Patent · US Expired

Manufacture of high-pressure polyethylene

US4177340A · kind A · utility

2Cited by

6References

4Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Boettcher
Heinrich G. Hoerdt · Zeven, DE
Klaus Pfleger · Wesseling, DE
Wieland Zacher
Hans Gropper · Schifferstadt, DE

Key dates

Filing date	Nov 30, 1977
Grant date	Dec 4, 1979
Priority date	—
Expiry date	Nov 30, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F110/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the manufacture of ethylene polymers by polymerizing ethylene under high pressures and at high temperatures in the presence of from 0.01 to 0.5 percent by weight of an alkyl ester (alkyl being of 1 to 8 carbon atoms) of an alkenemonocarboxylic acid of 3 or 4 carbon atoms. n-Butyl acrylate is a particularly suitable polymerization activator. Although the start temperature of the ethylene polymerization is relatively low, there is no difference in mechanical and optical properties of a blown film manufactured from the resulting ethylene polymer and of a blown film of pure polyethylene.

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