Abstract: Redispersible polymer powder compositions which include a polyglycol in admixture with a redispersible polymer powder (RDP), which powder includes a codried mixture of a carboxylated, water insoluble film-forming styrene butadiene polymer and a colloidal stabilizer, results in cement compositions having unexpectedly superior overall bonding strength and adhesion after water immersion. Use of the polyglycol provides good workability or ease of troweling during application. In addition, the RDP composition, which includes the RDP and the polyglycol, provides the cement-based composition with excellent abrasion resistance, surface appearance, and color. Also, the RDP composition provides for at least a 30% reduction, for example a 50% or more reduction in the amount of retarder or retardant employed in the dry mix formulation for cement compositions, such as self leveling flooring compounds or compositions, and cement-based tile adhesives.

Abstract: The invention concerns well dispersible powders on the basis of carboxylated copolymers containing butadiene made of styrene and/or acrylonitrile, whose films taken from redispersion show good tensile strength. According to the invention, the latices are sprayed with mixtures of spraying aids consisting of 1 to 15 weight % of a salt of the alkylated di-phenyl-ether-di-sulphonic acid, caseinate and/or N-alkyl sulphosuccinamide and/or with 1 to 20 weight % of a di- or tetra sodium or potassium salt of an addition product from N-alkyl sulphosuccinamates with maleic acid mixed together with polyvinyl alcohol. The dispersions can be used especially in the construction industry and they offer an alternative to copolymers on the basis of polyvinyl acetates and acrylates.

Abstract: Hydroxamic acids, pharmaceutical preparations containing the same, new .omega.(2'-naphthoxy)-alkylhydroxamic acids as well as a process for their production are disclosed. The new compounds display antiasthmatic and further pharmacologically valuable characteristics. They are prepared by reacting the corresponding carboxylic acid ester or amide with hydroxylamine or its salt under the described conditions into compounds of Formula I,R--CO--NH--OH.The compounds of Formula I are useful in human and veterinary medicine as medicaments the active principal of which is the inhibition of lipoxygenase, thus as antiasthmatic, antianaphylactic, antiphlogistic, antirheumatic and antithrombotic preparations.