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Organic silicone coated adhesive and preparation method and application thereof

A technology of coating glue and silicone, applied in the direction of adhesives, etc., can solve the problems of slow curing speed, poor storage stability, easy yellowing, etc., and achieve the effect of fast curing speed, stable performance and good resistance to yellowing.

Active Publication Date: 2016-05-18
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic products of this type use organotin as the catalyst, and a small amount of products using titanate catalysts cannot be promoted due to slow curing speed, easy yellowing, and poor storage stability.

Method used

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  • Organic silicone coated adhesive and preparation method and application thereof
  • Organic silicone coated adhesive and preparation method and application thereof
  • Organic silicone coated adhesive and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, the silicone coating glue contains the following components by weight:

[0047]

[0048] Its preparation method specifically comprises the following steps:

[0049] (1) Add dimethoxy-terminated polydimethylsiloxane, trimethoxy-terminated polydimethylsiloxane, and epoxy-grouped polydimethylsiloxane to a dynamic mixer, Vacuumize until the vacuum degree is -0.09MPa, stir for 10min;

[0050] (2) Add crosslinking agent (methyl orthosilicate), catalyst (tetraisopropyl titanate) and tackifier (silane coupling agent with epoxy group) successively in the mixture obtained in step (1), After each substance is added, vacuumize to -0.09MPa, and stir for 10 minutes until the last substance is added and mixed evenly, then discharged, packaged, and silicone coating rubber is obtained.

Embodiment 2

[0052] In this embodiment, the silicone coating glue contains the following components by weight:

[0053]

[0054] Its preparation method specifically comprises the following steps:

[0055] (1) Add dimethoxy-terminated polydimethylsiloxane, trimethoxy-terminated polydimethylsiloxane, and epoxy-grouped polydimethylsiloxane to a dynamic mixer, Vacuumize until the vacuum degree is -0.1MPa, stir for 30min;

[0056] (2) Add crosslinking agent (methyltrimethoxysilane) and catalyst (tetrabutyl titanate) to the mixture obtained in step (1) in sequence, and vacuumize to -0.1MPa after each substance is added , stirred for 20 minutes, until the last substance was added and mixed evenly, then discharged, packaged, and silicone coating glue was obtained.

Embodiment 3

[0058] In this embodiment, the silicone coating glue contains the following components by weight:

[0059]

[0060]

[0061] Its preparation method specifically comprises the following steps:

[0062] (1) Add dimethoxy-terminated polydimethylsiloxane, trimethoxy-terminated polydimethylsiloxane, and epoxy-grouped polydimethylsiloxane to a dynamic mixer, Vacuumize until the vacuum degree is -0.097MPa, stir for 20min;

[0063] (2) Add crosslinking agent (vinyltrimethoxysilane), catalyst (tetrabutyl titanate) and tackifier (silane coupling agent with epoxy group) successively to the mixture obtained in step (1), After each substance is added, vacuumize to -0.095MPa, and stir for 30 minutes until the last substance is added and mixed evenly, then discharged, packaged, and silicone coating rubber is obtained.

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Abstract

The invention provides organic silicone coated adhesive and a preparation method and application thereof. The organic silicone coated adhesive is prepared from, by weight, 30-50 parts of dimethoxy terminated polydimethylsiloxane, 30-50 parts of triethoxy terminated polydimethylsiloxane, 30-50 parts of polydimethylsiloxane with an epoxy group, 1-6 parts of a cross-linking agent, 0.5-2 parts of a catalyst and 0.1-1 part of tackifier. The organic silicone coated adhesive has excellent comprehensive performance, viscosity is low (500-1000 dpas), the preparation process is free of peak viscosity, the organic silicone coated adhesive is resistant to a high temperature and a low temperature, can be used at the temperature ranging from minus 60 DEG C to 200 DEG C and can be heated and solidified, is high in solidification speed (surface drying time is less than 5 minutes at the temperature of 80 DEG C) and has high stability, and all properties scarcely change after the organic silicone coated adhesive is stored at the room temperature for one year.

Description

technical field [0001] The invention belongs to the field of organic silicon materials, and relates to an organic silicon coating glue and its preparation method and application. Background technique [0002] As a new type of material, adhesives have been continuously improved in performance, and have developed into a new subject in material science. Especially with the rapid development of electronic technology, adhesives for electronics have also achieved rapid development, thus was born Many adhesive products for electronic appliances are used in different fields. Due to the different application environments of electronic products, the damage they suffer is also different. In order to prevent various moisture and mold from invading the circuit board, a layer of paint is painted on the circuit board, and after it is completely cured, a thin film is formed and attached to the circuit board. , in order to achieve the effect of moisture-proof, waterproof, anti-corrosion and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06
CPCC08L2205/025C08L2205/03C09J183/06C08L83/06
Inventor 陈天广刘金明孙鹏翁祝强黄献文管艳茜
Owner 兆舜科技(广东)有限公司
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