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Anti-after-tack epoxy curing agent and preparation method and application thereof

A curing agent and epoxy-adhesive technology, which is applied in the direction of epoxy resin coating, coating, anti-corrosion coating, etc., can solve the problems affecting the adhesion of the upper coating, and achieve good curing effect, fast drying and simple process

Active Publication Date: 2019-01-04
重庆南方漆业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the construction process, epoxy anti-corrosion paint is very sensitive to the temperature and humidity of the construction environment, especially in cold and humid winters, it is very easy to form sticky oily substances on the surface during the film formation process, and in severe cases It may even ooze dripping sticky oily liquid on the surface of the paint film, seriously affecting the adhesion of the upper coat

Method used

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  • Anti-after-tack epoxy curing agent and preparation method and application thereof

Examples

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preparation example Construction

[0049] The present invention also provides a kind of preparation method of anti-adhesion epoxy resin, comprises the steps:

[0050] (a) mix cardanol, formaldehyde and toluene, and keep warm at 85±2°C for 1-3h to obtain material a;

[0051] (b) Cool the material a to ≤55°C, add diethylenetriamine and triethylenetetramine, raise the temperature to 80±5°C, and keep it warm for 1-3 hours to obtain material b;

[0052](c) Heat the material b to 100-105°C for reflux dehydration for 0.25-1h, heat up to 120±5°C, reflux for 0.5-1.5h, cool down to 60±5°C, add epoxy resin, ℃ heat preservation reaction 1-3h.

[0053] In a preferred embodiment of the present invention, during the process of adding the epoxy resin, the temperature is controlled not to exceed 80°C.

[0054] In a preferred embodiment of the present invention, in the step (c), the temperature of the material b is raised to 100-105°C for reflux dehydration for 0.5h, the temperature is raised to 120±5°C, the temperature is ref...

Embodiment 1

[0058] The preparation method of the anti-adhesion epoxy curing agent described in the present embodiment, the steps are as follows:

[0059] (1) Add 37 parts of cardanol, 10 parts of formaldehyde aqueous solution with a mass fraction of 37%, and 15 parts of toluene into the reaction kettle, stir evenly, slowly heat to 85±2°C, and keep warm for 1.5 hours to obtain material a;

[0060] (2) Turn on the cold oil pump to lower the temperature of material a below 55°C. With the cold oil pump turned on, slowly add 5 parts of diethylenetriamine and 10 parts of triethylenetetramine. The reaction is an exothermic reaction. After the temperature stabilizes, Turn off the cold oil pump, raise the temperature to 80°C and keep it warm for 2 hours to obtain material b;

[0061] (3) Raise the temperature of the material b to 100-105°C for reflux dehydration for 30 minutes, then raise the temperature to 120±5°C, and after reflux dehydration for 1 hour, cool down to 60°C, add E20 epoxy resin xy...

Embodiment 2

[0063] This embodiment refers to the preparation method of Example 1, the only difference is that the amounts of each raw material in parts by weight are: 38 parts of cardanol, 10 parts of formaldehyde, 15 parts of toluene, 5.5 parts of diethylenetriamine, triethylenetetra 11 parts of amine and 21 parts of 60% E20 epoxy resin xylene solution.

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Abstract

The invention relates to the technical field of curing agents, in particular to an anti-after-tack epoxy curing agent and a preparation method and application thereof. The anti-after-tack epoxy curingagent is mainly prepared by, by weight, 35-40 parts of anacardol, 8-12 parts of formaldehyde, 13-17 parts of toluene, 3-7 parts of diethylenetriamine, 8-12 parts of triethylene tetramine and 15-25 parts of epoxy resin. The anti-after-tack epoxy curing agent and the preparation method thereof have the advantages that by introducing epoxy resin fragments into the epoxy curing agent, the molecular weight of the epoxy curing agent is further increased, and the epoxy curing agent is fast in drying and excellent in compatibility with the epoxy resin; the epoxy curing agent can have reaction fast under a low-temperature and high-humidity condition, phase separation is avoided due to the fact that the epoxy curing agent has good compatibility with the epoxy resin, the surface of a formed paint film is dry, a sticky oil surface is avoided, good ply adhesion after the recoating of the epoxy curing agent or the mixed-coating of the epoxy curing agent and other finish paint, and the dry paint film without the oil surface can be formed at 0 DEG C.

Description

technical field [0001] The invention relates to the technical field of curing agents, in particular to an anti-adhesion epoxy curing agent and its preparation method and application. Background technique [0002] In the field of anti-corrosion paint, epoxy anti-corrosion paint is widely used because of its good acid, alkali and salt resistance and good physical and mechanical properties. However, during the construction process, epoxy anti-corrosion paint is very sensitive to the temperature and humidity of the construction environment, especially in cold and humid winters, it is very easy to form sticky oily substances on the surface during the film formation process. In severe cases It may even ooze dripping sticky oily liquid on the surface of the paint film, seriously affecting the adhesion of the top coat. [0003] In view of this, the present invention is proposed. Contents of the invention [0004] The first object of the present invention is to provide a kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C08G59/56C09D163/00C09D5/08
CPCC08G59/56C08G59/62C09D5/08C09D163/00
Inventor 穆欣
Owner 重庆南方漆业有限公司
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