AQUEOUS ADHESIVE AND COATING FORMULATIONS

摘要

An aqueous polymer dispersion is provided to produce films having high tensile shear strength and a waterproof property, short film forming time and film drying time, and high thermal stability. An aqueous polymer dispersion comprises (a) at least one dispersion containing polyvinylacetate and/or at least one polyvinylacetate copolymer, and (b) at least one aqueous silicon dioxide dispersion containing SiO2 particles having an average particle size of 1-400 nm. The SiO2 particles are present as non-crosslinked individual primary particles. The polyvinylacetate and/or polyvinylacetate copolymer particles have an average particle size of 70-300 nm. The aqueous polymer dispersion further contains (c) OH-containing oligomers or polymers.