Polymeric alkylene diphosphonate anhydrides, their production an

Details Polymeric alkylene diphosphonate anhydrides, their production an Polymeric alkylene diphosphonate anhydrides, their production an

1987-02-02

1988-01-12

Albrecht, Dennis

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

252 82, 252 87, 25217416, 252DIG11, 260545P, 422 7, 422 15, 528398, C02F 514, C11D 336, C11D 337

Patent

active

047190310

ABSTRACT:
Polymeric phosphonate anhydrides are formed by dehydrating a reaction mixture comprising a salt of a diphosponic acid. The invention includes the polymeric phosphonate, its method of preparation, and a primary use.

REFERENCES:
patent: 3585166 (1971-06-01), Kerst
patent: 3890228 (1975-06-01), Hwa
patent: 4209487 (1980-06-01), Hogue
patent: 4267125 (1981-05-01), Dursch et al.
patent: 4663053 (1987-05-01), Geiger
patent: 4680124 (1987-07-01), Young
Nweke, Soguzie et al., J. Inorg. Chem., vol. 16 (1977), pp. 860-863.

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