Mitsui Chemicals, Inc.

Shigeharu Fujii

Akinori Etoh

Setsuko Oike

Tomokazu Ishizuka

Kiyotaka Shindo

Shoji Tamai

Yuichi Okawa

Takashi Kuroki

Satoko Fujiyama

Tomoyuki Nakata

Takehiko Omi

Kazuhisa Miyazaki

Junichi Ishikawa

Disclosed is a polishing slurry which enables to suppress damages to an under layer while securing an adequate polishing rate. The polishing slurry contains a resin (A) having an amide group and an organic resin (B).

Polishing slurry and polishing material using same

Disclosed is a polishing composition containing not less than 1 wt % of a water-soluble resin, which is obtained by polymerizing a vinyl monomer containing an amino group and/or an amide group, based on the total weight of the polishing composition.

Polishing composition

The invention provides a crosslinkable aromatic resin having a protonic acid group and a crosslinkable group, suitable for electrolytic membranes and binders used in fuel cells, etc., and electrolytic polymer membranes, binders and fuel cells using the resin. The crosslinkable aromatic resin has a crosslinkable group, which is not derived from the protonic acid group and can form a polymer network without any elimination component. This resin exhibits excellent ion conductivity, heat resistance, water resistance, adhesion property and low methanol permeability. Preferably, the crosslinkable group is composed of a Cto Calkyl group directly bonded to the aromatic ring and/or an alkylene group having 1 to 3 carbon atoms in the main chain in which at least one carbon atom directly bonded to the aromatic ring bonds to hydrogen, and a carbonyl group, or a carbon-carbon double bond or triple bond. The aromatic resins such as aromatic polyethers, aromatic polyamides, aromatic polyimides, aromatic polyamideimides, aromatic polyazoles, etc., which contain such a crosslinkable group, are preferred as the crosslinkable aromatic resins having a protonic acid group and a crosslinkable group.

Crosslinkable aromatic resin having protonic acid group, and ion conductive polymer membrane, binder and fuel cell using the resin

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Ichihara, Japan

Shigeharu Fujii