A kind of silicone weather-resistant adhesive with high displacement capacity and preparation method thereof

A silicone weather-resistant adhesive and capability technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of insufficient displacement capacity, insufficient adhesion, and debonding of sealants, and achieve excellent expansion and contraction. The effect of recovery, excellent weathering resistance, good water resistance

Active Publication Date: 2021-02-09
GUANGZHOU GLORYSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a silicone weather-resistant adhesive with high displacement capacity for the problems of insufficient displacement capacity of the existing sealants, which are prone to debonding, fracture, and insufficient adhesion.

Method used

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  • A kind of silicone weather-resistant adhesive with high displacement capacity and preparation method thereof
  • A kind of silicone weather-resistant adhesive with high displacement capacity and preparation method thereof
  • A kind of silicone weather-resistant adhesive with high displacement capacity and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of silicone weather-resistant adhesive with high displacement capacity, comprising the following steps:

[0035] 1) Put 100 parts of hydroxyl-terminated polydimethylsiloxane and 100 parts of nano-calcium carbonate into a kneader, wherein the hydroxyl-terminated polydimethylsiloxane has a viscosity of 50000cP at 25°C, and the particles of nano-calcium carbonate The diameter is 30-80nm, heated to 100-120°C and kneaded for 2-3 hours under vacuum airtight conditions to obtain the base rubber;

[0036] 2) Vacuumize the cooled base compound for 10 minutes;

[0037] 3) Add 6 parts of chain extender methylvinyl diisopropenyloxysilane and 6 parts of crosslinking agent phenyl tributylketoxime silane to the above-mentioned base material, and mix for 20 minutes under vacuum;

[0038] 4) Add 0.1 part of chelated tin catalyst and 1 part of silane coupling agent (MeO) 3 SiC 3 h 6 NHC 3 h 6 Si(MeO) 3 , mixed for 30 minutes, and vacuum removed the air bubbles...

Embodiment 2

[0040] A preparation method of a high-displacement silicone weather-resistant adhesive is basically the same as in Example 1, except that the chain extender methylvinyldiisopropenyloxysilane is added in 4 parts.

Embodiment 3

[0042] A method for preparing a high-displacement capacity storage-stable silicone weather-resistant adhesive is basically the same as in Example 1, except that the number of chain extender methylvinyldiisopropenyloxysilane added is 2 parts.

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Abstract

The invention provides a high-displacement silicone weather-resistant adhesive and a preparation method thereof, which relate to the technical field of polymer sealing materials. The silicone weather-resistant adhesive of the present invention comprises the following components in parts by weight: 100 parts of polyorganosiloxane, 50-120 parts of filler, 1-10 parts of chain extender, 5-10 parts of crosslinking agent, silane coupling 1-5 parts of agent, 0.1-2 parts of catalyst. The preparation method of the present invention comprises the following steps: preparing base rubber; vacuumizing and stirring for 10-20 minutes; adding chain extender and crosslinking agent, and mixing for 10-30 minutes under vacuum airtight; adding silane coupling agent and catalyst, mixing After 10-30 minutes, the air bubbles are removed in a vacuum to obtain the silicone weather-resistant adhesive of the present invention. The silicone weather-resistant adhesive of the present invention has a displacement capacity of +100% and -50%, and has excellent weather aging resistance and high and low temperature resistance.

Description

technical field [0001] The invention relates to the technical field of polymer sealing materials, in particular to a silicone weather-resistant adhesive with high displacement capacity and a preparation method thereof. Background technique [0002] With the rapid development of my country's construction industry, there are more and more large-scale glass curtain walls and aluminum curtain wall projects. The problem of bonding and sealing of glass curtain walls and metal curtain walls has attracted great attention from the construction industry. It is required to further improve the displacement capacity and aging resistance of curtain wall joint materials. , water resistance, overall adhesion and strength. [0003] At present, the silicone sealing materials used in China mainly have a displacement capacity of 25 grades. For curtain walls with large panels, the current 25-grade sealant has insufficient displacement capacity, and is prone to problems such as debonding, fractur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/04C09J11/06C09J11/04
Inventor 程小莲黎耀钟何艺文莫万全胡新嵩夏文龙
Owner GUANGZHOU GLORYSTAR CHEM
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