Particulate polymer and preparation process thereof

A process for preparing a particulate polymer by the agglomeration of polymer particles contained in a polymer latex obtained by emulsion polymerization, said polymer being a 5-80 wt. % elastomer component containing copolymer and said particulate polymer being composed of primary particles and/or secondary particles, said primary particles being in the form of a compact mass substantially free of voids and having particle sizes of at least 20 .mu.m and said secondary particles being formed by the agglomeration of at least some of said primary particles, which process comprises:

• mixing by stirring or shaking a mixture of the polymer latex having a solids content of 5-60 wt. % with an amount of a coagulant sufficient to coagulate the polymer latex and an organic liquid having low solubility in water and being capable of dissolving at least one homopolymer of the individual monomers constituting the polymer which solvent is a member selected from the group consisting of aromatic hydrocarbons, alkyl substituted derivatives thereof, halogenated hydrocarbons and isobutyl ketone, wherein the volume proportion of the polymer in the entire mixture is 3% or higher and the organic liquid is mixed in an amount of 3-40 parts by weight per 100 parts by weight of the polymer solids container in the polymer latex.