Thickeners for aqueous dispersions

   
   

The invention relates to the aqueous preparation of a polymer. Said preparation contains a copolymer consisting of a) 30 to 79.5 wt. % N-vinylpyrrolidone, b) 20 to 69.5 wt. % vinylacetate, c) 0.5 to 25 wt % of a monovinyl ester of a C.sub.4 to C.sub.20 monocarboxylic acid and d) 0 to 40 wt. % of an additional, copolymerisable, ethylenically unsaturated compound.

A invenção relaciona-se à preparação aqueous de um polímero. A preparação dita contem um copolymer % consistindo de N-vinylpyrrolidone dos wt. de a) 30 a 79.5, % do vinylacetate dos wt. de b) 20 a 69.5, peso % de c) 0.5 a 25 de um ester do monovinyl de um C.sub.4 ao ácido C.sub.20 monocarboxylic e wt. % de d) 0 a 40 de um adicional, copolymerisable, composto ethylenically unsaturated.

 
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