Rare earth magnets and the rare earth magnet processing solution for using the same

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32 METHOD FOR PRODUCING NATURAL RUBBER MASTERBATCH ABSTRACT PROVIDED IS A METHOD FOR PRODUCING A NATURAL RUBBER MASTERBATCH INCLUDING THE STEPS OF : MIXING A NATURAL RUBBER LATEX WITH A SILICA FILLER SLURRY INCLUDING WATER AND AN INORGANIC F IL LER DISPERSED THEREIN TO OBTAIN A MIXTURE LIQUID; AND DRYING THEMIXTURELIQUID. INTHEMETHOD, THEMIXTURELIQUIDISBLENDED WITH A PARTICULAR CARBOXYLIC ACID HAVING TWO OR MORE CARBOXYL GROUPS AND A PARTICULAR AMINE.