News Details
Phospho-nitrogen mixed expansion flame retardant
2017-10-25 12:00:43
Phospho-nitrogen mixed expansion flame retardant
Expansive flame retardant is composed of acid source, gas source and carbon source. The acid source of phospho-nitrogen mixed expansive flame retardant is inorganic acid or the compound which is heated to produce inorganic acid, and the most used is polyphosphate (APP). The source of the gas is also known as foaming source, which is usually a compound with high nitrogen content, such as melamine (MEL), dicyandiamide, etc. The carbon source is a compound that forms foam carbon layer, which is a few polyhydroxy compounds with high carbon content such as pentaerythritol (PER).
For ammonium polyphosphate (NH4) n+2PnO3n+1,n=10~ 20, for short chain APP (water solubility APP), n > 20 is long chain APP (water insoluble). The structure is as follows:
The theoretical phosphorus content was 31.92% and the theoretical nitrogen content was 14.44%. APP has 5 kinds of crystal structure, namely Ⅰ, Ⅱ Ⅲ, Ⅳ and Ⅴ type, including Ⅲ type for Ⅰ type into type Ⅱ intermediates. In certain conditions, you can transform each other. Commonly used type is Ⅰ and Ⅱ, Ⅰ type for the linear chain, decomposition temperature is low, water soluble than 4 g / 100 cm3, greatly Ⅱ molecule chain links between a certain amount of P - P - O, degree of polymerization of n is greater than Ⅰ type, the initial decomposition temperature about 300 ℃, water soluble small below 0.5 g / 100 cm3.
The APP is non-toxic, acute toxicity, and the half lethal dose of rats orally is LD50 > 10g/kg.
Melamine is the source of gas because it has a high nitrogen content of 66.66%.
Pentaerythritol (PER) is a carbon source because of its high carbon content of 44.11%.
Ammonium polyphosphate (APP) is an acid source and a source of gas.
The phospho-nitrogen mixed expansion flame retardant mainly produces flame retardant effect in solidification phase by forming multi-empty foam carbon layer. The formation process of carbon layer is as follows: at low temperature, the acid decomposition of source esterification and diversity as inorganic base of dehydration, with the increase of temperature inorganic alkali and polyols for esterification reaction and make the system to melt. Melamine is vaporized from the solid phase to degrade the gaseous compounds of small molecules, such as NH3, N2, CO2 CO, etc., and water vapor, which expands the carbon layer.
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.
At the same time, polyol and ester dehydrate into carbon, forming inorganic and carbon residue, and further expanding foaming. When the reaction is close to completion, the system coking and solidifying, forming a porous foam carbon layer. Make hot difficult to penetrate into the phase of solidification, stop the spread of the oxygen from the surrounding medium into are degradation of polymer materials, and can stop on the generated gas or liquid product escape material surface, thus achieve flame retardant effect.
The phosphorus-nitrogen mixed expansion flame retardant has been used in plastics, rubber and other synthetic high polymer flame retardants, but it is rarely reported for textile materials, especially the flame retardant finishing of cellulose fibers. In recent days, colleges and universities have conducted exploratory research on this kind of flame retardant, and obtained certain results. The following cases:
1.10 gAPP (water soluble), 1 gper, 8 gmei (both for pure chemicals) on cotton 2 no.2 rolling (rolling rate of more than 90%), preliminary drying (90 ℃), baking (150 ℃), the flame retardant test, the flame retardant cotton of the LOI increased to 32% from 19% pure cotton, vertical burning test carbon loss length is 8.8 cm, smoldering and continue burning time all is 0 seconds, visible flame retardant cotton has good flame retardant effect.
2. The APP/MEL binary compound with flame retardants for flax fabric more than two dip two grinding rate 90%), preliminary drying (90 ℃), baking (150 ℃), flame retardant, mass fraction of 20% ~ 25%, the LOI for 36 and 37, carbon loss 10 cm in length, smoldering and continue burning time all is 0 seconds, suggests that flax fabric has good flame retardant performance. But without the carbon source of pentaerythritol, how to form a foam carbon layer.
3. APP, PER and MEL hybrid expansion type flame retardant additives such as generally bigger, will be more than 20% (wt %) of flame retardant material, water resistance and flame retardant fabric is poor, in order to enhance the results of the expansion of the flame retardant effect, increase the stability of coal layer and viscoelasticity, and reduce the IFR adding amount, adding molecular sieve in flame retardant system. It can not only enhance the flame retardant effect, but also improve the mechanical properties and flame retardant function of the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Expansive flame retardant is composed of acid source, gas source and carbon source. The acid source of phospho-nitrogen mixed expansive flame retardant is inorganic acid or the compound which is heated to produce inorganic acid, and the most used is polyphosphate (APP). The source of the gas is also known as foaming source, which is usually a compound with high nitrogen content, such as melamine (MEL), dicyandiamide, etc. The carbon source is a compound that forms foam carbon layer, which is a few polyhydroxy compounds with high carbon content such as pentaerythritol (PER).
For ammonium polyphosphate (NH4) n+2PnO3n+1,n=10~ 20, for short chain APP (water solubility APP), n > 20 is long chain APP (water insoluble). The structure is as follows:
The theoretical phosphorus content was 31.92% and the theoretical nitrogen content was 14.44%. APP has 5 kinds of crystal structure, namely Ⅰ, Ⅱ Ⅲ, Ⅳ and Ⅴ type, including Ⅲ type for Ⅰ type into type Ⅱ intermediates. In certain conditions, you can transform each other. Commonly used type is Ⅰ and Ⅱ, Ⅰ type for the linear chain, decomposition temperature is low, water soluble than 4 g / 100 cm3, greatly Ⅱ molecule chain links between a certain amount of P - P - O, degree of polymerization of n is greater than Ⅰ type, the initial decomposition temperature about 300 ℃, water soluble small below 0.5 g / 100 cm3.
The APP is non-toxic, acute toxicity, and the half lethal dose of rats orally is LD50 > 10g/kg.
Melamine is the source of gas because it has a high nitrogen content of 66.66%.
Pentaerythritol (PER) is a carbon source because of its high carbon content of 44.11%.
Ammonium polyphosphate (APP) is an acid source and a source of gas.
The phospho-nitrogen mixed expansion flame retardant mainly produces flame retardant effect in solidification phase by forming multi-empty foam carbon layer. The formation process of carbon layer is as follows: at low temperature, the acid decomposition of source esterification and diversity as inorganic base of dehydration, with the increase of temperature inorganic alkali and polyols for esterification reaction and make the system to melt. Melamine is vaporized from the solid phase to degrade the gaseous compounds of small molecules, such as NH3, N2, CO2 CO, etc., and water vapor, which expands the carbon layer.
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.
At the same time, polyol and ester dehydrate into carbon, forming inorganic and carbon residue, and further expanding foaming. When the reaction is close to completion, the system coking and solidifying, forming a porous foam carbon layer. Make hot difficult to penetrate into the phase of solidification, stop the spread of the oxygen from the surrounding medium into are degradation of polymer materials, and can stop on the generated gas or liquid product escape material surface, thus achieve flame retardant effect.
The phosphorus-nitrogen mixed expansion flame retardant has been used in plastics, rubber and other synthetic high polymer flame retardants, but it is rarely reported for textile materials, especially the flame retardant finishing of cellulose fibers. In recent days, colleges and universities have conducted exploratory research on this kind of flame retardant, and obtained certain results. The following cases:
1.10 gAPP (water soluble), 1 gper, 8 gmei (both for pure chemicals) on cotton 2 no.2 rolling (rolling rate of more than 90%), preliminary drying (90 ℃), baking (150 ℃), the flame retardant test, the flame retardant cotton of the LOI increased to 32% from 19% pure cotton, vertical burning test carbon loss length is 8.8 cm, smoldering and continue burning time all is 0 seconds, visible flame retardant cotton has good flame retardant effect.
2. The APP/MEL binary compound with flame retardants for flax fabric more than two dip two grinding rate 90%), preliminary drying (90 ℃), baking (150 ℃), flame retardant, mass fraction of 20% ~ 25%, the LOI for 36 and 37, carbon loss 10 cm in length, smoldering and continue burning time all is 0 seconds, suggests that flax fabric has good flame retardant performance. But without the carbon source of pentaerythritol, how to form a foam carbon layer.
3. APP, PER and MEL hybrid expansion type flame retardant additives such as generally bigger, will be more than 20% (wt %) of flame retardant material, water resistance and flame retardant fabric is poor, in order to enhance the results of the expansion of the flame retardant effect, increase the stability of coal layer and viscoelasticity, and reduce the IFR adding amount, adding molecular sieve in flame retardant system. It can not only enhance the flame retardant effect, but also improve the mechanical properties and flame retardant function of the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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