Oxidation dye composition comprising a polycondensate of ethylene oxide and of propylene oxide, and an unsaturated fatty alcohol

1. A dye composition comprising

at least one oxidation dye precursor;

at least one polycondensate of ethylene oxide and of propylene oxide of formula (A):

H—(O—CH 2 —CH 2 ) a —(O—CH(CH 3 )—CH 2 ) b —(O—CH 2 —CH 2 ) a′ —OH  (A)

wherein a and a′ range from 2 to 150 and b ranges from 1 to 100; and

at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation;

wherein the weight ratio of the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation to the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 0.1 to about 10.

2. The dye composition according to claim 1 , wherein the at least one oxidation dye precursor is at least one oxidation base chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, and the addition salts thereof, and optionally at least one coupler chosen from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers, heterocyclic couplers, and the addition salts thereof.

3. The dye composition according to claim 1 , wherein for the at least one polycondensate of ethylene oxide and of propylene oxide, a and a′ range from 10 to 130 and b ranges from 20 to 80.

4. The dye composition according to claim 1 , wherein for the at least one polycondensate of ethylene oxide and of propylene oxide, a and a′ range from 80 to 130 and b ranges from 40 to 80.

5. The dye composition according to claim 1 , wherein for the at least one polycondensate of ethylene oxide and of propylene oxide, a and a′ and are identical.

6. The dye composition according to claim 1 , wherein the amount of the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 0.1% to about 20% by weight, relative to the total weight of the composition.

7. The dye composition according to claim 1 , wherein the amount of the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 1% to about 5% by weight, relative to the total weight of the composition.

8. The composition according to claim 1 , wherein the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation is chosen from C 12 -C 22 alcohols comprising from 1 to 3 unsaturations.

9. The dye composition according to claim 1 , wherein the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation is chosen from oleyl alcohol, linoleyl alcohol, undecylenyl alcohol, palmitoleyl alcohol, linolenyl alcohol, arachidonly alcohol and erucyl alcohol.

10. The dye composition according to claim 1 , wherein the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation is oleyl alcohol.

11. The dye composition according to claim 1 , wherein the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation is present in an amount ranging from about 0.1% to about 15% by weight, relative to the total weight of the composition.

12. The dye composition according to claim 1 , wherein the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation is present in an amount ranging from about 1% to about 5% by weight, relative to the total weight of the composition.

13. The dye composition according to claim 1 , wherein the weight ratio of the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation to the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 0.5 to about 2.

14. The dye composition according to claim 1 , wherein the dye composition is liquid at about 25° C. and at atmospheric pressure.

15. The dye composition according to claim 1 , further comprising a total amount of ionic or nonionic surfactants of greater than about 8%.

16. The dye composition according to claim 1 , further comprising a total amount of ionic or nonionic surfactants of greater than about 10%.

17. The dye composition according to claim 1 , further comprising at least one oxidizing agent.

18. A process for dyeing hair, comprising:

(1) mixing:

(a) at least one oxidizing agent and

(b) a composition comprising:

(i) at least one oxidation dye precursor and

(ii) at least one polycondensate of ethylene oxide and of propylene oxide of formula (A):

H—(O—CH 2 —CH 2 ) a —(O—CH(CH 3 )—CH 2 ) b —(O—CH 2 —CH 2 ) a′ —OH  (A)

wherein a and a′ range from 2 to 150 and b ranges from 1 to 100, and

(iii) at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation;

wherein the weight ratio of the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation to the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 0.1 to about 10; and

(2) applying the resultant mixture to hair.

19. A two-compartment device comprising:

in a first compartment, a first composition comprising at least one oxidation dye precursor, at least one polycondensate of ethylene oxide and of propylene oxide of formula (A):

H—(O—CH 2 —CH 2 ) a —(O—CH(CH 3 )—CH 2 ) b —(O—CH 2 —CH 2 ) a′ —OH  (A)

wherein a and a′ range from 2 to 150 and b ranges from 1 to 100, and at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation;

wherein the weight ratio of the at least one C 8 -C 30 fatty alcohol comprising at least one unsaturation to the at least one polycondensate of ethylene oxide and of propylene oxide ranges from about 0.1 to about 10; and

in a second compartment, a second composition comprising at least one oxidizing agent.