Avoidance of colored impurities in the preparation of ultrahigh

Details Avoidance of colored impurities in the preparation of ultrahigh Avoidance of colored impurities in the preparation of ultrahigh

1989-09-19

1991-07-23

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, 526114, 526124, 526213, 526352, 526901, C08F 234, C08F 416

Patent

active

050344811

ABSTRACT:
Ultrahigh molecular weight ethylene polymers are prepared in the gas phase in a thoroughly mixed bed of finely divided polymer by continuous introduction of the monomer into a polymerization system at 60.degree.-120.degree. C. and 5-60 bar in the presence of a reaction product of a titanium-containing catalyst and an antistat.

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patent: 3956252 (1976-05-01), Saeda et al.
patent: 4182810 (1980-01-01), Willcox
patent: 4220580 (1980-09-01), Rowatt
patent: 4532311 (1985-07-01), Fulks et al.
patent: 4713430 (1987-12-01), Kerth et al.
patent: 4900798 (1990-02-01), Kerth et al.
Chemical Engineering, vol. 80, pp. 72-73, 11/1973.
Chemical Abstract, vol. 83, pp. n.116444, p. 114, (1975).
Chemical Abstract, vol. 94, n. 16340, p. 18 (1981).

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