Polyaspartic acid ester polyurea protective coating with enhanced mechanical properties as well as preparation method, use method and application thereof

An aspartate and protective coating technology, used in polyurea/polyurethane coatings, coatings, etc., can solve problems such as high temperature resistance and corrosion resistance that are not as good as fluorocarbon coatings, poor interlayer adhesion, hindering application, etc. , to achieve the effect of simple and easy operation, high adhesion, and enhanced mechanical properties.

Inactive Publication Date: 2019-03-08
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The purpose of this embodiment is to provide a polyaspartate polyurea protective coating with enhanced mechanical properties, specifically comprising the following steps:

[0031] (1) Preparation of material A:

[0032] In terms of weight percentage, weigh 25% of polytetrahydrofuran diol, 60% of TDI, 10% of urethane-based modified HDI trimer and 5% of nano-graphene oxide and add it with a stirrer and a heating device In a three-necked flask with a condenser, heat up to 70°C, mix and react for 12 hours, and measure the NCO content, and synthesize a prepolymer whose molar number of NCO is 10% of the total number of moles of the reaction substrate;

[0033] (2) Preparation of component B:

[0034] Weigh the corresponding amount of isophorone diamine, add it into a three-necked flask equipped with a stirrer, a heating device and a condenser, raise the temperature to 70°C, add the corresponding amount of diethyl maleate dropwise, and the dropping time is 30min , 85°C heat ...

Embodiment 2

[0038] The purpose of this embodiment is to provide a polyaspartate polyurea protective coating with enhanced mechanical properties, specifically comprising the following steps:

[0039] (1) Preparation of material A:

[0040] In terms of weight percentage, weigh 43% polytetrahydrofuran trihydric alcohol, 42% TDI, 12% urethane-based modified HDI trimer and 3% nano-graphene oxide and add it with a stirrer and a heating device In a three-necked flask with a condenser, heat up to 75°C, mix and react for 12 hours, and measure the NCO content, and synthesize a prepolymer whose molar number of NCO is 15% of the total number of moles of the reaction substrate;

[0041] (2) Preparation of component B:

[0042]Weigh the corresponding amount of dicyclohexylmethanediamine, add it into a three-necked flask equipped with a stirrer, a heating device and a condenser, raise the temperature to 75°C, add the corresponding amount of diethyl maleate dropwise, and the dropping time is 30min , 85...

Embodiment 3

[0046] The purpose of this embodiment is to provide a polyaspartate polyurea protective coating with enhanced mechanical properties, specifically comprising the following steps:

[0047] (1) Preparation of material A:

[0048] In percent by weight, take by weighing 41% polyethylene glycol glycol, 40% TDI, 18% urethane-based modified HDI trimer and 1% nano-graphene oxide and add with stirrer, add In the three-necked flask of the temperature device and the condenser, the temperature was raised to 80 ° C and mixed for 12 hours, and the NCO content was measured, and the number of moles of NCO synthesized was 10% of the total number of moles of the reaction substrate;

[0049] (2) Preparation of component B:

[0050] Weigh the corresponding amount of 1,6-hexamethylenediamine, add it into a three-necked flask equipped with a stirrer, a heating device and a condenser, raise the temperature to 80°C, add the corresponding amount of diethyl maleate dropwise, and the dropping time 30mi...

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PUM

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Abstract

The invention belongs to the technical field of spray polyurea elastic materials and discloses a polyaspartic acid ester polyurea protective coating with enhanced mechanical properties. The polyaspartic acid ester polyurea protective coating is mainly prepared by the following raw materials: a material A and a material B, wherein the molar ratio of NCO in the material A to NH in the material B is1.05 to 1.1; the material A is mainly prepared by the following raw materials in percentage by weight: 25-49 percent of polyether polyol, 40-60 percent of TDI, 10-25 percent of urethano-modified HDI trimer and 1-5 percent of nanometer graphene oxide; the material B is mainly prepared by the following raw materials in percentage by weight: 70-80 percent of polyaspartic acid ester, 10-15 percent ofnano metal oxide fillers, 5-10 percent of pigments and fillers, 1-3 percent of a de-foaming agent, 1-3 percent of a leveling agent and 2-5 percent of an adhesive force promoter. The polyaspartic acidester polyurea protective coating disclosed by the invention has enhanced mechanical properties such as better tensile strength and elongation at break, and simultaneously has higher adhesive force. In addition, a preparation method of the polyaspartic acid ester polyurea protective coating, disclosed by the invention, is simple and easy to operate and convenient to popularize.

Description

technical field [0001] The invention belongs to the technical field of spraying polyurea elastic materials, and in particular relates to a polyaspartate polyurea protective coating with enhanced mechanical properties, a preparation method, a use method and an application. Background technique [0002] Spray polyurea elastic material is a kind of reactive and solvent-free coating product developed in recent years at home and abroad. Since its inception, it has fully demonstrated its excellent physical and chemical properties, excellent public welfare and environmental protection. The advantages in the field of waterproof technology 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 realize different reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D7/61
CPCC08K2003/2241C08K2003/2275C08K2201/011C09D7/61C09D175/02C08K3/042C08K3/22
Inventor 程俊王元虎鲁杰汤紫俊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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