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Novel curing agent

A curing agent, a new type of technology, applied in the direction of coating, etc., can solve the problems of poor toughness, easy cracking of paint film, etc., achieve enhanced stability, increase environmental protection performance, and solve the effects of poor toughness

Inactive Publication Date: 2013-06-26
王栋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of curing agent, which solves the problems of poor toughness of traditional curing agents and easy cracking of paint films in winter; it can not only increase the environmental protection performance of the product curing agent, reduce its toxicity to the human body and the impact on the environment, but also It also reduces the hidden dangers of production safety in the traditional production process

Method used

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Embodiment Construction

[0030] The composition and weight percentage of this specific embodiment are: 533.1 g of diphenylmethane diisocyanate, 190.4 g of ethyl acetate, 1.1 g of oxidizing agent, 57.8 g of trimethylol propane, and 217.6 g of prepolymer.

[0031] Its preparation process is:

[0032] 1) Put in 1, 2, and 3 raw materials at one time, turn on the stirring, turn on the heating to raise the temperature, and stop heating when the temperature rises to 60°C;

[0033] 2) Put in about a quarter of the 4 raw materials, the temperature will rise significantly after putting in, observe the temperature change (the maximum temperature should not exceed 90°C), and be ready to cool down at any time. After the reaction of the 4 raw materials put in for the first time is complete and the temperature no longer rises significantly, the temperature drops to about 65°C, and the 4 raw materials are added again as appropriate, and the temperature is observed to prepare for cooling. According to this method, th...

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Abstract

The invention discloses a novel curing agent, relating to the field of epoxy resin application technologies. The novel curing agent comprises the following ingredients in percentage by weight: 533.1g of diphenylmethane diisocyanate, 190.4g of ethyl acetate, 1.1g of an oxidant, 57.8g of trimethylol propane, and 217.6g of prepolymer. A preparation process comprises the steps of: 1) feeding three raw materials 1, 2 and 3 at a time, stirring in an opening mode, starting heating for raising the temperature to be 60 DEG C; 2) feeding about one fourth of a raw material4, observing the temperature change, and preparing cooling at any time; 3) after the raw material 4 is entirely fed and the reaction is complete and when the temperature has no obvious rise, keeping the temperature at about 70 DEG C, and feeding a part of a raw material 5; 4) after the five raw materials are entirely fed, keeping the temperature at about 70 DEG C; and 5) after two hours, sampling to detect NCO. With the novel curing agent, the toxicity to human bodies and the influence on the environment can be reduced, and the hidden safety hazard in the traditional production links can also be reduced.

Description

Technical field: [0001] The invention relates to the technical field of pure acid resin application, in particular to a formulation of a novel curing agent and a preparation process thereof. Background technique: [0002] Curing agent, also known as hardening agent, curing agent or stabilizer, is a kind of substance or mixture that promotes or controls the curing reaction. Resin curing is through chemical reactions such as condensation, ring closure, addition or catalysis, so that the thermosetting resin undergoes an irreversible change process, and curing is completed by adding a curing (crosslinking) agent. [0003] Curing agents can be divided into room temperature curing agents and heating curing agents according to their uses. Epoxy resins generally have excellent performance when cured at high temperature, but the coatings and adhesives used in civil engineering and construction need to be cured at room temperature due to difficulty in heating; so most of them use ali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/58C09D7/12
Inventor 王栋
Owner 王栋
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