Process for dispersing additives in thermoplastic polymers

Details Process for dispersing additives in thermoplastic polymers Process for dispersing additives in thermoplastic polymers

1978-05-19

1979-11-13

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 23H, 260 326PQ, 260 4221, C08L 9100

Patent

active

041743300

ABSTRACT:
An improved process is provided for incorporating additives into thermoplastic polymers. The desired additive(s) are dispersed in a continuous solid phase which is a mixture of a wax and 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 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: 3401169 (1968-09-01), Mills
patent: 4039507 (1977-08-01), Paige et al.
patent: 4116911 (1978-09-01), Miyahara et al.

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