Liquid composition of 2-Isopropyl-N,2,3-trimethylbutyramide and N-Ethyl-p-menthane-3-carboxamide, its preparation method and its applications as a cooling agent and flavor enhancer

摘要

Disclosed is a liquid composition containing N-Ethyl-p-menthane-3-carboxamide and 2-Isopropyl-N,2,3-trimethylbutyramide (popularly known as WS-3 and WS-23 respectively), its preparation and its applications as a cooling sensate and as a flavoring agent. The present invention provides a composition characterized in that it comprises N-Ethyl-p-menthane-3-carboxamide and 2-Isopropyl-N,2,3-trimethylbutyramide in a ratio by weight in the range of 60/40 to 30/70 with the corresponding crystallization point being below 15° C. Preferably a weight ratio of 52/48 to 42/58 is employed corresponding to a crystallization point below −20° C. Such compositions have the advantages of being liquid at room temperature, easy to use as a cooling agent or a flavoring agent with no need to melt the normally crystalline forms of 2-Isopropyl-N,2,3-trimethylbutyramide (melting point 62° C.) and N-Ethyl-p-menthane-3-carboxamide (melting point 98.7° C.). The liquid cooling compositions herein described not only saves handling time, but also simplifies manufacturing processes by eliminating the need for extensive dust control procedures and can be used in cold processes at room temperature. These liquid compositions are effective not just as cooling agents, but at low levels act as flavor and salt enhancers.