A kind of preparation method of organosilicon marine antifouling coating

Abstract

The invention provides a preparation method of organosilicone ocean antifouling paint. The preparation method comprises the following steps: (1) drying porphyra, pulverizing and sieving to obtain porphyra powder, adding in distilled water, soaking at room temperature, placing in an essential oil extractor for distilling to obtain essential oil, and carrying out rotary evaporation concentration to obtain a porphyra extract; (2) uniformly mixing dimethyl silicone oil, PVP, EMA and BA, then adding TBPO, evenly stirring to obtain a monomer solution, adding dichloromethane in a reactor, heating, dropwise adding the monomer solution in the reactor, carrying out insulation reaction, and cooling to room temperature to obtain organosilicone copolymer; (3) pulverizing the organosilicone copolymer, adding in a stirrer, adding a solvent, a defoamer, packing, a coupling agent and a dispersing agent, regulating revolving speed after stirring, adding the porphyra extract, and continuing stirring to obtain a mixture; and (4) adding the mixture obtained from the previous step in a screw extruder, carrying out melt extrusion to obtain an extruded material, cooling, then pulverizing, and sieving. The paint prepared by the invention has good heat storage performance.

Description

Technical field: [0001] The invention relates to an organic silicon coating, in particular to a preparation method of an organic silicon marine antifouling coating. Background technique: [0002] Elemental organic coatings are a general term for coatings with elemental organic polymers as the main film-forming substances, including organic silicon, organic titanium, organic fluorine, organic aluminum, organic zirconium coatings, etc. Among them, silicone resin coatings have the largest output. Elemental organic coatings are a compound between organic polymers and inorganic compounds. They have special thermal stability, insulation, high temperature resistance, chemical resistance, water resistance, weather resistance and other characteristics, and are widely used in the defense industry. , electrical industry and other industries. [0003] Silicone resin coating is a coating with silicone resin or modified silicone resin as the main film-forming material, which belongs to e...

AI Technical Summary

Problems solved by technology

①Cold-mixed silicone coating refers to the coating made by mixing silicone resin with other organic resins. Resins with good miscibility include phenolic resin, methacrylic resin, amino resin, alkyd resin, epoxy resin , polyester resin, and ethyl fiber resin. After these resins are added, the curing temperature of the coating will decrease and the mechanical strength will increase; Coatings prepared by mixing, the adhesion, solvent resistance, flexibility, and color retention of this type of coatings are stronger than those of cold-mixed coatings, but the heat resistance is reduced

However, the antifouling agents used in this coating are cuprous oxide and copper pyrithione, which are toxic to a certain extent and cause damage to the marine environment, which is not environmentally friendly.

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