Aerosol Hairspray Product Comprising a Spraying Device

Abstract

The present invention relates to an aerosol hairspray product. The product comprises: a pressurisable container comprising a container wall which encloses a reservoir for storing a hairstyling formulation and a liquefied gas propellant; and a spraying device attached to the container for dispensing the hairstyling formulation from the reservoir of the container. The spraying device comprises a valve and a nozzle and the valve comprises a valve body, a stem and a spring means. The valve body houses an insert and the insert comprises an insert orifice and at least two channels. The channels are tangentially disposed about the insert orifice. Also the valve body comprises at least two vapour taps. Furthermore the insert orifice is capable of being in liquid communication with the hairstyling formulation in the reservoir.

What is claimed is: 
     
         1 . A method of styling hair comprising:
 a. providing an aerosol hairspray product comprising a pressurisable container comprising:
 i. a container wall which encloses a reservoir for storing a liquefied gas propellant and a hairstyling formulation; 
 ii. a spraying device attached to the container for dispensing the hairstyling formulation from the reservoir of the container, wherein the spraying device comprises a valve and a nozzle;
 wherein the liquefied gas propellant wherein the propellant comprises from about 35% to about 50% dimethylether, by total weight of the hairstyling formulation and propellant; 
 wherein the hairstyling formulation comprises:
 from about 41% to about 60% water, by total weight of the hairstyling formulation and propellant; 
 from about 5.0% to about 15% hairstyling polymer by total weight of the hairstyling formulation and propellant, wherein the hairstyling polymer is water-soluble; 
 wherein the hairstyling formulation is free of ethanol, isopropanol, and propanol; 
 wherein the hairstyling formulation without propellant has a viscosity of from about 0.5 cSt to about 6 cSt, wherein the viscosity is measured at 20° C.+/−0.1° C.; 
 
 
   b. causing the product to spray at a delivery rate, wherein the delivery rate is from about 0.25 g/sec to about 0.45 g/sec;
 wherein an ejected composition is sprayed and comprises particles having an average particle size distribution (Dv50) from about 40 microns to about 100 microns. 
   
     
     
         2 . The method according to  claim 1 , wherein the hairstyling formulation is free of alcohol. 
     
     
         3 . The method according to  claim 1 , wherein the pressure inside the container is from about 3 bar to about 5 bar, at 20° C. 
     
     
         4 . The method according to  claim 2 , wherein the pressure inside the container is from about from 4 bar to 5 bar, at 20° C. 
     
     
         5 . The method according to  claim 1 , wherein the hairstyling formulation further comprises a surfactant. 
     
     
         6 . The method according to  claim 1 , wherein the hairstyling formulation comprises a panthenol compound and/or a silicone compound. 
     
     
         7 . The method according to  claim 1 , wherein the hairstyling formulation comprises from about 5.5% to about 8% hairstyling polymer. 
     
     
         8 . The method according to  claim 1 , wherein the hairstyling polymer is an anionic polymer. 
     
     
         9 . The method according to any  claim 1 , wherein the hairstyling polymer is a non-ionic polymer. 
     
     
         10 . The method according to  claim 1 , wherein the hairstyling polymer is a cationic polymer. 
     
     
         11 . The method according to  claim 1 , wherein the hairstyling polymer is an amphoteric polymer. 
     
     
         12 . The method according to  claim 1 , wherein the hairstyling polymer is an anionic hairstyling polymer, and wherein the anionic hairstyling polymer is selected from:
 copolymers derived from acrylic acid such as the acrylic acid/ethylacrylate/N-tert-butylacrylamide terpolymers; Octylacrylamide/Acrylates/Butylaminoethyl/Methacrylate Copolymers; methacrylic acid/ester acrylate/ester methacrylates; Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer; methacrylic acid/hydroxyethylmethacrylate/various acrylate esters;   acrylates/hydroxyethylmethacrylate; methacrylic acid/hydroxyethylmethacrylate/various acrylate esters; n-butyl methacrylate/methacrylic acid/ethyl acrylate copolymers;   copolymers derived from crotonic acid, such as vinyl acetate/vinyl tertbutylbenzoate/crotonic acid terpolymers; and the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers; and mixtures thereof.   
     
     
         13 . The method according to  claim 1 , wherein the hairstyling polymer is selected from the group consisting of: acrylates copolymers of two or more monomers of (meth)acrylic acid or one of their simple esters; octylacrylamide/acrylate/butylaminoethyl methacrylate copolymers; acrylates/hydroxyesters acrylates copolymers of butyl acrylate, methyl methacrylate, methacrylic acid, ethyl acrylate and hydroxyethyl methacrylate; polyurethane-14/AMP-acrylates copolymer blend; and mixtures thereof. 
     
     
         14 . The method according to  claim 1 , wherein the particles have an average particle size distribution (Dv50) of from about 45 microns to about 100 microns. 
     
     
         15 . The method according to  claim 1 , wherein the particles have an average particle size distribution (Dv50) of from about 50 microns to about 90 microns. 
     
     
         16 . The method according to  claim 1 , wherein the delivery rate is from about 0.33 g/sec to about 0.45 g/sec. 
     
     
         17 . A method of styling hair comprising:
 a. providing an aerosol hairspray product comprising a pressurisable container comprising:
 i. a container wall which encloses a reservoir for storing a liquefied gas propellant and a hairstyling composition; 
 ii. a spraying device attached to the container for dispensing the hairstyling formulation from the reservoir of the container, wherein the spraying device comprises a valve and a nozzle;
 wherein the gas propellant comprises from about 40% to about 45% dimethylether, by total weight of the hairstyling formulation and propellant, and a hairstyling formulation comprising: 
 wherein the hairstyling formulation comprises:
 from about 41% to about 60% water, by total weight of the hairstyling formulation and propellant; 
 from about 5.5% to about 8% hairstyling polymer by total weight of the hairstyling formulation and propellant, wherein the hairstyling polymer is water-soluble and wherein the hairstyling polymer is an acrylate copolymer; 
 wherein the hairstyling formulation is free of alcohol; 
 wherein the hairstyling formulation without propellant has a viscosity of from about 0.5 cSt to about 6 cSt, wherein the viscosity is measured at 20° C.+/−0.1° C.; 
 
 
   b. causing the product to spray at a delivery rate, wherein the delivery rate is from about 0.3 g/sec to about 0.45 g/sec; and
 wherein an ejected composition is sprayed and comprises particles having an average particle size distribution (Dv50) from about 50 microns to about 90 microns.