A kind of polypropylene composite material and preparation method thereof
A technology of composite materials and polypropylene, applied in the field of polypropylene composite materials and its preparation, can solve the problems of polypropylene thermal-oxidative aging performance, polypropylene material without color, operation complexity, etc., to achieve easy implementation of the preparation method, The effect of reduced dosage and simple preparation method
Active Publication Date: 2022-02-01
KINGFA SCI & TECH CO LTD
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Problems solved by technology
[0003] However, in the method disclosed in the above patent, the prepared polypropylene material has no color, and most of the interior and exterior materials used in automobiles and the functional parts around the engine are mainly black. Practice shows that the addition of the colorant carbon black Has a very significant effect on the thermal-oxidative aging properties of polypropylene
Secondly, commercial polypropylene products usually have nucleating agents added, and the nucleating agents added during the formulation optimization process generally have limitations in improving the crystal form of polypropylene.
Furthermore, the method of compounding antioxidants through intercalation agents has a certain degree of operational complexity in operation.
Method used
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Embodiment 1～5
[0029] The components of the polypropylene composite materials in Examples 1-5 are shown in Table 1. The preparation method of the polypropylene composite material of Examples 1-5 is as follows: mix each component in the polypropylene composite material uniformly by weight, then add it into a twin-screw extruder, carry out melt kneading, extrude and granulate, and obtain The polypropylene composite material; wherein, the melting and kneading temperature is 170-220° C., and the screw speed is 350-450 rpm.
[0030] In each embodiment, the preparation method of the non-oxidative modified carbon black treated with the surface modifier is as follows: the non-oxidative carbon black and the surface modifier are mixed and then sprayed and coated to obtain a surface wetted by the surface modifier. non-oxidative modified carbon black. During the preparation, the weight ratios of non-oxidizing carbon blacks and surface modifiers and their types are shown in Table 2.
[0031] After prep...
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Abstract
The invention relates to a polypropylene composite material and a preparation method thereof, belonging to the technical field of polymer materials. The polypropylene composite material of the present invention comprises the following components: 40-98 parts by weight of polypropylene, 0-25 parts by weight of toughening agent, 0-30 parts by weight of filler, non-oxidative modified carbon treated with surface modifier 0.5-3 parts by weight of black and additives; the specific surface area of the non-oxidative modified carbon black is not more than 170m 2 / g, the oil absorption value is not less than 70mL / 100g, and the high-temperature volatile content of the non-oxidative modified carbon black is lower than 0.3%; the auxiliary agent includes 0.1-0.6 parts by weight of antioxidant. By adopting the treated specific carbon black, the invention can effectively reduce the negative impact of the carbon black on the anti-thermal and oxidative aging performance of the polypropylene composite material, and at the same time reduce the amount of antioxidant in the product, reduce the cost and reduce the risk of antioxidant precipitation. The polypropylene composite material prepared by the invention satisfies the higher requirements of general automotive interior decorations for thermo-oxidative aging, and has the characteristics of stable thermo-oxidative aging resistance.
Description
technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] In order to improve the thermal and oxidative aging resistance of the material, Chinese patent CN102604209A uses a nucleating agent as a modified component. The nucleating agent can refine the polypropylene spherulites, make the crystals more uniform, regular, and increase the crystallinity, thereby effectively The lattice defects of the matrix are reduced, and oxygen is prevented from freely diffusing from the surface of the sample to the inside, thereby improving the thermal-oxidative aging resistance; CN102827422A makes polypropylene form a β-crystal form by adding a β-nucleating agent, and the addition of a grafting aid improves the The interfacial compatibility of polypropylene and inorganic fillers prevents the free diffusion of oxygen from the surface of the sample to t...
Claims
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IPC IPC(8): C08L23/14C08L53/02C08L23/08C08L23/16C08K13/06C08K9/06C08K3/04
CPCC08K3/04C08K9/06C08L23/14C08L2205/03C08L2201/08C08L53/025C08K13/06C08L23/0815C08L23/16
Inventor 卢朝亮黄险波叶南飚苏娟霞彭莉杨波罗忠富
Owner KINGFA SCI & TECH CO LTD