Nitto-denko Corporation

Minoru Ezoe

Masao Abe

Akira Ohtani

Hiroyuki Higuchi

Keiji Nakamoto

Michio Umeda

Shinya Akizuki

Yasuhiro Umemoto

Keiko Mochizuki

Yoshihiro Uetani

Kiichiro Matsushita

Toshihiko Shinomura

This invention relates to a conducting organic polymer formed by doping an organic polymer with a protonic acid having a dissociation constant value pKa of less than 4.8, wherein the organic polymer has, as the main repeating unit, a compound represented by the general formula: ##STR1## wherein, m and n, respectively, show the molar fraction of the quinonediimine structural unit and phenylenediamine structural unit in the repeating unit, and 0&lt;m&lt;1, 0&lt;n&lt;1, and m+n=1; and the organic polymer is soluble in an organic solvent in the undoped state, and has an intrinsic viscosity �.eta.! of more than 0.4 dl/g measured in N-methyl-2-pyrrolidone at 30.degree. C. This invention also relates to a film formed of the conducting organic polymer and a conducting organic polymer composition.

Organic polymer, conducting organic polymer, production methods and uses

A porous film comprising a composition of 10 to 90% by weight of polypropylene and 10 to 90% by weight of polyethylene having an Mw/Mn ratio, as determined by high-temperature gel-permeation chromatography, of 10 or less is disclosed. The porous film has a high tensile modulus, a satisfactory appearance, and a uniform thickness. A battery separator comprising the porous film performs a shut-down function (an increase in resistance) in case of a temperature rise due to an abnormal current.

Porous film, process for producing the same, and use of the same

This invention relates to an organic polymer having, as the main repeating unit, the compound represented by the general formula: ##STR1## (wherein, m and n respectively show the molar fraction of quinonediimine structure unit and phenylenediamine structure unit in the repeating unit, and 0&lt;m&lt;1, 0&lt;n&lt;1, and m+n=1.), and soluble in an organic solvent in an undoped state, and having the intrinsic viscocity [.eta.] of more than 0.4 dl/g measured in N-methyl-2-pyrrolidone at 30.degree. C., and a conducting organic polymer formed by doping a protonic acid to such a polymer.

An organic polymer solution comprising an organic solvent and, dissolved therein, (a) an organic polymer which has an imino-p-phenylene structural unit of the formula ##STR1## as a major repeating unit and is organic solvent-soluble, (b) a protonic acid having a pK.sub.a value of 4.8 or less or a derivative thereof, (c) at least one member selected from the group consisting of an oxidizing agent which does not have oxidizing ability at ordinary temperature but has oxidizing ability at temperatures not lower than 60.degree. C., and an oxidation catalyst.

Organic polymer solution

Growing community of inventors

Osaka, Japan

Minoru Ezoe