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Additive for low surface energy water-resistant and antifouling architectural coatings and preparation method thereof

An architectural coating, low surface energy technology, used in antifouling/underwater coatings, coatings, biocide-containing paints, etc., to achieve improved water resistance and antifouling properties, improved water resistance and mechanical properties, good dispersibility Effect

Active Publication Date: 2021-02-09
深圳市朗迈建材工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the antifouling and water resistance of existing low surface energy antifouling coatings need to be improved, the present invention proposes an additive for low surface energy water-resistant and antifouling architectural coatings and a preparation method. The prepared additive can significantly improve low Water Resistance and Antifouling Properties of Surface Energy Antifouling Coatings

Method used

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  • Additive for low surface energy water-resistant and antifouling architectural coatings and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Put the crushed inorganic particles into the air-flow ultrafine pulverizer, spray into the surfactant and grind repeatedly, so that the edges and corners of the inorganic particles are gradually passivated under the action of rotating collision grinding, and the materials are discharged to obtain an average particle size of 7μm surface-activated high-sphericity inorganic particles; the inorganic particles are silica; the surfactant is octylphenol polyoxyethylene ether; the speed of the crushing disc repeatedly polished by the airflow ultrafine pulverizer is 5600rpm, and the speed of the impeller is 2300rpm. The air volume is 2600m 3 / h, the time is 54min; in the preparation of surface-activated high-sphericity inorganic particles, the mass ratio of inorganic particles and surfactants is 100:2.5;

[0031] (2) Grind the surface-activated high-sphericity inorganic particles and hexamethylene diisocyanate in a grinder for 52 minutes at a speed of 180rpm, then move them ...

Embodiment 2

[0037] (1) Put the crushed inorganic particles into the air-flow ultrafine pulverizer, spray into the surfactant and grind repeatedly, so that the edges and corners of the inorganic particles are gradually passivated under the action of rotating collision grinding, and the materials are discharged to obtain an average particle size of 5μm surface-activated high-sphericity inorganic particles; the inorganic particles are zinc oxide; the surfactant is nonylphenol polyoxyethylene ether; the speed of the crushing disc repeatedly polished by the airflow ultrafine pulverizer is 5000rpm, the speed of the impeller is 2000rpm, and the air volume 3000m 3 / h, the time is 60min; in the preparation of surface-activated high-sphericity inorganic particles, the mass ratio of inorganic particles to surfactants is 100:1;

[0038] (2) Grind the surface-activated high-sphericity inorganic particles and hexamethylene diisocyanate in a grinder for 60 minutes at a speed of 150 rpm, then move them i...

Embodiment 3

[0042] (1) Put the crushed inorganic particles into the air-flow ultrafine pulverizer, spray into the surfactant and grind repeatedly, so that the edges and corners of the inorganic particles are gradually passivated under the action of rotating collision grinding, and the materials are discharged to obtain an average particle size of 8 μm surface-activated high-sphericity inorganic particles; the inorganic particles are silicon dioxide; the surfactant is alkylphenol polyoxyethylene ether; the speed of the crushing disc repeatedly polished by the airflow ultrafine pulverizer is 6000rpm, and the speed of the impeller is 2500rpm. Air volume is 3000m 3 / h, the time is 50min; in the preparation of surface-activated high-sphericity inorganic particles, the mass ratio of inorganic particles to surfactant is 100:3;

[0043] (2) Grind the surface-activated high-sphericity inorganic particles and hexamethylene diisocyanate in a grinder for 40 minutes at a speed of 250rpm, then move the...

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Abstract

The invention proposes an additive for low surface energy water-resistant and anti-fouling architectural coatings and a preparation method thereof. The additive is sprayed into a surfactant in a pulverizer and polished, and then the obtained surface-activated high-sphericity Inorganic particles are mixed with hexamethylene diisocyanate, polydimethylsiloxane and a catalyst for prepolymerization to obtain a mixed slurry, and finally the mixed slurry is sprayed and polymerized under high pressure. The additive provided by the invention is a high-sphericity organosilicon-modified polyurethane / inorganic particle composite particle, which introduces organosilicon molecular chains into polyurethane, and has good dispersibility when used in low surface energy coatings, which can significantly increase the coating density. The water contact angle improves the water resistance, antifouling performance and mechanical properties of the coating.

Description

technical field [0001] The invention relates to the technical field of antifouling coatings, in particular to an additive for low surface energy water-resistant and antifouling architectural coatings and a preparation method. Background technique [0002] With the global prohibition of organotin antifouling coatings, the research on completely non-toxic low surface energy antifouling coatings is increasing again. With the development of science and technology, the research and development of non-toxic antifouling coatings that meet environmental protection requirements has become an inevitable trend, and low surface energy antifouling coatings are a completely non-toxic antifouling coating that is easy to remove. It has important application value in ice adhesion, construction and other fields. [0003] At present, the main resins used to prepare hydrophobic and low surface energy coatings include silicone resins, fluorine-containing resins, and silicon nitrogen resins. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/73C08G18/61C08K3/36C08K3/22C09D5/16
CPCC08G18/61C08G18/73C08K3/22C08K3/36C08K2003/2296C09D5/1681
Inventor 陈庆昝航
Owner 深圳市朗迈建材工程有限公司