Abrasive-polishing agent

Abrasive-Polishing Agent. Both silica gels and precipitates are found as abrasives (as well as thickeners) in toothpaste. Silicas are especially useful in the production of clear gel-type toothpastes, because it is possible to match the index of refraction of the liquid components of the formulation to that of the silica to provide the desired level of abrasivity while retaining the transparency of the toothpaste. This cannot be done with conventional abrasive agents, such as calcium carbonate. 

Abrasive-polishing agent, use of silica gels and precipitated silicas, 625 Abrasive powder, preparation, 426, 427f Acetic acid, catalysis of silica sol-gel precursor hydrolysis, 406, 407t, 408/ Acid-neutralization manufacturing method for silica sol, procedure, 53, 54/... 

Tripoh is a mild abrasive and polishing agent from porous rocks near TripoH. 

Zirconium siUcate [10101 -52-7] is a polishing agent with the unique characteristic of gradually reducing its abrasive capabiUty during use. Its high coarseness when first appHed permits it to cut rapidly. 

Fillers. Diatomite mineral fillers are used primarily (/) where bulk is needed with minimum weight increase, (2) as an extender where economy of more expensive ingredients is a factor, or (3) where the stmcture of the particle is important. In other appHcations, diatomite can add strength, toughness, and resistance to abrasion, or it can act as a mild abrasive and polishing agent (see Abrasives). 

Use Polishing agent in dentrifices, mild abrasive for metal polishing, nutrient and dietary supplement. 

Use Concrete aggregate, heat and sound insulation, filtration, finishing glass and plastics, road construction, scouring preparations, paint fillers, absorbents, support for catalysts, dental abrasive, abherent for uncured rubber products, possible substitute for asbestos, polishing agent for pedicures. 

MAJOR PRODUCT APPLICATIONS paints, coatings, rubber, abrasive polishes, cleaning waxes, seed coatings, anticaking agent, antiblock applications, pesticide formulations, asphalt extender, automotive windshields, catalyst support, concrete additive, dental molds, drilling mud, filter papers and pads, specialty p ers, paperboard, foundry, waste disposal aids, stucco, battery boxes, plastic film... 

Polyethylenes of lower molecular mass are added as slip and matting agents to paints and printing inks and can also produce dirt-repellent and abrasion-resistant effects. The wax dispersions are produced by hot dissolution and precipitation in aromatic hydrocarbons. This is not necessary with commercial microcrystalline grades. Aqueous dispersions of polyethylene are important as polishing agents. 

Dicalcium phosphate dihydrate, CaHP04 2H2O, was introduced into toothpaste over 70 years ago as a mild abrasive and polishing agent to replace calcium carbonate. 

Crocus cloth n. An iron-oxide coated abrasive cloth, used as a polishing agent after most of the work has been done with emery or aluminum oxide, capable of giving a mirror-hke finish to metal. 

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