LAUNDRY LIQUID COMPOSITION

Abstract

A laundry liquid composition, comprising an anionic soil release polymer and a surfactant wherein the anionic soil release polymer comprises a fabric-binding region capped by one or more hydrophilic regions, wherein the fabric-binding region includes one or more anionic substituents and at least one end block/cap based on polyethylene glycol and/or polypropylene glycol, with a lower alkyl or hydrogen termination, and wherein the anionic soil release polymer may be a compound having formula (I) or, more preferably, formula (.sup.II) where each Y is independently selected from y.sup.A1, Y.sup.A2, Y.sup.N1 and Y.sup.N2wherein: y.sup.A1 is a 1,4-phenylene moiety having one or more (e.g. 1, 2, 3 or 4) anionic substituents (such as carboxylate, phosphonate, phosphate or, preferably sulphonate); Y.sup.A2 is a 1,3-phenylene moiety having one or more (e.g. 1, 2, 3 or 4) anionic substituents (such as carboxylate, phosphonate, phosphate or, preferably sulphonate); Y.sup.N1 is an anionic-substituent free (e.g. unsubstituted) 1,4-phenylene moiety; and Y.sup.N2 is an anionic-substituent free (e.g. unsubstituted) 1,3-phenylene moiety; E is an end-cap, A is C.sub.1-6alkyl (preferably ethylene substituted with C.sub.1-4 alkyl substituents); M is a suitable counterion; and x>0; with the proviso that at least one Y group is y.sup.A1 or Y.sup.A2 and wherein the end cap E comprises polyethylene glycol and/or polypropylene glycol units, with a C1-C6 alkyl or hydrogen termination.

E-[OC(O)YC(O)O-A].sub.x-OC(O)YC(O)OM(I)

E-[OC(O)YC(O)O-A].sub.x-OC(O)YC(O-E(II)

Claims

1. A laundry liquid composition, comprising an anionic soil release polymer and a surfactant wherein the anionic soil release polymer comprises a fabric-binding region capped by one or more hydrophilic regions, wherein the fabric-binding region includes one or more anionic substituents and at least one end block/cap based on at least one of polyethylene glycol or polypropylene glycol, with a lower alkyl or hydrogen termination, and wherein the anionic soil release polymer is one of: a compound having formula (I) or a compound having formula (II):
E-[C(O)YC(O)O-A].sub.x-OC(O)YC(O)OM(I)
E-[C(O)YC(O)O-A].sub.x-OC(O)YC(O)O-E(II) where each Y is independently selected from Y.sup.A1, Y.sup.A2, Y.sup.N1 and Y.sup.N2 wherein: Y.sup.A1 is a 1,4-phenylene moiety having one or more anionic substituents; Y.sup.A2 is a 1,3-phenylene moiety having one or more anionic substituents; Y.sup.N1 is an anionic-substituent free 1,4-phenylene moiety; and Y.sup.N2 is an anionic-substituent free 1,3-phenylene moiety; A is C.sub.1-6 alkyl; M is a suitable counterion; and x>0; with the proviso that at least one Y group is Y.sup.A1 or Y.sup.A2 and wherein E is an end-cap comprising at least one of polyethylene glycol or polypropylene glycol units, with a C1-C6 alkyl, hydrogen or sulphate termination.

2. The laundry liquid composition according to claim 1, wherein the surfactant comprises an anionic surfactant.

3. The laundry liquid detergent composition according to claim 1, wherein the anionic soil release polymer comprises 0.1 to 5 wt. % of the composition.

4. The laundry liquid detergent composition according to claim 3, wherein the anionic soil release polymer comprises 0.1 to 3 wt. % of the composition.

5. The laundry liquid detergent composition according to claim 1, wherein the composition consists of: (i) water; (ii) the anionic soil release polymer; (iii) the surfactant, wherein the surfactant is an anionic surfactant; and optionally at least one of: (iv) modified polyalkyleneimine (v) one or more enzymes; or (vi) one or more additives selected from the group consisting of builders, sequestrants, bleaches, perfume, foam boosting agents, preservatives, pH buffering agents, polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, anti-oxidants, sunscreens, anti-corrosion agents, drape imparting agents, anti-static agents, ironing aids, colorants, pearlisers, opacifiers, shading dye, fluorescent agents, dye transfer inhibition polymers, anti redeposition polymers, soil release polymers, and combinations thereof.

6. A laundry liquid composition according to claim 1, wherein the composition has a viscosity at 25 C. of greater than 200 mPa.Math.s.

7. A package containing the laundry liquid composition according to claim 1.

8. The laundry liquid composition of claim 1, wherein Y.sup.A1 is a 1,4-phenylene moiety having 1 to 4 anionic substituents.

9. The laundry liquid composition of claim 1, wherein the one or more anionic substituents of Y.sup.A1 is selected from the group consisting of carboxylate, phosphonate, phosphate, sulphonate, and combinations thereof.

10. The laundry liquid composition of claim 1, wherein Y.sup.A2 is a 1,3-phenylene moiety having 1 to 4 anionic substituents.

11. The laundry liquid composition of claim 1, wherein the one or more anionic substituents of Y.sup.A2 is selected from the group consisting of carboxylate, phosphonate, phosphate, sulphonate, and combinations thereof.

12. The laundry liquid composition of claim 1, wherein Y.sup.N1 is an unsubstituted 1,4-phenylene moiety.

13. The laundry liquid composition of claim 1, wherein Y.sup.N2 is an unsubstituted 1,3-phenylene moiety.

14. The laundry liquid composition of claim 1, wherein A is ethylene substituted with C.sub.1-4 alkyl substituents.

15. The laundry liquid composition of claim 5, wherein the preservatives include bactericides.

Description

EXAMPLES

[0087] Experiments were carried out to demonstrate the improved viscosity characteristics of compositions incorporating anionic SRPs.

Example 1

[0088] An anionic polyester soil release polymer (Texcare SRA-100N, Clariant) was dissolved in a liquid detergent base, to produce a composition according to Table 1:

TABLE-US-00001 TABLE 1 Liquid detergent compositions w/w % as 100% active NaCl 1.88 NaOH 0.218 Triethanolamine 0.667 Citric acid 0.178 LAS acid 2.0 Soil release polymer 0.5 SLES 3EO 6.0 Cocamidopropyl betaine 1.5 plus antifoam, fluorescer, to 100% fragrance, preservatives and demineralised water

Comparative Example 1

[0089] A sample was produced having an identical composition to that shown in Table 1 but with a non-ionic polyester SRP as described in WO 2014/019903 used in place of the anionic polyester SRP.

Results

[0090] The viscosity of the compositions of Example 1 and Comparative Example 1 were measured at a temperature of 25 C. and shear rate of 23 s.sup.1 using a Physica MCR300 rheometer (Anton Paar) operating with a cylinder geometry (geometry CC27profiled DIN concentric cylinder). The measurement was carried out using a three step process: (i) controlled stress steps from 0.01 to 400 Pa, terminating once a shear rate of 0.1 s.sup.1 is reached; (ii) controlled shear rate steps from 0.1 to 1200 s.sup.1 and (iii) controlled shear rate steps from 1200 to 0.1 s.sup.1. The results shown in Table 2 show that the non-ionic SRP produced a significant thinning effect on the composition, and that the anionic SRP had a significantly higher viscosity.

TABLE-US-00002 TABLE 2 Viscosity (mPa .Math. s) Example 1 1600 Comparative Example 1 159