44992-01-0Relevant articles and documents
METHOD FOR PREPARING A BIOCIDAL, BACTERIOCIDAL AND/OR BACTERIOSTATIC MATERIAL
-
, (2022/03/02)
A process for preparing a biocidal, bactericidal and/or bacteriostatic material including the preparation of a polymer precursor solution that has (a) at least one monomer A having a porphyrin group and at least one radical polymerizable function, (b) at least one radical polymerizable monomer B, a photoinitiator, and (c) at least one of the monomers chosen from a monomer C having a quaternary amine and a radical polymerizable function; and/or a monomer D having copper and a radical polymerizable function. Also, the material obtainable by the process and its uses.
PROCESS FOR UNSATURATED QUATERNARY AMMONIUM SALT
-
Page/Page column 5, (2011/02/18)
An unsaturated quaternary ammonium salt is produced by a process that includes reacting methyl chloride in a first vessel with a stoichiometric excess of an unsaturated tertiary amine in the presence of water to form a reaction mixture that includes the unsaturated quaternary ammonium salt and residual unsaturated tertiary amine. The reaction mixture is transferred to a second vessel and phase separated to yield a first fraction in which the unsaturated quaternary ammonium salt is concentrated, and a second fraction in which the residual unsaturated tertiary amine is concentrated. At least a portion of the second fraction is recycled from the second vessel to the first vessel for use in the reaction with methyl chloride. The process, which is preferably operated continuously, allows the use of reduced reaction pressures compared to processes utilizing a stoichiometric excess of methyl chloride, and it also reduces or eliminates the problems associated with recycling methyl chloride and removing methyl chloride from the unsaturated quaternary ammonium salt product.
Method for making aqueous solutions of unsaturated quaternary ammonium salts
-
Page/Page column 4-5, (2008/06/13)
The invention concerns a method for making aqueous solutions of unsaturated quaternary ammonium salts of formula (I) by reacting, in the presence of water, N,N-dimethylaminoethyl acrylate with a quaternizing agent of formula (II): R—Cl, said method is characterized in that it consists in: (a) in a closed reactor containing 5 60 wt. % of N,N-dimethylaminoethyl acrylate required for the reaction and which has been pressurized with air or depleted air at 0.5 to 3 bars, carrying out the reaction by continuously introducing, at a temperature ranging between 35 to 65° C., the quaternizing agent (II), and water, and finally the remaining N,N-dimethylaminoethyl acrylate, until the desired concentration of salt (I) in the water is reached, the water being introduced only when 0–20 wt. % of the amount required for the quaternizing agent (II) reaction has been added; the introduction of the remaining N,N-dimethylaminoethyl acrylate starting only when 20–80 wt. % required for the quaternizing agent (II) reaction has been added; and the pressure at the end of the reaction capable of reaching 9 bars; then (b) in depressurizing while maintaining the oxygen content constant by simultaneous introduction of air and, after returning to atmospheric pressure, eliminating the residual quaternizing agent. In formule (I) and (II). R=methyl or benzyl.
