Two step process for polymerizing ethylene

Details Two step process for polymerizing ethylene Two step process for polymerizing ethylene

1980-05-20

1982-11-02

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in two or more physically distinct zones

252429B, 526 66, 526 79, 526339, 526348, 5263484, 5263485, 5263486, C08F 466

Patent

active

043574483

ABSTRACT:
Ethylene or a mixture of ethylene and a small amount of another .alpha.-olefin or diene is polymerized in two successive steps under different hydrogen partial pressures by polymerizing 30 to 70 wt. % of the ethylene or ethylene mixture to be polymerized in the presence of hydrogen at a molar ratio of ethylene or ethylene mixture to hydrogen of 1:1-8 in the first step and polymerizing the residual ethylene or the ethylene mixture at a molar ratio of ethylene to hydrogen of 1:0-0.3 in the second step, in the presence of the specific catalyst system comprising an organoaluminum compound (C) and a specific solid catalytic component (B) obtained by reacting a titanium or vanadium halogen-containing compound with a reaction product (A) obtained by reacting a Grignard reagent with a hydropoly-siloxane having the formula ##EQU1## (R.sup.1 represents an alkyl, aryl, aralkyl, alkoxy, or aryloxy group as a monovalent organic group; a is 0,1 or 2; b is 1, 2 or 3; and a+b.ltoreq.3)
or a silicon compound containing an organic group and hydroxyl group in the presence or absence of an aluminum-alkoxide, aluminum alkoxy-halide halide or a reaction product obtained by reacting the aluminum compound with water.

Affiliated with

Also associated with

Rating

Two step process for polymerizing ethylene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two step process for polymerizing ethylene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two step process for polymerizing ethylene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-624759