Low-temperature-resistant silicon rubber and preparation process thereof

A preparation process and low temperature resistance technology, applied in the field of low temperature resistant silicone rubber and its preparation, can solve the problems of poor mechanical properties of low temperature resistant rubber, limited application scope, poor mechanical properties, etc., achieve strong low temperature resistance performance, improve mechanical properties, The effect of short curing time

Inactive Publication Date: 2019-12-06
ANHUI LIXIN RUBBER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of silicone rubber, people have put forward higher and higher requirements for its performance. Therefore, more and more researchers hope to obtain better performance by means of modification while ensuring its original excellent properties. Silicone rubber, while silicone rubber has excellent properties, it also has a series of defects that need to be improved, such as poor mechanical properties, easy crystallization at low temperature, poor hydrophilicity, etc., which limit the scope of application
[0003] In the prior art, methyl vinyl silica gel is used as raw rubber to prepare low-temperature-resistant rubber, but the prepared low-temperature-resistant rubber has poor mechanical properties, and the two cannot be combined.

Method used

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  • Low-temperature-resistant silicon rubber and preparation process thereof
  • Low-temperature-resistant silicon rubber and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of modified methyl vinyl silica gel: Weigh 5g of methyl vinyl silica gel into a 150ml Erlenmeyer flask, add 50ml of tetrahydrofuran, stir until fully dissolved, add mercaptopropionic acid at a ratio of vinyl to mercapto molar ratio of 1:1.3, At the same time, 1wt% photocatalyst DMPA was added, stirred until fully mixed, and then placed under ultraviolet light to initiate a mercapto-ene click chemical reaction. After the reaction was completed, tetrahydrofuran was rotary evaporated to obtain a modified methyl vinyl group.

Embodiment 2

[0032] Preparation of low temperature resistant rubber:

[0033] S1. Kneading: Knead 80g of modified methyl vinyl silica gel and 1g of zinc stearate as a release agent in a vacuum kneader for 3-5 minutes, first add 5g of graphene oxide into the organic solvent tetrahydrofuran, and ultrasonicate for 5 minutes to form Uniform and stable dispersion, then add the dispersion to the kneaded silica gel, continue ultrasonic stirring, the modified methyl vinyl silica gel will gather into the graphene oxide sheet structure in the form of intercalation, and the solvent molecules will continue to desorb The form ensures the entropy balance of the system, and finally forms a stable intercalation structure. The solvent is removed by rotary evaporation to obtain a graphene oxide / rubber composite material, and 40g of white carbon black, 3g of white oil, 0.1g of zinc oxide, 0.2g of 2 -Mercaptobenzimidazole, 0.1g dioctyl adipate, 10-50 rpm, stir and mix evenly, heat treatment at 60-90°C for 10-...

Embodiment 3

[0037] Preparation of low temperature resistant rubber:

[0038] S1. Kneading: Knead 100g of modified methyl vinyl silica gel and 3g of zinc stearate as a release agent in a vacuum kneader for 3-5 minutes, first add 10g of graphene oxide into the organic solvent tetrahydrofuran, and ultrasonicate for 5 minutes to form Uniform and stable dispersion, then add the dispersion to the kneaded silica gel, continue ultrasonic stirring, the modified methyl vinyl silica gel will gather into the graphene oxide sheet structure in the form of intercalation, and the solvent molecules will continue to desorb The form ensures the entropy balance of the system, and finally forms a stable intercalation structure. The solvent is removed by rotary evaporation to obtain a graphene oxide / rubber composite material, and 50g of white carbon black, 5g of white oil, 0.2g of zinc oxide, 0.4g of 2 -Mercaptobenzimidazole, 0.4g dioctyl adipate, 10-50 rpm, stir and mix evenly, heat treatment at 60-90°C for 1...

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PUM

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Abstract

The invention discloses low-temperature-resistant silicon rubber and a preparation process thereof. The low-temperature-resistant silicon rubber comprises the following components in parts by mass: 80-100 parts of modified methyl vinyl silica gel, 40-50 parts of white carbon black, 5-10 parts of graphene oxide, 3-5 parts of white oil, 1-3 parts of zinc stearate, 10-20 parts of an organic peroxide,1-5 parts of a vulcanizing agent and 0.5-1 part of a composite additive. The low-temperature-resistant silicon rubber is prepared through mixing, remilling and vulcanization, and the prepared low-temperature-resistant silicon rubber is good in low temperature resistance, improved in hydrophilcity, high in strength, good in toughness, good in elasticity and good in ductility.

Description

technical field [0001] The invention relates to the technical field of rubber preparation, in particular to a low-temperature resistant silicone rubber and a preparation process thereof. Background technique [0002] With the continuous development of silicone rubber, people have put forward higher and higher requirements for its performance. Therefore, more and more researchers hope to obtain better performance by means of modification while ensuring its original excellent properties. Silicone rubber, while silicone rubber has excellent properties, it also has a series of defects that need to be improved urgently, such as poor mechanical properties, easy crystallization at low temperature, poor hydrophilicity, etc., which limit the scope of application. [0003] In the prior art, methyl vinyl silica gel is used as raw rubber to prepare low-temperature-resistant rubber, but the prepared low-temperature-resistant rubber has poor mechanical properties, and the two cannot be co...

Claims

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Application Information

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IPC IPC(8): C08L83/08C08L91/06C08K13/02C08K3/36C08K3/04C08K5/098C08K5/14C08G77/392B29C35/08B29C35/04
CPCB29C35/049B29C35/0805B29C2035/0855C08G77/392C08K2003/2296C08L83/08C08L91/06C08K13/02C08K3/36C08K3/042C08K5/098C08K5/14C08K3/22C08K5/378C08K5/11
Inventor 汪必宽胡恒志向雷雷
Owner ANHUI LIXIN RUBBER TECH CO LTD
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