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Organosilicon three-proofing adhesive and preparation method and application thereof

A technology of three-proof glue and silicone, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor tear resistance, complicated production process, high production cost, etc., and achieve fast curing speed , the preparation method is simple, the effect of low cost

Active Publication Date: 2019-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has disadvantages such as slow curing speed, complex production process, high production cost, need to be used in combination with organic solvents, low adhesive performance, poor tear resistance, etc., which severely limits the large-scale application of silicone coating adhesives.

Method used

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  • Organosilicon three-proofing adhesive and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a silicone conformal adhesive and a preparation method thereof.

[0036] A silicone conformal adhesive, which consists of the following raw materials in terms of mass percentage: terminal group hydrogen-containing silicone oil crosslinking agent 14%, vinyl MQ resin 70%, tackifier 5%, inhibitor 3% and terminal vinyl group 8% silicone oil, the total mass of the above-mentioned raw materials is 100%; in addition, a platinum catalyst (Castel catalyst) with a mass of 5 ppm is added.

[0037] The preparation method is as follows:

[0038] (1) Preparation of the vinyl component: Mix 8g of terminal vinyl silicone oil and 70g of liquid vinyl MQ resin with a vinyl content of 2.4%, stir evenly, react at 110°C and cool to room temperature, then add 5g of Adhesive vinylmethyldimethoxysilane, to obtain a clear and transparent vinyl component;

[0039] (2) Preparation of three anti-adhesive glue: the vinyl component obtained in step (1), 3g inhibitor 1-ethyn...

Embodiment 2

[0041] For the preparation of one-component, fast-curing, solvent-free silicone conformal adhesive:

[0042] A silicone conformal adhesive, which is composed of the following raw materials in terms of mass percentage: 9% of terminal group hydrogen-containing silicone oil crosslinking agent, 2% of fumed silica, 68% of vinyl MQ resin, 5% of tackifier, inhibitor 0.006% of platinum catalyst (Castel catalyst) and 13% of vinyl-terminated silicone oil with a mass concentration of 5-50ppm, the mass concentration of the above-mentioned raw materials is 100%; in addition, a platinum catalyst (Castel catalyst) of 50ppm in mass concentration is added. ).

[0043] The preparation method is as follows:

[0044] (1) Preparation of the vinyl component: Mix 13g of terminal vinyl silicone oil and 68g of liquid vinyl MQ resin with a vinyl content of 2.0%, add 2g of fumed silica in batches, stir evenly, and heat at 110°C Cool to room temperature after the reaction, then add 5g tackifier vinyltr...

Embodiment 3

[0047] For the preparation of one-component, fast-curing, solvent-free silicone conformal adhesive:

[0048] A silicone conformal adhesive, which is composed of the following raw materials in terms of mass percentage: 12% of terminal group hydrogen-containing silicone oil crosslinking agent, 2% of fumed silica, 73% of vinyl MQ resin, 1% of tackifier, inhibitor Agent 1% and vinyl-terminated silicone oil 11%, the total quality of the above-mentioned raw materials is 100%; in addition, a platinum catalyst (Caster catalyst) with a material quality of 25ppm is added.

[0049] The preparation method is as follows:

[0050] (1) Preparation of the vinyl component: Mix 11g of terminal vinyl silicone oil with 73g of liquid vinyl MQ resin with a vinyl content of 1.8%, add 2g of fumed silica in batches, stir evenly, and heat at 110°C Cool to room temperature after the reaction, and then add 1g of tackifier vinyltriethoxysilane to obtain a clear and transparent vinyl component;

[0051] (2...

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Abstract

The invention belongs to the technical field of preparation of a three-proofing adhesive, and particularly relates to an organosilicon three-proofing adhesive and a preparation method and applicationthereof. The organosilicon three-proofing adhesive comprises the following raw materials: a terminal hydrogen-containing silicone oil crosslinking agent, fumed silica, vinyl MQ resin, a tackifier, aninhibitor, a platinum catalyst and vinyl-terminated silicone oil. Types of required raw materials are few, the cost is low, and the preparation method is simple; organic solvents do not need to be added in a preparation process, and the obtained three-proofing adhesive is nontoxic and harmless and meets the national environmental protection requirement; the curing speed of the three-proofing adhesive is high, and the three-proofing adhesive can be cured within 80 min at the normal temperature; and the three-proofing adhesive is cured within 20 min in an oven at the temperature of 80 DEG C. Ina curing process of the three-proofing adhesive, the surface drying time of a film is 1-4 min, the hardness of the cured film is 29-47 shore A, and the peeling strength is 1.2-2.8 N / mm. The obtained adhesive film can protect a device from being corroded by a bad environment, waterproof, dustproof and anticorrosive effects are achieved, the working stability and reliability of electronic componentsare improved effectively, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of three-proof glue preparation, and in particular relates to a silicone three-proof glue and its preparation method and application. Background technique [0002] In the fields of electronics, electrical engineering and electrical appliances, in order to protect devices from environmental erosion, people usually coat the surface of circuit boards, electronic components and electrical modules with three anti-adhesives, also known as coated adhesive products; Layer transparent protective film, with superior insulation, moisture-proof, leakage-proof, shock-proof, dust-proof, anti-vulcanization, anti-salt spray, anti-corrosion, anti-aging, corona resistance and other properties. At present, the three anti-adhesive products used in industry mainly include three types: silicone, polyurethane and acrylic. Among them, silicone-based conformal adhesive products have excellent properties such as high and low tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J11/06C09J11/08C09J11/04
Inventor 潘朝群
Owner SOUTH CHINA UNIV OF TECH
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