C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 409/34 (2006.01) C07C 407/00 (2006.01) C08F 4/34 (2006.01) C08F 12/04 (2006.01) C08F 14/06 (2006.01)
Patent
CA 2389728
A process for producing peroxydicarbonates comprising first reacting at least one inorganic peroxide with at least one alkali metal hydroxide to form at least one alkali metal peroxide. The at lest one alkali metal peroxide is added to a mixture of at least one haloformate, at least one dispersant and water. The mixture is homogenize during the entire reaction to form a peroxydicarbonate. The peroxydicarbonate is dispersed as small droplets of from 1 to 10 microns in size in the aqueous mixture. The entire mixture is added to a polymerization reactor containing an ethylenically unsaturated monomer. The peroxydicarbonate functions as the free radical initiator to polymerize the monomer. The peroxydicarbonate is substantially free of organic solvents and plasticizers. The resulting polymers are of high quality.
L'invention concerne un procédé de production de peroxydicarbonates consistant à faire réagir dans un premier temps au moins un peroxyde inorganique avec au moins un hydroxyde métallique d'alcali pour former au moins un peroxyde métallique d'alcali. Ce dernier est ajouté à un mélange contenant au moins un haloformate, au moins un dispersant et de l'eau. Le mélange est homogénéisé pendant toute la réaction pour former un peroxydicarbonate. Celui-ci est dispersé comme de petites gouttelettes d'une taille comprise entre 1 et 10 microns dans le mélange aqueux. L'ensemble du mélange est ajouté à un réacteur de polymérisation renferment un monomère non saturé à l'éthylène. Le peroxydicarbonate agit comme l'initiateur radicalaire libre pour polymériser le monomère. Le peroxydicarbonate est pratiquement exempt de solvants organiques et de plastifiants. Les polymères résultants sont de haute qualité.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Oxy Vinyls Lp
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