公开(公告)号：JP2000319401A

公开(公告)日：2000-11-21

申请号：JP13056899

申请日：1999-05-11

Applicant: DAICEL CHEM

Inventor： KAJIKAWA YASUTERU

IPC: C08J3/00 ,  C08G63/08 ,  C08G63/66 ,  C08G63/91 ,  C08L1/08 ,  C08L101/16

Abstract: PROBLEM TO BE SOLVED: To perfectly remove discoloration without influencing characteristics other than a hue at all by treating with a peroxide a discolored grafted cellulose derivative obtained by ring-opening graft polymerization of a cyclic ester to a cellulose derivative having a hydroxyl group. SOLUTION: Preferably, a cellulose derivative having a hydroxyl group is cellulose acetate, cellulose acetate butyrate or the like and a cyclic ester is ε-caprolactone. A peroxide is suitably an inorganic peroxide selected among hydrogen peroxide, zinc peroxide, calcium peroxide, strontium peroxide, sodium peroxide, lead peroxide and the like, or an organic peroxide selected among peracetic acid, di-tert.-butyl peroxide, bis(α,α-dimethylbenzyl)peroxide and the like. The treatment temperature is 0-250 deg.C, preferably around ordinary temperature. The contact time is 1 min to 48 hr, preferably 1-12 hr.

公开(公告)号：JP2000001607A

公开(公告)日：2000-01-07

申请号：JP18159898

申请日：1998-06-12

Applicant: DAICEL CHEM

Inventor： NAKADA KOJI ,  KAJIKAWA YASUTERU

IPC: C08K3/34 ,  C08L67/04 ,  C08L69/00 ,  C08L101/16

Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition having mechanical properties same as these of general purpose plastics, and high biodegradability by compounding a polycaprolactone with an aliphatic polyester-carbonate. SOLUTION: The objective composition is obtained by compounding (B) 1-200 pts.wt. polycaprolactone with (A) 100 pts.wt. aliphatic polyester-carbonate. The component A is preferably obtained by copolymerizing a dicarboxylic acid component comprising succinic acid and/or adipic acid, with a diol component of 1,4-butanediol, and an organic carbonate compound. The ratio of the copolymerized organic carbonate compound is preferably 0.5-50 mol.% based on the total of the succinic acid and/or the adipic acid, and the organic carbonate compound. An inorganic additive (preferably talc) in the amount of 5-80 pts.wt. is preferably further compounded therewith.

公开(公告)号：JPH06107590A

公开(公告)日：1994-04-19

申请号：JP25965992

申请日：1992-09-29

Applicant: DAICEL CHEM

Inventor： KOMORITANI MASAHIRO ,  KAJIKAWA YASUTERU

IPC: B01J31/22 ,  C07B61/00 ,  C07C51/10 ,  C07C51/54 ,  C07C51/56 ,  C07C53/12

Abstract: PURPOSE:To markedly increase a reaction rate in the presence of a small amount of an auxiliary catalyst by employing a beryllium compound as the cocatalyst, when methyl acetate is reacted with CO in the presence of a rhodium compound and methyl iodine as main catalysts. CONSTITUTION:Methyl acetate or dimethyl ether is reacted with carbon monoxide in the presence of a rhodium compound (e.g. rhodium iodide) and methyl iodine as main catalysts and further in the presence of a beryllium compound (e.g. beryllium hydroxide) as a cocadtalyst preferably in a ratio of 0.5-50 moles per mole of the rhodium compound to produce acetic anhydride. The reaction is preferably continuously performed in acetic anhydride and/or acetic acid as reaction solvents at a reaction temperature of 150-250 deg.C under a pressure of 20-150atm.

公开(公告)号：JP2001209923A

公开(公告)日：2001-08-03

申请号：JP2000016278

申请日：2000-01-25

Applicant: DAICEL CHEM

Inventor： KAJIKAWA YASUTERU

IPC: G11B5/702 ,  C08L1/08 ,  G11B5/842

Abstract: PROBLEM TO BE SOLVED: To obtain a binder excellent in the dispersibility of a magnetic powder and to provide a magnetic recording medium capable of ensuring good magnetic characteristics, electromagnetic transducing characteristics and durability. SOLUTION: In the magnetic recording medium obtained by forming a magnetic layer consisting essentially of a magnetic powder and a binder on a nonmagnetic substrate, the binder is a cyclic ester modified cellulose derivative.

公开(公告)号：JP2001121824A

公开(公告)日：2001-05-08

申请号：JP30585199

申请日：1999-10-27

Applicant: DAICEL CHEM

Inventor： KAJIKAWA YASUTERU

IPC: B41J31/00 ,  B41M5/30 ,  B41M5/382 ,  B41M5/395 ,  B41M5/40 ,  B41M5/41 ,  B41M5/42

Abstract: PROBLEM TO BE SOLVED: To provide a thermal transfer sheet excellent in multi-printing performance. SOLUTION: In a multi-printing thermal transfer sheet in which a heat melting ink layer and a porous layer are formed in turn on one side of a base material, the porous layer has porous structure comprising a cyclic ester- modified cellulose derivative, and at least a surface layer contacting the ink layer of the porous layer contains at least part of a heat melting ink constituting the ink layer.

公开(公告)号：JP2001105745A

公开(公告)日：2001-04-17

申请号：JP28671699

申请日：1999-10-07

Applicant: DAICEL CHEM

Inventor： KAJIKAWA YASUTERU

IPC: B41M5/382 ,  B41M5/50 ,  B41M5/52 ,  B41M5/38

Abstract: PROBLEM TO BE SOLVED: To provide an image-receiving body for a heat-sensitive transfer recording, wherein the separation property to a heat-transfer sheet containing a sublimation dye is excellent, the coloring density is high, and a recorded image which is excellent in clearness can be formed, and its manufacturing method. SOLUTION: For this image-receiving body for a heat-sensitive transfer recording, a dye-accepting layer comprises a cyclic ester modified cellulose derivative which is obtained by ring-opening-polymerizing a cyclic ester with a hydroxyl group-containing cellulose derivative. In this case, the dye-accepting layer is formed by applying the cyclic ester modified cellulose derivative solution which is obtained by ring-opening-polymerizing the cyclic ester with the hydroxyl group-containing cellulose derivative, at least on one surface of a base material, in this manufacturing method of the image-accepting body for the heat-sensitive transfer recording.

公开(公告)号：JPH11166044A

公开(公告)日：1999-06-22

申请号：JP34856497

申请日：1997-12-03

Applicant: AGENCY IND SCIENCE TECHN ,  RES INST INNOVATIVE TECH EARTH ,  DAICEL CHEM ,  TOPPAN PRINTING CO LTD

Inventor： MASUDA TAKASHI ,  ASAI MICHIHIKO ,  IKEDA YOSHIKAZU ,  IMADA YASUKI ,  KAJIKAWA YASUTERU ,  TANIGUCHI MASAYUKI ,  MATSUDA AKIO

IPC: C08G63/16 ,  C08G63/60 ,  C08G63/66 ,  C08G63/672 ,  C08L101/16

Abstract: PROBLEM TO BE SOLVED: To obtain the subject polyesterether having a novel structure and a practically sufficiently high melting temperature and excellent in a mechanical strength and workability, in an industrially advantageous manner by making the polyesterether include specific 3 kinds of ester parts. SOLUTION: This polyesterether is obtained by including (A) an ester part of formula I (R is an 1-12C bivalent aliphatic; R is a 2-12C bivalent aliphatic; (t) is 0 or 1; and (p) is the molar ratio of an ester part of formula I in the polyester ether), (B) an ether group-containing ester part of formula II (R is H or an acyl; (n) is a mean degree of polymerization, i.e., >=1; and (q) is a molar ratio of the ester part of formula II, i.e., 0.0005 to 0.005), and (C) an ester part of formula III (R is an 1-12C bivalent aliphatic; and (f) is a molar ratio of an ester part of formula III in the polyester ether, i.e., 0.02 to 0.3).

公开(公告)号：JPH0725813A

公开(公告)日：1995-01-27

申请号：JP16920493

申请日：1993-07-08

Applicant: DAICEL CHEM

Inventor： SHIMIZU MASAHIKO ,  AKITA KAZUYUKI ,  KAJIKAWA YASUTERU

IPC: B01J31/16 ,  C07B61/00 ,  C07C51/12 ,  C07C51/44 ,  C07C51/487 ,  C07C53/08

Abstract: PURPOSE:To provide a method for economically and efficiently producing highly pure acetic acid having a sufficient quality, namely the acetic acid excellent in a permanganate time. CONSTITUTION:A method for producing acetic acid by continuously reacting methanol and/or a methyl acetate aqueous solution with carbon monoxide in the presence of a rhodium complex as a catalyst and methyl iodide as a cocatalyst is characterized in that the concentration of unsaturated compounds in the obtained crude acetic acid is

公开(公告)号：JP2001089698A

公开(公告)日：2001-04-03

申请号：JP27138499

申请日：1999-09-24

Applicant: DAICEL CHEM

Inventor： SHIMIZU KUNIO ,  KAJIKAWA YASUTERU

IPC: B05D1/36 ,  B05D5/06 ,  B05D7/24 ,  C09D5/00 ,  C09D5/29 ,  C09D5/38 ,  C09D101/10 ,  C09D151/02

Abstract: PROBLEM TO BE SOLVED: To provide a coating composition, a metallic base coating and a coating method capable of doing 2 coats/1 bake coating-finishing which give good appearance (metallic feeling, smoothness, glass and the like), being excellent in quality (chemical resistance, adhesion between layers, water resistance, weather resistance and the like) and usable for metallic coating and nonmetallic coating. SOLUTION: After coating the surface of a substrate with a metallic base coating prepared by compounding a metallic pigment into a coating composition comprising a organic solvent (S) and a cellulose ester-modified vinylic copolymer (I), as a vehicle component, which is obtained by copolymerizing 5-40 wt.% of a cellulose ester derivative (a) obtained by ring-opening graft polymerization of cyclic esters on a cellulose ester having hydroxy groups with 95-60 wt.% of a vinyl monomer compound (b) (total of (a) and (b) is 100%), a transparent topcoat of a thermoplastic resin is applied in an uncured state followed by baking the coating film.

公开(公告)号：JP2001064565A

公开(公告)日：2001-03-13

申请号：JP23843999

申请日：1999-08-25

Applicant: DAICEL CHEM

Inventor： SHIMIZU KUNIO ,  KAJIKAWA YASUTERU

IPC: C09D101/00 ,  C09D5/24

Abstract: PROBLEM TO BE SOLVED: To provide an electroconductive coating composition excellent in storage stability and capable of forming a coating film excellent in adhesion properties to a coated product and a finish coat as well as in electroconductivity. SOLUTION: The objective composition comprises 75-85 pts.wt. of a resin containing 2-20 wt.% of a cellulose ester derivation obtained by ring-opening graft polymerization of a cyclic ester to a cellulose ester bearing a hydroxyl group and 15-25 pts.wt. of an electroconductive pigment comprising a mixture of 40-60 wt.% of an electroconductive carbon black with 60-40 wt.% of a scaly graphite.