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High-stability polyurethane curing agent and preparation process thereof

A polyurethane curing agent, high stability technology, applied in the field of polyurethane curing agent, can solve the problems of quality reduction, achieve the effect of improving performance quality, good dispersibility, and prolonging the storage period

Inactive Publication Date: 2019-06-28
SHANGHAI INABATA FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problem in the prior art that the overall quality of the polyurethane curing agent is greatly reduced due to the reaction of a small amount of water mixed with the polyurethane curing agent and the NCO group, the first purpose of the present invention is to provide a high-stable polyurethane curing agent. By adding Ethyl oleate and sodium lauryl sulfate, and make them play a good synergistic effect on each other to solve the above technical problems. It can maintain good stability during production and storage, and the overall higher quality

Method used

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  • High-stability polyurethane curing agent and preparation process thereof
  • High-stability polyurethane curing agent and preparation process thereof
  • High-stability polyurethane curing agent and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: A high-stability polyurethane curing agent, the components and their corresponding parts by weight are shown in Table 1, and are prepared through the following steps:

[0048] Step 1, empty, fill the closed stirred tank with nitrogen, and measure the oxygen content at the bottom of the stirred tank with an oxygen meter, and the measured oxygen content is 0.87%;

[0049] Step two, mix the materials, mix the corresponding parts by weight of DESMODURN 3390, ethyl acetate, ethyl oleate, sodium lauryl sulfate, ethyl orthoformate, 1,3-oxazepine, dialkyl Diphenylamine and citric acid are transported to the stirred tank by a magnetic pump, and protected by nitrogen during transport, and then stirred and mixed uniformly at a stirring speed of 1200 rpm and a time of 25 minutes to obtain sample materials;

[0050] Step three, sampling and filtering, testing the obtained sample materials, and removing impurities from the tested sample materials through the filter element filter...

Embodiment 2-8

[0052] Example 2-8: A high-stability polyurethane curing agent. The difference from Example 1 is that the components and their corresponding weight parts are shown in Table 1.

[0053] Table 1 Components and parts by weight in Examples 1-8

[0054]

[0055]

Embodiment 9

[0056] Example 9: A high-stability polyurethane curing agent. The difference from Example 1 is that step 2 is specifically set to mix materials, and the corresponding weight parts are 60 parts of DESMODUR N 3390 and 26 parts of ethyl acetate. Ester, 3 parts of ethyl oleate, 8 parts of sodium lauryl sulfate, 2.5 parts of ethyl orthoformate, 2.2 parts of 1,3-oxazolane, 0.8 parts of tributyl phosphite And 1.4 parts of citric acid are transported to the stirring tank through a magnetic pump, and protected with nitrogen during transport, and then stirred and mixed uniformly, at a stirring speed of 1200 rpm and a time of 25 minutes, to obtain a sample material.

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Abstract

The invention discloses a high-stability polyurethane curing agent and a preparation process thereof, relating to the technical field of polyurethane curing agents. According to the high-stability polyurethane curing agent and the preparation process, the problem that the integral quality of the polyurethane curing agent is greatly reduced after a trace amount of water is mixed into the polyurethane curing agent to react with NCO groups is solved. The high-stability polyurethane curing agent contains the following components in parts by weight: 60-80 parts of DESMODURN 3390, 20-26 parts of ethyl acetate, 3-5 parts of ethyl oleate, 4-8 parts of lauryl sodium sulfate, 2.5-4.5 parts of ethyl orthoformiate, 1.6-2.2 parts of 1,3-oxazacyclopentane, 0.8-1.2 parts of an antioxidant and 0.6-1.4 parts of a stabilizer. The high-stability polyurethane curing agent can preserve good stability in the production and storage processes and has relatively high integral quality and a relatively long storage period.

Description

Technical field [0001] The invention relates to the technical field of polyurethane curing agents, more specifically, it relates to a high-stability polyurethane curing agent and a preparation process thereof. Background technique [0002] Polyurethane curing agent refers to the polyisocyanate group-containing component in two-component polyurethane paint. It is a synthetic material widely used in coatings, adhesives and other fields. [0003] The Chinese invention patent with publication number CN103848954A discloses a preparation method of a low-color environmentally friendly polyurethane curing agent, which includes the following steps: the first step: using a continuous reaction device, diol, trimethylolpropane and The toluene diisocyanate continuously reacts to form a prepolymer reaction solution, in which trimethylolpropane is fed in batches; the second step: the prepolymer reaction solution is separated through a two-stage thin film evaporator, and the separated residue Use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/71C08K5/00C08K5/41C08K5/07C08K5/18C08K5/092C08K5/353
Inventor 陆彩峰朱卫红刘红艳
Owner SHANGHAI INABATA FINE CHEM CO LTD
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