Oil-resistant, high-temperature-resistant and low-volatile organic silica gel

A technology of organic silica gel and low volatile content, applied in the field of organic silica gel and its preparation, which can solve the problems of reducing strength and other mechanical properties, affecting the service life of materials, etc.

Active Publication Date: 2020-11-03
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the assembly of automobile engines or transmission systems, it is necessary to use liquid silicone rubber gaskets (FIPG) to replace traditional solid gasket materials, so that the design and production of automobiles can meet the requirements of light weight, small size, high power and environmental protection. Development requirements, in these applications, silicone rubber will be subjected to continuous aging of thermal engine oil, resulting in a gradual decrease in its strength and other mechanical properties, thereby affecting the service life of the material

Method used

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  • Oil-resistant, high-temperature-resistant and low-volatile organic silica gel
  • Oil-resistant, high-temperature-resistant and low-volatile organic silica gel
  • Oil-resistant, high-temperature-resistant and low-volatile organic silica gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Methyl vinyl MQ resin (vinyl content 0.5mmol / g, viscosity at 25°C is 7000mPa.S), methyl silicone oil ((Me3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m , viscosity at 25°C is 300mPa.S), silane coupling agent 1, silane coupling agent 2, silane coupling agent 3, hydrogen-containing silicone oil ((Me 3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m (HMeSiO 0.5 ) n , m=30, n=25, hydrogen content is 8.9mmol / g, viscosity at 25°C is 20mPa.S), white carbon black (specific surface area is 150-200m 2 / g hydrophobic silica), Pt catalyst (vinyl siloxane complex of chloroplatinic acid, platinum content 2000ppm), inhibitor (1-ethynyl-1 cyclohexanol), black color paste by 35 :40:2:0.5:0.5:2:6:0.02:0.02:0.03 weight ratio mixing. After vacuum defoaming, solidify at 150°C for 2h. The properties of the samples are shown in Table 1, and the test methods are shown in Table 1.

Embodiment 2

[0035] Methyl vinyl MQ resin (vinyl content 0.5mmol / g, viscosity at 25°C is 7000mPa.S), methyl silicone oil ((Me 3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m , viscosity at 25°C is 300mPa.S), silane coupling agent 1, silane coupling agent 2, silane coupling agent 3, hydrogen-containing silicone oil ((Me 3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m (HMeSiO 0.5 ) n , m=30, n=25, hydrogen content is 8.9mmol / g, viscosity at 25°C is 20mPa.S), white carbon black (specific surface area is 150-200m 2 / g hydrophobic silica), Pt catalyst (vinyl siloxane complex of chloroplatinic acid, platinum content 2000ppm), inhibitor (1-ethynyl-1 cyclohexanol), black color paste by 35 :40:1.25:1.25:0.5:2:6:0.02:0.02:0.03 weight ratio mixed. After vacuum defoaming, solidify at 150°C for 2h. The properties of the samples are shown in Table 1, and the test methods are shown in Table 1.

Embodiment 3

[0037] Methyl vinyl MQ resin (vinyl content 0.5mmol / g, viscosity at 25°C is 7000mPa.S), methyl silicone oil ((Me 3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m , viscosity at 25°C is 300mPa.S), silane coupling agent 1, silane coupling agent 2, silane coupling agent 3, hydrogen-containing silicone oil ((Me 3 SiO 0.5 ) 2 (Me 2 SiO 0.5 ) m (HMeSiO 0.5 ) n , m=30, n=25, hydrogen content is 8.9mmol / g, viscosity at 25°C is 20mPa.S), white carbon black (specific surface area is 150-200m 2 / g hydrophobic silica), Pt catalyst (vinyl siloxane complex of chloroplatinic acid, platinum content 2000ppm), inhibitor (1-ethynyl-1 cyclohexanol), black color paste by 35 :40:1.25:0.5:1.25:2:6:0.02:0.02:0.03 weight ratio mixing. The properties of the samples are shown in Table 1, and the test methods are shown in Table 1.

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Abstract

The invention relates to oil-resistant, high-temperature-resistant and low-volatile organic silica gel. Methyl vinyl MQ resin, methyl silicone oil, a silane coupling agent 1, a silane coupling agent 2, a silane coupling agent 3, hydrogen-containing silicone oil, white carbon black, a Pt catalyst, an inhibitor and black color paste are mixed in a weight ratio of (20-35) : (40-50) : (0.5-3) : (0.5-3) : (0.5-3) : (3-9) : (1-6) : (0.02-0.1) : (0.02-0.1) : (0.03-0.5). The silane coupling agent 1 adopted by the invention contains a plurality of ethoxy groups, so that the silane coupling agent 1 canplay a role of a water absorbent while playing a role of a coupling agent, the content of moisture in a system is reduced, and the storage stability of the product is improved; meanwhile, the silane coupling agent 2 contains two adjacent benzene rings, so that the cracking temperature of the glue at high temperature can be increased; besides, ether chain molecules contained in the silane couplingagent 3 fill among polysiloxane molecular chains, so that corrosion of oil molecules to colloid is effectively blocked.

Description

technical field [0001] The invention relates to an oil-resistant, high-temperature-resistant, low-volatile organic silica gel and a preparation method thereof, belonging to the field of organic silicon modification. [0002] technical background [0003] In the aviation industry, automobile industry, machinery manufacturing, oil refining and other industrial production, a large number of rubber sealing products that can withstand the aging of medium such as engine oil, lubricating oil and hydraulic oil are usually required. For example, in the assembly of automobile engines or transmission systems, it is necessary to use liquid silicone rubber gaskets (FIPG) to replace traditional solid gasket materials, so that the design and production of automobiles can meet the requirements of light weight, small size, high power and environmental protection. Development requirements, in these applications, silicone rubber will be subjected to the continuous aging effect of thermal engine...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08L83/05C08L83/10C08L83/12C08K13/04C08K7/26C08K5/5425C08G77/44C08G77/46
CPCC08L83/04C08G77/44C08G77/46C08L2205/025C08L2205/035C08L2205/02C08L2201/08C08L83/10C08L83/12C08K13/04C08K7/26C08K5/5425
Inventor 王传萍徐友志王建斌陈田安
Owner YANTAI DARBOND TECH
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