News Details
Environmental friendly polyurethane flame retardant
2017-11-10 15:34:54
Environmental friendly polyurethane flame retardant
Polyurethane material is the best thermal insulation material at present in the world. A class of polymers containing NHCOO - repeating structural units in the main chain. English abbreviation PU. Polymerization of isocyanate (monomer) with hydroxyl compounds. Because of the strong polarity of urethane group, insoluble in non-polar group, it has good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide range of temperatures (-50 ~ 150) can be prepared from different raw materials, including elastomers, thermoplastic resins and thermosetting resins. Under high temperature, it is neither resistant to hydrolysis nor resistant to alkaline medium.
Commonly used monomers such as toluene diisocyanate, two benzene diisocyanate, etc.. Polyols are classified into 3 types: simple Polyols (ethylene glycol, glycerol, etc.), polyester oligomers containing terminal hydroxyl groups, polyesters for polyurethane, and polyether oligomers containing terminal hydroxyl groups, to prepare polyether polyurethanes.
Polymerization methods vary with material properties. Synthetic elastomer before preparation of low molecular weight diols, with excessive aromatic or aliphatic isocyanate reaction, generating isocyanate (-NCO) terminated prepolymer and polyol, chain extender, thermoplastic elastomer obtained by two yuan; if the diamine chain extender and further crosslinked to casting elastic body. The prepolymer was expanded by hydrazine or two amine chain to obtain elastic fiber; the prepolymer with more isocyanate was mixed with catalyst and foaming agent, and then the rigid foam was obtained directly. If the monomer, polyether, water, catalyst and other mixed, one step reaction can be obtained soft foam. The coating can be obtained by reacting monomers with polyols in solution; the adhesive is mixed and reacted with polyisocyanate monomers and low molecular weight polyesters or polyethers.
With the increasing demand for halogen-free flame retardants, environmental friendly polyurethane flame retardants have become one of the hot topics of concern. Environmental friendly polyurethane flame retardant belongs to N2P series flame retardant.
The production process, equipment and cost of environmental friendly polyurethane flame retardant are described in this paper. The environmentally friendly polyurethane flame retardant has the advantages of simple preparation, low energy consumption, low investment in production equipment, low cost and friendly environment. It is in line with the development trend of the world flame retardant.
In recent years, with the increasingly stringent fire safety standards at home and abroad, as well as the gradual improvement of people's awareness of fire protection, the market demand for environmentally friendly polyurethane flame retardant has increased year by year.
Under the circumstance of environmental protection, safety and so on, the requirement of halogen-free flame retardants is increasing. As a halogen-free flame retardant, N2P series flame retardants have no shortcomings of halogen flame retardants, which has aroused widespread concern. Environmentally friendly polyurethane flame retardant has the advantages of environmental protection, non-toxic, flame retardant, smoke suppression, a double effect, low cost and so on.
The synthetic method of the laboratory is: adding phosphoric acid (industrial grade 85%) into three flasks, stirring and heating, adding urea into the flask, opening the condenser tube, and then heating and stirring,
The material is uniformly distributed evenly; adding catalyst, can be observed that the mixture begins to react violently, foaming is serious; continue to heat, this time may be appropriate to speed up the stirring speed; stop heating, stirrer continue to work for a few minutes; the reaction was poured, cooled and solidified, and then crushing can.
Tris(2-chloroethyl)phosphate(TCEP)
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(TCEP)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%.
The dual function of catalyst in catalyzing and controlling the reaction degree in the reaction. Due to the action of the catalyst, the reaction conditions of phosphoric acid and urea are relatively mild, and the highest reaction temperature is about 138 degrees. The polymerization process needs only about 40min, and no special airtight production equipment is needed.
Industrial production of BL2 environmentally friendly polyurethane flame retardant requires the improvement of the existing stainless steel urea rubber reactor.
(1) increase in forced water circulation condensation system of fast and effective catalyst material after reaction, foaming is serious, although normally not overflow, but a condensation system can rapidly cooling the reaction material in special circumstances, so as to avoid spraying phenomenon.
(2) expand the exhaust pipe, increase the absorption of ammonia urea system under high temperature will decompose rapidly, emit large amounts of gas, if the exhaust pipe is not big enough, a large amount of gas can not be discharged will make the pressure in the reaction kettle is increased, prone to overflow phenomenon, therefore need to expand the exhaust gas pipeline. In addition, because there is a lot of ammonia in the exhaust gas, in order to avoid polluting the environment, ammonia absorption system can be set up.
(3) increase the temperature monitoring system, so that the temperature in the reaction kettle can be easily and quickly understood, so as to reach the corresponding temperature, adding urea and catalyst into the reaction kettle, and also can effectively control the reaction degree through the temperature monitoring system.
Heating systems and agitators also need to be partially improved. The cost of reforming stainless steel urea rubber reactor is very little. If liquid flame retardants are to be produced, additional water pipes leading to the reactor should be added. In addition, the display system of the pressure inside the reactor and the pH value of the reactant can be further added, which can better control the quality of the flame retardant produced, and correspondingly increase the cost of some equipment improvement.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polyurethane material is the best thermal insulation material at present in the world. A class of polymers containing NHCOO - repeating structural units in the main chain. English abbreviation PU. Polymerization of isocyanate (monomer) with hydroxyl compounds. Because of the strong polarity of urethane group, insoluble in non-polar group, it has good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide range of temperatures (-50 ~ 150) can be prepared from different raw materials, including elastomers, thermoplastic resins and thermosetting resins. Under high temperature, it is neither resistant to hydrolysis nor resistant to alkaline medium.
Commonly used monomers such as toluene diisocyanate, two benzene diisocyanate, etc.. Polyols are classified into 3 types: simple Polyols (ethylene glycol, glycerol, etc.), polyester oligomers containing terminal hydroxyl groups, polyesters for polyurethane, and polyether oligomers containing terminal hydroxyl groups, to prepare polyether polyurethanes.
Polymerization methods vary with material properties. Synthetic elastomer before preparation of low molecular weight diols, with excessive aromatic or aliphatic isocyanate reaction, generating isocyanate (-NCO) terminated prepolymer and polyol, chain extender, thermoplastic elastomer obtained by two yuan; if the diamine chain extender and further crosslinked to casting elastic body. The prepolymer was expanded by hydrazine or two amine chain to obtain elastic fiber; the prepolymer with more isocyanate was mixed with catalyst and foaming agent, and then the rigid foam was obtained directly. If the monomer, polyether, water, catalyst and other mixed, one step reaction can be obtained soft foam. The coating can be obtained by reacting monomers with polyols in solution; the adhesive is mixed and reacted with polyisocyanate monomers and low molecular weight polyesters or polyethers.
With the increasing demand for halogen-free flame retardants, environmental friendly polyurethane flame retardants have become one of the hot topics of concern. Environmental friendly polyurethane flame retardant belongs to N2P series flame retardant.
The production process, equipment and cost of environmental friendly polyurethane flame retardant are described in this paper. The environmentally friendly polyurethane flame retardant has the advantages of simple preparation, low energy consumption, low investment in production equipment, low cost and friendly environment. It is in line with the development trend of the world flame retardant.
In recent years, with the increasingly stringent fire safety standards at home and abroad, as well as the gradual improvement of people's awareness of fire protection, the market demand for environmentally friendly polyurethane flame retardant has increased year by year.
Under the circumstance of environmental protection, safety and so on, the requirement of halogen-free flame retardants is increasing. As a halogen-free flame retardant, N2P series flame retardants have no shortcomings of halogen flame retardants, which has aroused widespread concern. Environmentally friendly polyurethane flame retardant has the advantages of environmental protection, non-toxic, flame retardant, smoke suppression, a double effect, low cost and so on.
The synthetic method of the laboratory is: adding phosphoric acid (industrial grade 85%) into three flasks, stirring and heating, adding urea into the flask, opening the condenser tube, and then heating and stirring,
The material is uniformly distributed evenly; adding catalyst, can be observed that the mixture begins to react violently, foaming is serious; continue to heat, this time may be appropriate to speed up the stirring speed; stop heating, stirrer continue to work for a few minutes; the reaction was poured, cooled and solidified, and then crushing can.
Tris(2-chloroethyl)phosphate(TCEP)
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(TCEP)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%.
The dual function of catalyst in catalyzing and controlling the reaction degree in the reaction. Due to the action of the catalyst, the reaction conditions of phosphoric acid and urea are relatively mild, and the highest reaction temperature is about 138 degrees. The polymerization process needs only about 40min, and no special airtight production equipment is needed.
Industrial production of BL2 environmentally friendly polyurethane flame retardant requires the improvement of the existing stainless steel urea rubber reactor.
(1) increase in forced water circulation condensation system of fast and effective catalyst material after reaction, foaming is serious, although normally not overflow, but a condensation system can rapidly cooling the reaction material in special circumstances, so as to avoid spraying phenomenon.
(2) expand the exhaust pipe, increase the absorption of ammonia urea system under high temperature will decompose rapidly, emit large amounts of gas, if the exhaust pipe is not big enough, a large amount of gas can not be discharged will make the pressure in the reaction kettle is increased, prone to overflow phenomenon, therefore need to expand the exhaust gas pipeline. In addition, because there is a lot of ammonia in the exhaust gas, in order to avoid polluting the environment, ammonia absorption system can be set up.
(3) increase the temperature monitoring system, so that the temperature in the reaction kettle can be easily and quickly understood, so as to reach the corresponding temperature, adding urea and catalyst into the reaction kettle, and also can effectively control the reaction degree through the temperature monitoring system.
Heating systems and agitators also need to be partially improved. The cost of reforming stainless steel urea rubber reactor is very little. If liquid flame retardants are to be produced, additional water pipes leading to the reactor should be added. In addition, the display system of the pressure inside the reactor and the pH value of the reactant can be further added, which can better control the quality of the flame retardant produced, and correspondingly increase the cost of some equipment improvement.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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