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Polyurea resin as well as preparation method and application thereof

A polyurea resin and resin technology, applied in the field of polyurea resin and its preparation, can solve problems such as easy bubbling, and achieve the effects of low cost, good water resistance, and simple preparation method

Active Publication Date: 2021-02-19
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, isocyanate is easy to react with the substrate or moisture in the air to release carbon dioxide gas, which causes polyurethane or polyurea coatings to easily bubble when applied in wet weather or on wet substrates.

Method used

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  • Polyurea resin as well as preparation method and application thereof
  • Polyurea resin as well as preparation method and application thereof
  • Polyurea resin as well as preparation method and application thereof

Examples

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preparation example Construction

[0055] The second aspect of the present invention provides the preparation method of the polyurea resin, comprising the following steps: under the dry condition protected by an inert gas, uniformly mixing the raw materials to obtain the obtained polyurea resin.

[0056] The third aspect of the present invention provides the application of the polyurea resin in the preparation of polyurea coatings.

Embodiment 1

[0061] Example 1 provides a polyurea resin, the preparation method of which is as follows: under the condition of nitrogen protection in a dry flask, add polyaspartic acid ester resin E1, oxazolidine compound F1 and stir and mix evenly to obtain; The weight ratio of the aspartate resin E1 to the oxazolidine compound F1 is 7:3.

[0062]

Embodiment 2

[0064] Example 2 provides a polyurea resin, the preparation method of which is as follows: in the case of nitrogen protection in a dry flask, add polyaspartic acid ester resin E1 and oxazolidine compound F2, stir and mix evenly, to obtain final product; The mass ratio of the polyaspartic ester resin E1 to the oxazolidine compound F2 is 8:2.

[0065]

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Abstract

The invention relates to the technical field of coatings, in particular to polyurea resin and a preparation method thereof. The polyurea resin is prepared from polyaspartic acid ester resin and at least one of the following components: (1) an oxazolidine compound; and (2) an imine compound; wherein the content of the polyaspartic acid ester resin is 10-90wt%. The invention provides the polyurea resin for preparing the polyurea coating, the preparation method is simple, the cost is low, the curing reaction gelation time of the polyurea resin and isocyanate is obviously prolonged, the construction difficulty is reduced, and the application range of the polyurea resin is enlarged; meanwhile, the prepared polyurea coating has good water resistance, and the phenomena of bubbling, wrinkling, obvious discoloration and falling cannot occur even if the polyurea coating is constructed in a humid environment.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a polyurea resin and a preparation method thereof. Background technique [0002] Polyaspartic Ester (PAE) is a special type of sterically hindered secondary amine, due to the steric hindrance and inductive effect of the ester group, especially the steric hindrance effect of the ortho-substituent of the amino group and the low-viscosity isocyanate The gel time of the curing agent can be adjusted from a few minutes to a few hours. Formula 1 is an example of the reaction formula for synthesizing PAE. In formula 1, if the structure of diamine R' is H, the gel time of the obtained PAE and isocyanate curing reaction is only a few minutes. In the formula, if the structure of diamine R' is -CH 3 , the gel time of the obtained PAE and isocyanate curing reaction can be greater than 30 minutes. The gel time is also the construction time. The increase in gel time reduces construction r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C08G18/65C08G18/32C08G18/38C09D175/02
CPCC08G18/6415C08G18/6529C08G18/3206C08G18/3844C08G18/3243C08G18/3234C09D175/02
Inventor 熊东路杨轩鲁晓东龙绪俭徐涛肖增钧李斌仁许超平陈林生
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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