AU3796000A - Composition for coating transparent surfaces - Google Patents

Composition for coating transparent surfaces Download PDF

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Publication number
AU3796000A
AU3796000A AU37960/00A AU3796000A AU3796000A AU 3796000 A AU3796000 A AU 3796000A AU 37960/00 A AU37960/00 A AU 37960/00A AU 3796000 A AU3796000 A AU 3796000A AU 3796000 A AU3796000 A AU 3796000A
Authority
AU
Australia
Prior art keywords
composition
composition according
binder
transparent surfaces
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU37960/00A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Publication of AU3796000A publication Critical patent/AU3796000A/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/0015—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
    • C09C1/0021—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings comprising a core coated with only one layer having a high or low refractive index
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C2200/00—Compositional and structural details of pigments exhibiting interference colours
    • C09C2200/10—Interference pigments characterized by the core material
    • C09C2200/1004—Interference pigments characterized by the core material the core comprising at least one inorganic oxide, e.g. Al2O3, TiO2 or SiO2
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C2200/00—Compositional and structural details of pigments exhibiting interference colours
    • C09C2200/10—Interference pigments characterized by the core material
    • C09C2200/102—Interference pigments characterized by the core material the core consisting of glass or silicate material like mica or clays, e.g. kaolin

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Greenhouses (AREA)

Description

Our Ref:7480900 P/00/011 Regulation 3:2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): Merck Patent GmbH Frankfurter Strasse 250 D-64293 Darmstadt Germany DAVIES COLLISON CAVE Patent Trade Mark Attorneys Level 10, 10 Barrack Street SYDNEY NSW 2000 Address for Service: Invention Title: Composition for coating transparent surfaces The following statement is a full description of this invention, including the best method of performing it known to me:- 5020 Composition for coating transparent surfaces The present invention relates to a composition for coating transparent surfaces, as used, for example, for greenhouses, sheet constructions, dome lights, skylights or roof coverings, which possesses high transmission in the visible region of sunlight and high reflection in the NIR region.
In order to avoid excessive temperatures in the enclosed space and to diffuse the incident sunlight, use is currently made of shading paints, which consist S of one or more white pigments and a polymeric binder system. These shading paints are applied to the target surface in periods of intense solar irradiation, by spraying, rolling or brushing, and removed again in winter by washing off.
EP-A-428 937 describes a grey-white shading paint for greenhouses, which consists of a liquid binder and reflective particles suspended therein. These particles are aluminium flakes or titanium dioxide-coated mica eeee platelets. The shading paint is applied to the target surfaces for temporary coatings in periods of intense 25 solar irradiation, by spraying, brushing or rolling, and removed in winter by washing off with a water jet.
On the market, shading paints are available under the designation "Nixol" from the Farball company, the Netherlands, and under the designation "Redusol Xtra" from the Mardenho company, Netherlands.
The said shading paints diffuse the incident light and prevent scorching of the plants. Through absorption and the reflection of the incident light, they also effect a reduction in the temperature within the enclosed space. They have the disadvantage, however, that by reducing the amount of light transmitted they darken the space and reduce the photosynthetically active 2 radiation (PAR) for the plant. The ratio of light transmittance to solar transmittance is 1 or even less than i.
EP 0 548 822 describes a transluscent IR-reflective structure consisting of a plastic base material and a coating layer adhering to it. The coating layer contains from 20 to 40% by weight of a monolayer interference pigment. Disadvantages of this structure are that not only the NIR radiation but also a considerable proportion of the visible light is reflected and that the transmitted light is green and **the reflected light red.
ooo.
o:oo S 15 The object of the present invention is therefore to provide a composition for coating transparent surfaces which possesses high transmission in the visible region of light and high reflection in the NIR region and for which the ratio of light transmittance to solar S- 20 transmittance is greater than 1.
This object is achieved in accordance with the invention by a composition for coating transparent surfaces, comprising a) a multilayer interference pigment consisting of a transparent support material which is coated with alternating layers of materials of low and high refractive index, the difference in the refractive indices being at least 0.i, and b) at least one polymeric organic binder.
The composition of the invention additionally comprises further components as are known from coating technology. These include thickeners, dispersing auxiliaries, wetting agents and plasticizers.
3 The multilayer interference pigment present in the composition of the invention has distinct advantages over the white pigments contained in known shading paints, such as titanium dioxide, calcium carbonate, barium sulfate and magnesium oxide. The pigment possesses a much higher transmission in the region of visible light and in the region of photosynthetically active radiation (PAR) and results not only in reflection of the NIR radiation but also in diffusion of the incident light. The ratio of light transmittance to solar transmsittance is greater than 1. Light transmittance and solar transmittance are defined more closely in DIN EN 410.
coo.
15 Figure 1 shows the transmission and remission of the composition of the invention in comparison to a commercially available shading paint (Nixol). A 100 tm thick film of each was applied to glass plates. The pigment concentration in the composition of the invention was 10%. The transmission of the composition of the invention in the PAR region is approximately The transmission curve in this case falls steeply towards the NIR region, since the intention is to reflect as much thermal radiation as possible. In 25 contrast, the transmission of the known shading paint in the PAR region is only 25%. This means that, in the enclosed space of the plant, much less useful light is available and the growth, accordingly, is inhibited.
The remission -curves show that, with virtually identical remission in the NIR region, the composition of the invention possesses a transmission in the PAR region which is more than twice as high as that of the shading paint.
The multilayer interference pigment consists of a transparent, platelet-shaped support material. This support material can be natural or synthetic mica, another sheet silicate, glass flakes, platelet-shaped silica or alumina.
4 Generally 3 layers are applied to the support material.
The first layer consists of material of high refractive index, which can be Ti0 2 Zr02, Fe20 3 Fe304, Cr20 3 ZnO or a mixture of these oxides. The second layer consists of a material of low refractive index, for example Si02 or A1 2 0 3 The third layer consists in turn of a material of high refractive index. A protective layer may also be applied, optionally, to this layer assembly. The preparation of the pigment, and its properties, are described in detail in DE 196 18 569.
The multilayer interference pigment is present in the composition of the invention in concentrations of from 1 to 30% by weight, preferably from 3 to 15% by weight.
S As binders for the composition of the invention, use is made of polymers and copolymers which are known from coating technology. Suitable binders include alkyd resins, vinyl resins, epoxy resins, polyurethanes, acrylates, chlorinated rubber, polycarbonates, polyesters, polyethylene glycol and copolymers thereof.
The concentration of the binder in the shading paint is from 5 to 60% by weight, preferably from 10 to 30% by weight. The composition of the invention can be adapted S 25 to the respective substrate. In order to achieve better adhesion to glass, for example, 5% by weight of an acrylic polymer dispersion are used.
In addition to the two principal components, the composition of the invention also includes further additives as are known from coating technology. These include thickeners, dispersing auxiliaries, wetting agents and plasticizers, and also solvents, such as water, esters, ketones, alcohols or aromatics.
In order to increase the diffusion of the light, further additives can be added to the composition of the invention, such as calcium carbonate, magnesium carbonate, barium carbonate and zinc carbonate, magnesium oxide, barium sulfate or boron trioxide, in a concentration of from 1 to 20% by weight.
The composition of the invention is applied to the target surfaces in a layer thickness of from 20 to 200 jim, preferably 50 to 100 4m, by means of known techniques, such as spraying, brushing, rolling or pouring. The target surfaces concerned are glass, glazing material made from plastics, for example polymethyl methacrylate, polycarbonate, polystyrene or styrene-acrylonitrile copolymer, or polymer films, such as greenhouse films, for example. As remarked above, the composition of the invention can be adapted to the respective substrate.
In one particular embodiment the polymeric organic binder is in the form of an aqueous emulsion. It is consequently suitable for temporary coating of the transparent surfaces. In periods of intense solar 20 irradiation it can be applied by spraying, brushing, rolling or pouring and then in periods with low solar irradiation can be removed again with the aid of a water jet, with or without mechanical and/or chemical assistance.
The following example is intended to illustrate the invention without restricting it.
Example A composition of the invention consisting of binder, acrylic polymer dispersion (Neocryl®) multilayer interference pigment (AC 870, manufacturer Merck KGaA) plasticizer (PEG 3000) dispersing auxiliary (Rohagid SL-606) 3% wetting agent (BYK-348) 1% thickener (xanthan) 0.3% 6 water 75.7% is applied to a glass plate by spraying in a layer thickness of 100 lm. The transmission and remission of the applied layer are shown in Figure 1.
Comparative Example A commercially available shading paint, Nixol® from Farball, the Netherlands, is applied in a layer thickness of 100 gm to a glass plate. The transmission and remission of the applied layer are shown in Figure i.
15 Table r r c r r
F
Light transmittance/ with DIN EN 410 solar transmittance in accordance Example light transmittance solar transmittance solar factor 63% 49% 1.28 Comparative Example 48% 0.95 The solar factor is the ratio of light transmittance to solar transmittance.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
The reference to any prior art in this specification is not, and should not be taken as an acknowledgment or any form of suggestion that that prior art forms part of the common general knowledge in Australia.

Claims (6)

1. Composition for coating transparent surfaces, comprising a) a multilayer interference pigment consisting of a transparent support material which is coated with alternating layers of a material of low refractive index and a material of high refractive index, the difference in the refractive indices being at least 0.1, and b) at least one polymeric organic binder.
2. Composition according to Claim 1, characterized in :'that the multilayer interference pigment is present in a concentration of from 1 to 30% by weight, based on the composition.
3. Composition according to Claim 1 or 2, characterized in that the binder is an alkyd resin, vinyl resin, epoxy resin, polyurethane, acrylate, chlorinated rubber, polycarbonate, 25 polyester, polyethylene glycol or a copolymer thereof.
4. Composition according to at least one of Claims 1 to 3, characterized in that the binder is present in a concentration of from 5 to 60% by weight.
Composition according to at least one of Claims 1 to 4, characterized in that the binder is in the form of an aqueous emulsion.
6. Transparent surfaces coated with a composition according to Claims 1 to
AU37960/00A 1999-06-08 2000-06-06 Composition for coating transparent surfaces Abandoned AU3796000A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19925955 1999-06-08
DE19925955A DE19925955A1 (en) 1999-06-08 1999-06-08 Agent for coating transparent surfaces

Publications (1)

Publication Number Publication Date
AU3796000A true AU3796000A (en) 2000-12-14

Family

ID=7910454

Family Applications (1)

Application Number Title Priority Date Filing Date
AU37960/00A Abandoned AU3796000A (en) 1999-06-08 2000-06-06 Composition for coating transparent surfaces

Country Status (8)

Country Link
EP (1) EP1059338A3 (en)
JP (1) JP2001019908A (en)
KR (1) KR20010007264A (en)
AU (1) AU3796000A (en)
BR (1) BR0002594A (en)
DE (1) DE19925955A1 (en)
IL (1) IL136550A0 (en)
TW (1) TWI230188B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010111721A (en) * 2000-06-13 2001-12-20 김석환 The pigment compound and manufacturing method
JP2002224618A (en) * 2001-02-05 2002-08-13 Nippon Paint Co Ltd Coating film forming method and base material having coating film by coating film forming method
DE10221518A1 (en) 2002-05-14 2003-11-27 Merck Patent Gmbh Infrared reflective material
DE102006044076A1 (en) * 2006-09-20 2008-03-27 Merck Patent Gmbh Photocatalytically active coating
JP5535425B2 (en) * 2006-12-22 2014-07-02 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング Filler, method for producing the same, and cosmetics
EP2195391A1 (en) * 2007-10-02 2010-06-16 BASF Corporation A coating composition and a reflective coating system including same
EP2197950A1 (en) * 2007-10-05 2010-06-23 BASF Corporation Method of maintaining a color of a cured film formed from a coating composition
JP5648906B2 (en) * 2010-11-15 2015-01-07 株式会社Ｐｇｓホーム Infrared reflective coating film for solar cell module and solar cell module
DE102011103425A1 (en) * 2011-06-07 2012-12-13 Merck Patent Gmbh Wavelength selective reflective coating
US11952511B2 (en) 2019-03-15 2024-04-09 Swimc Llc Aqueous coating compositions including xanthan gum-based rheology package
CN112753477A (en) * 2021-02-26 2021-05-07 广州市园林建筑工程公司 Arbor out-of-season full-crown transplanting moisturizing rooting method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL106759A (en) * 1992-09-09 1998-06-15 Hyplast N V Hoogstraten Belgiu Composite material for the screening of solar radiation
DE4418215A1 (en) * 1994-05-25 1995-11-30 Gerd Hugo Camouflage paint with low emission in heat radiation range and mfr. process
IL117206A0 (en) * 1995-02-21 1996-06-18 Hyplast Nv Energy screen
DE59704636D1 (en) * 1996-04-25 2001-10-25 Ciba Sc Holding Ag Colored gloss pigments
DE19618569A1 (en) * 1996-05-09 1997-11-13 Merck Patent Gmbh Highly transparent multilayer interference pigments for lacquers, inks, cosmetics, laser-markable plastics etc.

Also Published As

Publication number Publication date
BR0002594A (en) 2001-01-02
EP1059338A3 (en) 2001-05-02
TWI230188B (en) 2005-04-01
JP2001019908A (en) 2001-01-23
IL136550A0 (en) 2001-06-14
KR20010007264A (en) 2001-01-26
DE19925955A1 (en) 2000-12-14
EP1059338A2 (en) 2000-12-13

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Legal Events

Date Code Title Description
MK1 Application lapsed section 142(2)(a) - no request for examination in relevant period