| 摘要 |
The invention relates to a redispersible powder composition comprising a) a base polymer from the group comprising vinyl ester polymers, styrene polymers, acrylate polymers and vinyl chloride polymers, b) 2 to 15% by weight, relative to the base polymer, of polyvinyl alcohol having a degree of hydrolysis of 85 to 94 mol % and a Höppler viscosity of 2 to 25 mPaxs, c) 3 to 30% by weight, relative to the total weight of polymer components, of a fine antiblocking agent, d) 0.1 to 2% by weight, relative to the base polymer, of antifoams, which contains e) 1 to 8% by weight, relative to the base polymer, of a fully hydrolyzed 1-alkylvinyl ester/vinyl ester copolymer having a Höppler viscosity of 1 to 5 mPaxs. The redispersible composition according to the invention is suitable in particular for use in flowing, hydraulically setting leveling compounds. Further areas of application for the redispersible powder composition according to the invention are its use in building adhesives, mortars, as an additive to gypsum, and in plasters and emulsion paints.
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