News Details
Flame retardant precipitation
2017-10-17 11:46:12
Flame retardant precipitation
Flame retardant scale precipitation often produces mold in injection molding process not only effect the normal production, powder agglomeration and sticky mold, also often occur in parts finished product flame retardant precipitation, a white mist material impact product appearance and led to the decrease of the flame retardant, etc.
Before solving the problem of flame retardant precipitation, we discuss two important factors that affect the precipitation problem:
The compatibility between flame retardant and PP substrate resin
The flame retardant is generally in two types of PP resin: filling in the resin with similar filling form, and the other in the resin. Because PP is non-polar material, the polarity flame retardant and PP will have interface compatibility problems. The worse the interface compatibility, the more likely it is to produce a dialystic problem.
2. The influence of temperature on flame retardants
PP for semi crystalline material, have relatively low glass transition temperature, when the environment temperature is higher than the glass transition temperature, with the rise of temperature, the amorphous chain segment will accelerate the thermal motion, make small molecules with poor compatibility with PP resin flame retardant can easier to overcome the resistance to migrate to the surface.
Parts which is stored for a period of time after the surface reason sometimes also can appear the phenomenon of precipitation, precipitation and high temperature injection molding process is one of the most obvious process, often reflected in mold to produce the precipitation, scale, such as injection temperature, the higher the more powerful the precipitate. The relationship between the rate of flame retardant migration and temperature is roughly shown in figure 4. The precipitation rate of flame retardants is obviously accelerated with the increase of temperature. At constant temperature, precipitation is also associated with time.
After understanding of the cause of precipitation, the improvement of flame retardant precipitation can be twice the result. There are two main approaches:
1. Introduce strong polar groups (such as amines, carboxyl groups, epoxy groups, etc.) to enhance the effect of flame retardants and PP interface, and can effectively reduce the precipitation of flame retardants.
2. Improve the flame retardant and migration resistance of resin, reduce the migration rate of low molecular weight flame retardants: to reduce the temperature between chain segment motion or improve flame retardant molecular polymerization degree and lower molecular weight distribution width will become the effective measures for reducing flame retardant precipitation.
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.
It should be pointed out that the non-precipitated flame retardant PP is not completely absent, it only reduces the migration of flame retardants to a great extent. The current non-precipitation flame retardant PP is often based on high technical cost, so the low cost anti-precipitation is still a subject that the current flame retardant PP materials need to be perfected.
The flame retardant PP material is favored by more and more manufacturers because of its lightness, excellent weather resistance and low comprehensive price. It has successfully replaced flame retardant PS and flame retardant abs in many applications. In the wake of the rise of flame retardant PP materials, there is a problem that may often be encountered, which is the precipitation of flame retardant materials, which is more obvious in the halogen free flame retardant materials.
For flame retardant PA, the general requirements are to reach UL94 V- 0, mainly with additive flame retardants, such as decabromodiphenyl ether, brominated polystyrene (BPS), brominated epoxy resin (BER), etc. When choosing flame retardant, it is important to consider that the flame retardant should not be seepage from PA, so as not to cause the system to be resistant to light and material.
Added to improve the flame retardant agent of some of the shortcomings, has been synthesized some new phosphine oxide monomer containing active functional groups, such as three aryl phosphine oxide (TPO), and the nylon 66 salt and hexamethylenediamine copolymerization can be winner chain nylon 66 copolymer containing TPO. This type of flame retardant PA can play flame retardant performance in the condensed phase and gas phase. Since the flame retardant element becomes part of the flame retardant PA, it has lasting flame retardancy.
In addition, MCA (melamine cyanurate) is also used frequently in PA flame retardant treatment as additive flame retardant and red phosphorus complex, and it can obtain the ideal flame retardant effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Flame retardant scale precipitation often produces mold in injection molding process not only effect the normal production, powder agglomeration and sticky mold, also often occur in parts finished product flame retardant precipitation, a white mist material impact product appearance and led to the decrease of the flame retardant, etc.
Before solving the problem of flame retardant precipitation, we discuss two important factors that affect the precipitation problem:
The compatibility between flame retardant and PP substrate resin
The flame retardant is generally in two types of PP resin: filling in the resin with similar filling form, and the other in the resin. Because PP is non-polar material, the polarity flame retardant and PP will have interface compatibility problems. The worse the interface compatibility, the more likely it is to produce a dialystic problem.
2. The influence of temperature on flame retardants
PP for semi crystalline material, have relatively low glass transition temperature, when the environment temperature is higher than the glass transition temperature, with the rise of temperature, the amorphous chain segment will accelerate the thermal motion, make small molecules with poor compatibility with PP resin flame retardant can easier to overcome the resistance to migrate to the surface.
Parts which is stored for a period of time after the surface reason sometimes also can appear the phenomenon of precipitation, precipitation and high temperature injection molding process is one of the most obvious process, often reflected in mold to produce the precipitation, scale, such as injection temperature, the higher the more powerful the precipitate. The relationship between the rate of flame retardant migration and temperature is roughly shown in figure 4. The precipitation rate of flame retardants is obviously accelerated with the increase of temperature. At constant temperature, precipitation is also associated with time.
After understanding of the cause of precipitation, the improvement of flame retardant precipitation can be twice the result. There are two main approaches:
1. Introduce strong polar groups (such as amines, carboxyl groups, epoxy groups, etc.) to enhance the effect of flame retardants and PP interface, and can effectively reduce the precipitation of flame retardants.
2. Improve the flame retardant and migration resistance of resin, reduce the migration rate of low molecular weight flame retardants: to reduce the temperature between chain segment motion or improve flame retardant molecular polymerization degree and lower molecular weight distribution width will become the effective measures for reducing flame retardant precipitation.
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.
It should be pointed out that the non-precipitated flame retardant PP is not completely absent, it only reduces the migration of flame retardants to a great extent. The current non-precipitation flame retardant PP is often based on high technical cost, so the low cost anti-precipitation is still a subject that the current flame retardant PP materials need to be perfected.
The flame retardant PP material is favored by more and more manufacturers because of its lightness, excellent weather resistance and low comprehensive price. It has successfully replaced flame retardant PS and flame retardant abs in many applications. In the wake of the rise of flame retardant PP materials, there is a problem that may often be encountered, which is the precipitation of flame retardant materials, which is more obvious in the halogen free flame retardant materials.
For flame retardant PA, the general requirements are to reach UL94 V- 0, mainly with additive flame retardants, such as decabromodiphenyl ether, brominated polystyrene (BPS), brominated epoxy resin (BER), etc. When choosing flame retardant, it is important to consider that the flame retardant should not be seepage from PA, so as not to cause the system to be resistant to light and material.
Added to improve the flame retardant agent of some of the shortcomings, has been synthesized some new phosphine oxide monomer containing active functional groups, such as three aryl phosphine oxide (TPO), and the nylon 66 salt and hexamethylenediamine copolymerization can be winner chain nylon 66 copolymer containing TPO. This type of flame retardant PA can play flame retardant performance in the condensed phase and gas phase. Since the flame retardant element becomes part of the flame retardant PA, it has lasting flame retardancy.
In addition, MCA (melamine cyanurate) is also used frequently in PA flame retardant treatment as additive flame retardant and red phosphorus complex, and it can obtain the ideal flame retardant effect.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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