Antistatic dynamic vulcanized silicone rubber thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and dynamic vulcanization technology, applied in the field of elastomer materials, can solve problems such as easy agglomeration, material performance degradation, and poor compatibility of matrix materials, so as to improve antistatic performance, improve compatibility, and avoid stress defects. Effect

Pending Publication Date: 2022-02-01
中广核三角洲(江苏)塑化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN109517367A prepared conductive thermoplastic dynamic vulcanized silicone rubber by adding conductive fillers. Part of the conductive fillers are metal powders, which improves the conductivity and brings the disadvantage of high density and softness to the material. In addition, the surface of the fillers has not been modified. It has poor compatibility with the matrix material and is prone to agglomeration, resulting in a decrease in material performance

Method used

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  • Antistatic dynamic vulcanized silicone rubber thermoplastic elastomer and preparation method thereof
  • Antistatic dynamic vulcanized silicone rubber thermoplastic elastomer and preparation method thereof

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Embodiment 1~6

[0058] Surface modification of carbon-based antistatic fillers: place graphite or graphene in toluene solvent and ultrasonically disperse at room temperature for 30 minutes, wherein the weight ratio of carbon-based antistatic fillers to toluene is 1:15 to obtain carbon-based antistatic fillers Dispersion liquid; Then heat up to 80°C and use the silane coupling agent γ-aminopropyltrimethoxysilane KH-550 whose mass is 2 times that of graphite or graphene and the catalyst triethylamine whose mass is 1 / 5 of graphite or graphene Add amine dropwise to the dispersion liquid, stir and react at 80°C for 12 hours, then filter with suction, wash (wash with a mixture of toluene and ethanol), and dry (80°C, 10 hours) to obtain modified graphite or graphene Antistatic filler.

[0059] Table 1 is the raw material composition formula (unit: parts by weight) of each embodiment and each comparative example

[0060]

[0061] Preparation methods include:

[0062] Step 1. Pre-mixing of rubber...

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Abstract

The invention discloses an antistatic dynamic vulcanized silicone rubber thermoplastic elastomer and a preparation method thereof. The antistatic dynamic vulcanized silicone rubber thermoplastic elastomer comprises the following raw materials: 20-80 parts of silicone rubber, 20-80 parts of thermoplastic polyurethane, 1-5 parts of antistatic filler, 1-10 parts of a compatibilizer, 0.1-5 parts of an antioxidant, 0.1-5 parts of a cross-linking agent and 0.01-2 parts of a first catalyst. The surface modified carbon series antistatic filler is used as the antistatic additive, the compatibility of the filler and a matrix polymer is improved, and the carbon series conductive filler is mixed into a blend matrix by adopting a pre-dispersion method so that the effects of uniform dispersion and stable performance are achieved. The silicone rubber thermoplastic elastomer prepared by the method has excellent antistatic property, excellent mechanical property and repeatable processability, is smooth in surface and suitable for being in contact with skin, and is a green and environment-friendly material for wearable electronic products.

Description

technical field [0001] The invention relates to the field of elastomer materials, in particular to an antistatic dynamic vulcanized silicone rubber thermoplastic elastomer and a preparation method thereof. Background technique [0002] Dynamically vulcanized thermoplastic elastomers are melt-blended rubber and plastic under high-temperature and high-shear conditions. By adding a rubber cross-linking agent, the rubber phase will undergo cross-linking reactions during the mixing process, and the cross-linked rubber under shear will continue to It is broken and dispersed in the plastic phase, and finally forms a "sea-island" structure with the crosslinked rubber as the dispersed phase and the plastic phase as the continuous phase. Compared with traditional thermosetting rubber, dynamically vulcanized thermoplastic elastomer has both the high elasticity of rubber and the thermoplasticity of plastic, and is a recyclable and environmentally friendly material. [0003] Silicone ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L83/07C08K3/04C08K9/06
CPCC08L75/06C08L75/08C08L2201/04C08L83/04C08K3/04C08K3/042C08K9/06
Inventor 史猛顾伟王小军
Owner 中广核三角洲(江苏)塑化有限公司
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