| Due to the excellent weather resistance, water resistance and film formingproperty, acrylic emulsion is widely used in adhesives, coatings, inks industry, butits application in ink-receptive coating is still blank. Therefore, this paper focuseson the application of acrylate emulsion in absorbing coatings.With n-butyl acrylate (BA), methyl methacrylate matrix (MMA) as mainmonomer, acrylic acid (AA) as functional monomer, allyloxy polyoxyethylene fattyalcohol ether sulfate (SR-10) as reactive anion emulsifier and ER-20complex asreactive nonionic emulsifiers, an acrylic emulsion with high-performance issynthesized by means of semi-continuous seed-core-shell polymerization. Theeffects of monomer ratio, emulsifier ratio and content, initiator dosage andmonomer dropping rate on emulsion performance are investigated, and theinfluences of core-shell ratio, Tgof core layer and shell layer and coating thicknesson ink absorption properties and film forming properties of of the coating are alsostudied. Furthermore, the emulsion polymer is characterized by infraredspectroscopy (FTIR), differential scanning calorimetry (DSC), particle size analyzerand transmission electron microscopy (TEM).It is found that, a blue-light glowing, fine and smooth emulsion with highconversion rate and good stability can be obtained when the reaction parameters areas following, the reaction temperature being82℃, the stirring speed being200r/min~250r/min, the dropping time of pre-emulsion being3to4hours, the corelayer Tgbeing-11.2℃, the shell Tgbeing48.4℃and the ratio of core-shell being2/1. The optimum ink absorbing property can be reached when the coating thicknessis21μm, and the water resistance and film forming property are excellent at thesame time. FTIR results show that the two main monomers are copolymerized wellwith each other, and monomer conversion is high. DSC tests indicate that thepolymer has two distinct glass transition temperatures, which correspond to thedesigned Tgs well，thus verifying the core-shell structure of latex particles. Latexparticle size analysis tests show that the average particle size is111nm，and TEMresults show that the latex particles are uniformly spherical, and particle sizedistribution is uniform too. |
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