Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-01-26
1990-05-08
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526 90, 526 95, 526107, 526185, B01J 800
Patent
active
049239350
ABSTRACT:
A process for producing polyethylene of ultrahigh molecular weight having an intrinsic viscosity of 10-30 dl/g at 135.degree. C. in decalin is disclosed which comprises at least the following two stages of polymerization reaction: (a) a first reaction stage where in ethylene is polymerized with use of a catalyst comprising a solid component containing at least Mg, Ti and/or Va and in the absence or presence of hydrogen of reduced concentration to produce 70-99.5 weight parts of polyethylene having an intrinsic viscosity of 12-32 dl/g at 135.degree. C. in decalin; and (b) a second reaction stage wherein a fresh feed of ethylene is polymerized in the presence of hydrogen of higher concentration to produce 30-0.5 weight parts of polyethylene having an intrinsic viscosity of 0.1-5 dl/g at 135.degree. C. in decalin.
REFERENCES:
patent: 4786687 (1988-11-01), Sano et al.
Kuroishi Tetsujiro
Matsuura Kazuo
Miyazaki Yasunosuke
Sano Akira
Yokoyama Shigeki
Nippon Oil Co. Ltd.
Schofer Joseph L.
Weber Tom
LandOfFree
Process for producing polyethylene of ultrahigh molecular weight 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 polyethylene of ultrahigh molecular weight, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing polyethylene of ultrahigh molecular weight will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2349785