Water-based single-component self-polishing ship antifouling paint and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and provides a water-based single-component self-polishing ship antifouling paint and a preparation method thereof.The water-based single-component self-polishing ship antifouling paint is prepared from, by weight, 30-40 parts of organosilicon modified acrylic resin, 15-25 parts of antifouling agent, 1-4 parts of auxiliaries and 15-20 parts of water; the antifouling agent comprises the following components: modified inorganic nanoparticles and dichloro octyl isothiazolinone in a mass ratio of 19: (1-11); the modified inorganic nanoparticles are inorganic nanoparticles coated with imidazole compounds. According to the technical scheme, the problem that the antifouling effect of the ship antifouling paint in the related technology is poor is solved, and the water-based single-component self-polishing ship antifouling paint further has the characteristics of smooth paint surface and high water resistance, and has the characteristics of no growth of algae, oyster and other microorganisms within one year after being coated on ships such as warships and the like, and excellent antifouling effect.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a water-based single-component self-polishing ship antifouling paint and a preparation method thereof. Background Art

[0002] There are many organisms in the ocean that will attach to the bottom of ships and underwater facilities. These attached organisms are extremely harmful to ships and underwater facilities. They significantly increase the weight of the hull (up to 20kg / m2 on average), increase navigation resistance, affect the speed of the ship, and increase fuel consumption. For every 10 micron increase in roughness on the bottom surface of the ship, fuel loss increases by 1%, and attached organisms will accelerate ship corrosion and increase the number of repairs; attached organisms also have a serious impact on marine facilities such as offshore drilling platforms and seawater pipelines. In marine transportation and the shipbuilding industry, preventing marine biofouling has always been an important issue. Self-polishing ship antifouling paint has been widely used as an effective solution. Self-polishing ship antifouling paint is a special coating whose main components include resin, antifouling agent, pigment, etc. The uniqueness of this coating is that it can be gradually polished under the action of seawater, thereby continuously releasing antifouling agents, effectively preventing marine organisms from attaching and growing on the surface of the hull.

[0003] However, the marine environment is very complex, and ships are affected by the harsh marine environment during their service. The anti-fouling effect of the anti-fouling paint coating will fail under the influence of some specific environmental factors, thereby losing its protective effect on the ship. Summary of the invention

[0004] The invention provides a water-based single-component self-polishing ship antifouling paint and a preparation method thereof, which solves the problem that the antifouling effect of the ship antifouling paint in the related art is poor.

[0005] The technical solution of the present invention is as follows: The present invention provides a water-based single-component self-polishing ship antifouling paint, comprising the following components in parts by weight: 30-40 parts of organosilicon-modified acrylic resin, 15-25 parts of antifouling agent, 1-4 parts of auxiliary agent, and 15-20 parts of water; The antifouling agent comprises modified inorganic nanoparticles and dichlorooctylisothiazolinone in a mass ratio of 19:1 to 11; The modified inorganic nanoparticles are inorganic nanoparticles coated with imidazole compounds.

[0006] As a further technical solution, the preparation method of the antifouling agent comprises the following steps: The imidazole compound is dissolved, mixed with inorganic nanoparticles, and dried to obtain inorganic nanoparticles coated with the imidazole compound; The imidazole compound-coated inorganic nanoparticles and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent.

[0007] As a further technical solution, the imidazole compound includes 4-imidazolecarboxamide or imidazole-4-sulfonyl chloride.

[0008] As a further technical solution, the mass ratio of the modified inorganic nanoparticles to the dichlorooctylisothiazolinone is 19:5-9.

[0009] In the present invention, when the mass ratio of the modified inorganic nanoparticles to the dichlorooctylisothiazolinone is 19:5-9, the antifouling effect of the self-polishing antifouling topcoat is further improved.

[0010] As a further technical solution, the preparation method of the antifouling agent comprises the following steps: The imidazole compound is dissolved, mixed with inorganic nanoparticles, and then dichlorooctyl isothiazolinone is added and dried to obtain an antifouling agent.

[0011] In the present invention, dichlorooctyl isothiazolinone is loaded onto the modified inorganic nanoparticles, thereby further improving the antifouling effect of the self-polishing antifouling topcoat.

[0012] As a further technical solution, the mass ratio of the imidazole compound to the inorganic nanoparticles is 1-4:10; The solvent for dissolving is ethanol with a volume fraction of 70% to 80%.

[0013] As a further technical solution, the inorganic nanoparticles include one or both of titanium dioxide and mica powder.

[0014] As a further technical solution, the auxiliary agent includes at least one of a dispersant and a defoaming agent.

[0015] The present invention also provides a method for preparing the water-based single-component self-polishing ship antifouling paint, comprising the following steps: mixing the components of the water-based single-component self-polishing ship antifouling paint to obtain the water-based single-component self-polishing ship antifouling paint.

[0016] The present invention also proposes the use of the water-based one-component self-polishing ship antifouling paint or the water-based one-component self-polishing ship antifouling paint prepared by the preparation method in ship antifouling.

[0017] The working principle and beneficial effects of the present invention are: In the present invention, the water-based single-component self-polishing ship antifouling paint has the characteristics of smooth paint surface and strong water resistance. When coated on ships such as warships, microorganisms such as algae and oysters will not grow within one year, and the antifouling effect is excellent. In addition, the antifouling agent components of the water-based single-component self-polishing ship antifouling paint adopt imidazole compound-coated inorganic nanoparticles and dichlorooctyl isothiazolinone for synergistic effect, which significantly improves the antifouling effect of the self-polishing antifouling topcoat. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the following examples, the organosilicon-modified acrylic resin is a water-based organosilicon-modified acrylic resin purchased from Jining Tangyi Chemical Co., Ltd.; dichlorooctyl isothiazolinone was purchased from Wuhan Lvjing Fenghua Biotechnology Co., Ltd.

[0020] Example 1 A water-based one-component self-polishing ship antifouling paint comprises the following components in parts by weight: 30 parts of organosilicon-modified acrylic resin, 15 parts of antifouling agent, 1 part of dispersant BYK-110, 0.5 parts of defoaming agent 5300, and 15 parts of water; The antifouling agent comprises 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:1; The preparation method of the antifouling agent comprises the following steps: Dissolving 4-imidazolecarboxamide in 70% by volume ethanol, mixing with titanium dioxide, and drying to obtain 4-imidazolecarboxamide-coated titanium dioxide; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide is 1:10; The 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent; The preparation method of water-based single-component self-polishing ship antifouling paint comprises the following steps: mixing components of the water-based single-component self-polishing ship antifouling paint to obtain the water-based single-component self-polishing ship antifouling paint.

[0021] Example 2 A water-based one-component self-polishing ship antifouling paint comprises the following components in parts by weight: 40 parts of organosilicon-modified acrylic resin, 25 parts of antifouling agent, 4 parts of dispersant BYK-110, 0.1 parts of defoaming agent 5300, and 20 parts of water; The antifouling agent comprises 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:11; The preparation method of the antifouling agent comprises the following steps: Dissolving 4-imidazolecarboxamide in 70% by volume ethanol, mixing with titanium dioxide, and drying to obtain 4-imidazolecarboxamide-coated titanium dioxide; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide is 4:10; The 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent; The preparation method of water-based single-component self-polishing ship antifouling paint comprises the following steps: mixing components of the water-based single-component self-polishing ship antifouling paint to obtain the water-based single-component self-polishing ship antifouling paint.

[0022] Example 3 A water-based one-component self-polishing ship antifouling paint comprises the following components in parts by weight: 35 parts of organosilicon-modified acrylic resin, 20 parts of antifouling agent, 3 parts of dispersant BYK-110, 0.5 parts of defoaming agent 5300, and 18 parts of water; The antifouling agent comprises 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:3; The preparation method of the antifouling agent comprises the following steps: Dissolving 4-imidazolecarboxamide in ethanol with a volume fraction of 80%, mixing with titanium dioxide, and drying to obtain 4-imidazolecarboxamide-coated titanium dioxide; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide is 4:10; The 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent; The preparation method of water-based single-component self-polishing ship antifouling paint comprises the following steps: mixing components of the water-based single-component self-polishing ship antifouling paint to obtain the water-based single-component self-polishing ship antifouling paint.

[0023] Example 4 The only difference between this embodiment and embodiment 3 is that the components of the antifouling agent include 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:11.

[0024] Example 5 The only difference between this embodiment and embodiment 3 is that the components of the antifouling agent include 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:5.

[0025] Example 6 The only difference between this embodiment and embodiment 3 is that the components of the antifouling agent include 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:9.

[0026] Example 7 The difference between this embodiment and embodiment 3 is that the components of the antifouling agent include 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone in a mass ratio of 19:9; The preparation method of the antifouling agent comprises the following steps: Dissolving 4-imidazolecarboxamide in 70% by volume ethanol, mixing with titanium dioxide, and drying to obtain 4-imidazolecarboxamide-coated titanium dioxide; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide is 1:10; The 4-imidazolecarboxamide-coated titanium dioxide and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent.

[0027] Example 8 The difference between this embodiment and embodiment 6 is that the preparation method of the antifouling agent comprises the following steps: After dissolving 4-imidazolecarboxamide in ethanol with a volume fraction of 80%, the mixture was mixed with titanium dioxide, and then dichlorooctylisothiazolinone was added and dried to obtain an antifouling agent; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide was 4:10.

[0028] Example 9 The difference between this embodiment and embodiment 6 is that the preparation method of the antifouling agent comprises the following steps: After dissolving 4-imidazolecarboxamide in 70% by volume ethanol, the mixture was mixed with titanium dioxide, and then dichlorooctylisothiazolinone was added and dried to obtain an antifouling agent; wherein the mass ratio of 4-imidazolecarboxamide to titanium dioxide was 1:10.

[0029] Comparative Example 1 The difference between this comparative example and Example 3 is that the component of the antifouling agent is 4-imidazolecarboxamide-coated titanium dioxide.

[0030] Comparative Example 2 The difference between this comparative example and Example 3 is that the antifouling agent is dichlorooctyl isothiazolinone.

[0031] The following performance tests were performed on the water-based one-component self-polishing ship antifouling paints prepared in Examples 1 to 9 and Comparative Examples 1 to 2: According to the standard GB / T 5370-2007 "Antifouling paint sample shallow sea immersion test method", the shallow sea hanging board antifouling effect test was carried out; the results showed that the antifouling paint prepared in Examples 1 to 9 did not grow microorganisms such as seaweed and oysters within one year, and the antifouling effect was scored after continuing the test for 48 months; The wear resistance test is carried out according to the standard GB / T 13448-2005 "Test methods for color coated steel sheets and steel strips"; Water resistance test is carried out according to the standard GB / T 1733-2008 "Determination of water resistance of paint film"; The results are shown in Table 1 below.

[0032] Table 1 Performance test results

[0033] Compared with Comparative Examples 1 to 2, the water-based one-component self-polishing ship antifouling paints prepared in Examples 1 to 9 have better antifouling effects, indicating that the antifouling agent components of the water-based one-component self-polishing ship antifouling paints are synergistically prepared by using imidazole compounds to coat inorganic nanoparticles and dichlorooctylisothiazolinone, which significantly improves the antifouling effect of the self-polishing antifouling topcoat and has the characteristics of water resistance and wear resistance.

[0034] Compared with Examples 3 to 4, the water-based one-component self-polishing ship antifouling paint prepared in Examples 5 to 6 has a better antifouling effect, indicating that when the mass ratio of the modified inorganic nanoparticles to the dichlorooctyl isothiazolinone is 19:5 to 9, the antifouling effect of the self-polishing antifouling topcoat is further improved.

[0035] Compared with Example 6, the water-based one-component self-polishing ship antifouling paints prepared in Examples 7 to 9 have better antifouling effects, indicating that loading dichlorooctyl isothiazolinone onto the modified inorganic nanoparticles further improves the antifouling effect of the self-polishing antifouling topcoat.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-based one-component self-polishing ship antifouling paint, characterized in that: The invention comprises the following components in parts by weight: 30-40 parts of organosilicon-modified acrylic resin, 15-25 parts of antifouling agent, 1-4 parts of auxiliary agent, and 15-20 parts of water; The antifouling agent comprises modified inorganic nanoparticles and dichlorooctylisothiazolinone in a mass ratio of 19:1 to 11; The modified inorganic nanoparticles are inorganic nanoparticles coated with imidazole compounds.

2. A water-based one-component self-polishing ship antifouling paint according to claim 1, characterized in that: The preparation method of the antifouling agent comprises the following steps: The imidazole compound is dissolved, mixed with inorganic nanoparticles, and dried to obtain inorganic nanoparticles coated with the imidazole compound; The imidazole compound-coated inorganic nanoparticles and dichlorooctylisothiazolinone are mixed to obtain an antifouling agent.

3. A water-based one-component self-polishing ship antifouling paint according to claim 1, characterized in that: The imidazole compound includes 4-imidazolecarboxamide or imidazole-4-sulfonyl chloride.

4. A water-based one-component self-polishing ship antifouling paint according to claim 1, characterized in that: The mass ratio of the modified inorganic nanoparticles to the dichlorooctyl isothiazolinone is 19:5-9.

5. A water-based one-component self-polishing ship antifouling paint according to claim 4, characterized in that: The preparation method of the antifouling agent comprises the following steps: The imidazole compound is dissolved and then mixed with inorganic nanoparticles, and then dichlorooctyl isothiazolinone is added and dried to obtain an antifouling agent.

6. A water-based one-component self-polishing ship antifouling paint according to claim 2 or claim 5, characterized in that: The mass ratio of the imidazole compound to the inorganic nanoparticles is 1-4:10; The solvent for dissolving is ethanol with a volume fraction of 70% to 80%.

7. A water-based one-component self-polishing ship antifouling paint according to claim 1, characterized in that: The inorganic nanoparticles include one or both of titanium dioxide and mica powder.

8. A water-based one-component self-polishing ship antifouling paint according to claim 1, characterized in that: The auxiliary agent includes at least one of a dispersant and a defoamer.

9. The method for preparing a water-based one-component self-polishing ship antifouling paint according to any one of claims 1 to 8, characterized in that: The following steps are involved: The components of the water-based one-component self-polishing ship antifouling paint are mixed to obtain the water-based one-component self-polishing ship antifouling paint.

10. Use of the water-based one-component self-polishing ship antifouling paint according to any one of claims 1 to 8 or the water-based one-component self-polishing ship antifouling paint prepared by the preparation method according to claim 9 in ship antifouling.

Images