Polysiloxane antifouling paint connecting coating material and preparation method thereof
A polysiloxane and antifouling paint technology, applied in antifouling/underwater coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc., can solve the problems of inability to achieve coating and application effects, low adhesion, etc. To achieve the effect of convenient industrial production, high adhesion and good product economy
Active Publication Date: 2020-05-22
QUZHOU RES INST OF ZHEJIANG UNIV
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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.
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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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The invention relates to a marine antifouling coating material technology, and aims to provide a polysiloxane antifouling paint connecting coating material and a preparation method thereof. The invention provides a polysiloxane antifouling paint connecting coating material, which is prepared from the following components in parts by weight: 50 to 90 parts of a silane-terminated polyurethane resinsolution, 5 to 55 parts of a filler or thixotropic agent and 20 parts of a diluent. According to the invention, the problem that the existing polysiloxane low-surface-energy antifouling coating material on the market cannot be popularized and applied due to poor adhesion with the surface of epoxy and other base materials and easy peeling off is solved; polysiloxane and polyether are jointly used as a polyurethane soft segment, so that the gradient change of the polysiloxane content of the combined coating from primer to top coat is realized, and the connecting paint and the top coat have goodadaptability; by jointly introducing polyether and polysiloxane, so that the bonding performance of the connecting coating material is guaranteed while the saline-alkaline water resistant effect of the connecting coating material can be improved after the top coat coating is damaged; and the synthesis method is simple, convenient for industrial production and good in product economy.
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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Login to View More 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