Isopropyl alcohol

About: Isopropyl alcohol is a research topic. Over the lifetime, 3064 publications have been published within this topic receiving 27354 citations. The topic is also known as: Rubbing Alcohol & Propan-2-ol.

Colloidal solution for nanoparticles of metal, metal-polymer nano-composites and method of production of such composites

Abstract: FIELD: production of anti-bacterial and sterilizing substances, conducting adhesives and inks and protective screens of graphical displays. ^ SUBSTANCE: proposed colloidal solution is prepared through dissolving the metal salt and water-soluble polymer in water and/or nonaqueous solvent. Then, reaction reservoir with solution thus obtained is blown with gaseous nitrogen or argon and is subjected to radioactive radiation, after which solution is additionally diluted and treated with ultrasound. Used as metal salt is silver salt, for example nitrate, perchlorate, sulfate or acetate. Use may be also made of nickel, copper, palladium or platinum salt. Used as polymer is poly vinyl pyrrolidone, copolymer of 1-vinyl pyrrolidone with acryl or vinyl acetic acid, with styrene or vinyl alcohol. Used as nonaqueous solvent is methanol, ethanol, isopropyl alcohol or ethylene glycol. In production of metal-polymer nano-composites, use may be made of polymer stabilizer, for example, polyethylene, polyacrylonitrile, polymethyl methocrylate, polyurethane, polyacrylamide or polyethylene glycol instead of water-soluble polymer. In this case, surfactant may be additionally introduced into reaction reservoir for obtaining the emulsion. Solution remains stable for 10 months at retained shape of particles and minor increase of their size. Freshly prepared colloidal solution contains nano-particles having size not exceeding 8 nm. ^ EFFECT: smooth distribution of nano-particles of metal in polymer. ^ 24 cl, 13 dwg, 1 tbl, 7 ex

Effect of additives on the initial stage of emulsion polymerization of styrene (St) using poly(vinyl alcohol) as a protective colloid

Abstract: To realize the mechanism of particle formation followed by the grafting of styrene (St) onto poly(vinyl alcohol) (PVA) more precisely, we investigated the influence of additives on model experiments of emulsion polymerizations in 1 ml styrene (St) per 100 ml water at 70 °C using PVA as a protective colloid. In the case of a standard system without additive, experimental results indicate new particle formation, and that 30% of St feed and 30% of the PVA used were grafted. The sulfate radical seldom enters into particles but reacts with PVA, forming the PVA radical that yields the grafting of St onto PVA. The experimental results are thought to arise from a hydrogen abstraction from PVA with a sulfate radical. The addition of low-molecular-weight alcohol, such as isopropyl alcohol (i-PrOH) and n-propyl alcohol (n-PrOH), strongly affected the mechanism of particle formation in terms of a decrease in grafting, due to competition between hydrogen abstraction from PVA and the alcohols with a sulfate radical. Surprisingly, the addition of a low-reactive alcohol, such as t-butyl alcohol (t-BuOH), also resulted in the particle formation with a decrease in grafting, influenced the polymerization locus to be a monomer droplets dispersed by t-BuOH, and confirmed homogeneous nucleation with the increase in the solubility of St in the aqueous phase.

Corrosion inhibitor for metal and method for producing the same

Abstract: PURPOSE: A corrosion inhibitor for metal and a method for manufacturing the same are provided to remove separate surface treatment processes and to manufacture corrosion inhibitor which does not include heavy metal. CONSTITUTION: A method for manufacturing corrosion inhibitor for metal comprises following steps. Alcohol solution mixed with water is mixed with acrylic copolymer and emulsion solution is manufactured(S11). Tannic acid or gallate are added in the mixture of water, isopropyl alcohol, and acetic acid, so rust conversion solution is manufactured(S12). The rust conversion solution is decentralized into the emulsion solution(S13).

Solvent composition comprising mixture of polyfluoroalkane and lower alcohol

Abstract: A solvent composition comprising a mixture of at least one polyfluoroalkane and at least one lower alcohol, wherein the polyfluoroalkane is selected among those represented by the general formula (1): (CF3)2CF-R, wherein R represents a fluorinated ethyl group substituted by 1 to 4 fluorine atoms, and the lower alcohol is selected from the group consisting of methyl, ethyl, n-propyl and isopropyl alcohol.

Oligomeric betanine type foam drainage agent and preparation method

Abstract: The invention relates to an oligomeric betanine type foam drainage agent for foam drainage gas recovery in the later period of oil and gas well development and a preparation method. The agent can improve the foaming performance and stability of a foaming agent in electrolytes and hydrocarbons. The technical scheme is as follows: the chemical name of the foam drainage agent is N,N,N''-alkyl sodium diethyletriaminepentaacetate named NDDTP; firstly, sodium hydroxide and an isopropyl alcohol aqueous solution are added to a three-neck bottle, and the solution is stirred for dissolution; then diethylenetriaminepentaacetic acid is added, the mixture reacts at the temperature of 65-75 DEG C for 15 min, and an intermediate product,namely, sodium diethylenetriaminepentaacetate, is obtained; then a bromoalkanol solution is added to the intermediate product solution while stirring, and the mixture reacts at the temperature of 75-85 DEG C for 6-8 h; finally, a coarse product is obtained through distillation of a reaction liquid, and a solid product is obtained through desalinzation with ethanol and recrystallization with acetone. A foam drainage solution is prepared through compound of the foam drainage agent and ethylene glycol, has good foaming performance and foam stability and is used for increasing gas recovery ratio.