Patent ID: 7276181
Filing Date: 2007-10-02
Classification: C03C

Abstract:
1. A glass etching composition comprising from 1 to 20 w/v % of a fluoride selected from the group consisting of sodium fluoride, potassium fluoride, ammonium fluoride, sodium bifluoride, potassium bifluoride, ammonium bifluoride, ammonium borofluoride and ammonium silicofluoride, from 20 to 80 v/v % of water selected from the group consisting of tap water, ion-exchanged water, distilled water, pure water, ground water, spring water, filtered water or a mixture thereof, from 20 to 80 v/v % of at least one organic solvent miscible with water, selected from the group consisting of glycerin, a glycol selected from methyl glycol, ethyl glycol, methylene glycol, ethylene glycol, propylene glycol, dimethylene glycol, diethylene glycol, dipropylene glycol, polymethylene glycol and polyethylene glycol, a glycol ether selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoisopropyl ether and dipropylene glycol monobutyl ether, and an alcohol selected from methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 1,2-ethane diol, 1,2-propane diol, 1,3-propane diol, 1,4-butane diol, 1,2,3-propane triol, 1,2,6-hexane triol and sorbitol, and 1-10 v/v % of at least one inorganic acid selected from the group consisting of hydrochloric acid, sulfuric acid and nitric acid.