A process to produce a hydrocarbon rubber cement utilizing a...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 6/00 (2006.01) C08C 1/02 (2006.01) C08L 21/00 (2006.01) C08L 23/00 (2006.01)

Patent

CA 2654970

Provided for herein is a process to produce an essentially homogeneous single liquid phase, hydrocarbon-rubber cement from a polymer slurry comprising a hydrocarbon-rubber, a diluent, and unreacted monomer(s), the process comprising: (a) contacting the polymer slurry with a hydrocarbon solvent; and (b) removing the diluent in amounts not sufficiently more than is necessary to produce the essentially homogeneous single liquid phase hydrocarbon-rubber cement wherein the mass fraction of monomer(s) in the hydrocarbon-rubber cement, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber cement, is less than the mass fraction of monomer(s) in the hydrocarbon-rubber slurry, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber slurry, wherein the diluent comprises a hydrofluorocarbon.

L'invention concerne un procédé pour obtenir un ciment de caoutchouc hydrocarboné à simple phase liquide et sensiblement homogène à partir d'une bouillie de polymère comprenant un caoutchouc hydrocarboné, un diluant et un ou des monomères n'ayant pas réagi, le procédé comprenant les opérations consistant à (a) mettre en contact la bouillie de polymère avec un solvant hydrocarboné ; (b) éliminer le diluant dans des quantités non suffisamment supérieures à ce qui est nécessaire pour obtenir le ciment de caoutchouc hydrocarboné à simple phase liquide sensiblement homogène, dans lequel, sur la base de la quantité totale de caoutchouc hydrocarboné présente dans le ciment de caoutchouc hydrocarboné, la fraction massique du ou des monomères dans le ciment de caoutchouc hydrocarboné est inférieure à la fraction massique du ou des monomères dans la bouillie de caoutchouc hydrocarboné, sur la base de la quantité totale de caoutchouc hydrocarboné présent dans la bouillie de caoutchouc hydrocarboné, le diluant comprenant un hydrocarbure fluoré.

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