Title:
(METH)ACRYLIC ACID POLYMERIZATION INHIBITOR COMPOSITION AND (METH)ACRYLIC ACID POLYMERIZATION INHIBITION USING THE SAME
Document Type and Number:
Japanese Patent JP3312638
Kind Code:
B2
Abstract:
PURPOSE: To obtain a composition for inhibiting the polymerization of (meth) acrylic acid in its purification process to remove aldehydes through distillation in the presence of an aldehyde treating agent, comprising a p-phenylenediamine compound, phenolic compound and phenothiazine.
CONSTITUTION: This composition comprises (A) a p-phenylenediamine compound of the formula (R1 and R2 are each a 1-8C alkyl, phenyl or a l--4C alkyl- substituted phenyl) (pref. N,N'-diphenyl-p-phenylenediamine or N,N'-di-o-tolyl-p- phenylenediamine), (B) a phenolic compound (pref. hydroquinone, methoquinone, cresol or t-butylcatechol), and (C) phenothiazine, with the weight ratio A/B/C of pref. 1:(0.3-3):(0.3-3).
Inventors:
Kazuhiko Sakamoto
Masahiro Uemura
Takahiro Takeda
Masatoshi Ueoka
Masahiro Uemura
Takahiro Takeda
Masatoshi Ueoka
Application Number:
JP13542994A
Publication Date:
August 12, 2002
Filing Date:
June 17, 1994
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C07C57/075; C07C51/50; (IPC1-7): C07C51/50; C07C57/075
Domestic Patent References:
| JP5194614A | ||||
| JP1230543A | ||||
| JP50101313A | ||||
| JP60252446A | ||||
| JP5993027A | ||||
| JP5910546A | ||||
| JP4930312A | ||||
| JP5033042B1 |