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The formula design of the flame-retardant nylon
by：CSSSLD
2021-02-03
Phosphorus-containing compounds should not be mixed with organic silicon is used, the mixed use, reduce the oxygen index of flame retardant system.
Bromine flame retardants should not be used with zinc stearate, otherwise it will reduce bromine flame retarding effect.
Red phosphorus mixed with organic silicon is not suitable for use.
PA composition and flame retardant effect of flame retardant system, there is a close relationship between mechanical properties, PA, advocate complementary flame retardant, flame retardant system should include the finishing auxiliaries such as components, for different PA, different USES its composition is not the same.
So in the design of formula, should according to the properties of PA, such as melting point, structure, purpose, injection molding products processing performance requirements to allocate.
in phosphorus halide compound system, phosphorus-containing flame retardants mainly produce gas flame retardant effect, formed when burnt, phosphorus-containing flame retardant metaphosphate solid flame retardant effect, form a complete gas - both Flame retardant system. Halogen, phosphorus reaction between also can generate PX3, PX2 gas, this kind of gas density from HK, not easy to spread, surrounded by the flame surface, oxygen isolation effect. Halogen and ratio of phosphorus in the department of general for 3:2.
nitrogen flame retardant can promote phosphate compound carbide, namely into carbon, carbon layer covered by burning surface oxygen isolation effect, so as to improve the flame retardant effect. Phosphate and antimony series, its coordination mechanism basic similar to the halogen/antimony body. Also has a synergistic effect between polyphosphoric acid amide, etc. When adding carbon black, the amount of red phosphorus can be reduced. A lot of flame retardant combination can produce synergies, to improve the flame retardant effect. But some of the flame retardant mutual cooperation will cancel each other out when flame retardant effect. When using should pay close attention to.
PA nature deployment of choice is as follows: 1. Choose according to PA the melting point of varieties of flame retardant. 2. According to the purpose of the flame retardant PA choose varieties of flame retardant. 3. Choose according to flame retardant PA performance requirements related auxiliaries such as toughening agent, lubricant, etc. 4. In the manufacture of glass fiber reinforced flame retardant PA, can only choose halide phosphorus-containing flame retardants, nitrogen flame retarding agent should not be used alone to glass fiber reinforced flame retardant system. At the same time, the flame retardant dispersant is very important. 5. When making such as white light flame retardant PA, whiteness, purity of flame retardants have high requirements, flame retardant of impurities, especially has the oxidation of metal impurity, oxidizing reaction at high temperature will deepen the shade of the flame retardant system. 6. In flame retardant nylon formula, should also pay attention to add some dispersant, different flame retardant system of the use of different dispersants, its addition amount is different also.
flame retardant flame retardant and auxiliary accelerant. The main flame retardants are generally good flame retardant effect, give play to the role of the main flame retardant flame retardant; And the auxiliary flame retardants is effect is not ideal number cannot be used alone, with obvious effects when using flame retardant, auxiliary flame retardant smoke abatement, prevent drip, etc. The application of flame retardant synergistic effect. In a recipe, sometimes need to use several kinds of injection molding processing and flame retardant, when choosing flame retardant and tie-in combination, must know what kind of flame retardant combination have a complementary effect, which flame retardants are offset each other.
in the process of flame retardant nylon, flame retardant and its dosage, nylon resin performance and dosage, decentralized and extrusion process of flame retardants are main factors influencing the properties of flame retardant nylon. Flame retardants species and characteristics. Any bromide flame retardants for flame retardant nylon organic compound, phosphorus compounds, nitrogen compounds and inorganic compounds. The four types of flame retardants, bromine compounds flame retardant effect is very good.
more excellent articles: the whisker reinforced nylon and nylon, filling click directly.
http://www。 csssld。 cn//html/2016/Info_1012/369。 HTML
nantong on suye's official website: http://www. csssld。 cn//
in phosphorus halide compound system, phosphorus-containing flame retardants mainly produce gas flame retardant effect, formed when burnt, phosphorus-containing flame retardant metaphosphate solid flame retardant effect, form a complete gas - both Flame retardant system. Halogen, phosphorus reaction between also can generate PX3, PX2 gas, this kind of gas density from HK, not easy to spread, surrounded by the flame surface, oxygen isolation effect. Halogen and ratio of phosphorus in the department of general for 3:2.
nitrogen flame retardant can promote phosphate compound carbide, namely into carbon, carbon layer covered by burning surface oxygen isolation effect, so as to improve the flame retardant effect. Phosphate and antimony series, its coordination mechanism basic similar to the halogen/antimony body. Also has a synergistic effect between polyphosphoric acid amide, etc. When adding carbon black, the amount of red phosphorus can be reduced. A lot of flame retardant combination can produce synergies, to improve the flame retardant effect. But some of the flame retardant mutual cooperation will cancel each other out when flame retardant effect. When using should pay close attention to.
PA nature deployment of choice is as follows: 1. Choose according to PA the melting point of varieties of flame retardant. 2. According to the purpose of the flame retardant PA choose varieties of flame retardant. 3. Choose according to flame retardant PA performance requirements related auxiliaries such as toughening agent, lubricant, etc. 4. In the manufacture of glass fiber reinforced flame retardant PA, can only choose halide phosphorus-containing flame retardants, nitrogen flame retarding agent should not be used alone to glass fiber reinforced flame retardant system. At the same time, the flame retardant dispersant is very important. 5. When making such as white light flame retardant PA, whiteness, purity of flame retardants have high requirements, flame retardant of impurities, especially has the oxidation of metal impurity, oxidizing reaction at high temperature will deepen the shade of the flame retardant system. 6. In flame retardant nylon formula, should also pay attention to add some dispersant, different flame retardant system of the use of different dispersants, its addition amount is different also.
flame retardant flame retardant and auxiliary accelerant. The main flame retardants are generally good flame retardant effect, give play to the role of the main flame retardant flame retardant; And the auxiliary flame retardants is effect is not ideal number cannot be used alone, with obvious effects when using flame retardant, auxiliary flame retardant smoke abatement, prevent drip, etc. The application of flame retardant synergistic effect. In a recipe, sometimes need to use several kinds of injection molding processing and flame retardant, when choosing flame retardant and tie-in combination, must know what kind of flame retardant combination have a complementary effect, which flame retardants are offset each other.
in the process of flame retardant nylon, flame retardant and its dosage, nylon resin performance and dosage, decentralized and extrusion process of flame retardants are main factors influencing the properties of flame retardant nylon. Flame retardants species and characteristics. Any bromide flame retardants for flame retardant nylon organic compound, phosphorus compounds, nitrogen compounds and inorganic compounds. The four types of flame retardants, bromine compounds flame retardant effect is very good.
more excellent articles: the whisker reinforced nylon and nylon, filling click directly.
http://www。 csssld。 cn//html/2016/Info_1012/369。 HTML
nantong on suye's official website: http://www. csssld。 cn//
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