News Details
Halogen-free compound flame retardant of phenolic resin
2017-12-5 10:52:13
Halogen-free compound flame retardant of phenolic resin
With the development of science and technology, the application of polymer materials is becoming more and more extensive, and the amount of the materials is increasing rapidly, and the fire danger is increasing. Therefore, the research on flame retardant polymer materials has attracted wide attention in recent 20 years, and in many countries, fire-retardant materials and flame-retardant technologies have been adopted in some areas in the form of legislation.
In the past, brine / antimony flame retardant system was used to improve the flame retardancy of polymer materials, but the system caused two disasters and endangered people's life safety because of the large amount of smoke and halogen containing toxic and harmful gases during the combustion. Therefore, the research and development of the halogen-free compound flame retardant of phenolic resin has attracted much attention and gradually replaced the trend of halogen containing flame retardant materials.
The development of environment-friendly and halogen-free flame retardant materials in low smoke, in order to overcome the inorganic flame retardants added a large amount of material was caused by the excellent mechanical properties and processing performance, reduce the disadvantages of halogen-free flame retardant phenolic resin compound has become a frontier topic in the field of low smoke and non halogen flame retardant application research and development.
The literature description, phenolic resin can promote the formation of the characteristics of carbonization in combustion, so it can be with a phosphorus containing compound, nitrogen, boron compounds, silicon containing compounds and organic metal complexes, metal compounds in two or more than two kinds of compound into phenolic resin halogen-free flame retardant compound.
However, at present, the relative molecular mass (MW) of the phenol formaldehyde resin produced by many domestic enterprises is low, which is below 50000, and some are even only thousands. The relative low molecular weight phenolic resin melt viscosity and low melt viscosity as the matrix resin of the thermoplastic resin is large, so can not be uniformly dispersed in the matrix resin, resulting in poor performance of flame-retardant materials, especially caused by the mechanical properties of flame retardant materials greatly reduced, there is no practical value.
In order to solve this problem, the author selects high molecular weight thermoplastic phenolic resin and halogen-free flame retardant agent according to the proportion of phenolic resin and halogen-free flame retardants for polyolefin and styrene resin was applied to experiment, the results show that the compound flame retardant, the flame retardant material not only excellent flame retardant performance, no droplet, low smoke and flame retardant materials, the tensile strength is greater than that of non flame retardant resin material, and can keep the extension rate of flame retardant materials, the notched impact strength is basically unchanged or decreased little, it is worthy of popularization and application. The preparation and application test of this compound halogen free flame retardant are introduced.
Proportionally weighing the compound flame retardant and thermoplastic resin. When the temperature of the two roller mixer rises to the point above the resin melting point, first add the resin particles, melt it on the roller, then add the compound flame retardant, and mix it 10min at 180~220 C to produce the film. The mixing plate was preheated at 190~200 C at 5min, then pressed at 10min at 5MPA, and then pressed to make the sheet with thickness required. Finally, the sample was prepared.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
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.
The tensile properties of the performance test were tested by GB1046-92, the notch impact strength was tested by GB1843-93, and the combustion performance was tested by UL94.
The acid resistance of Mg (OH) 2 is poor. It dissolves rapidly in acid and is easily affected by lactic acid to leave the fingerprint on the surface of the product. In order to overcome the disadvantages of Mg (OH) 2 dispersion and poor compatibility, new varieties with good compatibility need to be developed. It can be used to improve crystal size and agglutination performance. It can also be used for surface treatment of unsaturated fatty acids, saturated fatty acids and excellent thermal conductivity components.
There are 6 kinds of fine particle grade Mg (OH) 2 with surface treatment level and 1 micron m to 2 mu m, and two Mg (OH) 2 with standard and fine particle size. There is a fibrous Mg (OH) 2, its diameter is 0.1 M to 0.5 m, and the length is 10 m to 50 m, which has the characteristics of high impact strength, high elongation, good appearance and transparency, and little wear to the forming machine.
PBT glass fiber reinforced halogen-free flame retardant HS-PNA-8 (instead of OP1240) product features: 1, this product is white powder phosphorus nitrogen flame retardant, high nitrogen and phosphorus content (P = 19%). 2, environmental protection halogen-free, meet the ROHS standard 3, high thermal stability (> 290 C), fully meet the requirements of 4, forming temperature, excellent flame retardant effect, adding 17-20% flame retardant, 25-30% glass fiber, can easily reach V0 (1.6MM), with CTl value (comparative tracking index) good electrical properties about 600V. 5. At the same time, a proper amount of modifier (such as antioxidant 1010) is added to improve the performance of the flame retardant polyester and meet the requirements of different use. 6. It has the advantages of low smoke and low density. 7, PET and PC can be used to produce PBT/PET and PBT/PC alloys.
PBT glass fiber reinforced halogen-free flame retardant HS-PNA-8 application proposal 1, after opening the package recommended as soon as possible, otherwise it is recommended to use 120 degrees before 2 hours. 2, it is suggested that pre drying resin before processing and drying for 4 hours at 120 degrees, make the moisture content in the resin must be less than 0.5%, preferably less than 0.1%, so as to prevent resin from color change due to hydrolysis at high temperature. 3, it is suggested that the middle section of the flame retardant be added to the residual water in the resin as far as possible. 4, to ensure the full dispersion of the flame retardant and maintain a certain degree of vacuum. 5, the halogen flame retardant can not be used in the use, so as to prevent the product from changing color. 6, the flame retardant is most suitable for the shorter screw length / diameter ratio (e.g. L/D =32 or L/D =36), and the equipment with less shear force (shear block angle 30 degree or 45 degree) can make the product have better mechanical performance and good appearance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
With the development of science and technology, the application of polymer materials is becoming more and more extensive, and the amount of the materials is increasing rapidly, and the fire danger is increasing. Therefore, the research on flame retardant polymer materials has attracted wide attention in recent 20 years, and in many countries, fire-retardant materials and flame-retardant technologies have been adopted in some areas in the form of legislation.
In the past, brine / antimony flame retardant system was used to improve the flame retardancy of polymer materials, but the system caused two disasters and endangered people's life safety because of the large amount of smoke and halogen containing toxic and harmful gases during the combustion. Therefore, the research and development of the halogen-free compound flame retardant of phenolic resin has attracted much attention and gradually replaced the trend of halogen containing flame retardant materials.
The development of environment-friendly and halogen-free flame retardant materials in low smoke, in order to overcome the inorganic flame retardants added a large amount of material was caused by the excellent mechanical properties and processing performance, reduce the disadvantages of halogen-free flame retardant phenolic resin compound has become a frontier topic in the field of low smoke and non halogen flame retardant application research and development.
The literature description, phenolic resin can promote the formation of the characteristics of carbonization in combustion, so it can be with a phosphorus containing compound, nitrogen, boron compounds, silicon containing compounds and organic metal complexes, metal compounds in two or more than two kinds of compound into phenolic resin halogen-free flame retardant compound.
However, at present, the relative molecular mass (MW) of the phenol formaldehyde resin produced by many domestic enterprises is low, which is below 50000, and some are even only thousands. The relative low molecular weight phenolic resin melt viscosity and low melt viscosity as the matrix resin of the thermoplastic resin is large, so can not be uniformly dispersed in the matrix resin, resulting in poor performance of flame-retardant materials, especially caused by the mechanical properties of flame retardant materials greatly reduced, there is no practical value.
In order to solve this problem, the author selects high molecular weight thermoplastic phenolic resin and halogen-free flame retardant agent according to the proportion of phenolic resin and halogen-free flame retardants for polyolefin and styrene resin was applied to experiment, the results show that the compound flame retardant, the flame retardant material not only excellent flame retardant performance, no droplet, low smoke and flame retardant materials, the tensile strength is greater than that of non flame retardant resin material, and can keep the extension rate of flame retardant materials, the notched impact strength is basically unchanged or decreased little, it is worthy of popularization and application. The preparation and application test of this compound halogen free flame retardant are introduced.
Proportionally weighing the compound flame retardant and thermoplastic resin. When the temperature of the two roller mixer rises to the point above the resin melting point, first add the resin particles, melt it on the roller, then add the compound flame retardant, and mix it 10min at 180~220 C to produce the film. The mixing plate was preheated at 190~200 C at 5min, then pressed at 10min at 5MPA, and then pressed to make the sheet with thickness required. Finally, the sample was prepared.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
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.
The tensile properties of the performance test were tested by GB1046-92, the notch impact strength was tested by GB1843-93, and the combustion performance was tested by UL94.
The acid resistance of Mg (OH) 2 is poor. It dissolves rapidly in acid and is easily affected by lactic acid to leave the fingerprint on the surface of the product. In order to overcome the disadvantages of Mg (OH) 2 dispersion and poor compatibility, new varieties with good compatibility need to be developed. It can be used to improve crystal size and agglutination performance. It can also be used for surface treatment of unsaturated fatty acids, saturated fatty acids and excellent thermal conductivity components.
There are 6 kinds of fine particle grade Mg (OH) 2 with surface treatment level and 1 micron m to 2 mu m, and two Mg (OH) 2 with standard and fine particle size. There is a fibrous Mg (OH) 2, its diameter is 0.1 M to 0.5 m, and the length is 10 m to 50 m, which has the characteristics of high impact strength, high elongation, good appearance and transparency, and little wear to the forming machine.
PBT glass fiber reinforced halogen-free flame retardant HS-PNA-8 (instead of OP1240) product features: 1, this product is white powder phosphorus nitrogen flame retardant, high nitrogen and phosphorus content (P = 19%). 2, environmental protection halogen-free, meet the ROHS standard 3, high thermal stability (> 290 C), fully meet the requirements of 4, forming temperature, excellent flame retardant effect, adding 17-20% flame retardant, 25-30% glass fiber, can easily reach V0 (1.6MM), with CTl value (comparative tracking index) good electrical properties about 600V. 5. At the same time, a proper amount of modifier (such as antioxidant 1010) is added to improve the performance of the flame retardant polyester and meet the requirements of different use. 6. It has the advantages of low smoke and low density. 7, PET and PC can be used to produce PBT/PET and PBT/PC alloys.
PBT glass fiber reinforced halogen-free flame retardant HS-PNA-8 application proposal 1, after opening the package recommended as soon as possible, otherwise it is recommended to use 120 degrees before 2 hours. 2, it is suggested that pre drying resin before processing and drying for 4 hours at 120 degrees, make the moisture content in the resin must be less than 0.5%, preferably less than 0.1%, so as to prevent resin from color change due to hydrolysis at high temperature. 3, it is suggested that the middle section of the flame retardant be added to the residual water in the resin as far as possible. 4, to ensure the full dispersion of the flame retardant and maintain a certain degree of vacuum. 5, the halogen flame retardant can not be used in the use, so as to prevent the product from changing color. 6, the flame retardant is most suitable for the shorter screw length / diameter ratio (e.g. L/D =32 or L/D =36), and the equipment with less shear force (shear block angle 30 degree or 45 degree) can make the product have better mechanical performance and good appearance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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