Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Methyl vinyl silicone rubber and preparation method thereof

A technology of methyl vinyl silicon and vinyl fluorosilicone oil, applied in the field of methyl vinyl silicone rubber and its preparation, can solve the problems of reduced flexibility of fluororubber molecular chain, high oil resistance processing performance, poor processability and the like , to achieve the effect of improving crosslinking density, good processability and low cost

Active Publication Date: 2021-05-14
GUANGZHOU BAIYUN CHEM IND
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the decrease of the flexibility of the fluorine rubber molecular chain, the increase of the rigidity, and the poor processability, the high-viscosity fluorine rubber has a large extrusion expansion coefficient, resulting in rough wrinkling on the surface of the extruded product, and it is necessary to control the amount of fluorine rubber added. , so that the silicone rubber is the continuous phase and the fluorine rubber is the dispersed phase in the blended rubber, and the surface of the extruded product is smooth
Therefore, the blending of fluorine rubber and methyl vinyl silicone rubber is difficult to balance high oil resistance and good processing performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methyl vinyl silicone rubber and preparation method thereof
  • Methyl vinyl silicone rubber and preparation method thereof
  • Methyl vinyl silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] The present invention also provides the preparation method of above-mentioned methyl vinyl silicone rubber, comprises the steps:

[0043] The methyl vinyl silicone rubber raw rubber, reinforcing filler, vinyl fluorosilicone oil, structure control agent and mold release agent are kneaded for the first time, and then the preheated fluororubber and auxiliary vulcanization agent are added. Secondary kneading to prepare mixed rubber;

[0044] Mixing the mixed rubber with the vulcanizing agent and performing a thinning treatment to prepare a mixed rubber film;

[0045] Extruding and vulcanizing the mixed rubber sheet.

[0046] The above-mentioned preparation method of methyl vinyl silicone rubber adds preheated fluororubber to the kneader in the last step of the silicone rubber mixing rubber production process, which can not only simplify the production steps, improve production efficiency, but also reduce the amount of fluororubber in the process. Fluorine loss in In one ...

Embodiment 1

[0053] The present embodiment is a kind of methyl vinyl silicone rubber, and its preparation method is as follows:

[0054] Preheat 30 parts of binary fluororubber (with a fluorine content of 66%) in an oven at 80°C for 2 hours. Add 19.5 parts of methyl vinyl silicone rubber raw rubber (vinyl mole fraction: 0.03%, average molecular weight: about 650,000), 45.5 parts of methyl vinyl silicone rubber raw rubber (vinyl mole fraction: 0.21%) into the kneader , average molecular weight: 680,000) and then add 4 parts of α, ω-dihydroxy polydimethylsiloxane (viscosity: 30mPa.s), 30 parts of precipitated silica (specific surface area: 200m 2 / g), 4 parts of vinyl-terminated fluorosilicone oil (70% fluorine content), 0.2 part of zinc stearate, kneaded at room temperature for 2 hours, fully kneaded evenly, then kneaded at 170 ° C and under normal pressure for 2 hours, and then Knead at 170°C for 2 hours at a vacuum of -0.08MPa, cool to 80°C, add 30 parts of binary fluororubber and 4 part...

Embodiment 2

[0057] The present embodiment is a kind of methyl vinyl silicone rubber, and its preparation method is as follows:

[0058] Preheat 30 parts of binary fluororubber (with a fluorine content of 66%) in an oven at 80°C for 2 hours. Add 19.5 parts of methyl vinyl silicone rubber raw rubber (vinyl mole fraction: 0.03%, average molecular weight: about 650,000), 45.5 parts of methyl vinyl silicone rubber raw rubber (vinyl mole fraction: 0.21%) into the kneader , average molecular weight: about 680,000) then add 4 parts of α, ω-dihydroxy polydimethylsiloxane (viscosity: 30mPa.s), 30 parts of precipitated silica (specific surface area: 200m2 / g), 6 1 part vinyl fluorosilicone oil (50% fluorine content), 0.2 part zinc stearate, kneaded at room temperature for 2 hours, fully kneaded evenly, then kneaded at 150°C for 2 hours at normal pressure, and then kneaded at 170°C under vacuum Knead for 2 hours at a temperature of -0.08MPa, cool to 80°C, add 30 parts of binary fluororubber and 4 par...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
viscosityaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to methyl vinyl silicone rubber and a preparation method thereof. The methyl vinyl silicone rubber is prepared from the following components in parts by weight: 60 to 70 parts of methyl vinyl silicone rubber raw rubber, 25 to 35 parts of fluororubber, 2 to 10 parts of vinyl fluorosilicone oil, 3 to 6 parts of a structure control agent, 2 to 10 parts of an auxiliary vulcanizing agent, 15 to 30 parts of reinforcing filler, 1 to 4 parts of a vulcanizing agent and 0.1 to 0.5 part of a release agent. The auxiliary vulcanizing agent is at least one of trimethylolpropane trimethacrylate, triallyl isocyanurate and ethoxylated trimethylolpropane triacrylate. The methyl vinyl silicone rubber has relatively high oil resistance and high temperature resistance, and meanwhile, the processability of extrusion molding is good.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a methyl vinyl silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber has excellent properties such as high and low temperature resistance, weather resistance, physiological inertia, low compression set, odorless, and can be colored. It is widely used in building doors and windows, electronic appliances, automobiles, aerospace and other fields. Conventional methyl vinyl silicone rubber has poor performance in solvent and oil resistance due to its non-polarity, which limits its application in the field of oil resistance. Generally, the equipment using oil-resistant rubber will increase the temperature of the working environment due to the energy loss during the use of equipment such as friction and compression. Therefore, it is necessary for the sealing rubber to maintain excellent performance under high temperature for a long tim...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L27/12C08L83/08C08K13/04C08K7/26C08K5/103C08K5/3492C08K5/14
CPCC08L83/04C08L2201/08C08L2205/035C08L2205/02C08K2201/006C08L2205/08C08L2205/05C08L27/12C08L83/08C08K13/04C08K7/26C08K5/103C08K5/14C08K5/34924
Inventor 饶友陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com