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Self-crosslinking polyurethane-polyurea aqueous dispersion and preparation method and application thereof

A dispersion, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., to achieve the effect of greatly chemical resistance, reducing the strength of the paint film, and easy process operation

Pending Publication Date: 2019-10-01
WANHUA CHEM GUANGDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the problems existing in the current polyurethane-polyurea aqueous dispersion, the purpose of the present invention is to provide a self-crosslinking polyurethane-polyurea at room temperature with fast drying speed, excellent water resistance and chemical resistance, and excellent indentation resistance under high humidity conditions. water dispersion

Method used

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  • Self-crosslinking polyurethane-polyurea aqueous dispersion and preparation method and application thereof
  • Self-crosslinking polyurethane-polyurea aqueous dispersion and preparation method and application thereof
  • Self-crosslinking polyurethane-polyurea aqueous dispersion and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Synthesis of ketone-containing carbonyl monomer compound I:

[0089] Add 172g of ethanolamine and 470g of diacetone acrylamide into a 1000ml reaction flask, stir and raise the temperature to 85°C, and keep the reaction for 4h. The target product was obtained immediately after discharge, and the conversion rate of diacetone acrylamide was 98.8%. Its structural formula is as follows, and its NMR test results are shown in the appendix figure 1 .

[0090]

Embodiment 2

[0092] Synthesis of ketone-containing carbonyl monomer compound Ⅱ:

[0093] Add 320g of N-aminoethylethanolamine and 470g of diacetone acrylamide into a 1000ml reaction flask, stir and raise the temperature to 80°C, and keep the reaction for 4h. The target product was obtained after discharge, and the conversion rate of diacetone acrylamide was 98.2%. Its structural formula is as follows:

[0094]

Embodiment 3

[0096] Synthesis of ketone-containing carbonyl monomer compound Ⅲ:

[0097] Add 100 g of diethylenetriamine and 324 g of diacetone acrylamide into a 1000 ml reaction flask, stir and raise the temperature to 85° C., and keep it warm for 4 hours. The target product was obtained after discharging, and the conversion rate of diacetone acrylamide was 97.2%. Its structural formula is as follows:

[0098]

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Abstract

The invention provides a preparation method of a ketocarbonyl-containing chain extender for polyurethane-polyurea and a polyurethane-polyurea aqueous dispersion using the chain extender. The chain extender contains secondary amine active hydrogen connecting an amide group. The polyurethane polyurea aqueous dispersion adopting the ketocarbonyl-containing chain extender can be used in the fields ofwood coatings, industrial paints and the like, and a paint film of the polyurethane polyurea aqueous dispersion also has excellent indentation resistance, excellent chemical resistance and higher hardness under high humidity conditions.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, and in particular relates to a self-crosslinking polyurethane-polyurea aqueous dispersion and its preparation method and application. Background technique [0002] Water-based polyurethane-polyurea aqueous dispersion uses water as the dispersion medium. It is non-toxic, odorless, and non-flammable. It is an environmentally friendly polymer material and is widely used in the field of wood coatings. In the production process of water-based polyurethane wood lacquer, in order to improve work efficiency and storage capacity, it is necessary to dry the surface of the furniture after spraying the paint quickly, to avoid indentation when the furniture is stacked, and under high humidity conditions (such as Humidity 80%) can also be constructed, which puts forward very high requirements on the polyurethane-polyurea water body itself. After drying, the paint film should not only have high ha...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C08G18/36C08G18/32C08G18/34C08G18/38C08G18/28C08G18/42C08J3/24C08J3/07C09D175/06C09D175/02
CPCC08G18/283C08G18/348C08G18/36C08G18/3825C08G18/4277C08G18/44C08G18/664C08G18/6651C08G18/6655C08G18/6659C08G18/6662C08J3/07C08J3/24C09D175/02C09D175/06
Inventor 王震纪学顺朱文辉孙常青晋云全邓俊英
Owner WANHUA CHEM GUANGDONG
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