Title:
水添ブロック共重合体の炭化水素溶媒溶液から炭化水素溶媒を除去する方法
Document Type and Number:
Japanese Patent JP4737737
Kind Code:
B2
Abstract:
Disclosed is a method for removing a hydrocarbon solvent from a hydrocarbon solvent solution of a hydrogenated block copolymer which is obtained by hydrogenating a 'block copolymer comprising a polymer block composed mainly of vinyl aromatic monomer units and a polymer block composed mainly of conjugated diene monomer units, wherein the weight ratio of the vinyl aromatic monomer units to the conjugated diene monomer units is from 5/95 to 95/5, wherein the hydrogenated block copolymer has a degree of hydrogenation of 30 % or more with respect to double bonds in the conjugated diene monomer units, and wherein the method comprises: (1) mixing a hydrocarbon solvent solution of the hydrogenated block copolymer with heated water to obtain a dispersion of the solution in the heated water, and (2) introducing the dispersion into a steam stripping vessel containing heated water, wherein the dispersion is spouted into the gaseous phase in the vessel toward the surface of the heated water in the vessel under conditions wherein the vapor pressure P1 of the dispersion and the pressure P2 of the gaseous phase in the vessel satisfy the formula: P1 ≥ P2 , thereby effecting a steam stripping of the dispersion to remove the solvent therefrom and obtain porous crumbs of the hydrogenated block copolymer.
Inventors:
Hakke Atsushi
Yasumasa Yamakoshi
Kamaya
Yasumasa Yamakoshi
Kamaya
Application Number:
JP2001533855A
Publication Date:
August 03, 2011
Filing Date:
October 27, 2000
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C08F6/12; C08F8/04; C08F297/04; C08L53/02
Domestic Patent References:
| JPS58147406A | 1983-09-02 | |||
| JPH02185503A | 1990-07-19 | |||
| JPH0465082A | 1992-03-02 | |||
| JPH02182703A | 1990-07-17 | |||
| JPS4829392B1 | 1973-09-10 | |||
| JPH0218321B2 | 1990-04-25 | |||
| JPH08301929A | 1996-11-19 |
Foreign References:
| WO1999055752A1 | 1999-11-04 |
Attorney, Agent or Firm:
Norio Kagami
Masami Sakai
Jun Komatsu
Masami Sakai
Jun Komatsu