Hair spray compositions

Abstract

Hair spray compositions containing a carboxylated polyurethane resin, and having a low volatile organic content, are disclosed. The compositions have a low viscosity, and can be applied as a pump spray or as an aerosol, to hold the hair and impart excellent hair set retention properties. The hair spray compositions can be used with a curling iron or a blow dryer to style the hair.

What is claimed is:  
     
         1 . A hair spray composition comprising: 
 (a) about 0.25% to about 6% by weight of a carboxylated polyurethane resin;    (b) 0% to about 80% by weight of an alcohol; and    (c) about 15% to about 95% by weight water, wherein the carboxylated polyurethane resin has a weight average molecular weight of about 15,000 to about 150,000, and is a reaction product of a mixture comprising: 
 (i) about 10% Lo about 90% by weight of the mixture of a polyoxyalkylene diol having a number average molecular weight of about 400 to about 20,000;  
 (ii) about 0.0% to about 20% by weight of the mixture of an alkylene glycol;  
 (iii) about 3% to about 80% by weight of the mixture of an organic diisocyanate;  
 (iv) about 0.1% to about 30% by weight of the mixture of a 2,2-di(hydroxymethyl)-alkanoic acid; and  
 (v) about 0.001% to about 0.95% by weight of the mixture of water, wherein a ratio of isocyanate groups to hydroxyl groups is about 0.4 to about 1.1.  
   
     
     
         2 . The composition of  claim 1  further comprising about 5% to about 30% by weight of a propellant.  
     
     
         3 . The composition of  claim 1  wherein the composition is free of a neutralizing agent for the carboxylated polyurethane resin.  
     
     
         4 . The composition of  claim 1  having a viscosity of about 1 to about 25 centipoise.  
     
     
         5 . The composition of  claim 1  wherein the carboxylated polyurethane resin has a weight average molecular weight of about 15,000 to about 100,000.  
     
     
         6 . The composition of  claim 1  wherein the carboxylated polyurethane resin has a weight average molecular weight of about 20,000 to about 70,000.  
     
     
         7 . The composition of  claim 1  wherein the carboxylated polyurethane resin has a weight average molecular weight of about 30,000 to about 65,000.  
     
     
         8 . The composition of  claim 1  wherein the carboxylated polyurethane resin has an acid value of at least 7 mg KOH/g resin.  
     
     
         9 . The composition of  claim 1  wherein the carboxylated polyurethane resin has a melting point of about 40° C. to about 120° C.  
     
     
         10 . The composition of  claim 1  wherein the polyoxyalkylene diol comprises a blend of two or more polyoxyalkylene diols.  
     
     
         11 . The composition of  claim 1  wherein the polyoxyalkylene diol is selected from the group consisting of a polyoxyethylene diol having a number average molecular weight of about 400 to about 20,000, a polyoxypropylene diol having a number average molecular weight of about 200 to about 2,500, a block copolymer of ethylene oxide and propylene oxide having a number average molecular weight of about 1,000 to about 9,000, a polyoxytetramethylene diol having a number average molecular weight of about 200 to about 4,000, and mixtures thereof.  
     
     
         12 . The composition of  claim 1  wherein the polyoxyalkylene diol comprises a polyoxyethylene diol having a number average molecular weight of about 6000 to about 10,000.  
     
     
         13 . The composition of  claim 12  wherein he polyoxyalkylene diol further comprises a polypropylene glycol having a number average molecular weight of about 1,000 to about 3,500, a polyoxyethylene glycol having a number average molecular weight of about 600 to about 2,500 or a mixture thereof.  
     
     
         14 . The composition of  claim 1  wherein the water is present in an amount of about 0.01% to about 0.65%.  
     
     
         15 . The composition of  claim 1  wherein the alkylene glycol is selected from the group consisting of ethylene glycol, propylene glycol, 2-ethyl1,3-hexanediol, tripropylene glycol, triethylene glycol, 2,4pentanediol, 1,4-butanediol, 2-methyl-1,3-propanediol, cyclohexanediol, cyclohexanedimethanol, 2-methyl-1,3-pentadediol, dipropylene glycol, diethylene glycol, and mixtures thereof.  
     
     
         16 . The composition of  claim 1  wherein the organic diisocyanate is an aliphatic diisocyanate.  
     
     
         17 . The composition of  claim 16  wherein the aliphatic diisocyanate is selected from the group consisting of methylene bis(cyclohexyl-4-isocyanate), trimethylhexamethylene diisocyanate, isophorone diisocyanate, tetramethylene duisocyanate, hexamethylene diisocyanate, trimethylene diisocyanate, cyclohexyl-1,2-diisocyanate, cyclohexyl-1,4-diisocyanate, and mixtures thereof.  
     
     
         18 . The composition of  claim 1  wherein the 2,2-di (hydroxymethyl) alkanoic acid comprises dimethylolpropionic acid.  
     
     
         19 . The composition of  claim 1  wherein the 2,2-di (hydroxymethyl) alkanoic acid is present in an amount of about 0.5% to about 2.7% by weight.  
     
     
         20 . The composition of  claim 1  wherein the water is present in an amount of about 0.01% to about 0.8% by weight.  
     
     
         21 . The composition of  claim 1  wherein the water is present in an amount of about 0.04% to about 0.25%.  
     
     
         22 . The composition of  claim 1  wherein the water is present in an amount of about 0.08% to about 0.45%, by weight, and the ratio of isocyanate groups to hydroxyl groups is about 0.55 to about 0.95.  
     
     
         23 . The composition of  claim 1  wherein the water is present in an amount of about 0.15% to about 0.45% by weight, and the ratio of isocyanate groups to hydroxyl groups is about 0.6 to about 0.92.  
     
     
         24 . The composition of  claim 1  wherein the ratio of isocyanate groups to hydroxyl groups is about 0.45 to about 1.  
     
     
         25 . The composition of  claim 1  wherein the ratio of isocyanate groups to hydroxyl groups is about 0.5 to about 0.98.  
     
     
         26 . The composition of  claim 1  wherein the carboxylated polyurethane resin has a weight average molecular weight of about 15,000 to about 40,000 and the ratio of isocyanate groups to hydroxyl groups is about 0.4 to about 0.75.  
     
     
         27 . The composition of  claim 2  wherein the propellant is selected from the group consisting of trichlorofluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane, trichlorotrifluoroethane, dimethyl ether, propane, n-butane, isobutane, dimethyl ether, carbon dioxide, nitrogen, helium, a perfluorinated oxetane, a perfluorinate oxepane, and mixtures thereof.  
     
     
         28 . The composition of  claim 1  comprising about 1% to about 3% of the carboxylated polyurethane resin, about 50% to about 60% ethanol, and about 40% to about 45% water.  
     
     
         29 . A method of treating hair to fix the hair in a desired hairstyle comprising: 
 (a) configuring the hair in the desired hairstyle; and    (b) applying a hair spray composition to the hair, said hair spray composition comprising    (i) about 0.25% to about 6% by weight of a carboxylated polyurethane resin;    (ii) 0% to about 80% by weight of an alcohol; and    (iii) about 15% to about 95% by weight water, wherein the carboxylated polyurethane resin has a weight average molecular weight of about 15,000 to about 150,000, and is a reaction product of a mixture comprising: 
 (A) about 10% to about 90% by weight of the mixture of a polyoxyalkylene diol having a number average molecular weight of about 400 to about 20,000;  
 (B) about 0.01% to about 20% by weight of the mixture of an alkylene glycol;  
 (C) about 3% to about 80% by weight of the mixture of an organic diisocyanate;  
 (D) about 0.% to about 30% by weight of the mixture of a 2,2-di(hydroxymethyl)alkanoic acid; and  
 (E) about 0.001% to about 0.95% by weight of the mixture of water, wherein a ratio of isocyanate groups to hydroxyl groups is about 0.4 to about 1.1.  
   
     
     
         30 . The method of  claim 29  wherein the hair spray composition further comprises about 5% to about 30% by weight of a propellant.  
     
     
         31 . The method of  claim 29  wherein the hair is configured in the desired hairstyle prior to applying the hair spray composition.  
     
     
         32 . The method of  claim 29  wherein the hair is configured in the desired hairstyle after applying the hair spray composition.  
     
     
         33 . The method of  claim 32  wherein the hair is configured using a curling iron or a blow dryer.