Field of invention
This present invention relates to process of coating on glass substrate with anti
ultraviolet or anti infrared spray. Moreover it also relates to a coating film formed by
the spray coating process and having coating film on the surface in this article.
Background of invention
The present invention relates to an ultraviolet and infrared absorbing glass plate for
use in airplanes, buildings, window glass, plastics of buildings, vehicles, ships, and
various display devices, and more particularly to a glass plate having an ultraviolet
and infrared absorbing film and an optional water-repellent film are formed. The
coating film containing an infrared-screening agent to prevent penetration of infrared
rays into rooms or automobiles to discourage the temperature in rooms or
automobiles. When ultraviolet- screening films are formed on front glass side glass
of automobiles, or window glass, ultraviolet rays can be intercepted, and can be
beware from fading caused by sunlight and human bodies can be protected from
harmful ultraviolet rays.
Safety glass is a multiple layer glazing construct that typically employs a polymeric
interlayer disposed between two layers of glass. Conventionally, safety glass of this
type has been manufactured by placing a polymer sheet between two layers of glass
and laminating the three layers by applying heat and pressure to produce a finished,
multiple layer glass panel. The resulting glazing panel resists penetration of an
object because the polymer sheet adheres strongly to the glass but remains flexible
and energy absorbent.
Many variations on this theme have been reported. For example, the interlayer can
be a single polymer sheet, or it can comprise multiple polymer sheets. In addition to
polymer sheets, other functional layers can be included as part of an interlayer,
including, for example, a polymer film that improves one or more characteristics of
the finished product
WO/2007/130773; PCT/US2007/066198; SOLUTIA INCORPORATED; HALDEMAN,
Steven discloses bilayers that include cesium tungsten oxide as an infrared
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absorbing agent. Cesium tungsten oxide can be incorporated into one or more layers
of a bilayer. Bilayers of the present invention incorporating cesium tungsten oxide
are effective at blocking infrared radiation and, surprisingly, the cesium tungsten
oxide agents do not degrade unacceptably over time.
104528829; SHENZHEN JIADA HIGH-TECH INDUSTRY DEVELOPMENT CO.
LTD; FAN XIAOJUN discloses a preparation method of cesium-tungsten bronze
powder and a function film. The preparation method of the cesium-tungsten bronze
powder comprises the following steps: carrying out an exchange treatment on
tungstate solution and cationic resin to obtain tungstic acid sol; adding citric acid
solution and cesium carbonate solution in the tungstic acid sol and then carrying out
a mixing treatment to obtain hydrothermal reaction precursor solution; carrying out a
hydrothermal reaction on the hydrothermal reaction precursor solution; after the
reaction is finished, carrying out a washing treatment and a drying treatment to
obtain the cesium-tungsten bronze powder. The function film disclosed by the
invention contains the cesium-tungsten bronze powder prepared by the preparation
method of the cesium-tungsten bronze powder disclosed by the invention; according
to the preparation method of the cesium-tungsten bronze powder disclosed by the
invention, by controlling reactants and carrying out hydrothermal method, the
preparation process is effectively simplified and the production cost of the cesiumtungsten
bronze powder is reduced; moreover, the cesium-tungsten bronze
produced under a specific hydrothermal reaction condition has excellent shielding
performance for infrared ray, particularly for near-infrared ray.
WO/2013/122645; PCT/US2012/066642; CELANESE INTERNATIONAL
CORPORATION WOLLRAB, Radmila discloses to a process for producing product
comprising ethanol which comprises contacting a feedstock comprising acetic acid
and hydrogen in a reaction zone at hydrogenation conditions with a catalyst
composition comprising at least one active metal that may include a Group VIII metal
and tin and from 0.01 to 0.5 wt% cesium on a support comprising tungsten or oxides
thereof..
None of the reference discloses the present invention. The present invention
discloses a composition of Tungsten Oxide and Cesium Oxide as Anti-UV and anti
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IR Glass Coating of multiple layer glazing panels, and also relates to Heat Insulation
& Anti-UV Glass Coating
Summary of invention
This invention relates generally to methods for forming coatings and having
preselected optical properties.It has already been usual to employ an inorganic
material or resin reflecting ultraviolet radiation and infrared radiation for forming a
coating for eliminating or reducing the generating range of solar radiation heat.
Typical examples of the inorganic materials such as FeOx, CoOx, CrOx, or WOx,
TiOx, and a metal having a large quantity of free electrons, such as Ag, Au or Al. The
inorganic materials have often tended to make a film of high electrical conductivity
which reflects radio waves to be received by for e.g. a car navigation system having
an aerial installed within a vehicle.
Because of heavy deterioration by heat or humidity the known organic agents have
been fatally low in weatherability. Moreover, a film having a high transmittance of
visible light has little power to cut off heat radiation, while a low transmittance of
visible light film having high power to cut off heat radiation.
The known inorganic materials have the property of reflecting or absorbing visible
light along with the near infrared radiation which is an important source of solar heat,
or a surface having an undesirably low transmittance of visible light. Also since the
components are present in LPG Aerosol can they are easier to transport and use.
Detail description of invention
Our experiments teach that the films in which particles are dispersed have a
maximum transmittance at a wavelength between 400-800 nm and a minimum
transmittance at a wavelength between 800-1800 nm. In view of the fact that visible
light has a wavelength of 380 to 780 nm and a visibility expressed by a curve having
a peak in the area of 550 nm, those films transmit visible light effectively and absorb
or reflect any other solar radiation effectively.The coating solution of this invention
contains also fine particles of tungsten dioxide. They have lower transmittance at
longer wavelengths in the near infrared region. These particles equally have a
diameter not exceeding 200 nm, and rather not exceeding 100 nm, and may be used
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in the form of a colloidal solution prepared by a wet process.Any method can be
employed for dispersing the fine particles if it can make a solution in which they are
equally dispersed.The solution contain an organic binder, such as an ultravioletcuring,
electron beam-curing, or a thermoplastic resin, or an organic-inorganic hybrid
binder prepared by modifying an organic binder with an oxide of an inorganic
substance, such as silicic, zirconium, titanium. The binder may be mixed with a
dispersion of the fine particles and directly make the solution. The base to which the
solution is applicable may, for example, a sheet or film of a transparent resinor a
sheet of glass. A polyethylene terephthalate (PET) film is a typical transparent resin
film which can be used for the certain suitable purposes. The resin which is usually
suitable as a film for the base is a transparent and colorless one not substantially
scattering light, but transmitting it, for example, a polycarbonate, polymethacrylate,
cyclic olefin, saturated polyester, polystyrene, or acetate resin. The adhesive layer
resin film used as the base may carry and a release film on one side thereof, so that
it can be stuck to e.g. a glass surface. It is possible to add, for example, CeO2, TiO2,
ZnO,WO2or a benzophenone or benzotriazole type agent for absorbing ultraviolet
radiation because for cutting ultraviolet radiation is first added to the adhesive for
protecting the base film or coating degraded by ultraviolet radiation.
In thatevent ultraviolet-curing resin is used as the binder, it is helpful to use
composition consisting mainly of a mixture of such as an epoxy, urethane, polyester,
or polyether- acrylate. It may further contain a thermopolymerization inhibitor, an
adhesive or thixotropic agent, a plasticizer, or a coloring agent.The addition of fine
particles of SiO2, TiO2, ZrO2, WO2, Al2O3increases the strength of film. Analogous
results can be obtained if the ultraviolet-curing resin has its principal constituent
combined chemically with SiO2, TiO2, WO2, ZrO2, Al2O3. The use of the ultravioletcuring
resin, which has brilliant properties including wear resistance, makes it
potential to form a resin film, or base, having a hard coat layer as well as the
property of cutting off heat radiation.
The solution containing a cold-curing resin as the binder can usefully be used to coat
windowpanes of an existing house, building, vehicle, etc. The fine particles can be
used as dispersant and its selection depends on the conditions or environment in
which the solution is used, and the synthetic resin which it contains as the binder. It
is possible to use, for example, water, or an organic solvent such as butoxypropanol,
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ether, ester or ketone. The coating solution may contain fine particles of SiO2, TiO2,
WO2, ZrO2, Al2O3 to form a film of improved hardness and wear resistance. These
particles are basically transparent and do not lower the transmittance of visible light
by a film.
The objective of the present invention to provide a glass plate having an ultraviolet
and infrared absorbing film formed on the glass substrate, which film is colorless and
transparent, substantially cuts long-wavelength ultraviolet rays until its upper limit
(about 400 nm), and infrared rays until its upper limit (about 800 nm) and is superior
in chemical resistance, abrasion resistance and durability. According to the present
invention, there is provided an ultraviolet and infrared absorbing glass plate
comprising:A first layer formed on a first major surface of the glass substrate, said
first layer being an ultraviolet and infrared absorbing film prepared by hardening a
coating solution,containing a synthetic resin, anda second layer being a film of a
siloxane polymer.The ultraviolet and infrared absorbing glass plate according to the
present invention optionally comprises a water repellent layer formed on a second
major surface of the glass substrate.
According to present invention the coating film formed on a surface containing an
ultraviolet-screening agent and an infrared-screening agent which is better in
spotting, blushing, partial breakage or cracking. The solvent butoxypropanol is added
to the spray coating in aerosol canand its range of 50-95% by weight.Some aerosol
products (e.g. air freshener, corrosive inhibitor, deodorant, insecticide, lubricant,
styling foam and snow spray, etc.) currently sold on the market contain a mixture
butoxypropanolof and other chemicals.
The protective film is formed by applying a silicic resinbased hard coating solution to
the hardened UV and IR absorbing film, and then by hardening the silicic resin
through drying and heating of the solution. In fact, a silicicprepolymer of the solution
is turned into a silicic polymer through drying and heating of the solution.
In the present invention that a fluorescent brightening agent, an ultraviolet absorbing
agent and an infrared absorbing agent are dissolved in the spray coating solution.
The fluorescent brightening agent serves to sharply cut long-wavelength ultraviolet
rays until the upper limit (about 400 nm) of the ultraviolet region. In general, a
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fluorescent brightening agent is defined as a material which absorbs UV rays and
thereby emits fluorescence in the visible region.
The binder component added in the spray coating acts as a binder coating film. For
example, there are some binder components such as alokysilanes, polyethylene,
polyvinyl chloride, polystyrenes, acrylic resins, polyamides, polyacetals, urea resins,
phenolic resins, polyurethanes melamine resins cements, gypsum etc. For more
hardness of film silicone resins, partial hydrolytic condensates are preferred. The
amount of binder used in spray coating can be suitably depending on the use, it is
preferably 4-49% to 5-35% by weight. If less than 5% weight is used the film strength
tends to decline and if it exceeds 49% by weight then ultraviolet-screening
performance or infrared-screening performance cannot be displayed. The ultravioletscreening
agents such as benzotriazole compounds and benzophenone compounds
and inorganic compounds such as titanium dioxide, zinc oxide, zinc silicate, cerium
oxide, hydrated titanium oxide orthotitanic acid, tungsten dioxide. Tungsten
dioxidecompounds having strong photocatalytic performance. The infrared-screening
agents such as aniline compounds and cyanine compounds are organic in nature
and inorganic compounds such as antimony-doped tin oxide, indium-doped tin oxide,
aluminium-doped tin oxide, iron oxide-coated mica, selenium oxide, zinc oxide,
rhodium oxide, bismuth oxychloride, caesium oxide, basic lead carbonate and metal
complexes of silver and manganese and the metals such as silver, gold, chromium,
nickel, tin, palladium, copper. The amount of ultraviolet and infrared screening
agents in the coating fluid can be set in the range of about 1-46% by weight more
preferably about 5-35% by weight, and 5-20% weight for the solid content. If the
amount is less than 1% by weight then ultraviolet and screening performance is
sometime decline, and if it exceeds 46% by weight then the binder component
amount decreases and hence also film strength tends to lower.
When the ultraviolet and infrared screening is used in solid form then the particle
diameter and shapes can also effect for the transmitting visible light. For example
about 1-100nm particle in diameter.In the spray coating optionally added additives
such as viscosity adjuster, crosslinking agent, surface active agent, pigment, filler,
deodorizer, conducting agent, dispersant, thickening agent, antistatic agent, and
electromagnetic wave screening agent in addition to the ultraviolet-screening agent
and infrared screening agent and the binder component and solvent. Moreover it is
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necessary polymerization initiators for the binder component may be added. The
total solid concentration of the spray coating is about 5-50% by weight preferably, for
more preferably 10-50% by weight. If the total solid concentration is less than 5% by
weight then, the resulting film tends to decline the performance of ultraviolet and
infrared screening agent and if it exceeds 50% by weight then the cracks are formed
which tends to cause decline of transmittance of the coating film. In this present
invention the spray coating fluid having a total solid concentration of 5-50% by
weight and comprises at the minimum binder component in an amount of 4-49% by
weight in terms of solid content and the butoxypropanol in an amount of 5-95% by
weight. A coater is used in which ejection nozzle has a tip bore diameter of 0.1-
0.55mm and which is provided with a blower for forming an air curtain, a coating fluid
minimize the ultraviolet and infrared screening agent, a binder component and
butoxypropanol solvent content of 50-95% by weight is coated under an ejection
pressure of the nozzle of 0.2-0.28 MPa and then coating is dried to form the coating
film containing the ultraviolet and infrared screening agent on the surface of the
substrate. The number of coating step, coating speed the spraying height etc,can be
controlled depending on the substrate, setting conditions of coating weights. For
example, in the present coating carried out in a short time of about 0.3-30 second
per 1 minute of the lengthwise width of the substrate and the coating time 0.5-1.0
seconds is more preferred.The transmittance for ultraviolet and infrared rays
ismeasured by a spectrophotometer.
Capacity of Aerosol
can/bottle (ml)
Dimensions Material
700 220 mm×65 mm Tin
600 185 mm×65mm Tin
500 157 mm×65mm Tin
400 210 mm×52 mm Tin
250 145 mm×52 mm Tin
200 110 mm×52 mm Tin
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The present invention will be explained in more detail by the following examples.
Example 1
The following coating fluid was sprayed on the glass plate (60×60×5mm) using an
aerosol canat low pressure and a coat was dried at room temperature to form a
coating film. The resultant spray coating film was transparent 40% of near infrared
rays and 90% of ultraviolet rays.
Composition of the coating film:
Example 1
(1) Binder component: Silicic acid 70% by weight
(2) Infrared-screening agent: Caesium oxide 5% by weight
(3) Ultraviolet-screening agent: Tungsten dioxide 20% by weight
(4) Solvent: Butoxypropanol 5% by weight.
(5) The above coating is mixed in LPG aerosol can LPG occupies 20% by weight
Example 2
(1) Binder component: Silicic acid 60% by weight
(2) Infrared-screening agent: Caesium oxide 15% by weight
(3) Ultraviolet-screening agent: Tungsten dioxide 10% by weight
(4) Solvent: butoxypropanol 15% by weight.
(5) The above coating is mixed in LPG aerosol can LPG occupies 40% by weight.
Industrial application
According to the present invention an ultraviolet and infrared screening films have
excellent in mottling, spotting blushing, durability, partial breakage or cracking.The
articles can be prevented from discoloration caused with sunlight and human bodies
can be protected from harmful ultraviolet rays under any operating environments.
Moreover, rising of temperature in rooms or automobiles can be inhibited by utilizing
the infrared-screening coating film.

We claim;
1.A process of coating for forming a coating film onto a surface of a glass substrate,
comprising; a coating fluid comprised of at least one of an ultraviolet-screening agent
, an infrared screening agent, a binder component and a solvent (butoxypropanol)
coater (LPG aerosol can) having a fluid ejection nozzle.
2. The coating process according to claim 1, where in the coating fluid contains the
solvent in an amount of 5-15% by weight.
3. The coating process according in claim 1, wherein the coating fluid has a total
solid concentration of 5-50% by weight and contain binder component in an amount
of 60-70 % by weight.
4. The coating process according to claim 1, wherein the air blowing pressure of the
aerosol can is0.2-0.28 MPa.
5.The coating process according to claim 1, wherein the coater is used in which
ejection nozzle has a tip bore diameter of 0.1-0.55mm
6. The coating process according to claim 1, wherein the glass substrate is at least
part of rear glass, side glass or front glass of automobiles.
7. The coating process according to claim 1, wherein the ultraviolet-screening agent
is comprised of at least one of a benzotriazole, tungsten dioxide(10-20%),titanium
dioxide, hydrated titanium oxide, titanium hydroxide, zinc silicate
8. The coating process according to claim 1, where in the infrared screening agent is
comprised of at least aniline and cyanine compound,caesium oxide (5-
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15%)antimony-doped tin oxide, indium-doped tin oxide, aluminium doped tin oxide,
selenium oxide, titanium oxide, rhodium oxide.
9.The coating process according to claim 1-8, wherein present coating carried out in
a short time of about 0.3-30 second per 1 minute of the lengthwise width of the
substrate, with preferred coating time 0.5-1.0 seconds.