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A kind of anti-yellowing epoxy resin curing agent and preparation method thereof

A technology of changing epoxy resin and curing agent, which is applied in the field of anti-yellowing epoxy resin curing agent. It can solve the problems of affecting the color of the surface coating, poor yellowing resistance, and deep color, so as to mask the color and improve the yellowing resistance. Effect

Active Publication Date: 2017-07-18
雅安市弘利展化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of curing system has deep color and poor yellowing resistance. When it is necessary to make a transparent or light-colored topcoat, the color depth of the medium and primer will seriously affect the color of the topcoat, and the expected effect cannot be achieved; in addition, after long-term use , as the middle coat and base coat turn yellow and deepen the color, the color of the top coat will also change, affecting the appearance

Method used

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  • A kind of anti-yellowing epoxy resin curing agent and preparation method thereof
  • A kind of anti-yellowing epoxy resin curing agent and preparation method thereof
  • A kind of anti-yellowing epoxy resin curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: the property difference of curing agent of different components

[0043] The prescriptions in each group of the present embodiment are as follows.

[0044]

[0045]

[0046]

[0047]

[0048] Chart:

[0049]

[0050]

[0051] Anti-yellowing test method:

[0052] (1) Test equipment

[0053] Anti-yellowing test chamber, GB / T250 color change card

[0054] (2) Test conditions

[0055] a The test temperature is 50°C;

[0056] b parameter requirements:

[0057] The distance between the turntable and the light source is 250mm;

[0058] Bulb 300W;

[0059] Test time: 12 hours

[0060] (3) Test steps

[0061] a Adjust the distance between the light source and the turntable to 250mm.

[0062] b. Put the sample into the turntable of the anti-yellowing test box, face up, and the surface should be flat without curling. It should be noted that the sample should not be too close to the center of the turntable (more than 50mm from the center),...

Embodiment 2

[0067] Embodiment 2: the influence of the polyether compound of different degree of polymerization on anti-yellowing property

[0068] The prescriptions in each group of this embodiment are as follows.

[0069]

[0070] It can be known from the above experiments that the degree of polymerization of the polyether compound has a certain influence on the anti-yellowing effect of the curing agent. When the temperature is between 1000 and 5000, it has the best anti-yellowing effect.

Embodiment 3

[0071] Embodiment 3: preparation method

[0072] Weigh the prescribed amount of amine curing agent, polyether compound, and accelerator in a container with a stirring distillation device, stir and heat up to 90°C, distill for 2 hours, remove the water and small molecules in the curing agent, and then cool down to room temperature , Accurately weigh the coupling agent and diluent, add them into the container and stir for 30 minutes before discharging and packaging.

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Abstract

The invention discloses an anti-yellowing epoxy resin curing agent. The anti-yellowing epoxy resin curing agent is prepared from 40-60 parts of an amine curing agent, 20-40 parts of a polyether compound, 0-20 parts of an accelerant, 0-10 parts of a coupling agent and 0-20 parts of a diluent. According to the anti-yellowing epoxy resin curing agent, on the basis that the curing agent cost is not increased, the color and luster of an epoxy curing system can be effectively covered, and the anti-yellowing property of the curing system is improved.

Description

technical field [0001] The invention relates to the technical field of epoxy resin curing agents, in particular to a yellowing-resistant epoxy resin curing agent. Background technique [0002] The floor refers to the ground that uses specific materials and techniques to carry out construction treatment on the original ground and presents a certain degree of decoration and functionality. Such as epoxy self-leveling floor, emery wear-resistant floor, epoxy terrazzo floor, cement-based terrazzo, epoxy colored sand floor, epoxy anti-static floor, epoxy anti-slip floor, polyurea anti-corrosion floor, polyurethane floor Floor, silicon PU floor, concrete seal curing agent floor, etc. [0003] Epoxy resin is an important class of thermosetting plastics, widely used in adhesives, coatings, etc., also known as artificial resin, artificial resin, resin glue, etc. Artificial resin is a thermosetting epoxy polymer. Most epoxy resins are made of Epichlorohydrin and bisphenol A (2,2-bis(...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/56C08G59/62C08G59/50
CPCC08G59/504C08G59/5073C08G59/56C08G59/62C08G59/621
Inventor 闵峻吴洪斌徐庆鑫杨旭明
Owner 雅安市弘利展化工有限公司