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. 17, 2008
Filed:
Jan. 16, 2004
Ryoji Mori, Sodegaura, JP;
Takashi Nakagawa, Sodegaura, JP;
Mamoru Kagami, Sodegaura, JP;
Akira Todo, Minato-ku, JP;
Ryoji Mori, Sodegaura, JP;
Takashi Nakagawa, Sodegaura, JP;
Mamoru Kagami, Sodegaura, JP;
Akira Todo, Minato-ku, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The invention provides a propylene polymer composition well balanced and excellent in transparency, flexibility, heat resistance, scratch resistance and rubber elasticity, and a medical tube made from the propylene polymer composition. The propylene polymer composition satisfies all the following properties (A), (B), (C) and (D): (A) the composition shows a loss tangent (tan δ) peak at a temperature in the range of −20 to 25° C. according to dynamic viscoelasticity measurement (10 rad/s) in a torsion mode, and the peak is 0.5 or above; (B) the storage elastic modulus G' at 20° C. from the dynamic viscoelasticity measurement is in the range of 1.0×10to 4.9×10dyn/cm; (C) the penetration temperature (° C.) determined in accordance with JIS K 7196 is in the range of 60 to 160° C.; and (D) the composition has a permanent set of not more than 30% as determined after the composition fixed between chucks 30 mm apart is 100% strained at a stress rate of 30 mm/min, maintained for 10 minutes and released for 10 minutes. The medical tube is made from the propylene polymer composition.