Abstract: A water-based wax-free stable emulsion composition, useful as water sealer for wood, concrete and porous materials is disclosed. The water-based sealer composition forms a non-drying film that is water-repellant, flexible, self-sealing and allows passage of water vapor. The water-based sealer composition contains less than 400 grams per liter of volatile organic compounds. The water-based sealer composition is especially suited for above-grade applications in that it protects against absorption of water.

Abstract: Method for homogenizing a monomer mix for making latexes, such as polyvinyl chloride latexes, comprising pumping the mix to a shearing means, shearing said mix by means of the rotating shearing means having multiple shearing surfaces while conveying it into rotating channels in the shearing means where the mix is subjected to centrifigal forces, conveying the mix from the rotating channels into stationary channels, repeating the preceding steps at least once, conveying the mix into a chamber which completes the first stage of a homogenizer, conveying the mix from the first stage through at least one more stage, recirculating the mix through the first stage and the additional stage or stages 3 to 25 times, and then conveying the mix to the polymerization reactor where the latex of improved colloidal stability is obtained as determined by a drastic reduction in polymer build-up on reactor interior and coagulum in the latex.