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Microcapsule red phosphorus flame retardant
2017-10-7 10:40:35
Microcapsule red phosphorus flame retardant
Red phosphorus is an excellent inorganic flame retardant, which has high flame retardant efficiency. Compared with other flame retardants, it needs less to be added to the same flame retardant level, so it has little influence on the physical mechanical properties of the material. But it is exposed to moisture in the air, phosphoric acid, phosphoric acid and the release of highly toxic hydrogen phosphine gas; Meanwhile, the compatibility of red phosphorus and most polymers is poor, affecting the flame retardant and mechanical properties of the products.
If ordinary red phosphorus microencapsulation can be used to overcome the above shortcomings, the red phosphorus flame retardants of microcapsules are highly valued by researchers from all over the world. Melamine - formaldehyde resin is a kind of fine resin with fine crosslinking and excellent thermal stability. It has high mechanical strength, good heat resistance and water resistance. The melamine - formaldehyde resin was used to cover the red phosphorus and the p-n coeffect was expected to be played in the flame retardant materials.
The expansion type flame retardant (IFR) is one of the hot spots in recent years, combining the advantages of the microcapsule red phosphorus flame retardant (MRP) and IFR, and the MRP as a component of IFR is rarely reported. This paper studied the preparation of MRP with melamine - formaldehyde resin as capsule.
Preparation of red phosphorous flame retardants of microcapsules: to add a certain amount of formaldehyde, melamine and distilled water to the three flask, after stirring for 10min, the pH value was adjusted to 8.0. Heat to 55 ~ 60 ℃, transparent to the reaction liquid, a quick melamine - formaldehyde prepolymer.
Red phosphorus coated: add the ground red phosphorus to the three flask, and add the right amount of distilled water, stir 10min, add dispersants and a certain amount of prepolymer. Heating up to 50 ℃ or so, regulate the pH value to 5.0, continue to heat up to 60 ℃, insulation stir 2 h, stop stirring, adjust pH value to 7.0, wash products and filtered, dry 2 h under 103 ℃.
IFR preparation: a certain amount of pentaerythritol, melamine, and red phosphorus covered in the coating were ground and mixed in agate mortar.
Triisobutyl Phosphate (TIBP)
The following detailed description below about Triisobutyl Phosphate raw materials:
Raw materials of this product with three phosphorus oxychloride and isobutyl alcohol as main raw materials, respectively by esterification, dealcoholization drive acid, neutralization and water washing, distillation method to get the Triisobutyl Phosphate products.
The above is the raw material of this product specifications, such as Triisobutyl Phosphate raw materials to further understand please contact us.
Triisobutyl Phosphate(TIBP) is mainly used for antifoamer and penetrant. It is also be widely used in printing and dying, ink, construction, and oil field additives, etc. Another chemical name of Triisobutyl Phosphate (TIBP) is tri -butyl phosphate.
The performance test of red phosphorus flame retardants of microcapsules and the characterization of the moisture absorption rate: a proper amount of supersaturated potassium nitrate solution was put in the bottom of the closed and good drying equipment, and the relative humidity was 95 %. The sample 3g was put into the dryer and weighed every other 2d, and the water absorption was calculated after 10d. Oxidation resistance: accurate according to samples from 10 g red phosphorus, a moderate amount of distilled water in three flask, 1 h heated to boiling, filtering, take 100 ml the filtrate, pure sodium chloride, add 10 g analysis with standard naoh solution titration after dissolved in the filtrate of oxygen acid formed by the oxidation, with red phosphorus consumption of sodium hydroxide mg per gram number to represent its oxidation resistance.
The morphology of the particles was analyzed by Japanese electronic jsm-63802v scanning electron microscope. Ignition and flame retardant properties: the Pyris - 6 TGA thermo-gravimetric analyzer thermo-gravimetric analysis was carried out on the coating before and after the red phosphorus, sample quality (10.0 + 0.5 mg), temperature range of 50 ~ 800 ℃, 15 ℃ / min, the heating rate of nitrogen atmosphere, the velocity of 20 ml/min.
Into carbon: microscopic capsule red phosphorus, pentaerythritol, melamine in different Moore made IFR match, will be different form of IFR insulation under 500 ℃ for 10 min. At 500 ℃ under the different composition of IFR residual heavy said its carbon performance. The oxygen index (OI) was determined by GB/T 2406-1993 on the jf-3 oxygen index tester.
The performance of red phosphorus flame retardants of microcapsules. Due to the chemical reaction of red phosphorus adsorption, red phosphorus can inhibit the occurrence of this reaction to varying degrees, reduce the moisture absorption rate of red phosphorus and the production of hydrogen phosphate, and improve the safety of red phosphorus. So hygroscopicity can be used as one of the indexes to determine the quality of red phosphorus.
After coating, the moisture absorption rate of red phosphorus was decreased to 2.08%, and the moisture absorption performance was significantly improved. Each gram of uncoated red phosphorus consumed 11.2mg of sodium hydroxide, while red phosphorus per gram consumed 1.12mg of sodium hydroxide, and the antioxidant performance was greatly enhanced.
Not coated red phosphorus (RP) a weightless stage only 450 ~ 545 ℃; Coated red phosphorus (MRP) is 385 ~ 422 ℃ (the first stage of weightlessness), 470 ~ 553 ℃ (the second stage of weightlessness) two phase of weightlessness.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Red phosphorus is an excellent inorganic flame retardant, which has high flame retardant efficiency. Compared with other flame retardants, it needs less to be added to the same flame retardant level, so it has little influence on the physical mechanical properties of the material. But it is exposed to moisture in the air, phosphoric acid, phosphoric acid and the release of highly toxic hydrogen phosphine gas; Meanwhile, the compatibility of red phosphorus and most polymers is poor, affecting the flame retardant and mechanical properties of the products.
If ordinary red phosphorus microencapsulation can be used to overcome the above shortcomings, the red phosphorus flame retardants of microcapsules are highly valued by researchers from all over the world. Melamine - formaldehyde resin is a kind of fine resin with fine crosslinking and excellent thermal stability. It has high mechanical strength, good heat resistance and water resistance. The melamine - formaldehyde resin was used to cover the red phosphorus and the p-n coeffect was expected to be played in the flame retardant materials.
The expansion type flame retardant (IFR) is one of the hot spots in recent years, combining the advantages of the microcapsule red phosphorus flame retardant (MRP) and IFR, and the MRP as a component of IFR is rarely reported. This paper studied the preparation of MRP with melamine - formaldehyde resin as capsule.
Preparation of red phosphorous flame retardants of microcapsules: to add a certain amount of formaldehyde, melamine and distilled water to the three flask, after stirring for 10min, the pH value was adjusted to 8.0. Heat to 55 ~ 60 ℃, transparent to the reaction liquid, a quick melamine - formaldehyde prepolymer.
Red phosphorus coated: add the ground red phosphorus to the three flask, and add the right amount of distilled water, stir 10min, add dispersants and a certain amount of prepolymer. Heating up to 50 ℃ or so, regulate the pH value to 5.0, continue to heat up to 60 ℃, insulation stir 2 h, stop stirring, adjust pH value to 7.0, wash products and filtered, dry 2 h under 103 ℃.
IFR preparation: a certain amount of pentaerythritol, melamine, and red phosphorus covered in the coating were ground and mixed in agate mortar.
Triisobutyl Phosphate (TIBP)
The following detailed description below about Triisobutyl Phosphate raw materials:
Raw materials of this product with three phosphorus oxychloride and isobutyl alcohol as main raw materials, respectively by esterification, dealcoholization drive acid, neutralization and water washing, distillation method to get the Triisobutyl Phosphate products.
The above is the raw material of this product specifications, such as Triisobutyl Phosphate raw materials to further understand please contact us.
Triisobutyl Phosphate(TIBP) is mainly used for antifoamer and penetrant. It is also be widely used in printing and dying, ink, construction, and oil field additives, etc. Another chemical name of Triisobutyl Phosphate (TIBP) is tri -butyl phosphate.
The performance test of red phosphorus flame retardants of microcapsules and the characterization of the moisture absorption rate: a proper amount of supersaturated potassium nitrate solution was put in the bottom of the closed and good drying equipment, and the relative humidity was 95 %. The sample 3g was put into the dryer and weighed every other 2d, and the water absorption was calculated after 10d. Oxidation resistance: accurate according to samples from 10 g red phosphorus, a moderate amount of distilled water in three flask, 1 h heated to boiling, filtering, take 100 ml the filtrate, pure sodium chloride, add 10 g analysis with standard naoh solution titration after dissolved in the filtrate of oxygen acid formed by the oxidation, with red phosphorus consumption of sodium hydroxide mg per gram number to represent its oxidation resistance.
The morphology of the particles was analyzed by Japanese electronic jsm-63802v scanning electron microscope. Ignition and flame retardant properties: the Pyris - 6 TGA thermo-gravimetric analyzer thermo-gravimetric analysis was carried out on the coating before and after the red phosphorus, sample quality (10.0 + 0.5 mg), temperature range of 50 ~ 800 ℃, 15 ℃ / min, the heating rate of nitrogen atmosphere, the velocity of 20 ml/min.
Into carbon: microscopic capsule red phosphorus, pentaerythritol, melamine in different Moore made IFR match, will be different form of IFR insulation under 500 ℃ for 10 min. At 500 ℃ under the different composition of IFR residual heavy said its carbon performance. The oxygen index (OI) was determined by GB/T 2406-1993 on the jf-3 oxygen index tester.
The performance of red phosphorus flame retardants of microcapsules. Due to the chemical reaction of red phosphorus adsorption, red phosphorus can inhibit the occurrence of this reaction to varying degrees, reduce the moisture absorption rate of red phosphorus and the production of hydrogen phosphate, and improve the safety of red phosphorus. So hygroscopicity can be used as one of the indexes to determine the quality of red phosphorus.
After coating, the moisture absorption rate of red phosphorus was decreased to 2.08%, and the moisture absorption performance was significantly improved. Each gram of uncoated red phosphorus consumed 11.2mg of sodium hydroxide, while red phosphorus per gram consumed 1.12mg of sodium hydroxide, and the antioxidant performance was greatly enhanced.
Not coated red phosphorus (RP) a weightless stage only 450 ~ 545 ℃; Coated red phosphorus (MRP) is 385 ~ 422 ℃ (the first stage of weightlessness), 470 ~ 553 ℃ (the second stage of weightlessness) two phase of weightlessness.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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