Title:
PROCESS FOR PRODUCING POLYMER
Document Type and Number:
WIPO Patent Application WO/2006/008902
Kind Code:
A1
Abstract:
Resin particles or resin pellets of a polymer, especially an isobutylene block copolymer, are obtained while attaining a reduction in residual solvent amount in the product. In the process, a monohalogenated hydrocarbon solvent in a stripping step is inhibited from decomposing and thus yielding an alcohol in order that the solvent to be recovered can be reused. The solvent of a polymer solution is a mixed solvent comprising a C3-8, primary and/or secondary, monohalogenated hydrocarbon and an aliphatic and/or aromatic hydrocarbon. Before resin particles are obtained from the solution containing an isobutylene block copolymer and obtained after polymerization and catalyst deactivation/removal, a surfactant and water are added to the solution and this mixture is heated to remove the solvent with stirring for liquid-liquid dispersion. In this step (1), the actual pressure of the gas phase part in the tank is regulated so as to be in a specific range.
Inventors:
YOSHIMI TOMOYUKI (JP)
FURUKAWA NAOKI (JP)
FURUKAWA NAOKI (JP)
Application Number:
PCT/JP2005/011332
Publication Date:
January 26, 2006
Filing Date:
June 21, 2005
Export Citation:
Assignee:
KANEKA CORP (JP)
YOSHIMI TOMOYUKI (JP)
FURUKAWA NAOKI (JP)
YOSHIMI TOMOYUKI (JP)
FURUKAWA NAOKI (JP)
International Classes:
C08F6/12; (IPC1-7): C08F6/12
Foreign References:
| JP2004155880A | 2004-06-03 | |||
| JP2002030192A | 2002-01-31 | |||
| JPS4818375A | ||||
| JPS5725309A | 1982-02-10 | |||
| JP2004269711A | 2004-09-30 |
Attorney, Agent or Firm:
KANEKA CORPORATION (Kita-ku Osaka-sh, Osaka 88, JP)
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