News Details
Halogen free flame retardant
2017-10-5 12:01:48
Halogen free flame retardant
The variety of modern macromolecule material is more and more numerous, the performance is obtained greatly greatly, make it can replace more and more material, use also more and more widely. And the common polymer material is basically flammable, so the flame retardant of the polymer material is a very important subject.
It was observed that after adding Sb2O3 to polyvinyl chloride (PVC), it had a good flame retardant effect, thus the effect of halogen antimony was discovered. Therefore, halogen flame retardants have been widely used in polymer flame retardant materials for a long period of time.
However, after in-depth study of the fire scene, it was concluded that the polymer with halogen flame retardant would produce a large amount of toxic, corrosive gas and smoke during combustion. The danger is more serious than the fire itself. Therefore, people have to start developing a flame retardant that does not produce toxic, corrosive gases and smoke less in the combustion process). But compared to halogen flame retardants, halogen-free flame retardants is a new type of flame retardant, the development of technology is not mature, and there are many deficiencies, such as flame retardant efficiency is not high, a great influence on system processing performance, mechanical performance, etc. So halogen - free flame retardants require a great deal of improvement.
Flame retardant mechanism of halogen free flame retardant. The common in halogen flame retardants are Mg(OH)2(MDH) and Al(OH)3 (ATH). This type of material containing water of crystallization, in fact, can be represented as MgO# H2O and Al2O3 # 3 H2O, the flame retardant mechanism of:
(1) the decomposition of absorption of heat, and absorb radiation from the flame, for cooling, promote the dehydrogenation reaction and protect the carbon layer;
(2) the decomposition of water is not only a coolant, but also a diluent, and the water vapor is like a blanket that surrounds the flame;
(3) the metal hydroxide layer formed by dehydration has a very high surface area, which can absorb smoke and combustible materials, so as to reduce the amount of CO2 released when the material burns.
(4)ATH and MDH can be used as electron donor to terminate the free radical reaction, and generate the low-active element radical free radicals, which cannot trigger free radical reactions. In normal measurement, the heat flow into the high polymer matrix is too low to generate sufficient combustible vapor to sustain the combustion propagation and thus extinguish the flame.
Research progress of inorganic filler system. No type of flame retardant has the advantages of less smoke and no harmful gas when burning. But its own flame retardant efficiency is not high, fill a lot of flame retardant to be able to achieve certain effect. Therefore, it is necessary to modify the flame retardant or add flame retardant to achieve better flame retardant effect.
Cresyl Diphenyl Phosphate(CDP) The Production Process
(1) Mixing M-Cresol And Molten Phenol, And Then Adding Calcium And Magnesium Catalyst; When The Temperature Is Less Than 50 ℃, Adding Phosphorus Oxychloride, The Mixture; The Mixture And Then Pressure Row Acid, Negative Pressure Row Acid, The Negative Pressure Distillation Separation, Vacuum System Vacuum ≥ 0.0983Mpa, Collecting The Temperature Of The Fraction At 290 ~ 310 ℃ When The Resulting Fractions, Measured The Acid Value ≤ 0.15mgKOH / G, That Is, Toluene Diphenyl Phosphate. The Production Process Is Simple And The Cost Is Low. The Prepared Toluene Diphenyl Phosphate (Flame Retardant CDP) Conforms To The Standard Of Toluene Diphenyl Phosphate (Flame Retardant CDP), The Yield Is Over 88%, Plasticizer, And Has Good Compatibility, Electrical Insulation, Good Hydrolytic Stability, High Plasticizing Efficiency, Good Wear Resistance Of The Products; Can Be Used In Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Alcohol Shrink Aldehydes, Nitrocellulose, Cellulose Acetate, Butyl Acetate Cellulose, Cellulose Resins, Natural And Synthetic Rubbers, And The Like.
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
Super refining and nanotechnology. When the material reaches the nanometer level, the granules possess new properties that are not in general particles, such as high strength, high hardness, thermal shock resistance and oxidation resistance. And to some extent, it makes up for many disadvantages and problems such as the decrease of physical mechanical properties of products such as physical mechanical properties of products and difficult molding process. The applications of nano-technology are: MDH and ATH nanoparticles, which can improve the flame retardancy of materials to a certain extent. The degradation of the mechanical properties and flame retardation performance of the inorganic filler system was improved by adding nano montmorillonite.
Flame retardant filler particle size and product performance has a close relationship, research shows that: its role in flame retardant is dominated by a chemical reaction, so the same amount of flame retardant, the particle size is smaller, the greater the specific surface area, flame retardant effect is better.
Surface treatment and coating technology. At present, the inorganic or organic flame retardants (Microencapsulation) microcapsules research is in the midst of the fire retardant technology of hot spots, and has developed from stage into the practical phase. The essence of microencapsulation is to make a microencapsulated flame retardant by wrapping the flame retardant with organic or inorganic substance. Or with a larger than surface area, the flame retardant can be absorbed into the gap of these inorganic carriers to form a honeycomb micro-capsule flame retardant. The microencapsulation has the following characteristics:
(1) to improve the compatibility of flame retardants and polymers, to some extent, to improve the performance of physical mechanical properties;
(2) improving the thermal stability of flame retardants;
(3) improve the performance of flame retardants and expand their application range.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The variety of modern macromolecule material is more and more numerous, the performance is obtained greatly greatly, make it can replace more and more material, use also more and more widely. And the common polymer material is basically flammable, so the flame retardant of the polymer material is a very important subject.
It was observed that after adding Sb2O3 to polyvinyl chloride (PVC), it had a good flame retardant effect, thus the effect of halogen antimony was discovered. Therefore, halogen flame retardants have been widely used in polymer flame retardant materials for a long period of time.
However, after in-depth study of the fire scene, it was concluded that the polymer with halogen flame retardant would produce a large amount of toxic, corrosive gas and smoke during combustion. The danger is more serious than the fire itself. Therefore, people have to start developing a flame retardant that does not produce toxic, corrosive gases and smoke less in the combustion process). But compared to halogen flame retardants, halogen-free flame retardants is a new type of flame retardant, the development of technology is not mature, and there are many deficiencies, such as flame retardant efficiency is not high, a great influence on system processing performance, mechanical performance, etc. So halogen - free flame retardants require a great deal of improvement.
Flame retardant mechanism of halogen free flame retardant. The common in halogen flame retardants are Mg(OH)2(MDH) and Al(OH)3 (ATH). This type of material containing water of crystallization, in fact, can be represented as MgO# H2O and Al2O3 # 3 H2O, the flame retardant mechanism of:
(1) the decomposition of absorption of heat, and absorb radiation from the flame, for cooling, promote the dehydrogenation reaction and protect the carbon layer;
(2) the decomposition of water is not only a coolant, but also a diluent, and the water vapor is like a blanket that surrounds the flame;
(3) the metal hydroxide layer formed by dehydration has a very high surface area, which can absorb smoke and combustible materials, so as to reduce the amount of CO2 released when the material burns.
(4)ATH and MDH can be used as electron donor to terminate the free radical reaction, and generate the low-active element radical free radicals, which cannot trigger free radical reactions. In normal measurement, the heat flow into the high polymer matrix is too low to generate sufficient combustible vapor to sustain the combustion propagation and thus extinguish the flame.
Research progress of inorganic filler system. No type of flame retardant has the advantages of less smoke and no harmful gas when burning. But its own flame retardant efficiency is not high, fill a lot of flame retardant to be able to achieve certain effect. Therefore, it is necessary to modify the flame retardant or add flame retardant to achieve better flame retardant effect.
Cresyl Diphenyl Phosphate(CDP) The Production Process
(1) Mixing M-Cresol And Molten Phenol, And Then Adding Calcium And Magnesium Catalyst; When The Temperature Is Less Than 50 ℃, Adding Phosphorus Oxychloride, The Mixture; The Mixture And Then Pressure Row Acid, Negative Pressure Row Acid, The Negative Pressure Distillation Separation, Vacuum System Vacuum ≥ 0.0983Mpa, Collecting The Temperature Of The Fraction At 290 ~ 310 ℃ When The Resulting Fractions, Measured The Acid Value ≤ 0.15mgKOH / G, That Is, Toluene Diphenyl Phosphate. The Production Process Is Simple And The Cost Is Low. The Prepared Toluene Diphenyl Phosphate (Flame Retardant CDP) Conforms To The Standard Of Toluene Diphenyl Phosphate (Flame Retardant CDP), The Yield Is Over 88%, Plasticizer, And Has Good Compatibility, Electrical Insulation, Good Hydrolytic Stability, High Plasticizing Efficiency, Good Wear Resistance Of The Products; Can Be Used In Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Alcohol Shrink Aldehydes, Nitrocellulose, Cellulose Acetate, Butyl Acetate Cellulose, Cellulose Resins, Natural And Synthetic Rubbers, And The Like.
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
Super refining and nanotechnology. When the material reaches the nanometer level, the granules possess new properties that are not in general particles, such as high strength, high hardness, thermal shock resistance and oxidation resistance. And to some extent, it makes up for many disadvantages and problems such as the decrease of physical mechanical properties of products such as physical mechanical properties of products and difficult molding process. The applications of nano-technology are: MDH and ATH nanoparticles, which can improve the flame retardancy of materials to a certain extent. The degradation of the mechanical properties and flame retardation performance of the inorganic filler system was improved by adding nano montmorillonite.
Flame retardant filler particle size and product performance has a close relationship, research shows that: its role in flame retardant is dominated by a chemical reaction, so the same amount of flame retardant, the particle size is smaller, the greater the specific surface area, flame retardant effect is better.
Surface treatment and coating technology. At present, the inorganic or organic flame retardants (Microencapsulation) microcapsules research is in the midst of the fire retardant technology of hot spots, and has developed from stage into the practical phase. The essence of microencapsulation is to make a microencapsulated flame retardant by wrapping the flame retardant with organic or inorganic substance. Or with a larger than surface area, the flame retardant can be absorbed into the gap of these inorganic carriers to form a honeycomb micro-capsule flame retardant. The microencapsulation has the following characteristics:
(1) to improve the compatibility of flame retardants and polymers, to some extent, to improve the performance of physical mechanical properties;
(2) improving the thermal stability of flame retardants;
(3) improve the performance of flame retardants and expand their application range.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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