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:
Aug. 11, 1998
Filed:
Dec. 08, 1995
Itaru Natori, Kanagawa-ken, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
Disclosed is a cyclic conjugated diene polymer comprising a main chain represented by the formula (I): ##STR1## wherein A to E are monomer units constituting the main chain in which A to E are arranged in any order, and l to p are, respectively, weight percentages of A to E, based on the total weight of A to E; A is selected from cyclic conjugated diene monomer units, B is selected from chain conjugated diene monomer units, C is selected from vinyl aromatic monomer units, D is selected from polar monomer units, and E is selected from an ethylene monomer unit and .alpha.-olefin monomer units; and l to p satisfy the following requirements: 0.5.ltoreq.l.ltoreq.100, 0.ltoreq.m, n, o, p<100, wherein when l=100 and the A monomer units are comprised of monomer units which are the same, the polymer has a number average molecular weight Mn of from 40,000 to 5,000,000, wherein when l=100 and the A monomer units are comprised of monomer units which are different, the polymer has an Mn of from 25,000 to 5,000,000, and wherein when 0.5.ltoreq.l<100, the polymer has an Mn of from 500 to 5,000,000. The cyclic conjugated diene polymer has excellent thermal and mechanical properties. The polymer can be advantageously produced using a catalyst comprised of a complex of an organometallic compound containing a Group IA metal with a complexing agent, especially an amine.