Surface treatment of peroxyacids
AssigneeInterox Chemicals Limited
InventorsPaul L. Baxter, Michael J. L. Whiting
Life of this patent
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Abstract
Under conditions of misuse, water-soluble peroxyacids when they are left in direct contact with dyed fabrics can cause spotting and dye damage. The problem can be ameliorated by surface-treating the peroxyacid with an effective amount, preferably selected in the range of 8 to 25% w/w based on the peroxyacid, of aliphatic amines which melt or soften at about 30.degree. to 70.degree. C. Preferred agents include hydrogenated tallow amine dicocoamine and methyl dihydrogenated tallow amine. The agent can be applied in molten fashion or in inert solvent such as a chlorinated aliphatic hydrocarbon onto agitated particles of the peroxyacid.
Claims9
A process for treating a particulate water-soluble peroxyacid so as to ameliorate dye damage caused by contact between a particulate water-insoluble peroxyacid and a damp fabric, in which the particulate water-soluble peroxyacid is surface-treated with an effective amount of an amine which melts or softens at a temperature of from about 35.degree. C. to 60.degree. C., said amine being selected from hydrogenated tallow amine, dihydrogenated tallow amine, methyl dihydrogenated tallow amine and dicocoamine.
A particulate peroxygen composition having a reduced tendency to cause dye damage on damp fabric comprising particles having a core of a water-soluble peroxyacid and a coating around the core of from 8 to 30% by weight based on the core of an amine which melts or softens at a temperature of 35.degree. C. to 60.degree. C., said amine being selected from hydrogenated tallow amine, dihydrogenated tallow amine, methyl dihydrogenated tallow amine and dicocoamine.
Dependencies are inferred from the claim text.