Benckiser-knapsack Gmbh

Hoechst Aktiengesellschaft

Hans-Adolf Rohlfs

Guenter Raab

Viktor Specht

Michael Vogt

Alfred Kling

Ulrike Schaetzke

Joachim Kandler

Klaus Hestermann

Klaus Sommer

Horst-Dieter Wasel-Nielen

Werner Gohla

Karl Merkenich

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

The invention provides cleaning and detergent compositions which contain about 0.2 to 5 weight % of at least one compound of the general formula (I) ##STR1## in which R stands for a hydrogen atom or a methyl group and R.sub.1 stands for a hydrogen atom or an alkali metal or NH.sub.4 -ion.

Detergent and cleaning compositions

Growing community of inventors

Heidelberg, Germany

Hans-Adolf Rohlfs