Patent ID: 7857990
Filing Date: 2010-12-28
Classification: A01N,C02F

Abstract:
1. A composition comprising a mixture of: (i) a major amount of solid calcium hypochlorite, and (ii) an amount of hydrophobic additive that is sufficient to provide a calcium hypochlorite composition having reduced hydrophilic properties, said composition being substantially free of discrete particulate Group IIA and IIIA metal stearate, said hydrophobic additive being a particulate calcium hypochlorite-compatible carrier material chosen from inorganic metal oxide and clay material, the surface of which has been treated with hydrophobizing agent represented by one of the following general formulae, wherein (a) M is independently chosen from silicon, titanium or zirconium; (b) each R 1 is independently chosen from a saturated hydrocarbon group containing from 1 to 18 carbon atoms; (c) each X is independently chosen from alkoxy containing from 1 to 12 carbon atoms, or acyloxy containing from 1 to 12 carbon atoms; (d) a is a number chosen from 1 to 4, (e) each R 2 is independently chosen from halo, hydroxy, or R 1 with the proviso that at least 50 mole percent of the R 2 substituents are saturated hydrocarbon groups; (f) n is a number of from 2 to 10,000; (g) m is a number of from 3 to 20, (h) R 3 is chosen from an aliphatic, cycloaliphatic or aryl hydrocarbon containing from 1 to 6 carbon atoms, cyclohexyl, vinyl or phenyl, or a glycidoxy alkyl group, and (i) p is a number chosen from 4 to 1000, the weight ratio of hydrophobizing agent to carrier material being from 1:1 to 1:20.