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Low-dielectricity composite thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and dielectric technology, which is applied in the field of low dielectric composite thermoplastic elastomer and its preparation, can solve the problems of low strength, high dielectric constant, and halogen in its natural color, and achieves good weather resistance and aging resistance. properties, strong dielectric stability, the effect of overcoming dielectric properties

Inactive Publication Date: 2021-01-08
江苏金陵奥普特高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although PVC material has many advantages, it also has defects such as poor heat resistance (heat distortion temperature of about 60°C), relatively high dielectric constant (3-4.8), relatively low strength, and natural color containing halogen.
In addition, thermoplastic materials commonly used in antenna housing materials include acrylonitrile-butadiene-styrene copolymer (ABS), graft copolymer of acrylic rubber, acrylonitrile and styrene (ASA), impact-resistant polystyrene Styrene (HIPS), high polymer polypropylene (PP) and other materials, ABS and PS materials have a dielectric constant of 2.8-3.0 and are cheap. Because their molecular structure contains unsaturated double bonds, they are not suitable for outdoor applications.
ASA has excellent weather resistance and is the material of choice for outdoor applications, but the dielectric constant of ASA is between 2.8-3.3, and the cost is high, which limits its large-scale use
PP material has a dielectric constant of about 2.2, low density and low cost, but its low strength and poor aging resistance also limit its use

Method used

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  • Low-dielectricity composite thermoplastic elastomer and preparation method thereof
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Examples

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Embodiment 1

[0044] A preparation method of a low-dielectric composite thermoplastic elastomer, the specific process is as follows:

[0045] a) Measured according to the weight ratio, first weigh 1 part of titanate coupling agent, put it into ethanol solution, stir and mix, adjust the pH to weak alkaline, make it hydrolyzed, then weigh and add 8 parts of glass fiber . The length of the glass fiber is 0.1-10 mm, the pH value is adjusted to 7-9, and then heated in a water bath to volatilize ethanol, and the pretreated glass fiber 1 is obtained after drying;

[0046] b), according to the weight ratio, first weigh 20 parts of hydrogenated styrene-butadiene block copolymers pre-filled with 10 parts of white oil and add them to the high-speed mixer, and the hydrogenated styrene-butadiene block copolymers The number average molecular weight of the product is 260,000, and its styrene content is 35%. Then 5 parts of atactic polypropylene with a melt flow rate of 16±3 were added. Add 0.2 parts of...

Embodiment 2

[0050] A preparation method of a low-dielectric composite thermoplastic elastomer, the specific process is as follows:

[0051] a) Measured according to the weight ratio, first weigh 1 part of titanate coupling agent, put it into ethanol solution, stir and mix, adjust the pH to weak alkaline, make it hydrolyzed, then weigh and add 8 parts of glass fiber . The length of the glass fiber is 0.1-10 mm, the pH value is adjusted to 7-9, and then heated in a water bath to volatilize the ethanol, and the pretreated glass fiber 2 is obtained after drying;

[0052] b), according to the weight ratio, first weigh 20 parts of hydrogenated styrene-butadiene block copolymers pre-filled with 10 parts of white oil and add them to the high-speed mixer, and the hydrogenated styrene-butadiene block copolymers The number average molecular weight of the product is 260,000, and its styrene content is 35%. Then 5 parts of atactic polypropylene with a melt flow rate of 16±3 were added. Add 0.2 part...

Embodiment 3

[0056] A preparation method of a low-dielectric composite thermoplastic elastomer, the specific process is as follows:

[0057] a) Measured according to the weight ratio, first weigh 1 part of titanate coupling agent, put it into ethanol solution, stir and mix, adjust the pH to weak alkaline, make it hydrolyzed, then weigh and add 8 parts of glass fiber . The length of the glass fiber is 0.1-10mm, the pH value is adjusted to 7-9, and then heated in a water bath to volatilize the ethanol, and the pretreated glass fiber 3 is obtained after drying;

[0058] b), according to the weight ratio, first weigh 20 parts of hydrogenated styrene-butadiene block copolymers pre-filled with 10 parts of white oil and add them to the high-speed mixer, and the hydrogenated styrene-butadiene block copolymers The number average molecular weight of the product is 260,000, and its styrene content is 35%. Then 5 parts of atactic polypropylene with a melt flow rate of 16±3 were added. Add 0.2 parts...

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Abstract

The invention discloses a low-dielectricity composite thermoplastic elastomer and a preparation method thereof. The low-dielectricity composite thermoplastic elastomer comprises the following components: a styrene block copolymer, non-polar rubber, polyolefin resin, maleic anhydride grafted non-polar rubber, maleic anhydride grafted polyolefin resin, polar rubber, a low-dielectricity medium, a coupling agent, a cross-linking agent, an assistant cross-linking agent, white oil and a processing aid. The thermoplastic elastomer has good mechanical properties on the premise of ensuring a low dielectric constant, has good weatherability and aging resistance, can keep material performances stable after long-term outdoor work, and has important significance for widening the application field of thermoplastic elastomers.

Description

Technical field: [0001] The invention relates to the technical field of thermoplastic elastomer materials, in particular to a low-dielectric composite thermoplastic elastomer and a preparation method thereof. Background technique: [0002] Thermoplastic elastomer is a high-performance material with a composite structure whose physical properties are between rubber and plastic. It has both the elasticity of rubber and the ease of processing of plastic. A new "industrial raw material system" has been formed, which is called "the third generation rubber". The elastomer prepared with ethylene-propylene rubber as the base material is called TPV (Thermoplastic Vulcanization), which is named after the dynamic vulcanization process makes the continuous phase and the dispersed phase in the system form a three-dimensional network-like sea-island structure. It has the physical properties and functional characteristics of thermosetting rubber at room temperature, and the high fluidity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L53/02C08L91/06C08L23/12C08L9/02C08L51/06C08L51/04C08K13/06C08K9/04C08K7/14
CPCC08L23/16C08L2201/02C08L2207/04C08L2205/035C08L2205/02C08K2201/004C08L2201/08C08L53/025C08L91/06C08L23/12C08L9/02C08L51/06C08L51/04C08K13/06C08K9/04C08K7/14
Inventor 吴佳骏刘星
Owner 江苏金陵奥普特高分子材料有限公司