Tri acetin

A current example of the use of a polyester resin as a proplnt binder is the patd compn of Cohen and Scotoni (Ref 32b). In this formulation conventional polyester-olefinic copolymers are used (50,1) together with NG (42.5), tri-acetin (2.7), adiponitrile (2.7), PbO (0.5) and acetylsalicyKc acid (1.5%) to obtain 27 and 152mm caseless ammo... 

D. Zinc Reduction-Volumetric Procedure (Ref 3, Method 203-5). It is used for detg DEtPh. or DBuPh content of proplnts that do not contain interfering esters such as other phthalates, dimethyl sebacate, tri-acetin, or sucrose octaacetate... 

Other formulation parameters that may be used to modulate the release include the ratio (relative concentrations) of polymers in the case of incorporation of a mix of two or more polymers as primary coating material, the properties of the core material, and the amount of plasticizers used, which affects the strength of the coat. Plasticizers with low water solubility such as dibutyl sebacate, diethyl phthalate, tri-acetin, triethyl citrate, and acetylated monoglyceride result in delaying... 

The citric acid, if used, is dissolved in the tri-acetin by stirring, and using heat is necessary. 

What actually takes place is the alcoholysis [represented in Eqs. (8) and (9)], which was estimated by Gibby and Waters to be one thousand times as rapid as the saponification according to Eq. (7). Then the ethyl benzoate is saponified slowly. The greater rapidity of alcoholysis compared with hydrolysis may be shown qualitatively by a simple eiqieriment with tri-acetin. Some triacetin, CgHsCOCOCHt)) which is odorless, is added to a solution of sodium hydroxide in 50 per cent alcohol the odor of ethyl acetate is apparent at once and shows that the immediate reaction is the formation of ethyl acetate. On this accoimt, it is necessary to use an effi-cmnt reflux condenser when determining saponification numbers of even high-boiling acetates. ... 

Mr W.D. Field groups the solvents of pyroxyline into classes thus Two of the monohydric alcohols compound ethers of the fatty acids with monohydric alcohols, aldehydes simple and mixed ketones of the fatty acid series. These four classes inelude the greater number of the solvents of pyroxyline. Those not included are as follows —Amyl-nitrate and nitrite, methylene-di-methyl ether, ethidene-diethyl ether, amyl-chloracetate, nitro-benzene and di-nitro-benzene, eoumarin, eamphor, glacial acetic acid, and mono-, di-, and tri-acetin. 

Preparation of filters Membrane filters of CE are placed on clean microscope slides and left to a short burst of acetone vapor. Then the filter is cleared by collapsing the filter structure. A drop or two of tri-acetin is applied to the filter surface, and a cover slip is carefully placed on it. The filter is ready for evaluation after a brief period of warming. 

An oil containing tri-acetin gave the following results (Bennett) — ... 

Triacetin. See under Acetins A31-R Tri acetone Triperoxide. See under Acetone Peroxides A42-R Ttialkyls of Aluminum A144-R... 

---