CLIAMS:1. A non alcoholic, non-aqueous temporary hair dye spray composition comprising
a) 10 to 18.4 % by weight of atleast one volatile silicone;
b) 0.8 to 1.5 % by weight of hydrophobic fumed silica;
c) 0.8 to 1.5 % by weight of at least one oil soluble coloring agent; and
d) propellant selected from the group consisting of ethane, methane, propane, butane, isobutene, pentane, carbon dioxide, nitrogen and mixtures thereof;
wherein weight ratio of said hydrophobic fumed silica to said oil soluble coloring agent is from about 1: 1 to about 1:1.25; and
wherein the weight of said propellant in the temporary hair dye composition is 80% of the total weight of the composition.

2. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 1 wherein said volatile silicone is selected from the group consisting of phenyltrimethicone, dimethicone, trisiloxane, cyclohexasiloxane, disiloxane, volatile methyl siloxane, cyclopentasiloxane, cyclotetrasiloxane, polydimethylsiloxane, cyclotetrasiloxane, cyclopentasiloxane.

3. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 1 wherein said propellant is selected from the group consisting of ethane, methane, propane, butane, isobutene, pentane, carbon dioxide, nitrogen and mixture thereof.

4. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 1 wherein said oil soluble colouring agent is selected from the group consisting of D&C Green #6, D&C Violet #2, D&C Red #17, D&C Yellow #10 and D&C Yellow #11, CI 12100, CI 12140, CI 12700, CI 12740, CI 26100, CI 26105, CI 45396, CI 45410, CI 45425, CI 47000, CI 60725, CI 60724, CI 61520, CI 61565, CI 40800, CI75810, CI75120 and CI12150, Azo dyes, Nitro Dyes, natural dyes such as carotenoids including astaxanthin, lutein, violaxanthin and neoxanthine cryptoxanthin, canthaxanthin, zeaxanthin, citranaxanthin, beta-carotene, beta-4'-carotenal, beta-8'- carotenal, beta-12'-carotenal, beta-8'-carotenoic acid, lycopene, torularodin aldehyde, torularodin ethyl ester, neurosporaxanthin ethyl ester, zetacarotene, dehydroplectania- xanthin and the like, combinations and mixtures thereof.

5. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 1 wherein said temporary hair dye composition further comprises cosmetically acceptable excipients selected from at least one filler, at least one carrier, at least one moisturizer, at least one essential oil, at least one perfume and combination thereof.

6. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 5, wherein said filler or carrier is selected from a group comprising corn starch, wheat starch, maize starch, fumed silica, talc, clays, Kaolin, manganese containing clays, mica, silica, polyamide powder, poly-beta-alanine powder and polyethylene powder, tetrafluoroethylene polymer, lauroyllysine, starch, boron nitride, elastomeric polyorganosiloxane particles, precipitated calcium carbonate, magnesium carbonate, magnesium hydrocarbonate, hydroxyapatite, zinc stearate, magnesium stearate, lithium stearate, zinc laurate and magnesium myristate.

7. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 5, wherein said mositurizers and emollients is selected from group comprising silicone oils and modifications thereof selected from linear and cyclic polydimethylsiloxanes; amino, alkyl, alkylaryl, and aryl silicone oils (DC fluid Range); fats and oils including natural fats and oils such as jojoba, soybean, sunflower, rice bran, avocado, almond, olive, sesame, persic, castor, coconut, mink oils; cacao fat; beef tallow, lard; hardened oils obtained by hydrogenating the aforementioned oils; and synthetic mono, di and triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride; waxes such as carnauba, spermaceti, beeswax, lanolin, and derivatives thereof; hydrophobic plant extracts; hydrocarbons such as liquid paraffin, petrolatum, microcrystalline wax, ceresin, squalene, pristan and mineral oil; higher fatty acids such as lauric, myristic, palmitic, stearic, behenic, oleic, linoleic, linolenic, lanolic, isostearic, arachidonic and poly unsaturated fatty acids (PUFA);Polyols such as glycerin, glycol and derivatives, higher alcohols such as lauryl, cetyl, stearyl, oleyl, behenyl, cholesterol and 2-hexydecanol alcohol; esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol monostearate, glycerol distearate, glycerol tristearate, alkyl lactate, alkyl citrate and alkyl tartrate; essential oils and extracts thereof such as mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene and terpenoid oils; and mixtures of.

8. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 5, wherein said essential oil is selected from group comprising mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene, rose, lemon grass, peach, honey, almond oil, olive oil, shea butter, olive butter, bearberry, black currant, rosemary, blue lotus, white lily, and terpenoid oil.

9. The non alcoholic, non-aqueous temporary hair dye spray composition as claimed in claim 5, wherein said fragrance is selected from a group comprising a blend of essential oils and synthetic aroma compounds, benzaldehyde, citral, vanillin, ethyl acetate, fructone, octyl acetate, pentyl butanoate, pentyl pentanoate, methyl salicylate, isoamyl acetate, limonene, citronellol, and mixtures thereof. ,TagSPECI:Field of the Invention
The present invention relates to personal care formulations; more specifically to hair spray composition which delivers color.

Background and the prior art
Various hair dye compositions are known in the art. Hair dye compositions can be temporary or permanent. Temporary hair dye compositions are mainly popular among teenagers who are party goers and would like to temporarily color their hairs, which can be rinsed off later with plain water. Hair dye formulations can be alcohol based and such alcohol based hair sprays are well known in the market. To disperse color through hair spray systems are highly challenging and they are achieved mainly through alcohol based systems. The disadvantages are they may cause hair dryness, brittle, and unacceptable to the consumers.

There are several prior art which disclose various hair colour compositions. WO2009078017 discloses hair coloring composition comprising at least one hair coloring agent and a carrier which comprises: (i) a hydrophobic volatile solvent, in a concentration that ranges from 20 to 60 weight percents; (ii) water, in a concentration that ranges from 20 to 60 weight percents;
(iii) a glycol, in a concentration that ranges from 0.5 to 10 weight percents; and
(iv) a surface active agent, in a concentration that ranges from 0.1 to 7.5 weight percents; the formulation being substantially devoid of an alcohol. This composition contains surface active agents which while cleansing requires more water for rinse off. WO2009078017 discloses addition of silicones (hydrophobic volatile solvent) at greater levels which makes the final formulation costly and gives a tacky feeling to the hair.

US2008189876 discloses a hair treatment kit suitable for application as a multistep hair color revitalizing product is disclosed. The kit contains: (a) a first composition containing a temporary dye, a semi permanent hair dye, or a mixture thereof, (b) a second composition containing a silicone hair glossing agent, and labeling having indicia instructing a topical application of the second composition to hair after a topical application of the first composition to the hair. US'876 mentions that the first composition may contain hydrophilic conditioning agents such as polydialkylsiloxanes, polydiarylsiloxanes, polyalkarylsiloxanes, cyclomethicones having 3 to 9 silicon atoms. US’876 mention that the second composition is in the form of a non aqueous liquid for ease of application to the hair, such as a spray or aerosol. The glossing compound is a silicone compound, and more preferably a blend of silicones, for example, a blend of a volatile and a nonvolatile silicone. Preferred silicones used in the second glossing composition are dimethicones, dimethiconols, cyclomethicones, and mixtures thereof. A preferred silicone is a blend of a dimethiconol with a dimethicone and/or a cyclomethicone. However this patent application discloses multiple formulations in the form of a kit and there is no disclosure of any single system/composition which gives the desired effect.

GB1349424 discloses an aerosol hair dye composition comprising a hair dye concentrate and a propellant blend which is a mixture of halogenated low molecular weight hydrocarbons at least one of which is a fluorinated hydrocarbon containing no other halogen atoms having a vapour pressure in the range 10-115 p.s.i.a. at 70°F, the fluorinated hydrocarbon comprising 20-90 wt. per cent of the propellant blend. The direct dyes may be acid, basic or non-ionic and may be of the nitro, anthroquinone, naphthoquinone, azo arylmethane, azine, quinoline, indamines, indaphenol acridine or xanthene types. The direct dye concentrates may also contain water, surfactants (anionic, cationic or non-ionic), thickeners (e.g. cellulose derivatives, gum arabic, sodium alginate, acrylic polymers, fumed silica or colloidal magnesium aluminate silicate), cosolvents (e.g. alcohols and glycols), alkalis or acids and perfumes. GB1349424 is based on flourinated hydrocarbons, alcoholic and surfactant based. The propellants of GB1349424 are CFCs which are banned for use. Further GB1349424 discloses a system which is limited to use of alcohol, ammonia and water based system. One of the major disadvantages of water based systems is that these give foam when applied. This character is undesirable for a temporary hair colorant system. Non alcoholic, non-aqueous systems do not give any such problem of foam hence are desired.
Thus there is a need in the market to design a temporary hair dye spray composition which is less viscous, high volatile, acceptable to the consumers and contains safe components.

Object of the present invention
It is an object of the present invention to overcome the drawbacks of the prior art.

It is another object of the present invention to provide a hair spray composition which is less viscous, high volatile and acceptable to the consumers.

It is yet another object of the present invention to provide "single" formula which is devoid of glycol, water etc and can be delivered in an aerosol format.

It is a further object of the present invention to provide a temporary hair dye formulation which when applied, spreads uniformly and "instantaneous" in nature.

Summary of the present invention
According to one aspect of the present invention there is provided a non alcoholic, non-aqueous temporary hair dye spray composition comprising:
a) 10 to 18.4 % by weight of at least one volatile silicone;
b) 0.8 to 1.5 % by weight of hydrophobic fumed silica;
c) 0.8 to 1.5% by weight of at least one oil soluble coloring agent and
d) propellant selected from the group consisting of ethane, methane, propane, butane, isobutene, pentane, carbon dioxide, nitrogen and mixtures thereof;
wherein weight ratio of said hydrophobic fumed silica to said oil soluble coloring agent is from about 1: 1 to about 1:1.25, and wherein the weight of said propellant in the temporary hair dye composition is 80% of the total weight of the composition.

Brief description of accompanying drawings
Figure 1 illustrates the stability of formulations A, B and C which have been prepared using various thickeners.
Detailed description of the present invention
The present invention provides a novel non alcoholic, non-aqueous temporary hair dye spray composition comprising atleast one volatile silicone with hydrophobic fumed silica with atleast one oil soluble coloring agent at a specific range. The hair dye spray composition is temporary in nature, is less viscous, high volatile, acceptable to the consumers and contains safe components.

By definition, "acceptable" in terms of product characteristics means, products that provide smooth finish, softness, instantaneous, no damage or reduced damage to the hair.

The present invention contemplates a hair spray composition to deliver color onto the hair, comprising the essential elements such as atleast one volatile silicone, fumed silica and atleast one coloring agent.

The present inventors have found that the selective combination of fumed silica, volatile silicone, coloring agent at specific concentrations; more specifically the unique ratio of silica to pigment and the amount of propellant in a spray format provides uniform dye, acceptable sensorial and remains stable.

It is noted very surprisingly by the inventors of the present invention that when a) fumed silica; and b) pigment are added in the dye composition as that in the present invention at a ratio of from about 1: 1 to about 1:1.25, the dye remains stable in the formulation before application and provides optimum in-use and post application colour characteristics. Further the inventors have found that a composition with high propellant content wherein the ratio of propellant to the remaining liquid of the composition is 80:20, possesses high stability and provides desired sensorial benefits to the end consumer without affecting the texture of hair.

The invention discloses a non alcoholic, non-aqueous temporary hair dye spray composition comprising :
a) 10 to 18.4 % by weight of at least one volatile silicone;
b) 0.8 to 1.5 % by weight of hydrophobic fumed silica;
c) 0.8 to 1.5% by weight of at least one oil soluble coloring agent and
d) propellant selected from the group consisting of ethane, methane, propane, butane, isobutene, pentane, carbon dioxide, nitrogen and mixtures thereof;
wherein weight ratio of said hydrophobic fumed silica to said oil soluble coloring agent is from about 1: 1 to about 1:1.25, and wherein the weight of said propellant in the temporary hair dye composition is 80% of the total weight of the composition.

The volatile silicones used in the present invention is selected from the group consisting of phenyltrimethicone, dimethicone, trisiloxane, cyclohexasiloxane, disiloxane, volatile methyl siloxane, cyclopentasiloxane, cyclotetrasiloxane, polydimethylsiloxane, Cyclotetrasiloxane, cyclopentasiloxane, Caprlylyl Methicone, Volatile dimethicone, Aminopropyl Phenyl Trimethicone and mixtures thereof. The volatile silicones may be present in an amount 10 to 18.4 wt% by weight.

The oil soluble coloring agent / pigment used in the present invention is selected from the group consisting of Oil-Soluble Dyes. Certified oil-soluble dyes are synthetic organic substances which are manufactured so that each batch passes a U.S. Food &Drug Administration (FDA) purity inspection. If approved by the FDA, these dyes are certified for use in foods, drugs, cosmetics (FD&C colors), drugs and cosmetics only (D&C colors), or only in topically applied drugs and cosmetics (external D&C colors). All oil-soluble, certified dyes as are used mostly in water resistant cosmetic products, including foundations and eye liners may be used in the preparation of temporary hair dye of the present invention. The present invention comprises at least one oil soluble dye. In principal any oil soluble dye is suitable for the purpose of the present invention. Non-limiting examples to suitable ones are with their colour index numbers D&C Green #6, D&C Violet #2, D&C Red #17, D&C Yellow #10 and D&C Yellow #11, CI 12100, CI 12140, CI 12700, CI 12740, CI 26100, CI 26105, CI 45396, CI 45410, CI 45425, CI 47000, CI 60725, CI 60724, CI 61520, CI 61565, CI 40800, CI75810, CI75120 and CI12150, Azo dyes, Nitro Dyes, natural dyes such as carotenoids including astaxanthin, lutein, violaxanthin and neoxanthine cryptoxanthin, canthaxanthin, zeaxanthin, citranaxanthin, beta-carotene, beta-4'-carotenal, beta-8'- carotenal, beta-12'-carotenal, beta-8'-carotenoic acid, lycopene, torularodin aldehyde, torularodin ethyl ester, neurosporaxanthin ethyl ester, zetacarotene, dehydroplectania- xanthin and the like, combinations and mixtures thereof.
Concentration of oil soluble dyes/coloring agent in the compositions of the present invention varies in the range of 0.7 to 2%, preferably 0.8 to 1.5, and most preferably 0.8 to 1.5% by weight calculated to total composition.

The amount of hydrophobic fumed silica as may be added to the composition of the present invention varies in the range of 0.7 to 2%, preferably 0.8 to 1.75, and most preferably 0.8 to 1.5% by weight calculated to total composition.

The propellant used in the present invention is selected from the group consisting of ethane, methane, propane, butane, isobutene, pentane, carbon dioxide and nitrogen and mixtures thereof.

The temporary hair dye composition used in the present invention may further comprise fillers and carriers that may be added to the current formulation to improve the colouring property by acting as carrier of colour and also improve the stay on effect of colour. Such fillers and carriers may be selected from a group comprising but not limited to starches such as corn starch, wheat starch, maize starch, fumed silica, talc, clays, Kaolin, manganese containing clays, mica, silica, polyamide powder, poly-beta-alanine powder and polyethylene powder, tetrafluoroethylene polymer, lauroyllysine, starch, boron nitride, elastomeric polyorganosiloxane particles, precipitated calcium carbonate, magnesium carbonate and magnesium hydrocarbonate, hydroxyapatite, zinc, magnesium or lithium stearate, zinc laurate or magnesium myristate. The fillers may be present in a proportion of from 0 to 15% by weight, typically 0.01% to 10% by weight relative to the total weight of the composition.

Mositurizers and emollients that may be used in the present invention include but are not limited to silicone oils and modifications thereof such as linear and cyclic polydimethylsiloxanes; amino, alkyl, alkylaryl, and aryl silicone oils (DC fluid Range); fats and oils including natural fats and oils such as jojoba, soybean, sunflower, rice bran, avocado, almond, olive, sesame, persic, castor, coconut, mink oils; cacao fat; beef tallow, lard; hardened oils obtained by hydrogenating the aforementioned oils; and synthetic mono, di and triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride; waxes such as carnauba, spermaceti, beeswax, lanolin, and derivatives thereof; hydrophobic plant extracts; hydrocarbons such as liquid paraffin, petrolatum, microcrystalline wax, ceresin, squalene, pristan and mineral oil; higher fatty acids such as lauric, myristic, palmitic, stearic, behenic, oleic, linoleic, linolenic, lanolic, isostearic, arachidonic and poly unsaturated fatty acids (PUFA);Polyols such as glycerin, glycol and derivatives, higher alcohols such as lauryl, cetyl, stearyl, oleyl, behenyl, cholesterol and 2-hexydecanol alcohol; esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol monostearate, glycerol distearate, glycerol tristearate, alkyl lactate, alkyl citrate and alkyl tartrate; essential oils and extracts thereof such as mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene and terpenoid oils; and mixtures of any of the foregoing components, and the like. Advantageously emollients and moisturizers can be used may be used from about 5, 10 or 15% by wt.

Essential oils and extracts that may be used in the present invention include but are not limited to mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene, rose, lemon grass, peach, honey, almond oil, olive oil, shea butter, olive butter, bearberry, black currant, rosemary, blue lotus, white lily, and terpenoid oils.

The composition of the invention may utilize a fragrance composition comprising a blend of essential oils and synthetic aroma compounds. The blend is often diluted with a carrier like propylene glycol, vegetable oil, or mineral oil. Some examples of synthetic aroma compound that are suitable for temporary dye compositions of the present invention include, but are not limited to benzaldehyde, citral, vanillin, ethyl acetate, fructone, octyl acetate, pentyl butanoate, pentyl pentanoate, methyl salicylate, isoamyl acetate, limonene, citronellol, and mixtures thereof. Preferably, the fragrance containing the essential oil is present in the composition of the invention in an amount between approximately 0.1% to approximately 2% by weight.

The composition of the present invention can be prepared by the process comprising the steps of:
1. blending fumed silica and pigment(s)/colouring agents to obtain a uniform mixture;
2. mixing the uniform mixture of step (1) with volatile silicone(s) under continuous stirring condition at 1800 rpm to obtain a uniform blend;
3. optionally adding emotive(s), fragrance(s), filler(s), carrier(s), emollient(s), essential oil(s) and active(s) to the blend of step (2) and pressure filling of propellants at predetermined ratios to obtain the dye formulation of the present invention.
The advantages of the present invention is to preclude the pre conditioning of the hair, e.g. bleaching, and stain onto the scalp or any other region during use and/or post use.

The present invention is herein after illustrated by way of non-limiting examples.

Example 1
A composition in accordance with the present invention has been prepared with components mentioned in Table 1 following the below process steps:
1. fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 mins to get a uniform mixture of both colour and fumed silica;
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm;
3. the mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain a slurry of fumed silica, colour pigment and silicones;
4. liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.
Table 1
S. No. Ingredients Propellant : Liquid Ratio (80:20)
1 Fumed silica 0.8
2 CI 12740 0.8
3 Propellant 80
4 Cyclotetrasiloxane & phenyltrimethicone 9.2
5 Caprlylyl Methicone 9.2

Example 2
The present invention discloses a unique propellant to liquid ratio which when used provides desired sensorial benefits to the end consumer without affecting the texture of hair. To show the criticality of such ratio, three formulations have been developed where the ratio of the propellant to remaining liquid have been varied as given below.

Working example: Propellant: Liquid (liquid concentrate) - 80:20
A sample was prepared with Propellant to Liquid (liquid concentrate) ratio as 80:20 in accordance with example 1. The stability of this sample was observed for 72 hours.

Observation: Stable dye formulation was obtained. Suspension was stable till 72 hrs.

Non working example (a)
A composition was prepared with components mentioned in Table 2 following the below process steps:
1. Fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 mins to get a uniform mixture of both colour and fumed silica.
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm.
3. The mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain a slurry of fumed silica, colour pigment and silicones.
4. Liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 2
S.No Ingredients Propellant : Liquid Ratio (25: 75)
1 Fumed silica 1
2 CI 12740 1
3 Propellant 75
4 Cyclotetrasiloxane & phenyltrimethicone 11.5
5 Caprlylyl Methicone 11.5

The above sample was sprayed on hair strands.
Observation: The sample was liquidy and the colour did not stay on hair post application. This observation was made instantaneously after the application and it was observed for 4 hrs. Thus non-uniform colour coating was observed on hair.

Non working example (b)
A composition was prepared with components mentioned in Table 3 following the below process steps:
1. fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 minutes to get a uniform mixture of both colour and fumed silica;
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm;
3. the mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain slurry of fumed silica, colour pigment and silicones;
4. liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 3
S.No. Ingredients Propellant : Liquid Ratio (60:40)
1 Fumed silica 1.6
2 CI 12740 1.6
3 Propellant 60
4 Cyclotetrasiloxane & phenyltrimethicone 18.4
5 Caprlylyl Methicone 18.4

The above sample was sprayed on hair strands.

Observation: Non-uniform coatings of colour obtained and slow dry off of colour on hair. The sample was liquidy and the colour did not stay on hair post application. This observation was made instantaneously after the application and it was observed for 4 hours.

Example 3
The present inventors have found that when a) fumed silica; and b) pigment are added in the dye hair spray composition at a ratio of from about 1:1 to about 1:1.25, the dye remains stable in the formulation before application and provides desirable in-use and post application colour characteristics. To show the criticality of such ratio three formulations have been developed where the ratio of the propellant to remaining liquid have been varied as given below.

Working example (a): Ratio of fumed silica: pigment = 1:1
A composition was prepared with components mentioned in Table 4 following the below process steps:
1. Fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 minutes to get a uniform mixture of both colour and fumed silica;
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm;
3. The mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain slurry of fumed silica, colour pigment and silicones;
4. Liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 4
S.No. Ingredients Wt%
1 Fumed silica 0.8
2 CI 12740 0.8
3 Propellant 80
4 Cyclotetrasiloxane & phenyltrimethicone 9.1
5 Caprlylyl Methicone 9.1
6 Aminopropyl Phenyl Trimethicone 0.2

Observation: No settling of colour was observed. Suspension was stable till 72 hrs. Hence give stable formulation

Working example (b): Ratio of fumed silica: pigment = 1:1.25
A composition was prepared with components mentioned in Table 5 following the below process steps:
1. Fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 mins to get a uniform mixture of both colour and fumed silica.
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm
3. The mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain slurry of fumed silica, colour pigment and silicones.
4. Liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 5
S.No. Ingredients Wt%
1 Fumed silica 1
2 CI 12740 1.25
3 Propellant 80
4 Cyclotetrasiloxane & phenyltrimethicone 8.5
5 Caprlylyl Methicone 8.5
6 Aminopropyl Phenyl Trimethicone 0.75

Observation: No settling of colour was observed. Suspension was stable till 72 hrs. Hence give stable formulation

Non working example (a): Ratio of fumed silica: pigment = 3:4
A composition was prepared with components mentioned in Table 6 following the below process steps:
1. fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 mins to get a uniform mixture of both colour and fumed silica;
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm;
3. the mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain slurry of fumed silica, colour pigment and silicones;
4. liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 6
S.No. Ingredients Wt%
1 Fumed silica 0.75
2 CI 12740 1
3 Propellant 80
4 Cyclotetrasiloxane & phenyltrimethicone 8.65
5 Caprlylyl Methicone 9.2
6 Aminopropyl Phenyl Trimethicone 0.4

Observation: Stable formulation was not obtained. Settling of colour was observed after 30 minutes. Settling of colour pigment was obtained.

Non working example (b): Ratio of fumed silica: pigment =3:2
A composition was prepared with components mentioned in Table 7 following the below process steps:
1. fumed silica and colour pigment were weighed in a grinder jar and grinded for 2 mins to get a uniform mixture of both colour and fumed silica;
2. all volatile silicone were weighed in a beaker and put under stirring at a medium speed of 1800 rpm;
3. the mixture of fumed silica and colour pigment of step (1) was then slowly added into the volatile silicone mixture of step (2) and mixed well to obtain slurry of fumed silica, colour pigment and silicones;
4. liquid gas in accordance with the below ratio weight was added to the slurry of fumed silica, colour pigment and silicones in a desired can and then pressurized filled it.

Table 7
S.No. Ingredients Wt%
1 Fumed silica 1.5
2 CI 12740 1
3 Propellant 80
4 Cyclotetrasiloxane & phenyltrimethicone 8.6
5 Caprlylyl Methicone 8.7
6 Aminopropyl Phenyl Trimethicone 0.2

Observation: Stable formulation was obtained. But when it is evaluated on hair tresses then it is found to be not depositing the colour on hairs and not giving proper colour shade. Moreover after 30 minutes it gives dry feel to hair.

Non working example (c): Ratio of fumed silica: pigment =1:1.5
Another formulation was prepared in accordance with the formulation of Table 7, except that the ratio of fumed silica: pigment was kept at 1:1.5. It was observed that the formulation obtained faces stability issues and the pigment in such formulations settles down.

Example 4
Various formulations have been prepared using fumed silica as thickener as in the present invention and other thickeners (as mentioned in the GB1349424) such as Acrylic Polymers, Colloidal Magnesium Silicate. The formulations details are shown in Table 8.

Table 8
S.No. Ingredients Formulation A (Wt%) Formulation B (Wt%) Formulation C (Wt%)
1 Fumed silica 1 ___ ___
2 Colloidal Magnesium Aluminium Silicate ___ 1 ___
3 Acrylic Polymer (Acrylates/C10-30 Alkyl Acrylate Crosspolymer) ___ ___ 1
4 CI 12740 1 1 1
5 Propellant 80 80 80
6 Cyclotetrasiloxane and phenyltrimethicone 8.9 8.9 8.9
7 Caprlylyl Methicone 8.9 8.9 8.9
8 Aminopropyl Phenyl Trimethicone 0.2 0.2 0.2

Observations: It was observed that the formulations B and C are not stable and settles down whereas the formulation A is a stable system which can hold the color in it as evident from figure 1.