Weather-resistant and flame-retardant polypropylene composite material and preparation method thereof
A flame retardant polypropylene and composite material technology, applied in the field of weather-resistant flame-retardant polypropylene composite material and its preparation, can solve the problems of weather-resistant and flame-retardant, large amount of flame retardant, failure, etc., and achieve the change of mechanical properties. Small size, excellent weather resistance, simple processing effect
Active Publication Date: 2016-03-30
青岛海科模内装饰有限公司
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Problems solved by technology
[0010] The halogen-based flame-retardant and weather-resistant technologies disclosed in the above-mentioned patents all use ultraviolet absorbers and / or hindered amine light stabilizers, and have not yet solved the problem of high carbon black content (>1wt) when only carbon black is used as a weather-resistant modifier. %), how to prepare flame-retardant and weather-resistant polypropylene; and there are the following common deficiencies, which affect its use in various fields:
[0011] ① Ultraviolet absorbers and hindered amine light stabilizers are organic polar small molecules, which have saturation and volatilization problems with non-polar polypropylene resins, and under long-term ultraviolet rays, there are side reactions such as degradation and even failure problems.
[0012] ② Commonly used hindered amine light stabilizers will react with brominated flame retardants due to their high alkalinity, and there is a problem of confrontation between weathering agents and flame retardants
[0013] ③Compared with carbon black, UV absorbers and hindered amine light stabilizers are much more expensive
[0014] In addition, some of the above patented technologies, such as patents ZL201010022551.X, ZL200510059438.8, ZL200480002250.3 and patent CN102964673A, also have a large amount of flame retardants, which have a significant impact on the mechanical properties of the material, thus limiting the application range of flame-retardant and weather-resistant polypropylene
Method used
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[0029] A weather-resistant and flame-retardant polypropylene composite material, comprising 93-97wt% of polypropylene, 1-2wt% of a main flame retardant, 0.2-0.5wt% of a synergistic flame retardant, 0.1-0.5wt% of a chain breaker, and a foaming agent 0.1-0.5wt%, carbon black 1.5-2.5wt%, and 0.1-1wt% of other additives; the other additives are one or a combination of antioxidants, dispersants, and lubricants.
[0030] In the formulas of specific examples and comparative examples, the polypropylene used is the product of Yanshan Petrochemical Company, the model is PPT1701, the ethylene content is 2 o 3 ), is a product of Hunan Xikuangshan Flashing Star Antimony Industry Co., Ltd., with a purity of >98.5% and a particle size of 2000; the antioxidant 1010 is the product of Switzerland Ciba products.
[0031] The component contents of the formulations of Examples 1-9 of the weather-resistant flame-retardant polypropylene composite material and two comparative examples are shown in T...
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Abstract
The invention discloses a weather-resistant flame-retardant polypropylene composite material which is characterized by comprising 93-97wt% of polypropylene, 1-2wt% of main flame retardant, 0.2-0.5wt% of synergistic flame retardant, 0.1-0.5wt% of chain-cutting agent, 0.1-0.5wt% of foaming agent and 1.5-2wt% of carbon black, and further comprising 0.1-1wt% of other assistants, wherein the other assistants include one or more of antioxidant, dispersant and lubricant; and the carbon black is channel carbon black, and the particle size is 15-25nm. The invention also discloses a preparation method of the weather-resistant flame-retardant polypropylene composite material. According to the invention, the carbon black is selected as weather resistance modifier; the bromine-containing flame retardant, the synergistic flame retardant, the high-temperature chain-cutting agent and the high-temperature foaming agent are combined; the weather-resistant flame-retardant polypropylene composite material is prepared through melt blending; the weather resistance is excellent; the flame retardance is up to UL94V-0 level; the mechanical performance of the material changes little before and after modification; and the weather-resistant flame-retardant polypropylene composite material is low in raw materials and simple and easy to process.
Description
technical field [0001] The invention relates to a flame-retardant composite material and a preparation method thereof, in particular to a weather-resistant flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene has excellent mechanical properties, good heat resistance, high chemical stability, excellent electrical insulation, and good processability. It is a general-purpose plastic with excellent comprehensive properties. However, due to its saturated hydrocarbon structure and the existence of tertiary carbon atoms, polypropylene is extremely flammable and has poor weather resistance. [0003] Halogenated flame retardants are the most effective flame retardant additives for polyolefin materials with less addition, high flame retardant efficiency, and minimal impact on polymer properties. The commonly used varieties mainly include decabromodiphenylethane, hexabromocyclic Dodecane, octabromoether, octabro...
Claims
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IPC IPC(8): C08L23/12C08K13/02C08K3/04C08K5/02C08K5/06C08K5/11C08K5/3415C08K3/22C08K5/01
Inventor 李伟李超芹刘莉李荣勋孙立水丁乃秀
Owner 青岛海科模内装饰有限公司
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