The effect of surface-active agents on the properties of lead chromates was written by Ermilov, P. I.;Fedorov, V. N.. And the article was included in Lakokrasochnye Materialy i Ikh Primenenie in 1964.Synthetic Route of C9H13NO2S This article mentions the following:
The effect of anionic, cationic, and nonionic surface-active agents (I) on the properties of Pb chromates was investigated. To synthesize 100 g. of nitric Pb chromates, 69.5 g. PbO, 19.6 g. HNO3, 37.4 g. Na2Cr2O7, and 2.54 g. H2SO4 were used. In all experiments, the precipitation and crystallization were conducted at 25° with thorough agitation. I (0.1-3.5% based on dry chromate) were introduced during the dissolving of PbO in HNO3. After washing and filtration, one part of the chromate was dried at 80° to 1% residual moisture content. The other part, containing 40-45% moisture, was mixed with raw linseed oil (II) for 4-5 min. The separated H2O was decanted, a fresh portion of raw II was added, and the mixture agitated to a constant moisture content. A purified Na octylbenzenesulfonate (III), and Duomeen T dioleate, [RNH2C3H6NH3] [C17H33COO], were used as anionic I. Katamine A, [RC6H4CH2N+Et3]Cl–, and preparation BSA, RC6H4SO2NHCHMe2, were used as cationic I. As nonionic I, OP-4, C8H17C6H4O(CH2CH2O)4H, and TB-7, tritert-butylphenol, were employed. Analyses of the resulting chromates showed that I have no effect on the chem. composition or on the completeness of reaction of the chromates. In all cases, the chromate contained 27.2-28.0% CrO3, 68.4-69.0% PbO, and 0.3-0.4% H2O-soluble salts. The light fastness of all samples containing I was good. Anionic and nonionic I, used in amounts of 0.25-0.50% (based on the weight of the chromate), noticeably inhibit the crystal growth, thus increasing the dispersibility of the pigment. When the amount of I is increased, their effectiveness decreases. Anionic I (0.25%) decrease the oil absorption of the chromate from 17 to 9-11 g./100 g. Nonionic I, especially TB-7, decrease the oil absorption slightly, while cationic I increase it. The hiding power of the pigment is improved with I. Especially effective are 0.25% III, 1% Duomeen T, 1% OP-4, and 0.25% TB-7. All of the investigated I, except Katamin A and OP-4, reduce the moisture content of the chromate to 6.5-6.8% after agitating the wet pigment for 7-9 min. with raw II. This eliminates the necessity of drying and crushing the pigment and speeds up the grinding process. In the experiment, the researchers used many compounds, for example, N-Isopropylbenzenesulfonamide (cas: 5339-69-5Synthetic Route of C9H13NO2S).
N-Isopropylbenzenesulfonamide (cas: 5339-69-5) belongs to amides. The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds. Tertiary amides, with the important exception of N,N-dimethylformamide, exhibit low solubility in water. As a result of interactions such as these, the water solubility of amides is greater than that of corresponding hydrocarbons. These hydrogen bonds are also have an important role in the secondary structure of proteins.Synthetic Route of C9H13NO2S
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics