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A silane coupling agent hydrolyzate and its application in polyaniline attapulgite nanocomposite coating

A silane coupling agent, attapulgite technology, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, dyed organosilicon compound treatment, etc., can solve the problems of low stability reactivity, poor reactivity stability, etc. , stabilize the reactivity, improve the effect of wetting and dispersing

Active Publication Date: 2018-02-13
JIANGSU ZHONGTU PAINT DETECTION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to improve the dispersibility of polyaniline substances in the resin coating. In the technology, the hydrolyzate of silane coupling agent has the problem of "high reactivity, poor stability; high stability, low reactivity". The hydrolyzate proposed by the present invention includes the following components in parts by weight:

Method used

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  • A silane coupling agent hydrolyzate and its application in polyaniline attapulgite nanocomposite coating
  • A silane coupling agent hydrolyzate and its application in polyaniline attapulgite nanocomposite coating
  • A silane coupling agent hydrolyzate and its application in polyaniline attapulgite nanocomposite coating

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preparation example Construction

[0037] (1) Preparation of attapulgite slurry: add attapulgite raw material to deionized water to make a slurry whose quality of attapulgite accounts for 20% of the mass of deionized water;

[0038] (2) Preparation of inorganic acid-doped polyaniline / attapulgite nano-conductive composite material: under the condition of constant stirring, add aniline monomer to the above slurry, the quality of aniline monomer accounts for 40% of the attapulgite quality, Add inorganic acid to the slurry again, the molar ratio of inorganic acid to aniline monomer is 10:1, then slowly drop into the above slurry a solution of oxidizing agent with a concentration of 1.2mol / L, the molar ratio of oxidizing agent to aniline monomer 0.5:1, oxidative polymerization for 12 hours, polymerization temperature is 45°C;

[0039] (3) De-doping of inorganic acid-doped polyaniline / attapulgite nano-conductive composite material: the polyaniline / attapulgite nano-conductive composite material doped with inorganic ac...

Embodiment 1

[0052] Calculated in parts by weight:

[0053] (1) Add 9.4 parts of deionized water, 50 parts of methanol, and 15 parts of isopropanol into the reaction kettle, then add 0.2 parts of acetic acid, 0.2 parts of tartaric acid and 0.2 parts of nonionic surfactant TX-10, and stir well Obtain alcohol aqueous solution;

[0054] (2) Slowly add 20 parts of trimethoxysilane dropwise to the aqueous alcohol solution in step (1) under stirring at 25°C and 60 rpm, and continue to stir and hydrolyze at 25°C for 60 minutes after the dropwise addition;

[0055] (3) Slowly add 5 parts of 3-glycidyl etheroxypropyl trimethoxysilane dropwise to the system obtained in step (2) under the stirring state of 25°C and 60rpm. Stir and hydrolyze for 30 minutes to prepare a coupling agent hydrolyzate, which can be placed stably for 48 hours (25°C);

[0056] Put the polyaniline / attapulgite nanomaterial prepared above into a solid mixer, and spray the coupling agent hydrolyzate prepared in this embodiment,...

Embodiment 2

[0059] Calculated in parts by weight:

[0060] (1) Add 7.5 parts of deionized water, 50 parts of ethanol, and 15 parts of isopropanol into the reaction kettle, then add 0.5 parts of nonionic surfactant TX-10, and stir evenly to obtain an aqueous alcohol solution;

[0061] (2) Slowly add 20 parts of vinyltriethoxysilane dropwise to the aqueous alcohol solution in step (1) under stirring at 25°C and 60 rpm, and continue to stir and hydrolyze at 25°C for 60 minutes after the dropwise addition;

[0062] (3) Slowly add 7 parts of γ-aminopropylmethyldiethoxysilane dropwise to the system obtained in step (2) under the stirring state of 25°C and 60rpm. Stir and hydrolyze for 30 minutes to prepare a coupling agent hydrolyzate, which can be placed stably for 48 hours (25°C);

[0063] Put the polyaniline / attapulgite nanomaterial prepared above into a solid mixer, and spray the coupling agent hydrolyzate prepared in this embodiment, which accounts for 2% by weight of the nanomaterial, on...

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Abstract

The invention belongs to the field of preparation of coatings, in particular to a coupling agent hydrolysate for surface modification of polyaniline / attapulgite filling material and application of the hydrolysate. By modifying the silane coupling agent hydrolysate, it is possible to well control hydrolytic reaction of two silane coupling agents to obtain hydrolysate stable and high in reactive activity; by preparing an anticorrosive coating via the polyaniline / attapulgite nano material treated with the silane coupling agent hydrolysate, it is possible to improve moisturizing dispersion of the polyaniline / attapulgite nano material in the coating so that mechanical properties of the composite coating such as corrosion resistance and adhesion are greatly improved, and it is also possible to effectively increase the solid content of the coating and reduce VOC (volatile organic compounds).

Description

technical field [0001] The invention belongs to the field of paint preparation, in particular to a coupling agent hydrolyzate used for surface modification of polyaniline / attapulgite filler and application thereof. Background technique [0002] The polyaniline / attapulgite nano-conductive composite material prepared by using nano-attapulgite as the nucleus has been widely used as an excellent anti-rust additive in anti-corrosion coatings. There are two main methods for preparing polyaniline composite anticorrosion coatings: one is to coat the polyaniline coating with a topcoat to form a composite coating with polyaniline. The advantage of this technology is that there is no need to consider the dispersion of polyaniline in the coating, and each coating functions independently: the topcoat layer generally acts as a physical shield, and the polyaniline coating can increase the corrosion potential of steel and reduce the corrosion rate; However, since various coatings need to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D179/02C09D7/63C09D5/08C09C1/42C09C3/12C09C3/08C09C3/10
CPCC01P2004/60C08K2201/011C09C1/42C09C3/006C09D5/08C09D7/61C09D7/62C09D7/63C09D175/04C08L79/02C08K13/06C08K9/10C08K9/06C08K3/346C08K3/36C08K2003/2241
Inventor 赵绍洪钟广义陆小英蒋南昌
Owner JIANGSU ZHONGTU PAINT DETECTION CENT CO LTD
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