| As long as the opening up and utilization people have done to the ocean, antifouling technology has been put into practice in an extended area. Antifouling coating is the most nature, economical and widely used method among all the solutions proposed throughout the history of navigation. Tributyltin self-polishing copolymer paints (TBT-SPC paints) have been the most successful in combating biofouling on ships. The widespread use of these paints has led to important economic benefits for many years. Unfortunately, the TBT-SPC systems affect adversely the marine environment and even human health. Furthermore, after an International Convention held on 5th October 2001, parties to the convention are required to ban the application of TBT-based antifouling paints from 1 January 2003, and the presence of such paints on the surface of the vessel from 1 January 2008. The traditional antifouling paints contain a large amount of VOCs, which not only do harm to workers but also pollute the air. Under the VOC regulations, the traditional coatings would be replaced by novel coatings. Thus, the paint industry has been urged to develop TBT-free, non-toxic, highly-efficient and environmentally friendly products able to replace the traditional ones but yield to the same economic benefits and cause less harmful effects on the environment.Based on the core-shell emulsion theory, this paper has designed the formula for acrylic emulsion with core-shell structure, including the choice of soft monomer and hard monomer and the ratio of them, the amount of emulsifying agent crosslinking agents, the shell composition and other assistant ingredients and the formula methods. Through the test results for the core-shell emulsion properties, this paper discusses the factors which affect the core-shell emulsion and then get the best solution for the core-shell emulsion. After that, the structure characterization of latex particles by means of TEM was carried out and other emulsion properties were tested. The results indicated that using method here could produce the more ideal core-shell emulsion both structurally functionally.In order to getting core-shell emulsion which can meet the requirement of waterborne antifouling paints, reactive emulsifier and compound emulsifier system were used. The influence of reactive emulsifier on emulsion performances was discussed in this paper. Tested results of emulsion suggest that the reactive emulsifier can be used to prepare stable nano-scale emulsion, which will further formulate a good water resistant coatings film.Based on pigment volume concentration (PVC), this paper has made up the formula ingredients for antifouling coatings, including the choice of resin, pigments, additives and et al. This paper choose core-shell acrylic emulsion as resin, iron oxide red, zinc oxide, talcum powder, cuprous oxide, bentonite clay as pigments and fillers, poly-sodium salt as the wetting and dispersing agent, hydroxyethylcellulose as the thickening agent, Dow Corning 65 additive as the antifoaming agent, alcohol ester-12 as the film-forming additive, water as solvent. Then, a series of antifouling coatings with different pigment volume concentrations (PVC) were prepared. This paper discusses the impact of PVC on conventional properties and picks out the basic prescription with a good performance:B-AFC3, which provides the proofs for production of antifouling paints containing algae extraction.Finally, waterborne antifouling paints containing algae extraction were prepared according to basic formula and preparation process that had been selected. Then, through the tests for its anti-diatom growth ability and anti-mussel secreting byssi ability, it proves and makes sure the waterborne antifouling paints containing algae extraction when the composition of algae extraction is 5.4%, the antifouling effect is better.
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