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:
Sep. 14, 1976
Filed:
Jan. 15, 1974
Applicant:
Inventors:
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08D / ; C08D / ;
U.S. Cl.
CPC ...
526 67 ; 2608 / ; 260887 ; 526 70 ; 526173 ; 526340 ;
Abstract
Novel rubbery polymer having a uniform and broad molecular weight distribution, a ratio of weight average molecular weight to number average molecular weight of 3 or more, a content of monovinyl aromatic compound of 0 to 30% by weight, a bonding manner of conjugated diolefin of 60% or more of 1,4-linkage and improved processability and physical properties can be obtained by circulating living polymer in the polymerization or copolymerization of conjugated diolefins or copolymerization of conjugated diolefin and monovinyl aromatic hydrocarbon carried out with a lithium-based catalyst.