Process for producing polyolefin

Details Process for producing polyolefin Process for producing polyolefin

1983-09-30

1985-04-16

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526124, C08F 410

Patent

active

045117047

ABSTRACT:
A polyolefin is producing by polymerizing ethylene or copolymerizing ethylene and the other .alpha.-olefin at 50.degree. to 100.degree. C. in a hydrocarbon solvent in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component which is a solid catalytic component containing a magnesium compound and a titanium compound under the condition (a) two step polymerizations of a first polymerization step and a second polymerization step in the presence of a reaction mixture obtained by said first polymerization step; (b) a polymerization in the presence of hydrogen at a molar ratio of H.sub.2 to C.sub.2 H.sub.4 (vapor phase) of 0.01-0.8 to produce a polymer A having a viscosity average molecular weight of 2.times.10.sup.5 -7.times.10.sup.5 at a ratio of 30 to 70 wt. % based on the total polymer in one of said first or second polymerization step and a polymerization in the presence of hydrogen at a molar ratio of H.sub.2 to C.sub.2 H.sub.4 (vapor phase) of 1.5-15 to produce a polymer B having a viscosity average molecular weight of 1.times.10.sup.4 - 4.times.10.sup.4 at a ratio of 70 to 30 wt. % based on the total polymer in the other polymerization step to give a ratio of a viscosity average molecular weight of polymer A to a viscosity average molecular weight of polymer B of 15 to 55; (c) said production of said polymer A as a copolymer of ethylene and other .alpha.-olefin and said production of said polymer B as a homopolymer of ethylene or a copolymer of ethylene and the other .alpha.-olefin; and (d) said production of the total polymer as a polymer having a melt index of less than 0.5 g/10 min.

REFERENCES:
patent: 3705886 (1972-12-01), Kashiwa
patent: 3900454 (1975-08-01), Sato
patent: 4088812 (1978-05-01), Matuura
patent: 4128607 (1978-12-01), Shiomura
patent: 4130699 (1978-12-01), Hoff
patent: 4223117 (1980-09-01), Sano
patent: 4233182 (1980-11-01), Hoff
patent: 4293673 (1981-10-01), Hamer
patent: 4322514 (1982-03-01), Miyoshi
patent: 4324875 (1982-04-01), Harada

Affiliated with

Also associated with

Rating

Process for producing polyolefin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing polyolefin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing polyolefin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1457185