Polyvinyl Acetate and Vinyl Acetate Ethylene Emulsion Polymerization Overview (PPT)

摘要

1. VA Homopolvmer - Atmospheric reaction - High degree of order/structure - High cohesive strength - High Tg, +35°C - Hard, stiff film - High tensile / low elongation - Higher MFFT - Limited adhesion - Solids typically 55% - Good wet tack and set speeds - Good to no water resistance 2. VAE Copolymer - High pressure reaction - Less order/structure - Lower cohesive strength - Wide Tg range, +20 to -30°C - Firm to very soft films - Range of tensile / elongation - Lower MFFT - Wider range of adhesion - Solids 55% to 72% - Good wet tack and set speeds - Excellent to no water resistance.