| abstract |
i) wenigstens ein vinylaromatisches Monomer (a), ii) 1,3-Butadien als Monomer (b) und iii) ein oder mehrere von den Monomeren (a) und (b) verschiedenenMonomere (c) nenthält, das dadurch gekennzeichnet ist, dass man die wässrigenPolymerisatdispersion in Anwesenheit von Polyvinylalkohol alsnTrocknungsmittel trocknet.The present invention relates to a process for the preparation of polymer powders from aqueous polymer dispersions, in which the dispersed polymer P is in copolymerized form i) at least one vinyl aromatic monomer (a), ii) 1,3-butadiene as monomer (b) and iii) one or more monomers (c) different from the monomers (a) and (b) contains, which is characterized in that the aqueous polymer dispersion is dried in the presence of polyvinyl alcohol as a drying agent.n n n The present invention also relates to those by this methodnavailable polymer powder and the use of this polymer powdernas a binder in paints, in coating compositions,nin paints, in adhesives and for modifying mineralnBuilding materials. The present invention also relates to mineralnBuilding materials in the form of dry preparations that the inventionnContain polymer powder. |