ALUMINUM HYDROXIDE POWDER FOR FILLING RESIN AND RESIN COMPOSITION USING THE SAME

摘要

PURPOSE: Provided are an aluminum hydroxide powder which is highly fillable in a resin with reducing viscosity and shortens the curing time when filled in thermosetting resin, and a resin composition using the aluminum hydroxide powder. CONSTITUTION: The aluminum hydroxide powder is characterized in that the composition ratio of: aluminum hydroxide powder(X) with a BET specific surface area of 1.0 m2/g or less and secondary particle size of 35-150 micro meter; aluminum hydroxide powder(Y) with a BET specific surface area of =1.0 m2/g or less and secondary particle size of 10-35 micro meter; and aluminum hydroxide powder(Z) with a BET specific surface area of 3.0 m2/g or less and secondary particle size of 0.5-10 micro meter, is enclosed by four points alpha, beta, gamma and delta in the three-component compositional diagram shown in figure 1 and also includes the peripheral line.