Inner and outer synchronously cured double-component organic silicon pouring sealant and preparation method thereof

A silicone potting glue, two-component technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of poor bonding effect, unstable system, etc., and meet the bonding needs , Improve leveling and promote wettability

Inactive Publication Date: 2019-05-21
西卡(江苏)工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This poses new challenges to the use of potting adhesives. Generally speaking, the faster the room temperature cures, the more unstable the system and the worse the bonding effect.

Method used

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  • Inner and outer synchronously cured double-component organic silicon pouring sealant and preparation method thereof
  • Inner and outer synchronously cured double-component organic silicon pouring sealant and preparation method thereof
  • Inner and outer synchronously cured double-component organic silicon pouring sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature, 50 parts of 2000mPa·s α,ω-dihydroxy polydimethylsiloxane, 45 parts of aluminum hydroxide, 40 parts of aluminum oxide, 3 parts of titanium dioxide and 8 parts of methyl ethoxy were mixed and capped Add silicone oil into a 1000L high-speed stirring tank, stir in vacuum for 2 hours, the vacuum degree is -0.95MPa, then add 50 parts of 1000mPa·s α,ω-dihydroxy polydimethylsiloxane, 0.5 weight percent concentration after cooling to room temperature 85% methanol solution of silicone-modified thioether, mixed and stirred at high speed for 0.5h, and then vacuum defoamed to obtain component A; Parts of aminosilane oligomers were pre-reacted at 100°C for 1 hour, and after cooling to room temperature, 30 parts of polyethyl silicate, 20 parts of dimethyldiethoxysilane, 5 parts of KH-792 and 0.08 parts of dilaurel Add dioctyltin acid into the reactor, stir and mix under vacuum for 0.5h to obtain component B; mix the obtained component A and component B at a weight...

Embodiment 2

[0023] At room temperature, 50 parts of 1500mPa·s α,ω-dihydroxy polydimethylsiloxane, 40 parts of aluminum hydroxide, 40 parts of silicon micropowder, 5 parts of titanium dioxide and 10 parts of 350mPa·s dimethyl silicone oil Add it into a 1000L high-speed stirred tank, stir in vacuum for 2 hours, and the vacuum degree is -0.95MPa, then add 50 parts of 1500mPa·s α,ω-dihydroxy polydimethylsiloxane after cooling to room temperature, 1.5 parts by weight with a concentration of 75% methanol solution of silicone-modified thioether, mixed and stirred at high speed for 0.5h, and then vacuum degassed to obtain component A; 100 parts of silane-modified polyether resin with a viscosity of 600mPa·s, 7.5 parts of aminosilane oligomer in Pre-react at a temperature of 100°C for 0.5h, and after cooling to room temperature, mix 20 parts of tetraethoxysilane, 10 parts of methyltrimethoxysilane, 20 parts of dimethyldiethoxysilane, 7.5 parts of KH-540 and 0.05 Add two parts of dibutyltin dilaura...

Embodiment 3

[0029] Add 50 parts of 1500mPa·s α,ω-dihydroxy polydimethylsiloxane, 40 parts of light calcium carbonate, 30 parts of aluminum oxide and 1 part of hydroxyl silicone oil into a 1000L high-speed stirring tank at room temperature, and stir under vacuum for 1.5 h, the vacuum degree is -0.95MPa, then after cooling to room temperature, add 50 parts of α, ω-dihydroxypolydimethylsiloxane of 1500mPa·s, 2 parts by weight of 90% silicone modified sulfide Ethanol solution, mixed and stirred at high speed for 0.5h, and then vacuum degassed to obtain component A; 100 parts of silane-modified polyurethane resin with a viscosity of 800mPa·s and 5 parts of aminosilane oligomer were pre-reacted at 100°C for 0.5h, After cooling to room temperature, add 25 parts of polyethylsilicate, 15 parts of dimethyldiethoxysilane, 5 parts of KH-792 and 0.1 part of dioctyltin dicaprate into the reactor, and stir and mix under vacuum for 0.5h Obtain component B; mix the obtained component A and component B at ...

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PUM

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Abstract

The invention discloses an inner and outer synchronously cured double-component organic silicon pouring sealant which comprises a component A and a component B in a weight ratio of (5.5-6.5):1, wherein the component A comprises the following components in parts by weight: 100 parts of alpha,omega-dyhydroxy polydimethyl siloxane, 20-90 parts of a filler, 1-20 parts of a plasticizer, 0.5-5 parts ofa curing promoter and 0-10 parts of a pigment; the component B comprises the following components in parts by weight: 100 parts of a curing agent carrier, 40-60 parts of a silane cross-linking agent,10-20 parts of a silane coupling adhesion promoter and 0.05-1 part of a catalyst; the curing promoter is an organic silicon modified thioether alcohol solution; the weight percentage concentration ofthe organic silicon modified thioether alcohol solution is 60-90%. The invention further discloses a preparation method of the inner and outer synchronously cured double-component organic silicon pouring sealant. The double-component organic silicon pouring sealant disclosed by the invention has the advantages of being simple in production process, feasible in inner and outer synchronously curing,wide in adhesion range, excellent in storage property, and the like, and can be applied to sealing of structures with complex inner structures and relatively rich micro-pore structures.

Description

technical field [0001] The invention relates to a silicone potting glue and a preparation method thereof, in particular to a two-component silicone potting glue with internal and external simultaneous curing and a preparation method thereof. Background technique [0002] The curing principle of silicone potting glue: Silicone glue absorbs moisture in the air to undergo a chemical reaction, and gradually solidifies from the surface to the inside. Within a certain range, the higher the temperature and humidity, the faster the curing speed. The climate in winter is generally cold and dry, with low temperature and low humidity. The climate conditions are extremely unfavorable for the curing of glue, and the odor volatilizes slowly. This poses new challenges to the use of potting adhesives. Generally speaking, the faster the room temperature cures, the more unstable the system and the worse the bonding effect. Contents of the invention [0003] Aiming at the deficiencies of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/06
Inventor 段理垒张建忠唐开明荀佳伟
Owner 西卡(江苏)工业材料有限公司
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