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Hydrophobicity-enhanced heat-vulcanized silicone rubber and preparation method thereof

A technology of thermal vulcanization and silicone rubber, applied in the field of hydrophobic enhanced thermal vulcanization silicone rubber and its preparation, to achieve the effects of improving electric charge, improving elastic modulus, and improving storage modulus

Inactive Publication Date: 2017-10-24
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the modification based on silicone rubber is mostly simple addition and mixing, and nanomaterials can only modify a single property of silicone rubber, and the uniform dispersion in solid heat vulcanized silicone rubber is also a problem. The modification of silicone rubber still needs further research and improvement

Method used

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  • Hydrophobicity-enhanced heat-vulcanized silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the material ratio of tetramethyldivinyldisiloxane and mixed solution and ethyl orthosilicate is 7.5g:10mL:10g, the volume ratio of adding tetramethyldivinyldisiloxane is 1:10: A mixed solution of 20% concentrated hydrochloric acid, deionized water and ethanol, mechanically stirred, quickly dropwise added tetraethyl orthosilicate, hydrolyzed and condensed, added toluene for extraction and layering, to obtain methyl vinyl silicone resin, according to the cross-linked polyethylene particles and The molar ratio of methyl vinyl silicone resin is 0.5:2. Dry the cross-linked polyethylene particles in vacuum at 80°C for 8 hours, add them to the methyl vinyl silicone resin, stir well, and then press and vulcanize at 180°C 15 minutes, and then a second heat treatment in vacuum at 80°C for 8 hours to obtain a methyl vinyl silicone resin cross-linked with polyethylene particles.

[0026] (2) Add nano-montmorillonite, amorphous alumina and titanium dioxide with a molar...

Embodiment 2

[0029] According to the material ratio of tetramethyldivinyldisiloxane to mixed solution and ethyl orthosilicate is 8g:10mL:15g, the volume ratio of adding tetramethyldivinyldisiloxane is 1:15:25 A mixed solution of concentrated hydrochloric acid, deionized water and ethanol, mechanically stirred, quickly dropwise added tetraethyl orthosilicate, hydrolyzed and condensed, added toluene for extraction and layering, to obtain methyl vinyl silicone resin, according to the cross-linked polyethylene particles and formaldehyde The molar ratio of the base vinyl silicone resin is 1:5, the cross-linked polyethylene particles are dried in vacuum at 80°C for 8 hours, added to the methyl vinyl silicone resin, stirred evenly, and molded and vulcanized at 180°C for 15 minutes , and then heat-treated twice in vacuum at 80°C for 8h to obtain a methyl vinyl silicone resin cross-linked with polyethylene particles.

[0030] (2) Add nano-montmorillonite, amorphous alumina and titanium dioxide with...

Embodiment 3

[0033]According to the material ratio of tetramethyldivinyldisiloxane and mixed solution and ethyl orthosilicate is 7.8g:10mL:12g, the volume ratio of adding tetramethyldivinyldisiloxane is 1:13: A mixed solution of 21 concentrated hydrochloric acid, deionized water and ethanol, mechanically stirred, quickly dropwise added tetraethyl orthosilicate, hydrolyzed and condensed, added toluene for extraction and layering, to obtain methyl vinyl silicone resin, according to the cross-linked polyethylene particles and The molar ratio of methyl vinyl silicone resin is 0.7:3. Dry the cross-linked polyethylene particles in vacuum at 80°C for 8 hours, add them to the methyl vinyl silicone resin, stir them evenly, and press and vulcanize at 180°C 15 minutes, and then a second heat treatment in vacuum at 80°C for 8 hours to obtain a methyl vinyl silicone resin cross-linked with polyethylene particles.

[0034] (2) Add nano-montmorillonite, amorphous alumina and titanium dioxide with a molar...

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Abstract

The invention provides hydrophobicity-enhanced heat-vulcanized silicone rubber and a preparation method thereof. The specific preparation method of the silicone rubber comprises steps as follows: divinyltetramethyldisiloxane is mixed with a mixed solution of concentrated hydrochloric acid, deionized water and ethanol, the mixture is mechanically stirred, ethyl orthosilicate is dropwise added, the mixture is subjected to hydrolytic condensation, methylbenzene is added for extraction and layering, methyl vinyl silicone resin is obtained, crosslinked polyethylene particles are added to the methyl vinyl silicone resin, the mixture is stirred uniformly and subjected to molding curing and vacuum heat treatment, and the polyethylene particle crosslinked methyl vinyl silicone resin is obtained; nano-montmorillonite, amorphous alumina and titanium dioxide are added to a polydimethylsiloxane prepolymer, the mixture is mixed and subjected to crosslinking and curing, and a reinforced material coated with organic silicone rubber is obtained; the polyethylene particle crosslinked methyl vinyl silicone resin, the reinforced material coated with organic silicone rubber, 2,4-dichlorobenzoyl peroxide, diphenyl silanediol and octamethylcyclotetrasiloxane are mixed uniformly, left to stand, subjected to open milling and secondary vulcanization, and the hydrophobicity-enhanced heat-vulcanized silicone rubber is obtained.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber materials, and in particular relates to a hydrophobically reinforced thermally vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a polymer elastic material with both inorganic and organic molecular chains. The chemical structure of room temperature vulcanized silicone rubber is hydroxyl-terminated polydimethylsiloxane. The silicone molecule is soft and easy to rotate and curl into a helical structure. Compared with ordinary rubber, silicone rubber has higher heat resistance. The main bond of silicone rubber is connected by alternating Si-O chains, because the bond energy of Si-O bonds is much larger than that of C-C bonds. , so it has excellent high and low temperature resistance, low glass transition temperature, strong resistance to nitroglycerin migration, ozone resistance and weather resistance, excellent electrical insulation...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L23/06C08K13/06C08K9/06C08K3/34C08K3/22C08K5/14C08K5/549C08K5/5419C08J3/24B29C35/02
CPCC08L83/04B29C35/02C08J3/24C08J2383/07C08J2423/06C08K2003/2227C08K2003/2241C08K2201/011C08K2201/014C08L2201/02C08L2201/08C08L2312/00C08L23/06C08K13/06C08K9/08C08K3/346C08K3/22C08K5/14C08K5/549C08K5/5419
Inventor 陈东进
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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