News Details
Synergistic flame retardant of polyolefin
2017-11-13 10:48:22
Synergistic flame retardant of polyolefin
Polyolefin synergistic flame retardant mainly has three phosphoric acid phenyl ester, tricresyl phosphate ester, three, toluene two phosphoric acid phenyl ester, cumene, phosphate, phosphate, phosphoric acid and styrene butadiene, three ester, poly olefine commonly used phosphorus synergistic flame retardant synergistic flame retardant, red phosphorus, phosphate flame retardant ammonium polyphosphate flame retardant and phosphate flame retardants.
Study on synergistic flame retardant Wang by Fu Liye infrared spectroscopy, pyrolysis gas chromatography, TGA of polyolefin, Mg (OH) 2 red phosphorus synergistic flame retardant LLDPE, results showed that red phosphorus and Mg (OH) 2 not only increased the thermal stability of LLDPE, and the molecular product of LLDPE strand breaks after the amount is also very high.
Synergistic flame retardant polyolefin is red to purplish red powder, because of its only phosphorus element, so compared with other phosphorus compounds, red phosphorus flame retardant efficiency. According to reports in the literature containing 8% HDPE of the red phosphorus flame retardant level can reach UL294V20.
However there are also the same red phosphorus polyethylene resin poor compatibility, easy moisture absorption, the color is too dark, is not enough to produce toxic gases such as hydrogen phosphine. In order to overcome these shortcomings, it is now common practice of red phosphorus microencapsulation or coating. In the red phosphorus microcapsule after treatment can improve its compatibility with the resin, reduce hygroscopicity.
Can be used for encapsulated red phosphorus materials melamine resin, melamine formaldehyde resin and polyvinyl alcohol. According to literature reports microencapsulation research cooperation with Anhui Chemical Industry Research Institute of University of Science & Technology China, National Laboratory of Fire Science in the red phosphorus surface after drying to form compact film, compared with ordinary red phosphorus microencapsulation in ignition and hygroscopicity were improved.
Chiang LDPE was first treated by argon plasma PLDPE and the polarity of PLDPE2g2MAH grafted with maleic anhydride and then adding flame retardant on the flame retardant treatment and determination of the oxygen index. The experimental results showed that when the content of flame retardant was 32% (WT), the LOI was 3415, and the LOI increased with the increase of grafting ratio under the condition of constant flame retardant dosage.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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 summary, although the flame retardant effect of phosphorus based flame retardant is better, because of the poor water resistance of phosphorus flame retardant and poor compatibility with polyolefin, the mechanical properties of flame retardant products are poor, so it is not widely used in polyolefin materials at present.
At present, the most commonly used metal compound flame retardant is Sb2O3 (ATO). When it is used alone, the flame retardant effect is general, so it can not be classified as flame retardant. It has good flame retardant effect and smoke suppression effect, so it can be used as flame retardant synergist of halogen flame retardants. In addition, the finer the particle size of Sb2O3 is, the better the flame retardant effect is and the less the amount is added. Because of the high price of Sb2O3, Sb2O3 substitutes such as zinc borate, Zinc Oxide, iron oxide, tin oxide, zinc stannate and zinc stannate have been developed in recent years.
The metal boride is generally zinc borate hydrate system, in 290 ~ 450 degrees will release 1315% crystal water, and the heat absorption of 503J II G. As a flame retardant, it can be used alone and is a cheap substitute for Sb2O3. Like Sb2O3, the flame retardant effect is not good when it is used alone, and it is generally joined with other flame retardants.
Intumescent flame retardant (IFR) is not a single flame retardant variety, but a halogen free composite flame retardant with phosphorus, nitrogen and carbon as its main components. It does not contain halogen and does not use Sb2O3 as a synergistic agent, and its own synergistic effect in the system. Because this kind of flame retardant is foaming when heated, it is called intumescent flame retardant.
Containing intumescent flame retardant plastic in the combustion surface will generate carbon foam, to heat and oxygen, smoke suppression, anti droplet effect, has excellent flame retardant properties, but also has the advantages of no halogen, low smoke, low toxicity, anti dropping and non corrosive gases, in line with the future direction of development of flame retardant agent, has very broad prospects for development. At present, there is little application in China, and foreign countries have begun to take shape.
Intumescent flame retardants are generally composed of three parts: acid source, carbon source and gas source. The specific three components are as follows: (1) acid source, also known as dehydrating agent, catalyst or carbonization accelerant. Generally inorganic or inorganic acid compounds, and can act with the resin to promote the formation of charring; (2) carbon source is also known as charring agent.
Mainly for some of the higher carbon content of polyhydroxy compounds or carbohydrates; (3) gas source is also known as foaming agent, can release inert gas. For nitrogen containing compounds, such as amines and amides, nitrogen compounds play a role in promoting the formation of charring layer besides foaming. For specific intumescent flame retardants, the above three components are not always available, sometimes only need to add one or more. Such as polyethylene resin, itself is a hydrocarbon, can be used as carbon agent, the system only need to add foaming agent and dehydrating agent can.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polyolefin synergistic flame retardant mainly has three phosphoric acid phenyl ester, tricresyl phosphate ester, three, toluene two phosphoric acid phenyl ester, cumene, phosphate, phosphate, phosphoric acid and styrene butadiene, three ester, poly olefine commonly used phosphorus synergistic flame retardant synergistic flame retardant, red phosphorus, phosphate flame retardant ammonium polyphosphate flame retardant and phosphate flame retardants.
Study on synergistic flame retardant Wang by Fu Liye infrared spectroscopy, pyrolysis gas chromatography, TGA of polyolefin, Mg (OH) 2 red phosphorus synergistic flame retardant LLDPE, results showed that red phosphorus and Mg (OH) 2 not only increased the thermal stability of LLDPE, and the molecular product of LLDPE strand breaks after the amount is also very high.
Synergistic flame retardant polyolefin is red to purplish red powder, because of its only phosphorus element, so compared with other phosphorus compounds, red phosphorus flame retardant efficiency. According to reports in the literature containing 8% HDPE of the red phosphorus flame retardant level can reach UL294V20.
However there are also the same red phosphorus polyethylene resin poor compatibility, easy moisture absorption, the color is too dark, is not enough to produce toxic gases such as hydrogen phosphine. In order to overcome these shortcomings, it is now common practice of red phosphorus microencapsulation or coating. In the red phosphorus microcapsule after treatment can improve its compatibility with the resin, reduce hygroscopicity.
Can be used for encapsulated red phosphorus materials melamine resin, melamine formaldehyde resin and polyvinyl alcohol. According to literature reports microencapsulation research cooperation with Anhui Chemical Industry Research Institute of University of Science & Technology China, National Laboratory of Fire Science in the red phosphorus surface after drying to form compact film, compared with ordinary red phosphorus microencapsulation in ignition and hygroscopicity were improved.
Chiang LDPE was first treated by argon plasma PLDPE and the polarity of PLDPE2g2MAH grafted with maleic anhydride and then adding flame retardant on the flame retardant treatment and determination of the oxygen index. The experimental results showed that when the content of flame retardant was 32% (WT), the LOI was 3415, and the LOI increased with the increase of grafting ratio under the condition of constant flame retardant dosage.
Triphenyl Phosphate (TPP)
Triphenyl Phosphatetpp-cas: 15-86-6
EINECS number: 204-112-2
Chinese Name: Triphenyl Phosphate
Chinese alias: phosphoric acid three phenyl ester; flame retardant TPP; TPP
English Name: Triphenyl Phosphate
English alias: Triphenyl Phosphate free of phenol; Triphenyl Phosphate (TPPa); Triphenyl Phosphate white XTL Phosphoric acid triphenyl ester; TPP
Molecular formula: C18H15O4P; OP (OC6H5) 3
Appearance and properties: white crystalline powder, odorless, slightly deliquescence
Molecular weight: 326.29
Steam pressure: 0.01kPa/20 ℃
The above is the product of the CAS, such as Triphenyl Phosphate tpp-cas: 15-86-6 other information please contact us!
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 summary, although the flame retardant effect of phosphorus based flame retardant is better, because of the poor water resistance of phosphorus flame retardant and poor compatibility with polyolefin, the mechanical properties of flame retardant products are poor, so it is not widely used in polyolefin materials at present.
At present, the most commonly used metal compound flame retardant is Sb2O3 (ATO). When it is used alone, the flame retardant effect is general, so it can not be classified as flame retardant. It has good flame retardant effect and smoke suppression effect, so it can be used as flame retardant synergist of halogen flame retardants. In addition, the finer the particle size of Sb2O3 is, the better the flame retardant effect is and the less the amount is added. Because of the high price of Sb2O3, Sb2O3 substitutes such as zinc borate, Zinc Oxide, iron oxide, tin oxide, zinc stannate and zinc stannate have been developed in recent years.
The metal boride is generally zinc borate hydrate system, in 290 ~ 450 degrees will release 1315% crystal water, and the heat absorption of 503J II G. As a flame retardant, it can be used alone and is a cheap substitute for Sb2O3. Like Sb2O3, the flame retardant effect is not good when it is used alone, and it is generally joined with other flame retardants.
Intumescent flame retardant (IFR) is not a single flame retardant variety, but a halogen free composite flame retardant with phosphorus, nitrogen and carbon as its main components. It does not contain halogen and does not use Sb2O3 as a synergistic agent, and its own synergistic effect in the system. Because this kind of flame retardant is foaming when heated, it is called intumescent flame retardant.
Containing intumescent flame retardant plastic in the combustion surface will generate carbon foam, to heat and oxygen, smoke suppression, anti droplet effect, has excellent flame retardant properties, but also has the advantages of no halogen, low smoke, low toxicity, anti dropping and non corrosive gases, in line with the future direction of development of flame retardant agent, has very broad prospects for development. At present, there is little application in China, and foreign countries have begun to take shape.
Intumescent flame retardants are generally composed of three parts: acid source, carbon source and gas source. The specific three components are as follows: (1) acid source, also known as dehydrating agent, catalyst or carbonization accelerant. Generally inorganic or inorganic acid compounds, and can act with the resin to promote the formation of charring; (2) carbon source is also known as charring agent.
Mainly for some of the higher carbon content of polyhydroxy compounds or carbohydrates; (3) gas source is also known as foaming agent, can release inert gas. For nitrogen containing compounds, such as amines and amides, nitrogen compounds play a role in promoting the formation of charring layer besides foaming. For specific intumescent flame retardants, the above three components are not always available, sometimes only need to add one or more. Such as polyethylene resin, itself is a hydrocarbon, can be used as carbon agent, the system only need to add foaming agent and dehydrating agent can.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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