Patent ID: 6017389
Filing Date: 2000-01-25
Classification: B01D,C03B,C03C,C04B,Y10T

Abstract:
A process for the production of a thin SiO.sub.2 film which comprises:hydrolysis and condensation of(a) 40 to 100% by weight of one or more silanes of general formula (I)R.sub.x --Si--A.sub.4-x (I)whereinthe radicals A are the same or different and represent hydroxyl groups or hydrolytically removable groups,the radicals R are the same or different and represent hydrolytically non-removable groups, andx is 0, 1, 2, or 3, provided that x.gtoreq.1 in at least 70% by moles of said silanes;optionally in the presence of(b) 0 to 50% by weight of colloidal SiO.sub.2 and/or(c) 0 to 10% by weight of an organic binder; processing the resulting viscous sol into a gel film, and heat-treatment of said gel film.