公开(公告)号：DE69209172D1

公开(公告)日：1996-04-25

申请号：DE69209172

申请日：1992-01-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OHTA MASAHIRO ,  MATSUYAMA AKIO ,  SENOUE EIJI ,  KUWANO FUMIAKI ,  YASUI OSAMU ,  YOSHIDA YASUNORI ,  RYU AKINORI ,  KOBAYASHI TADASHI

IPC: C07D209/48 ,  C07D209/66 ,  C07D487/04 ,  C08G73/10 ,  C08G73/12 ,  C08K5/3417 ,  C08K9/04 ,  C08L79/08 ,  C09D179/08

Abstract: A polyimide resin composition for molding, which comprises a polyimide resin and an aromatic bisimide compound and has a melt flowability and an excellent processability in addition to the heat resistance inherent in polyamide; a carbon fiber-reinforced polyimide resin composition which comprises a polyimide resin and carbon fibers coated with an aromatic bisimide compound and has excellent mechanical strengths; and novel bisimide compounds represented by general formula (I), which are very useful as the aromatic bisimide compounds in the above resin compositions, wherein X represents a direct bond, C1 to C10 divalent hydrocarbyl, hexafluoroisopropylidene, carbonyl, thio or sulfonyl; Y1 to Y4 represent each independently hydrogen, lower alkyl, lower alkoxy, chlorine or bromine; and R represents a divalent group selected from the group consisting of monocyclic aromatic groups, fused polycyclic aromatic groups, and nonfused polycyclic aromatic groups wherein aromatic groups are linked together directly or through cross-linking member(s).

公开(公告)号：DE69209172T2

公开(公告)日：1996-10-17

申请号：DE69209172

申请日：1992-01-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OHTA MASAHIRO ,  MATSUYAMA AKIO ,  SENOUE EIJI ,  KUWANO FUMIAKI ,  YASUI OSAMU ,  YOSHIDA YASUNORI ,  RYU AKINORI ,  KOBAYASHI TADASHI

IPC: C07D209/48 ,  C07D209/66 ,  C07D487/04 ,  C08G73/10 ,  C08G73/12 ,  C08K5/3417 ,  C08K9/04 ,  C08L79/08 ,  C09D179/08

Abstract: A polyimide resin composition for molding, which comprises a polyimide resin and an aromatic bisimide compound and has a melt flowability and an excellent processability in addition to the heat resistance inherent in polyamide; a carbon fiber-reinforced polyimide resin composition which comprises a polyimide resin and carbon fibers coated with an aromatic bisimide compound and has excellent mechanical strengths; and novel bisimide compounds represented by general formula (I), which are very useful as the aromatic bisimide compounds in the above resin compositions, wherein X represents a direct bond, C1 to C10 divalent hydrocarbyl, hexafluoroisopropylidene, carbonyl, thio or sulfonyl; Y1 to Y4 represent each independently hydrogen, lower alkyl, lower alkoxy, chlorine or bromine; and R represents a divalent group selected from the group consisting of monocyclic aromatic groups, fused polycyclic aromatic groups, and nonfused polycyclic aromatic groups wherein aromatic groups are linked together directly or through cross-linking member(s).

公开(公告)号：JPH06192572A

公开(公告)日：1994-07-12

申请号：JP34254892

申请日：1992-12-22

Applicant: MITSUI TOATSU CHEMICALS

Inventor： YASUI OSAMU ,  OTA MASAHIRO

IPC: C08K5/3415 ,  C08L79/08

Abstract: PURPOSE:To obtain a composition, capable of remarkably improving the melt fluidity of a resin without impairing characteristics of a polyimide and excellent in molding processability by blending a polyimide resin having a specific structure with an aromatic polyimide oligomer. CONSTITUTION:The composition is obtained by blending (A) 100 pts.wt. polyimide resin composed of a unit expressed by formula I (X is 1-10C bivalent hydrocarbon, thio, etc.; Y1 to Y4 are H, lower alkyl, etc.; R is >=2C tetravalent group such as aliphatic or aromatic group) with (B) 0.5-100 pts.wt. aromatic polyimide oligomer. The component (A) is preferably obtained by reacting an ether diamine expressed by formula II such as bis[4-(3-aminophenoxy)phenyl]methane with a tetracarboxylic dianhydride expressed by formula III such as pyromellitic dianhydride and cyclodehydrating the resultant polyamic acid. An aromatic polyimide oligomer composed of a unit expressed by formula I is preferably used as the component (B).

公开(公告)号：JPH04318066A

公开(公告)日：1992-11-09

申请号：JP8648791

申请日：1991-04-18

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OTA MASAHIRO ,  MATSUYAMA AKIO ,  SEGAMI EIJI ,  KUWANO FUMIAKI ,  YASUI OSAMU ,  KOBAYASHI TADASHI

IPC: C08L69/00 ,  C08L79/08

Abstract: PURPOSE:To obtain a polyimide-based resin composition having excellent heat resistance, chemical resistance, mechanical strength and molding and processing properties. CONSTITUTION:(A) 99.9-50wt.% polyimide having a repeating unit shown by formula I (X is straight bond, 1-10C bifunctional chain hydrocarbon, hexafluorinated isopropylidene, etc.; bond position of nitrogen atom of imide ring is in meta- or para-position based on ether bond) is blended with (B) 0.1-50wt.% polycarbonate resin shown by formula II (Y is direct bond, 1-10C bifunctional hydrocarbon, etc.; R1 to R4 are H or lower alkyl).

公开(公告)号：JPH072989A

公开(公告)日：1995-01-06

申请号：JP14736493

申请日：1993-06-18

Applicant: MITSUI TOATSU CHEMICALS

Inventor： YASUI OSAMU ,  OBUCHI SEIJI ,  OTA MASAHIRO

IPC: C08G63/06 ,  C08G63/78 ,  C08L101/16

Abstract: PURPOSE:To industrially and inexpensively obtain a high-mol. weight poly(hydroxy carboxylic acid) in a short time through direct polycondensation with dehydration. CONSTITUTION:The production process comprises heating a hydroxy carboxylic acid or an oligomer thereof in an organic solvent under reflux in the presence of a catalyst to remove the formed water and low-boiling compounds from the reaction system, and then conducting polycondensation with dehydration while refluxing the solvent and simultaneously removing the formed water from the system, the solvent being an aliphatic ether.

公开(公告)号：JPH072986A

公开(公告)日：1995-01-06

申请号：JP14736193

申请日：1993-06-18

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OTA MASAHIRO ,  YASUI OSAMU ,  OBUCHI SEIJI

IPC: C08G63/06 ,  C08G63/78 ,  C08L101/16

Abstract: PURPOSE:To industrially and inexpensively obtain a high-mol. weight poly(hydroxy carboxylic acid) in a short time through direct polycondensation with dehydration. CONSTITUTION:The production process comprises heating a hydroxy carboxylic acid or an oligomer thereof in an organic solvent under reflux in the presence of a catalyst to remove the formed water and low-boiling compounds from the reaction system, and then conducting polycondensation with dehydration while refluxing the solvent and simultaneously removing the formed water from the system, the solvent being biphenyl or an analogue thereof.

公开(公告)号：JPH06200019A

公开(公告)日：1994-07-19

申请号：JP34013892

申请日：1992-12-21

Applicant: MITSUI TOATSU CHEMICALS

Inventor： YASUI OSAMU ,  OTA MASAHIRO

IPC: C08G73/10

Abstract: PURPOSE:To obtain a polyimide excellent in stability of high-temperature molding and melt and flow by reacting a specified diamine with a specified tetracarboxylic acid dianhydride in a specified ratio in the presence of a specified amount of a dicarboxylic acid anhydride and imidizing the obtained amic acid. CONSTITUTION:1mol of a diamine (A) of formula I wherein X is a direct bond, a 1-10C bivalent hydrocarbon group, hexafluorinated isopropylidene or the like; and Y1 to Y4 are each H, lower alkyl or the like is reacted with 0.5-0.9mol of a tetracarboxylic acid dianhydride (B) of formula II wherein R is a 2C or higher aliphatic group, a cycloaliphatic group, a monocyclic aromatic group or the like in the presence of 0.2-4mol of a dicarboxylic acid anhydride (C) of formula III wherein Z is a divalent group such as a monocyclic aromatic group or a condensed polycyclic aromatic group under such conditions that the equivalent ratio of the total of components B and C to component A is 1-2.9. The obtained reaction product is thermally or chemically imidized to obtain a polyimide having a basic skeleton consisting of repeating units of formula IV.

公开(公告)号：JPH04320448A

公开(公告)日：1992-11-11

申请号：JP8820491

申请日：1991-04-19

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OTA MASAHIRO ,  MATSUYAMA AKIO ,  SEGAMI EIJI ,  KUWANO FUMIAKI ,  YASUI OSAMU ,  KOBAYASHI TADASHI

IPC: C08K5/3412 ,  C07D209/48 ,  C08K5/16 ,  C08K5/3417 ,  C08L69/00

Abstract: PURPOSE:To obtain the title composition having good moldability in addition to the excellent mechanical strengths and heat resistance inherent in polycarbonate resin by mixing an aromatic polycarbonate resin with a specified aromatic bisimide compound. CONSTITUTION:100 pts.wt. aromatic polycarbonate resin [e.g. a polymer comprising repeating units of formula I (wherein X is a direct bond, a 1-10 C bivalent hydrocarbon group, carbonyl, sulfonyl or the like; Y1 to Y4 are each H, lower alkyl or the like)] is mixed with above 0.5 to below 100 pts.wt. aromatic bisimide compounds of formula II (wherein X is as defined above; N is para, ortho or meta to X; and R is a bivalent group selected from among a monocyclic aromatic group, a condensed polycyclic aromatic group and a noncondensed polycyclic aromatic group composed of aromatic groups bonded directly or through bridging members) and/or formula III (wherein X, Y1 to Y4 and R are as defined above). A resin composition having a melt viscosity lower than that of the polycarbonate and improved in moldability can be obtained.

公开(公告)号：JPH04224371A

公开(公告)日：1992-08-13

申请号：JP40469390

申请日：1990-12-21

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OTA MASAHIRO ,  MATSUYAMA AKIO ,  SEGAMI EIJI ,  KUWANO FUMIAKI ,  YASUI OSAMU ,  KOBAYASHI TADASHI

IPC: C08L79/08 ,  D01F6/74 ,  D02G3/04 ,  D02G3/20 ,  D04C1/02 ,  F16J15/20

Abstract: PURPOSE:To provide a gland packing with good heat resistance, sealing property and workability without using aromatic polyimide by braiding a blended yarn containing rock wool and polyimide fibers made of polyimide resin with a specific composition at specific ratios respectively. CONSTITUTION:A gland packing suitable for sealing the rotary shaft of a pump and a valve is braided with a blended yarn containing rock wool 80-20wt.% and polyimide fibers 20-80wt.%. The polyimide fibers are made of polyimide resin expressed by the repetition unit of the formula I, where R represents a quadrivalent group selected from an alphatic group with the carbon number 2 or above, a cyclic alphatic group, a monocyclic aromatic group, a condensation polycyclic aromatic group and a non-condensation polycyclic aromatic group with aromatic groups connected directly or via a cross linking member.

公开(公告)号：JPH072992A

公开(公告)日：1995-01-06

申请号：JP14736793

申请日：1993-06-18

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OBUCHI SEIJI ,  YASUI OSAMU ,  OTA MASAHIRO

IPC: C08G63/06 ,  C08G63/78 ,  C08L101/16

Abstract: PURPOSE:To industrially and inexpensively obtain a high-mol. weight poly(hydroxy carboxylic acid) in a short time through direct polycondensation with dehydration. CONSTITUTION:The production process comprises heating a hydroxy carboxylic acid or an oligomer thereof in an organic solvent under reflux in the presence of a catalyst to remove the formed water and low-boiling compounds from the reaction system, and then conducting polycondensation with dehydration while refluxing the solvent and simultaneously removing the formed water from the system, the solvent being a ketone.