Influence of selection of surfactant system on application properties of polymeric dispersions

摘要

Anionic and non-ionic surfactants were evaluated in pure-acrylic and low MFFT (0°C) styrene-acrylic dispersions. Synthesis of dispersions was conducted by seeded emulsion polymerisation. Two types of pure-acrylic dispersions were synthetised -conventional and core-shell type, obtained in two-stage emulsion polymerisation. In the conventional dispersion influence of anionic emulsifier on particle size was evaluated. In the core-shell type impact of emulsifiers on water-resistance and chemical stability of dispersion was tested. Non-ionic surfactants were used in low MFFT styrene-acrylic dispersion in order to evaluate their influence on chemical and freeze-thaw stability of dispersion. Based on synthetised dispersions, samples of high PVC (75.94%) white paint were prepared and their wet-scrub resistance (40 cycles) was analysed.