Granular aminomethylenephosphonate

Details Granular aminomethylenephosphonate Granular aminomethylenephosphonate

1986-02-21

1987-05-19

Willis, Prince E.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252 95, 252131, 252140, 252155, 25217413, 25217425, 252545, 25217416, 252DIG17, 428403, C11D 312, C11D 339, C11D 736

Patent

active

046666230

ABSTRACT:
Aminomethylenephosphonate-coated granules of substantially water-insoluble silicate having improved stability in the presence of peroxygen compounds. Such coatings can comprise alkali metal aminomethylenephosphonate of the formula: ##STR1## where each R is H, CH.sub.2 PO.sub.3 H.sub.2 or CH.sub.2 PO.sub.3 HM or CH.sub.2 PO.sub.3 M.sub.2 ; where M is an alkali metal; and n is 0 or an integer, preferably an integer of from 1 to 4. The coatings are substantially free of peroxygen compounds and peroxy compound precursors.

REFERENCES:
patent: 4072622 (1978-02-01), Kuhling et al.
patent: 4231887 (1980-11-01), Denny et al.
patent: 4392974 (1983-07-01), Hachmann et al.
patent: 4552681 (1985-11-01), Koch et al.

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