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Immersion-resistant single-component deacidified organic silicon sealant composition and preparation method thereof

A composition and silicone technology, applied in chemical instruments and methods, adhesives, adhesive additives, etc., can solve the problems of small displacement capacity, water leakage, failure to achieve air tightness, water tightness, etc.

Active Publication Date: 2016-02-03
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its high strength, low elongation, and small displacement capacity, silicone weather-resistant adhesive is easy to be pulled and cracked, which can easily cause seal failure and water leakage; Due to the addition of a large amount of non-silicone plasticizers, on the one hand, it will affect the adhesion between the sealant and the substrate, and on the other hand, such plasticizers will migrate slowly over time, increasing the shrinkage stress of the sealant itself. large, and lead to bonding damage, which eventually leads to serious cracking and water leakage at the joints of the bonded substrate plates, failing to meet the requirements of air and water tightness, increasing maintenance costs, and causing waste of materials and social resources
[0005] In view of the fact that there is no silicone adhesive sealing material specially used for joint sealing in the field of building waterproofing on the market

Method used

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  • Immersion-resistant single-component deacidified organic silicon sealant composition and preparation method thereof
  • Immersion-resistant single-component deacidified organic silicon sealant composition and preparation method thereof
  • Immersion-resistant single-component deacidified organic silicon sealant composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: 50 parts by mass of α with a viscosity of 10000mPa·s, and 50 parts by mass of ω-dihydroxypolydimethylsiloxane with a viscosity of 50000mPa·s, 50 parts by mass of ω-dihydroxypolydimethylsiloxane , specific surface area 200m 2 20 parts by mass of fumed silica per g, 20 parts by mass of polydimethylsiloxane with a viscosity of 100 mPa·s, 3 parts by mass of methyltriacetoxysilane, and 5 parts by mass of dimethyldiacetoxysilane Add it into a mixer, stir and mix for 60 minutes under a vacuum of 0.06MPa; add 0.05 parts by mass of dibutyltin dilaurate, 0.05 parts by mass of stannous octoate, 0.1 parts by mass of butyl titanate, and 2 parts by mass of dodecyltrimethoxysilane Parts, 3 parts by mass of hexadecyltrimethoxysilane, the structural formula is Add 0.2 parts by mass of the tackifier to the mixer, stir and mix for 60 minutes at a temperature of 30°C and a vacuum of 0.085 MPa to obtain a water-resistant one-component deacidification type silicone sealant compo...

Embodiment 2

[0080] Example 2: 30 parts by mass of α with a viscosity of 5000mPa·s, 30 parts by mass of ω-dihydroxypolydimethylsiloxane and 30 parts by mass of α with a viscosity of 20000mPa·s , 40 parts by mass of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 80000mPa·s, and a specific surface area of ​​50m 2 5 parts by mass of fumed silica per g, 10 parts by mass of polydimethylsiloxane with a viscosity of 500mPa·s, 1 part by mass of ethyltriacetoxysilane, and 4 parts by mass of vinyltriacetoxysilane In a mixer, stir and mix for 80 minutes under a vacuum of 0.085 MPa; 0.03 parts by mass of dibutyltin diacetate, 1 part by mass of octyltriethoxysilane, and 1 part by mass of hexadecyltrimethoxysilane, the structural formula is Add 1 mass part of the tackifier to the mixer, stir and mix for 90 minutes at a temperature of 20°C and a vacuum of 0.09MPa to obtain a water-resistant one-component deacidification type silicone sealant composition. The test results of product performance a...

Embodiment 3

[0083] Example 3: 100 parts by mass of α, ω-dihydroxypolydimethylsiloxane with a specific surface area of ​​100 m 2 30 parts by mass of fumed silica per g, 25 parts by mass of polydimethylsiloxane with a viscosity of 200mPa·s, 4 parts by mass of methyltriacetoxysilane, 4 parts by mass of ethyltriacetoxysilane, Add 4 parts by mass of di-tert-butoxydiacetoxysilane into the mixer, and stir and mix for 30 minutes under a vacuum of 0.09 MPa; 0.1 part by mass of dibutyltin dioctoate, 0.1 part by mass of butyl titanate, 0.3 parts by mass of propyl ester, 1 part by mass of octyltrimethoxysilane, and the structural formula is Add 0.5 parts by mass of the tackifier to the mixer, stir and mix for 45 minutes at a temperature of 40°C and a vacuum of 0.08MPa to obtain a water-resistant one-component deacidification type silicone sealant composition. The test results of product performance are shown in the table. 1.

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Abstract

The invention discloses an immersion-resistant single-component deacidified organic silicon sealant composition and a preparation method thereof. The composition comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, 5-50 parts of fumed silica, 10-30 parts of polydimethylsiloxane, 5-15 parts of a crosslinking agent, 0.01-0.5 part of a catalyst, 1-5 parts of a waterproof agent and 0.1-1 part of a tackifier. The single-component deacidified organic silicon sealant has excellent adhesive property, and the safety and stability of the single-component deacidified organic silicon sealant in the using process are ensured; and the single-component deacidified organic silicon sealant still has excellent adhesive property with a base material after being subjected to long-term immersion or short-term high-temperature boiling treatment and is high in mechanical property retention rate and better in waterproofness as comparison with a common silicone sealant.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a water-resistant one-component deacidification type silicone sealant composition and a preparation method thereof. Background technique [0002] With the rapid development of urbanization, industries such as modern construction, amusement, and home decoration have put forward higher requirements for the performance of various construction and decoration materials. Many materials need to work in the water environment for a long time, and their long-term immersion resistance and bonding performance are very high, such as the seam sealing material for the glass lighting roof of the underwater corridor, and the bonding sealing material between the glass surfaces of the inner wall of the aquarium or aquarium , Seam sealing materials for sanitary ware such as bathrooms and toilets, etc. [0003] Sealant is a kind of material used to fill the configuration gap to play the role of bondin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09J11/08C09K3/10
Inventor 毛俊轩李文辉潘林车国勇熊婷王有治
Owner CHENGDU GUIBAO SCI & TECH
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