Addition of additives to polymeric materials

Details Addition of additives to polymeric materials Addition of additives to polymeric materials

1993-12-10

2000-11-21

Niland, Patrick D.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

8903, 8904, 8905, 8906, 8907, 26421122, 26421123, 523343, 523333, 523351, D01F 102, B29C 4760, C08K 320, C08L 7700

Patent

active

061498505

ABSTRACT:
A process for introducing additives into a polymer melt comprising dispersing at least one additive in an at least partially volatile liquid vehicle with a dispersant and a stabilizer for the dispersion; feeding the resulting dispersion to a vented extruder which is extruding a polymer; and removing the fed volatiles through the extruder vent to achieve a substantially homogeneous system containing the polymer and at least one additive is disclosed.

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Bennett, D., "Requirements for Dispersions in Fiber Processing", IFJ, 1989, pp. 12, 14, 16, 19, 20, 22, 23 and 24.
Additional Foreign Patent: GB 1202636 filed Nov. 7, 1968 (copy enclosed).

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