Parexgroup Sa

Parex Usa, Inc.

Sika Technology Ag

Pedro Paredes

Paulo Goncalo

Véronique Dantin

Carlos Nones

Gerard Leplay

Veronique Dantin

Gérard Lepley

The invention relates to improved non-efflorescing cement-free and water-dispersible powder building material compositions comprising a homopolymer or copolymer as binder, useful for the preparation of wet formulations of plasters grouts, waterproofing coatings or mortars for the construction and the civil engineering industry. The binder is obtained by spray-drying or lyophilization of a dispersion containing a polymer and a protective colloid. These compositions also comprise a deprotection agent and a specific adsorbent filler. The invention also refers to the methods of preparation of these dry compositions and wet formulations, the application of these latter onto the surface of buildings or civil engineering works, the so obtained coatings as well as the so coated elements. The hardened products obtained therefrom are remarkably water-resistant, non efflorescent and easy to obtain.

Redispersible dry composition of polymer finishes or other products for the construction

A dry powder composition for preparing a dry form of an acrylic finish is provided. The dry powder composition includes: calcium carbonate filler, coalescing aid, pH adjuster, and an acrylic-based re-dispersible polymer in powder form. In various embodiments, aggregate, silica sand, titanium dioxide, cellulose thickener, biocide, clay, cellulose fiber, mica filler, and/or defoamer are added. The dry powder composition can further comprise a hydrophobic agent. The dry powder can be mixed with a volume of water to produce a wet coating for application to a substrate.

Dry powder polymer finish

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Riverside, CA, United States of America

Pedro Paredes