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. 20, 1990
Filed:
Jun. 17, 1988
Edison Polymer Innovation Corp. (EPIC), Broadview Heights, OH (US);
Abstract
A polymerization process for preparing triblock copolymers and multiblock copolymers. The process includes the polymerization of isobutylene below about -40.degree. C. in a reaction mixture which includes a titanium halide, a mixed solvent, and an initiator compound selected from the group consisting of cumyl ester and cumyl ether compounds. In at least some instances, the components are added in a particular order, sometimes together with a moisture scavenger. After formation of the polyisobutylene, a diene is added to the mixture containing the polyisobutylene and polymerized to form the desired copolymer. The diene portion of the copolymer may subsequently be cyclized to produce a copolymer exhibiting both thermoplastic and elastomeric properties. If desired the block copolymers can be subsequently modified to include functional side groups, or to provide photocuring capabilities.