Fabric softening composition comprising a polymeric viscosity modifier
View Patent ↗A liquid fabric treatment composition comprising a cationic fabric softening agent and a water-soluble linear polymeric viscosity modifier represented by the formula: Z—Y—(X—Y) n —Z in which: X represents a polyether chain, each Y independently represents a linking group derived from a diisocyanate, each Z independently represents a hydrophobic group and optionally includes a spacer linked to Y, n represents an integer of at least 2, and the molecular weight of the polymer is from 2,000 to 80,000.
1. A liquid fabric treatment composition, comprising:
(a) a cationic fabric softening agent present in an amount of from 2 to 75%;
(b) a water-soluble linear polymeric viscosity modifier represented by the formula:
Z—Y—(X—Y) n —Z
in which:
X represents a polyether chain,
each Y independently represents a linking group derived from a diisocyanate,
each Z independently represents a hydrophobic group that is an aliphatic group having from 11 to 24 carbon atoms and optionally includes a spacer linked to Y, wherein said spacer is ethoxy, propoxy or ethylene glycoxy,
n represents an integer of at least 2, and
the molecular weight of the polymeric viscosity modifier is from 2,000 to 80,000;
(c) from 0.3 to 2% by weight of a fatty alcohol or fatty acid containing from 8 to 22 carbon atoms; and
(d) from 0.01 to 10% by weight of a nonionic surfactant.
2. The liquid fabric treatment composition according to claim 1 , wherein the molecular weight of the polymeric viscosity modifier is from 7,500 to 30,000.
3. The liquid fabric treatment composition according to claim 1 , in which each Z comprises an alkyl group.
4. The liquid fabric treatment composition according to claim 1 , in which each Z is derived from an α-hydroxyaliphatic group or an α-aminoaliphatic group of from 11 to 24 carbon atoms.
5. The liquid fabric treatment composition according to claim 1 , in which X is poly(oxyalkylene) group in which the alkylene groups contain from 2 to 6 carbon atoms.
6. The liquid fabric treatment composition according to claim 5 , in which X is polyoxyethylene.
7. The liquid fabric treatment composition according to claim 1 , in which Y is derived from an aliphatic, cycloaliphatic or aromatic diisocyanate.
8. The liquid fabric treatment composition according to claim 1 , in which the polymeric viscosity modifier is present in an amount of from 0.001 to 2% by weight of the composition.
9. The liquid fabric softening composition as claimed in claim 1 , wherein the fabric softening agent comprises a quaternary ammonium compound with ester linkages and is present in an amount of from 8 to 75% by weight of the composition.
10. The liquid fabric softening composition as claimed in claim 9 , in which the fabric softening agent comprises a tallow based triethanolamine ammonium compound.
11. The fabric softening composition as claimed in claim 1 , which further comprises a sucrose polyester oil.
12. A method for the treatment of fabrics comprising contacting fabrics with a liquid fabric treatment composition according to claim 1 .
13. The liquid aqueous fabric softening composition as claimed in claim 1 , in which Y represents a linking group derived from isophorone diisocyanate.
14. A liquid fabric treatment composition, comprising:
(a) a cationic fabric softening agent present in an amount of from 2 to 75%;
(b) a water-soluble linear polymeric viscosity modifier represented by the formula:
in which:
a represents an integer from 2 to 20,000,
b represents an integer from 0 to 30,
c represents an integer from 10 to 24, and
d represents an integer from 2 to 10;
(c) from 0.3 to 2% by weight of a fatty alcohol or fatty acid containing from 8 to 22 carbon atoms; and
(d) from 0.01 to 10% by weight of a nonionic surfactant.
15. A method for the treatment of fabrics comprising contacting fabrics with a liquid fabric treatment composition according to claim 14 .
16. The liquid fabric softening composition as claimed in claim 14 , wherein the fabric softening agent comprises a quaternary ammonium compound with ester linkages and is present in an amount of from 11 to 75% by weight of the composition.
17. The liquid fabric softening composition as claimed in claim 1 , wherein the fabric softening agent comprises a quaternary ammonium compound and is present in an amount of from 8 to 75% by weight of the composition.
18. The liquid fabric softening composition as claimed in claim 1 , wherein the fabric softening agent comprises a quaternary ammonium compound and is present in an amount of from 11 to 75% by weight of the composition.