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A kind of composite flame retardant and its preparation method and application
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A compound flame retardant and flame retardant technology, applied in the field of flame retardants, can solve the problems of environmental damage, complex processing technology, poor compatibility, etc., and achieve improved flame retardant effect, good flame retardant effect, and good compatibility. Effect
Active Publication Date: 2017-08-18
吉林省交通规划设计院
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However, its processing technology is complex and requires its equipment; more importantly, the use of halogenated flame retardants will cause great damage to the environment, and some fields have been banned or restricted in the world; and halogen-free flame retardants and The compatibility of asphalt mixture is poor, and segregation is easy to occur, which affects the flame retardant effect of flame retardant on asphalt mixture and the various properties of asphalt mixture itself.
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[0040] The present invention also provides a preparation method of the composite flame retardant described in the technical solution, comprising the following steps:
[0041] a) After mixing the nano-inorganic flame retardant, phosphorus flame retardant, smoke suppressant and surface modifier, react to obtain a composite flame retardant;
[0042] The nano inorganic flame retardant is nano aluminum hydroxide or nano magnesium hydroxide.
[0043]In the present invention, the nano inorganic flame retardant, phosphorus flame retardant, smoke suppressant and surface modifier are mixed. In the present invention, the nano inorganic flame retardant, as the main component of the composite flame retardant, plays a leading role in the flame retardant effect. In the present invention, the nano inorganic flame retardant is nano aluminum hydroxide or nano magnesium hydroxide. The present invention has no special limitation on the source of the nano-inorganic flame retardant, and the above...
Embodiment 1
[0062] (1) Stir 75kg of nano-magnesium hydroxide with a particle size of 10nm to 50nm, 20kg of microencapsulated red phosphorus and 5kg of silica at 25°C for 15 minutes until uniform, to obtain a mixed powder.
[0063] (2) Add 0.3 kg of titanate coupling agent to the above mixed powder, react under stirring conditions, the reaction temperature is 50°C, and the reaction time is 40 minutes to obtain a composite flame retardant, which is cooled and sealed for packaging to obtain the product.
Embodiment 2
[0065] (1) Stir 70kg of nano-aluminum hydroxide with a particle size of 10nm to 50nm, 20kg of ammonium polyphosphate and 10kg of ferrocene at 25°C for 15min until uniform to obtain a mixed powder.
[0066] (2) Add 0.3 kg of silane coupling agent to the above mixed powder, react under stirring conditions, the reaction temperature is 40° C., and the reaction time is 40 minutes to obtain a composite flame retardant, which is cooled and sealed for packaging to obtain the product.
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Abstract
The invention provides a composite flame retardant and a preparation method and application thereof. The composite flame retardant is prepared from, by weight, 40-85 parts of nano organic flame retardant, 10-45 parts of phosphorus-based flame retardant, 3-15 parts of smoke suppressor and 0.2-0.4 part of surface modification agent, wherein the nano organic flame retardant adopts nano-aluminum hydroxide or nano-magnesium hydroxide. Compared with the prior art, the composite flame retardant has good compatibility with an asphalt mixture and is easy to disperse, the flame-retardant effect of the asphalt mixture is improved, and meanwhile various properties such as the mechanical property, the weather resistance and the heat deformation temperature of the asphalt mixture are not reduced. The obtained asphalt mixture modified by the composite flame retardant is good in flame-retardant effect and meets various requirements of a highway asphalt mixture.
Description
technical field [0001] The invention relates to the technical field of flame retardants, more specifically, to a composite flame retardant and its preparation method and application. Background technique [0002] Flame retardant science and technology is a science developed to meet the needs of social safety in production and life, prevent fires, and protect people's lives and property. Flame retardant is the application of flame retardant technology in real life. According to the presence or absence of halogen in flame retardants, it is divided into halogen flame retardants and halogen-free flame retardants. Special chemical additives, widely used in flame retardant processing of various materials. Materials processed with flame retardants can effectively prevent, delay or terminate the spread of flames when attacked by external fire sources, so as to achieve the effect of flame retardancy. [0003] At present, the application of flame retardants in asphalt mixtures has a...
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