Patent Publication Number: US-2016243020-A1

Title: Composition

Description:
The present invention relates to a dry shampoo. 
     Dry shampoos are compositions for cleansing the hair without washing with water. The product provides a suitable product to provide a clean feel and look on days when perhaps there is no opportunity, either through lack of time or lack of available water, to wash the hair. 
     Database GNPD [Online] Mintel November 2011 (2011-11) “Instant Dry Shampoo” XP002683579 Database accession no. 1669958 discloses a dry shampoo comprising aluminium starch octenylsuccinate, silica and glycerine. The composition also comprises butylenes glycol. 
     Database GNPD [Online] Mintel February 2011 (2012-02) “Instant Dry Shampoo” XP002683580 Database accession no. 1727707 discloses a dry shampoo comprising aluminium starch octenylsuccinate, silica and glycerine. The composition also comprises butylenes glycol. 
     Despite the prior art there remains a need for improved dry shampoos. In particular there is a need for dry shampoos to provide sebum removal, i.e. cleansing of the hair and also to provide volume to the hair. 
     We have surprisingly found that an improved dry shampoo can be formulated with synthetic particles. The particles are applied to the hair in the usual manner and removed by applying a comb or brush through the hair. The consumer is provided with a simple yet effective means for cleaning the hair on a non-wash day. 
     Accordingly, and in a first aspect, the present invention provides a dry shampoo composition comprising a base and propellant, wherein the base comprises sebum absorber particles, said particles comprising acrylate cross-polymer, polydivinyl benzene polymers or or hydrohobically modified polysaccharide derivatives, and wherein the particles are insoluble in water. 
     Preferably, the composition comprises substantially no alcohol. More preferably the composition comprises substantially no ethanol. More preferably, the composition comprises from 0 to 2% wt., most preferably 0 to 1% wt. of the composition alcohol. More preferably, the composition comprises from 0 to 2% wt., more preferably from 0 to 1% wt. of the composition ethanol. 
     Preferably, the base comprises from 5 to 20% wt. of the composition. 
     Preferably, the base comprises from 2 to 75% wt of the base sebum absorber. 
     The particles are preferably crosslinked, preferably at a level of 20-90%, more preferably 50-90%, most preferably 80 -90%. 
     Preferably, the particles comprise styrene/polydivinylbenzene copolymer. 
     More preferably, the particles comprise hydrophobic acrylate, for example, methyl acrylate, ethyl acrylate, butyl acrylate, ethylhexyl acrylate, octyl acrylate, decyl acrylate, lauryl acrylate, hexadecyl acrylate and octadecyl acrylate. 
     The particles may comprise a hydrohobically modified polysaccharide derivative. Preferred hydrohobically modified polysaccharide derivatives are hydrophobically modified cellulose derivatives. A preferred derivative is triacetate. An even more preferred cellulose derivative is cellulose acetate Butyrate, available from, from example, Eastman. 
     Preferably, the sebum absorbers have an average particle size d(0.5) as measured using a Malvern (DLS) Mastersizer 2000 from 2 to 120 microns, more preferably from 5 to 90 microns. 
     Preferred particles include Spheromers CA6 ex. Microbeads AS, SunPPMA-COCO130, SunPPMA-COCO170, SunPPMA-P and SunPPMA-PH ex. Sunjin Chemicals, and the Celluflows C-25 and TA-25 ex. JNC Corporation. 
     Preferably, the dry shampoo comprises an oil which is preferably present at from 0.1 to 5% wt. of the base. 
     Preferably, the oil is isopropyl myristate, benzyl alcohol, PPG-3 benzyl ether myristate. The most preferred is isopropyl myristate. 
     Preferably, the dry shampoo comprises propylene glycol. Preferably any propylene glycol is present at from 0.5 to 5% wt. of the base. 
     In a composition according to the invention the propylene glycol reduces or prevents white residues being deposited on the hair. This is particularly problematic for users with dark hair. 
     The composition of the invention also comprises a propellant to suspend the base immediately before mixing and to facilitate its egress from its container. 
     The composition is stored in a pressurised container. Preferably, the container is an aerosol canister. More preferably, the container is an un-lacquered aerosol canister. 
     Suitable propellants are well known in the art and include butane, isobutene and propane. 
    
    
     EXAMPLE 1 
     A virgin hair switch was treated with the control by way of applying sebum directly to the switch. 
     The switch was then treated with a dry shampoo composition comprising one of the test particles and the particles then removed with a magnet. The amount of sebum remaining was then measured as a percentage of that which was applied. 
     EXAMPLE 2 
     Spheromers CA6 ex. Microbeads AS, 
     SunPPMA-COCO130, SunPPMA-COCO170, SunPPMA-P and SunPPMA-PH ex. Sunjin Chemicals, 
     Celluflows C-25 and TA-25 ex. JNC Corporation, 
     Styrene/Divinyl benzene 
     Styrene/Divinyl benzene and lauryl methacrylate (1:0.1) 
     Styrene/Divinyl benzene and 2-ethylhexyl metacrylate (1:0.1) 
     Styrene/Divinyl benzene and butyl acrylate (1:0.1) 
     Styrene/Divinyl benzene and lauryl methacrylate (1:0.3) 
     EXAMPLE 3 
     Porous particles comprising styrene/divinyl benzene and optionally acrylate were prepared by suspension polymerization in a 1 L reactor equipped with a mechanical stirrer and nitrogen inlet according to the recipes shown in Table 1. The heterogeneous reaction mixture was degassed for half an hour whilst being stirred at 500 rpm. The nitrogen source was then raised above the solution and the stirring rate was dropped to 350 rpm. The reaction was allowed to proceed for 18 h at 70° C. The resulting porous particles were collected by filtration and washed by distilled water and ethanol. The particles were then left in 1 L of acetone solution stirring overnight to completely remove any linear polymer. The final product was filtered again and dried in vacuo for 24 hours at 60 ° C. 
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Sample 1 
                 2 
                 3 
                 4 
                 5 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
               
            
               
                 Test particle 
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 Divinyl- 
                 40 
                 g 
                 40 
                 g 
                 40 
                 g 
                 40 
                 g 
                 40 
                 g 
               
               
                 benzene 
               
               
                 (DVB) 
               
               
                 Lauryl 
                   
                   
                 4 
                 g 
               
               
                 methacrylate 
               
               
                 2-Ethylhexyl 
                   
                   
                   
                   
                 4 
                 g 
               
               
                 methacrylate 
               
               
                 Butyl 
                   
                   
                   
                   
                   
                   
                 4 
                 g 
               
               
                 acrylate 
               
               
                 Other 
               
               
                 components 
               
               
                 AIBN 
                 0.6 
                 g 
                 0.6 
                 g 
                 0.6 
                 g 
                 0.6 
                 g 
                 0.6 
                 g 
               
               
                 Toluene 
                 100 
                 ml 
                 150 
                 ml 
                 150 
                 ml 
                 150 
                 ml 
                 200 
                 ml 
               
               
                 Polyvinyl 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
               
               
                 alcohol 
               
               
                 NaCl 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
                 12 
                 g 
               
               
                   
               
            
           
         
       
     
     EXAMPLE 4 
     The following are formulations for dry shampoos comprising particles. They are made by standard processes and comprise any of the particles described herein. 
     
       
         
           
               
               
               
             
               
                   
               
               
                   
                 Dry Shampoo 
                 Inventive Dry 
               
               
                 Ingredient 
                 Control 
                 Shampoo 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 SD Alcohol 40-B (Alcohol Denat.) 
                 13.510 
                 13.510 
               
               
                 Isopropyl Myristate 
                 0.250 
                 0.250 
               
               
                 Aluminium starch octenyl 
                 1.875 
                 — 
               
               
                 succinate 
               
               
                 Test Particles 
                 — 
                 1.875 
               
               
                 Silica 
                 0.065 
                 0.065 
               
               
                 Fragrance (Parfum) 
                 0.300 
                 0.300 
               
               
                 Isobutane (85%), Propane (15%) 
                 84 
                 84 
               
               
                   
                 100.000 
                 100.000 
               
               
                   
               
            
           
         
       
     
     EXAMPLE 5 
     Demonstrating the efficacy of styrene/divinyl benzene and lauryl methacrylate (1:0.3) particles in sebum removal and volume generation. 
     Sebum Removal 
       
     
       
         
           
               
               
               
             
               
                   
                   
               
               
                   
                 DS control 
                 Inventive DS* 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                   
                 Before DS application 
                 100% 
                 100% 
               
               
                   
                 After DS application 
                 25% 
                 32% 
               
               
                   
                   
               
               
                   
                 *containing styrene/divinyl benzene and lauryl methacrylate (1:0.3) particles instead of aluminium starch octenyl succinate. 
               
            
           
         
       
     
     The data shows that the styrene/divinyl benzene and lauryl methacrylate (1:0.3) particles are superior to starch for sebum removal. 
     Volume 
     Volume is not just a style preference but also a measure for cleansing. The more volume returned the greater the cleansing efficacy. 
     
       
         
           
               
               
               
               
               
             
               
                   
                   
               
               
                   
                 Front Volume 
                 Side Volume 
                 Average 
                   
               
               
                   
                 mm 2   
                 mm 2   
                 Volume mm 2   
                 Volume % 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 12187.144 
                 10373.923 
                 11280.5335 
                 100 
               
               
                 Sebum 
                 3904.388 
                 2428.708 
                 3166.548 
                 28.07091 
               
               
                 DS 
                 4954.91 
                 3674.479 
                 4314.6945 
                 38.24903 
               
               
                 control 
               
               
                 Inventive 
                 8496.415 
                 7974.322 
                 8235.3685 
                 73.00513 
               
               
                 DS 
               
               
                   
               
            
           
         
       
     
     The data again shows that styrene/divinyl benzene and lauryl methacrylate (1:0.3) particles are superior to starch. 
     EXAMPLE 6 
     Demonstrating the efficacy of SunPPMA-PH particles in sebum removal and volume generation. 
     Sebum Removal 
       
     
       
         
           
               
               
               
             
               
                   
                   
               
               
                   
                 Comparative 
                   
               
               
                   
                 DS 
                 Inventive DS* 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                   
                 Before DS application 
                 100% 
                 100% 
               
               
                   
                 After DS application 
                 45% 
                 0% 
               
               
                   
                   
               
               
                   
                 *containing SunPMMA PH particles instead of aluminium starch octenyl succinate. 
               
            
           
         
       
     
     Volume 
       
     
       
         
           
               
               
               
               
               
             
               
                   
                   
               
               
                   
                   
                   
                 Average 
                   
               
               
                   
                 Front Volume 
                 Side Volume 
                 Volume 
               
               
                   
                 mm 2   
                 mm 2   
                 mm 2   
                 Volume % 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 12187.144 
                 10373.923 
                 11280.5335 
                 100 
               
               
                 Sebum 
                 3904.388 
                 2428.708 
                 3166.548 
                 28.07091 
               
               
                 DS 
                 8641.725 
                 4862.074 
                 6751.8995 
                 59.85443 
               
               
                 control 
               
               
                 SunPMMA 
                 9793.021 
                 9476.537 
                 9634.779 
                 85.41067 
               
               
                 PH 
               
               
                   
               
            
           
         
       
     
     EXAMPLE 7 
     Demonstrating the efficacy of Celluflow C25 particles in sebum removal and volume generation. 
     Sebum Removal 
       
     
       
         
           
               
               
               
             
               
                   
                   
               
               
                   
                 Comparative 
                   
               
               
                   
                 DS 
                 Inventive DS* 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                   
                 Before DS application 
                 100% 
                 100% 
               
               
                   
                 After DS application 
                 25% 
                 50% 
               
               
                   
                   
               
               
                   
                 *containing Celluflow C25 particles instead of aluminium starch octenyl succinate. 
               
            
           
         
       
     
     Volume 
       
     
       
         
           
               
               
               
               
               
             
               
                   
                   
               
               
                   
                 Front Volume 
                 Side Volume 
                 Average 
                   
               
               
                   
                 mm 2   
                 mm 2   
                 Volume mm 2   
                 Volume % 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 12187.144 
                 10373.923 
                 11280.5335 
                 100 
               
               
                 Sebum 
                 3904.388 
                 2428.708 
                 3166.548 
                 28.07091 
               
               
                 DS 
                 4954.91 
                 3674.479 
                 4314.6945 
                 38.24903 
               
               
                 control 
               
               
                 Celluflow 
                 8808.389 
                 6282.224 
                 7545.3065 
                 66.88785 
               
               
                 C-25 
               
               
                   
               
            
           
         
       
     
     EXAMPLE 8 
     Demonstrating the efficacy of *Celluflow TA25 particles in sebum removal and volume generation. 
     Sebum Removal 
       
     
       
         
           
               
               
               
             
               
                   
                   
               
               
                   
                 Comparative 
                   
               
               
                   
                 DS 
                 Inventive DS* 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                   
                 Before DS application 
                 100% 
                 100% 
               
               
                   
                 After DS application 
                 25% 
                 28% 
               
               
                   
                   
               
            
           
         
       
     
     Volume 
       
     
       
         
           
               
               
               
               
               
             
               
                   
                   
               
               
                   
                 Front Volume 
                 Side Volume 
                 Average 
                   
               
               
                   
                 mm 2   
                 mm 2   
                 Volume mm 2   
                 Volume % 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 12187.144 
                 10373.923 
                 11280.5335 
                 100 
               
               
                 Sebum 
                 3904.388 
                 2428.708 
                 3166.548 
                 28.07091 
               
               
                 DS 
                 4954.91 
                 3674.479 
                 4314.6945 
                 38.24903 
               
               
                 control 
               
               
                 Celluflow 
                 8377.119 
                 7587.96 
                 7982.5395 
                 70.76385 
               
               
                 TA-25