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Polyaspartatepolyurea coating with moderate surface drying time and adaptability to environmental change and preparation method and use method and application thereof

A technology of aspartic acid ester and surface dry time, applied in polyurea/polyurethane coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc. Poor adhesion, hindering application and other problems, to achieve the effect of easy spraying performance, moderate curing speed and prolonged construction time

Active Publication Date: 2019-02-19
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 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 coating with moderate dry time and adaptability to environmental changes, which specifically includes the following steps:

[0031] (1) Preparation of material A:

[0032] In percent by weight, weigh 25% polytetrahydrofuran diol, 74% isophorone diisocyanate and 1% nanometer graphene oxide and add in a three-necked flask equipped with a stirrer, a heating device and a condenser, Raise the temperature to 70°C, mix and react for 12 hours, and measure the NCO content, and synthesize a prepolymer in which the number of moles 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 ...

Embodiment 2

[0038] The purpose of this embodiment is to provide a polyaspartate polyurea coating with moderate dry time and adaptability to environmental changes, which specifically includes the following steps:

[0039] (1) Preparation of material A:

[0040] In percent by weight, weigh 30% polytetrahydrofuran trihydric alcohol, 67% hexamethylene diisocyanate and 3% nano-graphene oxide and add in a three-necked flask equipped with a stirrer, a heating device and a condenser, Raise the temperature to 75° C., mix and react for 8 hours, and measure the NCO content, and synthesize a prepolymer in which the number of moles 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 droppi...

Embodiment 3

[0046] The purpose of this embodiment is to provide a polyaspartate polyurea coating with moderate dry time and adaptability to environmental changes, which specifically includes the following steps:

[0047] (1) Preparation of material A:

[0048] In percent by weight, weigh 35% of polyethylene glycol diol, 60% of hexamethylene diisocyanate trimer and 5% of nano-graphene oxide and add agitator, heating device and condenser In a three-neck flask, heat up to 80°C and mix for 14 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;

[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 30min, 85°C heat preservation reaction fo...

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Abstract

The invention belongs to the technical field of spraying polyurea elastic materials, and discloses a polyaspartatepolyurea coating witha moderate surface drying time and adaptability to environmentalchanges, which is prepared from a A material and a B material. The mole ratio of NCO in the A material to NH in the B material is 1.05:1.1. The A material is mainly prepared from,by weight,25-44% of polyether polyol, 55-74% of aliphatic polyisocyanate and 1-5% of nanographene oxide; the B material is mainly prepared from, by weight,70-80% of polyaspartate, 10-15% of nano metal oxide filler, 5-10%of pigment and filler, 1-3% of defoaming agent, 1-3% of leveling agent and 2-5% of adhesion promoter. The invention further provides a preparation method and use method and application of the polyaspartatepolyurea coating. The polyaspartatepolyurea coating has the advantages of being easy to brush, moderate in the surface drying time, and capable of adapting to the environmental changes.

Description

technical field [0001] The invention belongs to the technical field of spray-coated polyurea elastic materials, and in particular relates to a polyaspartate polyurea coating with moderate surface drying time and adaptable to environmental changes, 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 coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/16C09D5/08C08G18/48C08G18/60C08G18/10
CPCC08G18/10C08G18/4854C08G18/603C08K2003/2241C08K2003/327C08K2201/011C09D5/08C09D5/1662C09D175/02C08K3/042C08K3/22C08K3/32
Inventor 程俊汤紫俊王元虎鲁杰戴宇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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