公开(公告)号：JPH0859734A

公开(公告)日：1996-03-05

申请号：JP19161294

申请日：1994-08-15

Applicant: DAICEL CHEM

Inventor： OSHINO YASUHIRO ,  OTSUKA YOSHIHIRO

IPC: C08F6/00 ,  C08F8/08 ,  C08F236/00 ,  C08F236/10 ,  C08G59/32 ,  C08G59/34

Abstract: PURPOSE: To obtain a copolymer suitable as a modifier (auxiliary) of a rubber or resinous polymer by subjecting an organic solvent sludge or an organic solvent of an epoxidized block copolymer to steam stripping in the presence of a surfactant. CONSTITUTION: This method for recovering an epoxidized block copolymer is to recover the copolymer by carrying out steam stripping of an organic solvent slurry or an organic solution of epoxidized block copolymer synthesized by epoxidizing (A) a polymer block composed mainly of a vinyl aromatic hydrocarbon compound and (B) a block copolymer comprising a polymer block composed mainly of a conjugated diene compound in the presence of a surfactant comprising a nonionic surfactant, preferably having 10-19 of HLB value. Furthermore, the surfactant is used in an amount of 1-20000ppm (especially preferably 10-500ppm) based on water in a steam stripping tank.

公开(公告)号：JPH0625402A

公开(公告)日：1994-02-01

申请号：JP12567991

申请日：1991-03-07

Applicant: DAICEL CHEM

Inventor： OSHINO YASUHIRO ,  SUGANO TATSUYA

IPC: C08G64/06 ,  C08G64/20 ,  C08G64/30

Abstract: PURPOSE:To obtain a colorless, transparent, high-molecular polycarbonate without using COCl2 by polycondensing a given phenol with a carbonic diester in the presence of specific catalysts. CONSTITUTION:A dihydric phenol (e.g. 2,2-bis(4-hydroxyphenyl)propane) is polycondensed with a carbonic diester (e.g. diphenyl carbonate) in the presence of a catalyst selected from among basic nitrogen compounds (e.g. 4- dimethylaminopyridine) and another catalyst selected from among compounds generating a benzyl carbanion which are represented by the formula (wherein R1 is H, a 1-5C alkoxy, or nitro; R2 and R3 each is H, a 1-5C alkyl, or phenyl; and M is an alkali (or alkaline earth) metal).

公开(公告)号：JPH05156000A

公开(公告)日：1993-06-22

申请号：JP32579191

申请日：1991-12-10

Applicant: DAICEL CHEM

Inventor： OSHINO YASUHIRO ,  YAMATO TSUTOMU

IPC: C08G64/30 ,  C08G64/20

Abstract: PURPOSE:To obtain a thermally stable polycarbonate by limiting the concentration of a monohydric phenol contained in a polycarbonate produced by a given process. CONSTITUTION:The objective polycarbonate is obtained by the melt polycondensation of a dihydroxy compound [e.g. 2,2-bis(4-hydroxyphenyl)propane] and a carbonic diester (e.g. diphenyl carbonate) in the presence of a transesterification catalyst (e.g. 4-dimethylaminopyridine) according to the transesterification process, wherein the concentration of a monohydric phenol contained is limited to 1000ppm or less. Further, preferably, the concentration of the dihydroxy compound as the starting material is limited to 1000ppm or less.

公开(公告)号：JPH051145A

公开(公告)日：1993-01-08

申请号：JP18192291

申请日：1991-06-25

Applicant: DAICEL CHEM

Inventor： OKANO YOSHIMICHI ,  OSHINO YASUHIRO

IPC: C08G64/20 ,  C08G64/30

Abstract: PURPOSE:To obtain a colorless polycarbonate having high molecular weight and soluble in solvent such as methylene chloride by ester interchange reaction. CONSTITUTION:A polycarbonate is produced from a dihydric phenol such as 2,2-bis(4-hydroxyphenyl)propane and a carbonic acid diester such as diphenyl carbonate in the presence of a catalyst by an ester interchange process. The catalyst is composed of an electron-donative amine compound and at least one kind of compound containing an element selected from group IIb, IVb and Vb elements of the periodic table, e.g. Sb, Bi, Sn, Pb, Zn or Cd.

公开(公告)号：JPH0488017A

公开(公告)日：1992-03-19

申请号：JP20439490

申请日：1990-08-01

Applicant: DAICEL CHEM

Inventor： YAMATO TSUTOMU ,  OSHINO YASUHIRO

IPC: C08G64/20

Abstract: PURPOSE:To obtain the subject high-molecular weight colorless and transparent polycarbonate suitable for injection molding by carrying out ester interchange reaction using a material having a specific content or below of iron as a material for a reactor. CONSTITUTION:(A) A dihydric hydroxy compound and (B) a bisaryl carbonate are subjected melt polymerization in the presence of an ester interchange catalyst according to an ester interchange method. In the process, a material (e.g. Monel metal) with

公开(公告)号：JPH0477549A

公开(公告)日：1992-03-11

申请号：JP18638990

申请日：1990-07-13

Applicant: DAICEL CHEM

Inventor： SUGANO TATSUYA ,  OSHINO YASUHIRO

IPC: C08K5/13 ,  C08K3/00 ,  C08K5/00 ,  C08K5/51 ,  C08L69/00

Abstract: PURPOSE:To obtain a high-molecular weight polycarbonate excellent in thermal stability, hue and hydrolysis stability by incorporating an aromatic polycarbonate polymer with each specific phosphorus compounds and hindered phenol compound. CONSTITUTION:The objective polycarbonate can be obtained by incorporating (A) a polycarbonate produced by ester interchange reaction in the presence of an ester interchange catalyst (e.g. hydrogenated boron potassium) between (1) a dihydric hydroxyl compound [e.g. 2,2-bis(4-hydroxyphenyl)propane] and (2) a bisaryl carbonate (e.g. diphenyl carbonate) followed by melt polycondensation with each 0.01 - 0.5 (pref. 0.03 - 0.3)wt.% of (B) two or more kinds of phosphorus compound of formulas I - V (R1 is 1-30C hydrocarbon group) and (C) a hindered phenol compound of formula VI (R2 is 1-30C hydrocarbon group).

公开(公告)号：JPH03140324A

公开(公告)日：1991-06-14

申请号：JP27904889

申请日：1989-10-26

Applicant: DAICEL CHEM

Inventor： SUGANO TATSUYA ,  OSHINO YASUHIRO

IPC: C08G64/20 ,  C08G64/30

Abstract: PURPOSE:To obtain the subject colorless and transparent product having high molecular weight and free from chlorine ion without using toxic phosgene by carrying out melt-polycondensation of a dihydric hydroxy compound and a bisaryl carbonate in the presence of an electron-donative amine compound catalyst. CONSTITUTION:The objective polycarbonate can be produced by the melt- polycondensation of (A) a dihydric hydroxy compound [e.g. the dihydric phenol of formula I to IV (R1 to R4 are H, 1-8C alkyl or phenyl; X is halogen; n is 0 4; m is 1-4) and (B) a bisaryl carbonate in the presence of (C) a catalyst selected from salts of electron-donative amine compounds (e.g. N,N-dimethyl-4- aminopyridine or diazabicyclooctane).