Production of low-filler rubber powders by the grinding process

Details Production of low-filler rubber powders by the grinding process Production of low-filler rubber powders by the grinding process

1977-10-21

1979-06-12

Goldberg, Howard N.

Solid material comminution or disintegration

Processes

Application of solids to material

B02C 2306

Patent

active

041577906

ABSTRACT:
A process for the production of rubber powder having a particle size of from about 200 to 1500 .mu. and a powdering agent content of less than 7% by weight by grinding rubber particles, wherein the rubber is initially mechanically size-reduced into surface-rich and pore-rich particles, the entire quantity of powdering agent is added to the rubber particles, which are then ground at low temperature to prevent the rubber from flowing, non-adsorbed or freshly added powdering agent is adsorbed by the rubber powder in a zone following the grinding machine, and the rubber powder obtained is cooled to such an extent that no warm flow of the rubber occurs.

REFERENCES:
patent: 2853742 (1958-09-01), Dasher
patent: 2895939 (1959-07-01), Stober et al.
patent: 3190565 (1965-06-01), Jayne, Jr.
patent: 3580519 (1971-05-01), Klein et al.
patent: 3648937 (1972-03-01), Ehrreich

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