Patent · US Expired

Method for copolymerizing ethylene with vinyl carboxylates

US6300430A · kind A · utility

5Cited by

3References

7Claims

0Family size

Assignee

BASF SE

Inventors

Andreas Deckers · Flomborn, DE
Wilhelm Weber · Neustadt, DE
Ulrich Annen · Nümbrecht, DE

Key dates

Filing date	Mar 14, 2000
Grant date	Oct 9, 2001
Priority date	—
Expiry date	Mar 14, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2423/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process is described for copolymerizing ethylene with vinyl esters and, if desired, with further vinylic comonomers in a tube reactor at pressures of from 500 to 4000 bar and at not more than 220.degree. C., which comprises initiating the free-radical polymerization at at least two locations of the tube reactor by adding a catalyst/initiator and adjusting the temperature profile within the reactor such that the temperature maxima downstream of the initiation locations are from 150 to 220.degree. C. and differ by less than .+-.10.degree. C. from one another.

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