Use of polymer powders that are redispersible in water as a binding agent for jointing sand

摘要

Dry jointing sand which is swept into joints is consolidated by addition of a powder composition employing either a polyvinyl alcohol-stabilized redispersible polymer powder which contains functional post-crosslinking comonomers, or a redispersible polymer powder stabilized by a polymer of one or more ethylenically unsaturated mono- or dicarboxylic acids and/or anhydrides thereof. The sand is bonded within the joints upon contact with moisture.