News Details
Flame retardants for organic substances
2017-9-6 17:22:37
Flame retardants for organic substances
Halogen-containing polymer flame retardant of organic material retardant. Chlorinated polyethylene (CPE), chlorinated polyvinyl chloride (CPVC) due to the chlorine content is higher, at the same time will not degrade when burnt to produce unsaturated olefin, therefore does not produce harmful smoke too much, and favored by people. There were patent reports in the 1990s that replaced small amounts of PVC to enhance the flame retardancy of PVC.
The recipes in the literature mainly include PVC, CPE or CPVC, stabilizer, molybdenum series anti-smoking agent, ATH, various plasticizers (one of which is brominated aromatic ester plasticizer) and lubricant. With 10 ~ 30 CPE or CPVC instead of PVC, the oxygen index increased by 2 ~ 5 respectively according to the formula, and the amount of smoke was also decreased.
In addition, chloroprene rubber can be added, or other inorganic filler treated with chloroprene latex. Wang qingguo et al reported several new and low-cost fire retardant fillings, as well as the modified flame retardant packing prepared by nano-composite method. The flame retardant effect of PVC with non-halogen flame retardant packing made by chloroprene emulsion directly in clay is significantly higher than that of padded PVC.
Organic material retardant antimony, bismuth melamine halide halide. Bismuth melamine or antimony halide, their flame retardancy is more effective than the corresponding metal halide synergistic system. This is mainly due to the effect of metal halide in condensing phase and gas phase. In addition, melamine, ammonia and ammonium halide produced during degradation also play a role in the flame retardancy.
Flame retardant for zinc sulfide (ZnS) flame retardant. While Sb2O3 is still one of the most effective flame retardants in soft PVC, people are looking for alternatives because of its flaws. In recent years, ZnS has been considered as a flame retardant for PVC, especially in conjunction with Sb2O3.
Tris (2-Chloroethyl) Phosphate
There Are Three Industrial Methods: Phosphorus Oxychloride And Chloroethanol Reaction; Phosphorus Trichloride And Chloroethanol Reaction Reoxidation; Phosphorus Oxychloride And Ethylene Oxide Reaction (Industrial Commonly Used Method).
1, Phosphorus Oxychloride And Ethylene Oxide To Sodium Metavanadate As A Catalyst, At 50 ° C Reaction, The Reaction By Neutralization, Washing, Vacuum Dehydration Off The Low Boiling, That Is, The Finished Product. Chlorohydrin Can Also Be Used As Raw Materials, And Phosphorus Oxychloride Or Phosphorus Trichloride Reaction To Produce Tris (2-Chloro Ethyl) Phosphate.
2, 326 Kg Of Phosphorus Oxychloride And 1.0 Kg Of Sodium Metavanadate Into The Reactor. The Nitrogen In The Autoclave Was Driven By Nitrogen, And 650 Kg Of Ethylene Oxide Was Introduced Under Vacuum And Stirred At 45 To 50 ° C For 2 To 3 Hours. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated. Finished Product.
3. Put Phosphorus Oxychloride And Sodium Metaphosphate Into The Reactor. Nitrogen To Drive The Air, In The Vacuum Under The Access To Ethylene Oxide, At 45 ~ 50 ℃ Stirring 2 ~ 3h. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated Finished.
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
B.S chartel et al. compared the effects of using ZnS and Sb2O3 alone on PVC in the experiment. It was found that the samples of ZnS and Sb2O3 were used together, and the residue after combustion was more than the sample of the two. In addition, the sample THR and PHHR are also the best for collaborative use.
It can be seen that ZnS and Sb2O3 have good synergistic effect. After adding the medium amount of ZnS alone, the flame retardancy of the sample is greatly restricted due to the dilution effect. At the same time, it was found that this cooperative combination had certain anti-smoking effect, and the total amount of smoke released was the lowest in the cooperative use of ZnS and Sb2O3.
An expansive flame retardant containing silicate material. Most of the expansion of the expansion type flame retardant powder temperature is between 120 ~ 140 ℃, which greatly limits the type of flame retardants in thermoplastic materials. In July 2002, D.T.N guyen reported, such as a kind of expansion temperature is between 195 ~ 220 ℃ of new expansion type flame retardant powder, can satisfy the plasticizing temperature used in the thermoplastic material under 195 ℃.
This expansion type powder contains contains lithium oxide, alkaline silicate, this is a Li, Na, K Portland mixed alkali silicate powders, which is what makes the inflating powder can be used at such a high temperature, without inflation ahead of time. When the PVC is heated to the combustion temperature, the flame retardancy of the material can be improved because of the expansion.
Sulfate of low melting point. Recently, the use of low-melting sulfate glass and ceramics as flame retardants has achieved good results, but the flame retardant mechanism is lacking strong evidence. Again someone writing through the oxygen index, differential thermal analysis (DTA), thermogravimetric (TG), smoke density and scanning electron microscope (SEM) and other methods, prove that this kind of low melting point of sulfate glassy state Quality mainly through protecting the generated in the process of pyrolysis carbon film, so as to achieve the purpose of the flame retardant smoke suppression.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Halogen-containing polymer flame retardant of organic material retardant. Chlorinated polyethylene (CPE), chlorinated polyvinyl chloride (CPVC) due to the chlorine content is higher, at the same time will not degrade when burnt to produce unsaturated olefin, therefore does not produce harmful smoke too much, and favored by people. There were patent reports in the 1990s that replaced small amounts of PVC to enhance the flame retardancy of PVC.
The recipes in the literature mainly include PVC, CPE or CPVC, stabilizer, molybdenum series anti-smoking agent, ATH, various plasticizers (one of which is brominated aromatic ester plasticizer) and lubricant. With 10 ~ 30 CPE or CPVC instead of PVC, the oxygen index increased by 2 ~ 5 respectively according to the formula, and the amount of smoke was also decreased.
In addition, chloroprene rubber can be added, or other inorganic filler treated with chloroprene latex. Wang qingguo et al reported several new and low-cost fire retardant fillings, as well as the modified flame retardant packing prepared by nano-composite method. The flame retardant effect of PVC with non-halogen flame retardant packing made by chloroprene emulsion directly in clay is significantly higher than that of padded PVC.
Organic material retardant antimony, bismuth melamine halide halide. Bismuth melamine or antimony halide, their flame retardancy is more effective than the corresponding metal halide synergistic system. This is mainly due to the effect of metal halide in condensing phase and gas phase. In addition, melamine, ammonia and ammonium halide produced during degradation also play a role in the flame retardancy.
Flame retardant for zinc sulfide (ZnS) flame retardant. While Sb2O3 is still one of the most effective flame retardants in soft PVC, people are looking for alternatives because of its flaws. In recent years, ZnS has been considered as a flame retardant for PVC, especially in conjunction with Sb2O3.
Tris (2-Chloroethyl) Phosphate
There Are Three Industrial Methods: Phosphorus Oxychloride And Chloroethanol Reaction; Phosphorus Trichloride And Chloroethanol Reaction Reoxidation; Phosphorus Oxychloride And Ethylene Oxide Reaction (Industrial Commonly Used Method).
1, Phosphorus Oxychloride And Ethylene Oxide To Sodium Metavanadate As A Catalyst, At 50 ° C Reaction, The Reaction By Neutralization, Washing, Vacuum Dehydration Off The Low Boiling, That Is, The Finished Product. Chlorohydrin Can Also Be Used As Raw Materials, And Phosphorus Oxychloride Or Phosphorus Trichloride Reaction To Produce Tris (2-Chloro Ethyl) Phosphate.
2, 326 Kg Of Phosphorus Oxychloride And 1.0 Kg Of Sodium Metavanadate Into The Reactor. The Nitrogen In The Autoclave Was Driven By Nitrogen, And 650 Kg Of Ethylene Oxide Was Introduced Under Vacuum And Stirred At 45 To 50 ° C For 2 To 3 Hours. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated. Finished Product.
3. Put Phosphorus Oxychloride And Sodium Metaphosphate Into The Reactor. Nitrogen To Drive The Air, In The Vacuum Under The Access To Ethylene Oxide, At 45 ~ 50 ℃ Stirring 2 ~ 3h. Evaporation Of Excess Ethylene Oxide After Alkali Neutralization To Neutral, Washed, Vacuum Dehydrated Finished.
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
B.S chartel et al. compared the effects of using ZnS and Sb2O3 alone on PVC in the experiment. It was found that the samples of ZnS and Sb2O3 were used together, and the residue after combustion was more than the sample of the two. In addition, the sample THR and PHHR are also the best for collaborative use.
It can be seen that ZnS and Sb2O3 have good synergistic effect. After adding the medium amount of ZnS alone, the flame retardancy of the sample is greatly restricted due to the dilution effect. At the same time, it was found that this cooperative combination had certain anti-smoking effect, and the total amount of smoke released was the lowest in the cooperative use of ZnS and Sb2O3.
An expansive flame retardant containing silicate material. Most of the expansion of the expansion type flame retardant powder temperature is between 120 ~ 140 ℃, which greatly limits the type of flame retardants in thermoplastic materials. In July 2002, D.T.N guyen reported, such as a kind of expansion temperature is between 195 ~ 220 ℃ of new expansion type flame retardant powder, can satisfy the plasticizing temperature used in the thermoplastic material under 195 ℃.
This expansion type powder contains contains lithium oxide, alkaline silicate, this is a Li, Na, K Portland mixed alkali silicate powders, which is what makes the inflating powder can be used at such a high temperature, without inflation ahead of time. When the PVC is heated to the combustion temperature, the flame retardancy of the material can be improved because of the expansion.
Sulfate of low melting point. Recently, the use of low-melting sulfate glass and ceramics as flame retardants has achieved good results, but the flame retardant mechanism is lacking strong evidence. Again someone writing through the oxygen index, differential thermal analysis (DTA), thermogravimetric (TG), smoke density and scanning electron microscope (SEM) and other methods, prove that this kind of low melting point of sulfate glassy state Quality mainly through protecting the generated in the process of pyrolysis carbon film, so as to achieve the purpose of the flame retardant smoke suppression.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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