News Details
Polyolefin microcapsule flame retardant
2017-11-14 12:40:14
Polyolefin microcapsule flame retardant
Red phosphorus is an excellent inorganic flame retardant, flame retardant and high efficiency, compared with other flame retardant, flame retardant to reach the same level required to add less, thus affecting the physical and mechanical properties of the material is small. But it is exposed to the air easy to absorb moisture, oxidation of phosphate and release toxic phosphine gas; at the same time, poor compatibility with most of the red phosphorus polymer, flame retardant effect and mechanical properties of products.
If the ordinary red phosphorus microencapsulation, can overcome the above disadvantages fundamentally, so the polyolefin microcapsule flame retardant has drawn the attention of many researchers. Melamine formaldehyde resin is a kind of resin with fine crosslinking, strong hardness and excellent thermal stability. It has high mechanical strength, good heat resistance and water resistance. The melamine formaldehyde resin for coated red phosphorus, P - N can be expected to play a synergistic effect in flame retardant materials.
Intumescent flame retardant (IFR) is one of the hot spots in recent years. The advantages of polyolefin microcapsule flame retardant and IFR are very few. However, there are few reports about polyolefin microcapsule flame retardant as a component of IFR. In this paper, the preparation of MRP with melamine formaldehyde resin as the material was studied.
Preparation of polyolefin microcapsule flame retardant: adding a certain amount of formaldehyde, melamine and distilled water into three flasks, stirring 10min, adjusting the pH value to 8. Melamine formaldehyde prepolymer was obtained when the reaction solution was heated to 55~60.
Red phosphorus coated red phosphorus: grinding good joined the three flasks, and adding distilled water, stirring 10min, dispersant, a certain amount of prepolymer. Heating up to 50 degrees Celsius, adjust the pH value to 5, continue to rise to 60 degrees, heat 2h, stirring, adjust the pH value to 7, the product washed and filtered, dried at 103 h for 2 hours.
IFR preparation: weigh a certain amount of pentaerythritol, melamine and well coated red phosphorus, evenly mixed in agate mortar in grinding.
Performance test of polyolefin microcapsule flame retardant and characterization of moisture absorption rate: a suitable amount of supersaturated potassium nitrate solution was placed at the bottom of the closed dryer, with relative humidity of 95%. The sample 3G was put into the desiccator, weighed every 2D, and the water absorption was calculated after 10d. Antioxidation: weigh accurately 10g red phosphorus samples and the amount of distilled water to three flasks, heated to boiling 1H, filter, 100 ml of the filtrate, adding 10g of pure sodium chloride, dissolved oxygen acid formed by oxidation with standard sodium hydroxide solution titration filtrate, per gram of red phosphorus consumption of sodium hydroxide mg is expressed as the number of its antioxidant properties.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Morphology observation: red phosphorus coated particle morphology analysis before and after using JSM-63802V scanning electron microscope. Ignition and flame retardant properties: Pyris-6 TGA thermogravimetric analyzer before and after coating of red phosphorus were studied bythermogravimetric analysis using the sample quality, (10 + 0.5) Mg, the temperature range of 50~800 DEG C, the heating rate of 15 deg / min, nitrogen flow rate of 20 ml/min.
Char: MRP, pentaerythritol and melamine with different molar ratio of prepared IFR, the different composition of IFR at 500 DEG C insulation 10min. The char content of IFR with different compositions at 500 C indicates its char formation. Determination of oxygen index (OI): according to GB/T 2406 - 1993 on the JF-3 oxygen index tester.
Properties of polyolefin microcapsule flame retardant. Because the red phosphorus hygroscopic chemical reaction, encapsulated red phosphorus can inhibit the reaction, reduce the water absorption rate and the amount of red phosphorus phosphine, improve the safety of red phosphorus. One of the indicators so absorbent can be used to judge the quality of the coated red phosphorus.
To reduce the moisture absorption rate of the coating of coated red phosphorus never 13.1% to 2.08%, the moisture absorption performance was improved obviously; not per gram of encapsulated red phosphorus sodium hydroxide 11.2mg, and per gram of encapsulated red phosphorus only sodium hydroxide 1.12mg, antioxidant properties are greatly enhanced.
Not only coated red phosphorus (RP) 450~545 C a weight loss stage; (MRP) 385~422 coated red phosphorus (the first weight loss stage), C 470~553 C (second weight loss stages) two weight loss stages. MRP has a slight weight loss at 385 degrees Celsius (about 10% weight loss), this may be because the encapsulated red phosphorus layer on the surface of the heat caused by the slow decomposition; when the temperature reaches 470 degrees Celsius when there is a sharp peaks, indicating that the red phosphorus burning, which reached MRP.
The edges of uncoated clear red phosphorus particles and have no fixed shape, the coated red phosphorus particles with smooth surface was spherical, and the particle is soft agglomeration trend, this may be because the red phosphorus has smaller particle size and particle has certain adhesion. Because the red phosphorus particles are spherical and soft agglomerated, the practical application in the resin flow and dispersion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Red phosphorus is an excellent inorganic flame retardant, flame retardant and high efficiency, compared with other flame retardant, flame retardant to reach the same level required to add less, thus affecting the physical and mechanical properties of the material is small. But it is exposed to the air easy to absorb moisture, oxidation of phosphate and release toxic phosphine gas; at the same time, poor compatibility with most of the red phosphorus polymer, flame retardant effect and mechanical properties of products.
If the ordinary red phosphorus microencapsulation, can overcome the above disadvantages fundamentally, so the polyolefin microcapsule flame retardant has drawn the attention of many researchers. Melamine formaldehyde resin is a kind of resin with fine crosslinking, strong hardness and excellent thermal stability. It has high mechanical strength, good heat resistance and water resistance. The melamine formaldehyde resin for coated red phosphorus, P - N can be expected to play a synergistic effect in flame retardant materials.
Intumescent flame retardant (IFR) is one of the hot spots in recent years. The advantages of polyolefin microcapsule flame retardant and IFR are very few. However, there are few reports about polyolefin microcapsule flame retardant as a component of IFR. In this paper, the preparation of MRP with melamine formaldehyde resin as the material was studied.
Preparation of polyolefin microcapsule flame retardant: adding a certain amount of formaldehyde, melamine and distilled water into three flasks, stirring 10min, adjusting the pH value to 8. Melamine formaldehyde prepolymer was obtained when the reaction solution was heated to 55~60.
Red phosphorus coated red phosphorus: grinding good joined the three flasks, and adding distilled water, stirring 10min, dispersant, a certain amount of prepolymer. Heating up to 50 degrees Celsius, adjust the pH value to 5, continue to rise to 60 degrees, heat 2h, stirring, adjust the pH value to 7, the product washed and filtered, dried at 103 h for 2 hours.
IFR preparation: weigh a certain amount of pentaerythritol, melamine and well coated red phosphorus, evenly mixed in agate mortar in grinding.
Performance test of polyolefin microcapsule flame retardant and characterization of moisture absorption rate: a suitable amount of supersaturated potassium nitrate solution was placed at the bottom of the closed dryer, with relative humidity of 95%. The sample 3G was put into the desiccator, weighed every 2D, and the water absorption was calculated after 10d. Antioxidation: weigh accurately 10g red phosphorus samples and the amount of distilled water to three flasks, heated to boiling 1H, filter, 100 ml of the filtrate, adding 10g of pure sodium chloride, dissolved oxygen acid formed by oxidation with standard sodium hydroxide solution titration filtrate, per gram of red phosphorus consumption of sodium hydroxide mg is expressed as the number of its antioxidant properties.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
(A Small Cabinet Loaded With 16 Tons), 1000KG / IB Bucket (A Small Cabinet Installed 18 Tons) Or 23 Tons (1, 3-Dichloro-2-Propyl) Phosphate (TDCPP) Packing: Net Weight 200KG / ISOTANK.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Morphology observation: red phosphorus coated particle morphology analysis before and after using JSM-63802V scanning electron microscope. Ignition and flame retardant properties: Pyris-6 TGA thermogravimetric analyzer before and after coating of red phosphorus were studied bythermogravimetric analysis using the sample quality, (10 + 0.5) Mg, the temperature range of 50~800 DEG C, the heating rate of 15 deg / min, nitrogen flow rate of 20 ml/min.
Char: MRP, pentaerythritol and melamine with different molar ratio of prepared IFR, the different composition of IFR at 500 DEG C insulation 10min. The char content of IFR with different compositions at 500 C indicates its char formation. Determination of oxygen index (OI): according to GB/T 2406 - 1993 on the JF-3 oxygen index tester.
Properties of polyolefin microcapsule flame retardant. Because the red phosphorus hygroscopic chemical reaction, encapsulated red phosphorus can inhibit the reaction, reduce the water absorption rate and the amount of red phosphorus phosphine, improve the safety of red phosphorus. One of the indicators so absorbent can be used to judge the quality of the coated red phosphorus.
To reduce the moisture absorption rate of the coating of coated red phosphorus never 13.1% to 2.08%, the moisture absorption performance was improved obviously; not per gram of encapsulated red phosphorus sodium hydroxide 11.2mg, and per gram of encapsulated red phosphorus only sodium hydroxide 1.12mg, antioxidant properties are greatly enhanced.
Not only coated red phosphorus (RP) 450~545 C a weight loss stage; (MRP) 385~422 coated red phosphorus (the first weight loss stage), C 470~553 C (second weight loss stages) two weight loss stages. MRP has a slight weight loss at 385 degrees Celsius (about 10% weight loss), this may be because the encapsulated red phosphorus layer on the surface of the heat caused by the slow decomposition; when the temperature reaches 470 degrees Celsius when there is a sharp peaks, indicating that the red phosphorus burning, which reached MRP.
The edges of uncoated clear red phosphorus particles and have no fixed shape, the coated red phosphorus particles with smooth surface was spherical, and the particle is soft agglomeration trend, this may be because the red phosphorus has smaller particle size and particle has certain adhesion. Because the red phosphorus particles are spherical and soft agglomerated, the practical application in the resin flow and dispersion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian