Patent · US Expired

Method for continuous anionic polymerization of impact-resistant polystyrene

US6951901B2 · kind B2 · utility

1Cited by

7References

9Claims

0Family size

Assignee

BASF SE

Inventors

Hermann Gausepohl · Mutterstadt, DE
Jürgen Demeter · Bischofswerda, DE
Philippe Desbois · Maikammer, DE
Christian Schade · Ludwigshafen, DE

Key dates

Filing date	Oct 18, 2002
Grant date	Oct 4, 2005
Priority date	—
Expiry date	Oct 18, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F279/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing impact-resistant molding compositions by anionic polymerization of vinylaromatic monomers in the presence of a rubber, in a continuous-flow reactor cascade composed of at least two reactors, where the vinylaromatic monomers are fed in substreams to the reactors of the reactor cascade, and an anionic initiator and a rubber are fed at least to the first reactor, and where the reactor cascade is composed of back-mixing reactors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.