Alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant and preparation method thereof

A technology of room temperature vulcanization and silicone, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems that silicone rubber cannot meet the requirements, and achieve excellent electrical properties, chemical inertness, and good adhesion The effect of sex and tightness

Inactive Publication Date: 2019-06-14
WUXI HITXINCHENG POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-component room temperature vulcanization (RTV) silicone rubber currently on the market cannot meet the requirements in GB4806.11-2016

Method used

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  • Alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant and preparation method thereof
  • Alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant and preparation method thereof
  • Alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 200g of 107 silicone rubber with a viscosity of 50000mPa·s, 100g of dimethyl silicone oil with a viscosity of 100mPa·s into the container, vacuumize and stir for 5-10 minutes, then add 18g of methyl mixed ketoximosilane, 9g of vinyl tributyl ketone Oxime silane and vacuumize and stir for 20-30 minutes, then add 15g of surface-treated fumed silica A380 into the planetary mixer and stir slowly until it is completely soaked, then vacuumize and stir for 30-60 minutes, then add 400g Surface-treated filler, 3g surface-treated carbon black, 2g hexamethyldisilazane, vacuum and stir for 60-90 minutes, and finally add 9g vinyl tributylketoximosilane, 4gKH560, 3gKH792, 0.4g di Dibutyltin laurate, vacuumed and stirred for 15-20 minutes, stirred evenly, discharged and filled into aluminum toothpaste tubes to seal tightly, that is, alcohol-resistant, acid-type room temperature vulcanized silicone sealant.

[0030] The prepared alcohol-resistant, acid-type room temperature vulcani...

Embodiment 2

[0033] Add 100g of 107 silicone rubber with a viscosity of 20000mPa·s, 100g of 107 silicone rubber with a viscosity of 50000mPa·s, and 100g of dimethyl silicone oil with a viscosity of 500mPa·s into the container, vacuumize and stir for 5-10 minutes, then add 25g of methyl tributyl Ketoxime silane, 10g vinyl tributylketoxime silane and vacuum stirring for 20 to 30 minutes, then add 7.5g of surface-treated fumed silica A380 into the planetary mixer and stir slowly until it is completely infiltrated, then vacuum Increase the stirring speed and stir for 30-60 minutes, then add 600g of surface-treated filler, 3g of surface-treated carbon black, 2g of butyl triethylsilylacetate, vacuumize and stir for 60-90 minutes, and finally add 10g of vinyl tributyl Ketoxime silane, 4g KH550, 1.5g KH792, 0.4g dialkyltin dihydroxy acid, vacuum and stir for 15-20 minutes, after stirring evenly, discharge the material and fill it in an aluminum toothpaste tube and seal it tightly, that is, alcohol ...

Embodiment 3

[0037]Add 200g of 107 silicone rubber with a viscosity of 20000mPa·s, 100g of dimethyl silicone oil with a viscosity of 1000mPa·s into the container, vacuumize and stir for 5-10 minutes, then add 25g of phenyltributylketoximosilane, 12.5g of vinyltrimethicone butanone oximinosilane and vacuumize and stir for 20-30 minutes, then add 25g of surface-treated fumed silica A380 into the planetary mixer and stir at a slow speed until it is completely infiltrated, then vacuumize and stir for 30-60 minutes at an accelerated stirring speed, then Add 700g of surface-treated filler, 3g of surface-treated carbon black, 2g of tris(6-isocyanatohexyl) isocyanate, vacuumize and stir for 60-90 minutes, and finally add 12.5g of vinyl tributylketoximosilane, 6g of KH550 , 1gKH792, 0.4g dialkyldiaryloxide tin, vacuum and stir for 15-20 minutes, after stirring evenly, discharge and fill in aluminum toothpaste tubes to seal tightly, that is, alcohol-resistant, acid-type room temperature vulcanized si...

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Abstract

The invention discloses an alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant and a preparation method thereof. The preparation method comprises the steps of: addingmetered silicone rubber and plasticizer into a container; conducting vacuumizing and stirring, adding a part of metered cross-linking agent and chain extender, and conducting vacuumizing and stirring;slowly stirring metered reinforcing filler subjected to surface treatment until the reinforcing filler is completely infiltrated, conducting vacuumizing, and accelerating the stirring speed; adding metered surface-treated filler, pigment and hydroxyl scavenger, and conducting vacuumizing and stirring; and finally adding remaining metered cross-linking agent, an adhesion promoter and a catalyst, conducting vacuumizing and stirring, so as to obtain the alcohol-resistant acid-resistant room-temperature vulcanized organic silicon sealant after the mixture is stirred to be uniform. With the adoption of the manner, the sealant has excellent electrical properties and chemical inertness, and has the properties of heat resistance, natural aging resistance, flame resistance, moisture resistance, air permeability and the like; and the sealant has good adhesion and sealing performance on various plastics such as PVC and ABS, glass and metal materials.

Description

technical field [0001] The invention relates to an alcohol-resistant, acid-type room temperature vulcanized silicone sealant and a preparation method thereof. Background technique [0002] Condensation type one-component room temperature vulcanization (RTV) silicone rubber is a kind of α, ω-dihydroxy polydimethylsiloxane (viscosity 500 ~ 100000) as the base polymer (commonly known as base rubber) and crosslinking agent, chain extender Agents, catalysts, fillers (including reinforcing fillers) and other characteristic additives are uniformly mixed in a moisture-proof mixer, and then packaged in a sealed cylinder or hose; when used, they are extruded from the package and exposed to the air moisture cross-linking vulcanization. No heat absorption or exotherm during curing, small shrinkage after curing, odorless and non-toxic after complete curing. It has good adhesion to various plastics, glass and metal materials such as PVC and ABS. It is mainly used in the bonding and sea...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06
Inventor 吴琳玲
Owner WUXI HITXINCHENG POLYMER TECH
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