Nano montmorillonite flame retardant

Nano montmorillonite flame retardant

Nano montmorillonite (MMT) is one of the most popular problems in the world, and nano-montmorillonite is widely studied due to its unique properties. Generally think that the smaller the particle size of clay particles, the greater the specific surface area, it and the stronger the polymer matrix resin interface binding force, thereby better integrated composite inorganic rigid particles and matrix resin, the advantages of high performance composite materials.

In recent years, through the interlayer inserted method will MMT to nanoscale dispersion in polymer, composition of polymer/clay 2 inorganic organic hybrid system, the original substrate material on various aspects performance can be greatly improved.

Modified nano montmorillonite has been studied that most of the performance of the material such as PA6, can paint of scholars such as application of natural fertility of the montmorillonite silicate layers as inorganic dispersed phase, the preparation of PA6 / clay nanocomposites with high strength, high modulus, good heat resistance, good barrier property, excellent processability characteristics.

However, the flame retardant mechanism of nano-montmorillonite flame retardant is controversial. Hu Yuan, scholars such as mentioned in the nanometer montmorillonite flame retardant system, polymer molecules bound in montmorillonite interlayer, the rotation of molecular chain and chain segment of peace movement is hugely block, so the polymer glass transition temperature is higher than that of pure PA6 about 90 BC. At the same time, the heat release rate of nano - montmorillonite flame retardant shows that the heat release rate and maximum exothermic peak of nano composite materials are significantly lower than that of pure PA6. Foreign scholars say that this nano-composite material, in the process of pyrolysis and combustion, forms a layer of carbon and silicate layers, which insulates and prevents the escaping of combustible gases.



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%.


A significant characteristic of polymer 2 nanometer composite material is that the flame retardant property of polymer material is improved obviously. Montmorillonite not only enhances the mechanical properties of polymer 2 nanocomposites, but also improves the flame retardancy of materials, reducing the heat release rate and the quality loss rate during combustion. However, the combustion specific heat, the unit extinction area (SEA) and CO production rate are unchanged, indicating that the performance improvement of the material group is due to the difference of the coagulation process. Nanocomposites improve the carbonization layer of the residue after combustion.

The carbonization layer is composed of layers of silicate carbonization layer, and there is a single layer of silicate carbonization layer. Explain the improvement of flame retardancy is not due to the retained portion of the fuel, but in the solid phase forming silicates carbonization layer, a multi-layer silicate carbonized layer structure, good insulation effect, and mass transfer carrier, slow combustion volatiles escape. The types of layered silicates, the degree of nanoscale dispersion, and the degradation of the process have an influence on the flame retardancy of clay nanocomposites. And MMT must reach the nanoscale dispersal to act as a flame retardant.

Flame retardant science and technology is a science to prevent fire occurrence and protect people's life and property in order to meet the needs of social security production and life. Flame retardant flame retardant technology is applied in the practical life, it is a kind of used to improve the combustible flammable materials combustion performance of special chemical additives, are widely used in the flame retardant in the processing of all kinds of decoration materials. After being processed by flame retardant, it can effectively prevent, delay or terminate the flame propagation, thus achieving the flame retardant effect. Different classification criteria can be divided into four categories. Halogen flame retardant, phosphor flame retardant, nitrogen flame retardant, phosphorus-halide flame retardant.

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.

Our flame retardant has developed into the second largest polymer material modified additive after plasticizer. In recent years, the production and consumption situation of flame retardants in China continues to develop, a sharp rise in the domestic consumption of flame retardant, increase the market share mainly comes from two aspects: the electronic appliances and automobile market.

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