Title:
PROCESS FOR PREPARING UNSATURATED QUATERNARY AMMONIUM SALTS
Document Type and Number:
WIPO Patent Application WO/1988/006152
Kind Code:
A1
Abstract:
A process for preparing unsaturated quaternary ammonium salts, which comprises treating a cationic vinyl monomer represented by general formula (1) with an alkyl or aralkyl halide to prepare an unsaturated quaternary ammonium salt represented by general formula (2) using a reaction solvent comprising a mixture of water with an aprotic organic solvent in a specific mixing ratio and controlling a dissolved oxygen concentration in the system at a level of less than 1.8 ppm but not less than 0.3 ppm. In formula (1), R1 represents a hydrogen atom or a methyl group, R2 and R3 each independently represents a C1-4 alkyl group, A represents an oxygen atom or NH, and B represents a C1-4 alkylene group. In formula (2), R1, R2, R3, A, and B are as defined above, R4 represents a C1-4 alkyl group or a benzyl group, and X- represents a halide anion. In this process, the ammonium salt is not precipitated even when formed as the reaction proceeds, which permits smooth stirring of the system and heat removal therefrom and which prevents formation of substances causative of polymerization and gelation and inhibiting polymerization due to overheating. This process enables an excellent aqueous solution of the unsaturated quaternary ammonium salt to be industrially produced with ease. The salt can be used as a starting material for producing a high-molecular cationic polymer.
Inventors:
NAGATSU YOSHIROU (JP)
NAGAMOTO AKIYOSHI (JP)
HARADA KAZUYA (JP)
MUKOUYAMA HIDEAKI (JP)
NAGAMOTO AKIYOSHI (JP)
HARADA KAZUYA (JP)
MUKOUYAMA HIDEAKI (JP)
Application Number:
PCT/JP1988/000165
Publication Date:
August 25, 1988
Filing Date:
February 18, 1988
Export Citation:
Assignee:
KOHJIN CO (JP)
International Classes:
C07C219/08; C07C67/00; C07C211/62; C07C213/00; C07C213/02; C07C231/00; C07C231/12; C07C233/38; C07C233/89; (IPC1-7): C07C93/193; C07C89/00; C07C102/00; C07C103/70
Foreign References:
| JPS51127016A | 1976-11-05 | |||
| JPS59110660A | 1984-06-26 | |||
| JPH0654343A | 1994-02-25 |
Other References:
See also references of EP 0302122A1
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