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:
Jul. 07, 1998
Filed:
Jun. 25, 1997
Cornelis Martinus Van Dijk, Amsterdam, NL;
Paulus Alexander Grotenhuis, Amsterdam, NL;
Marc Stephen Sonderman, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
Purifying reagent for the purification of starting materials to be used in a metal compound catalyzed polymerization, containing proton donating reactive contaminants, consisting of a solid product, obtainable by the metallation of a product of a nucleophilic displacement reaction between a halogen alkylated crosslinked poly(vinylaromatic) resin and a metallated conjugated diene compound, which product is insoluble inorganic solvents, which is not able to initiate anionic polymerization of olefins or dienes and which is able to scavenge proton donating contaminants, which may hamper polymerizations catalysted by metal organic compounds; and process for purification of starting materials applying said purifying reagent.