Flame retardant system of flame retardant

Flame retardant system of flame retardant

The flame retardant system in flame retardant system refers to the flame retardant effect of the combustion interrupt or the delayed chain combustion reaction in the gas phase. The flame retardant in the following cases is the flame retardant of the flame.

(1) a free radical inhibitor can be produced when flame retardant materials are heated or burned, thereby interrupting the combustion chain reaction.

(2) when flame retardant materials are heated or burned, they generate small particles that promote free radicals to combine to abort a chain combustion reaction.

(3) when flame retardant materials are heated or burned, a large amount of inert gas or high-density steam is released. The former can dilute oxygen and gas combustible, and reduce the gas temperature, resulting in the suspension of combustion. The latter is covered in combustible gas, which insulates it from the air and thus suffocates the combustion. The volatile and low-boiling phosphorus compounds, such as trialkyl oxide (R3PO), belong to the gas flame retardant. Mass spectrometry analysis showed that triphenylphosphine acid ester and triphenylphosphine oxide cracking into the free radicals in the flame, these free radicals like halide capture h. o. and free radicals, thereby inhibit the action of the combustion chain reaction.

In the combustion and pyrolysis of red phosphorus, P is also formed, which reacts with the oxygen in the polymer to form the phosphate structure. In addition, the expansion of flame retardant system may also play a role in the gas phase, the amine compounds can be heated NH3, H2O and NO of two gases can be diluted before the oxygen concentration of flame area, which can make the quenching free radicals, burning depends on if the chain reaction.

Flame retardant mechanism of flame retardant system in flame retardant system. This refers to the flame retardant effect caused by the delay or interruption of the pyrolysis of flame retardant materials in condensed phases.

(1) flame retardants may delay or prevent pyrolysis of combustible gases and free radicals in condensed phases.

(2) inorganic filler in flame retardant material is larger than heat capacity, which makes the material not easy to reach the heat solution temperature through heat storage and thermal conduction.

(3) flame retardant is absorbed by heat and heat absorption, so that the flame retardant temperature rise is slowed down or suspended.

(4) the burning flame retardant materials generated on the surface of porous carbon layer, the layer of flame retardant, insulation, oxygen, and can prevent gas into the combustion gas phase, in order to maintain the combustion continue to burn, must have sufficient oxygen, combustible gas mixture. If the free radicals generated by the pyrolysis are trapped, the combustion slows down or interrupts. When flame retardant thermoplastic plastics containing organic bromide are burned, the following reactions are present.



Tris (2-Chloroethyl) Phosphate

Appearance: Pure Tris (2-Chloroethyl) Phosphate Is A Colorless Or Pale Yellow Oily Transparent Liquid With A Light Creamy Taste.

Refractive Index (N20D) 1.4731

Boiling Point Of 194 ° C, Flash Point Of 225 ° C

Freezing Point -64 ℃

Decomposition Temperature 240-280 ℃

Viscosity 38-47 Centipoise (20 ° C)

Phosphorus Content Of 10.8%

Chlorine Content Of 37.3%, With The General Organic Solvents (Such As Alcohol, Ketones, Aromatics, Chloroform, Etc.) Compatible, Insoluble In Aliphatic Hydrocarbons, Almost Insoluble In Water, And Hydrolytic Stability Is Good, In Alkaline Solution In A Small Amount Of Decomposition, The No Obvious Corrosion Of The Product.

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%.


RH, R·+ H chain

HO +CO=CO2+H· chain growth (high exothermic reaction)

H +O2= HO +O - chain branch

O +HBr= HO·-+Br - chain transfer

HO +HBr=H2O +Br - chain termination of highly reactive HO - free radicals plays a key role in the combustion process. The free radical chain reaction occurs when HO is replaced by a less reactive Br.

Flame retardant mechanism of flame retardant system in flame retardant system. This refers to the burning of some heat from the flame retardant material, which cannot maintain the thermal decomposition temperature and thus cannot maintain a flammable gas. For example, when the flame retardant materials by strong heat or burning can be melt, the molten material is easy to drop, and to take away most of the heat, reduce the heat feedback to the essence, the combustion delay, finally may terminate the combustion. Therefore, the flammability of fusible materials is usually low, but the drip of hot droplets can ignite other substances and increase the risk of fire.

The production and application of flame retardants have entered a steady stage of development after the vigorous development of the early 1980s. With the development of China synthetic material industry and application development in the field of flame retardants in chemical building materials, electronic appliances, transportation, aerospace, daily, to provide for furniture, interior decoration, and other fields has a broad market prospect. In addition, the fields such as coalfields, oil fields and forest fires have also promoted the rapid development of flame retardant and fire-extinguishing agents in China.

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