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Wear-resistant waterborne two-component polyurethane coating and preparation method thereof

A water-based polyurethane, two-component technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor adhesion, poor toughness, high cost, and improve the anti-adhesive wear properties, hardness and wear resistance. Improved, high-quality coating effects

Active Publication Date: 2010-07-28
JIANGSU MARINE VICTORY COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These coatings have extremely high wear resistance. However, in addition to high cost, the application of such coatings will also cause poor adhesion due to the difference in thermal expansion coefficient between the substrate and the coating, especially inorganic materials have poor toughness and are easily broken. its application

Method used

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  • Wear-resistant waterborne two-component polyurethane coating and preparation method thereof
  • Wear-resistant waterborne two-component polyurethane coating and preparation method thereof
  • Wear-resistant waterborne two-component polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Mix 5g of fumed silica with a hydroxyl content of 560mgKOH / g, 100g of adipic acid polyester diol with a hydroxyl content of 40mgKOH / g, and 350g of deionized water, and disperse at room temperature for 1 hour with high-speed shearing and ultrasonic waves. An aqueous polyester diol dispersion of fumed silica was prepared. Mix the above mixture with 22.75g of a polyether urethane type crosslinking agent with an NCO content of 22%, stir at room temperature for 30 minutes at high speed, add 5g of polyvinyl alcohol, and stir at high speed for 15 minutes to prepare a two-component gas phase dioxide Silicone / polyurethane water-based coating.

Embodiment 2

[0057] Mix 20g of fumed silica with a hydroxyl content of 560mgKOH / g, 100g of adipic acid-type polyester diol with a hydroxyl content of 40mgKOH / g, and 400g of deionized water, and disperse at room temperature for 3 hours under high-speed shearing and ultrasonic waves. An aqueous polyester diol dispersion of fumed silica was prepared. Mix the above mixture with 52g of a polyether urethane type crosslinking agent with an NCO content of 22%, and stir at high speed for 20 minutes at room temperature, add 6g of polyvinyl alcohol, and stir at high speed for 10 minutes to prepare a two-component fumed silica / Polyurethane water-based coating.

Embodiment 3

[0059] Mix 25g of fumed silica with a hydroxyl content of 300mgKOH / g, 100g of adipic acid-type polyester diol with a hydroxyl content of 40mgKOH / g, and 250g of deionized water, and disperse at room temperature for 3 hours under high-speed shearing and ultrasonic waves. An aqueous polyester diol dispersion of fumed silica was prepared. Mix the above mixture with 30 g of a polyether urethane type crosslinking agent with an NCO content of 22%, and stir at high speed for 40 minutes at room temperature, add 3 g of polyvinyl alcohol, and stir at high speed for 20 minutes to prepare a two-component fumed silica / Polyurethane water-based coating.

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Abstract

The invention discloses a wear-resistant waterborne two-component polyurethane coating and a preparation method thereof. The wear-resistant waterborne two-component polyurethane coating is mainly prepared from the following components: a component A comprising polyester diols or polyurethane aqueous dispersion, fumed silica, and a component B which is a cross linking agent. For the wear-resistantwaterborne two-component polyurethane coating prepared by the method, the hardness and wear resistance are improved well, and the heat resistance and the anti-ultraviolet performance are good. After 6 month, the performance of the waterborne coating is not changed basically. The polyurethane aqueous dispersion and the fumed silica / polyurethane composite aqueous dispersion have self-emulsifying function. The waterborne coating has good storage stability and the silica is dispersed in the waterborne coating well. The preparation method has the advantages of no pollution, environmental protection, high coating quality and the like.

Description

technical field [0001] The invention relates to the preparation technology of a wear-resistant two-component water-based polyurethane coating, in particular to a wear-resistant two-component water-based wood coating and a preparation method thereof. Background technique [0002] Polymer wear mainly has the following forms: adhesive wear, abrasive wear, fatigue wear, and tribo-chemical reaction in friction. In practice, several kinds of wear will occur at the same time. As for which wear mechanism plays a major role, it is determined by the nature of the polymer itself, and the wear mechanisms of thermoplastics, elastomers and composite materials are different. Intimate contact, plastic deformation, and the formation of frictional heat all lead to adhesion between the two substances. For polymer-polymer sliding groups, adhesive wear is the most important wear mechanism. Adhesion is strongly dependent on surface interface properties. It should be pointed out that the molecu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/00
Inventor 罗穗莲孔文忠赖海平刘妃婵
Owner JIANGSU MARINE VICTORY COATING