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Preparation method of epoxy resin grafted montmorillonite filler

A technology of epoxy resin and montmorillonite, which is used in fibrous fillers, anti-corrosion coatings, dyed polymer organic compounds, etc., can solve problems such as poor interface compatibility, improve corrosion resistance and service life, and eliminate defects and porosity effect

Active Publication Date: 2014-03-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a kind of preparation method of the montmorillonite filler of grafted epoxy resin, this method solves the peeling off of montmorillonite nano sheet structure, and the interfacial compatibility between anticorrosion coating resin and montmorillonite nano sheet layer The problem of poor corrosion resistance, the filler can significantly improve the corrosion resistance and service life of the anti-corrosion coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 100 grams of montmorillonite with a cation exchange capacity of 90 meq / 100 g into 4 liters of deionized water, and vigorously stir at 80° C. for 4 hours to obtain a stable montmorillonite suspension. Take 33 grams of tetraethylenepentamine and add it to 600 milliliters of deionized water, drop in hydrochloric acid equivalent to tetraethylenepentamine and stir for 30 minutes to prepare a quaternary ammonium salt. At this time, an amino group on the quaternary ammonium salt molecule has undergone quaternary reaction, while the remaining amino groups remain. Drop the quaternary ammonium salt solution into the montmorillonite suspension heated to 80°C, stir vigorously at 80°C for 2 hours, cool to room temperature, filter, and then wash repeatedly with deionized water until no chlorine can be detected with silver nitrate solution ion so far. The samples were dried at room temperature for 72 hours, and then dried in a vacuum oven at 60°C for 48 hours to remove residual m...

Embodiment 2

[0029] Add 100 grams of montmorillonite with a cation exchange capacity of 100 meq / 100 g into 3.5 liters of ethanol, and vigorously stir at 80° C. for 2 hours to obtain a stable montmorillonite suspension. Get 35 grams of diaminodiphenylmethane and add it to 500 milliliters of deionized water, drop in sulfuric acid equivalent to diaminodiphenylmethane and stir at 80°C for 30 minutes to prepare a quaternary ammonium salt. At this time, one of the quaternary ammonium salt molecules The amino group has been quaternized while the other amino group remains. Drop the quaternary ammonium salt solution into the montmorillonite suspension heated to 80°C, stir vigorously at 80°C for 2 hours, cool to room temperature, filter, and then wash repeatedly with deionized water until no chlorine can be detected with silver nitrate solution ion so far. The samples were dried at room temperature for 72 hours, and then dried in a vacuum oven at 60°C for 48 hours to remove residual moisture. The ...

Embodiment 3

[0032] Add 100 grams of montmorillonite with a cation exchange capacity of 85 meq / 100 g into 1 liter of isopropanol, and vigorously stir at 80° C. for 2 hours to obtain a stable montmorillonite suspension. Take 28 grams of 6-aminocaproic acid and add it to 600 milliliters of deionized water, drop in benzenesulfonic acid equivalent to 6-aminocaproic acid and stir at 80°C for 30 minutes to prepare a quaternary ammonium salt. The amino group has been quaternized while the other carboxyl group remains. Drop the quaternary ammonium salt solution into the montmorillonite suspension heated to 80°C, stir vigorously at 80°C for 2 hours, cool to room temperature, filter, and then wash repeatedly with deionized water until no chlorine can be detected with silver nitrate solution ion so far. The samples were dried at room temperature for 72 hours, and then dried in a vacuum oven at 60°C for 48 hours to remove residual moisture. The dried sample was ground and passed through a 300-mesh s...

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Abstract

The invention relates to a preparation method of an epoxy resin grafted montmorillonite filler. The montmorillonite filler is prepared from the following raw materials: 100 of montmorillonite, 1-45 of organic amine, protonating agent same molar equivalent with organic amine, 0.5-300 of epoxy resin, 100-10000 of dispersant, and 10-5000 of solvent. The preparation method comprises the following steps of: firstly preparing organized montmorillonite; then adding epoxy resin to the organic montmorillonite, adding the solvent to regulate the viscosity of the reaction system, reacting at the temperature range of 15-140 DEG C for 1-24 hours, introducing epoxy resin molecules to the nano laminar surface of montmorillonite, and remaining the rest epoxide group; and stripping the nano lamella of montmorillonite to obtain the epoxy resin grafted montmorillonite filler. The obtained filler has few defects and pores, and can form a densified protective layer in an anti-corrosion coating, thereby significantly improving anticorrosion effect and service life of the anti-corrosion coating.

Description

technical field [0001] The invention relates to the technical field of coatings, and in particular provides a preparation method of montmorillonite filler grafted with epoxy resin. Background technique [0002] As the most effective, economical and widely used anti-corrosion method for metal materials, organic coatings are the basis for anti-corrosion of metal substrates. my country alone will produce more than 1 million tons of organic coatings to protect metals every year, more than half of which are epoxy resin-based coatings. Therefore, this patent chooses to graft epoxy resin on the montmorillonite nanosheet layer to improve the application range of montmorillonite filler. [0003] In recent years, montmorillonite filler has become one of the hotspots in the field of coating research. Montmorillonite is a natural layered structure, and the size of each layer is about 1 nanometer thick and hundreds of nanometers square. As a nano scale filler, montmorillonite has a hug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/10C09D7/12C09D5/08
Inventor 吴航朱圣龙李瑛王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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