Mixed hydrocarbyloxide treated catalyst activated at different t

Details Mixed hydrocarbyloxide treated catalyst activated at different t Mixed hydrocarbyloxide treated catalyst activated at different t

1974-03-28

1976-05-25

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526104, 526154, 526159, 526349, 526350, C08F 424

Patent

active

039591786

ABSTRACT:
Ethylene homopolymers and copolymers are made in a particle form process over a mixed catalyst comprising several portions of the same or different supported chromium components and metal promoted variations thereof in which each portion is activated at a different temperature, thereafter combined, and the composite, or each activated portion before being combined, is post treated with a hydrocarbyl aluminum hydrocarbyloxide. Broad molecular weight polymers are produced having excellent die swell characteristics and acceptable environmental stress cracking resistance and flow properties; this is achieved and while at the same time realizing high productivities.

REFERENCES:
patent: 2963447 (1960-12-01), Peters et al.
patent: 3158594 (1964-11-01), Weil et al.
patent: 3639381 (1972-02-01), Craven

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