Method for improving the sensorial properties of oil-in-water emulsions
Disclosed is a method for improving the sensorial and/or aesthetic properties of an oil-in-water type emulsion for topical application, the method including an effective quantity of a mixture of saturated cyclic or acyclic, linear or branched hydrocarbons of which at least 95% by weight have between fifteen and nineteen carbon atoms.
1. A method for improving the spreading properties of an oil-in-water emulsion for topical use,
wherein said oil-in-water emulsion comprises for 100% of its weight:
from 95% to 50% wt % of a cosmetically acceptable aqueous phase;
from 5% to 50% wt % of a fatty phase, said fatty phase comprising, for 100% of the weight of said fatty phase, from 1% to 12% wt % of at least one oil-in-water surfactant and from 88% to 99% wt % of at least one oil and/or one wax,
the method comprising adding into said oil-in-water emulsion from 1% to 25% wt % of said oil-in-water emulsion of a mixture of saturated hydrocarbons that are cyclic or acyclic, linear or branched,
wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight,
either:
80-100 wt % of branched alkanes,
0-15 wt % of linear alkanes, and
0-5 wt % of cycloalkanes, and
wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms and up to 5% by weight of said cyclic or acyclic, linear or saturated branched hydrocarbons comprise less than fifteen or more than nineteen carbon atoms,
or:
40-100 wt % of branched alkanes,
0-20 wt % of linear alkanes, and
0-40 by weight of cycloalkanes and
wherein 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms,
wherein said oil-in-water emulsion is free of shea butter,
wherein said oil-in-water emulsion is free of silicone oil and silicone derivatives, and
wherein said oil-in-water emulsion further comprises at least one terpolymer selected from the group consisting of
terpolymers of acrylic or methacrylic acid in combination with 2-methyl-[(1-oxo-2-propenyl)aminol-1-propanesulfonic acid (AMPS) and N,N-dimethylacrylamide,
terpolymers of acrylic or methacrylic acid in combination with AMPS, and acrylamide, and
linear, branched, or crosslinked terpolymers with one monomer having a free partially salified or totally salified strong acid function, in combination with
one neutral monomer, and one monomer of formula: CH 2 ═C(R′ 3 )—C(═O)—[CH 2 —CH 2 —O] n —R′ 4 wherein R′ 3 represents a hydrogen atom or a methyl radical, R′ 4 represents a linear or branched alkyl radical comprising from eight to thirty carbon atoms, and n represents a number that is greater or equal to one and less or equal to 50.
2. The method as defined in claim 1 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
50-100 wt % of branched alkanes,
0-15 wt % of linear alkanes, and
0-35 wt % of cycloalkanes, and
wherein 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms.
3. The method as defined in claim 1 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
90-100 wt % of branched alkanes,
0-10 wt % of linear alkanes, and
0-1 wt % of cycloalkanes, and
wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms and up to 5% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise less than fifteen or more than nineteen carbon atoms.
4. The method as defined in claim 2 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
13.2 wt % of linear alkanes,
55.0 wt % of isoalkanes, and
31.8 wt % of cycloalkanes.
5. The method as defined in claim 3 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
3.7 wt % of linear alkanes comprising from fifteen to nineteen carbon atoms,
96 wt % of isoalkanes comprising from fifteen to nineteen carbon atoms, and
0.3 wt % of cycloalkanes comprising from fifteen to nineteen carbon atoms.
6. The method according to claim 1 , wherein said oil-in-water emulsion comprises, for 100% of its weight:
from 90% to 70% wt % of a cosmetically acceptable aqueous phase;
from 10% to 30% wt % of a fatty phase, said fatty phase comprising, for 100% of the weight of said fatty phase, from 2% to 8% wt % of at least one oil-in-water surfactant and from 92% to 98% wt % of at least one oil and/or one wax.
7. The method as defined in claim 6 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
a weight proportion of branched alkanes of greater than or equal to 50% and less than or equal to 100%,
a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 15%,
a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 35%,
and
wherein 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms.
8. The method as defined in claim 6 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
a weight proportion of branched alkanes of greater than or equal to 90% and less than or equal to 100%,
a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 10%,
a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 1%,
and
wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched saturated hydrocarbons comprise from fifteen to nineteen carbon atoms and up to 5% by weight of said cyclic or acyclic, linear or saturated branched hydrocarbons comprise less than fifteen or more than nineteen carbon atoms.
9. The method as defined in claim 7 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
13.2 wt % of linear alkanes,
55.0 wt % of isoalkanes, and
31.8 wt % of cycloalkanes.
10. The method as defined in claim 8 , wherein said mixture of saturated hydrocarbons comprises, for 100% of its weight:
3.7 wt % of linear alkanes comprising from fifteen to nineteen carbon atoms,
96 wt % of isoalkanes comprising from fifteen to nineteen carbon atoms, and
0.3 wt % of cycloalkanes comprising from fifteen to nineteen carbon atoms.