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Waterproof and moistureproof composition and its application

A composition and moisture-proof technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of not being able to obtain waterproof, moisture-proof effect, insufficient waterproof, moisture-proof performance, long drying and curing time, etc., to achieve excellent waterproof and moisture-proof performance and durability Chemical corrosion performance, improve chemical corrosion resistance, and enhance the effect of stability

Active Publication Date: 2021-03-02
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing waterproof and moisture-proof coating agents are formed by coating or curing organic solutions of resins or liquid resins, which take a long time to dry and cure, resulting in low production efficiency
In addition, these resins have insufficient waterproof and moisture-proof performance when the film thickness is thin. In order to improve the waterproof performance, it is necessary to thicken the coating. Thick coating also cannot obtain satisfactory waterproof and moisture-proof effects
[0004] On the other hand, intelligent electronic and electrical equipment will also be corroded by the acid or salt produced by the printed circuit board in rain or moisture, fog, sweat and other environments, resulting in short circuit damage

Method used

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  • Waterproof and moistureproof composition and its application
  • Waterproof and moistureproof composition and its application
  • Waterproof and moistureproof composition and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0079] According to some embodiments of the present invention, the preparation method of the DES modified unsaturated ester is as follows:

[0080] Stir and mix the hydrogen bond acceptor and hydrogen bond donor at a molar ratio of 1:1 at 80-100°C until a colorless homogeneous liquid is formed to obtain DES containing free hydroxyl or carboxyl groups; then mix it with The pre-esterification monomer is subjected to esterification reaction to obtain DES modified unsaturated ester.

[0081] (iii) Active siloxane

[0082] In order to enhance the abrasion resistance of the film formed by the composition, active siloxane can be added as a monomer component of the fluoropolymer. The active siloxane is a silane coupling agent having an unsaturated bond and at least one alkoxy group.

[0083] Preferably, the structure of the active siloxane is shown in formula (III):

[0084]

[0085] In formula (III), R 6 , R 7 and R 8 each independently is an alkyl or alkoxy group, and R 6 ...

Embodiment 1

[0149] Perfluorohexylethyl methacrylate / (ChCl / CA)=100 / 1.58 (weight ratio)

[0150] Add 25.73g perfluorohexylethyl methacrylate, 0.407g ChCl / CA, 0.70g vinyltriethoxysilane ("KH-151" for short) and 108g hydrofluoroether perfluorobutyl methyl ether ( That is, HFE 7100), nitrogen purge was carried out for 10 minutes, and heated to 70°C. 0.20 g of azobisisovaleronitrile was added thereto, and a crude product mixture was obtained after 4 hours of reaction. The crude product mixture was cooled to room temperature, and the crude product was washed several times with ethanol to precipitate the fluoropolymer, and the product in the lower layer was taken and dried under reduced pressure to obtain the fluoropolymer product.

[0151] The molecular weight of the above fluorine-containing polymer product was measured by GPC using a fluorine solvent [HFE 7100 / tetrahydrofuran=90 / 10 (weight)] as the eluent, and the weight average molecular weight was 24380.

[0152] Using HFE 7100 solvent to ...

Embodiment 2

[0154] Perfluorohexylethyl methacrylate / (ChCl / CA)=100 / 3.26 (weight ratio)

[0155] The amount of ChCl / CA unsaturated ester was changed to 0.839g, and the other steps were the same as in Example 1 to synthesize the fluorine-containing polymer. The weight average molecular weight of the polymer product obtained in this example was 69830.

[0156] Using HFE 7100 solvent to dilute the above-mentioned fluorine-containing polymer product to the HFE7100 solution with a specified concentration of 2%, is the waterproof and moisture-proof composition.

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Abstract

The invention discloses a waterproof and moisture-proof composition, which comprises a fluorine-containing polymer and a fluorine-based solvent. The polymerized monomer of the fluorine-containing polymer includes: perfluoroalkyl acrylate and deep eutectic solvent modified unsaturated ester. The composition can impart excellent waterproof and moisture-proof performance and chemical corrosion resistance to various substrates, and is particularly suitable for use as an electronic coating agent.

Description

technical field [0001] The present invention relates to a composition capable of imparting excellent waterproof and moisture-proof properties to various materials, and particularly relates to a composition capable of imparting excellent waterproof and moisture-proof functions to electronic components without impairing the functions of electronic components. Background technique [0002] With the increase in performance and miniaturization of electrical and electronic equipment, printed circuit boards on which electronic components such as semiconductor chips are mounted at a high density are assembled inside. These devices are sometimes used in environments with high humidity and, for those used outdoors, are sometimes in direct contact with moisture such as rain. When such moisture adheres to or accumulates on electronic components such as printed circuit boards, abnormal current flows and malfunctions occur. In particular, there is a problem that printed circuit boards on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/14C09D5/08C09D5/00
CPCC09D5/00C09D5/08C09D133/14C09D143/04
Inventor 李义涛王菊别文丰侯琴卿何鑫石玲
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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