Covestro Deutschland Ag

Hans-Juergen Thiem

Andreas Seidel

Eckhard Wenz

Michael Erkelenz

Reiner Rudolf

Hans-Juergen Klankers

Ingmar Hermsdorfer

Birgit Mannel

Lars Frye

Hartwig Kempkes

Martin Doebler

The invention relates to a method for producing compositions containing vinylaromatic copolymers which are obtained in an emulsion polymerization process and comprise production-related salt inclusions. Said compositions are characterized by an improved surface quality once the extruded polymer, before being granulated, or the granulate, after being granulated, has been moistened by bringing the polymer in contact with liquid water in a water bath, a tube system filled with water, or a dipping tank, thus making the compositions suitable for producing molded articles having a class A surface that remains flawless over time.

Method for the production of ABS compositions having an improved surface

The invention relates to a method for producing compositions containing vinyl-aromatic copolymers that are obtained in an emulsion polymerization process and comprise production-related salt inclusions. Said compositions are characterized by improved surface quality following storage in a warm-humid environment and are therefore suitable for producing molded articles having a class A surface that remains flawless over time.

Method for the production of ABS compositions having an improved surface following storage in a warm-humid environment

The invention relates to polymer compounds containing A) 0 to 98 parts by weight, based on the sum of A and B, of a thermoplastic polymer, or a mixture of a plurality of thermoplastic polymers differing from B, and B) 2 to 100 parts by weight, based on the sum of A and B, of B 1) at least one graft polymer produced by an emulsion polymerisation process, B2) optionally at least one graft polymer produced in a mass, suspension or solution polymerisation process, B3) optionally at least one rubber-free vinyl (co)polymer and (C) 0 to 30 parts by weight of at least one commercially available polymer additive, wherein the total of parts by weight A and B is 100.

Emulsion polymer containing compounds with improved surface after storage under warm and humid storage

The present invention relates to a process for the preparation of stabilized impact-modified polycarbonate compositions using dilute aqueous acidic solutions, and to the compositions so prepared themselves.

Method for the production and stabilization of impact-modified polycarbonate compositions using diluted solutions of acidic compounds

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Dormagen, Germany

Hans-Juergen Thiem