Process for the extrusion of compositions comprising polypropyle

Details Process for the extrusion of compositions comprising polypropyle Process for the extrusion of compositions comprising polypropyle

1987-04-06

1989-04-18

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

With prevention of equipment fouling accumulations or deposits

264171, 264185, 264211, 524425, 524436, 524456, B29B 1110, B29B 1114

Patent

active

048225479

ABSTRACT:
This invention relates to a process for extruding scrap material comprising polyvinyl alcohol, polypropylene-polyvinyl alcohol adhesive and polypropylene prepared with a high activity polymerization catalyst, the improvement comprising utilizing in the polypropylene from about 50 to about 5000 ppm of hydrotalcite.

REFERENCES:
patent: 3400087 (1968-09-01), Robb et al.
patent: 3553158 (1971-01-01), Gilfillan
patent: 3882259 (1975-05-01), Nohara et al.
patent: 4013622 (1977-03-01), DeJuneas et al.
patent: 4244914 (1981-01-01), Ranalli et al.
patent: 4412025 (1983-10-01), Corwin et al.
patent: 4522775 (1985-06-01), Briggs et al.
patent: 4629596 (1986-12-01), Coffman
patent: 4636340 (1987-01-01), Itaba et al.

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