Stauffer Chemical Company

Carolyn A Ertell

Johst H Burk

Christian G Michel

Carl G Gustafson

A granular anhydrous dicalcium phosphate having a particle of a size sufficient for direct compression tablets and a surface area of greater than 5 meters.sup.2 /gram can be direct compression tableted. This product can be prepared by dehydrating granules of dicalcium phosphate dihydrate of a particle size sufficient for direct compression tableting and sufficiently large to allow the dehydration of the granules without lumping and without fracturing a majority of the granules. The granules are heated at a temperature sufficient to form anhydrous dicalcium phosphate. The product is a granular anhydrous dicalcium phosphate exhibiting good compressibility, flowability and whiteness while being in an anhydrous state.

Granular anhydrous dicalcium phosphate compositions suitable for direct

Novel self-setting potassium-aluminum-phosphate compositions of matter are prepared by forming an aqueous slurry of a potassium source, an aluminum source and a phosphate source; mixing the slurry for a period of time sufficient to form a reactive, creamy mass having a viscosity of at least 2000 cps; and setting or curing the reactive creamy mass. The product is porous, can be foamed or nonfoamed, adheres well to substrates and when foamed, can be lightweight.

Growing community of inventors

Yonkers, NY, United States of America

Carolyn A Ertell