| 简介 |
FIELD : usage of polymeric powder compositions redispersed in water and designed for promoting setting of chemical products used in building with hydraulic settable binders.
SUBSTANCE : powder composition is prepared on base of a) homopolymers or copolymers of one or several monomers selected from group including vinyl ethers of non-branched or branched alkyl carboxylic acids with 1 - 15 C atoms, ethers of metacrylic acids and ethers of acrylic acid and alcohols with 1 - 15 C atoms, vinyl aromatic compounds, olefins, dienes and vinyl halides; b) one or several protection colloids; c) optionally with use of means preventing caking; d) promoters of setting including one or several compounds selected from group of salts of non-organic or organic acids with alkali or alkali-earth metals except calcium carbonate and magnesium carbonate. Such redispersed powder compositions feature good looseness, redispersing capability and improved resistance against caking. Used in building chemical products modified with powder compositions according to invention such as adhesives for cementing tiles, compositions for applying decorative, leveling and protective coatings, plasters, solutions for uniting and so on feature enhanced cohesion at tensioning when soaked in wet atmosphere.
EFFECT : enhanced looseness, improved resistance of powder compositions against caking, high cohesion at tensioning in wet atmosphere of chemical products modified by such compositions and used in building.
8 cl, 2 tbl |
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