Process for the production of pourable, pulverulent filler mixtu

Details Process for the production of pourable, pulverulent filler mixtu Process for the production of pourable, pulverulent filler mixtu

1974-05-10

1976-03-23

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252525, 260 297T, 260 297GP, 260 297EM, 260 297N, 260 297PT, 260 336A, 260 342, 260 4255, 260 4257, 260584B, C08K 501, C08J 320

Patent

active

039459780

ABSTRACT:
A process for the manufacture of a pourable, pulverulent rubber-filler mixture containing plasticiser oil, by combining a filler containing plasticiser oil with an aqueous emulsion of a rubber solution, and precipitating and drying the mixture, wherein the plasticiser oil is adsorptively bound on the finely divided active filler in an amount of from 1 to 100 parts by weight, relative to 100 parts by weight of the filler, the premix thus obtained, which continues to be free-flowing and pulverulent, and consists of filler charged with plasticiser oil, is dispersed in water in the presence of an emulsifier, the resulting dispersion is intimately mixed with an aqueous emulsion of a synthetic rubber solution, this mixture is introduced into an aqueous precipitation bath which is at a temperature of from 40 to 95.degree.C and contains waterglass or an acid and waterglass, and from the mixture treated in this way the rubber-filler mixture, containing plasticiser oil, is precipitated with simultaneous stripping-off of the rubber solvent, and is separated from the water and dried.

REFERENCES:
patent: 2979528 (1961-04-01), Lundsted
patent: 3338729 (1967-08-01), Ruoho
patent: 3340080 (1967-09-01), Henderson
patent: 3706676 (1972-12-01), Franke et al.
patent: 3846365 (1974-11-01), Berg et al.

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