EP1133937B1 - Device for storing and applying cosmetic or care products - Google Patents

Description

The present invention relates to the field of packaging devices and applying a cosmetic or care product.

The invention relates more particularly but not exclusively to a device for packaging and applying lipstick.

A large number of packaging devices have been proposed and application of lipstick.

For example, French patent applications may be referred to FR-A 2 548 880 and FR-A-2 762 763, as well as to the European patent application EP-A-0 815 766 from the applicant company.

US 5,984,554 discloses a packaging device and applying a product containing solvents volatile. This device comprises a hood provided internally with a polyethylene sealing piece basic density.

In general, it seeks to obtain a sealed closure of the case in the absence of use, in order to obtain a good conservation of the grapes and in particular avoid the evaporation of volatile hydrocarbon solvents contained in the product.

Internal tests have shown that the cases currently on the market offer a satisfactory seal, that is to say that no weight variation of the closed case after a prolonged storage period at a temperature above ambient temperature.

Despite this tightness, it has been found that for certain compositions the Grape preservation was not optimal and the quality of the make-up was affected.

The present invention aims in particular to improve the preservation of grapes.

More generally, the invention aims to improve the preservation of a product cosmetic or care product containing at least one volatile hydrocarbon solvent contained in a closed-loop packaging and application device comprising at least one two elements, one of which is made of plastic, these elements being suitable for being moved relatively to each other to allow application of the product.

The invention achieves this by virtue of the fact that the plastics material is non-polyolefinic in such a way that said element (s) does not undergo any mass variation sensitive when they are (are) in prolonged contact with the vapors of said solvent.

The applicant company found that, unexpectedly, the fact of realizing in one or more plastics the elements of the device exposed to vapors volatile hydrocarbon solvent (s) contained in the product could improve

 the preservation of the latter.

After having realized the invention and carried out comparative tests internally, the Applicant Company found that the preservation of the product could be improved by preventing even minimal absorption of solvent vapors by the components plastic material of the device.

The applicant company has also found that the present invention makes it possible when the device comprises a mechanism for driving the product as is the case case for example for a lipstick case, to avoid any risk of variation dimensional plastic components and malfunction of the mechanism after absorption of the volatile hydrocarbon solvent (s) contained in the if it is stored at a relatively high temperature and / or extended storage (several years). The drive mechanisms from red holster to lips have parts to be moved precisely by compared to others and are particularly sensitive to dimensional variations.

The invention is particularly advantageous when the solvent is selected from hydrocarbon oils of 8 to 16 carbon atoms or mixtures thereof, the solvent may be selected from branched C ₈ -C ₁₆ alkanes and mixtures thereof and may consist of isododecane.

It is used to make the plastic components of the device of non-polyolefinic plastics.

It is thus possible to use materials selected from the following list: styrenics, especially polystyrenes and their copolymers (SB, SAN, ABS), polyvinylchlorides and their derivatives, polyacrylics (PMMA), polyoxymethylenes (POM), polyamides (PA) and saturated polyesters thermoplastics, especially polyethylene terephthalate (PET).

In an exemplary embodiment, all the plastic components of the device are made of acrylobutadiene-styrene (ABS).

When the device comprises an outer covering, it uses advantageously to achieve this dressing of ABS or an ABS / SAN copolymer.

When the device comprises a drive mechanism comprising at least less two components moving relative to each other, it is advantageous to use to make these components of different materials, one of the components being realized in POM and another ABS component.

It is thus possible to improve the sliding and to avoid the emission of a noise of creak.

At least one of said plastic elements not undergoing Sensitive mass variation may belong to a product drive mechanism.

At least one of said plastic elements not undergoing significant mass variation may be not apparent from the outside of the device.

At least one of said plastic elements not undergoing Sensitive mass variation may be in direct contact with the product.

• la figure 1 est une vue schématique en coupe axiale d'un premier exemple d'étui de rouge à lèvres,
• la figure 2 est une vue schématique éclatée du mécanisme d'entraínement de l'étui de la figure 1,
• la figure 3 est une vue schématique, en coupe axiale, d'un deuxième exemple d'étui de rouge à lèvres, et
• la figure 4 est une vue schématique en coupe axiale d'un troisième exemple d'étui de rouge à lèvres.

Other characteristics and advantages of the present invention will emerge on reading the following detailed description of nonlimiting exemplary embodiments and on examining the appended drawing, in which:

• FIG. 1 is a diagrammatic view in axial section of a first example of a lipstick case,
• FIG. 2 is an exploded schematic view of the drive mechanism of the case of FIG. 1,
• FIG. 3 is a diagrammatic view, in axial section, of a second example of a lipstick case, and
• Figure 4 is a schematic axial sectional view of a third example of lipstick case.

FIGS. 1 and 2 show a case 1 conforming to a first example of implementation of the invention.

In this example, the case 1 comprises an outer covering comprising a body or base 2, a removable cover 3 and a drive mechanism 4 for allow the axial displacement of a product grape P.

Mechanism 4 has a structure known per se, and it consists of the assembly of three elements, namely a sheath 5, a grape cup 6 and a envelope 7.

The sheath 5 and the cup 6 are made of plastic and the envelope 7 has a metal sleeve 8 lined by an inner liner 9 of material plastic.

The cup 6 comprises, in a manner known per se, two lugs 10 diametrically opposed arranged to slide in two guide slots 11 diametrically opposed to the sheath 5.

The ends of the lugs 10 engage in helical grooves 12 of the inner liner 9, so that a rotational movement of the sheath 5 relative to the casing 7 is accompanied by an axial displacement of the cup 6.

The body 2 comprises a chimney 13 which engages in the sheath 5 and which is immobilized in rotation relative thereto.

To cause the output of the grape product P, the user turns the envelope 7 relative to the body 2 after removing the closure cap 3.

FIG. 1 only shows the upper end of the grape of product P for the sake of clarity of the drawing.

For further details regarding the structure of such a red case to lip, we can refer to the French patent application FR-A-2 248 880.

FIG. 3 shows a case 1 'of lipstick, with a structure known and described in the French patent application FR-A-2 762 763, to which can advantageously refer.

The case 1 'has an outer covering comprising a body or base 2' and a closure cap 3 ', the latter housing a drive mechanism 4' comprising a envelope 7 ', a sheath 5' and a grape cup 6 '.

The sheath 5 'is made in one piece before the body 2' and comprises two diametrically opposed slots 11 'in which can slide two lugs diametrically opposite 10 'of the cup 6'.

The envelope 7 'comprises an outer metal sleeve 8' lined with a inner liner 9 'provided with a helical thread 12'.

The operation is similar to that of the case 1.

There is shown in Figure 4 another case 1 ".

The structure of this case 1 "is described in the European patent application EP-A-0815666.

The case 1 "has an outer covering comprising a body or base 2" and a closure cap 3 ", the body 2" and the cover 3 "being for example made of metal.

The case 1 "comprises a drive mechanism 4" which comprises a set 5 "fixed plastic material relative to the body 2", an envelope 7 "can turn in relation to the latter and a 6 "grape cup.

The cup 6 "is integral with a threaded rod 20 made of plastic material in a nut element 21 belonging to the assembly 5 ".

The envelope 7 "comprises a metal sleeve 8", rotatable by relative to the body 2 "but fixed in translation, in which is engaged an insert 22 in plastic material.

The threaded rod 20 comprises along its length two flats diametrically opposite, not apparent in the drawing because parallel to the sectional plane of Figure 4.

The insert 22 has two drive surfaces, not shown on the 4, which come to bear on the flats of the rod 20, so that the rotational drive of the casing 7 "is accompanied by a rotational movement of the rod 20, the latter being however free to move axially relative to the insert 22, the threads of the rod 20 engaging in the element 21.

Thus, the rotation of the rod 20 is accompanied by an axial displacement of the cup 6 "in the 8" sleeve.

It should be noted that the closure cap 3 "comprises an insert 23 provided with godrons 24.

They come to engage on corresponding throats of the sleeve 8 ", when the hood 3" is in place, in order to obtain a tight closure.

In all the embodiments which have just been described and according to the invention, it is used to produce the plastic components materials chosen to avoid significant mass variation when placed in prolonged contact with the vapors of the volatile solvent (s) contained in the product P.

For the purposes of the present invention, a volatile solvent is understood to mean a medium non-aqueous liquid at room temperature (25 ° C) and at atmospheric pressure normal (760 mm mercury), which may evaporate from the skin or lips less than an hour.

Such a solvent may be chosen from media having a vapor pressure, at room temperature and normal atmospheric pressure, ranging from 10 ^-3 to 300 mm of mercury (0.13 Pa to 40 000 Pa).

In the embodiments described, the solvents considered are hydrocarbon oils comprising 8 to 16 carbon atoms or mixtures thereof.

Such oils may be selected from branched C ₈ -C ₁₆ alkanes and mixtures thereof.

For example, isoparaffins C ₈ -C ₁₄ , or isododecane, isohexadecane or neo-pentanoate isohexyl, isododecane being preferred.

As an example of a commercial reference of the latter compound, it is possible to mention Permethyl 99A from PRESPERSE INC.

The product P contains, in the described embodiments, between 5 and 90% volatile solvents, and preferably at least 20%.

The product P may have, for example, one of the following compositions:

Example 1

Isododecane (2,2,4,6,6) pentanethyl heptane 20% phenyltrimethicone 49% Polyethylene wax (PM 500) 20% Pigments and pearls 11%

the proportions given above being mass fractions.

This lipstick is obtained by dispersing the pigments and nacres in the phenyltrimethicone then adding the wax and heating at 100 ° C until melting total wax. Isododecane is then added at 80 ° C. The melted mixture is then poured into a suitable mold to form a stick and then cool to the temperature room. The resulting stick is homogeneous, soft and non-greasy. It provides a comfortable film on the lips throughout the day and who does not transfer.

Example 2

isododecane 20% polyisobutene 41% Polydimethylsiloxane (100 cst) 8% Polyethylene wax (PM 500) 20% Pigments and pearls 11%

This lipstick is obtained as in Example 1. We get a red to which is easily applied and after evaporation of the isododecane leads to a comfortable movie that does not transfer.

Example 3

isododecane 35% polyisobutene 18% Polydimethylsiloxane (100 cst) 8% Polyethylene wax (PM 500) 16.5% Pigments and pearls 11% Arachidyl propionate 7.5%

This lipstick is obtained as in Example 1 and presents the same properties.

Example 4

Phase A Hydrogenated polyisobutene 11% Diglyceryl disostearate sold under reference 4.86% Salacos 42 by the company NISSHIN OIL MILLS PVP / Eicosene copolymer 5% antioxidant qs Phase B Polyethylene wax (PM 400) 10% Phase C Titanium oxide 0.28% DC Red No. 7 1.03% FDC yellow # 6 A1 lake 2.19% Kaolin 7.50% Phase D Phenyltrimethicone (1000 cSt) 35% Phase E Mica 1% Phase F isododecane 22.08% 100% mass

Operating mode

The particulate phase C is ground in phase A using a grinder triple roll. The polyethylene wax is then added and the mixture is heated to 100.degree. complete dissolution of the wax. Phenyltrimethicone and mica are then added to 100 ° C, then isododecane at 80-90 ° C. It can then be run at 80-85 ° C in suitable molds to obtain sticks.

In all the described embodiments, the product P contains a not negligible proportion of isododecane and the components plastic cases 1, 1 'and 1 "in non-polyolefinic thermoplastics.

It is thus possible to use instead of polypropylene or high polyethylene density usually encountered for the manufacture of known lipstick cases, styrenics, for example polystyrenes (PS) and their copolymers (SB, SAN, ABS), polyvinyl chlorides and their derivatives, polyacrylics (PMMA), polyoxymethylenes (POM), polyamides (PA) and saturated polyesters thermoplastics, especially polyethylene terephthalate (PET).

Tests carried out by the applicant company have shown that such materials, exposed for a prolonged period of time to isododecane vapors, did not undergo no appreciable mass variation, unlike polyolefins such as polypropylene or high density polyethylene.

Tests were carried out using to form the sheath, the cup and the inner liner of cases 1 and 1 'of acrylonitrile polystyrene (SAN).

These tests showed that the mass variation after exposure prolonged to isododecane vapors, was less than 0.4%.

We also manufactured a 1 "case by realizing all its components in acrylobutadiene-styrene plastic (ABS) and the measurements made have not been allowed to observe a mass variation in the weight of the components after exposure extended to isododecane vapors.

The invention is generally applicable to all lipstick cases known.

For those whose exterior cladding is made of polypropylene or high density polyethylene, these materials will advantageously be replaced by ABS or an ABS / SAN copolymer.

With regard to the drive mechanism, it is advantageous to use different materials to get better motion characteristics, in particular better sliding and reduced operating noise.

We can thus, to realize one of the components of the mechanism a different material from that used to make the other components of the mechanism, one of the components being for example made of POM and the others ABS components.

The invention has shown that besides the best preservation of the product, dimensional stability of the plastic components was guaranteed the case over a long period of time, even when stored at a relatively high.

Comparative tests have found that mechanisms having polyolefin components were subject to dimensional variations likely to significantly alter the torque to be applied to axial displacement of the cup raisin door or, at the limit, leading to jamming of the mechanism.

The invention also makes it possible to avoid that following a loss of solvent the raisin dries up, such drying can lead to a narrowing of its diameter and a detachment of the cup that carries it; moreover, the drying of the grapes accompanied by a hardening which prevents a correct spreading of the product on the lips.

Of course, the invention is not limited to the embodiments which have just been given.

In particular, the invention is not limited to the case where the hydrocarbon solvent contained in the product is isododecane.

In addition, the invention is not limited to lipstick cases but generally applicable to all packaging and application devices in which a sealing is sought and in which plastic components exposed to the vapors of hydrocarbon solvents contained in the product.

Claims (12)

1. A packaging and applicator device (1, 1', 1") comprising a cosmetic or care product to be applied, said product containing at least one volatile hydrocarbon solvent, the device being hermetically closable and comprising at least two elements, at least one of which is made of a plastics material, said elements being suitable for being moved relative to each other to enable the substance to be applied, the device being
   characterized by the fact that all of the plastics material elements of the device exposed to the solvent vapors are made of non-polyolefin plastics materials, said elements being not subject to significant mass variation when put into prolonged contact with the vapor of said solvent.
2. A device according to the preceding claim,
   characterized by the fact that it constitutes a lipstick case.
3. A device according to either preceding claim,
   characterized by the fact that the solvent is selected from hydrocarbon oils having 8 to 16 carbon atoms, and mixtures thereof.
4. A device according to the preceding claim,
   characterized by the fact that said solvent is selected from C₈-C₁₆ branched alkanes and mixtures thereof.
5. A device according to the preceding claim,
   characterized by the fact that the solvent is isododecane.
6. A device according to the preceding claim,
   characterized by the fact that the plastics material components of the device are made of materials selected from the following list: styrene compounds, in particular polystyrenes and copolymers thereof (SB, SAN, ABS), polyvinyl chlorides and derivatives thereof, polyacrylics (PMMA), polyoxymethylenes (POM), polyamides (PA), and saturated thermoplastic polyesters, in particular polyethylene terephthalate (PET).
7. A device according to any preceding claim,
   characterized by the fact that all of the plastics material components of the device are made of acrylobutadiene-styrene (ABS).
8. A device according to any preceding claim,
   characterized by the fact that it includes an outer cover and by the fact that the cover is made of ABS or a copolymer of ABS and SAN.
9. A device according to any preceding claim,
   characterized by the fact that it includes a drive mechanism comprising at least two components that are movable relative to each other, and by the fact that these components are made of different materials, one of the components being made of POM and the other component of ABS.
10. A device according to any one of claims 1 to 9,
    characterized by the fact that at least one of said plastics material elements not subject to significant mass variation belongs to a drive mechanism for the substance.
11. A device according to any preceding claim,
    characterized by the fact that at least one of said plastics material elements not subject to significant mass variation is not visible from outside the device.
12. A device according to any preceding claim,
    characterized by the fact that at least one of said plastics material elements not subject to significant mass variation is in direct contact with the substance.

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