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Polyaspartic acid ester polyurea protective paint with good corrosion resistance, preparation method, using method and application

An aspartate, protective coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problem of high temperature resistance and corrosion resistance not as good as fluorocarbon coatings, poor interlayer adhesion, hindering application and other issues, to achieve good mechanical properties and corrosion resistance, strong adhesion, and reduce maintenance costs.

Inactive Publication Date: 2019-03-12
四川嘉宝莉涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although polyurea elastomer coatings have the above advantages, there are also some defects that hinder its application and development: such as too fast curing speed, poor interlayer adhesion, high temperature resistance and corrosion resistance are not as good as fluorocarbon coatings, etc. These defects are similar to spraying polyurea elastomer coatings. In addition to the main film-forming substances in urea waterproof coatings and their preparation processes, they are also related to the types and proportions of additives added
In addition, the spraying of polyurea elastomer coatings is a very advanced technology, and the quality and technology of construction personnel are also the reasons that affect its performance; secondly, the main raw materials and spraying equipment need to be imported, which leads to high costs, which also restricts my country's polyurea elastomer coatings. an important reason for the development

Method used

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  • Polyaspartic acid ester polyurea protective paint with good corrosion resistance, preparation method, using method and application
  • Polyaspartic acid ester polyurea protective paint with good corrosion resistance, preparation method, using method and application
  • Polyaspartic acid ester polyurea protective paint with good corrosion resistance, preparation method, using method and application

Examples

Experimental program
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Embodiment 1

[0030] The purpose of this embodiment is to provide a polyaspartic acid ester polyurea protective coating with good corrosion resistance and a preparation method thereof, specifically comprising the following steps:

[0031] (1) Preparation of material A:

[0032] In percent by weight, weigh 20% of polytetrahydrofuran diol and 80% of diphenylmethane-4,4-diisocyanate into a three-necked flask equipped with a stirrer, a heating device and a condenser, and heat up to 70-80 After mixing at ℃ for 12 hours, the number of moles of NCO synthesized is 10% of the total number of moles of the reaction substrates;

[0033] (2) Preparation of component B:

[0034] Weigh the corresponding amount of amino-terminated polyether D230, add it into a three-necked bottle equipped with a stirrer, a heating device and a condenser, raise the temperature to 70-90°C, add the corresponding amount of diethyl maleate dropwise, and the dropping time After 30 minutes, the corresponding amount of nano-grap...

Embodiment 2

[0038] The purpose of this embodiment is to provide a polyaspartic acid ester polyurea protective coating with good corrosion resistance and a preparation method thereof, specifically comprising the following steps:

[0039] (1) Preparation of material A:

[0040] In terms of weight percentage, weigh 25% of polytetrahydrofuran triol and 75% of isophorone diisocyanate into a three-necked flask equipped with a stirrer, a heating device and a condenser, heat up to 70-80°C and mix to react 12h, the number of moles of synthesized NCO is 10% of the prepolymer of the total number of moles of the reaction substrate;

[0041] (2) Preparation of component B:

[0042] Weigh the corresponding amount of amino-terminated polyether D400, add it into a three-necked bottle equipped with a stirrer, a heating device and a condenser, raise the temperature to 70-90°C, add the corresponding amount of dimethyl maleate dropwise, and the dropping time After 30 minutes, the corresponding amount of nano...

Embodiment 3

[0046] The purpose of this embodiment is to provide a polyaspartic acid ester polyurea protective coating with good corrosion resistance and a preparation method thereof, specifically comprising the following steps:

[0047] (1) Preparation of material A:

[0048] In terms of weight percentage, weigh 30% of polyethylene glycol diol and 70% of hexamethylene diisocyanate into a three-necked flask equipped with a stirrer, a heating device and a condenser, and heat up to 70-80°C for mixing After reacting for 12 hours, the number of moles of synthetic NCO is 15% of the prepolymer of the total number of moles of the reaction substrate;

[0049] (2) Preparation of component B:

[0050] Weigh the corresponding amount of amino-terminated polyether T403, add it into a three-necked bottle equipped with a stirrer, a heating device and a condenser, raise the temperature to 70-90°C, add the corresponding amount of dibutyl maleate dropwise, and the dropping time After 30 minutes, the corre...

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Abstract

The invention belongs to the technical field of spraying polyurea elastic materials, and discloses polyaspartic acid ester polyurea protective paint with good corrosion resistance. The polyaspartic acid ester polyurea protective paint with the good corrosion resistance is mainly prepared from the following raw materials: a material A and a material B, wherein a molar ratio of NCO in the material Ato NH in the material B is 1.05-1.1; the material A is mainly prepared from 20-40% of polyether glycol and 60-80% of polyisocyanate; and the material B is mainly prepared from 70-85% of polyasparticacid ester, 1-5% of nano oxidized graphene, 5-10% of nano metallic oxide filler, 5-10% of pigment and filler, 1-3% of a defoamer, 1-3% of a flatting agent and 2-5% of an adhesion promoter. The invention provides a preparation method, a using method and application of the polyaspartic acid ester polyurea protective paint. The invention has the advantages that after aging the polyaspartic acid esterpolyurea protective paint for 350 d, a change rate of tensile strength is less than 4.5%, and a change rate of elongation at break is less than 5.0%, the polyaspartic acid ester polyurea protective paint has a good mechanical property and corrosion resistance, an adhesive force is stronger, capacity of an anti-corrosion coating to resist an environmental change in practical application can be improved, and maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of spraying polyurea elastic materials, and in particular relates to a polyaspartic acid ester polyurea protective coating with good corrosion resistance, a preparation method, a use method and an application. Background technique [0002] Spray polyurea elastic material is a kind of reactive, solvent-free coating product developed in recent years at home and abroad. Since its inception, it has fully demonstrated its role in waterproofing with its excellent physical and chemical properties, excellent public welfare and environmental protection. The advantages in the technical field have been developed rapidly with its unparalleled superiority. Polyurea coatings are hydrophobic and autocatalytic, and have good physical and mechanical properties, tensile strength, abrasion resistance, impact resistance, chemical corrosion resistance and water resistance. [0003] Polyurea coating elastomer coatings can realiz...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08C09D7/61C08G18/48
CPCC08G18/4829C08G18/4854C08K2003/2241C08K2201/011C09D5/08C09D7/61C09D175/02C08K13/02C08K3/042C08K3/22C08K3/32
Inventor 程俊鲁杰汤紫俊邱海艳郭丽缨何冰谭中军赵强欧阳思陈刚
Owner 四川嘉宝莉涂料有限公司
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