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. 27, 1979
Filed:
Aug. 25, 1977
Joseph Wagensommer, Westfield, NJ (US);
Pacifico V Manalastas, Jersey City, NJ (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
In a process for producing substantially gel free elastomers of isobutylene and a conjugated diene selected from the group consisting of cyclopentadiene, methylcyclopentadiene, isoprene or piperylene and mixtures thereof, improved products, higher catalyst efficiency, high cement concentrations and improved monomer conversions are obtained by the use of staged, or multiple reactors whereby the monomers and/or catalyst feeds may be divided among the reaction zones. The process provides elastomers which are substantially gel free having controlled molecular weight distribution (polydispersity) and high molecular weights at about 8 to about 45 mole % unsaturation.