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Silicone rubber material with high corrosion resistance and preparation method thereof

A corrosion-resistant, silicone rubber technology, applied in the field of high corrosion-resistant silicone rubber materials and its preparation, can solve the problems of easy hydrolysis reaction, poor hydrolysis and corrosion resistance, and decreased mechanical properties of products.

Inactive Publication Date: 2021-08-31
SHENZHEN TAIKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a highly corrosion-resistant silicone rubber material and its preparation method: by adding modified silicone rubber and thermoplastic polyurethane elastomer to an open mill for kneading, and then adding hydrolysis Inhibitor mixing, then adding white carbon black to continue mixing, cutting, placing the rubber material at room temperature, and then performing secondary mixing, and then placing the mixed rubber material in a vulcanizer to complete vulcanization to obtain the high The corrosion-resistant silicone rubber material solves the problem that the existing silicone rubber and polyurethane composite materials have excellent mechanical properties, but their hydrolysis resistance and corrosion resistance are poor, and hydrolysis reactions are prone to occur, resulting in a sharp decline in the mechanical properties of the product.

Method used

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  • Silicone rubber material with high corrosion resistance and preparation method thereof
  • Silicone rubber material with high corrosion resistance and preparation method thereof
  • Silicone rubber material with high corrosion resistance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0049] The present embodiment is a preparation method of modified silicone rubber, comprising the following steps:

[0050] A1: P-bromophenol, cesium carbonate and dimethyl sulfoxide were added to a three-necked flask equipped with a stirrer, a gas pipe and a constant pressure dropping funnel, protected by argon, and the stirring rate was 500 r / min at room temperature Stir for 10 h under the same conditions, and then add p-bromotrifluorotoluene dropwise while stirring, and control the drop rate to be 5 mL / min. After the dropwise addition, the temperature is raised to 50 °C, and the stirring reaction is continued for 20 h, and the heating rate is controlled to 1 °C / min. After the reaction was completed, vacuum filtration, the filtrate was extracted twice with ethyl acetate, the extracts were combined and washed twice with saturated sodium chloride solution, left to stand for layers, the organic layer was dried with anhydrous sodium sulfate, and then the organic layer was After ...

Embodiment 2

[0055] The present embodiment is a preparation method of modified silicone rubber, comprising the following steps:

[0056] A1: P-bromophenol, cesium carbonate and dimethyl sulfoxide were added to a three-necked flask equipped with a stirrer, a gas pipe and a constant pressure dropping funnel, protected by argon gas, and the stirring rate was 800 r / min at room temperature Stir for 12h under the same conditions, then add p-bromotrifluorotoluene dropwise while stirring, control the dropwise acceleration rate to 1mL / min, after the dropwise addition, the temperature is raised to 55°C and continue to stir for 30h, and the heating rate is controlled to 1°C / min, After the reaction was completed, vacuum filtration, the filtrate was extracted three times with ethyl acetate, the extracts were combined and washed three times with saturated sodium chloride solution, left to stand for layers, the organic layer was dried with anhydrous sodium sulfate, and then the organic layer was After co...

Embodiment 3

[0061] The present embodiment is a preparation method of a hydrolysis inhibitor, comprising the following steps:

[0062] Add bisphenol A, epichlorohydrin, deionized water, and isopropanol into a four-necked flask equipped with a stirrer, a reflux condenser and a constant-pressure dropping funnel, and stir at a stirring rate of 500 r / min. When the bisphenol A is completely dissolved, the sodium hydroxide solution is added dropwise while stirring under the condition of heating up to 70 °C, and the drop rate is controlled to be 2 seconds / drop. Then add chloroform to the reaction product and continue to stir for 5 min, then wash with distilled water for 3 times, let stand for layers, collect the organic phase and dry with anhydrous magnesium sulfate, filter, and rotate the filtrate to evaporate, and then pass the evaporated product through a silica gel column layer. Purified by analytical method, then placed in a vacuum drying oven to dry to obtain a hydrolysis inhibitor; the dos...

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Abstract

The invention discloses a silicone rubber material with high corrosion resistance and a preparation method thereof, belonging to the field of rubber materials. According to the invention, modified silicone rubber and a thermoplastic polyurethane elastomer are added into an open mill for open milling; then a hydrolysis inhibitor and white carbon black are sequentially added for mixing and blanking; a rubber material is placed at room temperature, and then secondary mixing is performed; and the mixed rubber material is placed in a vulcanizing machine to complete vulcanization so as to obtain the high-corrosion-resistance silicone rubber material. According to the preparation method, the hydrophobic property and the stability of silicone rubber are improved by preparing the modified silicone rubber, and the hydrolysis inhibitor is prepared and is subjected to a ring-opening addition reaction with carboxyl groups, hydroxyl groups, amino groups and the like containing protons generated in the hydrolysis process of thermoplastic polyurethane elastomer, so the hydrolysis of the thermoplastic polyurethane elastomer is inhibited; and under the synergistic effect of the modified silicone rubber and the hydrolysis inhibitor, the silicone rubber-polyurethane composite material has excellent mechanical properties and excellent corrosion resistance.

Description

technical field [0001] The invention relates to the field of rubber materials, in particular to a highly corrosion-resistant silicone rubber material and a preparation method thereof. Background technique [0002] Silicone rubber is a straight-chain, high-molecular-weight polysiloxane. The main chain of the molecule is composed of silicon atoms and oxygen atoms alternately (-Si-O-Si-). The bond energy between silicon-oxygen bonds ( 422KJ / mol) is much larger than the bond energy between carbon-carbon bonds (240KJ / mol). Silicone rubber is non-toxic and tasteless, and has electrical insulation, light aging resistance, and good high and low temperature resistance (at 300 ° C and -90°C, it still retains its original strength and elasticity), mildew resistance, oxygen aging resistance and chemical stability, so it is widely used in aerospace, chemical industry, agriculture, medical and health care, and electronic and electrical industries; [0003] Thermoplastic polyurethane, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08L75/04C08K7/26C08K5/1515C08G77/24
CPCC08L83/08C08G77/24C08L2207/04
Inventor 林文虎
Owner SHENZHEN TAIKE TECH
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