News Details
Silicone rubber flame retardant
2017-9-18 17:41:12
Silicone rubber flame retardant
Silicon rubber has excellent comprehensive technical performance. But its fundamental drawback is that it is less flammable. Although silicon rubber burning mineral generation is given priority to with silica residue, so sometimes can be used in manufacturing the combustion conditions of products, improve the flame resistance of silicone rubber is very pressing issue.
At present, the most extensive and effective way to reduce polymer combustion is to use a variety of silicone rubber flame retardants that can slow or inhibit the combustion process. It is well known that for rubber, the practical silicone rubber flame retardants are still chlorinated or brominated compounds. But they produce a lot of smoke during combustion and produce toxic and corrosive products.
Therefore, the use of such silicone rubber flame retardants is increasingly restricted. This paper studies the contain of halide powder flame retardant methyl vinyl silicone rubber С К Т В performance. The flame retardants include aluminum hydroxide, zinc borate, antimony trioxide, magnesium hydroxide, ammonium polyphosphate and cyanate.
The silicone rubber flame retardant can be added to the machine to add 30 ~ 100 parts to 100 pieces of raw glue. In the rubber vulcanizing press under 170 ° C vulcanization 10 min. Flame retardant effect of efficiency available leave vulcanizates flame extinguished the time to evaluate (the former Soviet union standard Г О С Т - 28157-28157 and 28779-90). The researchers measured the technical performance of the adhesive, such as the determination of meni viscosity on the Monsanto rheometer. The mechanical properties of rubber were also determined.
The experiment shows that the amount of zinc borate in silicone rubber is less than 15 parts, or the gel will harden. In this dosage, it has no flame retardant effect. The use of zinc borate and antimony trioxide and the rubber containing them are not flammable. The flame retardant effect of magnesium hydroxide in silicone rubber is not obvious, which may be due to the inconsistency of the initial temperature of the rapid decomposition of vulcanized glue and packing dehydration. Add 30 ~ 100 flame retardants to the vulcanized rubber and it will still burn and spark.
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
For silicon rubber С К Т В vulcanizates, but fine dispersion of aluminum hydroxide Al (OH) 3 is the most effective flame retardant. Adding Al (OH) 3 reduces the amount of flammable components in the gelatine and cools the reaction area due to the heat absorption and thermal conduction of the non-combustible materials generated during decomposition.
Has approved the following brand of Al (OH) 3 (such as MartinalOL - 104 and OL - 107, Apyral40VSI and 60 vis, Г и д р о seem с а л kind guide and С seem а р - Л е т 104, etc.). The results showed that when the flame was removed from the vulcanized gel, the extinguishing time was approximately the same as that of all the fillers (under the same amount). However, the process performance and comprehensive mechanical properties of Al (OH) 3Apyral40VSI made of ethylene silane were added.
It appears that the modified filler can be better distributed in silicone rubber, thus improving the mechanical properties of the vulcanized rubber. Studied the effect on the properties of silicone rubber flame retardant containing phosphorus compounds and found that the effect of phosphorous flame retardants are non-volatile with phosphorus compounds (mainly P2O5) in the rubber surface protective layer generated on the glassy state. The protective layer blocks heat from the flame to the polymer and prevents the pyrolysis of the pyrolysis from spreading to the burning zone.
Experiments confirmed that phosphorus flame retardants (NH4PO3) n oligomer than single phosphate (such as tricresol phosphate, ammonium phosphate, etc.) and silicone rubber С К Т В has a better compatibility, less spray frost, and has good resistance to high temperature performance. In the experiment, ammonium polyphosphate jsl-app-101r modified by melamine was used. This is because phosphor compounds and nitrogen compounds have high flame retardant properties.
It is well known that melamine cyanurate has high flame retardancy. The vulcanized rubber containing such flame retardants will grow in flame and cause the flame to stop spreading. It is also possible that the flame retardants release a large amount of inert volatiles at the temperature of decomposition, preventing the combustion of gases that are decomposed from the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Silicon rubber has excellent comprehensive technical performance. But its fundamental drawback is that it is less flammable. Although silicon rubber burning mineral generation is given priority to with silica residue, so sometimes can be used in manufacturing the combustion conditions of products, improve the flame resistance of silicone rubber is very pressing issue.
At present, the most extensive and effective way to reduce polymer combustion is to use a variety of silicone rubber flame retardants that can slow or inhibit the combustion process. It is well known that for rubber, the practical silicone rubber flame retardants are still chlorinated or brominated compounds. But they produce a lot of smoke during combustion and produce toxic and corrosive products.
Therefore, the use of such silicone rubber flame retardants is increasingly restricted. This paper studies the contain of halide powder flame retardant methyl vinyl silicone rubber С К Т В performance. The flame retardants include aluminum hydroxide, zinc borate, antimony trioxide, magnesium hydroxide, ammonium polyphosphate and cyanate.
The silicone rubber flame retardant can be added to the machine to add 30 ~ 100 parts to 100 pieces of raw glue. In the rubber vulcanizing press under 170 ° C vulcanization 10 min. Flame retardant effect of efficiency available leave vulcanizates flame extinguished the time to evaluate (the former Soviet union standard Г О С Т - 28157-28157 and 28779-90). The researchers measured the technical performance of the adhesive, such as the determination of meni viscosity on the Monsanto rheometer. The mechanical properties of rubber were also determined.
The experiment shows that the amount of zinc borate in silicone rubber is less than 15 parts, or the gel will harden. In this dosage, it has no flame retardant effect. The use of zinc borate and antimony trioxide and the rubber containing them are not flammable. The flame retardant effect of magnesium hydroxide in silicone rubber is not obvious, which may be due to the inconsistency of the initial temperature of the rapid decomposition of vulcanized glue and packing dehydration. Add 30 ~ 100 flame retardants to the vulcanized rubber and it will still burn and spark.
Cresyl Diphenyl Phosphate(CDP) Use
This Product Is Flame Retardant Plasticizer, And Resin Compatibility, For Polyvinyl Acetal, Nitrocellulose, Polyvinyl Chloride, Natural Rubber And Synthetic Rubber; Can Also Be Used For Synthetic Lubricants And Hydraulic Oil; Substitutes For Triphenyl Phosphate. Applicable To Polyvinyl Chloride, Vinyl Chloride Copolymer, Polyvinyl Acetal, Nitrocellulose, Ethyl Cellulose, Cellulose Acetate Butyrate And So On.
For silicon rubber С К Т В vulcanizates, but fine dispersion of aluminum hydroxide Al (OH) 3 is the most effective flame retardant. Adding Al (OH) 3 reduces the amount of flammable components in the gelatine and cools the reaction area due to the heat absorption and thermal conduction of the non-combustible materials generated during decomposition.
Has approved the following brand of Al (OH) 3 (such as MartinalOL - 104 and OL - 107, Apyral40VSI and 60 vis, Г и д р о seem с а л kind guide and С seem а р - Л е т 104, etc.). The results showed that when the flame was removed from the vulcanized gel, the extinguishing time was approximately the same as that of all the fillers (under the same amount). However, the process performance and comprehensive mechanical properties of Al (OH) 3Apyral40VSI made of ethylene silane were added.
It appears that the modified filler can be better distributed in silicone rubber, thus improving the mechanical properties of the vulcanized rubber. Studied the effect on the properties of silicone rubber flame retardant containing phosphorus compounds and found that the effect of phosphorous flame retardants are non-volatile with phosphorus compounds (mainly P2O5) in the rubber surface protective layer generated on the glassy state. The protective layer blocks heat from the flame to the polymer and prevents the pyrolysis of the pyrolysis from spreading to the burning zone.
Experiments confirmed that phosphorus flame retardants (NH4PO3) n oligomer than single phosphate (such as tricresol phosphate, ammonium phosphate, etc.) and silicone rubber С К Т В has a better compatibility, less spray frost, and has good resistance to high temperature performance. In the experiment, ammonium polyphosphate jsl-app-101r modified by melamine was used. This is because phosphor compounds and nitrogen compounds have high flame retardant properties.
It is well known that melamine cyanurate has high flame retardancy. The vulcanized rubber containing such flame retardants will grow in flame and cause the flame to stop spreading. It is also possible that the flame retardants release a large amount of inert volatiles at the temperature of decomposition, preventing the combustion of gases that are decomposed from the material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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