US5800918A — Multilayered hydrophobic window glass

Claim 1

Independent Claim 151 words

A window glass comprising a substrate made of glass that is optionally covered, over at least a part, by one or more layers, and a coating comprising an essentially mineral sublayer and directly bonded thereto, a hydrophobic-oleophobic layer wherein the density of the mineral sublayer is equal to at least 80% of that of its constituent material, and wherein the mineral sublayer is selected from the group consisting of:Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 2

Dependent Claim 151 words

A window glass comprising a substrate made of glass that is optionally covered, over at least a part, by one or more layers, and a coating comprising an essentially mineral sublayer and directly bonded thereto, a hydrophobic-oleophobic layer wherein the density of the mineral sublayer is equal to at least 80% of that of its constituent material, and wherein the mineral sublayer is selected from the group consisting of:Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 3

Dependent Claim 19 words

A window glass according claim 1, wherein the hardness of the sublayer is greater than that of the glass.

Claim 4

Dependent Claim 17 words

A window glass according to claim 1, wherein the sublayer thickness is between 80 and 5000 Å.

Claim 5

Dependent Claim 24 words

A window glass according to claim 1, wherein the density of the sublayer is at least 90% of the density of its constituent material.

Claim 6

Dependent Claim 14 words

A window glass according to claim 1, wherein the sublayer is obtained by pyrolysis.

Claim 7

Dependent Claim 28 words

A window glass according to claim 1, wherein the sublayer is electrically conductive and allows the evacuation of the electrostatic charge that may accumulate on the window glass.

Claim 8

Dependent Claim 17 words

A window glass according to claim 1, wherein the sublayer consists of SnO 2 doped with fluorine.

Claim 9

Dependent Claim 33 words

A window glass according to claim 1, wherein the hydrophobic-oleophobic layer is obtained by means of at least one hydrolyzable fluorinated alkylsilane or a mixture of hydrolyzable fluorinated alkylsilanes and, optionally, other silanes.

Claim 10

Dependent Claim 39 words

A window glass according to claim 8, wherein the fluorinated alkylsilane is a perfluoroalkylsilane having the formula: CF.sub.3 --(CF.sub.2).sub.n --(CH.sub.2).sub.m --SiX.sub.3 in which n is 0 to 12, m is 2 to 5, and X is a hydrolyzable group.

Claim 11

Dependent Claim 25 words

A window glass according to claim 8 or claim 10, wherein the hydrophobic layer is a layer having a thickness between 10 and 50 Å.

Claim 12

Dependent Claim 159 words

A window glass comprising a substrate made of glass and a hydrophobic-oleophobic coating that is resistant to abrasion and comprising an essentially mineral sublayer and directly bonded thereto, a hydrophobic-oleophobic layer, wherein the contact angle of a drop on the coating, having been subjected to abrasion with 500 turns of a grinding wheel according to the standard ASTM D 1044-78, is greater than 60°, and wherein the mineral sublayer is selected from the group consisting of: Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 13

Dependent Claim 159 words

A window glass comprising a substrate made of glass and a hydrophobic-oleophobic coating that is resistant to abrasion and comprising an essentially mineral sublayer and directly bonded thereto, a hydrophobic-oleophobic layer, wherein the contact angle of a drop on the coating, having been subjected to abrasion with 500 turns of a grinding wheel according to the standard ASTM D 1044-78, is greater than 60°, and wherein the mineral sublayer is selected from the group consisting of: Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 14

Dependent Claim 147 words

A window glass comprising a substrate made of glass, having a functional stacking whose last layer is an essentially mineral layer whose density is equal to at least 80% of its constituent material, with said last layer being covered, at least in part, by a hydrophobic and oleophobic layer, directly bonded thereto, and wherein the mineral sublayer is selected from the group consisting of: Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 15

Dependent Claim 147 words

A window glass comprising a substrate made of glass, having a functional stacking whose last layer is an essentially mineral layer whose density is equal to at least 80% of its constituent material, with said last layer being covered, at least in part, by a hydrophobic and oleophobic layer, directly bonded thereto, and wherein the mineral sublayer is selected from the group consisting of: Al 2 O 3 , Ga 2 O 3 , SnO 2 , TiO 2 , Ta 2 O 5 , Cr 2 O 3 , ZrO 2 , Nb 2 O 5 , In 2 O 3 , Fe 2 O 3 , CoO 3 , V 2 O 5 , Y 2 O 3 , TiN, SiO x , with x being between 0 and less than 2, and SiO p C q , with 1<p<2 and 0<q<1, and mixtures thereof.

Claim 16

Dependent Claim 35 words

A window glass according to claim 12, wherein the hydrophobic and oleophobic layer is obtained by means of at least one hydrolyzable fluorinated alkylsilane or a mixture of hydrolyzable fluorinated alkylsilanes and, optionally, other silanes.

Claim 17

Dependent Claim 25 words

A window glass according to claim 13, wherein the functional stacking is selected from an antireflection stacking or a low emissive and/or electrically conductive stacking.

Claim 18

Dependent Claim 63 words

A method for the manufacture of a window glass according to claim 1, comprising the following steps: deposition of a hydrophobic and oleophobic layer on a dense and essentially mineral sublayer after an optional cleaning of the latter by bringing the substrate coated by the sublayer in contact with a solution containing at least one hydrolyzable fluorinated alkylsilane in a nonpolar solvent system.

Claim 19

Dependent Claim 72 words

A method for the manufacture of a window glass according to claim 1, comprising the following steps: optional cleaning of the surface of the substrate to be coated, deposition of an essentially mineral sublayer, with the density of the sublayer being equal to at least 80% of the density of its constituent material, optional cleaning of the sublayer to be coated, deposition of a hydrophobic and oleophobic layer onto said cleaned sublayer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-08-31	2002-03-02	2002-09-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-08-31	2006-03-02	2006-09-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-08-31	2010-03-02	2010-09-01	$7700.00	Window Closed / Lapsed

Multilayered hydrophobic window glass

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