40%, the second stage is 300 to 450 DEG C, this phase of the weight loss is 25%, the activation energy is 214.07kJ/mol. It can be seen that the activation energy decreases when the initial decomposition temperature is increased after adding ammonium chloride.
Because of containing chlorine and nitrogen in ammonium chloride, so in the initial stage of decomposition with ammonia and hydrogen chloride gas released a small amount of ammonium chloride, began to decompose and absorb a large amount of gas heat at 330 DEG C, a dilution and cooling effect on combustion material.
When the temperature increased to 350, the ammonium chloride began to sublimate, but the rate was slow. With the volatilization of ammonium chloride, the final residue was reduced obviously. The initial two ammonium hydrogen phosphate polyurethane soft foam decomposition temperature is 197 DEG C, the beginning stage can be divided into three phases, the first phase of 197 to 230 DEG C, this phase of the weight loss is 5%, second stage 230 to 350 DEG C, weight loss of about 25%, third stage 350 to 400 DEG C, weight loss about 30%, the activation energy is 178kJ/mol. It can be seen from Figure 11 that the decomposition can be divided into two processes, 200 to 300, and the weightlessness is 20%, and the second stage is 300 ~ 400. At this stage, the weight loss is 35% and the activation energy is 139.52kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
With the rapid development of polyurethane industry, the amount of flame retardant used for flexible polyurethane is also rapidly expanding, and more and more flame retardants for flexible polyurethane are studied.
The melamine containing soft polyurethane flame retardant polyurethane foam that initial decomposition temperature is 247 DEG C, the decomposition process can be divided into two stages, the first stage in the 247 to 350 DEG C, the weight loss is 60%, this is because the substance melamine in 330 to 350 DEG C when the sublimation from the DTG curve can be see that at 330 C maximum decomposition rate.
The weight loss in the second stage is 30% at 350 and 400, and the activation energy is 307.72kJ/mol. By comparison, adding melamine, delayed the decomposition temperature of about 10 DEG C, the activation energy increased, indicating that the melamine soft polyurethane flame retardant to improve the thermal stability of polyurethane foam, not easy to decompose in the early fire.
The temperature of the maximum decomposition rate and the maximum decomposition rate were increased, which indicated that the flame retardant effect of melamine was earlier and the final residual rate was less when the flame retardant was flame retardant alone. Two cyanide two amine soft polyurethane flame retardant makes the process of decomposition of polyurethane flame retardant system into three stages. The first phase of 234 to 270 DEG C, weight loss is 5%, second stage 270 to 400 DEG C, weight loss was 35%, the third phase of the decomposition of 400 to 700 DEG C, from the curve trend, in 700 C can also be decomposed to 700 DEG C, weight loss was about 15%.
By comparison, adding two activated two amine FPUF cyanide can greatly reduce temperature, little change in the initial decomposition temperature and maximum decomposition rate corresponding to the instructions through the release of ammonia and other gases in the initial stage of decomposition, the dilution effect on combustion, the decomposition process of polyurethane foam is complicated so, the decomposition rate is reduced a lot, from the TG curve can be seen, 700 DEG C after the polyurethane foam also illustrates the decomposition, adding two cyanide two amine delayed the decomposition process of polyurethane foam.
After the flame retardant of ammonium borate, its initial decomposition temperature is much earlier than that of the blank sample, and it begins to decompose at 130. This is close to the reported temperature of 120 4H2O for the loss of hydrated water of ammonium borate (NH4B5O8).
The decomposition process can be divided into three processes, 128 to 200 DEG C, the weight loss is 10%, the second stage is 200 to 300 DEG C, weight loss of about 15%, third stage 300 to 400 DEG C, weight loss was 35%, and 394 degrees in the maximum decomposition rate, the apparent activation energy of 182.91kJ/mol.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
By comparison, the flame retardant polyurethane foam ammonium borate the decomposition process is complex, the activation energy decreases, the decomposition temperature in advance, that boric acid ammonium water and ammonia produced by decomposition in the early stage of the cooling and dilution effect of combustible materials, played a certain effect of flame retardant.
Add borax (Na2B4O7? 10H2O), the initial decomposition temperature of about 213 DEG C, weight loss can be divided into two phases, the first phase of 213 to 300 DEG C, weight loss is 25%, the process of loss of crystal water borax as this stage, and at around 320 degrees total loss of water of crystallization, the second stage is 300 DEG C this stage to 450 DEG C, weight loss is 55%, the activation energy is 280.96kJ/mol, the flame retardant polyurethane visible borax soft foam increases the activation energy of the initial decomposition temperature in advance.
According to reports in the literature of boron containing flame retardant is effective carbon forming accelerator of polyurethane foam, boric acid generated during thermal decomposition reaction of alcohols and the boric acid ester, boric acid ester is a carbon precursor highly cross-linked, can promote into carbon, while the formation of glassy inorganic intumescent coating, the maximum decomposition rate is much smaller than the sample the residual rate is also high.
The experimental results show that the flame retardant effect of ammonium borate is better than borax. At 200 degrees C began to decompose ammonium chloride containing soft polyurethane foam, the decomposition process can be divided into two processes, 200 to 300 DEG C, the weight loss is 40%, the second stage is 300 to 450 DEG C, this phase of the weight loss is 25%, the activation energy is 214.07kJ/mol. It can be seen that the activation energy decreases when the initial decomposition temperature is increased after adding ammonium chloride.
Because of containing chlorine and nitrogen in ammonium chloride, so in the initial stage of decomposition with ammonia and hydrogen chloride gas released a small amount of ammonium chloride, began to decompose and absorb a large amount of gas heat at 330 DEG C, a dilution and cooling effect on combustion material.
When the temperature increased to 350, the ammonium chloride began to sublimate, but the rate was slow. With the volatilization of ammonium chloride, the final residue was reduced obviously. The initial two ammonium hydrogen phosphate polyurethane soft foam decomposition temperature is 197 DEG C, the beginning stage can be divided into three phases, the first phase of 197 to 230 DEG C, this phase of the weight loss is 5%, second stage 230 to 350 DEG C, weight loss of about 25%, third stage 350 to 400 DEG C, weight loss about 30%, the activation energy is 178kJ/mol. It can be seen from Figure 11 that the decomposition can be divided into two processes, 200 to 300, and the weightlessness is 20%, and the second stage is 300 ~ 400. At this stage, the weight loss is 35% and the activation energy is 139.52kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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