Patent ID: 7425313

Claim:
A process for manufacturing an aluminum-based filler that includes an aluminum oxide-hydroxide corresponding, with an exception of any impurities and water of hydration, to Formula I, wherein a and b are real numbers: Al(OH) a O b , where 0 <a <3 and b= (3− a )/2, (I) the process comprising: (i) reacting an aqueous solution of a Brönsted base and an aqueous solution of an aluminum salt under stuffing in order to precipitate an aluminum salt in a suspension of aluminum hydroxide; (ii) filtering and washing with water the suspension thus obtained to produce a filtrate; (iii) drying the filtrate under conditions such that agglomeration of hydroxide particles upon elimination of the water is limited; and (iv) heat-treating a product of (iii) so as to obtain an aluminum oxide-hydroxide.