Effects of Adopol EVS-9279X on the emulsion and film properties of poly (vinyl acetate) and acrylic resin

Abstract

The effects of Adopol EVS-9279X on the emulsion and film properties of poly (vinyl acetate) and acrylic resin were investigated using 5% - 10% w/w sample formulations. Results indicate that Adopol EVS-9279X increased the surface tension of poly (vinyl acetate) from 2.060 x 10-3Nm-1 to a maximum of 8.966 x 10-2 Nm-1 at 9% w/w formulation and reduced same for acrylic resin from 3.988 x 10-2Nm-1 to 2.702 x 10-2Nm-1 at 6% - 7% w/w formulations. It lowered the solid content of poly (vinyl acetate) and acrylic resin from 38.2% to 33.3% and 45.8% to 41.8% respectively at 10% w/w formulation. Water resistance was improved by a reduction in water absorption from 45.8% to 38.5% minimum for poly (vinyl acetate) and 37.2% to 34.0% minimum for acrylic resin at 5% w/w formulation. Drying time was reduced from 74 minutes to 51 minutes at 5% w/w formulation for poly (vinyl acetate) and 68 minutes to 58 minutes at 7% w/w formulation for acrylic resin. Specific gravity was lowered from 1.05 to 0.91 at 6% w/w formulation for acrylic resin, while pH was lowered at low concentration from 4.70 to 4.49 at 6% w/w formulation for poly (vinyl acetate) and 8.86 to 8.50 at 9% w/w formulation for acrylic resin. Apparent viscosities and flexibility were unaltered within the concentration range of 5% - 10% w/w formulation studied for both polymers. Key Words: Emulsion, Adopol EVS-9279X, Polymer. Global Jnl Pure & Applied Sciences Vol.10(2) 2004: 307-314