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:
Jul. 24, 1990
Filed:
Aug. 26, 1988
Takashi Yamawaki, Ichihara, JP;
Idemitsu Petrochemical Company Limited, Tokyo, JP;
Neste Oy, Keilaniemi, FI;
Abstract
The present invention relates to an olefin copolymer composition, which olefin copolymer composition contains (A) 25 to 97 wt. % of a propylene copolymer, and (B) 75 to 3 wt. % of a butene-1 copolymer having a content of .alpha.-olefin unit with 2 to 8 carbon atoms of 1 to 35 mol %, an intrinsic viscosity of 0.9 to 7.2 dl/g measured in decalin heated to 150.degree. C., a value of weight-average molecular weight/number-average molecular weight of 4 to 15, a temperature difference of 2.degree. to 40.degree. C. between the highest value and the lowest value of the melting point measured by the differential scanning calorimetric analysis, and a .alpha.-olefin block property of 0.015 or lower measured by the nuclear magnetic resonance spectral analysis, can provide molded items excellent, for example, in heat-sealing properties, transparency, blocking resistance, and surface gloss, and is good in processability.