Cationic nonionic blends for cleaning oily soils
Laundry detergent compositions that are neutral detergent containing a cationic amine surfactant in combination with nonionic surfactants are disclosed. The compositions beneficially remove difficult to treat soils, including food and industrial oils on polyester, cotton and polycotton blends, as part of a two-part cleaning wash process with an alkali step. Methods of using the neutral laundry detergent compositions are also disclosed.
1 . A laundry detergent composition comprising:
a cationic amine surfactant selected from the group consisting of: N-(3-aminopropyl)-Ndodecylpropane-1,3-diamine, N, N-Bis (3-aminopropyl) dodecylamine, NI,NI,N3-tris(3-aminopropyl)-N3-dodecyl propane-1,3-diamine, N1,N1-bis(3-aminopropyl)-N3-dodecyl propane-1, 3-diamine, N 1-(3-aminopropyl)-N3-dodecyl propane-1,3-diamine, N-dodecyl propane-1,3-diamine, N,N-bis(3-aminopropyl)-octylamine, N,N-bis(3-aminopropyl)-dodecylamine, 4-aminomethyl-1,8-octanediamine, 1,3,5-tris-(aminomethyl)-benzene, 1,3,5-tris-(aminomethyl)cyclohexane, tris-(2-aminoethyl)-amine, tris-(2-aminopropyl)-amine, tris-(3 aminopropyl)amine, N-(3-aminopropyl)-N-dodecyl propan-1,3-diamine, coco alkylbis(hydroxyethyl)methyl, ethoxylated, ammonium chloride, and combinations thereof;
from about 70 wt. % to about 90 wt. % of at least one nonionic surfactant; and water and/or a carrier suitable for a solid composition;
wherein a pH of the laundry detergent in a use composition is between about 7.5 to about 9.
2 . The composition of claim 1 , wherein the cationic amine surfactant is a multi-branched cationic amine, an ethoxylated amine, polyamine, or a quaternary ammonium compound.
3 . The composition of claim 1 , wherein the cationic amine is N-(3-aminopropyl)-N-dodecylpropan-1,3-diamine or a coco alkylbis(hydroxyethyl)methyl, ethoxylated, ammonium chloride.
4 . The composition of claim 1 , wherein the cationic amine surfactant comprises between about 0.5 wt. % to about 20 wt. % of the composition, and the water or carrier comprises between about 0.1 wt. % to about 50 wt. % of the composition.
5 . The composition of claim 1 , wherein the nonionic surfactants are a fatty alcohol alkoxylate, alcohol alkoxylate, EO/PO block copolymers, ethoxylated castor oil, alkyl polyglucosides, or combinations thereof.
6 . The composition of claim 1 , further comprising between about 0.1 wt. % to about 20 wt. % of at least one additional functional ingredient selected from the group consisting of optical brighteners, soil release polymers, solubility modifiers, dispersants, stabilizing agents, water conditioning agents, enzymes, builders, sequestrants, chelating agents, rheology modifiers, solubility modifiers, hydrotropes, couplers, alkalinity sources, and solvents.
7 . The composition of claim 1 , wherein the cationic amine surfactant comprises from about 1% to about 15% on an actives basis of the total surfactant concentration of the composition.
8 . A method of washing textiles comprising:
contacting textiles with the laundry detergent composition according to claim 1 and an alkalinity source comprising a source of alkalinity or an alkaline detergent composition; and
washing the textiles in an institutional or a household washing machine to remove soils.
9 . The method of claim 8 , wherein the contacting textiles comprises a 2-step cleaning wash process comprising first contacting the textiles with the laundry detergent composition at a pH between about 7.5 to about 9 during a wash cycle, and thereafter contacting the textiles with the alkali step to increase the pH above the pKa of the cationic amine surfactant.
10 . The method of claim 9 , wherein the contacting of the textiles with the alkali step increases the pH above 9.
11 . The method of claim 9 , wherein a second application of the laundry detergent composition at a pH between about 6 to about 9 during a wash cycle follows the alkali step.
12 . The method of claim 8 , further comprising diluting the laundry detergent composition at a point of use with water to form an aqueous use solution of the composition.
13 . The method of claim 8 , wherein the textile comprises at least one of polyester, cotton or polycotton blends.
14 . The method of claim 8 , wherein the wash cycle has a wash temperature about ≤150° F.
15 . The method of claim 8 , wherein the wash cycle provides about ≤500 ppm alkalinity for a low alkalinity laundry program.
16 . The method of claim 8 , wherein the wash cycle further comprises a bleaching step, antichlor step, souring step, a rinsing phase and/or a draining phase.
17 . The method of claim 8 , wherein the removal of soils is a reduction in visible residual oils on the textile, enhanced whiteness of the textile and/or reduction of soils with hygienically clean confirmation.