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1 Synthesis of Triethanolamine (TEA) Stearic/Oleic Methosulphate Esterquats and their applications Key Words TEA Stearic/Oleic Methosulphate Esterquat, Plant-based, Home Care, Fabric Conditioners, Fabric Softeners, Softness Executive Summary Triethanolamine (TEA) Stearic/oleic Methosulphate Esterquat is a new plant-based ingredient developed by Croda, Inc. The synthesis method, properties of the quat and its application for home care formulations is disclosed within. Background Triethanolamine (TEA) Stearic/oleic Methosulphate Esterquat is synthesized using fatty acids stearic & oleic acid mixture as the reactants. These raw materials are plant-based. Different stearic to oleic acid ratios, 50:50, 60:40, 70:30 & 80:20, underwent esterification reaction with triethanolamine followed by quaternization with dimethyl sulphate. The reaction scheme is illustrated in diagram 1. Diagram 1 HO N OH OH O N OH O R2 O O R1 R1 O OH R2 OH OH 170-175Deg. R1 = Stearic Acid R2 = Oleic Acid Fatty Acids Triethanol Amine TEA Stearate/Oleate - 2 H2O Dimethyl Sulphate O N OH O R2 O O R1 CH3 CH3SO4 (CH3)2SO4 TEA Stearate/Oleate Methosulphate Quat 2 Physical properties of the resulting esterquats were illustrated in Table 1. Table 1: Physical properties of esterquats synthesized from TEA and different ratios of stearic and oleic acids Parameters TEA Stearic/Oleic (50:50) Methosulphate Esterquat TEA Stearic/Oleic (60:40) Methosulphate Esterquat TEA Stearic/Oleic (70:30) Methosulphate Esterquat TEA Stearic/Oleic (80:20) Methosulphate Esterquat Appearance Yellow paste White paste White solid mass White solid mass pH (5% IPA/Water) 2-4 2-4 2-4 2-4 Base value Below 15 Below 15 Below 15 Below 15 Cationic content 60 -70 60 -70 60 -70 60-70 % active content 99 max. 99 max. 99 max. 99 max. Based on market requirements favouring lighter colour and...