公开(公告)号：JPH09302097A

公开(公告)日：1997-11-25

申请号：JP12138696

申请日：1996-05-16

Applicant: MITSUI TOATSU CHEMICALS

Inventor： NAKAJIMA JUN ,  KUWANO FUMIAKI ,  OKADA KAZUNARI ,  TAMAI MASAJI

IPC: C08J3/14 ,  C08G73/10

Abstract: PROBLEM TO BE SOLVED: To provide a polyimide powder by bringing a polyimide solution comprising a polyimide having structural units represented by a specific formula and a phenolic solvent into contact with a poor solvent for the polyimide and separating the crystals thus deposited. SOLUTION: A diamine, such as 4,4'-bis(3-aminophenoxy)biphenyl, and a tetracarboxylic acid anhydride, such as pyromellitic acid dianhydride and biphenyltetracarboxylic acid dianhydride, are added to a phenolic solvent, such as m-cresol, and the mixture is heated under stirring for a predetemined time. After completion of the reaction, the reaction solution is maintained at a temperature above approximately 50 deg.C and below the boiling point of a poor solvent, such as toluene, and the poor solvent is added thereto dropwise in an amount of not less than about 10 times that of the polymer powder and at a rate of addition of not more than 6 times the theoretical yield of the polymer powder per hour. The thus-deposited crystalline powder of a polyimide having structural units of formula I (wherein X is formula II; R1 to R3 are each H, a lower alkyl, phenyl, biphenyl, etc.; Y is formula III) is separated by filtration under pressure and dried in an atmosphere of nitrogen to obtain a polyimide powder.

公开(公告)号：JPH09157452A

公开(公告)日：1997-06-17

申请号：JP32277595

申请日：1995-12-12

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OKADA KAZUNARI ,  NAKAJIMA JUN ,  TAMAI MASAJI

IPC: C08K5/053 ,  C08K5/05 ,  C08K5/15 ,  C08K5/1575 ,  C08K5/34 ,  C08K5/3445 ,  C08L23/02 ,  C08L23/12 ,  C08L23/16

Abstract: PROBLEM TO BE SOLVED: To provide a polyolefin resin composition produced by adding a sorbitol-based clearing nucleation agent and a hydantoin compound to a polyolefin resin, having excellent transparency, emitting little odor and useful for food-packaging, etc. SOLUTION: This composition contains (A) 100 pts.wt. of a polyolefin resin, (B) 0.01-2 pts.wt. of a sorbitol-based clearing nucleation agent consisting of a sorbitol derivative of preferably the formula I (R and R are each H, a 1-4C saturated aliphatic alkyl, a branched alkyl or a halogen; (m) and (n) are each 1-5) and (C) 0.001-2.0 pts.wt. of a hydantoin compound of preferably the formula II (R and R are each H, an alkyl, an aryl or a cycloalkyl), e.g. hydantoin. The component B is e.g. 1.3,2.4-di-(methylbenzylidene)sorbitol and the composition may further be incorporated with an additive such as antioxidant.

公开(公告)号：JPH09104754A

公开(公告)日：1997-04-22

申请号：JP26271095

申请日：1995-10-11

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TAMAI MASAJI ,  OIKAWA HIDEAKI ,  OKADA KAZUNARI ,  NAKAJIMA JUN

IPC: C08G73/10

Abstract: PROBLEM TO BE SOLVED: To obtain a thermosetting polyimide superior in heat resistance, processibility, and mechanical characteristics to a thermoplastic polyimide by selecting a polyimide having a specific backbone and norbornene structures at the molecular ends. SOLUTION: This thermosetting polymidie has repeating structural units, represented by formula I (wherein P1 is a divalent group represented by formula II or III; S1 is at least one kind of a monovalent group represented by formula IV or V; m is an integer of 100-1; n is an integer of 0-99, provided m+n

公开(公告)号：JPH08172900A

公开(公告)日：1996-07-09

申请号：JP32774294

申请日：1994-12-28

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SATO HIROSHI ,  NAKAJIMA JUN ,  IWAMOTO SATORU ,  KAJI YUICHI ,  MORI AKIHIRO ,  ITO HIROSHI

IPC: A01G1/00 ,  C09K17/20 ,  C09K17/22

Abstract: PURPOSE: To obtain culture soil for raising seedlings, free from hindrance for raising seedlings, excellent in strength and storage stability and suitable for transplantation of crop seedling due to mechanic. CONSTITUTION: This culture soil for raising seedlings is obtained by adding 0.1-5wt.%, preferably 0.1-1.5wt.% of a water-soluble acrylamide-based polymer obtained by copolymerizing 0.5-10mol% of 2-acrylamide-2-methylpropanesulfonic aid or its salt and/or 0.5-10mol% of an unsaturated dicarboxylic acid such as itaconic acid or its salt with an acrylamide to soil.

公开(公告)号：JPH09104755A

公开(公告)日：1997-04-22

申请号：JP26402995

申请日：1995-10-12

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TAMAI MASAJI ,  OIKAWA HIDEAKI ,  OKADA KAZUNARI ,  NAKAJIMA JUN

IPC: C08G73/10

Abstract: PROBLEM TO BE SOLVED: To obtain a thermosetting polyimide superior in heat resistance, processability, and mechanical characteristics to a thermoplastic polyimide by selecting a polyimide having a specific backbone and maleimide structures at the molecular ends. SOLUTION: This thermosetting polyimide has repeating structural units represented by formula I (wherein P1 is a divalent group represented by formula II or III; S1 is at least one kind of a monovalent group represented by formula IV or V; m is an integer of 100-1; n is an integer of 0-99, provided m+n

公开(公告)号：JPH05292833A

公开(公告)日：1993-11-09

申请号：JP10484692

申请日：1992-04-23

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SATO HIROSHI ,  NAKAJIMA JUN ,  IWAMOTO SATORU ,  KAJI YUICHI ,  MORI AKIHIRO

IPC: A01G1/00

Abstract: PURPOSE:To provide the cultivation soil for raising seedlings substantially not injuring the roots of the crop seedlings on the transplantation of the seedlings with machines and permitting to form the root balls having good rooting properties. CONSTITUTION:The cultivation soil for raising the seedlings comprises a soil containing 0.1-1.5wt.% of sodium polyacrylate as a binder. The soil gives seedings having root balls sufficiently strong for the transplantation of the seedlings with a machine without inhibiting the germination of the plants and the growth of the young seedlings. The soil especially does not limit the target plants and is also excellent in the safety.

公开(公告)号：JPH04198080A

公开(公告)日：1992-07-17

申请号：JP33222590

申请日：1990-11-29

Applicant: MITSUI TOATSU CHEMICALS

Inventor： YOSHIMURA AKIRA ,  KAMEOKA KUNIO ,  NAKAJIMA JUN ,  MIZUSHIMA KIYOSHI

IPC: C05F11/00 ,  C05G5/00

Abstract: PURPOSE:To obtain an organic liquid fertilizer suitable for the growth of crops compared with conventional fertilizer by decomposing corn steep liquor with a proteinase and compounding the decomposed liquid to a fertilizer salt. CONSTITUTION:The objective organic liquid fertilizer can be produced by decomposing corn steep liquor with a proteinase and compounding the enzymatic decomposition product containing deactivated enzyme to a fertilizer salt. Liquid fertilizer resistant to the generation of microorganism such as mold and having excellent storage stability can be produced by adding >=500ppm of sodium benzoate to the above liquid fertilizer. The amount of the fertilizer salt is preferably 10-100 pts.wt. based on 10 pts.wt. of the decomposition liquid of corn steep liquor.