US 5,686,015 AGranted

Quaternary substituted bleach activators

AssigneeThe Procter & Gamble Company

InventorsAlan David Willey, Gregory Scot Miracle, Kevin Lee Kott, Michael Eugene Burns, Gerard Marcel Abel Baillely, Nour-Eddine Guedira, Frederick Edward Hardy, Lucille Florence Taylor, Mark Robert Sivik

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

Bleaching compositions, laundry and automatic dishwashing detergent compositions comprising particular quaternary-substituted bleach activators, are provided. More specifically, the invention relates to compositions which provide enhanced cleaning/bleaching benefits though the selection of quaternary-substituted bleach activators having specific leaving groups with a conjugate acid pKa above 13 and with specific ratios of the rate of perhydrolysis to the rate of hydrolysis and the rate of perhydrolysis to the rate of diacylperoxide production. Included are preferred activator compounds and methods for washing fabrics, hard surfaces, and tableware using the activators.

Claims30

Dependent claims

A bleaching composition comprising:

(a) from about 0.1% to about 50% by weight of the composition of a source of hydrogen peroxide;
and
(b) from about 0.1% to about 50% by weight of the composition of a quaternary substituted bleach activator comprising:
(I) quaternary moieties QC(X)L;
and
(II) a charge balancing number of compatible counterions;
provided that:
1) L is a leaving group and comprises at least one tri-coordinate nitrogen atom covalently connecting L to the moiety --C(X)-- wherein LH, the conjugate acid of L, is non-charged or anionically charged and wherein the conjugate acid aqueous pK.sub.a of said L with respect to said tri-coordinate nitrogen atom is about 13 or greater;
L is selected from the group consisting of cyclic amidines having a ring size of from about 5 to about 12 atoms, anilino derivatives, and mixtures thereof;
2) Q comprises a tetravalent nitrogen atom, N.sup.+, wherein the tetravalent nitrogen atom is covalently connected to the moiety --C(X)L by a single, double, triple aliphatic, aromatic, or alkaryl linkage, and further wherein the atom Q to which the moiety --C(X)-- is bonded is a carbon atom;
when the linkage is aliphatic, the linkage comprises at least two carbon atoms between the tetravalent nitrogen atom and the moiety --C(X)--;
and X is selected from the group consisting of .dbd.O, .dbd.N-- and .dbd.S;
and further provided that the quaternary substituted bleach activator has a ratio of:
(i) k.sub.P /k.sub.H .gtoreq.1 wherein k.sub.P is the rate constant for perhydrolysis of the quaternary substituted bleach activator and k.sub.H is the rate constant for hydrolysis of the quaternary substituted bleach activator;
and a ratio of:
(ii) k.sub.P /k.sub.D >5 wherein k.sub.P is as defined in (i) and wherein k.sub.D is the rate constant for formation of a diacylperoxide from the quaternary substituted bleach activator;
and further provided that k.sub.H .gtoreq.10 M.sup.-1 s.sup.-1.

14 more elements

A bleaching composition comprising:

(a) from about 0.1% to about 50% by weight of the composition of a source of hydrogen peroxide;
and
(b) from about 0.1% to about 50% by weight of the composition of a quaternary substituted bleach activator comprising:
(I) quaternary moieties QC(X)L;
and
(II) a charge balancing number of compatible counterions;
provided that:
1) L is a leaving group and comprises at least one tri-coordinate nitrogen atom covalently connecting L to the moiety --C(X)-- wherein LH, the conjugate acid of L, is non-charged or anionically charged and wherein the conjugate acid aqueous pK.sub.a of said L with respect to said tri-coordinate nitrogen atom is about 13 or greater;
L is a lactam with a ring size of from about 6 to about 12;
2) Q comprises a tetravalent nitrogen atom, N.sup.+, wherein the tetravalent nitrogen atom is covalently connected to the moiety --C(X)L by a single, double, triple aliphatic, aromatic, or alkaryl linkage, and further wherein the atom Q to which the moiety --C(X)-- is bonded is a carbon atom;
when the linkage is aliphatic, the linkage comprises at least two carbon atoms between the tetravalent nitrogen atom and the moiety --C(X)--;
and X is selected form the group consisting of .dbd.N-- and .dbd.S;
and further provided that the quaternary substituted bleach activator has a ratio of:
(i) k.sub.P /k.sub.H .gtoreq.1 wherein k.sub.P is the rate constant for perhydrolysis of the quaternary substituted bleach activator and k.sub.H is the rate constant for hydrolysis of the quaternary substituted bleach activator;
and a ratio of:
(ii) k.sub.P /k.sub.D .gtoreq.5 wherein k.sub.P is as defined in (i) and wherein k.sub.D is the rate constant for formation of a diacylperoxide from the quaternary substituted bleach activator;
and further provide that k.sub.H .ltoreq.10M.sup.-1 s.sup.-1.

14 more elements

Dependencies are inferred from the claim text.