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]. Soc. Cosmet. Chem., 23, 125-131 (February 3, 1972) Amino Alcohols for Neutralization of Carboxylic Resin STANLEY BOHAC, M.S. • Presented May 24-25, 1971, Seminar, Washington, D.C. Synopsis--Different types of AMINO ALCOHOLS are evaluated as the NEUTRALIZATION agents for VEM CARBOXYLIC HAIR SPRAY RESIN. Variation in HYGROSCOPICITY with different relative humdity of amino alcohols themselves is compared with hygroscopicity of the resin neutralized with these amino alcohols. Effect of amino alcohols on pH value and Sward Hardness of neutralized resin is also determined. INTRODUCTION 2-Amino-2-methyl-l,3-propanediol* (AM PD) is the base most o[ten used to obtain water solubility of carboxylic-type hair spray resins. This amino alcohol was recommended [or the widely used resin--National Starch 28-1g10-* (1, 2)--and this is probably the reason why other car- boxylic resins, which became available later, assumed the use of this base. The purpose o[ this study is to evaluate other arnino alcohols and to determine i[ they can also be used as neutralization agents for carboxylic hair spray resins. National Starch resin 28-1g10 has limited solubility in anhydrous ethanol and [or this reason AMPD was chosen this base gives the highest alcohol solubility to the neutralized resin, in comparison with other amino alcohols. Other hair spray resins which are completely soluble in anhydrous ethanol do not have this requirement and thus it should be possible to use different amino alcohols. * Barr-Stalfort Co., Niles, Ill. tCommercial Solvents Corp., New York, N.Y. •National Starch Corp., New York, N.Y. 125