Fluorine-containing hydroxylpolyacrylate aqueous dispersion with high solid content and preparation method and application thereof
A fluorine-containing hydroxyl polyacrylate, high solid content technology, used in polyurea/polyurethane coatings, biocide-containing paints, antifouling/underwater coatings, etc. To solve problems such as performance, to achieve the effect of excellent solvent resistance, low VOC, and storage stability
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Embodiment 1
[0040] 1) Preparation of high solid content fluorine-containing hydroxyl polyacrylate aqueous dispersion
[0041] In parts by mass, the raw material components and consumption are as follows in Table 1
[0042] Table 1
[0043]
[0044] Preparation: Under nitrogen protection, mix vinyl fluoride monomer, vinyl sulfonate monomer, acrylic monomer, initiator and chain transfer agent to prepare a mixed solution, add 10% of the mixed solution to the reactor, Stir and heat up to 70°C for 30 minutes, add the remaining mixture into the reactor within 4 hours, and keep it warm for 2 hours to obtain a fluorine-containing hydroxyl polyacrylate prepolymer; then lower the temperature to below 50°C, add a neutralizing agent for neutralization, and add water High-speed dispersion was carried out at 1000 rpm at 30°C to prepare an aqueous dispersion.
[0045] Performance of high solid content fluorine-containing hydroxyl polyacrylate aqueous dispersion: solid content is 45%, viscosity (25°...
Embodiment 2
[0057] (1) Preparation of high solid content fluorine-containing hydroxyl polyacrylate aqueous dispersion
[0058] In terms of parts by mass, the raw material components and consumption are as shown in Table 3
[0059] table 3
[0060]
[0061]
[0062] Preparation of vinyl fluoride monomer-modified polyacrylate: under nitrogen protection, mix vinyl fluoride monomer, vinyl sulfonate monomer, acrylic monomer, initiator and chain transfer agent to prepare a mixed solution, Add 10% mixed solution into the reactor, stir and raise the temperature to 75° C. for 30 minutes, add the remaining mixture into the reactor within 4 hours, and keep it warm for 1.5 hours to obtain a fluorohydroxypolyacrylate prepolymer. Then lower the temperature to below 50°C, add a neutralizing agent for neutralization, add water and disperse at a high speed of 1500 rpm at 30°C to obtain an aqueous dispersion.
[0063]Vinyl fluoride monomer-modified polyacrylate aqueous dispersion properties: solid ...
Embodiment 3
[0071] (1) Preparation of high solid content fluorine-containing hydroxyl polyacrylate aqueous dispersion
[0072] In parts by mass, the raw material components and consumption are as shown in Table 5
[0073] table 5
[0074]
[0075] Preparation of vinyl fluoride monomer modified polyacrylate: under nitrogen protection, vinyl fluoride monomer, vinyl silicon monomer, vinyl sulfonate monomer, acrylic monomer, initiator and chain transfer agent Mix to prepare a mixed solution, add 15% of the mixed solution to the reactor, stir and heat up to 75°C for 35 minutes, add the remaining mixture to the reactor within 5 hours, and keep it warm for 1.5 hours to obtain vinyl fluoride monomer-modified Polyacrylate prepolymer. Then lower the temperature to below 50°C, add a neutralizing agent for neutralization, add water at 30°C and perform high-speed dispersion at 2500 rpm to obtain an aqueous dispersion.
[0076] Vinyl fluoride monomer-modified polyacrylate aqueous dispersion prope...
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