Fujifilm Business Innovation Corp.

Fuji Xerox Co., Ltd.

Kosaku Yoshimura

Hidekazu Hirose

Yasunobu Kashima

Tomoya Sasaki

Hajime Sugahara

Kosuke Nakada

Satoshi Yoshida

Tetsuya Taguchi

Shinya Sakamoto

Shinya Nakashima

Tomoyo Okubo

Katsumi Nukada

Akira Imai

Takahiro Ishizuka

Emi Miyata

A polyimide precursor solution includes a polyimide precursor having a glass transition temperature Tg of equal to or higher than 300° C. after imidization, an aqueous solvent containing water, an organic amine compound, and resin particles having a volume average particle size of equal to or less than 100 nm.

Polyimide precursor solution, porous polyimide film, separator for secondary battery, and secondary battery

A particle-dispersed polyimide precursor solution contains a polyimide precursor having a unit represented by the following formula (I), particles, and a solvent, in which the particle-dispersed polyimide precursor solution satisfies both the following conditions (1) and (2),

Particle-dispersed polyimide precursor solution, method for producing porous polyimide film, and porous polyimide film

A particle-dispersed polyimide precursor solution contains: a polyimide precursor consisting of a polymer of a tetracarboxylic dianhydride and a diamine containing a fluorene-based diamine having a fluorene skeleton; particles; and an aqueous solvent containing water.

A polyimide precursor-containing aqueous composition contains at least one polymer material selected from the group consisting of a water-insoluble fibrous organic substance and a polyalkylene oxide having a viscosity-average molecular weight of 5 million or more, a polyimide precursor, particles, and water.

Polyimide precursor-containing aqueous composition, method for producing polyimide film, and method for producing porous polyimide film

There is provided a porous polyimide film in which the pore distribution width A represented by the following formula is 1.15 or less, the average pore diameter is within a range of 0.50 &#x3bc;m to 3.0 &#x3bc;m, and the air permeation speed is 30 seconds or less:=()

Porous polyimide film, lithium ion secondary battery, and all-solid-state battery

A porous polyimide film has plural pores, in which an average flattening of the plural pores is within a range of 0.1 to 0.7, a coefficient of variation of a distance between adjacent pores is within a range of 0.10 to 0.40, and a front surface and aback surface communicate with each other through the plural pores.

Porous polyimide film, secondary battery separator, and secondary battery

An all-solid-state battery includes a positive electrode active material layer containing a positive electrode active material; a negative electrode active material layer containing a negative electrode active material; and a solid electrolyte layer containing a solid electrolyte and a porous polyimide film which holds the solid electrolyte. The porous polyimide film has a void ratio of 60% or more and 80% or less and a pore diameter of 0.1 &#x3bc;m or more and 10 &#x3bc;m or less.

All-solid-state battery

A porous polyimide film has an acid value within a range of 7 mgKOH/g to 20 mgKOH/g determined by acid-base titration, contains a metal group including alkali metals excluding Li, an alkaline earth metals, and silicon at a total content of 100 ppm or less relative to the porous polyimide film, and has a moisture absorption ratio of 0.5% or less.

Porous polyimide film and battery

A porous polyimide shaped article has a thickness in a range from 550 &#x3bc;m to 3,000 &#x3bc;m and has a relative dielectric constant of 1.8 or less and a dielectric loss tangent of 0.01 or less at 1 MHz. The porous polyimide shaped article satisfies the following formula:1.2&#x2264;&#x2264;1.6wherein A represents a square root of a ratio of a pore size Dwhere a cumulative percentage by number of pores from smaller sizes is 84% to a pore size Dwhere the cumulative percentage by number of the pores from smaller sizes is 16% ((D/D)) in a pore size distribution measured by mercury intrusion porosimetry.

Porous polyimide shaped article

An electrostatic charge image developing toner includes toner particles containing a binder resin containing a polyester resin forming a sea part and a vinyl resin forming an island part of a sea-island structure, a first release agent existing in the sea part in a domain state, and a second release agent existing in the island part in a domain state, wherein when a cross-sectional area of the second release agent is set to A1 and a cross-sectional area of the first release agent is set to B1 in a cross section of the toner particles, a relationship of 0.2&#x2266;A1/B1&#x2266;0.8 is satisfied.

Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

An electrostatic charge image developing toner includes a binder resin and a release agent, and when a peak temperature during a first temperature increase and a peak temperature during a second temperature increase, that are obtained by differential scanning calorimetry including performing the first temperature increase at 10&#xb0; C./min after holding at 10&#xb0; C., performing cooling at &#x2212;10&#xb0; C./min, performing a heat treatment for 24 hours at 50&#xb0; C., and performing the second temperature increase at 10&#xb0; C./min, are represented by Tt1 and Tt2, respectively, the following Expression (1) is satisfied:1&#x3c;2.&#x2003;&#x2003;Expression (1):

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Kanagawa, Japan

Kosaku Yoshimura