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A kind of polysiloxane antifouling paint connecting coating and preparation method thereof

A technology of polysiloxane and antifouling paint, which is applied in antifouling/underwater coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc., and can solve problems such as inability to achieve coating and application effects, and low adhesion. Achieve the effect of easy industrial production, high adhesion and excellent bonding strength

Active Publication Date: 2021-10-26
QUZHOU RES INST OF ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low adhesion between the low surface energy antifouling coating and its contact interface, the low surface energy antifouling coating and its coated substrate often cannot achieve good coating and application effects.

Method used

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  • A kind of polysiloxane antifouling paint connecting coating and preparation method thereof
  • A kind of polysiloxane antifouling paint connecting coating and preparation method thereof
  • A kind of polysiloxane antifouling paint connecting coating and preparation method thereof

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preparation example Construction

[0043] A preparation method for polysiloxane antifouling paint connecting paint and coating, comprising the following steps:

[0044] Step 1: Preparation of silane-terminated polyurethane resin solution:

[0045] Get hydroxyl or hydroxypropyl polysiloxane as the polyurethane soft segment and 20 parts by weight of polytetrahydrofuran ether glycol as the polyurethane soft segment, the molar ratio of the polysiloxane soft segment to the polyether soft segment is 10:1 ~1:1; After mixing evenly, blend with isophorone diisocyanate as polyurethane hard segment, control NCO:OH=1.3:1~1.5:1; then add dibutyltin dilaurate as catalyst, the weight of catalyst It is 0.2% of the weight of the polyurethane soft segment; after reacting at 85°C for 5 hours, add 0.5 parts by weight of trimethylolpropane as a chain extender, and continue to react for 3 hours; The molar ratio of the soft segment is 0.5:1, and the reaction is continued for 3 hours to obtain a silane-terminated polyurethane resin s...

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Abstract

The invention relates to marine antifouling paint technology, and aims to provide a polysiloxane antifouling paint connecting paint and a preparation method thereof. A polysiloxane antifouling paint connection coating is provided, the coating comprises the following components in parts by weight: 50-90 parts of silane-terminated polyurethane resin solution, 5-55 parts of filler or thixotropic agent, and 20 parts of diluent . The invention solves the drawbacks that the existing polysiloxane low surface energy anti-fouling coatings in the market have poor surface adhesion with epoxy and other base materials and are easy to peel off, which leads to their inability to be popularized and applied; polysiloxane and polyether are used together as polyurethane The soft segment enables the combined coating to achieve a gradient change in the polysiloxane content from the primer to the topcoat, making the link paint and the topcoat have better adaptability; again, the co-introduction of polyether and polysiloxane, While ensuring the bonding performance of the connecting coating, it can also improve the saline-alkali water resistance effect of the connecting coating after the topcoat is damaged. The synthesis method is relatively simple, convenient for industrialized production, and the product is economical.

Description

technical field [0001] The present invention relates to marine antifouling paint technology, which is a fouling release composite coating system, and especially relates to being used as a link coat (link coat) or an adhesive coat (tie coat) in fouling release coatings. The combination coating system comprises a curable or crosslinkable polysiloxane low surface energy antifouling topcoat and a silane-terminated polyurethane. The invention also relates to the preparation method and coating method of the connecting coating. Background technique [0002] my country's land coastline is more than 18,000 kilometers long, and the ocean environment is complex and changeable from north to south. When a ship sails in the ocean environment, the hull part is easily fouled by marine organisms due to long-term immersion in seawater. According to statistics, 4,000-5,000 species of marine fouling organisms have been discovered in the world, and as many as 650 species have been recorded alo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/16C09D5/08C09D7/61C08G18/75C08G18/48C08G18/61C08G18/12C08G18/32C08G18/28
CPCC08G18/12C08G18/289C08G18/4009C08G18/4854C08G18/61C08G18/755C08K2003/2241C09D5/08C09D5/1662C09D5/1687C09D175/08C08G18/3206C08G18/2805C08K3/22C08K7/26
Inventor 张庆华郭鸿宇詹晓力陈丰秋程党国
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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