Composition containing an opacifier or pearlescent agent and...

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice

Reexamination Certificate

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C424S070100, C424S070110, C424S070120, C424S070130, C424S070190, C424S070210, C424S070220, C424S070210, C424S070240, C424S070270, C424S070280, C424S070310

Reexamination Certificate

active

06521238

ABSTRACT:

The present invention relates to a composition comprising:
at least one surfactant base,
at least one linear, saturated, long-chain fatty alcohol, including, of course, a mixture of fatty alcohols, comprising at least 50% by weight relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms, and
at least one additional ingredient chosen from opacifiers and pearlescent agents; to the use of this composition as a pearlescent base, i.e. a pearling agent; and to a cosmetic composition comprising, in a cosmetically acceptable medium,
at least one surfactant base,
at least one linear, saturated, long-chain fatty alcohol comprising at least 50% by weight, relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms, and
at least one additional ingredient chosen from opacifiers and pearlescent agents, and
at least one conditioner for keratin substances.
The invention also relates to the use of the composition as an agent for suspending insoluble conditioners, such as conditioners that are insoluble in water.
It is well known that hair which has been sensitized (i.e. damaged and/or embrittled) to varying degrees under the action of atmospheric agents or under the action of mechanical or chemical treatments, such as dyeing, bleaching and/or permanent-waving operations, is often difficult to disentangle and to style, and lacks softness.
It has already been recommended to use conditioners, in particular insoluble conditioners, in compositions for washing or caring for keratin substances such as the hair in order to facilitate disentangling of the hair and to make it soft, shiny and supple.
Given the insoluble nature of certain conditioners such as, for example, silicones or oils, it is sought to keep the conditioners uniformly dispersed in the medium without, however, reducing the viscosity or the detergent or lathering properties of the compositions. The silicones should also be delivered onto the keratin substances to be treated so as to give them, after the application, properties of softness, sheen and disentanglement.
It is also known that products, in particular cosmetic products, which have an iridescent, shimmering or metallized appearance or effect are widely favored by consumers on account of their aesthetic appeal and the fact that they give the product an appearance of richness. The agents which provide this effect are pearling agents generally comprising crystals which remain dispersed in the compositions and which reflect light.
The term “pearling agent” means an agent which produces an iridescent, shimmering or metallized appearance or effect. In the present application, “pearlescent base” refers to a composition which can act as a pearling agent. Compositions according to the present invention can be used as a pearlescent base. A “pearlescent agent” is a compound or substance which can act as a pearling agent.
Few means are currently available for effectively keeping insoluble conditioners in suspension, since this is a difficult problem to solve; to this end, it has already been proposed to use long-chain ester derivatives or polysaccharides such as xanthan gum. However, long-chain ester derivatives can present crystallization problems which lead to a change in the viscosity of the compositions over time; gelling agents also have drawbacks, namely, on the one hand, it is difficult to develop a foam with detergent compositions containing xanthan gum (poor foam initiation), and, on the other hand, the compositions lack a smooth texture and they flow in blobs, which users do not appreciate.
Long-chain ether or thioether derivatives, such as those described in European patent application EP 457,688 and PCT application WO 98/03155, are also known. However, these agents opacify the compositions while giving them no or insufficient pearling effect.
It has already been attempted to improve the pearling effect by adding thickeners and/or other pearlescent agents, but, in this case, the viscosity becomes too large and/or the composition is no longer stable.
The inventors have discovered, and it is this which forms the subject of the invention, that the use of at least one linear, saturated, long-chain fatty alcohol, including of course, a mixture of such fatty alcohols, comprising at least 50% by weight relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms gives a pearling effect to and/or improves the pearling effect of compositions comprising at least one surfactant base and at least one additional ingredient chosen from opacifiers and pearlescent agents.
One subject of the invention is thus compositions comprising at least one surfactant base, at least one linear, saturated, long-chain fatty alcohol comprising at least 50% by weight relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms, and at least one additional ingredient chosen from opacifiers and pearlescent agents.
The compositions according to the invention can be used as a pearlescent base for cosmetic compositions, to give a pearling effect which is better than that obtained with only the opacifier and/or pearlescent agent.
Another subject of the invention is the use of at least one linear, saturated, long-chain fatty alcohol comprising at least 50% by weight relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms, and of an opacifier, as a pearlescent base.
The compositions can show very good homogeneity and good stability of the pearling agent, as well as a viscosity which is satisfactory for applying them to keratin substances.
Other subjects of the invention will become apparent on reading the description and the examples which follow.
The at least one linear, saturated, long-chain fatty alcohol or mixtures of such fatty alcohols comprising at least 50% by weight relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty alcohol containing 22 carbon atoms, more particularly comprises at least 70% by weight, relative to the total weight of the at least one linear, saturated, long-chain fatty alcohol, of at least one linear, saturated, long-chain fatty C
22
alcohol.
Generally, as in the case of the use of the commercial product, Nafol 1822 C from Condea, mentioned below, the at least one linear, saturated, long-chain fatty alcohol is present as a mixture of alcohols. The mixture can, for example, contain C
16
to C
24
fatty alcohols. Nafol 1822 C is referenced as behenyl alcohol in the Seventh Edition of the International Cosmetic Ingredient Dictionary, Volume 1, page 123 and is defined to be a mixture of fatty alcohols containing chiefly n-docosanol, a C
22
alcohol. In the mixtures of alcohols of the present invention, C
16
and C
24
fatty alcohols each generally represent less than 2% by weight, and the C
18
chains less than 10% by weight, relative to the total weight of the alcohol mixture. Of course, as defined above, with respect to the mixtures of alcohols, the C
22
alcohol is at least 50% of the mixture of alcohols.
Such fatty alcohols are, in particular, the products sold, as mentioned above, under the name Nafol 1822 C by the company Condea. Nafol 1822 C contains about 0.5% of C
16
, 4-6% of C
18
, 15-19% of C
20
, 74-78% of C
22
and about 1.5% of C
24
. Another representative mixture of fatty alcohols is the product sold under the name Nafol 2298 by the company Condea, which contains 98% C
22
alcohol.
The pearlescent agents and/or opacifiers which can be used according to the invention can preferably be ch

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