HIGHLY SUBSTANTIVE WATER-SOLUBLE UV ABSORBERS AND PROCESS FOR PREPARATION THEREOF
申请人:GALAXY SURFACTANTS LTD.
公开号:US20190343744A1
公开(公告)日:2019-11-14
Disclosed herein are water-soluble UV absorbing compounds of Formula I with two quaternary ammonium centers, wherein;
R is selected from saturated or unsaturated alkyl groups with C
12
to C
22
carbon atoms and R
1
is selected from H or methoxy group. The invention further discloses the synthesis of highly substantive water-soluble UV absorbers containing two quaternary ammonium centers, cinnamidopropyl (2-hydroxypropyl alkyl dimethyl ammonium chloride) dimonium chlorides of Formula I and the compositions containing the same in personal care products.
A Convenient Synthesis of Quaternary Ammonium Gemini Surfactants from Long-Chain Alkyldimethylamines and Epichlorohydrin
作者:R. J. Grau、C. G. Ricci、M. I. Cabrera、J. A. Luna
DOI:10.1055/s-2002-34876
日期:——
an excellent reaction medium for the selective synthesis of bis-quaternaryammoniumsalts 5a-c from epichlorohydrin 2 and long-chain alkyldimethylamines la-c, in the presence of the corresponding amine chlorohydrates 3a-c as functional surfactants. Unlike alcohol or alcohol-water mixtures as reaction medium, mono-quaternary ammoniumsalts 4a-c were formed, if any, in very small amounts under micellar