Benckiser-knapsack Gmbh

Mtu Motoren-und Turbinen-union Muenchen, Gmbh

Michael Vogt

Guenter Raab

Viktor Specht

Alfred Kling

Hans-Adolf Rohlfs

Ulrike Schaetzke

Peter Adam

Adolf Nebelung

A process for the production of a layer of hydroxyapatite (HA) on metallic and non-metallic bodies for implants is disclosed, wherein a layer of .alpha.- or .beta.-tricalcium phosphate (TCP) is applied and this is then completely converted into pure HA by reaction with water at an elevated temperature.

Hydroxylapatite coating on metal or ceramic

Disclosed are novel N-(hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids and N,N-Bis-(hydroxy-methyl)-1-amino alkane-1,1-diphosphonic acids, preferably N-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, N,N-Bis-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, and their water-soluble salts. Also disclosed is a method for preparing these compounds by reacting the corresponding 1-amino alkane-1,1-diphosphonic acids with formaldehyde in an alkaline medium at elevated temperature. The new phosphonic acid compounds are excellent stabilizing agents for hydrogen peroxide-containing alkaline bleaching liquors, especially useful for bleaching cellulose fibers and blends thereof with synthetic fibers, such as polyester fibers.

Method for bleaching cellulose fibers with N-(hydroxy methyl)-1-amino

N-(hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids as stabilizing

N-(Hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids, process of

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Moerlenbach, Germany

Michael Vogt