Abstract: The elastic member for an ink jet recording apparatus according to the present invention is formed from: (1) a thermoplastic elastomer composition comprising 100 parts by weight of (a) a hydrogenated block copolymer, 60 to 170 parts by weight of (b) a softening agent for a non-aromatic rubber and 5 to 30 parts by weight of (c) polypropylene, (2) a thermoplastic elastomer composition in which a network structure having a pore diameter of 50 ?m or less is formed, comprising 100 parts by weight of (a) a hydrogenated block copolymer, 60 to 170 parts by weight of (b) a softening agent for a non-aromatic rubber and 5 to 30 parts by weight of (c) crystalline polyolefin, or (3) a thermoplastic elastomer composition in which a shear rate dependency of a melt viscosity measured by means of a capillograph is ?1.5 to ?0.

Abstract: A gasket integrated with a cover wherein a gasket material composed of a thermoplastic elastomer composition is integrally fixed to the cover having a shape of multistep contraction over at least two contraction steps, a gasket wherein the cover and the gasket are integrally molded and after molding, are subjected to a heating treatment at a temperature not lower than the temperature at which an adhesive component in materials constituting the gasket initiates crystal fusion or glass transition, or a gasket wherein the cover and the gasket are integrally molded and a covering layer composed of a fluoropolymer is formed on the gasket surface on atmospheric side are proposed. According to the present invention, a gasket integrated with a cover for a hard disc device which gasket is excellent in adhesive property and productivity, and is minimized in permeability and penetration of substances is provided.

Abstract: The elastic member for an ink jet recording apparatus according to the present invention is formed from:

Abstract: A rubber composition comprising a sulfur-vulcanizable rubber, N,N'-dithiodiamine, a thermosetting resin and a curing agent has a high dynamic modulus in the vulcanizate. A tire using the vulcanizate as a bead filler rubber has improved impact absorbing property and vibration damping property and is excellent in the ride feeling.

Abstract: A high polymeric substance having isocyanate group is produced by reacting a liquid high polymeric substance containing carbon-to-carbon unsaturated double bond or a solution of said high polymeric substance with a cyanate, an alkyl hypohalite and an organic carboxylic acid.

Abstract: An ion exchanger is produced by reacting a substance containing carbon-to-carbon unsaturated double bond with a solution of iodine isocyanate in an organic solvent and then reacting the resulting isocyanate group added to said substance with a compound having the following formula(X).sub.n R(Y).sub.m or XYwherein X represents an addition active group to the isocyanate group, Y represents an ion-exchanging group or a chelating group, R represents an organic radical having any valence of from 2 to 6 and a molecular weight of 20 to 1000, and n and m are selected from integers of 1 to 5, respectively, provided that a sum of n and m is equal to the valence of R, to introduce the ion-exchanging group having ion-exchanging properties into said substance.

Abstract: Urethane rubber composition having an improved cut-crack resistance and a high modulus is obtained by incorporating chopped organic fibers having a diameter of 1-50.mu. and an aspect ratio of 50-1,000 to urethane rubber.

Abstract: A method for improving the adhering ability of a vulcanized rubber surface by treating said surface with a solution of iodine isocyanate or a mixed solution of iodine isocyanate and iodine to provide a high adhering ability to said surface.The thus treated vulcanized rubber surface can be adhered strongly to other vulcanized rubber or the other various materials by contacting these materials tightly using an adhesive or without using an adhesive.