Aminomethylenephosphonate-coated granules

Details Aminomethylenephosphonate-coated granules Aminomethylenephosphonate-coated granules

C - Chemistry, Metallurgy

09

C

134/5.3, 117/47.

C09C 1/28 (2006.01) C09C 3/08 (2006.01) C11D 3/08 (2006.01) C11D 7/54 (2006.01)

Patent

CA 1276511

AMINOMETHYLENEPHOSPHONATE-COATED GRANULES ABSTRACT OF THE DISCLOSURE 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: Image where each R is H, CH2PO3H2 or CH2PO3HM or CH2PO3M2; 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.

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