The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1992
Filed:
Jun. 02, 1989
Stamicarbon B.V., Geleen, NL;
Abstract
The subject invention relates to a process for preparing a polymer substantially formed from ethylene modified with at least one linear .alpha.,.omega.-diene. In particular, the process involves reacting ethylene with the at least one diene in an inert dispersant. The reaction is carried out in the presence of a magnesium, aluminum, and titanium- and/or vanadium-containing catalyst at a polymerization temperature of at least 135.degree. C. The at least one diene utilized has at least 7 carbon atoms, two non-conjugated double bonds, and is at least 0.001 mole % but less than 0.1 mole % of the total polymer. Furthermore, the at least one diene must be present in an amount small enough such that the activation energy of the viscous flow of the polymer formed is not significantly influenced by the presence of the diene.