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Dealcoholization type storage-resistant RTV electronic coating glue and preparation method thereof

A storage-resistant and dealcoholized technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of poor storage stability, strong copper corrosion, strong odor, etc., and achieve excellent weather resistance, Good adhesion and stability, no environmental pollution

Active Publication Date: 2017-12-26
CHENGDU GUIBAO NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of such products in the domestic market are deketoxime type electronic coating adhesives, which have a strong corrosion effect on copper and have a relatively large odor; while traditional dealcoholized RTV electronic coating adhesives With 107 glue as the base polymer, this kind of RTV silicone rubber has poor storage stability and is difficult to promote in the market

Method used

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  • Dealcoholization type storage-resistant RTV electronic coating glue and preparation method thereof
  • Dealcoholization type storage-resistant RTV electronic coating glue and preparation method thereof
  • Dealcoholization type storage-resistant RTV electronic coating glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] With 50 parts by mass of the base polymer (I) whose viscosity is 500mPa·s, its molecular formula is as follows:

[0048]

[0049] With 50 parts by mass of the base polymer (II) whose viscosity is 500mPa·s, its molecular formula is as follows:

[0050]

[0051]Put them into a high-speed disperser respectively, evacuate to -0.09MPa~-0.1MPa, and stir for 10min at a speed of 500r / min. Then, add 2 parts by mass of fumed white carbon black R972 after passing through nitrogen to evacuate, disperse at a speed of 500r / min for 5min, vacuumize to -0.09MPa~-0.1MPa, and then disperse at a speed of 2000r / min 15min. Then add 5 parts of methyltrimethoxysilane, 2 parts of γ-aminopropyltrimethoxysilane, and 1 part of tert-butyl titanate after nitrogen evacuation, and quickly evacuate to -0.09MPa~-0.1MPa, at 2000r / min Disperse evenly in a high-speed disperser at a rotating speed, and pack to prepare dealcoholized RTV electronic coating adhesive Ⅰ.

Embodiment 2

[0053] With 60 parts by mass viscosity of the base polymer (I) of 350mPa·s, its molecular formula is as follows:

[0054]

[0055] With 40 mass parts viscosity is the base polymer (II) of 1500mPa s, and its molecular formula is as follows:

[0056]

[0057] Put them into a high-speed disperser respectively, evacuate to -0.09MPa~-0.1MPa, and stir for 10min at a speed of 500r / min. Then, add 3 parts by mass of gas-phase process silica R974 after passing through nitrogen to evacuate, disperse at a speed of 500r / min for 5min, vacuumize to -0.09MPa~-0.1MPa, and then disperse at a speed of 2000r / min 15min. Then add 3 parts of vinyltrimethoxysilane, 1 part of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, and 1 part of tert-butyl titanate after nitrogen evacuation, and quickly evacuate to -0.09MPa ~-0.1MPa, disperse evenly in a high-speed disperser at 2000r / min, pack, and prepare dealcoholized RTV electronic coating adhesive II.

Embodiment 3

[0059] With 70 parts by mass of the base polymer (I) whose viscosity is 350mPa·s, its molecular formula is as follows:

[0060]

[0061] With 30 mass parts viscosity is the base polymer (II) of 1500mPa s, and its molecular formula is as follows:

[0062]

[0063] Put them into a high-speed disperser respectively, evacuate to -0.09MPa~-0.1MPa, and stir for 10min at a speed of 500r / min. Then, add 2.5 parts by mass of fumed white carbon black R974 after passing through nitrogen to evacuate, disperse at a speed of 500r / min for 5min, vacuumize to -0.09MPa~-0.1MPa, and then disperse at a speed of 2000r / min 15min. Then add 3 parts of vinyltrimethoxysilane, 1 part of γ-aminopropyltrimethoxysilane, and 1 part of tert-butyl titanate after nitrogen evacuation, and quickly evacuate to -0.09MPa~-0.1MPa, at 2000r / min Disperse evenly in a high-speed disperser at a rotating speed, and pack to prepare dealcoholized RTV electronic coating adhesive III.

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Abstract

The invention discloses dealcoholization type storage-resistant RTV electronic coating glue and a preparation method thereof. The electronic coating glue is prepared by mixing an alkoxy-terminated polysiloxane base polymer, an inorganic reinforcing filler, a polyalkoxy silane crosslinking agent, a silane coupling agent and a catalyst in a certain mass ratio, wherein the alkoxy-terminated polysiloxane base polymer is prepared by mixing a base polymer (I) with a base polymer (II). According to the dealcoholization type storage-resistant RTV electronic coating glue, the problem that dealcoholization type RTV electronic coating glue is poor in storage stability is solved; the preparation method is simple and feasible, and the glue is solvent-free and environment-friendly and has excellent flowability; and after being cured, the glue has very good electrical insulating property, tensile strength and transparency, has strong adhesion force to a PCB and can meet 'three-prevention' requirements of the PCB.

Description

technical field [0001] The invention relates to the technical field of RTV silicone rubber, in particular to a dealcoholized storage-resistant RTV electronic coating glue and a preparation method thereof. Background technique [0002] With the wide application and rapid development of electronic products in people's daily life, and being favored by people constantly, the market demand for electronic products increases accordingly. Effective protection of PCB electronic circuit boards is also receiving more and more attention. In order to prevent all kinds of moisture and mold from invading the circuit board, it is necessary to paint a layer of paint on the circuit board. After it is completely cured, a layer of film is formed and attached to the circuit board to achieve the effect of moisture-proof, waterproof, corrosion-proof and salt spray. Silicone rubber is widely used in the protection of PCB electronic circuit boards due to its excellent corrosion resistance, water re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06
CPCC08L2201/08C08L2201/10C08L2203/20C08L2205/025C09J11/04C09J11/06C09J183/06C08L83/06C08K13/02C08K3/36C08K5/5419C08K5/544C08K5/5435C08K5/5425
Inventor 陈贵荣陈良兵黄强王有治
Owner CHENGDU GUIBAO NEW MATERIAL
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