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:
Mar. 11, 2003
Filed:
Mar. 12, 1999
Kazutaka Hosokawa, Osaka, JP;
Yoshinori Nanba, Osaka, JP;
Takahisa Aoyama, Osaka, JP;
Tetsuo Shimizu, Osaka, JP;
Daikin Industries Ltd., Osaka, JP;
Abstract
A modified polytetrafluoroethylene fine powder containing agglomerates of colloidal particles with an average particle size of from 0.05 to 0.5 &mgr;m which comprise a copolymer of tetrafluoroethylene and an olefin-monomer represented by X(CF ) OCF═CF in which X is a hydrogen atom, a fluorine atom or a chlorine atom, and n is an integer of 1 to 6, and/or C F (OCF CF CF ) [OCF(CF )CF ] OCF═CF in which m and p are independently an integer of 0 to 4, provided that the sum of m and p is not 0 (zero), a content of the olefin monomer being from 0.02 to 0.3 wt. %, wherein the copolymer has a molecular weight distribution Mw/Mn of from 1.5 to 4.5 and a standard specific gravity of from 2.135 to 2.175. This modified polytetrafluoroethylene has good paste extrudability, and provides molded articles having good mechanical properties, in particular, pressure resistance.