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:
Feb. 10, 2009
Filed:
Dec. 26, 2003
Shigenobu Ikenaga, Sodegaura, JP;
Keiji Okada, Sodegaura, JP;
Hiroshi Hoya, Ichihara, JP;
Norihide Inoue, Ichihara, JP;
Naritoshi Hirota, Sodegaura, JP;
Hiromu Kaneyoshi, Sodegaura, JP;
Munehito Funaya, Sodegaura, JP;
Koji Kawai, Sodegaura, JP;
Nobuo Kawahara, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Ryoji Mori, Sodegaura, JP;
Shigenobu Ikenaga, Sodegaura, JP;
Keiji Okada, Sodegaura, JP;
Hiroshi Hoya, Ichihara, JP;
Norihide Inoue, Ichihara, JP;
Naritoshi Hirota, Sodegaura, JP;
Hiromu Kaneyoshi, Sodegaura, JP;
Munehito Funaya, Sodegaura, JP;
Koji Kawai, Sodegaura, JP;
Nobuo Kawahara, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Ryoji Mori, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A propylene/1-butene random copolymer containing 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75° C. and a crystallization rate at 45° C. of 10 minutes or less, and satisfying the following relation, 146 exp (−0.022M)≧Tm≧125 exp (−0.032M), and an olefin catalyst for preparation thereof.