Process for the removal of residual monomers from ABS polymers
AssigneeBayer Aktiengesellschaft
InventorsGert Humme, Horst Plato, Karl-Heinz Ott, Friedrich Kowitz, Peter Hagenberg
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Abstract
Process for the removal of residual monomers from ABS polymers prepared by emulsion polymerization, wherein from 0.1 to 10% by weight, based on the solids content in the latex, of an electrolyte such as an acid or a salt are added to a latex containing an ABS polymer, and the mixture is at the same time heated to a temperature of from 55.degree. to 120.degree. C. while the residual monomer and part of the water are removed by distillation.
Claims1
Process for recovering ABS polymers from a latex prepared by emulsion polymerization with simultaneous removal of residual monomers, which consisting essentially of:
- (a) adding to the latex 0.1 to 10% by weight, based on the solids content, of an electrolyte selected from acids and salts,
- (b) simultaneously heating the mixture to about 55.degree. to 120.degree. C. to cause coagulation, and
- (c) then distilling off part of the water, together with the residual monomers thereby removing residual monomers.
Dependencies are inferred from the claim text.