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Airtight protective coating and preparation method thereof

A protective coating and airtight technology, applied in coatings, epoxy resin coatings, primers, etc., can solve the problems of poor adhesion to the substrate at the welding point, poor airtightness of the sealed cabin, and poor sealing effect , to achieve the effect of simple construction operation, easy construction and good adhesion effect

Active Publication Date: 2021-03-16
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most aluminum alloy cabins are usually spliced ​​by welding, and there will be weld pores in the welded part due to process factors, which makes the airtightness of the sealed cabin poor. At present, the means of airtight protection usually use sealant or A layer of ceramic-based airtight protective material is applied by thermal spraying. The serious disadvantage of this method is that it has poor adhesion to the substrate at the welding point, and the sealing effect is not good, and the construction requires high temperature heating, which is more complicated.

Method used

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  • Airtight protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Airtight protective primer

[0036] A1 component

[0037] a. Add 12 parts of epoxy resin E-12 and 36 parts of E-44 to 32 parts of xylene and 16 parts of n-butanol mixture, and disperse at a high speed of 1200 rpm for 15 minutes to obtain a resin dispersion;

[0038] b. Add 0.5 parts of BYK-A530, 0.5 parts of BYK-054, 0.5 parts of BYK-358N, and 0.5 parts of BYK-320 into the prepared resin dispersion, stir well and finally add 2 parts of A187, and disperse at high speed for 15 minutes at 1200rpm , to get the A1 component.

[0039] B1 component

[0040] Add 30 parts of polyamide resin 140 and 40 parts of modified cashew nut shell oil phenalkamide resin 3117 into a mixture of 24 parts of xylene and 6 parts of n-butanol, and disperse at a high speed of 1200 rpm for 15 minutes to obtain component B1.

[0041] When in use, mix components A1 and B1 at a mass ratio of 4:1 to make a sample.

[0042] (2) Airtight protective topcoat

[0043] (1) Modified polyaspartic acid ...

Embodiment 2

[0054] (1) Airtight protective primer

[0055] A1 component

[0056] a. Add 10 parts of epoxy resin E-12 and 40 parts of E-44 to 36 parts of xylene and 10 parts of n-butanol mixture, and disperse at a high speed of 1200 rpm for 15 minutes to obtain a resin dispersion;

[0057] b. Add 0.5 parts of BYK-A530, 0.5 parts of BYK-054, 0.5 parts of BYK-358N, and 0.5 parts of BYK-320 into the prepared resin dispersion, stir well and finally add 2 parts of A187, and disperse at high speed for 15 minutes at 1200rpm , to get the A1 component.

[0058] B1 component

[0059] Add 25 parts of polyamide resin 140 and 45 parts of modified cashew nut shell oil phenolic amide resin 3117 to a mixture of 24 parts of xylene and 6 parts of n-butanol, and disperse at high speed for 15 minutes at 1200 rpm to obtain component B1.

[0060] When in use, mix components A1 and B1 at a mass ratio of 4:1 to make a sample.

[0061] (2) Airtight protective topcoat

[0062] (1) Modified polyaspartic acid es...

Embodiment 3

[0073] (1) Airtight protective primer

[0074] A1 component

[0075] a. Add 8 parts of epoxy resin E-12 and 40 parts of E-44 to 32 parts of xylene and 16 parts of n-butanol mixture, and disperse at a high speed of 1200 rpm for 15 minutes to obtain a resin dispersion;

[0076] b. Add 0.5 parts of BYK-A530, 0.5 parts of BYK-054, 0.5 parts of BYK-358N, and 0.5 parts of BYK-320 into the prepared resin dispersion, stir well and finally add 2 parts of A187, and disperse at high speed for 15 minutes at 1200rpm , to get the A1 component.

[0077] B1 component

[0078] Add 20 parts of polyamide resin 140 and 50 parts of modified cashew nut shell oil phenalkamide resin 3117 into a mixture of 24 parts of xylene and 6 parts of n-butanol, and disperse at high speed for 15 minutes at 1200 rpm to obtain component B1.

[0079] When in use, mix components A1 and B1 at a mass ratio of 4:1 to make a sample.

[0080] (2) Airtight protective topcoat

[0081] (1) Modified polyaspartic acid est...

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Abstract

The invention discloses an airtight protective coating and further discloses a preparation method of the airtight protective coating. The provided airtight protective coating mainly plays a role in bonding, can effectively improve the adhesive force of organic macromolecules on an aluminum alloy cabin and a weld joint, can achieve the adhesive force of more than 4Mpa, can be used for connecting airtight protective finish paint, is high in solid content and crosslinking density, can form a layer of compact paint film on the airtight protective primer, and has the gas sealing and anti-leakage effects. E-12 and E-44 are compounded to form the airtight protective coating, the airtight protective coating is good in adhesion effect and has a certain sealing effect, and polyamide and cashew nut shell oil phenolic aldehyde amide resin are matched to serve as a curing agent, so that the reaction activity and the toughness of a cured product can be improved. The airtight protective finish paintis prepared from polyaspartic acid ester resin, a paint film is more compact after the modified resin, an elastic curing agent and HDI tripolymer are made into a film, and the coating is high in solidcontent, low in viscosity and easy to construct.

Description

technical field [0001] The invention relates to the field of airtight protective materials, in particular to an airtight protective coating and a preparation method thereof. Background technique [0002] At present, most aluminum alloy cabins are usually spliced ​​by welding, and there will be weld pores in the welded part due to process factors, which makes the airtightness of the sealed cabin poor. At present, the means of airtight protection usually use sealant or A layer of ceramic-based airtight protective material is applied by thermal spraying. The serious disadvantage of this method is that it has poor adhesion to the substrate at the welding point, and the sealing effect is not good, and the construction requires high temperature heating, which is more complicated. At present, there is no related technology of using an organic polymer coating for airtight protection. The present invention prepares an airtight protective coating by improving the compactness of the or...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D5/00C08G59/62C08G59/46C09D179/00C09D7/63C08G73/00
CPCC09D163/00C09D5/002C08G59/46C08G59/621C09D179/00C09D7/63C08G73/00C08L2201/14C08L2205/025C08L63/00C08K5/34924C08K5/29
Inventor 杨艺聪张文波徐常利文敬
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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