Compressed hairspray

Abstract

a) a pressurized container comprising i) a container wall surrounding a reservoir for storing a hair styling formulation, and ii) a propellant; b) a hair styling formulation comprising (iii) 20% to 75% by weight of alcohol, based on the total weight of the hair styling formulation and the propellant, and (iv) 1.0% to 15% by weight of a hair styling polymer, based on the total weight of the hair styling formulation and the propellant; and c) a spray device attached to the container for dispensing the hair styling formulation from the reservoir of the container, the spray device comprising a valve and an actuator, the valve comprising a valve body, the valve body comprising a stem and spring means; the valve having a diameter of 0. An aerosol hairspray product comprising: a restrictor tailpiece (RTP) of 1 mm to 2.5 mm; and a vapor phase tap (VPT) of 0.1 mm to 1.5 mm in diameter; an actuator having a main spray channel and communicating with an insert having an outlet orifice and 1 to 8 secondary spray channels; the channels being arranged tangentially around the outlet orifice; the outlet orifice being capable of liquid communication with the hair styling formulation in the reservoir; the outlet orifice having a diameter of 0.01 to 2 mm; and an orifice thickness of 0.1 to 1.5 mm; and the secondary spray channels having a height of 0.1 to 0.8 mm and a length of 0.1 to 0.5 mm.

Description

[Technical field]

[0001] The present invention relates to a "pressurized" aerosol hairspray product provided in a canister that provides the same number of uses as a non-pressurized product, but with a reduced amount of hair styling composition. [Background technology]

[0002] Hair styling products such as hairsprays are used to achieve various hairstyles and hold hair in place for a period of time. Typically, hairsprays contain film-forming polymers that form fiber-to-fiber bonds when applied to keratin-containing fibers, such as human hair. These bonds "glue" the fibers together and therefore provide hold to the hairstyle.

[0003] Aerosol hairspray products usually comprise a pressure-resistant container, a nozzle, a propellant, and a hair styling formulation. The hairspray composition is usually released from such products through an aerosol-forming nozzle. See, for example, US 2009 / 0104138.

[0004] Environmental sustainability has become an issue of increasing concern in aerosol applications, and concentrates have the potential to benefit both manufacturers and the environment. Aerosol concentrates offer cost advantages to manufacturers in terms of reduced packaging (both primary and secondary), reduced propellant use, reduced shipping costs, etc. Compared to traditional aerosols, the environment benefits from a product that emits less propellant (e.g., volatile organic compounds (VOCs)), generates less packaging waste, and has a reduced carbon footprint from manufacture to disposal.

[0005] It is therefore desirable to reduce the size and volume of pressurized products, such as hairsprays, which allow for a reduction in the amount of hairspray composition per consumer application without affecting performance, thereby maintaining the same number of consumer applications per can.

[0006] British Patent No. 2,299,507 (Unilever) discloses a low flow rate propellant-driven antiperspirant composition containing less than 60% by weight propellant and an initial spray rate of 0.5 g / sec or less.

[0007] European Patent No. 674,899 (Unilever) discloses a concentrated deodorant composition, most preferably comprising 30-60% propellant by weight of the composition, and having a discharge valve adapted to enable the composition to be sprayed at an initial spray rate of less than 0.3 g / sec.

[0008] US 2015 / 0004200 (The Procter & Gamble Company) discloses an aerosol hairspray product having a pressurized container containing an aqueous, substantially alcohol-free hair styling formulation. The spray device is attached to the container for dispensing the hair styling formulation and includes a valve and a nozzle, the valve including a valve body, a stem, and a spring means. The valve body houses an insert having an insert orifice and at least two channels tangentially arranged around the insert orifice. The valve body also includes at least two steam taps, and the insert orifice can be in liquid communication with the hair styling formulation in the reservoir.

[0009] Changing consumer habits and perceptions can be very difficult. If a product does not fit traditional spray habits, it can be difficult for the product to be accepted by consumers, no matter how good it is. Conversely, a product that fits consumer behavior but does not meet efficacy and sensory requirements is unlikely to be commercially accepted. When providing an aerosol product in concentrated form, it is necessary to refer to the way aerosols are traditionally used. The typical spray duration of a hairspray product refers to the time during which the actuator is actively engaged to dispense the product, which is typically around 5 seconds.

[0010] Producing an acceptable aerosol concentrate requires more than simply changing the activity level, since consumers are likely to stick to their traditional application habits regardless of the activity level. Minimizing the spray rate is another approach for concentrates. Typical spray rates for hairspray aerosols are on the order of 0.5 g / sec to 1.5 g / sec, but lower rates may not be desirable for concentrated aerosols. Minimizing the spray rate theoretically requires little or no disruption to consumer behavior, since the same dose can be applied in roughly the same amount of time, even though the aerosol is more concentrated. However, reducing the spray rate presents many problems for product engineers. As a practical matter, reducing the spray rate can exacerbate nozzle clogging and increase splashback. Furthermore, reducing the spray rate presents challenges with respect to providing a composition that provides acceptable sensory properties, given the consumer's application habits and the limitations of a typical application spray duration. A reduction in the spray rate can also result in reduced product efficacy if insufficient active is dispensed. Therefore, compression not only requires a reduction in spray rate, but also requires formulation changes to ensure that the compressed product is acceptable to the consumer.

[0011] One way to achieve compression of a spray product is to reduce the spray rate. When the spray rate is reduced, the concentration of resin in the formulation must double to compensate. However, doubling the resin in the formulation can create significant stability challenges due to too much solids. Additionally, clogging issues can occur in the orifices of valves, inserts, and actuators. All of this negatively impacts the performance and integrity of the product.

[0012] There remains a need for concentrated aerosol hairspray products that provide a combination of desirable sensory and dispensing properties without sacrificing product effectiveness, which allows the amount of hairspray composition per consumer application to be reduced without affecting performance, thereby maintaining the same number of consumer applications per can. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] US Patent No. 2009 / 0104138 [Patent Document 2] British Patent No. 2,299,507 [Patent Document 3] European Patent No. 674,899 [Patent Document 4] US Patent No. 2015 / 0004200 Summary of the Invention [Problem to be solved by the invention]

[0014] The inventors have found that a specially developed valve, in combination with an optimized insert, can control the spray rate to achieve compression to achieve the correct spray characteristics of the hair styling formulation. Surprisingly, there is no need to double the resin concentration. [Means for solving the problem]

[0015] In a first aspect of the present invention, a) i) a container wall surrounding a reservoir for storing a hair styling formulation; and ii) Propellants a pressurized vessel comprising: b) (iii) 20% to 75% by weight of alcohol, based on the total weight of the hair styling formulation and propellant; and (iv) 1.0% to 15% by weight of a hair styling polymer, based on the total weight of the hair styling formulation and propellant. a hair styling formulation comprising: c) a spray device attached to the container for dispensing a hair styling composition from a reservoir of the container, the spray device comprising a valve and an actuator; 1. An aerosol hairspray product comprising: the valve comprises a valve body, said valve body comprising a stem and a spring means; the valve comprising a restrictive tailpiece (RTP) having a diameter of 0.1 mm to 2.5 mm, and a vapor phase tap (VPT) having a diameter of 0.1 mm to 1.5 mm; an actuator having a primary atomizing channel and communicating with an insert having an exit orifice and 1 to 8 secondary atomizing channels, the channels being tangentially disposed about the exit orifice; the outlet orifice being in fluid communication with the hair styling formulation in the reservoir; The outlet orifice has a diameter of 0.01 to 2 mm; and an orifice thickness of 0.1 to 1.5 mm; An aerosol hairspray product is provided, in which the secondary spray channels have a height of 0.1 to 0.8 mm and a length of 0.1 to 0.5 mm.

[0016] In a second aspect of the present invention, there is provided a method of treating hair with a hairspray product of an aspect of the present invention comprising the step of applying to the hair a hair styling formulation defined in the first aspect of the present invention using a hairspray product of the first aspect of the present invention.

[0017] Embodiments of the present invention will now be described with reference to the following non-limiting drawings. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view of a hairspray product according to the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of a spray device (4) used in the hairspray product of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view of a valve (5) used in a hairspray product of the present invention, the valve being installed within a container (seated in a valve cup (16)). [Figure 4(a)] FIG. 2 is a cross-sectional view of an insert (6) used in the hairspray product of the present invention. [Figure 4(b)] FIG. 2 is a cross-sectional view of an insert (6) for use in a hairspray of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] FIG. 1 is a perspective view of a hairspray product comprising a pressurized container (1) having a container wall (2) and a reservoir (3), in which an atomizing device (4) comprises an actuator (5) having an insert (6) with an outlet orifice (7).

[0020] 2 is a cross-sectional view of an atomizing device (4) comprising an actuator (5) having an insert (6) with a main atomizing channel (8) and an exit orifice (7). The stem socket is also shown.

[0021] 3 is a cross-sectional view of a valve (10) for use in a hairspray product of the present invention, the valve being installed in a container and seated in a valve cup (16). The valve (10) comprises a valve body (11) which comprises a stem (12) and a spring means (13); the valve has a restrictor tailpiece (RTP) (14) having a diameter indicated by double-ended arrow "A" and a vapor phase tap (VPT) (15). The valve cup (16) comprises an outer gasket (17) and an inner gasket (18).

[0022] Figure 4a is a cross-sectional view of an insert (6) containing an exit orifice (7) and four secondary spray channels (19), said channels being arranged tangentially around the exit orifice (7). The double-headed arrow "X" indicates the length of the secondary spray channels as defined in claim 1.

[0023] 4b is a cross-sectional view of the insert (6) showing the exit orifice (7). The double-headed arrow "XX" indicates the orifice thickness as claimed in claim 1.

[0024] Aerosol hairspray products The present product relates to an aerosol hairspray product comprising a container containing a reservoir for a hair styling formulation and a liquefied gas propellant, and an atomizing device attached to the container.

[0025] In at least one embodiment, the product comprises from 50% to 65% hair styling formulation, or from 55% to 60% hair styling formulation, based on the total weight of the hair styling formulation and propellant.

[0026] In at least one embodiment, the product comprises from 35% to 50% propellant, or from 40% to 45% propellant, based on the total weight of the hair styling formulation and propellant.

[0027] As used herein, unless otherwise stated, the details of the hair styling formulation refer to the formulation prior to any degree of mixing with the propellant as soon as it is placed in the container, since the propellant is a liquefied gas propellant, and the same applies when details of the propellant are given, unless otherwise stated.

[0028] This product is an aerosol hairspray product and therefore does not include a mousse product or any pump spray product.

[0029] Conventional spray rates are typically in the range of 0.5-1.5 g / sec. The products of the present invention are delivered at a spray rate of 80-20%, preferably 70-30%, and most preferably 60-40% of this range. This reduction in spray rate without compromising performance is one of the advantages of the present invention. Thus, aerosol hairspray products are sprayed at a delivery rate of 80-20%, preferably 70-30%, and most preferably 60-40% of 0.5-1.5 g / sec.

[0030] Pressurized vessel The pressurized container comprises a container wall surrounding a reservoir for storing the hair styling formulation and a propellant.

[0031] The vessel walls may be primarily straight, curved, or tapered.

[0032] The container can be any size, but is preferably a "compressed" or travel size.

[0033] The container preferably has a volume (so-called overfill capacity) of 200 to 300 ml, more preferably 220 to 280 ml, and most preferably 230 to 260 ml.

[0034] The container preferably has a diameter of 35 to 50 mm, more preferably 40 to 45 mm.

[0035] The container preferably has a height of 80 to 220 mm, more preferably 90 to 180 mm, and most preferably 110 to 150 mm.

[0036] Propellant The hairspray composition further comprises a propellant. Preferred propellants are selected from hydrofluorocarbons (e.g., hydrofluorocarbon 152A), dimethyl ether, hydrocarbons such as propane, isobutane, butane, and mixtures thereof, and compressed gases such as nitrogen and carbon dioxide, and mixtures thereof.

[0037] Hair Styling Formulations The product comprises a hair styling formulation comprising a hair styling polymer and a neutralizing agent in an alcoholic composition. It is well known in the art that water-based compositions can result in negative consumer performance issues such as curl droop, long drying times, and stickiness to hair. These negatives have not been experienced with alcoholic compositions.

[0038] Hair Styling Polymers The hair styling polymer is present in an amount of from 1.0 to 10%, preferably from 1.0 to 8.0%, and most preferably from 2 to 7% by weight, based on the total weight of the hair styling formulation and propellant.

[0039] Hair styling polymers include VA / crotonate / vinyl neodecanoate copolymers, polyurethane-14 (and) AMP-acrylate copolymers (e.g., DynamX available from AzkoNoble), butyl ester of PVM / MA copolymers (e.g., Gantrez available from Ashland), polyester-5, octylacrylamide / acrylates / butylaminoethyl methacrylate copolymers, imidized isobutylene / maleic anhydride copolymers (e.g., Aquaflex™ FX-64 available from Ashland), polyvinylpyrrolidone, acrylates / hydroxyester acrylate copolymers (e.g., Acudyne 180 available from DOW), polyurethane-6, acrylates / octylacrylamide copolymers and acrylates copolymers (e.g., Balance available from AkzoNoble). Luvimer 100P available from CR and BASF), more preferably VA / crotonate / vinyl neodecanoate copolymer (e.g. Resyn 28-2930 available from AkzoNoble), and octylacrylamide / acrylates / butylaminoethyl methacrylate copolymer (e.g. Amphomer available from AkzoNoble).

[0040] Preferably, the styling resin comprises a VA / crotonate / vinyl neodecanoate copolymer (eg, Resyn 28-2930 available from AkzoNoble) and an octylacrylamide / acrylates / butylaminoethyl methacrylate copolymer (eg, Amphomer available from AkzoNoble).

[0041] Neutralizer The neutralizing agent provides an alkaline base and is preferably selected from potassium hydroxide, sodium hydroxide, triisopropanolamine, 2-aminobutanol, 2-aminomethylpropanol, aminoethylpropanediol, dimethylstearamine, sodium silicate, tetrahydroxypropylethylenediamine, ammonia, triethanolamine, trimethylamine, aminomethylpropanediol, more preferably 2-aminomethylpropanol, dimethylstearamine and 2-aminobutanol, and mixtures thereof.

[0042] alcohol The alcohol is preferably selected from ethanol, isopropyl alcohol, butanol, most preferably ethanol.

[0043] The alcohol is present in an amount of from 30% to 75% by weight based on the total weight of the hair styling formulation and propellant, preferably from 35% to 70% by weight, more preferably from 35% to 60% by weight, and most preferably from 35% to 55% by weight based on the total weight of the hair styling formulation and propellant.

[0044] Virtually water free The hair styling formulation is preferably substantially free of water. The hair styling formulation preferably comprises less than 2% by weight of water, based on the total weight of the hair styling formulation and propellant. In at least one embodiment, the hair styling formulation comprises 0.001 to 1.8% by weight of water, or 0.001 to 1.5% by weight, or 0.001 to 1% by weight of water, based on the total weight of the hair styling formulation and propellant. Most preferably, the formulation is anhydrous.

[0045] Additional Ingredients The formulation may also contain other adjuvants commonly used in hairsprays, preferably fragrances, silicones (e.g., phenyl trimethicone, cyclopentyl siloxane, PEG / PPG-20 / 15 dimethicone), emollients, corrosion inhibitors, emollients, UV absorbers (e.g., benzophenone-4, ethylhexyl methoxycinnamate), and mixtures thereof.

[0046] spray device Attached to the container is a spray device for spraying the hair styling formulation onto the substrate.

[0047] valve The spray device includes a valve.

[0048] The valve comprises a valve body, said valve body comprising a stem and a spring means.

[0049] The valve is equipped with a restrictive tailpiece (RTP) with a diameter of 0.1 mm to 2.5 mm, preferably 0.2 to 1.5 mm, and most preferably 0.3 to 1.0 mm.

[0050] The valve is equipped with a vapor phase tap (VPT) with a diameter of 0.1 mm to 1.5 mm, preferably 0.2 to 1.0 mm, and most preferably 0.3 to 0.8 mm.

[0051] When installed in a container, the valve preferably seats in a valve cup (16). The valve cup (16) preferably includes an outer gasket (17) that allows connection to the can by crimping onto the can bead, and an inner gasket (18). When the actuator is pressed, the inner gasket controls the dispensed product.

[0052] Actuator The spray device includes an actuator, which is typically located on the stem.

[0053] The actuator includes a main atomizing channel and communicates with the insert.

[0054] insert The insert comprises an exit orifice and 1 to 8 secondary spray channels, preferably 4 to 6 secondary spray channels, most preferably 6 secondary spray channels, said channels being arranged tangentially around the exit orifice.

[0055] Suitable inserts are available, for example, from Coster.

[0056] The insert controls the cone angle. A wide cone angle is preferred while maintaining the desired particle size distribution.

[0057] channel The secondary spray channel has a height of 0.1 to 0.8, preferably 0.3 to 0.7 mm, and a length of 0.1 to 0.5, preferably 0.25 to 0.35 mm.

[0058] Exit Orifice The exit orifice can be in fluid communication with the hair styling formulation in the reservoir.

[0059] The exit orifice has a diameter of 0.01 to 2 mm, most preferably 0.5 mm; and an orifice thickness of 0.1 to 1.5 mm, preferably 0.3 to 1.0 mm; The orifice may be straight or conical.

[0060] [Example] The following hairsprays were prepared: Hairspray 1 according to the invention.

[0061] Hairspray A is the comparison hairspray.

[0062] Details of the hair styling formulation and spray device characteristics are shown in Table 1 below.

[0063] The performance of Hairsprays 1 and A was evaluated using a standard half-head mannequin test protocol. A mannequin head (having hair up to 12 cm in length) was first prepared using a lightweight shampoo and conditioner and blow-dried into a straight, smooth style. The hairspray was gently shaken before each use.

[0064] Comparative Hairspray A was sprayed evenly onto the hair on one side of the mannequin's head from a distance of 30 cm for 10 seconds. This was repeated on the other side of the mannequin's head using Hairspray 1 according to the invention. A see-through divider was placed under the center of the mannequin to ensure there was no cross contamination during hairspray application.

[0065] The performance attributes of hold, flexibility, and softness were rated by expert graders using a half-unit 1- to 9-point scale for each attribute (higher scores being more desirable).

[0066] Hold was defined as how well the hair held the style after spraying, as assessed by touch by expert graders.

[0067] Softness was assessed by expert graders using their hands to scrunch the hair in their palms while assessing the feel of softness.

[0068] Softness was defined as the ability of hair to move and bend without disrupting the style and was assessed by gently shaking the head from side to side three times, and an expert grader visually assessed both movement and hold.

[0069] The results are shown in Table 1 below. [Table 1]

[0070] The results clearly show that Inventive Example 1 achieves the same performance as Comparative Example A at a 50% lower spray rate.

Claims

1. a) i) a container wall surrounding a reservoir for storing a hair styling formulation; and ii) Propellant a pressurized vessel comprising: b) (iii) 35% to 55% ethanol by weight based on the total weight of the hair styling formulation and propellant; and (iv) from 2% to 7% by weight of a hair styling polymer, based on the total weight of the hair styling formulation and propellant. a hair styling formulation comprising: c) a spray device attached to the container for dispensing the hair styling formulation from the reservoir of the container, the spray device comprising a valve and an actuator; Equipped with said valve comprising a valve body, said valve body comprising a stem and a spring means; said valve comprising a restrictive tailpiece (RTP) having a diameter of 0.2 mm to 1.5 mm, and a vapor phase tap (VPT) having a diameter of 0.2 mm to 1.0 mm, said diameter of said restrictive tailpiece (RTP) being greater than said diameter of said vapor phase tap (VPT); The actuator includes a primary atomizing channel and communicates with an insert including an exit orifice and six secondary atomizing channels; the channels are tangentially disposed about the exit orifice; the exit orifice is capable of fluid communication with the hair styling formulation within the reservoir; the exit orifice having a diameter of 0.01 to 2 mm; and an orifice thickness of 0.1 to 1.5 mm; An aerosol hairspray product, wherein the secondary atomizing channels have a height of 0.1 to 0.8 mm and a length of 0.1 to 0.5 mm.

2. 10. The aerosol hair spray product of claim 1 comprising less than 2% by weight of water, based on the total weight of the hair styling formulation and propellant.

3. 3. The aerosol hairspray product of claim 1 or 2, wherein the formulation is anhydrous.

4. 4. An aerosol hairspray product according to any one of claims 1 to 3, wherein the styling polymer is selected from VA / crotonate / vinyl neodecanoate copolymer, polyurethane-14 (and) AMP-acrylate copolymer, butyl ester of PVM / MA copolymer, polyester-5, octylacrylamide / acrylates / butylaminoethyl methacrylate copolymer, acrylates / hydroxyester acrylate copolymer, polyurethane-6, acrylates / octylacrylamide copolymer and acrylates copolymer.

5. The aerosol hairspray product of any one of claims 1 to 4, wherein the formulation comprises an alkaline base.

6. The aerosol hairspray product according to any one of claims 1 to 5, wherein the container has a volume of 200 to 300 ml.

7. The aerosol hairspray product according to any one of the preceding claims, wherein the secondary atomizing channels have a height of 0.3 to 0.7 mm.

8. The aerosol hairspray product according to any one of the preceding claims, wherein the secondary atomizing channels have a length of 0.25 to 0.35 mm.

9. The aerosol hairspray product of any one of claims 1 to 8, wherein the exit orifice has an orifice thickness of 0.1 to 1.5 mm.

10. A method of treating hair with a hairspray product according to any one of claims 1 to 9, comprising the step of applying to the hair a hair styling formulation according to any one of claims 1 to 5 using a hairspray product according to any one of claims 1 to 9.

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