2461-18-9Relevant articles and documents
Synthesis of a novel betaine-type asphalt emulsifier and its investigation by online FTIR spectrophotometry
Huai, Chunlei,Shi, Laishun,Li, Na
, p. 597 - 614 (2013)
A novel betaine-type asphalt emulsifier, 3-(dodecyloxy)-2-hydroxypropan-N- carboxymethyl-N,N-dimethylammonium chloride, has been synthesized in a three-step reaction from lauryl alcohol, epichlorohydrin, dimethylamine, and chloroacetic acid. The optimum reaction conditions were obtained for synthesis of 2-(dodecyloxymethyl)oxirane in the first step. The yield reaches 75.7 % under the optimum conditions of reaction temperature 50 C, reaction time 5 h, feedstock mole ratio of epichlorohydrin to lauryl alcohol 1.4, basicity 33.3 %. The structures of the three products were identified by FTIR. Synthesis of 2-(dodecyloxymethyl)oxirane in the first step was monitored by online FTIR, and an intermediate was detected. On the basis of the experimental data, a plausible reaction mechanism was proposed for the reaction. The critical micelle concentration (CMC) of the final product is low, 8.8 × 10-5 mol/L. The surface tension at the CMC is 21.2 mN/m. This product is an excellent emulsifier for asphalt. The prepared bituminous emulsion had high storage stability. The emulsifier is a rapid-set asphalt emulsifier.
DETERGENT FOR SKIN OR HAIR
-
Paragraph 0030, (2019/08/27)
PROBLEM TO BE SOLVED: To provide a skin detergent and a hair detergent having excellent foam quality, low skin irritation, and excellent stability at a low temperature. SOLUTION: A detergent for skin or hair contains a compound represented by general formula (1) (A), an anionic surfactant (B), and an ampholytic surfactant (C). R1OCH2CH-[O(AO)mH]-CH2O(AO)nH (1) [where R1 is a C4-18 monovalent hydrocarbon group; m+n AO independently represent an ethyleneoxy group or a propyleneoxy group; m and n independently represent an integer of 0 or greater; m+n is an integer of 1-50]. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
ANTIMICROBIAL AGENT CONTAINING POLYALKYLENEIMINE DERIVATIVE
-
, (2017/09/23)
The present invention is an antimicrobial agent containing a polyalkyleneimine derivative formed by adding a substituent group having a structure of a following Formula (1) to a nitrogen atom of polyalkyleneimine. [in-line-formulae]—CH2CH(OH)CH2—O—R1??(1)[/in-line-formulae] In the formula, R1 represents an alkyl group with 6 to 20 carbon atoms, an alkenyl group with 6 to 20 carbon atoms, an aryl group with 6 to 20 carbon atoms, or —(CH2CH2O)n—R2. R2 represents an alkyl group with 6 to 20 carbon atoms, an alkenyl group with 6 to 20 carbon atoms, or an aryl group with 6 to 20 carbon atoms. n represents an integer of 1 to 50.
Synthesis, Surface and Antimicrobial Activities of Novel Cationic Gemini Surfactants
Ding, Zhaoyun,Fang, Shimin
, p. 1051 - 1057 (2015/11/18)
A series of novel cationic gemini surfactants [C n H2n+1-O-CH2-CH(OH)-CH2-N+(CH3)2-(CH2)2]2·2Br- [3a (n = 12), 3b (n = 14) and 3c (n = 16)] having a 2-hydroxy-1,3-oxypropylene group [-CH2-CH(OH)-CH2-O-] in the hydrophobic chain have been synthesized and characterized. Their water solubility, surface activity, foaming properties, and antibacterial activity have been examined. The critical micelle concentration (CMC) values of the novel cationic gemini surfactants are one to two orders of magnitude smaller than those of the corresponding monomeric surfactants. Furthermore, the novel cationic gemini surfactants have better water solubility and surface activity than the comparable [C n H2n+1-N+(CH3)2-(CH2)2]2·2Br- (n-4-n) geminis. The novel cationic gemini surfactants 3a and 3b also exhibit good foaming properties and show good antibacterial and antifungal activities.
