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公开(公告)号：JPH05125167A
公开(公告)日：1993-05-21
申请号：JP28838791
申请日：1991-11-05
Applicant: DAICEL CHEM
Inventor： SUGANO TATSUYA , OSHINO YASUHIRO
Abstract: PURPOSE:To obtain a high-molecular weight polycarbonate, excellent in transparency and suitable for injection molding, etc., without using toxic phosgene by polycondensing a dihydric phenol with a carbonic acid diester in the presence of a specific catalyst. CONSTITUTION:A dihydric phenol such as 2,2-bis-(4-hydroxyphenyl)propane is polycondensed with a carbonic acid diester in the presence of a catalyst selected from a benzylcarbanion-forming compound expressed by the formula [R1 is H, 1-5C alkoxyl or nitro; R2 and R3 are H, 1-5C alkyl or phenyl; M is zinc, tin, lead, antimony or bismuth; (l) is 2-4] (e.g. zinc diphenylacetate) to afford the objective polycarbonate. Furthermore, the compound expressed by the formula is used in an amount of preferably 10 to 10 mol based on the dihydric phenol and the content of hydroxyl group terminals is preferably
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公开(公告)号：JPH04106126A
公开(公告)日：1992-04-08
申请号：JP22323790
申请日：1990-08-24
Applicant: DAICEL CHEM
Inventor： YAMATO TSUTOMU , OSHINO YASUHIRO
Abstract: PURPOSE:To produce a polycarbonate having a high molecular weight and improved colorlessness, transparency and production efficiency by melt- polycondensing a dihydroxy compound with a bisaryl carbonate by transesterification in four specified steps. CONSTITUTION:In step 1, a monomer mixture comprising a dihydroxy compound (A) and a bisaryl carbonate (B) is polycondensed in a molten state in at least one tank-type reactor to obtain a polycarbonate prepolymer of a viscosity- average molecular weight of 5000-20000. In step 2, this prepolymer is received in at least one hold tank, step 3, it is polycondensed in a vented extruder to obtain a polycarbonate of a viscosity-average molecular weight of 10000-30000 while the distillate such as the phenol formed by the reaction is removed. In step 4, this polycarbonate is treated in at least one paddle-type self-cleaning twin-screw extruder to melt-polycondense components A and B by transesterification to thereby obtain a polycarbonate of a viscosity-average molecular weight of 10000-30000.
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公开(公告)号：JPH047328A
公开(公告)日：1992-01-10
申请号：JP11089090
申请日：1990-04-25
Applicant: DAICEL CHEM
Inventor： YAMATO TSUTOMU , OSHINO YASUHIRO
Abstract: PURPOSE:To obtain a lowly colored high-molecular weight polycarbonate by melt-polycondensing a dihydroxy compound with a bisaryl carbonate in a reactor having an inside wall made of buffed stainless steel. CONSTITUTION:The inside wall of a stainless steel reactor is buffed with a buffing compound having a grain size of 80mum or below. A dihydroxy compound of any one of formulas I-IV (wherein R1 to R5 are each H, 1-8C linear or branched alkyl or phenyl; X is halogen, (n) is 0-4; and (m) is 1-4) is melt- polycondensed with a bisaryl carbonate at 100-300 deg.C in the presence of a transesterification catalyst (e.g. lithium borohydride) in the reactor.
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公开(公告)号：JPH0995512A
公开(公告)日：1997-04-08
申请号：JP27467395
申请日：1995-09-28
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , TANAKA MASAKI
Abstract: PROBLEM TO BE SOLVED: To provide a method for recovering an epoxidized block copolymer from its organic solvent solution by a simpler and more economical process and to provide an epoxidized block copolymer which does not emit any foreign odor during molding and can give a molding not suffering from poor appearance. SOLUTION: An epoxidized block polymer obtained by epoxidizing a block copolymer composed of a block of a polymer based on a vinylaromatic hydrocarbon compound and a block of a polymer based on a conjugated diene compound or a hydrogenation product thereof in an organic solvent is recovered from its organic solution. In this operation, the above solution is fed into a vaporizer to directly vaporize and remove the organic solvent. According to this method, an epoxidized block copolymer of a content having a residual organic solvent of 5,000ppm or below can be obtained.
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公开(公告)号：JPH0967409A
公开(公告)日：1997-03-11
申请号：JP24845195
申请日：1995-09-01
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , OTSUKA YOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To efficiently and stably perform a dehydration process of an epoxidized block copolymer for a long period of time. SOLUTION: A block copolymer composed of a polymer block mainly comprising a vinyl aromatic hydrocarbon compound and a polymer block mainly comprising a conjugate diene compound or its hydrogenated material is epoxidized, and the resultant epoxidized block copolymer is made to a solution. The solution is subjected to a steam stripping to remove the solvent and the resultant clam is dehydrated by a screw extruder-type squeezing dehydrator. In the dehydration, a gap of a slit in a slit part for dehydration of the dehydrator is made within a range of 0.06-1.0mm to obtain a polymer containing
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Patent Agency Ranking
公开(公告)号：JPH0912841A
公开(公告)日：1997-01-14
申请号：JP19123095
申请日：1995-07-03
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , OTSUKA YOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain an epoxidized block copolymer compsn. excellent in thermal stability and hue. SOLUTION: This compsn. is obtd. by adding 0.005-10 pts.wt., pref. 0.1-2 pts.wt., phenolic stabilizer and/or phosphorus stabilizer to 100 pts.wt. epoxidized block copolymer which is obtd. by epoxidizing an optionally hydrogenated block copolymer comprising polymer blocks formed mainly from a vinylarom. hydrocarbon compd. and polymer blocks formed mainly from a conjugated diene compd.
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公开(公告)号：JPH08311393A
公开(公告)日：1996-11-26
申请号：JP14565795
申请日：1995-05-19
Applicant: DAICEL CHEM
Inventor： OTSUKA YOSHIHIRO , OSHINO YASUHIRO
IPC: C08G59/34 , C08J7/04 , C09D163/00 , C09D163/08
Abstract: PURPOSE: To obtain coating resin suitable as a surface coating agent for improving coating performance or printability of the surface of a film, a sheet or a molding comprising an olefinic resin and a low polar polymer as a base, or for coating the surfaces of these materials or as a binder for ink. CONSTITUTION: This coating resin composition comprises (A) a coating resin composed of an epoxidized block copolymer, (B) an organic compound containing a functional group such as a hydroxyl group, carboxyl group or amino group to be reacted with an epoxy group, having 150-150,000 number- average molecular weight and (C) an epoxy rein opening reaction promoter and in the weight ratios of the component (A)/(A+B) of 1/100-99/100 and in the amount of 0-10 pts.wt. of the component C based on 100 pts.wt. of the components (A+B).
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公开(公告)号：JPH08259849A
公开(公告)日：1996-10-08
申请号：JP9154595
申请日：1995-03-24
Applicant: DAICEL CHEM
Inventor： OTSUKA YOSHIHIRO , AIZAWA KATSUMI , OSHINO YASUHIRO
IPC: C08L63/00 , C08G59/34 , C09D5/00 , C09D163/00 , C09J5/02
Abstract: PURPOSE: To obtain a primer composition to be used in bonding, coating, laminating and combining a slightly bondable plastic material and an inorganic material such as glass, ceramic, concrete, metal, etc., as an object. CONSTITUTION: This primer composition is obtained by blending (a) an acid modified styrene block resin having 3,000-100,000 Mw with (b) an epoxy-modified styrene block resin having 3,000-100,000 Mw and 0.5-7wt.% oxirane oxygen concentration in one molecule in the blending ratio of the carboxyl group of the component (a) and the epoxy group of the component (b) of 1:0.5 to 0.5:1 as the mol equivalent blending ratio and making the blend into a liquid state at a normal temperature with a good solvent for the components (a) and (b). The primer composition is previously applied to the surface of a slightly bondable plastic material or the surface of a metal in 1-50 micron film thickness as dried film thickness, dried, cured and aged and the plastic material or the metal is sent to a process such as bonding, coating, laminating or combining through the cured coating film of the primer.
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公开(公告)号：JPH08165342A
公开(公告)日：1996-06-25
申请号：JP31038194
申请日：1994-12-14
Applicant: DAICEL CHEM
Inventor： SUGANO TATSUYA , OSHINO YASUHIRO
Abstract: PURPOSE: To obtain a method for cleaning and drying a resin production apparatus whereby a resin attached to the apparatus is cleaned by using a solvent capable of decomposing and dissolving the resin without using a halogenous solvent strictly regulated by waste water regulations. CONSTITUTION: In a resin production apparatus comprising a reaction vessel for the former condensation step and a vented horizontal or vertical twin-screw reactor for the latter condensation step, only the reaction vessel for the former step is cleaned with at least one solvent selected from among phenol, benzyl alcohol, pyridine, dimethylformamide, ethyl acetate, and tetrahydrofuran and dried in the substantial absence of oxygen.
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公开(公告)号：JPH08120022A
公开(公告)日：1996-05-14
申请号：JP28132194
申请日：1994-10-20
Applicant: DAICEL CHEM
Inventor： OSHINO YASUHIRO , OTSUKA YOSHIHIRO
IPC: C08F8/08 , C08F297/04
Abstract: PURPOSE: To produce an epoxydized block copolymer having a low water con tent stably without loss of epoxy groups by epoxidizing a specified block copoly mer under specified conditions and subjecting the epoxidized copolymer to a specified treatment. CONSTITUTION: A (hydrogenated) block copolymer composed of a polymer block (A) based on a vinylaromatic hydrocarbon compound and a polymer block (B) based on a conjugated diene compound is mixed with an organic solvent to form a solvent slurry or solution of the copolymer, and the C-C unsaturations present in block (B) are epoxidized with an epoxidizing agent (e.g. peracetic acid). The reaction solution is subjected to neutralization and/or water washing to lower the acid value of the solution to 5mgKOH/g or below and the formed solution of a polymer concentration of 5-50wt.% is stripped at a temperature of the boiling point of the solvent or the azeotropic point of its azeotrope with water to 120 deg.C in the presence of a surfactant. The obtained crumbs of the epoxydized copolymer are dehydrated to a water content of 1-30wt.% and further dried to obtain the target copolymer having a water content of 1wt.% or below and an epoxy equivalent of 140-2700.
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