News Details
Flame retardants for Polyurethane
2017-11-12 14:59:27
Flame retardants for Polyurethane
For polyurethane flame retardants, in 70s of last century, only flame retardant (fire protection) was required. In 80s, polyurethane flame retardant was used as flame retardant and smoke suppressant function. In 90s, flame retardant system was also required to be non-toxic.
After entering the new century, the environmental effect is the key point to be considered when choosing the flame retardant technology and flame retardant system of elastic materials. Therefore, the polyurethane flame retardant used abroad is to achieve high efficiency (fire protection), low smoke, low toxicity, and friendly to the environment.
Polyurethane flame retardant methods are generally the following. (1) to physically join in gaseous or condensed phase or at the same time play flame retardant effect in two phases, and usually adopts composite flame-retardant system composed of a variety of flame retardant; (2) adding charring agent and catalyst, in order to improve the polyurethane in the heat of charring rate (; 3) and other polymers (including polyurethane) modification; (4) by physical or chemical means, improve the degree of Crosslinking Polyurethane; (5) a polyurethane / inorganic nano composite materials and nano inorganic compound; (6) the introduction of flame retardant elements in polyurethane macromolecules (halogen, phosphorus, nitrogen, etc.) preparation of flame retardant polyurethane essence. But at this stage, flame retardant polyurethane is still the first method, the second and the three methods have been adopted, but the latter three methods, or because of the process, or because of the cost, or because of other reasons, is still in the laboratory research stage.
Up to now, most of the flame retardants for polyurethane at home and abroad still adopt halogen antimony flame retardant system. There are ten bromine two benzene bond, six bromine ring twelve alkane, four bromine bisphenol A, ten bromine two phenyl ethane, etc..
Halogen antimony system is mainly through the capture of reactive free radicals in the gas phase to play the role of flame retardant, high flame retardant efficiency, sex / price ratio is excellent. However, due to the high content of smoke and toxic gas, especially the problem of dioxin, and some halogenated flame retardants themselves also endanger human health and environment, halogen antimony system is being treated prudently, and is becoming increasingly popular.
Now, the hazards of some halogenated flame retardants are being evaluated. According to the existing evaluation results, the European Union promulgated the RoHS directive in January 2003, requiring that five bromine and eight bromo two phenyl ether should be banned from the 10 new electronic and electrical products in EU countries since July 2006. As for the widespread use of decabromodiphenyl oxide in flame retardant polyurethane, the assessment was not found on the environment and human health hazards significantly. It is an inevitable trend to gradually use halogen-free flame retardant system in flame retardant polyurethane. Therefore, the research on the substitution of halogenated flame retardants has been paid more attention for the last 20 years.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Product Name: Tris (1,3-Dichloro-2-Propyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; (1,3-Dichloro-2-Propyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; Tris (1,3-Dichloroisopropyl) Tris (1,3-Dichloro-2-Propyl) Phosphate (TDCPP); TCPP Tris (2-Chloropropyl) Phosphate, Flame Retardant TDCPP
1,3-Dichloro-2-Propanolphosphate (3: 1); 1,3-Dichloro-2-Propanolophosphate (3: 1) 2-Propanol, 1,3-Dichloro, Phosphate (3: 1); 2-Propanol, 1,3-Dichloro-, Phosphate (3: 1) ); Crp (Fireproofingagent); Emulsion 212
CAS No.:13674-87-8
EINECS Number: 237-159-2
Molecular Formula: C9H15Cl6O4P
Molecular Weight: 430.9
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.
Inorganic metal hydrate is one of the most popular polyurethane flame retardants (and fillers), among which the most important are ATH and MH. They are non-toxic, low smoke, cheap, environmentally friendly, but their flame retardant efficiency is low, the need for large amount of added. For example, the natural polyurethane, adding 75phr MH and 5phr were up to 35% red phosphorus, oxygen index of flame retardant polyurethane, flame retardant grade V-O UL94. For polyolefin polyurethane, the MH of 170phr should be added to the oxygen index of 40%. For three yuan ethylene propylene polyurethane, when adding 150 ~ 200phr ATH or MH, it can have UL94V-0 flame retardant grade. But if ATH or MH is used as smoke suppressant in flame retardant polyurethane, 15 ~ 30phr can be used together.
In order to give full play to the flame retardant efficiency of ATH and MH in polyurethane, the following measures are usually taken. (1) combined with other flame retardants to form a synergistic system. For example, 5 ~ 10phr (red phosphorus coated) can greatly improve the efficiency of flame retardant ATH and MH. Moreover, in some cases, there is synergistic effect between ATH and MH. For example, adding 50phrATH and 50phr MH in ethylene acrylate elastomer, the material has low smoke yield, and has UL94V-O flame retardant grade. (2) surface modified ATH and MH are used, and different surface modifiers are suitable for different polyurethanes. (3) proper size and size distribution should be provided. (4) special attention should be paid to the influence of a small amount of impurities on the electrical properties of flame retardant polyurethane cable material.
Considering environmental protection and other factors, it is appropriate to increase the use of ATH and MH in flame retardant polymers, as well as in flame retardant polyurethanes. At present, the amount of ATH flame retardants in the United States, Western Europe and Japan reaches 50% - 55%, 40% - 45% and 30% of the total amount of flame retardant, respectively, while the proportion of China's flame retardant is estimated below 10%, which is worth considering. Of course, this is related to the structure of flame retardant products in china.
The flame retardant polyurethane, flame retardant agent is used, mainly with ammonium polyphosphate (APP), red phosphorus, three aryl phosphate and three alkyl esters, Halogenated Phosphate etc.. APP also contains phosphorus and nitrogen, which can be used alone for flame retardant polyurethane (but not in good effect), but more often as an acid component of intumescent flame retardants for flame retardant polyurethanes. For example, a system consisting of 70% ethylene propylene rubber, 20%AAP, 8%, three triazine compounds and 2% other additives has a UL 94V-O flame retardant grade.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
For polyurethane flame retardants, in 70s of last century, only flame retardant (fire protection) was required. In 80s, polyurethane flame retardant was used as flame retardant and smoke suppressant function. In 90s, flame retardant system was also required to be non-toxic.
After entering the new century, the environmental effect is the key point to be considered when choosing the flame retardant technology and flame retardant system of elastic materials. Therefore, the polyurethane flame retardant used abroad is to achieve high efficiency (fire protection), low smoke, low toxicity, and friendly to the environment.
Polyurethane flame retardant methods are generally the following. (1) to physically join in gaseous or condensed phase or at the same time play flame retardant effect in two phases, and usually adopts composite flame-retardant system composed of a variety of flame retardant; (2) adding charring agent and catalyst, in order to improve the polyurethane in the heat of charring rate (; 3) and other polymers (including polyurethane) modification; (4) by physical or chemical means, improve the degree of Crosslinking Polyurethane; (5) a polyurethane / inorganic nano composite materials and nano inorganic compound; (6) the introduction of flame retardant elements in polyurethane macromolecules (halogen, phosphorus, nitrogen, etc.) preparation of flame retardant polyurethane essence. But at this stage, flame retardant polyurethane is still the first method, the second and the three methods have been adopted, but the latter three methods, or because of the process, or because of the cost, or because of other reasons, is still in the laboratory research stage.
Up to now, most of the flame retardants for polyurethane at home and abroad still adopt halogen antimony flame retardant system. There are ten bromine two benzene bond, six bromine ring twelve alkane, four bromine bisphenol A, ten bromine two phenyl ethane, etc..
Halogen antimony system is mainly through the capture of reactive free radicals in the gas phase to play the role of flame retardant, high flame retardant efficiency, sex / price ratio is excellent. However, due to the high content of smoke and toxic gas, especially the problem of dioxin, and some halogenated flame retardants themselves also endanger human health and environment, halogen antimony system is being treated prudently, and is becoming increasingly popular.
Now, the hazards of some halogenated flame retardants are being evaluated. According to the existing evaluation results, the European Union promulgated the RoHS directive in January 2003, requiring that five bromine and eight bromo two phenyl ether should be banned from the 10 new electronic and electrical products in EU countries since July 2006. As for the widespread use of decabromodiphenyl oxide in flame retardant polyurethane, the assessment was not found on the environment and human health hazards significantly. It is an inevitable trend to gradually use halogen-free flame retardant system in flame retardant polyurethane. Therefore, the research on the substitution of halogenated flame retardants has been paid more attention for the last 20 years.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Product Name: Tris (1,3-Dichloro-2-Propyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; (1,3-Dichloro-2-Propyl) Phosphate; Tris (1,3-Dichloroisopropyl) Phosphate; Tris (1,3-Dichloroisopropyl) Tris (1,3-Dichloro-2-Propyl) Phosphate (TDCPP); TCPP Tris (2-Chloropropyl) Phosphate, Flame Retardant TDCPP
1,3-Dichloro-2-Propanolphosphate (3: 1); 1,3-Dichloro-2-Propanolophosphate (3: 1) 2-Propanol, 1,3-Dichloro, Phosphate (3: 1); 2-Propanol, 1,3-Dichloro-, Phosphate (3: 1) ); Crp (Fireproofingagent); Emulsion 212
CAS No.:13674-87-8
EINECS Number: 237-159-2
Molecular Formula: C9H15Cl6O4P
Molecular Weight: 430.9
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.
Inorganic metal hydrate is one of the most popular polyurethane flame retardants (and fillers), among which the most important are ATH and MH. They are non-toxic, low smoke, cheap, environmentally friendly, but their flame retardant efficiency is low, the need for large amount of added. For example, the natural polyurethane, adding 75phr MH and 5phr were up to 35% red phosphorus, oxygen index of flame retardant polyurethane, flame retardant grade V-O UL94. For polyolefin polyurethane, the MH of 170phr should be added to the oxygen index of 40%. For three yuan ethylene propylene polyurethane, when adding 150 ~ 200phr ATH or MH, it can have UL94V-0 flame retardant grade. But if ATH or MH is used as smoke suppressant in flame retardant polyurethane, 15 ~ 30phr can be used together.
In order to give full play to the flame retardant efficiency of ATH and MH in polyurethane, the following measures are usually taken. (1) combined with other flame retardants to form a synergistic system. For example, 5 ~ 10phr (red phosphorus coated) can greatly improve the efficiency of flame retardant ATH and MH. Moreover, in some cases, there is synergistic effect between ATH and MH. For example, adding 50phrATH and 50phr MH in ethylene acrylate elastomer, the material has low smoke yield, and has UL94V-O flame retardant grade. (2) surface modified ATH and MH are used, and different surface modifiers are suitable for different polyurethanes. (3) proper size and size distribution should be provided. (4) special attention should be paid to the influence of a small amount of impurities on the electrical properties of flame retardant polyurethane cable material.
Considering environmental protection and other factors, it is appropriate to increase the use of ATH and MH in flame retardant polymers, as well as in flame retardant polyurethanes. At present, the amount of ATH flame retardants in the United States, Western Europe and Japan reaches 50% - 55%, 40% - 45% and 30% of the total amount of flame retardant, respectively, while the proportion of China's flame retardant is estimated below 10%, which is worth considering. Of course, this is related to the structure of flame retardant products in china.
The flame retardant polyurethane, flame retardant agent is used, mainly with ammonium polyphosphate (APP), red phosphorus, three aryl phosphate and three alkyl esters, Halogenated Phosphate etc.. APP also contains phosphorus and nitrogen, which can be used alone for flame retardant polyurethane (but not in good effect), but more often as an acid component of intumescent flame retardants for flame retardant polyurethanes. For example, a system consisting of 70% ethylene propylene rubber, 20%AAP, 8%, three triazine compounds and 2% other additives has a UL 94V-O flame retardant grade.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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