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:
Jun. 08, 1982
Filed:
Sep. 12, 1980
Applicant:
Inventors:
Masaki Fujii, Yokkaichi, JP;
Mitsutaka Miyabayashi, Yokkaichi, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525321 ; 525323 ;
Abstract
A propylene block copolymer comprising propylene, ethylene and a straight-chain .alpha.-olefin of 5 to 12 carbon atoms is characterized in that: its limiting viscosity is 0.3 to 15 dl/g (at 135.degree. C., in decalin); it comprises specified quantities of these monomers; and when it is subjected to successive extraction with o-dichlorobenzene at 40.degree. C. and 80.degree. C., the quantities, fusion peak temperatures, and content of the .alpha.-olefin of the resulting fractions are respectively within specific limits of values.