Title:
PREVENTION OF POLYMERIZATION OF (METH)ACRYLIC ACID AND ITS ESTER
Document Type and Number:
Japanese Patent JP2725638
Kind Code:
B2
Abstract:
PURPOSE: To prevent the polymerization of (meth)acrylic acid or its ester by using a combination of an N-oxyl compound, manganese chloride, copper chloride, tetramethylpiperidine compound and a nitroso compound to develop marked effect of polymerization prevention.
CONSTITUTION: This polymerization inhibitor preferably comprises (A) at least one of N-oxyl compounds selected from 2,2,6,6-tetramethyl-piperidinooxyl, 4- hydroxy-2,2,6,6-tetramethylpiperidinooxyl and 4,4',4"-tris-(2,2,6,6-tetramethyl- piperidinooxyl) phosphite and (B) at least one selected from manganese chloride, copper chloride, 2,2,6,6-tetramethylpiperidine and a nitroso compound in combination, to inhibit the polymerization of (C) (meth)acrylic acid or its esters. The amount of this polymerization inhibitor is preferably 3-650ppm based on the amount of vaporized component (C).
Inventors:
SAKAMOTO KAZUHIKO
TAKEDA TAKAHIRO
KAMIOKA MASATOSHI
AKAZAWA YOJI
BABA MASAO
TAKEDA TAKAHIRO
KAMIOKA MASATOSHI
AKAZAWA YOJI
BABA MASAO
Application Number:
JP13542595A
Publication Date:
March 11, 1998
Filing Date:
June 01, 1995
Export Citation:
Assignee:
NIPPON SHOKUBAI KK
International Classes:
C07D211/22; C07C51/50; C07C57/075; C07C67/62; C07C69/54; C07F9/59; (IPC1-7): C07C57/075; C07C51/50; C07C67/62; C07C69/54
Attorney, Agent or Firm:
Ueki Kuichi
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