News Details
Intumescent flame retardant for Polypropylene
2017-11-22 11:47:44
Intumescent flame retardant for Polypropylene
The flammability of thermoplastic materials leads to the development of flame retardant systems. Flame retardant can be divided into inorganic flame retardant and organic flame retardant. At the same time, inorganic flame retardant with flame retardant and smoke suppression function, does not produce toxic gases and corrosive gases when burned, but the amount is large, it is seriously affecting the physical and mechanical properties of flame retardant materials and processing properties, widely used at home and abroad of the ultrafine solid particles, surfactant treatment, microencapsulation and other methods to improve its performance.
Organic flame retardants include halogenated flame retardants and phosphorus based flame retardants. Halogen flame retardant has good flame retardant effect, but HX with flame retardant is toxic corrosive gas, will be gradually eliminated; phosphorus flame retardant is low toxicity, but the flame retardant efficiency is low. In order to improve its flame retardant effect, phosphorus nitrogen synergistic flame retardant is adopted.
Intumescent flame retardant for polypropylene is a kind of flame retardant with phosphorus and nitrogen as its main composition. It has no halogen or antimony oxide as synergistic agent. It is an environmentally friendly flame retardant with high flame retardance. Intumescent flame retardant for polypropylene has become one of the active research fields, and it is also considered as one of the promising ways to realize halogen-free flame retardants.
The flame retardant mechanism of intumescent flame retardant for polypropylene is constantly updated. Domestic scholars generally believe that intumescent flame retardant system is generally composed of three parts: acid source, carbon source and gas source.
General inorganic acid or acid source is heated to a certain temperature to form a compound inorganic acid, such as phosphoric acid, phosphorus oxychloride, ammonium polyphosphate; carbon source is also called charring agent, which is formed based foam char layer, mainly some of the high carbon content of the polyhydroxy compounds, such as itrate the alcohol and starch source; also called foam source, commonly used melamine foam source, dicyandiamide etc.. Some foreign scholars believe that intumescent flame retardant consists of four parts: binder, charring agent, carbonized catalyst (acid source) and foaming agent.
The flame retardant mechanism of intumescent flame retardant is: when heated, the acid source decomposes to produce dehydrating agent, which can form ester with ester, ester, then dehydrate and crosslink to form carbon. At the same time, foaming agent releases a large amount of gas to help expand the carbon layer. The carbon layer thickness increases with the polymer surface carbon layer on the surface of the temperature gradient, the polymer surface temperature is much lower than the flame temperature, reducing the possibility of further degradation of polymer release of flammable gas, and cut off from the outside into the oxygen, which can effect on flame retardant polymer in quite a long period of time.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
In order to study the mechanism of flame retardant intumescent flame retardant, overcome before carbon layer material properties only 430 DEG C expansion of flame retardant system, SergeBourbigot by micro - Raman spectroscopy, 13C, 1H, 31P, NMR of solid ammonium polyphosphate and pentaerythritol intumescent flame retardant system of more than 430 DEG C spectrum. When the temperature rises, the expansion structure has also changed, 280 degrees are mainly aromatic and aliphatic molecules by phosphate (salt) bridge link; with the increase of temperature, the concentration of aromatic molecules increases, aromatic molecular groups occupy the main position of 560 DEG C, so the structure rigidity increase, the stress and deformation in difficulties. The carbon layer of the formation of P4O10 crystals. The study of carbonization mechanism of high temperature expansion phenomenon provides theoretical guidance for the synthesis of new intumescent flame retardant and flame retardant modification.
Ma Zhiling and so on through the expansion effect of IFR and application in polypropylene flame retardant effect research found that rigid structure of flame retardant has better flame retardant effect, IFR material to improve the flame retardant effect is the key to overcome the phenomenon of burning drops, improve the expansion effect.
The new modified intumescent flame retardant system is developing continuously. The intumescent flame retardant has developed rapidly since 90s. Many scholars at home and abroad have done a lot of research work on it.
For example, Xu Jiayan and Hu Yuan think that intumescent flame retardant is an effective way to realize the green and environment-friendly development of flame retardant materials. The intumescent flame retardant system composed of PVA and phosphorus compounds has good flame retardancy, but it is easy to coagulate when phosphoric acid and phosphate are used together with PVA. The water solubility of the system is destroyed, and it is easy to absorb moisture, and the phenomenon of salt and alkali appears. The phosphate ester is insoluble in water and can not be used together with PVA, which limits the application of the system.
Ma Zhiling, Zhao Wenji a (2-chloroethane) phosphate chloride with chloroform as the medium, through the removal of HCl esterification was grafted on PVA, get the flame retardant PVA, can be used alone, can also be used as intumescent flame retardants and other polymer blends.
The intumescent flame retardant carbon layer is brittle and exposed to temperatures above 500 air slow oxidation affects the flame retardant effect, BaljinderK.Kandola etc. according to the combustion behavior of flame retardant fiber and fabric mixed proposed by physical and chemical compatibility mechanism to form a reinforced carbon carbon bond layer or intumescent carbon layer fiber structure crosslinking, this structure has strong antioxidant, thereby enhancing the flame retardant effect, greatly slowed the degree of oxidation of carbon layer.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The flammability of thermoplastic materials leads to the development of flame retardant systems. Flame retardant can be divided into inorganic flame retardant and organic flame retardant. At the same time, inorganic flame retardant with flame retardant and smoke suppression function, does not produce toxic gases and corrosive gases when burned, but the amount is large, it is seriously affecting the physical and mechanical properties of flame retardant materials and processing properties, widely used at home and abroad of the ultrafine solid particles, surfactant treatment, microencapsulation and other methods to improve its performance.
Organic flame retardants include halogenated flame retardants and phosphorus based flame retardants. Halogen flame retardant has good flame retardant effect, but HX with flame retardant is toxic corrosive gas, will be gradually eliminated; phosphorus flame retardant is low toxicity, but the flame retardant efficiency is low. In order to improve its flame retardant effect, phosphorus nitrogen synergistic flame retardant is adopted.
Intumescent flame retardant for polypropylene is a kind of flame retardant with phosphorus and nitrogen as its main composition. It has no halogen or antimony oxide as synergistic agent. It is an environmentally friendly flame retardant with high flame retardance. Intumescent flame retardant for polypropylene has become one of the active research fields, and it is also considered as one of the promising ways to realize halogen-free flame retardants.
The flame retardant mechanism of intumescent flame retardant for polypropylene is constantly updated. Domestic scholars generally believe that intumescent flame retardant system is generally composed of three parts: acid source, carbon source and gas source.
General inorganic acid or acid source is heated to a certain temperature to form a compound inorganic acid, such as phosphoric acid, phosphorus oxychloride, ammonium polyphosphate; carbon source is also called charring agent, which is formed based foam char layer, mainly some of the high carbon content of the polyhydroxy compounds, such as itrate the alcohol and starch source; also called foam source, commonly used melamine foam source, dicyandiamide etc.. Some foreign scholars believe that intumescent flame retardant consists of four parts: binder, charring agent, carbonized catalyst (acid source) and foaming agent.
The flame retardant mechanism of intumescent flame retardant is: when heated, the acid source decomposes to produce dehydrating agent, which can form ester with ester, ester, then dehydrate and crosslink to form carbon. At the same time, foaming agent releases a large amount of gas to help expand the carbon layer. The carbon layer thickness increases with the polymer surface carbon layer on the surface of the temperature gradient, the polymer surface temperature is much lower than the flame temperature, reducing the possibility of further degradation of polymer release of flammable gas, and cut off from the outside into the oxygen, which can effect on flame retardant polymer in quite a long period of time.
Triphenyl Phosphate (TPP)
The product output : 100 tons / month
Shipping Port: China Shanghai
Price offer is valid : 15 days
Export rights: the right to import and export company .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
In order to study the mechanism of flame retardant intumescent flame retardant, overcome before carbon layer material properties only 430 DEG C expansion of flame retardant system, SergeBourbigot by micro - Raman spectroscopy, 13C, 1H, 31P, NMR of solid ammonium polyphosphate and pentaerythritol intumescent flame retardant system of more than 430 DEG C spectrum. When the temperature rises, the expansion structure has also changed, 280 degrees are mainly aromatic and aliphatic molecules by phosphate (salt) bridge link; with the increase of temperature, the concentration of aromatic molecules increases, aromatic molecular groups occupy the main position of 560 DEG C, so the structure rigidity increase, the stress and deformation in difficulties. The carbon layer of the formation of P4O10 crystals. The study of carbonization mechanism of high temperature expansion phenomenon provides theoretical guidance for the synthesis of new intumescent flame retardant and flame retardant modification.
Ma Zhiling and so on through the expansion effect of IFR and application in polypropylene flame retardant effect research found that rigid structure of flame retardant has better flame retardant effect, IFR material to improve the flame retardant effect is the key to overcome the phenomenon of burning drops, improve the expansion effect.
The new modified intumescent flame retardant system is developing continuously. The intumescent flame retardant has developed rapidly since 90s. Many scholars at home and abroad have done a lot of research work on it.
For example, Xu Jiayan and Hu Yuan think that intumescent flame retardant is an effective way to realize the green and environment-friendly development of flame retardant materials. The intumescent flame retardant system composed of PVA and phosphorus compounds has good flame retardancy, but it is easy to coagulate when phosphoric acid and phosphate are used together with PVA. The water solubility of the system is destroyed, and it is easy to absorb moisture, and the phenomenon of salt and alkali appears. The phosphate ester is insoluble in water and can not be used together with PVA, which limits the application of the system.
Ma Zhiling, Zhao Wenji a (2-chloroethane) phosphate chloride with chloroform as the medium, through the removal of HCl esterification was grafted on PVA, get the flame retardant PVA, can be used alone, can also be used as intumescent flame retardants and other polymer blends.
The intumescent flame retardant carbon layer is brittle and exposed to temperatures above 500 air slow oxidation affects the flame retardant effect, BaljinderK.Kandola etc. according to the combustion behavior of flame retardant fiber and fabric mixed proposed by physical and chemical compatibility mechanism to form a reinforced carbon carbon bond layer or intumescent carbon layer fiber structure crosslinking, this structure has strong antioxidant, thereby enhancing the flame retardant effect, greatly slowed the degree of oxidation of carbon layer.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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