Process for the manufacture of free-flowing pulverulent rubber

Details Process for the manufacture of free-flowing pulverulent rubber Process for the manufacture of free-flowing pulverulent rubber

C - Chemistry, Metallurgy

08

L

400/1338, 400/20

C08L 1/08 (2006.01) C08C 2/06 (2006.01) C08J 3/16 (2006.01) C08L 9/00 (2006.01)

Patent

CA 1038094

ABSTRACT A process for the manufacture of free-flowing pulver?lent rubber which can be manufactured by emulsifying rubber solutions in water contain- ing emulsifiers and by precipitating the rubbers from the emulsions and dry- ing them, if use is made of a solution of rubbers containing crystalline or thermoplastic components which are arranged in the form of a block. These rubber solutions are emulsified in water in the presence of emulsifiers. The emulsions are introduced continuously into hot water, optionally contain- ing a precipitant. The rubber solvent is at the same time continuously dis- tilled off and the rubber thereby produced in a finely divided form is separ- ated from water and dried within a certain temperature range. Unlike known processes, the process of this invention can be extended to the manufacture of filler free mixtures.

202863

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