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Synergistic flame retardant of PVC
2017-11-11 12:15:37
Synergistic flame retardant of PVC
Synergistic flame retardant of ZnCO3/MgCO3 polyvinyl chloride. B.I.D.Davis proposed a formula, namely plasticizer plasticized polyvinyl chloride with three aryl phosphate flame retardant, adding inorganic filler (mixture of ZnCO3, MgCO3), and to obtain high oxygen index. When the three aryl phosphate flame retardant plasticizer and Zn2CO3/MgCO3 mixture of common use, defects of PVC mixed synergistic flame retardant can make up for the ordinary flame retardant in thermal stability, the plasticization of polyvinyl chloride has good flame retardancy and smoke suppression.
Using three aryl phosphate as a substitute for some traditional plasticizers (two formic acid, two, DIDP), the amount of ZnCO3/MgCO3 mixture in the system was 10. When the light MgCO3/ZnCO3 was used, the oxygen index reached 33.4; while the heavy Mg2CO3/ZnCO3, the oxygen index was relatively low, which was 31.3. However, the two values are greater than the addition of another commercial flame retardant Ongard2 sample. In terms of smoke, smoke quantity of ZnCO3/MgCO3 mixture in the combustion of PVC is significantly less than the same amount of added Zn2CO3 or MgCO3 pvc.
In recent years, China's chemical industry experts by the experimental study, a method to enhance the flame retardant properties of PVC, which is calcium aluminate added in polyvinyl chloride before, this method is simple and easy, very obvious to enhance the flame retardant performance effect of pvc.
Calcium aluminate is a common inorganic salt, its molecular formula is 3CaO? Al2O3? 6H2O, due to the presence of large water molecules in the crystal, so once the heat reaches a certain temperature, the crystallization of water will be released. A temperature of 253 to 318 DEG C, the crystal water can release 61.3%; while the temperature rises to 341 to 472 DEG C, and the release of 23.2%; temperature is as high as 538 to 995 degrees, will release all of the remaining 15.5%. So when the incorporation of calcium aluminate PVC heat of combustion, the combustion heat absorbed by the water of crystallization will soon be released, thereby reducing the ignition temperature, combustion time delay of pvc.
In addition, in the line of fire, due to the addition of calcium aluminate in PVC, will make the HCl and release of 3CaO? Al2O3? 6H2O in Ca reaction, generating calcium chloride (CaCl2), so as to reduce toxic emissions of HCl. At the same time, the way of thermal decomposition of PVC can be changed, and the product of PVC pyrolysis can be changed into residual carbon, thus reducing the formation of combustible gas.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
There are two kinds of silicate for flame-retardant soft PVC: one is spray dried silicate (IPS), and the other is expanded silicate (IPG) [1]. When the PVC /IPS (50/50) system (plasticizer content 27%) was used, the maximum heat release rate (PRHR) and total heat release (THR) of the system were significantly decreased.
At the same time, it also compares IPG and P30 phosphate (degree of polymerization of 1500 ~ 3000 ammonium polyphosphate) and zinc borate (ZB) of PVC (plasticizer content 19%) flame retardant effect, whether it is PRHR or THR, IPG are much better than that of P30 and ZB, /IPG (50/50) THR PVC about /P30 PVC (50/50) or polyvinyl chloride /ZB (50/50) 1/10, PRHR is about 1/3. In order to obtain better flame retardancy of flame retardant PVC, the dosage of IPS needs to be about 50%.
Sb2O5 with flame retardancy also will not affect the transparency of the material, but not and frequently used metal soap stabilizers in common use, so how to avoid weaknesses, become a problem in the use of Sb2O5. Sb2O3 gel coated Sb2O5 can effectively solve this problem. When Sb2O3 colloid coated Sb2O5, the latter did not react with metal soap stabilizers, and the thermal stability of the material was not affected. Sb2O3 and Sb2O5 can simultaneously cooperate with chlorine in PVC to improve the flame retardancy of pvc.
In recent years, compound flame retardants have become one of the trends of modern flame retardants. Zhao Duanrong et al. Reported the research results of Sb2O3-ZnSn (OH) 6-ZnNH4PO4 flame retardant system. In PVC were added to Sb2O3-ZnSn (OH) 6, ZnSn (OH) 6-ZnNH4PO, Sb2O3-ZnNH4PO4 two system synergistic flame retardant, and Sb2O3-ZnSn (OH) 6-ZnNH4PO4 three element system of synergistic flame retardant, was as follows: two yuan in the system, Sb2O3 and ZnSn (OH) 6, ZnNH4PO4 compound showed positive synergetic effect ZnSn, (OH) 6 and ZnNH4PO4 compound showed negative synergetic effect. The three element system, Sb2O3, ZnSn (OH) 6, ZnNH4PO4 has great influence on PVC oxygen index, when the amount of adding flame retardant PVC in the constant, reducing the oxygen index increased when the content of ZnNH4PO4, Sb2O3 and ZnSn (OH) increased by 6 when the content of the oxygen index increased.
ATH/MDH PVC mixed synergistic flame retardant, which are mutually synergistic, complement each other, to reduce the dosage of fire retardant, improve the flame retardant properties of materials, processing performance and mechanical performance of the. Synergistic flame retardant PVC mixed with both and can make up for the ATH because of low temperature decomposition and defects decrease the flame retardant performance, and can make the composite flame retardant material decomposition in the oxidation process has good flame retardant effect. It is reported that MDH with low dosage (<30%) can promote the flame retardancy of ATH, especially the carbonization effect of the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Synergistic flame retardant of ZnCO3/MgCO3 polyvinyl chloride. B.I.D.Davis proposed a formula, namely plasticizer plasticized polyvinyl chloride with three aryl phosphate flame retardant, adding inorganic filler (mixture of ZnCO3, MgCO3), and to obtain high oxygen index. When the three aryl phosphate flame retardant plasticizer and Zn2CO3/MgCO3 mixture of common use, defects of PVC mixed synergistic flame retardant can make up for the ordinary flame retardant in thermal stability, the plasticization of polyvinyl chloride has good flame retardancy and smoke suppression.
Using three aryl phosphate as a substitute for some traditional plasticizers (two formic acid, two, DIDP), the amount of ZnCO3/MgCO3 mixture in the system was 10. When the light MgCO3/ZnCO3 was used, the oxygen index reached 33.4; while the heavy Mg2CO3/ZnCO3, the oxygen index was relatively low, which was 31.3. However, the two values are greater than the addition of another commercial flame retardant Ongard2 sample. In terms of smoke, smoke quantity of ZnCO3/MgCO3 mixture in the combustion of PVC is significantly less than the same amount of added Zn2CO3 or MgCO3 pvc.
In recent years, China's chemical industry experts by the experimental study, a method to enhance the flame retardant properties of PVC, which is calcium aluminate added in polyvinyl chloride before, this method is simple and easy, very obvious to enhance the flame retardant performance effect of pvc.
Calcium aluminate is a common inorganic salt, its molecular formula is 3CaO? Al2O3? 6H2O, due to the presence of large water molecules in the crystal, so once the heat reaches a certain temperature, the crystallization of water will be released. A temperature of 253 to 318 DEG C, the crystal water can release 61.3%; while the temperature rises to 341 to 472 DEG C, and the release of 23.2%; temperature is as high as 538 to 995 degrees, will release all of the remaining 15.5%. So when the incorporation of calcium aluminate PVC heat of combustion, the combustion heat absorbed by the water of crystallization will soon be released, thereby reducing the ignition temperature, combustion time delay of pvc.
In addition, in the line of fire, due to the addition of calcium aluminate in PVC, will make the HCl and release of 3CaO? Al2O3? 6H2O in Ca reaction, generating calcium chloride (CaCl2), so as to reduce toxic emissions of HCl. At the same time, the way of thermal decomposition of PVC can be changed, and the product of PVC pyrolysis can be changed into residual carbon, thus reducing the formation of combustible gas.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
There are two kinds of silicate for flame-retardant soft PVC: one is spray dried silicate (IPS), and the other is expanded silicate (IPG) [1]. When the PVC /IPS (50/50) system (plasticizer content 27%) was used, the maximum heat release rate (PRHR) and total heat release (THR) of the system were significantly decreased.
At the same time, it also compares IPG and P30 phosphate (degree of polymerization of 1500 ~ 3000 ammonium polyphosphate) and zinc borate (ZB) of PVC (plasticizer content 19%) flame retardant effect, whether it is PRHR or THR, IPG are much better than that of P30 and ZB, /IPG (50/50) THR PVC about /P30 PVC (50/50) or polyvinyl chloride /ZB (50/50) 1/10, PRHR is about 1/3. In order to obtain better flame retardancy of flame retardant PVC, the dosage of IPS needs to be about 50%.
Sb2O5 with flame retardancy also will not affect the transparency of the material, but not and frequently used metal soap stabilizers in common use, so how to avoid weaknesses, become a problem in the use of Sb2O5. Sb2O3 gel coated Sb2O5 can effectively solve this problem. When Sb2O3 colloid coated Sb2O5, the latter did not react with metal soap stabilizers, and the thermal stability of the material was not affected. Sb2O3 and Sb2O5 can simultaneously cooperate with chlorine in PVC to improve the flame retardancy of pvc.
In recent years, compound flame retardants have become one of the trends of modern flame retardants. Zhao Duanrong et al. Reported the research results of Sb2O3-ZnSn (OH) 6-ZnNH4PO4 flame retardant system. In PVC were added to Sb2O3-ZnSn (OH) 6, ZnSn (OH) 6-ZnNH4PO, Sb2O3-ZnNH4PO4 two system synergistic flame retardant, and Sb2O3-ZnSn (OH) 6-ZnNH4PO4 three element system of synergistic flame retardant, was as follows: two yuan in the system, Sb2O3 and ZnSn (OH) 6, ZnNH4PO4 compound showed positive synergetic effect ZnSn, (OH) 6 and ZnNH4PO4 compound showed negative synergetic effect. The three element system, Sb2O3, ZnSn (OH) 6, ZnNH4PO4 has great influence on PVC oxygen index, when the amount of adding flame retardant PVC in the constant, reducing the oxygen index increased when the content of ZnNH4PO4, Sb2O3 and ZnSn (OH) increased by 6 when the content of the oxygen index increased.
ATH/MDH PVC mixed synergistic flame retardant, which are mutually synergistic, complement each other, to reduce the dosage of fire retardant, improve the flame retardant properties of materials, processing performance and mechanical performance of the. Synergistic flame retardant PVC mixed with both and can make up for the ATH because of low temperature decomposition and defects decrease the flame retardant performance, and can make the composite flame retardant material decomposition in the oxidation process has good flame retardant effect. It is reported that MDH with low dosage (<30%) can promote the flame retardancy of ATH, especially the carbonization effect of the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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