Pyrrolidone-5,5-diphosphonic acids

Details Pyrrolidone-5,5-diphosphonic acids Pyrrolidone-5,5-diphosphonic acids

1974-08-20

1976-06-01

Ore, Dale R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 499, 252175, 252381, 2603265FN, 423555, 424DIG6, 424 49, 424200, C07D20724

Patent

active

039608883

ABSTRACT:
Pyrrolidone-5,5-diphosphonic acids having the formula ##EQU1## wherein R is a member selected from the group consisting of hydrogen and alkyl having from 1 to 6 carbon atoms; as well as their water-soluble salts. The pyrrolidone-5,5-diphosphonic acids are excellent sequestering agents especially for alkaline earth metal ions. They are stabilizers for percompounds and are useful in the delaying of the setting times for gypsum. In addition, the compounds are useful as cosmetic preparations such as toothpastes and mouthwashes where they prevent formation of tartar and plaque and are useful in therapy in the treatment of diseases related to the abnormal deposition or dissolution of difficultly soluble calcium salts in the animal body.

REFERENCES:
patent: 2644002 (1953-06-01), Hoegberg
patent: 2706194 (1955-04-01), Morris et al.
patent: 2844582 (1958-07-01), Raley, Jr.
patent: 2865912 (1958-12-01), Pohlemann et al.
patent: 2902493 (1959-09-01), Lorenz et al.
patent: 3448118 (1969-06-01), Chickery et al.
patent: 3846420 (1974-11-01), Wollmann et al.

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