News Details
Foamed plastic flame retardant
2017-10-14 11:36:52
Foamed plastic flame retardant
This article chooses the phosphorus, chlorine, boron, such as nitrogen, phosphorus - nitrogen foam plastics flame retardants by dipping the way to deal with soft polyurethane foam, and using the thermal analysis method, to test its thermal decomposition, the results show that after adding foam plastics flame retardants and weightlessness of soft polyurethane foam process become more complex, the influence of the apparent activation energy of pyrolysis reaction has been greatly, and found that sodium hexametaphosphate of soft polyurethane foam has good flame retardant effect.
Polyurethane foam due to containing combustible hydrocarbon chain segment, density is small, than the area is large, without flame retardant processing of polyurethane foam is fuel, in case of fire combustion and decomposition, to produce large amounts of toxic smoke, bring great difficulty in evacuation and fire fighting.
Especially soft polyurethane foams (FPUF) opening rate is higher, combustibles, burning due to high air liquidity continuously supply oxygen, combustible and self-extinguishing not easily, easy to cause major fire accident group die group of injury, for example, in December 2000, east henan luoyang malls extra-large fire, because the staff violate compasses operation on the welding welding spark splash to fuel such as inventory sponge mattress, sofa, failed to timely control and spread to the casino on the fourth floor, killing 309 people poisoning choke.
Now with the development of the economy, the use of polyurethane foam has increased greatly, and the flame retardant demand for polyurethane foam has become more and more urgent. There are some changes in the decomposition of polyurethane foam plastics after flame retardant treatment of foamed plastic flame retardant. No systematic study report has been reported. In this paper, the influence of various foamed plastic flame retardants on thermal decomposition of polyurethane foam is studied by thermal analysis.
Experimental drugs: ammonium polyphosphate, potassium dihydrogen phosphate, ammonium chloride, dicyanide, dihydrogen phosphate, melamine, borax, ammonium borate, sodium hexametaphosphate (both chemically pure).
Will be growing polyurethane soft foam cutting high are the shape of 50 mm wide, according to the proportion of 40% will be flame retardant were dissolved in distilled water, soft polyurethane foams to be included in the above solution, extrusion soak for 10 min, edging out redundant solution, and put it in the oven drying under 100 ℃. The polyurethane soft foam blank sample cut to pieces, with electronic balance in about 5 mg standard crucible, regulate the temperature of a thermal analyzer starting up from 50 ℃ 700 ℃, heating rate is 10 ℃ / min, under the atmosphere of nitrogen (30 ml/min) for experimental analysis.
Isopropylphenyl Phosphate(IPPP50)Use:
Isopropylphenyl Phosphate, Flame Retardant IPPP50 This Product Is Compatible With Vinyl Chloride, Nitrocellulose, Synthetic Resin And Natural Resin, Etc. Because Of The Above Advantages, Reofos Series In Industrial Production Is Widely Used: PVC Film As Flame Retardant Plasticizer, Reofos Increase In The Amount Of Oxygen Index Increased, Enhanced Flame Retardant. In The Rubber Industry Can Be Used As Chloroprene Rubber And Rubber Flame Retardant Plasticizer; In Other Industries Can Be Used As Lubricants With Extreme Pressure Additives And Digestion Of Cellulose Paint, Resin, Phenol Resin And Other Flame Retardants.
Isopropylphenyl Phosphate, Flame Retardant IPPP50 Use Is Also Applicable To Fabric Coating, Circuit Boards, Flooring, Textiles, PVC, Phenolic Resin And Other Fields.
Can be seen from the thermal analysis results, the soft polyurethane foam has been decomposed under 235.37 ℃, the decomposition process can be roughly divided into 230 ℃ ~ 350 ℃, 350 ℃ ~ 410 ℃ of two important gravity changes occur in the temperature range, at the beginning of the decomposition (230 ~ 350 ℃), the decomposition rate is slow, this stage of about 25%.
In the process, the main products are isocyanates, polyols, ammonia and carbon dioxide, etc., and isocyanates are volatilize in yellow, resulting in loss of quality. When the temperature rose to 350 ℃, the decomposition rate of acceleration, the weightlessness also increases, weightlessness in 350 ℃ ~ 410 ℃ this stage is about 60%. This stage is mainly in the form of residues in the form of the polyols, starting to decompose the quality loss caused by the release of ethylene, ethane, formaldehyde, propylene, ethylene oxide, acetone and isopropyl alcohol.
Temperature above 500 ℃ quality basically unchanged, the polyurethane residue weight of about 15%. We can also see from the DTG graphs of soft polyurethane foams, there are two large weight loss peak, shows decomposition weightlessness mainly in these two stages, and in 384 ℃ maximum decomposition rate.
Add sodium hexametaphosphate polyurethane soft foam in 219.53 ℃ starts to break down, seen from the DTG curves of the weight loss process is relatively complex, which can be roughly divided into three stages in weightlessness: 219 ℃ ~ 230 ℃, 230 ℃ ~ 350 ℃, 350 ℃ ~ 400 ℃. In the first stage, the weight loss is about 3%, which is low in temperature and low in weight, and has little effect on the decomposition of foam. The second stage of weightlessness is about 16 percent, the third stage is about 13 percent, and the activation energy is 147.17 kJ/mol.
Add the potassium dihydrogen phosphate, compared with the blank sample decomposition temperature in advance, decomposition process is relatively complex, can be divided into three stages of weightlessness, 219 ℃ ~ 230 ℃, the stage of weightlessness is about 5% less, have less effect on the decomposition of foam; 230 ℃ ~ 300 ℃, the second phase of weightlessness is approximately 20%; 300 ℃ ~ 400 ℃, and the third phase of weightlessness is about 25%, the activation energy of 121.75 kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
This article chooses the phosphorus, chlorine, boron, such as nitrogen, phosphorus - nitrogen foam plastics flame retardants by dipping the way to deal with soft polyurethane foam, and using the thermal analysis method, to test its thermal decomposition, the results show that after adding foam plastics flame retardants and weightlessness of soft polyurethane foam process become more complex, the influence of the apparent activation energy of pyrolysis reaction has been greatly, and found that sodium hexametaphosphate of soft polyurethane foam has good flame retardant effect.
Polyurethane foam due to containing combustible hydrocarbon chain segment, density is small, than the area is large, without flame retardant processing of polyurethane foam is fuel, in case of fire combustion and decomposition, to produce large amounts of toxic smoke, bring great difficulty in evacuation and fire fighting.
Especially soft polyurethane foams (FPUF) opening rate is higher, combustibles, burning due to high air liquidity continuously supply oxygen, combustible and self-extinguishing not easily, easy to cause major fire accident group die group of injury, for example, in December 2000, east henan luoyang malls extra-large fire, because the staff violate compasses operation on the welding welding spark splash to fuel such as inventory sponge mattress, sofa, failed to timely control and spread to the casino on the fourth floor, killing 309 people poisoning choke.
Now with the development of the economy, the use of polyurethane foam has increased greatly, and the flame retardant demand for polyurethane foam has become more and more urgent. There are some changes in the decomposition of polyurethane foam plastics after flame retardant treatment of foamed plastic flame retardant. No systematic study report has been reported. In this paper, the influence of various foamed plastic flame retardants on thermal decomposition of polyurethane foam is studied by thermal analysis.
Experimental drugs: ammonium polyphosphate, potassium dihydrogen phosphate, ammonium chloride, dicyanide, dihydrogen phosphate, melamine, borax, ammonium borate, sodium hexametaphosphate (both chemically pure).
Will be growing polyurethane soft foam cutting high are the shape of 50 mm wide, according to the proportion of 40% will be flame retardant were dissolved in distilled water, soft polyurethane foams to be included in the above solution, extrusion soak for 10 min, edging out redundant solution, and put it in the oven drying under 100 ℃. The polyurethane soft foam blank sample cut to pieces, with electronic balance in about 5 mg standard crucible, regulate the temperature of a thermal analyzer starting up from 50 ℃ 700 ℃, heating rate is 10 ℃ / min, under the atmosphere of nitrogen (30 ml/min) for experimental analysis.
Isopropylphenyl Phosphate(IPPP50)Use:
Isopropylphenyl Phosphate, Flame Retardant IPPP50 This Product Is Compatible With Vinyl Chloride, Nitrocellulose, Synthetic Resin And Natural Resin, Etc. Because Of The Above Advantages, Reofos Series In Industrial Production Is Widely Used: PVC Film As Flame Retardant Plasticizer, Reofos Increase In The Amount Of Oxygen Index Increased, Enhanced Flame Retardant. In The Rubber Industry Can Be Used As Chloroprene Rubber And Rubber Flame Retardant Plasticizer; In Other Industries Can Be Used As Lubricants With Extreme Pressure Additives And Digestion Of Cellulose Paint, Resin, Phenol Resin And Other Flame Retardants.
Isopropylphenyl Phosphate, Flame Retardant IPPP50 Use Is Also Applicable To Fabric Coating, Circuit Boards, Flooring, Textiles, PVC, Phenolic Resin And Other Fields.
Can be seen from the thermal analysis results, the soft polyurethane foam has been decomposed under 235.37 ℃, the decomposition process can be roughly divided into 230 ℃ ~ 350 ℃, 350 ℃ ~ 410 ℃ of two important gravity changes occur in the temperature range, at the beginning of the decomposition (230 ~ 350 ℃), the decomposition rate is slow, this stage of about 25%.
In the process, the main products are isocyanates, polyols, ammonia and carbon dioxide, etc., and isocyanates are volatilize in yellow, resulting in loss of quality. When the temperature rose to 350 ℃, the decomposition rate of acceleration, the weightlessness also increases, weightlessness in 350 ℃ ~ 410 ℃ this stage is about 60%. This stage is mainly in the form of residues in the form of the polyols, starting to decompose the quality loss caused by the release of ethylene, ethane, formaldehyde, propylene, ethylene oxide, acetone and isopropyl alcohol.
Temperature above 500 ℃ quality basically unchanged, the polyurethane residue weight of about 15%. We can also see from the DTG graphs of soft polyurethane foams, there are two large weight loss peak, shows decomposition weightlessness mainly in these two stages, and in 384 ℃ maximum decomposition rate.
Add sodium hexametaphosphate polyurethane soft foam in 219.53 ℃ starts to break down, seen from the DTG curves of the weight loss process is relatively complex, which can be roughly divided into three stages in weightlessness: 219 ℃ ~ 230 ℃, 230 ℃ ~ 350 ℃, 350 ℃ ~ 400 ℃. In the first stage, the weight loss is about 3%, which is low in temperature and low in weight, and has little effect on the decomposition of foam. The second stage of weightlessness is about 16 percent, the third stage is about 13 percent, and the activation energy is 147.17 kJ/mol.
Add the potassium dihydrogen phosphate, compared with the blank sample decomposition temperature in advance, decomposition process is relatively complex, can be divided into three stages of weightlessness, 219 ℃ ~ 230 ℃, the stage of weightlessness is about 5% less, have less effect on the decomposition of foam; 230 ℃ ~ 300 ℃, the second phase of weightlessness is approximately 20%; 300 ℃ ~ 400 ℃, and the third phase of weightlessness is about 25%, the activation energy of 121.75 kJ/mol.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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