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ASA resin suitable for automobile millimeter-wave radar and preparation method thereof

An ASA resin and millimeter wave radar technology, which is applied in the field of polymer molding and polymer blending, can solve the problems of ASA toughness, millimeter wave radar signal interference, and the inability to meet the toughness requirements of automotive exterior materials. The effect of maintaining weather resistance and impact toughness, and the method is simple and easy to implement

Active Publication Date: 2020-11-03
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 201010265169.1 reports a highly weather-resistant acrylic resin and its preparation method. Although this material can meet the basic requirements for materials for automotive exterior parts, it cannot effectively reduce the dielectric constant of ASA. The related automotive exteriors prepared by it Components May Interfere with Automotive mmWave Radar Signals
Chinese patent 201710706302.4 reports a high-transmittance ASA resin mixture and its radome, which successfully reduces the dielectric constant of the ASA resin by adding glass beads to the ASA resin and improves the radar wave transmission. However, since glass microspheres are inorganic fillers, they have a significant impact on the toughness of ASA, which cannot meet the toughness requirements of automotive exterior parts.

Method used

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  • ASA resin suitable for automobile millimeter-wave radar and preparation method thereof
  • ASA resin suitable for automobile millimeter-wave radar and preparation method thereof
  • ASA resin suitable for automobile millimeter-wave radar and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0029] Embodiments 1 to 5 relate to ASA resins suitable for automotive millimeter-wave radars. The components and contents of the ASA resin materials are shown in Table 1; the SAN resin is Chimei PN128 from Taiwan, and the ASA rubber powder is Kumho XC500 from South Korea. The inorganic hybrid resin is POSS, wherein the top segment of the POSS cage molecule is a methyl acrylate polymer segment (Wang Wenping, ATRP preparation and characterization of POSS / PMMA composite materials, Polymer Materials Science and Engineering [J], 2007 , 23 (4): 247-249), antioxidant is the Irganox 168 of Ciba Company; Lubricant is commercially available N, N-ethylene bisstearic acid amide, and weathering agent is hindered amine antioxidant (Ciba , 770DF).

[0030] Table 1 Components and parts by weight

[0031] Example 1 Example 2 Example 3 Example 4 Example 5 SAN resin 62 62 62 62 62 ASA rubber powder 35 33 31 28 23 Organic-inorganic hybrid resin 3 5...

Embodiment 6

[0037] This embodiment relates to an ASA suitable for automobile millimeter-wave radar, and its preparation method is as follows:

[0038] a. Take the corresponding raw materials according to the following components and weight:

[0039]

[0040] b. Then first mix SAN resin, ASA rubber powder, organic-inorganic hybrid resin, antioxidant, lubricant, and weather resistance agent in a mixing mixer;

[0041] c. Blend and granulate the mixture obtained in step b through a twin-screw extruder to obtain ASA resin particles suitable for automotive millimeter-wave radar. The barrel temperature of the extruder is 190° C., and the screw speed is 700 rpm.

[0042] The SAN resin has a weight-average molecular weight of 120,000 and a glass transition temperature of 104°C;

[0043] The ASA rubber powder, the acrylate rubber content is 55%, and the rubber particle size is 200nm;

[0044] Described organic-inorganic hybrid particle is POSS, and wherein, POSS cage molecule top segment is p...

Embodiment 7

[0049] This embodiment relates to an ASA suitable for automobile millimeter-wave radar, and its preparation method is the same as that of Embodiment 6, except that:

[0050]a. Prepare materials according to the following components and parts by weight:

[0051]

[0052] b. Then first mix SAN resin, ASA rubber powder, organic-inorganic hybrid resin, antioxidant, lubricant, and weather resistance agent in a mixing mixer;

[0053] c. Blend and granulate the mixture obtained in step b through a twin-screw extruder to obtain ASA resin particles suitable for automotive millimeter-wave radar. The barrel temperature of the extruder is 250° C., and the screw speed is 300 rpm.

[0054] The SAN resin has a molecular weight of 150,000 and a glass transition temperature of 105.5°C;

[0055] The ASA rubber powder, the acrylate rubber content is 53%, and the rubber particle size is 300nm;

[0056] Described organic-inorganic hybrid particle is POSS, and R is styrene-acrylonitrile copoly...

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Abstract

The invention relates to ASA resin suitable for an automobile millimeter-wave radar and a preparation method of the ASA resin. The ASA resin comprises the following components in parts by weight: 45-70 parts of styrene-acrylonitrile (SAN) copolymer, 25-40 parts of acrylate styrene-acrylonitrile rubber powder (ASA) powder, 3-15 parts of organic-inorganic hybrid resin, 0.1-1 part of antioxidant, 0.1-1 part of lubricant and 0.4-1 part of weather-resistant agent. The preparation method comprises the following steps: adding all the components into a mixing stirrer for mixing the components; and feeding the obtained mixture into a twin-screw extruder through a weightless feeding machine, and carrying out blending granulation to obtain the ASA resin suitable for the automobile millimeter-wave radar. By introducing the organic-inorganic hybrid resin, the dielectric constant of the ASA resin can be effectively reduced, millimeter wave radar wave absorption of the material can be effectively reduced, and meanwhile, the obtained ASA resin can keep good impact toughness and weather resistance and is suitable for automobile exterior trimming parts.

Description

technical field [0001] The invention belongs to the field of polymer blending and polymer molding processing, and relates to an ASA resin suitable for automobile millimeter-wave radar and a preparation method thereof; in particular, it relates to an ASA resin with low dielectric constant, high weather resistance and impact toughness ASA resin suitable for automotive millimeter wave radar and preparation method thereof. Background technique [0002] In recent years, with the improvement of automobiles' requirements for intelligent driving, safety and collision avoidance, millimeter-wave radar has become one of the sensors in the design of intelligent automobiles. Requirements, if the dielectric constant of the material is high, there may be a risk of the signal being weakened when the radar wave passes through the material. The dielectric constant of ordinary ASA is generally 3.2-3.4, which may have a certain impact on radar wave penetration. On the other hand, as a long-te...

Claims

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Application Information

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IPC IPC(8): C08L25/12C08L51/04C08L53/00
CPCC08L25/12C08L2205/025C08L2205/03C08L51/04C08L53/00
Inventor 鲁加荣周中玉周霆
Owner SHANGHAI KUMHO SUNNY PLASTICS
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