Redispersibility of Acrylate Polymer Powder and Stability of Its Reconstituted Latex

Abstract

The acrylate redispersible polymer powder (RPP) was produced from acrylate latex via spray drying, which was synthesized by latex polymerization with the configuration of soft core and hard shell. The powder's redispersibility and stability of its reconstituted latex were achieved through incorporating monomer methacrylic acid (MAA), which has functional carboxyl group and can provide an ionization effect in alkaline range. The influence of pH value and MAA amount on the redispersibility and stability were studied. The stabilization mechanism for reconstituted latex was also investigated. The acrylate RPP has good redispersibility at MAA of 4–5% and pH values between 9.0 and 10.0. The reconstituted latex is stable at these conditions due to high zeta potential and strong electrostatic repulsion force.

Keywords:

• Acrylate redispersible polymer powder
• reconstituted latex
• redispersibility
• stabilization mechanism
• zeta potential

Acknowledgments

The authors gratefully acknowledge the financial fund of National Natural Science Foundation of China (50803017).

Notes

Note: Total monomer is 300 g. MAA amount is the mass percentage of total monomers. Core and shell monomer mixture are 200 g and 100, g respectively.