Title:
7-SUBSTITUTED QUINONEMETHIDE AS INHIBITOR FOR UNSATURATED MONOMER
Document Type and Number:
Japanese Patent JP3726198
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To inhibit the early polymerization of an ethylenically unsaturated monomer mixture in the production process by mixing the monomer mixture with an effective amount of a 7-arylquinonemethide compound.
SOLUTION: This mixture comprises an ethylenically unsaturated monomer or a mixture thereof (a) with another monomer (e.g. aromatic vinyl compound) and a compound (b1) (e.g. 3,5-di-t-butyl-4-oxycyclohexa-2,5-dienylideneacetonitrile) represented by formula I (wherein R1 and R2 are each a 4-18C alkyl, a 5-12C cycloalkyl or a 7-15C phenylalkyl; and R3 is CN, COOH or the like) and a quinonemethide compound (b1) (b) (e.g. 2,6-di-t-butyl-4-benzylidenecyclohexa-2,5- dienone) represented by formula II (wherein E1 and E2 are each a 4-18C alkyl, a 5-12C cycloalkyl or a 7-15C phenylalkyl; and E3 is an aryl substituted with e.g. 2-pyridyl or the like). The amount of (b) is 1-2,000ppm based on the amount of (a), the amount of (b1) is 5-95wt.% based on the amount of (b), and the amount of (b2) is 95-5wt.%.
Inventors:
Peter Nesvadova
Samuel Evans
Mash edward gande
Volker Harmuth von Ern
Roland Arthur Edwin Winter
Samuel Evans
Mash edward gande
Volker Harmuth von Ern
Roland Arthur Edwin Winter
Application Number:
JP11545596A
Publication Date:
December 14, 2005
Filing Date:
April 12, 1996
Export Citation:
Assignee:
Ciba Specialty Chemicals Holding Inc.
International Classes:
C07B63/04; C07C7/20; C07C15/46; C07C45/51; C07C49/603; C07C49/647; C07C49/683; C07C49/747; C07C49/753; C07C49/798; C07C59/80; C07C59/82; C07C67/62; C07C69/007; C07C69/145; C07C69/24; C07C69/54; C07D295/16; C07C69/738; C07C69/78; C07C205/45; C07C235/78; C07C255/31; C07C255/40; C07F9/38; C07F9/40; C08F2/38; C08F2/40; C08K5/00; C09K15/08; C09K15/24; C09K15/32; (IPC1-7): C08F2/40; C07C7/20; C07C15/46; C07C49/603; C07C49/798; C07C59/82; C07C67/62; C07C69/145; C07C69/24; C07C69/54; C07C69/738; C07C69/78; C07C235/78; C07C255/40; C07D295/16; C07F9/40; C08K5/00
Domestic Patent References:
| JP9165408A |
Foreign References:
| US4003800 |
Other References:
F.Richmond Hewgill and Rauleigh J. Webb,3,5-Di-t-butyl-4-hydroxyphenylglycine:a Potential Spin Label,Australian Journal of Chemistry,1977年11月,30/11,2565-9
Attorney, Agent or Firm:
Calyx
Toshio Nakamura
Toshio Nakamura