RUBBER MODIFYING MATERIAL, RUBBER LATEX-DISPERSED SOLUTION AND RUBBER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a rubber modifying material which uses a cellulose fiber, exhibits excellent dispersibility in a dispersion liquid and can provide a rubber composition having high elastic modulus and low heat generation properties.SOLUTION: A rubber modifying material contains a cellulose fiber, wherein a cellulose constituting the cellulose fiber is a cellulose having a phosphoric acid-derived group and/or a carboxylic acid-derived group. A rubber latex-dispersed solution contains the rubber modifying material and rubber latex. A rubber composition contains the rubber modifying material and rubber. A rubber composition is produced by using the rubber latex-dispersed solution.