Compositions for polishing synthetic resin
AssigneeFujimi Kenmazai Kogyo Co., Ltd.
InventorsIsamu Koshiyama, Tetsuji Senda
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Abstract
A composition for polishing synthetic resin comprises a calcined alumina polishing agent and water. The polishing agent is prepared by burning boehmite, crushing it into particles and separating particles having a predetermined particle distribution. Also disclosed is a synthetic resin polishing composition further containing as a polishing accelerator an aluminum compound selected from among aluminum nitrate, polyaluminum chloride, aluminum bromide, aluminum sulfate, aluminum iodide, aluminum chloride and aluminum phosphate and mixtures thereof.
Claims36
An aqueous composition for polishing synthetic resin consisting essentially of a slurry of about 5 to 50% by weight of a polishing agent consisting of calcined boehmite of a particle size of about 20 microns or less and having a particle size distribution of about 5.5% being 3 microns and larger, about 7.0% being less than 3 microns and greater than 2 microns, about 15.0% being 2 microns and smaller dispersed or slurried in water but greater than 1 micron, and about 72.5% being about 1 micron and smaller.
In a process of polishing an article formed of synthetic resin with an aqueous polishing composition comprising an aqueous slurry of a polishing agent applied between the article and a polishing pad which is slideable on the article, the improvement comprising utilizing an aqueous polishing composition consisting essentially of a slurry of about 5 to 50% by weight of a polishing agent consisting of calcined boehmite of a particle size of about 20 microns or less and having a particle size distribution of about 5.5% being 3 microns and larger, about 7.0% being less than 3 microns and greater than 2 microns, about 15.0% being 2 microns and smaller but greater than 1 micron, and about 72.5% being about 1 micron and smaller dispersed or slurried in water.
Dependencies are inferred from the claim text.