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Intumescent intumescent flame retardant of polyurethane foam
2017-11-27 10:58:26
Intumescent intumescent flame retardant of polyurethane foam
In this paper, the polyurethane foam intumescent reactive flame retardant is introduced, and the polyurethane foam intumescent reactive flame retardant has little pollution to the environment, and it develops very fast in recent years.
Polyurethane foam intumescent reactive flame retardant (1) 1- oxo -4- melamine carboxyl -2,6,7- three oxo -1- (2,2,2) octane, using PEAP as raw material, after hydroxylation with methyl acid, acyl chloride, and then reacted with melamine.
PEPA was obtained by reaction with concentrated nitric acid as oxidant and ammonium vanadate as catalyst at 60 OC for 7 hours. In the chlorobenzene solvent, the active two methyl chloro formamide was first formed by the action of two chloride sulfoxide and two methyl formamide, and then the carboxylic acid was converted into acyl chloride because of the steric effect of the double cage ring structure. The reaction was completed at 80 and 2 hours later. The final product was obtained by refluxing with melamine for 1.5 hours at 100 degrees centigrade. The theoretical phosphorus content is 11.31%, which is lower than 17.12% of PEPA. The theoretical carbon content is 30.66% and the theoretical nitrogen content is 30.66%.
Polyurethane foam P intumescent flame retardant reaction (2) and two (2,6,7- three oxa -1- oxy P 2,2,2 azabicyclo octane -4- Ya Jiaji) phosphate melamine compounds containing two caged bicyclic phosphate derivatives, which is composed of PEPA and three phosphorus oxychloride to 2:1 molar ratio reaction, get phosphoryl active chloride complexes with melamine reaction, get intumescent flame retardant containing two PEPA units in the molecule. Theoretical phosphorus content is 18.83%, theoretical carbon content is 24.29%, theoretical nitrogen content is 17%.
Under the action of three phosphorus oxychloride and acetonitrile, PEPA can get double PEPA phosphoryl chloride product. Because the steric effect of double cage solid structure is large and the reaction time is long, the reaction can be completed in 80 hours at about 20 hours. The reaction with melamine can be completed by 1.5 hours of reflux at 100 DEG C because of the active phosphoryl chloride.
Polyurethane foam intumescent reactive flame retardant (3) three (1- oxo -2,6,7- three oxo -1- [2,2,2] octane methylene -4) phosphate
When PEPA was reacted with three phosphorus oxychloride at 3:1 molar ratio, compounds containing 3 PEPA double cage structures could be obtained
In the presence of acetonitrile, the product can be obtained by refluxing with PEPA and three phosphorus oxychloride for 12 hours. The theoretical phosphorus content is 21.83%, and the theoretical carbon content is 31.69%. Lack of nitrogen and lack of gas. Therefore, the flame retardancy of intumescent flame retardant must be combined with melamine (MEL) and ammonium polyphosphate (APP).
Tris(2-chloroisopropyl)Phosphate(TCPP)
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.
Due to the transport process to avoid collision damage, Tris2-chloropropyl phosphate TCPP packaging methods generally used 250KG galvanized iron drum.
Below to introduce some of Tris2-chloropropyl phosphate TCPP packaging:
Net weight 250KG/ galvanized iron drum (a small cabinet pallet loaded 20 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Company 1.5 hour drive from Shanghai, the general sent to Shanghai port, the goods from customs inspection to the fastest one week after, the slowest ten days.
In view of the domestic and foreign demand is relatively small clients, also can use 50KG plastic bucket.
If you have special requirements on the Tris2-chloropropyl phosphate TCPP packaging, please contact us, try to meet the packaging requirements of customers.
Polyurethane foam intumescent reactive flame retardant (4), in addition to the double cage like phosphorus containing carbon compounds mentioned above, some people used pentaerythritol and phosphite three phenyl ester for transesterification reaction to obtain 4- hydroxymethyl -2, 6,7- three oxo -1- [2,2,2] PEPA octane]. The compound has a lower molecular weight of 164, a theoretical phosphorus content of 18.9%, and a theoretical carbon content of 36.6%. Because of the hydroxyl groups in the molecular structure, covalent bonds can be formed between the crosslinking agent and cellulose fibers, thus good water washable properties are obtained.
But the above compounds that do not contain nitrogen, for lack of gas known as intumescent flame retardant, and it is difficult to form a carbon foam layer, so the -2,4- with toluene diisocyanate (TDI) as crosslinking agent, and the cotton fiber and provide covalent crosslinking of gas, flame retardant finishing in acetone as solvent, acid butyl tin two laurel for two the catalyst at room temperature.
The flame retardant finishing of cotton fabric, the LOI value reached 32.1 after 12 times washing was kept at 27.9, long carbon 12cm, smoldering and continued burning time is zero, good flame retardant effect, washing resistance can be. But after flame retardant finishing, the strength decreased from 325N to 214N, decreased by 34.2%; flexural rigidity increased from 6.2 x 10-2CN.cm to 2 x 10-1CN.cm; the permeability decreased from 82.3mm/s to 66.7mm/s, and the wearing performance decreased greatly. Moreover, the cross linking agent TDI is suspected of being carcinogenic 2,4- two amino toluene, and organotin compounds are also suspected to be harmful. Acetone is a flammable solvent and should not be used in printing and dyeing enterprises.
Intumescent flame retardants are a kind of flame retardants which are developed rapidly in recent years. They are mainly composed of phosphorus and nitrogen, containing acid source (dehydrating agent), carbon source (carbon forming agent) and gas source (foaming agent). Through this kind of flame retardant in plastics or by adding flame retardant finishing in textile, burning on the surface can form a layer of foam carbon layer can heat and oxygen, smoke suppression, and to prevent the synthesis of materials to produce droplet and terminate the chain reaction function, has good properties of flame retardant materials.
Due to the requirements of flame retardants, low toxicity and low smoke, the intumescent flame retardant provides a good opportunity for the development of traditional halogen flame retardants in the difficult situation. Nowadays, many intumescent flame retardants have been commercialized and are being popularized, and many types of intumescent flame retardants are in the stage of research and have good prospects for development.
Compared with the traditional halogen flame retardant, intumescent flame retardant has a remarkable special class, when its dosage is lower than a certain amount, its flame retardant properties are very small; but when its dosage exceeds a certain value, the flame retardant performance increases rapidly. This value is related to the flame retardant material and must be matched with it. The flame retardancy of halogenated flame retardants increases linearly with the increase of the amount of the flame retardants.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In this paper, the polyurethane foam intumescent reactive flame retardant is introduced, and the polyurethane foam intumescent reactive flame retardant has little pollution to the environment, and it develops very fast in recent years.
Polyurethane foam intumescent reactive flame retardant (1) 1- oxo -4- melamine carboxyl -2,6,7- three oxo -1- (2,2,2) octane, using PEAP as raw material, after hydroxylation with methyl acid, acyl chloride, and then reacted with melamine.
PEPA was obtained by reaction with concentrated nitric acid as oxidant and ammonium vanadate as catalyst at 60 OC for 7 hours. In the chlorobenzene solvent, the active two methyl chloro formamide was first formed by the action of two chloride sulfoxide and two methyl formamide, and then the carboxylic acid was converted into acyl chloride because of the steric effect of the double cage ring structure. The reaction was completed at 80 and 2 hours later. The final product was obtained by refluxing with melamine for 1.5 hours at 100 degrees centigrade. The theoretical phosphorus content is 11.31%, which is lower than 17.12% of PEPA. The theoretical carbon content is 30.66% and the theoretical nitrogen content is 30.66%.
Polyurethane foam P intumescent flame retardant reaction (2) and two (2,6,7- three oxa -1- oxy P 2,2,2 azabicyclo octane -4- Ya Jiaji) phosphate melamine compounds containing two caged bicyclic phosphate derivatives, which is composed of PEPA and three phosphorus oxychloride to 2:1 molar ratio reaction, get phosphoryl active chloride complexes with melamine reaction, get intumescent flame retardant containing two PEPA units in the molecule. Theoretical phosphorus content is 18.83%, theoretical carbon content is 24.29%, theoretical nitrogen content is 17%.
Under the action of three phosphorus oxychloride and acetonitrile, PEPA can get double PEPA phosphoryl chloride product. Because the steric effect of double cage solid structure is large and the reaction time is long, the reaction can be completed in 80 hours at about 20 hours. The reaction with melamine can be completed by 1.5 hours of reflux at 100 DEG C because of the active phosphoryl chloride.
Polyurethane foam intumescent reactive flame retardant (3) three (1- oxo -2,6,7- three oxo -1- [2,2,2] octane methylene -4) phosphate
When PEPA was reacted with three phosphorus oxychloride at 3:1 molar ratio, compounds containing 3 PEPA double cage structures could be obtained
In the presence of acetonitrile, the product can be obtained by refluxing with PEPA and three phosphorus oxychloride for 12 hours. The theoretical phosphorus content is 21.83%, and the theoretical carbon content is 31.69%. Lack of nitrogen and lack of gas. Therefore, the flame retardancy of intumescent flame retardant must be combined with melamine (MEL) and ammonium polyphosphate (APP).
Tris(2-chloroisopropyl)Phosphate(TCPP)
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.
Due to the transport process to avoid collision damage, Tris2-chloropropyl phosphate TCPP packaging methods generally used 250KG galvanized iron drum.
Below to introduce some of Tris2-chloropropyl phosphate TCPP packaging:
Net weight 250KG/ galvanized iron drum (a small cabinet pallet loaded 20 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Company 1.5 hour drive from Shanghai, the general sent to Shanghai port, the goods from customs inspection to the fastest one week after, the slowest ten days.
In view of the domestic and foreign demand is relatively small clients, also can use 50KG plastic bucket.
If you have special requirements on the Tris2-chloropropyl phosphate TCPP packaging, please contact us, try to meet the packaging requirements of customers.
Polyurethane foam intumescent reactive flame retardant (4), in addition to the double cage like phosphorus containing carbon compounds mentioned above, some people used pentaerythritol and phosphite three phenyl ester for transesterification reaction to obtain 4- hydroxymethyl -2, 6,7- three oxo -1- [2,2,2] PEPA octane]. The compound has a lower molecular weight of 164, a theoretical phosphorus content of 18.9%, and a theoretical carbon content of 36.6%. Because of the hydroxyl groups in the molecular structure, covalent bonds can be formed between the crosslinking agent and cellulose fibers, thus good water washable properties are obtained.
But the above compounds that do not contain nitrogen, for lack of gas known as intumescent flame retardant, and it is difficult to form a carbon foam layer, so the -2,4- with toluene diisocyanate (TDI) as crosslinking agent, and the cotton fiber and provide covalent crosslinking of gas, flame retardant finishing in acetone as solvent, acid butyl tin two laurel for two the catalyst at room temperature.
The flame retardant finishing of cotton fabric, the LOI value reached 32.1 after 12 times washing was kept at 27.9, long carbon 12cm, smoldering and continued burning time is zero, good flame retardant effect, washing resistance can be. But after flame retardant finishing, the strength decreased from 325N to 214N, decreased by 34.2%; flexural rigidity increased from 6.2 x 10-2CN.cm to 2 x 10-1CN.cm; the permeability decreased from 82.3mm/s to 66.7mm/s, and the wearing performance decreased greatly. Moreover, the cross linking agent TDI is suspected of being carcinogenic 2,4- two amino toluene, and organotin compounds are also suspected to be harmful. Acetone is a flammable solvent and should not be used in printing and dyeing enterprises.
Intumescent flame retardants are a kind of flame retardants which are developed rapidly in recent years. They are mainly composed of phosphorus and nitrogen, containing acid source (dehydrating agent), carbon source (carbon forming agent) and gas source (foaming agent). Through this kind of flame retardant in plastics or by adding flame retardant finishing in textile, burning on the surface can form a layer of foam carbon layer can heat and oxygen, smoke suppression, and to prevent the synthesis of materials to produce droplet and terminate the chain reaction function, has good properties of flame retardant materials.
Due to the requirements of flame retardants, low toxicity and low smoke, the intumescent flame retardant provides a good opportunity for the development of traditional halogen flame retardants in the difficult situation. Nowadays, many intumescent flame retardants have been commercialized and are being popularized, and many types of intumescent flame retardants are in the stage of research and have good prospects for development.
Compared with the traditional halogen flame retardant, intumescent flame retardant has a remarkable special class, when its dosage is lower than a certain amount, its flame retardant properties are very small; but when its dosage exceeds a certain value, the flame retardant performance increases rapidly. This value is related to the flame retardant material and must be matched with it. The flame retardancy of halogenated flame retardants increases linearly with the increase of the amount of the flame retardants.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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