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One-component polyurea coating for water conservancy and hydropower and preparation method thereof

A single-component, hydropower-water technology, applied in polyurea/polyurethane coatings, coatings, etc., to achieve the effects of ensuring compactness, ensuring yellowing resistance, and improving bond strength

Active Publication Date: 2019-05-21
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain differences in the raw material composition of two-component polyurea coatings and one-component polyurea coatings. How to address these differences and combine the environmental characteristics of engineering applications to epoxy-modify one-component polyurea to obtain A compliant one-component polyurea coating for hydropower and water utilization is a very creative work

Method used

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  • One-component polyurea coating for water conservancy and hydropower and preparation method thereof
  • One-component polyurea coating for water conservancy and hydropower and preparation method thereof
  • One-component polyurea coating for water conservancy and hydropower and preparation method thereof

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Embodiment 1

[0059] A kind of preparation method of hydropower water utilization one-component polyurea coating of the present invention, it comprises the following steps:

[0060] A, the preparation of hydrogenated bisphenol A type epoxy resin:

[0061] In a four-neck flask equipped with a thermometer, a reflux condenser, a mechanical stirrer and a dropping funnel, first add hydrogenated bisphenol A solution diluted with methyl isobutyl ketone, catalyst 1 and NaOH in sequence, and stir at 50°C. Then add epichlorohydrin dropwise, and the reaction process is kept at 50°C for reflux reaction for 10 hours. At the same time, the reaction is kept under sealed and anaerobic conditions, and finally hydrogenated bisphenol A epoxy resin is obtained, which is stored for future use;

[0062] B, the preparation of the prepolymer of isocyanate:

[0063] Add diisocyanate, dehydrated polyether polyol, chain extender, and catalyst 2 into a four-neck flask equipped with a thermometer, reflux condenser, me...

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Abstract

The invention discloses a one-component polyurea coating for water conservancy and hydropower and a preparation method thereof. Diisocyanate, polyether polyol and hydrogenated epoxy resin are used asmain components, and some auxiliary agents are further added to form a liquid environmentally-friendly waterproof coating. Polyurea undergoes reaction by mainly using wet gas in air; a layer of compact waterproof film is formed on the surface of a curing coating layer; the shortcomings that pinholes are easily formed in the same type of products and the same type of products are easy to yellow andpoor in adhesion effect are overcome.

Description

technical field [0001] The invention relates to a polyurea coating, in particular to a single-component polyurea coating for hydropower and water utilization and a preparation method thereof. Background technique [0002] Since the founding of New China, a large number of hydropower and water conservancy projects have been built in my country. They have exerted huge social and economic benefits in hydropower generation, flood control and disaster reduction, industrial and agricultural water use, shipping, aquatic products, and environmental protection tourism. However, hydraulic concrete buildings, like other buildings, are likely to cause decay and aging of concrete under the alternating and continuous action of loads and harsh environments after they are completed and put into operation, and even cause numerous damages. At the same time, due to the combined effect of many unfavorable factors such as artificial irregular construction, problems in the building itself, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/10C08G18/66C08G18/48C08G18/32C08G18/58C08G18/40
Inventor 印风军麦树伦杨腾杰范方强
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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