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. 17, 1993
Filed:
Apr. 13, 1992
Idemitsu Petrochemical Company Limited, Tokyo, JP;
Abstract
Disclosed is a composition of polybutene-1 comprised of a polymer resulting from preliminarily polymerization of a small amount of an .alpha.-olefin, which has an intrinsic viscosity [.eta.]p of 7 dl/gram or lower, as measured at 135.degree. C. in a decalin solution; and a homopolymer of butene-1 or a copolymer of butene-1 and 20% by weight of an .alpha.-olefin other than butene-1, the composition of polybutene-1 having an intrinisic viscosity [.eta.]t of 0.5-7.0 dl/gram, when measured at 135.degree. C. in a decalin solution, and satisfying the following relationship with respect to the intrinsic viscosity [.eta.]p:[.eta.]p.ltoreq.2.5.times.[.eta.]r. The composition provides resulting films with highly improved appearance and with a lesser number of gel and fish eyes.