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High-elongation two-component silicone structural adhesive and preparation method thereof

A high elongation, two-component technology, used in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of bonding and sealing, and the inability to use super high-rise glass building curtain wall structures.

Active Publication Date: 2016-01-20
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be concluded from the above materials that in the prior art, the elongation rate of silicone sealants can only reach 141% at the maximum tensile bonding strength at 23°C, and cannot be used for structural bonding and sealing of super high-rise glass building curtain walls.

Method used

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  • High-elongation two-component silicone structural adhesive and preparation method thereof
  • High-elongation two-component silicone structural adhesive and preparation method thereof
  • High-elongation two-component silicone structural adhesive and preparation method thereof

Examples

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preparation example Construction

[0041] The embodiment of the present invention also provides a method for preparing the above-mentioned high-elongation two-component silicone structural adhesive, which includes the following steps:

[0042] Prepare component A and component B, the sequence of preparing component A and component B is not limited, component A can be prepared first, component B can be prepared first, component A and component B can also be prepared at the same time;

[0043] The preparation process of component A is as follows:

[0044] In terms of parts by mass, input the ratio of 40-100 parts of base polymer, 40-80 parts of nano-calcium carbonate, 0.5-2 parts of ultraviolet absorber, and 5-10 parts of polydimethylsiloxane into twin-screw extrusion Machine control system, electronic metering of feeding amount, feeding, production through twin-screw extruder, control vacuum degree in the production process to -0.07 ~ -0.09MPa, material temperature 80 ° C ~ 100 ° C, to obtain A component;

[00...

Embodiment 1

[0065] The high-elongation two-component silicone structural adhesive provided in this example includes components A and B, in parts by mass, and component A includes 90 parts of α, ω-dihydroxy polydimethylsiloxane alkane, 50 parts of nano-calcium carbonate, 1 part of benzotriazole UV stabilizer, 5 parts of polydimethylsiloxane; component B includes 50 parts of color paste, 10 parts of methyldimethoxysilyl poly Propylene oxide ether, 0.5 parts of p-toluenesulfonyl isocyanate, 40 parts of methyltriethoxysilane, 30 parts of γ-aminopropyltriethoxysilane, 10 parts of mercaptopropyltrimethoxysilane, 0.2 parts of dibutyl Tin dilaurate, wherein the color paste includes: 100 parts of polydimethylsiloxane, 50 parts of high-structure carbon black, 5 parts of fumed silica; components A and B are mixed in a mass ratio of 9:1.

[0066] The preparation method of the above-mentioned high-elongation two-component silicone structural adhesive comprises the following steps:

[0067] Preparatio...

Embodiment 2

[0071] The high-elongation two-component silicone structural adhesive provided in this example includes components A and B, in parts by mass, and component A includes 100 parts of α, ω-dihydroxy polydimethylsiloxane alkane, 80 parts of nano-calcium carbonate, 2 parts of benzotriazole UV stabilizer, 10 parts of polydimethylsiloxane; component B includes 100 parts of color paste, 23 parts of trimethoxysilyl polyoxypropylene ether , 0.7 parts of vinyltrimethoxysilane, 80 parts of methyltrimethoxysilane, 30 parts of γ-aminopropyltriethoxysilane, 20 parts of γ-(2,3-epoxypropoxy)propyl trimethyl Oxysilane, 3 parts of dioctyltin dilaurate, the color paste includes: 100 parts of polydimethylsiloxane, 50 parts of high structure carbon black, 5 parts of fumed silica; A component, B component Mix according to the mass ratio of 13:1.

[0072] The preparation method of the above-mentioned high-elongation two-component silicone structural adhesive comprises the following steps:

[0073] P...

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Abstract

The invention belongs to the field of two-component silicone structural adhesives, and particularly relates to a high-elongation two-component silicone structural adhesive and a preparation method thereof. The silicone structural adhesive comprises a component A and a component B; the component A comprises, by mass, 40-100 parts of basic polymers, 40-80 parts of nano calcium carbonate, 0.5-2 parts of ultraviolet light absorber and 5-10 parts of polydimethylsiloxane; the component B comprises, by mass, 40-100 parts of color paste, 5-25 parts of silane modified polymers, 0.5-2 parts of dewatering agents, 40-80 parts of cross-linking agents, 10-50 parts of coupling agents, 0.2-3 parts of organic bismuth catalysts, wherein the color paste comprises 100 parts of polydimethylsiloxane, 50 parts of high structure carbon black and 5 parts of gas-phase white carbon black; the component A is mixed with the component B according to the mass ratio ranging from 7:1 to 14:1. The silane modified polymers are added to the silicone structural adhesive, the elongation at the maximum tensile bonding strength can be effectively increased, and the high-elongation two-component silicone structural adhesive is suitable for structural bonding and sealing of super high-rise glass building curtain walls.

Description

technical field [0001] The invention relates to the field of two-component silicone structural adhesives, in particular to a high-elongation two-component silicone structural adhesive and a preparation method thereof. Background technique [0002] The glass building curtain wall organically integrates the practical functions such as wind protection, rain shelter, heat preservation, heat insulation, and cold protection of the building's peripheral structure with decorative functions. It is a complex of architectural technology, architectural functions and architectural art, and has been widely used in the world. . [0003] The development of glass building curtain walls is inseparable from the development of silicone structural adhesives. Silicone structural adhesives are widely used in the structural bonding and sealing of glass building curtain walls because of their high and low temperature resistance, weather aging resistance, ozone resistance, good adhesion to various s...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/08C09J11/06C09J11/04
Inventor 王翠花李万华李华伟赵勇刚刘鹏
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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