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公开(公告)号：JPH041227A
公开(公告)日：1992-01-06
申请号：JP10359690
申请日：1990-04-19
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , SUGANO TATSUYA
Abstract: PURPOSE:To obtain a polycarbonate excellent in heat resistance, hydrolysis resistance and hue by mixing a polycarbonate obtained under specified conditions with a phosphite compound. CONSTITUTION:A polycarbonate obtained by transesterifying a dihydroxy compound [e.g. 2,2-bis(4-hydroxyphenyl)propane] with a bisaryl carbonate (e.g. diphenyl carbonate) in the presence of a transesterification catalyst (e.g. potassium borohydride) and melt-polycondensing the product is mixed with a phosphite compound, desirably a compound of the formula.
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公开(公告)号：JPH03174442A
公开(公告)日：1991-07-29
申请号：JP31461989
申请日：1989-12-04
Applicant: DAICEL CHEM
Inventor： SUGANO TATSUYA , OSHINO YASUHIRO
Abstract: PURPOSE:To prepare a high-mol.wt. polycarbonate substantially free from chlorine ion without using toxic phosgene by the melt polycondensation of a dihydroxy compd. with a bisaryl carbonate in the presence of a catalyst comprising a borane complex. CONSTITUTION:The melt polycondensation of a dihydroxy compd. with a bisaryl carbonate is conducted in the presence of a catalyst comprising a borane complexe. As the dihydroxy compd., a compd. of formula I, II, III, or IV (wherein R1, R2, R3, and R4 are each H, 1-8C linear or branched alkyl, or phenyl; X is halogen: n is 0-4; and m is 1-4) is pref. Examples of the borane complexe include those of borane with ammonia, dimethylamine, trimethylamine, dimethylaniline, pyridine, morpholine, pyrrole, and tetrahydrofuran.
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公开(公告)号：JPH09169816A
公开(公告)日：1997-06-30
申请号：JP34837795
申请日：1995-12-18
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , TANAKA MASAKI
IPC: C08F8/08 , C08F297/04
Abstract: PROBLEM TO BE SOLVED: To produce an epoxidized block copolymer having a low residual organic solvent content. SOLUTION: A block copolymer composed of blocks of a polymer based on a vinylaromatic compound and blocks of a polymer based on a conjugated diene or a hydrogenated product thereof is mixed with an organic solvent to form an organic solvent solution or slurry having a polymer concentration of 5-50wt.%. The unsaturated C-C bonds present in the polymer blocks in the organic solvent solution or slurry are epoxidized with an epoxidizing agent. The obtained epoxidation solution or slurry is subjected to washing with water and/or neutralization to lower the acid value of the solution or slurry to 5mgKOH/g or below. The epoxidation reaction solution or slurry after being subjected to washing with water and/or neutralization is fed into an evaporator to obtain an epoxidized block copolymer having a residual solvent content of 5,000ppm or below and a gel fraction of 5wt.% or below.
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公开(公告)号：JPH09169815A
公开(公告)日：1997-06-30
申请号：JP34837695
申请日：1995-12-18
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , TANAKA MASAKI
Abstract: PROBLEM TO BE SOLVED: To produce an epoxidized block copolymer having excellent heat stability by an economically profitable process. SOLUTION: A block copolymer composed of blocks of a polymer based on a vinylaromatic hydrocarbon compound and blocks of a polymer based on a conjugated diene compound or a hydrogenated derivative thereof is epoxidized in an organic solvent. Next, 0.005-5 pts.wt., per 100 pts.wt. finally obtained epoxidized block copolymer, phenolic stabilizer and/or phosphorus stabilizer is added to the epoxidation reaction solution containing the epoxidized block copolymer, and the organic solvent is then removed from the epoxidation reaction solution.
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公开(公告)号：JPH08259848A
公开(公告)日：1996-10-08
申请号：JP9154495
申请日：1995-03-24
Applicant: DAICEL CHEM
Inventor： OTSUKA YOSHIHIRO , AIZAWA KATSUMI , OSHINO YASUHIRO
IPC: C08F297/04 , C08G59/34 , C09D5/00 , C09D163/00 , C09D163/08
Abstract: PURPOSE: To obtain a primer composition containing a prescribed epoxy modified block copolymer, providing a resin molding of a polyolefin, etc., with a primer layer having excellent adhesiveness without pretreatment with a chlorine- based solvent. CONSTITUTION: This composition is obtained by blending (A) 100 pts.wt. of an epoxy modified block copolymer prepared by epoxidizing a conjugated diene- derived double bond of a block copolymer comprising a block composed of an aromatic vinyl compound (preferably styrene) structural unit and a block composed of a conjugated diene block (preferably butadiene and/or isoprene) structural unit with (B) 50-10,000 pts.wt., preferably 200-2,000 pts.wt. of an organic solvent (preferably toluene). To be concrete, a partially hydrogenated styrene-isoprene block copolymer is preferably used as the block copolymer of the component A. The degree of the epoxidation of the component A is preferably 1-5wt.% of oxirane oxygen concentration.
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Patent Agency Ranking
公开(公告)号：JPH08259747A
公开(公告)日：1996-10-08
申请号：JP9154395
申请日：1995-03-24
Applicant: DAICEL CHEM
Inventor： OTSUKA YOSHIHIRO , AIZAWA KATSUMI , OSHINO YASUHIRO
IPC: C08L23/04 , C08L63/00 , C08L63/08 , C08L101/00
Abstract: PURPOSE: To obtain a reclaimed thermoplastic resin composition excellent in flowability, strength properties, moldability, etc., by using a scrap of a structure constituted by laminating thermoplastic resins. CONSTITUTION: The reclaimed thermoplastic resin composition comprises 20-67wt.% flexible polyethylene resin, 30-77wt.% scrap of a structure prepared by laminating at least two thermoplastic resins being a combinations of materials selected from among a polyamide resin, a polyester resin, a polypropylene resin, a polyethylene resin, etc., and 3-20wt.% epoxidized (partially hydrogenated) diene polymer.
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公开(公告)号：JPH07258420A
公开(公告)日：1995-10-09
申请号：JP10109894
申请日：1994-05-16
Applicant: DAICEL CHEM
Inventor： SUGANO TATSUYA , OSHINO YASUHIRO
Abstract: PURPOSE:To provide a cleansing solvent comprising one or more kinds of solvents selected from a specific solvent group excluding halogenated solvents, having no problem on the regulating of waste water, and useful for cleansing resin production devices. CONSTITUTION:A cleansing solvent for resin production devices comprises one or more kinds of solvents selected from among phenol, benzyl alcohol, pyridine, dimethylformaldehyde, ethyl acetate and tetrahydrofuran. Metal materials (e.g. hastelloy or nickel 200) having iron contents of
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公开(公告)号：JPH06345860A
公开(公告)日：1994-12-20
申请号：JP26342193
申请日：1993-10-21
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , SUGANO TATSUYA
Abstract: PURPOSE:To produce a straight-chain polycarbonate having high molecular weight and excellent heat-resistance, hydrolysis resistance, hue and impact resistance using a production facility available at a low cost compared with conventional facility. CONSTITUTION:This polycarbonate is produced by the melt polycondensation of a bivalent hydroxy compound with a carbonic acid diester in the presence of an ester interchange catalyst. In this process, the Fe content of the material contacting with the reaction mixture is 20wt.% in the 2nd polycondensation reaction process and thereafter.
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公开(公告)号：JPH0616803A
公开(公告)日：1994-01-25
申请号：JP12568091
申请日：1991-03-07
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , SUGANO TATSUYA
Abstract: PURPOSE:To obtain a high-molecular weight polycarbonate substantially free from chloride ion without using phosgene, which is toxic, by polycondensing a dihydric phenol with a carbonic diester in the presence of a compound generating a benzylcarbanion. CONSTITUTION:A dihydric phenol is polycondensed with a carbonic diester in the presence of a catalyst selected from among compounds generating a benzylcarbanion, represented by formula I (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 metal or an alkaline earth metal). Examples of the phenol include ones represented by formulae II, III, IV, and V (wherein R1, R2, R3, and R4 each is H, a 1-8C linear or branched alkyl, or phenyl; X is a halogen; n is 0-4; and m is 1-4).
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公开(公告)号：JPH05125172A
公开(公告)日：1993-05-21
申请号：JP29017891
申请日：1991-11-06
Applicant: DAICEL CHEM
Inventor： YAMATO TSUTOMU , OSHINO YASUHIRO
Abstract: PURPOSE:To efficiently obtain a polycarbonate having high molecular weight, free from coloration, having excellent transparency and suitable for injection molding, etc., by polycondensing a dihydric hydroxy compound with a bisaryl carbonate in the presence of a catalyst in a reactor consisting of a specific material. CONSTITUTION:A dihydric hydroxy compound such as 2,2-bis-(4-hydroxyphenyl) propane is polycondensed with a bisaryl carbonate such as diphenyl carbonate in the presence of a transesterification catalyst consisting of an electron donative amine compound such as N,N-dimethyl-4-aminopyridine or the electron donative amine compound and alkali (earth) metal compound in a reactor using a material whose Cr and/or Ni content is >=60% in quantitative relationship of the composition constituted as the material to provide the objective polycarbonate.
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