Extrusion of vinylidene chloride copolymers under inert atmosphe

Details Extrusion of vinylidene chloride copolymers under inert atmosphe Extrusion of vinylidene chloride copolymers under inert atmosphe

1990-03-14

1991-09-03

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264564, 264169, 264173, 264211, 425 73, 4253261, B29C 4778

Patent

active

050452592

ABSTRACT:
The present invention is a process for forming an extruded article containing a copolymer of vinylidene chloride and at least one other ethylenically-unsaturated comonomer, said process comprising the step of extruding the copolymer in the presence of (1) at least one gas which is inert with respect to the copolymer and does not plasticize the copolymer; and (2) essentially no gases which are not inert with respect to the copolymer. Vinylidene chloride copolymers extruded according to the process of the present invention have lower metal adhesion and less tendency to contain specks of carbon than do vinylidene chloride copolymer copolymers extruded under an air atmosphere.

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