Waterborne marine antifouling coating with low surface energy

A coating, silicon-modified acrylic technology, used in antifouling/underwater coatings, coatings, and biocide-containing paints, etc. problem, to achieve the effect of excellent antifouling effect, good mechanical properties and excellent mechanical properties

Inactive Publication Date: 2019-04-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the prior art, and provide a water-based low surface energy marine antifouling coating, which solves the problem that solvent-based antifouling coatings are not conducive to Environmental and human health and poor performance of silicone or organic fluorine resin alone

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  • Waterborne marine antifouling coating with low surface energy

Examples

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Embodiment 1

[0042] Example 1 A water-based low surface energy marine antifouling coating

[0043] 1. Preparation method

[0044] 1. Preparation of organofluorosilicon oligomers: Add 100 g of deionized water, 3 g of dodecylbenzenesulfonic acid, and 2 g of sodium dodecyl sulfate into a 500 mL four-necked flask, stir well and then heat up To 50 ℃ to fully dissolve, then add 5g D 3 F (trifluoropropylmethylcyclotrisiloxane), 25g D 4 (Octamethylcyclotetrasiloxane) was reacted at 50°C for 1 h, then raised to 75°C, reacted for 10 h, neutralized with glacial acetic acid to pH = 7, and stopped the reaction to obtain an organofluorine-silicon oligomer microemulsion.

[0045] 2. Preparation of organofluorosilicon-modified acrylic resin: Add 500 g of water and 8 g of emulsifier sodium lauryl sulfate into the reactor, heat to 60° C., and fully stir to dissolve. In another flask, pre-mix 200 g methyl methacrylate, 150 g butyl acrylate, and 70 g α-methacrylic acid, take out 1 / 10 of the acrylate monome...

Embodiment 2

[0047] Example 2 A water-based low surface energy marine antifouling coating

[0048] 1. Preparation method

[0049] 1. Preparation of organofluorosilicon oligomers: Add 110 g of deionized water, 3 g of dodecylbenzenesulfonic acid, and 3 g of sodium dodecyl sulfate into a 500 mL four-necked flask, stir well and heat up to 50°C to fully dissolve, then add 4g D 3 F (trifluoropropylmethylcyclotrisiloxane), 25g D 4 (Octamethylcyclotetrasiloxane) was reacted at 50°C for 1 h, then raised to 75°C, reacted for 10 h, neutralized with glacial acetic acid to pH=7, and then stopped the reaction to obtain organofluorine-silicon oligomer microemulsion .

[0050] 2. Preparation of organofluorosilicon-modified acrylic resin: Add 500 g of water and 10 g of emulsifier sodium lauryl sulfate into the reactor, heat to 60° C., and fully stir to dissolve. In another flask, pre-mix 210 g methyl methacrylate, 160 g butyl acrylate, and 80 g α-methacrylic acid, take out 1 / 10 of the acrylate monomer ...

Embodiment 3

[0052] Example 3 A water-based low surface energy marine antifouling coating

[0053] 1. Preparation method

[0054] 1. Preparation of organofluorosilicon oligomers: Add 80 g of deionized water, 2 g of dodecylbenzenesulfonic acid, and 2 g of sodium dodecyl sulfate into a 500 mL four-necked flask, stir well and heat up to 50°C to fully dissolve, then add 4g D 3 F (trifluoropropylmethylcyclotrisiloxane), 25g D 4 (Octamethylcyclotetrasiloxane) was reacted at 50°C for 1 h, then heated to 75°C, reacted for 10 h, neutralized with glacial acetic acid to pH = 7, and then stopped the reaction to obtain an organofluorine-silicon oligomer microemulsion .

[0055] 2. Preparation of organofluorosilicon-modified acrylic resin: Add 500 g of water and 10 g of emulsifier sodium lauryl sulfate into the reactor, heat to 60° C., and fully stir to dissolve. In another flask, pre-mix 220 g methyl methacrylate, 170 g butyl acrylate, and 90 g α-methacrylic acid, take out 1 / 10 of the acrylate mono...

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Abstract

The invention discloses a waterborne marine antifouling coating with low surface energy. Waterborne fluorosilicified acrylic resin is toughened by waterborne organic silicon resin and is compounded with nanoparticles, so that a super-hydrophobic coating with a micro-nano structure is obtained. The waterborne marine antifouling coating is prepared by taking water as a solvent and does not contain volatile organic matters so as to be safe, environment-friendly, nontoxic, harmless and good in mechanical properties. The obtained coating has a contact angle of 120 DEG and the surface energy of 31.2mN/m and reaches the water resistance that the coating is not abnormal and does not fall off within 480 h; found by hanging board experiments, the attachments of diatoms, barnacles and marine bacteria are obviously reduced than those of a traditional antifouling coating; seawater is experimented in two high biological seasons, the attachment area of marine organisms is smaller than or equal to 5%, and the antifouling effect is excellent; the waterborne marine antifouling coating has the adhesion of 8 MPa, the flexibility of 1 mm and the hardness of 4 H and has good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings. More specifically, it relates to a water-based low surface energy marine antifouling coating. Background technique [0002] Marine biofouling is ubiquitous in the marine environment and is one of the most important issues facing the shipping industry. According to research, there are as many as 2,000 species of common marine fouling organisms, the most common being algae, hydra, barnacles, oysters, etc. The adhesion of marine organisms will lead to an increase in the weight of the hull and sailing friction, and an increase in power and fuel consumption. hinder the development of marine economy. According to statistics, the fuel consumption caused by marine fouling can increase by up to 40%, and the total cost of the voyage can increase by up to 77%. Organotin (TBT) has been widely used since the 1970s. However, organotin can disrupt the endocrine of molluscs and induce sexual distort...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C09D7/20C09D5/16C09D7/61C08F220/14C08F220/18C08F220/06C08F8/42
CPCC08F8/42C08F220/14C08K2003/2241C08K2201/011C09D5/1662C09D5/1687C09D7/20C09D133/12C08K3/36C08K3/34C08K3/22C08F220/1804C08F220/06
Inventor 李伟华刘睿曹文凯杜建伟
Owner SUN YAT SEN UNIV
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