zinc stearate


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zinc

 [zingk]
a chemical element, atomic number 30, atomic weight 65.37, symbol Zn. (See Appendix 6.) It is a trace element in the diet, a component of several enzymes, including DNA and RNA polymerases and carbonic anhydrase. It is abundant in red meat, shellfish, liver, peas, lentils, beans, and rice. A well-balanced diet assures adequate intake of zinc. Those who may suffer from zinc deficiency include persons on a strictly vegetarian diet and those who are on a high-fiber diet. In the latter case, the zinc is bound to the fiber and is eliminated in the feces without having been absorbed through the intestinal wall. Poor absorption of zinc also can occur in persons with chronic and severe bowel disease. The recommended daily intake is 12–15 mg for an adult. A severe deficiency of zinc can retard growth in children, cause a low sperm count in adult males, and retard wound healing. Signs of a deficiency include anorexia and a diminished sense of taste. An excessive intake of zinc (usually in those who work with the metal or breathe its fumes) can either cause pneumoconiosis or interfere with the body's use of copper and other trace elements, producing diarrhea, nausea, vomiting, and other signs of intestinal irritation.
zinc acetate a salt used as an astringent and styptic.
zinc chloride a salt used as a nutritional supplement in total parenteral nutrition and applied topically as an astringent and a desensitizer for dentin.
zinc oxide a topical astringent and skin protectant; also a sunscreen.
zinc stearate a powder of zinc in a compound with stearic and palmitic acids; used as a water-repellent skin protectant in dermatoses.
zinc sulfate a topical astringent for mucous membranes, especially those of the eye.
zinc undecylenate the zinc salt of undecylenic acid; it is a topical antifungal.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

zinc ste·a·rate

a zinc compound with variable proportions of stearic and palmitic acids; a water-repellent, protective agent used in powders and ointments in the treatment of eczema, acne, and other skin diseases.
Farlex Partner Medical Dictionary © Farlex 2012

zinc stearate

Zn(C18H35O2)2, a very fine smooth powder used as a nonirritating antiseptic and astringent for burns and abrasions.
See also: zinc
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Vegetable and petroleum waxes, calcium and zinc stearates, and silicone fluids.
Water-phobic additives such as lubricants (Zinc Stearate), talc and coupling agents commonly used in commercially available WPC can substantially reduce water absorption and improve its mechanical properties (Stark and Rowlands 2003, Botros 2003).
Nonsilicone agents include Econo-Spray paintable, Hi-Line spray paintable, dry powder with Teflon, dry waxy with Krytox, zinc stearate, neutral oil and lecithin.
It reacts with stearic acid, forms Zinc Stearate, which activates the vulcanization process.
Zinc stearate and EBS wax are commonly used in combination for lubricating wood-plastic formulations (Laver 1996).
* USP grade zinc stearate available in dust-free, environmentally friendly prill or pellet form is a versatile dispersion and processing aid that meets all USP guidelines for use in pharmaceutical products.
A similar coassembled morphology was proposed by Lund-berg and coworkers in the case of zinc stearate filled EPDM ionomers (8), (10).
This it accomplishes by: offering a wider operating window for contaminants such as ethylene vinyl alcohol copolymer (EVOH), moisture, and zinc stearate lubricants--thus allowing for a higher mix in recycle streams (in turn, reducing the environmental footprint of landfills); improving impact strength for wet blends (700 ppm water) and blends with lubricant; and reducing die buildup on manufacturing equipment as it helps to incorporate polar components into the polymer matrix--resulting in greater processing efficiency.
Zinc stearate is the most popular activator used today, necessarily formed in-situ for optimum effect.
Finally, MoldWiz INT-4082 is intended as a replacement For zinc stearate, the traditional internal mold release used in BMC and SMC formulations.
Loss ODAB 248 ODAB HC1 242 ODAB PTSA 271 ODAB stearate 272 ODAB [H.sub.2]S[O.sub.4] 202 ODAB Mel 235 ODAB MSA 256 Zinc stearate 405