Processes for dispersing inorganic additives in thermoplastic po

Details Processes for dispersing inorganic additives in thermoplastic po Processes for dispersing inorganic additives in thermoplastic po

1978-06-12

1979-10-02

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 342, 260 4246, 260 4257, C08K 501

Patent

active

041698266

ABSTRACT:
An improved process is provided for incorporating finely-divided inorganic additives such as diatomaceous earth into thermoplastic polymers. The desired additive(s) are dispersed in a normally liquid hydrocarbon to form a Bingham fluid composition. These Bingham fluid compositions, while solid at ambient temperature and pressure, will flow under an applied pressure and can be pumped to feed the additive to a molten polymer. When this mixture is passed through a mixing apparatus such as an extruder, the additive is uniformly dispersed throughout the polymer. The process is particularly well suited to incorporate such additives into a molten ethylene polymer either as, or immediately after, the molten ethylene polymer is discharged from the reaction zone in which the polymer is prepared.

REFERENCES:
patent: 3492231 (1970-01-01), McMillen
patent: 3988285 (1976-10-01), DeVrieze
patent: 4039507 (1977-08-01), Paige et al.

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