Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1993-01-29
1995-04-25
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526125, 526138, 526141, 526352, 526901, C08F 234
Patent
active
054100020
ABSTRACT:
The present invention relates to a process for the production of homopolymers of ethylene and copolymers of ethylene with olefins CH.sub.2 .dbd.CHR, wherein R is an alkyl or aryl radical having a number of carbon atoms of from 1 to 10, and having a density greater than 0.86 g/cm.sup.3, comprising at least one (co)polymerization step in the gas phase, in the presence of an active catalyst obtained from a titanium compound supported on a magnesium halide in active form and an Al-alkyl compound. The process is characterized in that a small amount compared with the polymer is fed to the gas-phase reactor of a polyfunctional compound having at least two groups, the same or different, capable of reacting with the alkyl aluminum compound and capable of selectively inhibiting the reactivity of the polymer particle fines compared with the average granulometric size of the polymer present in the bed of a gas-phase polymerization reactor.
REFERENCES:
patent: 3298792 (1967-01-01), Di Drusco
patent: 4218339 (1980-08-01), Zucchini et al.
patent: 4298718 (1981-11-01), Mayr et al.
patent: 4472520 (1984-09-01), Zucchini et al.
patent: 4495338 (1985-01-01), Mayr et al.
patent: 4518750 (1985-05-01), Govoni et al.
patent: 4526943 (1985-07-01), Fuentes, Jr. et al.
patent: 4673661 (1987-06-01), Lofgren et al.
patent: 4716206 (1987-12-01), Fujita et al.
patent: 4739015 (1988-04-01), Toyota et al.
patent: 4803251 (1989-02-01), Goode et al.
patent: 5028670 (1991-07-01), Chinh et al.
Govoni Gabriele
Patroncini Giovanni
Cave Bryan
Himont Incorporated
Schofer Joseph L.
Spherilene S.r.l.
Stiefel Maurice B.
LandOfFree
Process for the gas-phase polymerization of alpha-olefins 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 the gas-phase polymerization of alpha-olefins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the gas-phase polymerization of alpha-olefins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1568434