Propyl alcohol viscosity

The fractionation of cellulosic materials dispersed in cuprammonium solution has usually been accompanied by an amount of degradation sufficient to render the results questionable. However, Battista and Sisson, " using acetone and n-propyl alcohol as precipitants, were able to resolve viscose rayon yam (D.P. 490) dispersed in cuprammonium solution into fractions varying in average degree of polymerization from 535 to 142, and from 615 to 132, respectively. 

A 0.032-m-diameter tube is used to condense n-propyl alcohol at atmospheric pressure. If the cooling water inside the tube keeps the pipe outside at 25°C, contrast the amounts of condensation using vertical or horizontal tubes. Condensation temperature of the alcohol is 97.8°C. Alcohol properties at 43.3°C are density of 779 kg/m, of 0.17 W/m °K, X of 687 kJ/kg, and viscosity of 1.4 x 10 kg/m sec. 

Properties Water-white liquid. The commercial material consists of a mixture of methyl propyl and diethyl ketones in the approximate ratio of 3 1 and contains at least 97% of these ketones, the balance being sec-amyl alcohol. D 0.809 (20/20C), fp -77.5C,bp 101.7C, refr index 1.3895 (20C), viscosity 0.473 cP (25C), flash p 45F (7.22C), autoign temp 941F (505C). Soluble in alcohol and ether slightly soluble in water. 

Isopropyl ocetote is a wofer-whife pleosont-odored liquid with properties intermediote between ethyl and butyl acetates. It is miscible with most of the common organic solvents such os alcohols, ketones, esters, oils, hydrocarbons, etc., and it is a solvent for nitrocellulose, cellulose ocetate (of low viscosity) and a wide ronge of oils, fats, waxes, gums ond notural and synthetic resins. Like n-propyl ocetote, its solvent power for cellulose esters is increosed when lower aliphatic alcohols are added. It is largely used in the lacquer industry where its slow evaporation rate and blush resistance ore of importance. It is also used in the monufacture of plastics, artificial leather, dopes, films, cements, and in the recovery of acetic ocid from aqueous solutions. 

The amine fimctional aciylic is used to disperse the pigment. Levelling and slip additives are also added to the grind resin. Thin to spray viscosity in a 4 3 2 3 blend of xylene di-acetone-alcohol isobutanol methoxy propyl acetate. 

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