The effect of flame retardants

The effect of flame retardants

Most macromolecule materials, whether natural or synthetic, are burned by fire. The flame retardant is a kind of auxiliary agent which can prevent the material from being ignited or inhibit the spread of flame. The role of the flame retardant is the synthetic polymer materials or natural polymer material flame retardant. In polymer materials processing into the flame retardants, can reduce the flammability of polymeric materials, can make the polymer material when contact with flame, burning rapidly slowing, self-extinguishing can leave after the fire quickly. Note that the materials containing flame retardant can not be used as non-combustible materials. They can only reduce fire hazards, not eliminate fire hazards.

The requirements for flame retardants are multifaceted. People hope flame retardants in the case of low dosage has durable flame retardant effect; hope when burning flame retardant non-toxic, generate toxic gas and smoke, hope flame retardants have high thermal stability, in case of cases will not decompose or volatile; hope based mechanical properties and physical properties of the resin will not loss or decrease due to the use of flame retardants. Should be between the flame retardancy and other properties of the material to seek the best sex/price ratio (effect thewire/cost), but not too much lower in original good performance at the cost of materials, to meet the requirements of flame retardant high performance blindly. In addition, while improving the flame retardation of materials, the effect of flame retardants should be minimized to reduce the heat decomposition of materials or the amount of toxic gases generated by combustion. In the field of flame retardant, flame retardant and smoke suppression are complementary.

The flame retardant is mainly phosphorous, halogen, boron, antimony, lead, molybdenum, etc. According to its usage, flame retardants are generally divided into additive and reactive types. Additive flame retardants are simple to participate and mix in plastics during the process of plastic processing. The effect of additive flame retardants is thermoplastic. Reactive flame retardants are used in polymer synthesis as a component to participate in reaction, and bond to polymer molecular chains, mostly used in thermosetting resins. Some reactive flame retardants can also be added to plastic processing.

According to chemical structure, flame retardant can be divided into inorganic flame retardant and organic flame retardant. Inorganic flame retardants such as aluminum, antimony, zinc, molybdenum, phosphate, boric acid salt, metal oxide such as sulfate; organic flame retardants including fat containing halogen hydrocarbon and aromatic hydrocarbons, organic phosphorus compounds,halogenated organic phosphorus compounds, etc.



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%.


Flame retardant flame retardant according to the function of main elements can also be divided into halogen flame retardants, phosphate flame retardants, and aluminum, antimony, boron, molybdenum and other metal oxide flame retardant; also can be divided into bromine series by large categories, phosphorus, chlorine and aluminum, boron, antimonic flame retardants, etc. Reactive flame retardant resin with a certain chemical reactions, namely between flame retardants and resin have a combination of keys, so reactive flame retardant resin in more stable, its inhibitory effect on flame usually lasting than adding type, impact on the performance of the material smaller, but the operation and processing technology is more complicated. However, additive flame retardants are only mixed with resin and have no chemical reaction, which can be used in a large amount and convenient operation. Therefore, it becomes a widely used flame retardant system.

The combustion of flame retardants is a very complex process of rapid oxidation, from the heat of the material to the intense oxidative luminescence, including a series of physical changes and chemical changes. When the polymer is subjected to the external heat source, it is first heated and then degraded and produced volatile combustible gas and other thermal decomposition products. As the concentration of combustible gas increases, the polymer burns when it reaches a certain limit.

The combustion mode, polymer in under the action of heat source, first decomposition of combustible gas, combustible gas is produced from the solid phase diffusion to the gas phase and gas phase of combustible gas and oxygen reaction and the heat generated by the started burning, burning to the polymer surface radiation and to polymer internal and will continue polymer due to the effect of thermal decomposition, the formation of combustion cycle. So the flame retardant is the process that inhibits the combustion.

The product of different polymer thermal decomposition determines the degree of difficulty of polymer combustion, so different polymers have different combustion properties. The same polymer due to add to the difficulty of the different additives its combustion also have change, when added to PVC plasticizer products tend to become easy to burn, while adding flame retardant products difficult to burn. The purpose of flame retardant is to improve the degree of incombustibility of the products, reduce the possibility of fire and make the products non-combustible materials.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd