Abstract: A process for forming a doped oxide film suitable for doping a semiconductor wafer substrate material and composite article. A silicon tetra-alkoxide is reacted with a limited amount of water to produce a low molecular weight, soluble polyorganosiloxane. The polyorganosiloxane is subsequently admixed with a reactive dopant source to form a soluble metallosiloxane polymer. The metallosiloxane polymer is coated onto a semiconductor wafer substrate material to produce a metallosiloxane-wafer composite article. The composite article is heated to produce an impurity doped semiconductor wafer suitable for electronic applications.

Abstract: A process for forming a doped oxide film and a doped semiconductor suitable for electronic applications wherein a silicon tetraalkoxide is reacted with a limited amount of water to produce a low molecular weight, soluble polyorganosiloxane. The polyorganosiloxane is subsequently admixed with a soluble dopant element compound to form a homogeneous, polyorganosiloxane-dopant compound solution. The solution is coated onto a semiconductor wafer substrate material and heated to produce an impurity doped semiconductor wafer suitable for electronic application.

Abstract: A process for forming a doped oxide film and a doped semiconductor suitable for electronic applications wherein a silicon tetraalkoxide is reacted with a limited amount of water to produce a low molecular weight, soluble polyorganosiloxane. The polyorganosiloxane is subsequently admixed with a soluble dopant element compound to form a homogeneous, polyorganosiloxane-dopant compound solution. The solution is coated onto a semiconductor wafer substrate material and heated to produce an impurity doped semiconductor wafer suitable for electronic application.

Abstract: A tintable coating is applied to a transparent substrate such as a polycarbonate lens. The coating is made from a coating solution of (1) a further curable organopolysiloxane preferably made by hydrolyzing methacryloxytrimethoxy silane and vinyl triethoxy silane with phenylphosphonic acid, and an (2) organic solvent for the organopolysiloxane. The coating is cured, and azo dye applied to the cured coating, and the coating heated to provide a highly tinted coating without sacrificing scratch resistance.

Abstract: A tintable coating is applied to a transparent substrate such as a polycarbonate lens. The coating is made from a coating solution of (1) a further curable organopolysiloxane preferably made by hydrolyzing ethyl ortho silicate with methacryloxytrimethoxy silane and/or vinyltriethoxy silane with phenylphosphonic acid, and an (2) organic solvent for the organopolysiloxane. The coating is cured, an azo dye applied to the cured coating to provide a highly tinted coating without sacrificing scratch resistance. The cured coating can be tinted with an improved tinting speed and the resultant cured tinted coating has improved abrasion resistance.

Abstract: A process for forming organopolysiloxanes from trialkoxysilanes and the resulting resinous products are disclosed, characterized in that the organopolysiloxane resins have increased abrasion and solvent resistance with good shelf life. The organopolysiloxanes are formed by dual catalysts that operate preferably in sequence. Hydrolysis and condensation of the trialkoxysilanes are carried out in an aqueous solution and catalyzed by formic acid at a relatively high strength, such as an amount greater than 700 ppm. Cross-linking of the resulting partially condensed, curable organopolysiloxane is then catalyzed by a hydrocarbyl substituted ammonium hydroxide in which the hydrocarbyl substituent may be alkyl or alkenyl up to about 6 carbon atoms. The resinous products are especially useful as coating compositions.

Abstract: There is provided a coating process, and compositions for practicing the process, wherein organic polymeric substrates, and especially polycarbonates and acrylics, are coated with a coating composition which is curable in a short period of time to provide the substrate with a hard, abrasion-resistant, mar-resistant, chemical resistant and acetone-resistant, strongly adhered coating. The coating composition employs the use of effective cure promoting amounts of a methanol and lower alkyl alcohol-melamine-formaldehyde partial condensate reaction products which are added to organopolysiloxanes made from methyltrialkoxysilane, wherein the organopolysiloxanes are made by a prescribed technique; the alkoxy groups contain one to six carbon atoms and the alkyl alcohol is a C.sub.2 to C.sub.4 alkyl alcohol or mixtures thereof.