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Phosphate flame retardant for polystyrene
2017-11-16 15:31:59
Phosphate flame retardant for polystyrene
The molecular weight of polystyrene phosphate flame retardant is larger than that of oligomer type phosphate flame retardant, which can be divided into two types: main chain phosphorus type and side chain phosphorus type. Polystyrene phosphate flame retardants are widely used in the flame retardancy of polystyrene plastics.
The synthesis methods of phosphate flame retardants for polystyrene are solution polymerization, interfacial polymerization and bulk polymerization. Wang Yuzhong two phenyl ester of phenyl sulfone was synthesized.
As zinc, magnesium, aluminum and other hydroxides or salts have better flame retardancy and smoke suppression effect, organic phosphates such as zinc, magnesium and aluminum have been paid more and more attention. Phosphate has the properties of flame retardancy, low toxicity, weather resistance, lubrication and plasticization.
Due to the high efficiency of organic phosphorus flame retardant, corrosive, toxic pyrolysis decomposition product and flame retardant polymer and combustion products rarely, many varieties also have plastic, thermal stability and so on, have a very important role in improving the overall performance of polymer materials. Therefore, organophosphorus flame retardants will become one of the hot spots in the field of flame retardant science. The future research of organophosphorus flame retardants will focus on the following aspects.
(1) high molecular weight organophosphorus flame retardant. This kind of flame retardant has the advantages of high melting point, solid at room temperature and good thermal stability. It is easy to use and can be directly added.
(2) organic phosphorus oligomer and polymer flame retardant. This kind of flame retardant has the characteristics of large molecular weight, low vapor pressure and many functions, and has been widely used.
(3) reactive organophosphorus flame retardant. The study of reactive flame retardants has been a hot spot in the field of flame retardants. As a part of the material, the flame retardant does not migrate, so it is of great significance to improve the comprehensive properties of the material.
(4) intumescent organic phosphorus flame retardant. Intumescent flame retardant is a kind of flame retardant with phosphorus and nitrogen as flame retardant elements, and generally does not contain halogen. Therefore, there is no need to use antimony synergistic agent. The polymers containing this kind of flame retardant can form a uniform porous carbon foam layer when heated or heated. The foam layer has the advantages of heat insulation, oxygen isolation and smoke suppression, and can prevent the droplets from producing. Therefore, the foam has good flame retardant and smoke suppression function.
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.
Intumescent flame retardant consists of three parts: acid source (dehydrating agent), carbon source (carbon forming agent) and gas source (foaming agent). Due to the increasingly stringent requirements of smoke suppression and attenuation, many traditional flame retardants are faced with difficulties, and the characteristics of intumescent flame retardants provide a good opportunity for their own development. Intumescent flame retardants used in polymers have become one of the most active research fields of flame retardants in the last century. They are also considered as one of the most promising ways to realize halogen-free flame retardants.
As everyone knows, the use of organic phosphate (such as DMMP), P2O5 and epoxy can hydroxyl oligomer synthesis organic phosphate. In addition, in order to endow the product with hydrophilic properties, another hydroxyl containing reactant (such as water, alcohol, ethylene glycol and pentaerythritol) can be added at the end of the reaction. At the same time, such hydroxyl - containing reactants also regulate the molecular weight of oligomers.
The use of ethylene glycol and glycerol instead of epoxy compound as the main polymerization reaction after two reaction steps of a formaldehyde free flame retardant FRC-F, the hydroxyl content of product based on phosphorus content did not change greatly increased, increasing the probability theory and polybasic acid crosslinking agent and cellulose reaction, so as to apply it to flame retardant finishing of cotton fiber provides favorable conditions. Flame retardant FRC-F molecules containing alkoxyl and hydroxyl groups, under acidic conditions and four carboxyl ester carboxylic acid butane, and also cellulose molecules on hydroxyl carboxyl and ether, or cellulose macromolecule polycarboxylate on hydroxyl ester to form cross-linked in the fabric, the flame retardant effect has the washing resistance.
Phosphate ester, also known as phosphate ester (as distinguished from Phosphite), is an ester derivative of phosphoric acid, which belongs to a class of phosphoric acid derivatives. Phosphoric acid is three yuan acid, so the phosphate ester can be divided into primary phosphate ester (phosphoric ester, alkyl phosphoric acid), secondary phosphate ester (phosphoric acid two ester) and tertiary phosphate ester (phosphoric acid three ester) according to the different base number of substituted hydrocarbon.
The ester and two ester of phosphoric acid are strong acids, such as methyl phosphate and phosphoric acid two methyl ester pKa are 1.54 and 1.29 respectively. Alkyl phosphates, alkyl pyrophosphate and alkyl three phosphoric acid exist in the form of salt. DNA and RNA can be regarded as polymers of [PO2 (OR) (OR')]n type.
The addition of synergistic agent can obviously improve the flame retardant efficiency of intumescent flame retardant, and reduce the adverse effect of flame retardant on the matrix performance. At the same time, the successful development of various synergistic agents provides strong guidance for the study of surface modification and microencapsulation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The molecular weight of polystyrene phosphate flame retardant is larger than that of oligomer type phosphate flame retardant, which can be divided into two types: main chain phosphorus type and side chain phosphorus type. Polystyrene phosphate flame retardants are widely used in the flame retardancy of polystyrene plastics.
The synthesis methods of phosphate flame retardants for polystyrene are solution polymerization, interfacial polymerization and bulk polymerization. Wang Yuzhong two phenyl ester of phenyl sulfone was synthesized.
As zinc, magnesium, aluminum and other hydroxides or salts have better flame retardancy and smoke suppression effect, organic phosphates such as zinc, magnesium and aluminum have been paid more and more attention. Phosphate has the properties of flame retardancy, low toxicity, weather resistance, lubrication and plasticization.
Due to the high efficiency of organic phosphorus flame retardant, corrosive, toxic pyrolysis decomposition product and flame retardant polymer and combustion products rarely, many varieties also have plastic, thermal stability and so on, have a very important role in improving the overall performance of polymer materials. Therefore, organophosphorus flame retardants will become one of the hot spots in the field of flame retardant science. The future research of organophosphorus flame retardants will focus on the following aspects.
(1) high molecular weight organophosphorus flame retardant. This kind of flame retardant has the advantages of high melting point, solid at room temperature and good thermal stability. It is easy to use and can be directly added.
(2) organic phosphorus oligomer and polymer flame retardant. This kind of flame retardant has the characteristics of large molecular weight, low vapor pressure and many functions, and has been widely used.
(3) reactive organophosphorus flame retardant. The study of reactive flame retardants has been a hot spot in the field of flame retardants. As a part of the material, the flame retardant does not migrate, so it is of great significance to improve the comprehensive properties of the material.
(4) intumescent organic phosphorus flame retardant. Intumescent flame retardant is a kind of flame retardant with phosphorus and nitrogen as flame retardant elements, and generally does not contain halogen. Therefore, there is no need to use antimony synergistic agent. The polymers containing this kind of flame retardant can form a uniform porous carbon foam layer when heated or heated. The foam layer has the advantages of heat insulation, oxygen isolation and smoke suppression, and can prevent the droplets from producing. Therefore, the foam has good flame retardant and smoke suppression function.
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.
Intumescent flame retardant consists of three parts: acid source (dehydrating agent), carbon source (carbon forming agent) and gas source (foaming agent). Due to the increasingly stringent requirements of smoke suppression and attenuation, many traditional flame retardants are faced with difficulties, and the characteristics of intumescent flame retardants provide a good opportunity for their own development. Intumescent flame retardants used in polymers have become one of the most active research fields of flame retardants in the last century. They are also considered as one of the most promising ways to realize halogen-free flame retardants.
As everyone knows, the use of organic phosphate (such as DMMP), P2O5 and epoxy can hydroxyl oligomer synthesis organic phosphate. In addition, in order to endow the product with hydrophilic properties, another hydroxyl containing reactant (such as water, alcohol, ethylene glycol and pentaerythritol) can be added at the end of the reaction. At the same time, such hydroxyl - containing reactants also regulate the molecular weight of oligomers.
The use of ethylene glycol and glycerol instead of epoxy compound as the main polymerization reaction after two reaction steps of a formaldehyde free flame retardant FRC-F, the hydroxyl content of product based on phosphorus content did not change greatly increased, increasing the probability theory and polybasic acid crosslinking agent and cellulose reaction, so as to apply it to flame retardant finishing of cotton fiber provides favorable conditions. Flame retardant FRC-F molecules containing alkoxyl and hydroxyl groups, under acidic conditions and four carboxyl ester carboxylic acid butane, and also cellulose molecules on hydroxyl carboxyl and ether, or cellulose macromolecule polycarboxylate on hydroxyl ester to form cross-linked in the fabric, the flame retardant effect has the washing resistance.
Phosphate ester, also known as phosphate ester (as distinguished from Phosphite), is an ester derivative of phosphoric acid, which belongs to a class of phosphoric acid derivatives. Phosphoric acid is three yuan acid, so the phosphate ester can be divided into primary phosphate ester (phosphoric ester, alkyl phosphoric acid), secondary phosphate ester (phosphoric acid two ester) and tertiary phosphate ester (phosphoric acid three ester) according to the different base number of substituted hydrocarbon.
The ester and two ester of phosphoric acid are strong acids, such as methyl phosphate and phosphoric acid two methyl ester pKa are 1.54 and 1.29 respectively. Alkyl phosphates, alkyl pyrophosphate and alkyl three phosphoric acid exist in the form of salt. DNA and RNA can be regarded as polymers of [PO2 (OR) (OR')]n type.
The addition of synergistic agent can obviously improve the flame retardant efficiency of intumescent flame retardant, and reduce the adverse effect of flame retardant on the matrix performance. At the same time, the successful development of various synergistic agents provides strong guidance for the study of surface modification and microencapsulation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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