Curing agent for epoxy anticorrosion primer and preparation method thereof

An anti-corrosion primer and curing agent technology, which is applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as difficulty in dispersion, poor stability, and easy agglomeration and settlement of graphene, so as to reduce film thickness and film density , good stability, excellent anti-settling effect

Active Publication Date: 2017-02-22
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of graphene anti-corrosion coating is to disperse graphene in resin by grinding. The disadvantage is that it is difficult to disperse, and graphene is easy to agglomerate and settle after standing, and has poor stability.

Method used

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  • Curing agent for epoxy anticorrosion primer and preparation method thereof
  • Curing agent for epoxy anticorrosion primer and preparation method thereof
  • Curing agent for epoxy anticorrosion primer and preparation method thereof

Examples

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preparation example Construction

[0027] Such as figure 1 Shown, the preparation method of curing agent for epoxy anticorrosion primer in the present invention comprises:

[0028] S101. Graphene oxide pre-dispersion treatment: uniformly disperse the formulated amount of graphene oxide in the formulated amount of mixed diluent to obtain a graphene oxide dilution;

[0029] S102. Finished product preparation: add the dicyclohexyl dicarboimide of the formula and the polyamide resin half of the formula into the diluent of graphene oxide, heat up to 100°C-110°C, turn on condensing reflux, and react under stirring conditions 2 to 4 hours; then lower the temperature to 45° C. to 55° C., add the remaining polyamide resin, mix evenly, and filter to remove impurities to obtain the curing agent for epoxy anticorrosion primer.

[0030] Preferably, in the step S101. In the graphene oxide pre-dispersion treatment, the graphene oxide is uniformly dispersed in the mixed diluent by ultrasonic dispersion, the ultrasonic dispers...

Embodiment 1

[0036] 1) The dosage of each component is as follows:

[0037]

[0038]

[0039] 2) Refer to attached figure 1 Middle process, preparation of curing agent for epoxy anti-corrosion primer

[0040] S101. Graphene oxide pre-dispersion treatment: uniformly disperse the formulated amount of graphene oxide in the formulated amount of mixed diluent by ultrasonic dispersion to obtain a graphene oxide diluent; the ultrasonic dispersion condition is 300W, and the ultrasonic time is 1h;

[0041] S102. Finished product preparation: add the dicyclohexyl dicarboimide and half the polyamide resin into the graphene oxide diluent, heat up to 100°C, turn on condensing reflux, and react under 300r / min stirring condition 4h; then lower the temperature to 45°C, add the remaining polyamide resin, stir evenly, filter and discharge the material to obtain the curing agent for epoxy anticorrosion primer.

Embodiment 2

[0043] 1) The dosage of each component is as follows:

[0044]

[0045] 2) Refer to attached figure 1 Middle process, preparation of curing agent for epoxy anti-corrosion primer

[0046] S101. Graphene oxide pre-dispersion treatment: uniformly disperse the formulated amount of graphene oxide in the formulated amount of mixed diluent through ultrasonic dispersion to obtain a graphene oxide diluent; the ultrasonic dispersion condition is 400W, and the ultrasonic time is 0.5h;

[0047] S102. Finished product preparation: Add the dicyclohexyl dicarboimide and half the polyamide resin into the graphene oxide diluent, heat up to 110°C, turn on condensing reflux, and react under 400r / min stirring condition 3h; then lower the temperature to 50°C, add the remaining polyamide resin, stir evenly, and filter through a 120-mesh filter to remove impurities to obtain the curing agent for epoxy anti-corrosion primer.

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Abstract

The invention discloses a curing agent for epoxy anticorrosion primer, prepared from, by weight, 30-58% of polyamide resin, 1-2% of graphene oxide, 0.1-0.2% of dicyclohexyl dicarbodiimide, and 40-68% of a mixed diluent. The curing agent for epoxy anticorrosion primer has good anti-settling and anti-agglomeration functions and has good anticorrosion property.

Description

technical field [0001] The invention relates to the technical field of nanometer polymer composite materials, in particular to a curing agent for epoxy anticorrosion primer and a preparation method thereof. Background technique [0002] Iron and its alloy products such as steel and aluminum alloys are exposed to air or corrosive liquids for a long time, and are easily corroded by oxygen or electrolyte solutions, resulting in a decrease in structural strength and seriously affecting appearance and service life. In the prior art, the corrosion protection of iron and its alloy equipment generally adopts the method of coating primer and matching topcoat on its surface to block its contact with corrosive media. At present, the commonly used primers on the market include epoxy zinc-rich primer and epoxy iron red primer. The zinc content in the epoxy zinc-rich primer is more than 90%, and it needs to be sprayed until the film thickness is 80-100 μm, resulting in a large increase i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/12C08G59/46
CPCC08G59/46C08K3/04C09D5/08C09D7/40C09D163/00
Inventor 谭伟民薛鹏郁飞倪维良胡秀东
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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