Synthetic gums

Synthetic gas Synthetic gaseous fuel Synthetic glasses Synthetic gums... 

Terpene resins, because of their low odor and acceptable FDA clearance, are used as tackifiers for the natural and synthetic gum bases used in chewing gum. Selected petroleum resins are also used as gum bases. 

Like the lower alcohols, amyl alcohols are completely miscible with numerous organic solvents and are excellent solvents for nitrocellulose, resia lacquers, higher esters, and various natural and synthetic gums and resius. However, iu contrast to the lower alcohols, they are only slightly soluble iu water. Only 2-methyl-2-butanol exhibits significant water solubiUty. As associated Hquids, amyl alcohols form a2eotropes with water and//or a variety of organic compounds (Table 3). 

Because the viscosity of neoprene latex at a given soHds content is less than that of natural mbber latex, thickeners are generally needed with the former. MethylceUulose and the water-soluble salts of poly(acryhc acid) are the two most commonly used thickeners. Natural and synthetic gums are also used. 

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. 

Synthetic gums Carbomer 934 Anionic 0.5-1 Soluble in water 5-11 Plastic Incompatible with cationic polymers, strong acids and high levels of electrolytes... 

Spensol D(a soln of AN 60, NH 34 water 6% may be substituted for the Driver s Liquid, and water-sol high- mol-wt natural or synthetic gums may be added as thickeners]... 

INTEX ANTIMIGRANT 75 is an excellent antimigrant for thermosol dyeing. It reduces the migration of disperse, vat pigment and pigment dyes. It reduces side to side and back to face shading. It is synthetic gum that has very little tendency to build up on rolls or cans. 

U.S. 4260528 (1981) [125] Fox et al. (Lever Bros.) Natural or synthetic gum thickener, urea and polyhydric alcohol Good viscosity and flow control... 

Believing that the chemical modification of natural biopolymers could produce materials having many of the physical properties desired for technical applications, he pursued structural studies of synthetic gums, such as the dextrins from pyrolysis of starch (with G. M. Christensen,... 

Synonyms Cellulose carboxymethyl ether Classification Synthetic gum... 

Synonyms Cellulose carboxymethyl ether Classification Synthetic gum Toxicology LD (oral, rat) > 5 g/kg LD50 (IV, mouse) 47 mg/kg shown to cause cancer in animals when ingested toxicity on skin not known may cause immune responses TSCA listed... 

Inc.], US), and is used in various personal care products. It has rheological properties, and unlike most natural and synthetic gums, has high thermal stability, is resistant to hydrolysis and retains skin moisture. 

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