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1. (WO2018085300) METHODS OF USING LEUCO COLORANTS AS BLUING AGENTS IN LAUNDRY CARE COMPOSITIONS

Pub. No.:    WO/2018/085300    International Application No.:    PCT/US2017/059413
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: C11D 3/40
C11D 3/42
C11D 11/00
Applicants: THE PROCTER & GAMBLE COMPANY
Inventors: DITULLIO, Daniel, Dale
MIRACLE, Gregory, Scot
QIN, Haihu
DEY, Sanjeev, Kumar
VALENTI, Dominick, Joseph
Title: METHODS OF USING LEUCO COLORANTS AS BLUING AGENTS IN LAUNDRY CARE COMPOSITIONS
Abstract:
A method for treating textile articles includes the steps of: (a) providing a laundry care composition comprising a leuco composition; (b) adding the laundry care composition to a liquid medium comprising an converting agent; (c) placing the textile articles in contact with the liquid medium; (d) converting at least some portion of the leuco composition to form an oxidized leuco composition; (e) depositing at least a portion of the oxidized leuco composition onto the textile; (f) optionally, rinsing the textile; and (g) drying the textile articles, wherein the textile article has a Leuco Whiteness Improvement Number (LWIN) of at least 5% after drying.