Patent · US Expired

Manufacture of ethylene polymers

US3987020A · kind A · utility

3Cited by

5References

2Claims

0Family size

Assignee

BASF SE

Inventors

Hans Gropper · Schifferstadt, DE
Dieter Oeder · Bad Dürkheim, DE
Friedrich Urban

Key dates

Filing date	Apr 18, 1975
Grant date	Oct 19, 1976
Priority date	—
Expiry date	Apr 18, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F210/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Ethylene polymers are produced at pressures between 1000 and 4000 atmospheres and temperatures of from 120.degree. to 300.degree. C in a reaction zone having an 1/d ratio of from 10:1 to 20:1 while shear forces act on the reaction mixture. The ethylene is fed continuously and radially to the reaction zone at a velocity of from 2 to 20 m/sec. The average residence time of the reaction mixture in the reaction zone is from 20 to 90 seconds. The products show a broad molecular weight distribution and are particularly advantageous for use as extruded coatings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.