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CN-118460103-B - Organosilicon marine antifouling paint suitable for static marine facility antifouling

CN118460103BCN 118460103 BCN118460103 BCN 118460103BCN-118460103-B

Abstract

The invention discloses an organic silicon marine antifouling paint suitable for static marine facility antifouling, which is prepared by eliminating active free radical scavenger phenol groups through the reaction of capsaicin and unsaturated anhydride monomers and synthesizing capsaicin unsaturated ester, eliminating polymerization inhibition units for subsequent free radical copolymerization, and then carrying out free radical polymerization on the capsaicin unsaturated ester and unsaturated silane curing agent monomers to obtain a capsaicin modified silane curing agent. In the actual service process of the coating prepared by the coating, particularly in a static seawater environment, the low surface free energy of the coating can inhibit the adhesion of fouling organisms, and simultaneously capsaicin groups can stimulate the fouling organisms, so that the fouling organisms are driven to be far away from the surface of the coating, and the antifouling effect of the coating in static ocean facilities is obviously improved. The coating is particularly suitable for various static marine facilities in a long-term static immersed seawater environment, and can realize pollution control without depending on seawater scouring.

Inventors

  • CHEN LULU
  • Ba miao
  • YANG XUE
  • Feng Dongyu

Assignees

  • 常熟理工学院

Dates

Publication Date
20260505
Application Date
20240430

Claims (10)

  1. 1. The organic silicon marine antifouling paint suitable for static marine facility antifouling is characterized by comprising, by weight, 10-20 parts of a component A, (2) 4-8 parts of a component B and (3) 0.5-1 part of a component C; Wherein, the The component A comprises the following components in parts by weight: 80-120 parts of hydroxyl-terminated polysiloxane resin 1-4 Parts of auxiliary agent Pigment and filler 20-60 parts 60-100 Parts of a first solvent; The component B comprises the following components in parts by weight: 5-10 parts of capsaicin modified silane curing agent 15-30 Parts of a second solvent; The component C comprises the following components in parts by weight: 1-3 parts of catalyst 3-10 Parts of a third solvent; wherein, the capsaicin modified silane curing agent is prepared by the following steps: (1) Uniformly mixing capsaicin and ethanol in equal parts by weight, then adding unsaturated anhydride monomer with the amount which is 2 times that of the capsaicin, keeping a sealed environment, and reacting for 20-40 hours at the temperature of 5-15 ℃ and the speed of 100-200 rpm by using a strong acid solution as a catalyst; (2) Extracting with excessive ethyl acetate, collecting upper organic phase, and evaporating organic solvent to obtain capsaicin unsaturated ester; (3) Under the protection of nitrogen, placing capsaicin unsaturated ester and a silane curing agent with unsaturated groups into a mixed solvent, then adding an initiator azodiisobutyronitrile, uniformly stirring at 50-100 rpm, then heating to 55-70 ℃, reacting for 12-18 h, and drying to obtain the capsaicin modified silane curing agent.
  2. 2. The antifouling paint according to claim 1, wherein the strong acid solution is selected from one of a 2mol/L hydrochloric acid solution and a 2mol/L sulfuric acid solution, and the reaction system has a pH of 2.0 or less when the strong acid solution is used as a catalyst.
  3. 3. The antifouling paint according to claim 1, wherein the weight ratio of the capsaicin unsaturated ester, the silane curing agent having an unsaturated group and the mixed solvent is 1 (4-10): 10-30.
  4. 4. An antifouling paint according to claim 1, wherein the capsaicin is selected from one of cis capsaicin, synthetic capsaicin, and dihydrocapsaicin.
  5. 5. The antifouling paint of claim 1, wherein the unsaturated anhydride monomer is selected from one of acrylic anhydride, methacrylic anhydride, 2-buten-1-yl succinic anhydride, and crotonic anhydride.
  6. 6. The antifouling paint according to claim 1, wherein the silane curing agent having an unsaturated group is selected from one of γ -methacryloxypropyl triisopropoxy silane, γ -methacryloxypropyl methyl dimethoxy silane, 3-methacryloxypropyl trimethyloxy silane.
  7. 7. The antifouling paint according to claim 1, wherein the mixed solvent is formed by mixing ethylene glycol, toluene and acetone according to a weight ratio of 1:1:1.
  8. 8. The antifouling paint according to claim 1, wherein the hydroxyl-terminated polysiloxane resin is selected from one of α, ω -dihydroxypolysiloxane, α, ω -dihydroxypolydimethylsiloxane resin, and has a viscosity of 5000 to 10000 mPa-s.
  9. 9. A method of preparing an antifouling paint according to any of claims 1 to 8, comprising the steps of: (1) Sequentially adding hydroxyl-terminated polysiloxane resin, an auxiliary agent, pigment and filler and a first solvent into dispersing stirring equipment, and then stirring at 100-300 rpm for 30-50 min to obtain a component A; (2) Sequentially adding the capsaicin modified silane curing agent and the second solvent in dispersing stirring equipment, and then stirring at 50-100 rpm for 15min to obtain a component B; (3) And sequentially adding the catalyst and the third solvent in dispersing stirring equipment, and then stirring for 15min at 50-100 rpm to obtain the component C.
  10. 10. An organic silicon marine antifouling coating suitable for static marine facility antifouling, which is characterized in that the antifouling coating according to any one of claims 1-8 is uniformly mixed, and is coated on the surface of a substrate by any one of brushing, spraying or rolling, and the antifouling coating with the film thickness of 150-250 μm is prepared by crosslinking and curing.

Description

Organosilicon marine antifouling paint suitable for static marine facility antifouling Technical Field The invention belongs to the technical field of marine antifouling technology and underwater paint protection, and particularly relates to an organic silicon marine antifouling paint suitable for static marine facility antifouling. Background Marine biofouling is a major problem facing the world's developing marine industry, and painting an antifouling paint is the most effective and convenient method to solve this problem. Traditional marine antifouling paints kill fouling organisms by releasing toxic agents, but at the same time cause damage to marine organisms and even pollution of the marine environment. With the development of the technology level and the improvement of the environmental awareness of human beings, the traditional marine antifouling paint such as organotin and cyclobutanenitrile has been forbidden, and the corresponding environmental marine antifouling paint is developed for human beings, and mainly comprises a pollution release type, a pollution degradation type, a pollution inhibition type and the like. The organosilicon marine antifouling paint belongs to fouling release type environment-friendly marine antifouling paint, and has low surface free energy, does not inhibit the adhesion of marine fouling organisms, but has weak adhesion, and can release the adhered fouling organisms into the marine environment again by means of sea water flushing during navigation, thereby realizing physical environment-friendly antifouling effect. However, the organic silicon marine antifouling paint realizes excellent antifouling, and needs to realize the removal of fouling organisms which adhere infirm by means of high-speed scouring of seawater, so that the related marine antifouling paint is mainly applied to ships running at high speed at present, and has poor application effect in static marine facilities. Disclosure of Invention In order to overcome the defect that the existing fouling release type marine antifouling paint can realize effective antifouling by means of seawater scouring, thereby realizing the application of antifouling to static marine facilities, the invention aims to provide the organic silicon marine antifouling paint suitable for antifouling of the static marine facilities, and the organic silicon marine antifouling paint is characterized in that capsaicin groups are introduced into a curing agent, so that physiological irritation is generated on the surface of a finally cured coating, and fouling organisms are driven to spontaneously depart from the surface of the coating. In addition, capsaicin groups are introduced into the curing agent, and the structure of a siloxane molecular chain with the flexibility of a main chain is not influenced, so that the surface of the finally cured coating still presents excellent low-surface free energy characteristics, the antifouling advantage of the fouling release type antifouling coating still remains, and even if the coating is used for static ocean facilities lack of high-speed scouring of seawater, the coating still presents excellent antifouling effect. For the existence of phenol groups in the capsaicin molecular structure, the phenol groups are active free radical capturing agents, and play a role in polymerization inhibition in free radical copolymerization reaction, so that capsaicin modified silane curing agents cannot be synthesized. In order to solve the problems, the invention firstly esterifies phenol groups in a capsaicin molecular structure, introduces unsaturated groups during the esterification reaction of anhydride, and carries out free radical polymerization reaction through the introduced unsaturated groups and an unsaturated silane curing agent, thereby not only introducing the capsaicin structure into the curing agent, but also not damaging the unsaturated groups in the capsaicin structure, ensuring that the capsaicin modified silane curing agent still has the physiological stimulation effect of capsaicin, and preparing subsequent marine antifouling paint and cured coating based on the esterification reaction. The invention is implemented by the following technical scheme: The organic silicon marine antifouling paint suitable for static marine facility antifouling is characterized by comprising, by weight, 10-20 parts of a component A, (2) 4-8 parts of a component B and (3) 0.5-1 part of a component C; Wherein, the The component A comprises the following components in parts by weight: The component B comprises the following components in parts by weight: 5-10 parts of capsaicin modified silane curing agent 15-30 Parts of a second solvent; The component C comprises the following components in parts by weight: 1-3 parts of a catalyst 3-10 Parts of a third solvent; wherein, the capsaicin modified silane curing agent is prepared by the following steps: (1) Uniformly mixing capsaicin and ethanol in equal parts by weig