| Abstract:Using styrene (St) and methyl methacrylate (MMA) as the hard monomers, butyl acrylate(BA) as the soft monomer, N-hydroxyl methylacrylic acid amide(N-MA) as self-crosslinkable monomer, acrylic acid(AA) and α-methacylic acid(MAA) as functional monomers, stable self-crosslinking styrene-acrylate copolymer emulsion was prepared by the per-emulsified seeded emulsion polymerization method. The effect of dosages of styrene, emulsifier, self-crosslinkable monomer and functional monomers on the bibulous rate of the film formed by the emulsion was studied. The experiment results indicated that when the monomer mass ratio (BA)/(St+MMA) was 0.9~1.1, dosage of St was 25%~27%, dosage of emulsifier was 1.5%~2.5%, proportion of anion and nonionic emulsifier was 1∶1, dosage of N-MA was 2.5%, both dosages of AA and MAA were 0.5%, the conversion rate was over 95%, and the film was smooth, transparent and no bubbles. |
