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Polypropylene composite material with low dielectric constant and high weather resistance and preparation method thereof

A low dielectric constant and composite material technology, applied in the field of polymer materials, can solve the problems of unimproved polypropylene dielectric properties and weather resistance, and achieve high strength, low dielectric constant, and high weather resistance.

Pending Publication Date: 2021-11-30
JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process is simple, effectively enhances the rigidity of polypropylene, and the obtained material has higher strength, but does not improve the dielectric properties of polypropylene, nor does it improve weather resistance

Method used

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  • Polypropylene composite material with low dielectric constant and high weather resistance and preparation method thereof
  • Polypropylene composite material with low dielectric constant and high weather resistance and preparation method thereof
  • Polypropylene composite material with low dielectric constant and high weather resistance and preparation method thereof

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preparation example Construction

[0025] The invention provides a method for preparing a low-dielectric constant high-weather-resistant polypropylene composite material, comprising the following steps: S100, weighing polypropylene resin, liquid crystal polymer, compatibilizer, antioxidant, PTFE micropowder and weather-resistant Auxiliaries, added to a high-speed mixer and mixed for (5-10) min, so that the raw material components are dispersed and mixed uniformly to obtain a mixture M; S200, adding the mixture M to the twin-screw extruder through the main feed, said Hollow glass microspheres are fed into the twin-screw extruder through side feeding, and the temperature of each zone of the twin-screw extruder is from 1 to 10 zones in sequence from 160°C to 190°C, 190°C to 220°C, and 220°C to 240°C. ℃, 230℃~250℃, 230℃~250℃, 230℃~250℃, 230℃~250℃, 230℃~250℃, 230℃~250℃, 230℃~250℃, the head temperature is 230℃ ~250°C, the screw length-to-diameter ratio of the twin-screw extruder is 30-48, the screw speed is (300-500)...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a polypropylene composite material with low dielectric constant and high weather resistance and a preparation method thereof. The polypropylene composite material comprises the following components: polypropylene resin, a liquid crystal polymer, a compatilizer, hollow glass beads, PTFE micro powder, an antioxidant and a weather-proof auxiliary agent. The ratio of the polypropylene resin to the liquid crystal polymer to the hollow glass beads to the PTFE micro powder in parts by weight is (65-85): (5-10): (8-20): (0.1-0.3). The weather-proof auxiliary agent is a light stabilizer. The ratio of the antioxidant to the weather-proof auxiliary agent in parts by weight is (0.4-0.8): (0.1-0.3). The polypropylene composite material with low dielectric constant and high weather resistance provided by the invention has excellent properties such as high strength, high weather resistance and low dielectric constant, and can meet market application requirements. The material is very suitable for 5G products, especially for 5G base station radomes and other products.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polypropylene composite material with low dielectric constant and high weather resistance and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a thermoplastic synthetic material with excellent properties, which is widely used in automobiles, home appliances, food packaging and medical and health fields. In order to strengthen the mechanical strength of PP, the existing technology often modifies it by adding polar substances to generate PP alloys with a wider range of application. However, the modification of polar substances will lead to a significant increase in the dielectric constant of the alloy material, which cannot meet the requirements. The needs of industries that require low dielectric materials, such as the 5G communication industry and other industries. [0003] Liquid crystal polymer is a new type of special engineering p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L27/18C08L51/06C08L101/12C08K7/28
CPCC08L23/12C08L2205/08C08L2201/08C08L27/18C08L51/06C08L101/12C08K7/28
Inventor 王清文杨杰刁雪峰申应军刘曙光
Owner JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD