Leuco polymers as bluing agents in laundry care compositions
AssigneeThe Procter & Gamble Company
InventorsGregory Scot Miracle, Sanjeev Kumar Dey, Haihu Qin
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Abstract
A method of obtaining a laundry care composition, the method comprising the steps of (a) reacting a reactive leuco compound with a polymer to form a leuco polymer and (b) mixing the leuco polymer with at least one laundry care ingredient. The reactive leuco compound comprises at least one leuco moiety and at least one nucleophilic group. The polymer comprises at least one group capable of reacting with said nucleophilic group. The leuco moiety has a maximum molar extinction coefficient at a wavelength in the range 400 to 750 nm of less than 1000 M−1 cm−1.
Claims20
A method of obtaining a laundry care composition, the method comprising the steps of (a) reacting a compound with a polymer to form a leuco polymer and (b) mixing the leuco polymer with at least one laundry care ingredient, wherein the compound comprises at least one leuco moiety and at least one nucleophilic group, wherein the polymer comprises at least one group capable of reacting with said nucleophilic group, wherein said leuco moiety has a maximum molar extinction coefficient at a wavelength in the range 400 to 750 nm of less than 1000 M−1 cm−1.
Dependencies are inferred from the claim text.