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Oil-proof silicone rubber sealant

A silicone rubber, sealant technology, applied in the direction of adhesives, benzofuran-indene copolymer adhesives, adhesive types, etc., can solve problems such as the reduction of rubber strength and other mechanical properties, and achieve improved solvent resistance, high Effects of early pressure tightness and excellent heat resistance

Inactive Publication Date: 2018-03-06
TIANJIN JINLING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the use of rubber products, oil can penetrate into the rubber, and the molecules diffuse with each other, which changes the network structure of the vulcanized rubber, resulting in a decrease in the strength and other mechanical properties of the rubber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An oil-resistant silicone rubber sealant, the mass ratio of which is: 45 parts of polydimethylsiloxane, 25 parts of fluororubber, 11 parts of phenolic resin, 15 parts of organic high-purity montmorillonite, and 10-20 parts of calcium stearate , 7 parts of vinyl tributylketoxime silane, 4 parts of white carbon black, 3 parts of epoxy soybean oil, 2 parts of bis-pentasulfurizing agent.

Embodiment 2

[0018] An oil-resistant silicone rubber sealant, the mass ratio of which is: 36 parts of polydimethylsiloxane, 30 parts of fluororubber, 13 parts of coumarone resin, 17 parts of light calcium carbonate, 10 parts of calcium stearate 20 parts, 5 parts of vinyl tributylketoxime silane, 2 parts of white carbon black, 2 parts of epoxy soybean oil, 1 part of bis-pentasulfurizing agent.

Embodiment 3

[0020] An oil-resistant silicone rubber sealant, the mass ratio of which is: 50 parts of polydimethylsiloxane, 45 parts of fluororubber, 15 parts of phenolic resin, 10 parts of aluminum tripolyphosphate, 10-20 parts of calcium stearate , 10 parts of vinyl tributylketoxime silane, 5 parts of white carbon black, 1 part of epoxy soybean oil, 0.5 part of bis-pentasulfurizing agent.

[0021] The tensile strengths of the sealants of Examples 1-3 after curing were 2.3 MPa, 2.5 MPa, and 2.2 MPa, respectively.

[0022] Pressure tightness refers to the air pressure sealing pressure that the seal can withstand after the sealant is filled in the gap between two parts to form a seal. After the silicone rubber sealant of Examples 1-3 is assembled and pressed for 15 minutes, the air pressure sealing pressure that the seal can withstand is 0.4bar (0.04Mpa), 0.6bar (0.06Mpa), 0.5bar (0.05Mpa), and has a relatively High initial pressure tightness.

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Abstract

The invention discloses an oil-proof silicone rubber sealant which is characterized in that the sealant comprises the following raw material ingredients in parts by mass: 30-50 parts of silicone rubber, 20-50 parts of fluororubber, 10-15 parts of tackifier, 10-20 parts of filling, 10-20 parts of calcium stearate, 1-10 parts of vinyltris (methylethylketoximino) silane, 2-5 parts of white carbon black, 1-3 parts of epoxy soybean oil and 0.5-3 parts of valcanizer. The oil-proof rubber sealant has the advantages of good heat and low temperature resistance, oil resistance, chemical resistance and decreased elongation at break.

Description

technical field [0001] The invention relates to the technical field of sealing products, in particular to an oil-resistant silicone rubber sealant. Background technique [0002] Sealant is an adhesive used to fill the configuration gap to play a sealing role. It has the functions of anti-leakage, waterproof, anti-vibration, sound insulation and heat insulation. In the aerospace industry, automobile industry, machinery manufacturing, oil exploration, oil refining and other industrial production, a large number of rubber products used in fuel oil, lubricating oil, hydraulic oil and other oils are required. [0003] During the use of rubber products, oil can penetrate into the interior of the rubber, and the molecules diffuse with each other, which changes the network structure of the vulcanized rubber, resulting in a decrease in the strength and other mechanical properties of the rubber. Therefore, a large number of rubber materials with good oil resistance are needed in vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J127/12C09J161/06C09J145/02C09J11/08C09J11/06C09J11/04
CPCC09J183/04C08K2003/265C08K2003/327C08K2201/003C08K2201/006C08L2201/08C08L2205/035C09J11/04C09J11/06C09J11/08C08L27/12C08L61/06C08L91/00C08K13/06C08K3/346C08K5/098C08K5/5465C08K3/36C08L45/02C08K13/02C08K3/26C08K3/32
Inventor 张德全
Owner TIANJIN JINLING TECH
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