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Compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber and preparation method of compatilizer

A technology of EPDM rubber and compatibilizer, which is applied in the field of polymer material processing, can solve the problems of poor mechanical properties, poor compatibility, and failure to meet general use requirements of silicone rubber, and achieve thermal oxygen aging performance improvement and improvement The effect of blend compatibility

Inactive Publication Date: 2019-06-11
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor mechanical properties of silicone rubber, it cannot meet the general use requirements. At present, it is blended with EPDM rubber on the market to improve heat resistance and aging resistance.
However, since the main chain of EPDM rubber is (C-C), and the main chain of silicone rubber is mainly (Si-O), the compatibility between the two is poor, and even phase separation will occur, so that the performance improvement cannot be achieved. Effect

Method used

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  • Compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber and preparation method of compatilizer
  • Compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber and preparation method of compatilizer
  • Compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber and preparation method of compatilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare compatibilizer according to following basic composition and mass parts:

[0032] Liquid EPDM T67 100 parts

[0033] (the third monomer is norbornadiene, with a mass content of 9.5%)

[0034] Hydrogen-containing silicone oil (Si-H mass content 0.4%) 30 parts

[0035] Catalyst H 2 PtCl 6 ·6H 2 O(50ppm) 0.5 parts

[0036] making process:

[0037] 1) Dissolution of EPDM rubber: first weigh 100 g of liquid EPDM rubber, then add 1000 ml of cyclohexane, stir and dissolve at room temperature;

[0038] 2) Hydrosilylation reaction: Add 30g of hydrogen-containing silicone oil to the EPDM solution, then add 0.5g of catalyst, and stir the reaction at a temperature of 60°C;

[0039] 3) Flocculation: Pour the reaction liquid product into boiling water and keep boiling for 30 minutes, evaporate the solvent, extract the product by Soxhlet extraction for 12 hours, and dry the extracted product in a vacuum oven at 60°C to obtain the obtained the above-mentioned compatibili...

Embodiment 2

[0041] Prepare compatibilizer according to following basic composition and mass parts:

[0042] Liquid EPDM T67 100 parts

[0043] (the third monomer is norbornadiene, with a mass content of 9.5%)

[0044] Hydrogen-containing silicone oil (Si-H mass content 0.4%) 40 parts

[0045] Catalyst H 2 PtCl 6 ·6H 2 O(50ppm) 0.8 parts

[0046] making process:

[0047] 1) Dissolution of EPDM rubber: first weigh 100 g of liquid EPDM rubber, then add 1000 ml of cyclohexane, stir and dissolve at room temperature;

[0048] 2) Hydrosilylation reaction: Add 40g of hydrogen-containing silicone oil to the EPDM rubber solution, then add 0.8g of catalyst, and stir and react at a temperature of 60°C;

[0049] 3) Flocculation: Pour the reaction liquid product into boiling water and keep boiling for 30 minutes, evaporate the solvent, extract the product by Soxhlet extraction for 12 hours, and dry the extracted product in a vacuum oven at 60°C to obtain the obtained the above-mentioned compati...

Embodiment 3

[0051] Prepare compatibilizer according to following basic composition and mass parts:

[0052] Liquid EPDM T67 100 parts

[0053] (the third monomer is norbornadiene, with a mass content of 9.5%)

[0054] Hydrogen-containing silicone oil (Si-H mass content 0.4%) 50 parts

[0055] Catalyst H 2 PtCl 6 ·6H 2 O(50ppm) 1 part

[0056] making process:

[0057] 1) Dissolution of EPDM rubber: first weigh 100 g of liquid EPDM rubber, then add 1000 ml of cyclohexane, stir and dissolve at room temperature;

[0058]2) Hydrosilylation reaction: Add 50g of hydrogen-containing silicone oil to the EPDM solution, then add 1g of catalyst, and stir the reaction at a temperature of 60°C;

[0059] 3) Flocculation: Pour the reaction liquid product into boiling water and keep boiling for 30 minutes, evaporate the solvent, extract the product by Soxhlet extraction for 12 hours, and dry the extracted product in a vacuum oven at 60°C to obtain the obtained the above-mentioned compatibilizer. ...

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Abstract

The invention relates to a compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber. The compatilizer comprises 100 parts of liquid ethylene propylenediene monomer, 30-50 parts of hydrogen-containing silicone oil and 0.5-1 part of a catalyst. The preparation method comprises the following steps: firstly, dissolving the liquid ethylene propylene diene monomer, then adding the hydrogen-containing silicone oil and the catalyst, and carrying out a hydrosilylation reaction to graft the hydrogen-containing silicone oil onto the liquid ethylene propylene diene monomer to prepare the compatilizer. The novel compatilizer can be enriched at the interface of two phases in a blending process of ethylene propylene diene monomer with methyl vinyl silicone rubber, and surface tension of the two phases is reduced through physical or chemical effects generated by the compatilizer with a two-phase polymer component, so that an effect of improving compatibility of the two components is achieved, and performance of blended rubber is improved.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a compatibilizer for improving the blending compatibility of EPDM rubber and silicone rubber and a preparation method thereof. Background technique [0002] Since the main chain of EPDM rubber is composed of chemically stable saturated hydrocarbons and only contains unsaturated double bonds in the side chain, it has excellent aging resistance such as ozone resistance, heat resistance, and weather resistance, and is often used for high temperature resistance. In the preparation of aged materials, such as conveyor belts, tires, automotive parts, etc. [0003] Since the main chain of the silicone rubber molecule is mainly composed of (Si-O) bonds, its bond energy is 443.5KJ mol -1 , The bond length is 166pm, which is much larger than ordinary rubber, and its main chain saturation is high, which makes it more heat-resistant and aging-resistant than EPDM rubber. However, d...

Claims

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Application Information

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IPC IPC(8): C08G77/42C08L23/16C08L83/07C08L91/06C08L83/10C08K13/02C08K3/36C08K5/14
Inventor 汤楠吴卫东杨林陈勇前赵振伟黄强
Owner BEIJING UNIV OF CHEM TECH
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