公开(公告)号：JP2002179608A

公开(公告)日：2002-06-26

申请号：JP2000380451

申请日：2000-12-14

Applicant: DAICEL CHEM

Inventor： NAKAI TORU

IPC: C07C45/29 ,  C07C45/58 ,  C07C45/59 ,  C07C47/544

Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently producing phthalaldehyde(s) from readily available raw materials. SOLUTION: This method for producing phthalaldehyde(s) comprises reacting at least one compound selected from o-xylylene glycol and o-xylylene oxide with nitric acid in the molar ratio of the latter to the former of about 0.2-20 to form the objective phthalaldehyde(s).

公开(公告)号：JPH10292003A

公开(公告)日：1998-11-04

申请号：JP5880298

申请日：1998-02-23

Applicant: DAICEL CHEM

Inventor： NAKAI TORU ,  ASADA TAKESHI

IPC: C08F2/38 ,  C08F12/00 ,  C08F12/04

Abstract: PROBLEM TO BE SOLVED: To obtain a vinyl polymer having a high molecular weight and a controlled molecular weight distribution while keeping the rate of polymerization high by adding a substituted hydroxylamine to the system of radical polymerization of a vinyl monomer. SOLUTION: The substituted hydroxylamines added are represented by formula I (wherein R1 and R2 are each H, a 1C or higher (substituted) aliphatic hydrocarbon group or an aromatic hydrocarbon group) or/and formula II (wherein R3 and R4 are each 1C or higher substituted aliphatic hydrocarbon group). In each or R1 and R2 , the aliphatic hydrocarbon group is exemplified by metal, ethyl, isopropyl or t-butyl, and the aromatic hydrocarbon group is exemplified by phenyl or benzyl. In formula II, -R3 -R4 - is a divalent (substituted) aliphatic hydrocarbon group corresponding to formula I, such as -CH2 CH2 - or -CH2 CH2 CH2 CH2 -. In the radical polymerization, the initiator is used in a ratio of the substances of formulas I and II to the initiator of 0.01/1 to 100/1 by mole.