초록 ▼

Particulate material, composites containing said material, and a method of making said particulate material. The material is composed of at least about 85% (number basis) of regular, well-defined ellipsoidal particles having a size less than about 25 microns, at least 90% and 50% by weight of the pa

Particulate material, composites containing said material, and a method of making said particulate material. The material is composed of at least about 85% (number basis) of regular, well-defined ellipsoidal particles having a size less than about 25 microns, at least 90% and 50% by weight of the particles being less than about 15 and 10 microns in size respectively, a surface area of about 0.75 to about 2.5 square meters per gram and a specific gravity of about 2 to 3. The composites contain this particulate material and up to about 99% of one or more polymeric media. The particulate material is produced by subjecting a diverse mixture of flyash particles to dry air classification in an air classifier controlled to recover particulate particles as described above.

대표청구항 ▼

A composite comprising from about 15 to 99% by volume of one or more polymeric media and about one to about 85% of particulate material composed of particles: at least about 85% of which (number basis) have a well-defined, regular, ellipsoidal shape; having a size less than about 25mwith at least ab

A composite comprising from about 15 to 99% by volume of one or more polymeric media and about one to about 85% of particulate material composed of particles: at least about 85% of which (number basis) have a well-defined, regular, ellipsoidal shape; having a size less than about 25mwith at least about 90% by weight of the particles having a size less than about 15m and at least about 50% being less than about 10m; the specific surface of the particles being in the range of about 0.75 to about 2.5 square meters per gram; said particles having a specific gravity of about two to three, and being composed substantially of alumino-silicate glass.