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

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

1982-05-04

1985-04-09

Padgett, Ben R.

Compositions

Oxidative bleachant, oxidant containing, or generative

Composition containing a stabilizer or a product in the form...

25218621, 25218626, 25218628, 252400R, 2605025R, C09K 300, C07F 938

Patent

active

045100683

ABSTRACT:
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.

REFERENCES:
patent: 4029696 (1977-06-01), Sommer et al.
patent: 4337214 (1982-06-01), Rohlfs et al.

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