Plasticizers glycerin

Depending on properties of the manufactured products, plasticizers must fiilfil a number of secondary functions. Gloves shown in Figures 14.6 and 14.7 are manufactured for medical applications thus they require q suitable plasticizer. Glycerin is used as q plasticizer similar to pharmaceutical caplets, which make use of either glycerin or sorbitol. In the case of caplets drag release properties are important. " In food contact apphca-tion of gloves diisononyl phthalate is rrsed as a plasticizer approved for food contact... 

Most frequently starch is used to modify polythene (113) - a film material which is usually used for short-term applieation. Thermo-softening mixes of synthetic polymer with starch are received by using, as a rule, starch, plasticized glycerin and water. Biodecomposition is promoted usually by use of additives of small quantities of piooxidizers. For example, such composition is 113 - starch - vegetable oil. [3]... 

The big picture in this case focuses mainly on the ability to plasticize these water-soluble polymers in the desired manner. Many plasticizers have been used and reported for both PVA and cellulose binders, but the vast majority fall into the category of Type II plasticizers. Glycerin and various glycols have been reported, and seen by the authors, to be very effective lubricants in the water-soluble tape casting systems. The earlier section on plasticizers, however, pointed out that while a Type II plasticizer is desired in some cases, the mandatory plasticizing agent found in all tapes is the Type I plasticizer or binder solvent. The requirements of a Type I plasticizer are solution of the binder polymer and low volatility. Water-soluble binders are plasticized (Type I) by water, which satisfies both of these criteria. 

Examples of plasticizers include adsorbed water and ethylene glycol for vinyl binders, stearic acid and oleic acid for wax binders, glycerine and ethylene glycol for clay bodies, and molten oils and waxes for thermoplastic polymers used in injection mol ding. 

An aqueous base is the least expensive vehicle and poses no toxicity problems. A solution of the drug in water or water and cosolvent is made. Glycerin, glycols, natural and synthetic gums, and/or polymers are used to increase viscosity, cohesiveness, and plasticity. To overcome syneresis, or water separation in the gel, a common problem with aqueous bases, one can use absorbing materials such as microcrystalline cellulose, kaolin, colloidal silicon dioxide, starch, etc. 

Bisphenol A may be replaced in prepn of epoxies by other diphenols, glycols or glycerine, but the resulting resins are of limited utility. The term " epoxy plastic is also sometimes used for other types of high. mol wt compds that contain the epoxy group —C—O—C—, or... 

Because of the hazardous nature of anhydrous hydrogen fluoride, adequate precautions should be taken to protect the head, eyes, and skin. Use of rubber gloves, an apron, and a plastic face mask is strongly recommended. All operations should be carried out in a hood. After completion of the reaction, all equipment should be washed with liberal quantities of water. A bottle containing magnesium oxide paste in glycerin should be available... 

Plasticizer Used as component of film coating solutions to enhance spread of coat over tablets, beads, and granules Diethyl phthalate, glycerin... 

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