US4707383A — Process for coating glass with a film of tin oxide

Claim 1

Independent Claim 161 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; mixing a predetermined amount of finely divided particles of a dry, pyrolytically decomposable organic tin oxide having a particle size of not greater than about 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate with a predetermined amount of a dry dibutyl tin halogen containing compound in powder form, said compound selected from the group dibutyl tin difluoride, dibutyl tin ammonium tetrafluoride and dibutyl tin trifluoroacetate; suspending said dry powder mixture in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture and carrier gas onto said heated substrate; and pyrolytically decomposing said powder mixture upon the surface of the heated substrate to form an adherent coating of tin oxide thereon.

Claim 2

Dependent Claim 161 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; mixing a predetermined amount of finely divided particles of a dry, pyrolytically decomposable organic tin oxide having a particle size of not greater than about 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate with a predetermined amount of a dry dibutyl tin halogen containing compound in powder form, said compound selected from the group dibutyl tin difluoride, dibutyl tin ammonium tetrafluoride and dibutyl tin trifluoroacetate; suspending said dry powder mixture in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture and carrier gas onto said heated substrate; and pyrolytically decomposing said powder mixture upon the surface of the heated substrate to form an adherent coating of tin oxide thereon.

Claim 3

Dependent Claim 12 words

The process of claim 1 wherein the organotin powder is dibutyltin oxide.

Claim 4

Dependent Claim 15 words

The process of claim 1 wherein the anhydrous gas carrier is dry air or nitrogen.

Claim 5

Dependent Claim 35 words

The process of claim 1 wherein the amount of said organotin powder is about 20 to 65 weight percent and the amount of dibutyl tin halogon containing compound is about 35 to 80 weight percent.

Claim 6

Dependent Claim 138 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent, a dry self-doping dibutyl tin halogen containing powder selected from the group dibutyltin difluoride, dibutyltin ammonium tetrafluoride and dibutyltin trifluoroacetate said powder having a particle size of not greater than about 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; projecting said suspended powder onto the surface of said heated substrate; and pyrolytically decomposing said dibutyl tin halogen containing powder on contact with the surface of the heated substrate to form an adherent coating of tin oxide on said surface.

Claim 7

Dependent Claim 138 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent, a dry self-doping dibutyl tin halogen containing powder selected from the group dibutyltin difluoride, dibutyltin ammonium tetrafluoride and dibutyltin trifluoroacetate said powder having a particle size of not greater than about 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; projecting said suspended powder onto the surface of said heated substrate; and pyrolytically decomposing said dibutyl tin halogen containing powder on contact with the surface of the heated substrate to form an adherent coating of tin oxide on said surface.

Claim 8

Dependent Claim 15 words

The process of claim 5 wherein the anhydrous carrier gas is dry air or nitrogen.

Claim 9

Dependent Claim 176 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; mixing an amount of from about 20 to 65% by weight of a dry, finely divided pyrolytically decomposable organic tin oxide powder having a particle size of not greater than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate with from about 35 to 80% by weight of a dry organic tin halogen containing compound in powdered from said compound selected from the group dibutyltin difluoride dibutyltin ammonium tetrafluoride and dibutyltin trifluoroacetate; suspending said mixture in an anydrous gas carrier in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture and gas carrier onto the heated surface of said substrate; and pyrolytically decomposing said powder mixture upon the surface of the heated substrate to form an adherent coating of between 80 and 700 nm of tin oxide on said surface.

Claim 10

Dependent Claim 176 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; mixing an amount of from about 20 to 65% by weight of a dry, finely divided pyrolytically decomposable organic tin oxide powder having a particle size of not greater than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate with from about 35 to 80% by weight of a dry organic tin halogen containing compound in powdered from said compound selected from the group dibutyltin difluoride dibutyltin ammonium tetrafluoride and dibutyltin trifluoroacetate; suspending said mixture in an anydrous gas carrier in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture and gas carrier onto the heated surface of said substrate; and pyrolytically decomposing said powder mixture upon the surface of the heated substrate to form an adherent coating of between 80 and 700 nm of tin oxide on said surface.

Claim 11

Dependent Claim 14 words

The process of claim 7 wherein the organic tin oxide powder is dibutyltin oxide.

Claim 12

Dependent Claim 140 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent, a dry, self-doping dibutyl tin halogen containing powder selected from the group dibutyl tin difluoride and dibutyltin ammonium tetrafluoride, dibutyltin trifluoroacetate said powder having a particle size of less than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; projecting said suspended powder upon said heated substrate; and pyrolytically decomposing said dibutyl tin halogen containing powder on contact with the surface of the heated substrate to form an adherent coating of between 80 and 700 nm of tin oxide on said surface.

Claim 13

Dependent Claim 140 words

A process for forming a coating of tin oxide on the surface of a transparent refractory substrate material which comprises: heating the substrate material to a temperature of from about 400° to 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent, a dry, self-doping dibutyl tin halogen containing powder selected from the group dibutyl tin difluoride and dibutyltin ammonium tetrafluoride, dibutyltin trifluoroacetate said powder having a particle size of less than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; projecting said suspended powder upon said heated substrate; and pyrolytically decomposing said dibutyl tin halogen containing powder on contact with the surface of the heated substrate to form an adherent coating of between 80 and 700 nm of tin oxide on said surface.

Claim 14

Dependent Claim 15 words

The process of claim 9 wherein the anhydrous carrier gas is dry air or nitrogen.

Claim 15

Dependent Claim 125 words

A process for forming a coating of tin oxide on the surface of a glass substrate which consists essentially of: heating the glass to between 400° and 650° C.; mixing from 20 to 65% by weight of finely divided particles of dibutyltin oxide powder having a particle size of not greater than about 20 microns with from 35 to 80% by weight of a dibutyltin difluoride powder; suspending said powder mixture in dry air or nitrogen in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture onto the surface of the heated glass; and pyrolytically decomposing said powder mixture on contact with the surface of the heated glass to form an adherent coating of tin oxide on said surface.

Claim 16

Dependent Claim 125 words

A process for forming a coating of tin oxide on the surface of a glass substrate which consists essentially of: heating the glass to between 400° and 650° C.; mixing from 20 to 65% by weight of finely divided particles of dibutyltin oxide powder having a particle size of not greater than about 20 microns with from 35 to 80% by weight of a dibutyltin difluoride powder; suspending said powder mixture in dry air or nitrogen in the absence of a fluoride containing gas or an organic solvent; projecting said powder mixture onto the surface of the heated glass; and pyrolytically decomposing said powder mixture on contact with the surface of the heated glass to form an adherent coating of tin oxide on said surface.

Claim 17

Dependent Claim 117 words

A process for forming a coating of tin-oxide on the surface of a glass substrate which consists essentially of: heating the glass to between 400° and 650° C.; suspending in dry air or nitrogen in the absence of a fluoride containing gas or an organic solvent a dry self-doping organic tin fluoride powder of dibutyl tin difluoride, dibutyl tin ammonium tetrafluoride and dibutyl tin trifluoroacetate, said powder having a particle size of less than about 20 microns; projecting said suspended powder onto the surface of said heated substrate; and pyrolytically decomposing said self-doping organic tin fluoride powder on contact with the surface of the heated substrate to form an adherent coating of tin oxide on said surface.

Claim 18

Dependent Claim 117 words

A process for forming a coating of tin-oxide on the surface of a glass substrate which consists essentially of: heating the glass to between 400° and 650° C.; suspending in dry air or nitrogen in the absence of a fluoride containing gas or an organic solvent a dry self-doping organic tin fluoride powder of dibutyl tin difluoride, dibutyl tin ammonium tetrafluoride and dibutyl tin trifluoroacetate, said powder having a particle size of less than about 20 microns; projecting said suspended powder onto the surface of said heated substrate; and pyrolytically decomposing said self-doping organic tin fluoride powder on contact with the surface of the heated substrate to form an adherent coating of tin oxide on said surface.

Claim 19

Dependent Claim 181 words

A process for forming a coating of tin-oxide on the surface of a glass substrate comprising: heating the glass substrate to a temperature of between about 400° and 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent a self doping organotin compound of the formula: [R.sub.a X.sub.b Sn].sub.c O.sub.d wherein R is an alkyl, aryl, alkylaryl or aralkyl radical; X is a halogen; a or b is 0,1,2,3, or 4 c is 1 or 2; and d is 0 or 1; such that when c=1 and d=0, a+b=4; when c=1 and d=1 a=b=2, and when c=2 and d=1, a+b=3; said compound in the form of a powder having a particle size of not greater than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; and projecting said suspended powder compound onto the surface of the heated substrate so as to pyrolytically decompose the compound upon contact with the heated glass, thus forming an adherent coating of tin oxide upon the surface of the glass.

Claim 20

Dependent Claim 181 words

A process for forming a coating of tin-oxide on the surface of a glass substrate comprising: heating the glass substrate to a temperature of between about 400° and 650° C.; suspending in an anhydrous gas carrier in the absence of a fluoride containing gas or an organic solvent a self doping organotin compound of the formula: [R.sub.a X.sub.b Sn].sub.c O.sub.d wherein R is an alkyl, aryl, alkylaryl or aralkyl radical; X is a halogen; a or b is 0,1,2,3, or 4 c is 1 or 2; and d is 0 or 1; such that when c=1 and d=0, a+b=4; when c=1 and d=1 a=b=2, and when c=2 and d=1, a+b=3; said compound in the form of a powder having a particle size of not greater than 20 microns and being pyrolytically decomposable at a temperature below that of the heated substrate; and projecting said suspended powder compound onto the surface of the heated substrate so as to pyrolytically decompose the compound upon contact with the heated glass, thus forming an adherent coating of tin oxide upon the surface of the glass.

Claim 21

Dependent Claim 10 words

The process of claim 13 wherein the halogen is fluorine.

Claim 22

Dependent Claim 15 words

The process of claim 13 wherein the self doping organotin compound is dibutyl tin difluoride.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-11-16	1991-05-18	1991-11-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-11-16	1995-05-18	1995-11-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-11-16	1999-05-18	1999-11-17	$7700.00	Window Closed / Lapsed

Process for coating glass with a film of tin oxide

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag