HEAT-RESISTANT RESIN-BONDED GRINDING WHEEL

PURPOSE:To improve the shaping workability and mechanical strength in heating by dispersing the grinding grains of diamond or cubic crystal boron nitride in a specific rate into the mixture of the modified polyaminomaleimide resin, silicon. carbide powder, and copper or silver powder. CONSTITUTION:A grinding wheel is made from the material which is formed by dispersing the grinding grains of diamond or cubic crystalline boron nitride in a rate of 10-40vol% of the whole volume, into the mixture of the modified polyaminomaleimide resin consisting of the aromatic hydrocarbon modified maleimide resin and polyamine, silicon carbide powder and copper or silver powder. As the aromatic hydrocarbon modified maleimide resin, is used the composition obtained by joining (a) the unsaturated bis-imide compound which is obtained from the aromatic group diamine, or polyamine conmpound, and the dicarboxylic acid, etc., having the ethylene type carbon-carbon double bond and (b) the aromatic hydrocabon formaldehyde reaction substance which is formed by reacting the aromatic hydrocarbon and formaldehyde reaction substance under the presence of the acid catalyst.