Basf Aktiengesellschaft

Badische Anilin- & Soda-fabrik Aktiengesellschaft

Klaus Steigerwald

Oskar Buechner

Friedrich Urban

Franz G Mietzner

Gottfried Schlichthaerle

Karl-Heinz Fauth

Heinz Gehrig

A process for the manufacture of ethylene polymers by homopolymerization and copolymerization of ethylene at pressures of from 500 to 5,000 bars and at from 50.degree. to 450.degree. C, with subsequent isolation of the polymers in high pressure product isolation zones and low pressure product isolation zones. The various parallel product isolation zones are at different temperatures, and the mean product residence times in the zones may be identical or different. Very different products, in amounts which can be chosen according to requirements, and with mutually independent polymer properties, can be obtained using only one high pressure polymerization system.

Multi-stage isolation of high pressure polyethylene

Production of a homogeneous mixture of plastics materials in powder form by subjecting a molten inhomogeneous mixture of two or more plastics to a maximum shear velocity of from 10.sup.4 to 10.sup.8 sec.sup.-.sup.1 for from 10.sup..sup.-2 to 10.sup..sup.-6 seconds; the pulverulent mixtures obtained are used in rotary sintering and injection molding.

Production of mixtures of plastics materials

Growing community of inventors

Ludwigshafen, Germany

Klaus Steigerwald