Preparation of ethylene polymers by the high-pressure method

Details Preparation of ethylene polymers by the high-pressure method Preparation of ethylene polymers by the high-pressure method

2005-09-27

2005-09-27

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymerizing in tubular or loop reactor

C526S208000, C526S318250, C526S324000, C526S329000, C526S331000

Reexamination Certificate

active

06949611

ABSTRACT:
A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula Iwhere R1and R2are identical or different and are selected from among C1-C6-alkyl and C3-C12-cycloalkyl and R1and R2may also be covalently linked to one another to form a 4- to 13-membered ring, prior to the polymerization,compressing the solution, metering it into the polymerization reactor at one or more points and subsequently carrying out the polymerization at from 150 to 380° C. and from 500 to 4500 bar.

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