IE83861B1 - A coating composition - Google Patents
A coating composition Download PDFInfo
- Publication number
- IE83861B1 IE83861B1 IE2000/0085A IE20000085A IE83861B1 IE 83861 B1 IE83861 B1 IE 83861B1 IE 2000/0085 A IE2000/0085 A IE 2000/0085A IE 20000085 A IE20000085 A IE 20000085A IE 83861 B1 IE83861 B1 IE 83861B1
- Authority
- IE
- Ireland
- Prior art keywords
- calcium carbonate
- approximately
- coating
- coating system
- binder
- Prior art date
Links
- 239000008199 coating composition Substances 0.000 title claims description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 82
- 229960003563 Calcium Carbonate Drugs 0.000 claims description 41
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 41
- 239000011248 coating agent Substances 0.000 claims description 36
- 238000000576 coating method Methods 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 26
- 239000011230 binding agent Substances 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 20
- 239000002562 thickening agent Substances 0.000 claims description 19
- 230000003115 biocidal Effects 0.000 claims description 14
- 239000003139 biocide Substances 0.000 claims description 14
- 230000002335 preservative Effects 0.000 claims description 14
- 239000003755 preservative agent Substances 0.000 claims description 14
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K Trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 11
- 239000001509 sodium citrate Substances 0.000 claims description 11
- 239000011778 trisodium citrate Substances 0.000 claims description 11
- 238000011065 in-situ storage Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- WXMKPNITSTVMEF-UHFFFAOYSA-M Sodium benzoate Chemical group [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 239000004299 sodium benzoate Substances 0.000 claims description 4
- 235000010234 sodium benzoate Nutrition 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229960000892 attapulgite Drugs 0.000 claims description 2
- 238000007580 dry-mixing Methods 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-K 2qpq Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 210000001503 Joints Anatomy 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 210000003491 Skin Anatomy 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000789 fastener Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
- C04B14/102—Attapulgite clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/40—Surface-active agents, dispersants
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/44—Thickening, gelling or viscosity increasing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/54—Pigments; Dyes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/67—Biocides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
- C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
- C04B40/0608—Dry ready-made mixtures, e.g. mortars at which only water or a water solution has to be added before use
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4857—Other macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B41/4869—Polyvinylalcohols, polyvinylacetates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
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- 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
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
- C09D5/028—Pigments; Filters
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
Description
“A COATING COMPOSITION”
Introduction
The invention relates to a coating composition for in situ coating a surface,
especially a wall formed by plasterboard wall panels to provide a high quality
surface finish.
Plasterboard which is referred to in some countries as wallboard, gypsum
wallboard, or drywall is widely used to provide internal walls and/or ceilings in
building constructions. The plasterboard is cut to a desired size from large panels
and the cut lengths are attached to fixtures such as wall bates. The joints between
adjacent boards are filled and the surface of the wall is skimmed with a plaster
compound by manual trowelling. This is extremely time consuming, labour
intensive, and requires considerable skill. In addition, even with such skilled
finishing techniques joints and fixing points are often clearly visible through the
skin. This is a particular problem when the wall is painted as the painting tends to
highlight rather than hide such imperfections.
There is therefore a need for a coating system for coating a surface, especially an
erected plasterboard wall or ceiling which will eliminate or at least substantially
reduce the problems with known systems.
Statements of Invention
According to the invention there is provided a coating system for in-situ coating of
a surface comprising a dry powder composition which is dispersible in an aqueous
applicator medium, the dry powder composition comprising calcium carbonate
and, by weight, relative to calcium carbonate, from 4% to 11% of a polymeric
binder, from 0.60% to 1.5% of a thickening agent and from 0.l0% to 0.35% of
sodium citrate.
Preferably the polymeric binder is an EVA (vinyl acetate/ ethylene) binder.
Most preferably the thickening agent is an inert mineral thickening agent which
may be derived from Attapulgite.
In one embodiment the binder is present in an amount of approximately 5% by
weight relative to the calcium carbonate.
In another embodiment the binder is present in an amount of approximately 10%
by weight relative to the calcium carbonate.
In one embodiment sodium citrate is present in an amount of approximately
.15% by weight relative to the calcium carbonate.
In another embodiment sodium citrate is present in an amount of approximately
.30% by weight relative to the calcium carbonate.
In one embodiment the thickening agent is present in an amount of approximately
.63% by weight relative to the calcium carbonate.
In another embodiment the thickening agent is present in an amount of
approximately 1.26% by weight relative to the calcium carbonate.
Preferably the coating system includes a preservative/biocide. Most preferably
the preservative/biocide is present in an amount from 0.25% to 0.35% by weight
relative to the calcium carbonate. Preferably the preservative/biocide is sodium
benzoate. Ideally the preservative/biocide is present in an amount of
approximately 0.30% by weight relative to the calcium carbonate.
One aspect of the invention provides a coating system for in-situ coating of a
surface formed by a plurality of plasterboard sections comprising a dry powder
composition which is dispersible in an aqueous applicator medium, the dry
powder composition comprising calcium carbonate and, by weight, relative to
calcium carbonate, approximately 5% of a polymeric binder, approximately
0.63% of a thickening agent, approximately 0.15% of a sodium citrate surfactant
and approximately 0.30% of a preservative/biocide.
Another aspect provides a coating system for in-situ coating of a surface formed
by a plurality of plasterboard sections comprising a dry powder composition
which is dispersible in an aqueous applicator medium, the dry powder
composition comprising calcium carbonate and, by weight, relative to calcium
carbonate, approximately 10% of a polymeric binder, approximately 1.26% of a
thickening agent, approximately 0.30% of a sodium citrate surfactant and
approximately 0.30% of a preservative/biocide.
A further embodiment of the invention provides a method for preparing a dry
powder composition comprising the steps of:
preparing a premix comprising the surfactant, the thickening agent and a
biocide/preservative; and
adding the premix to at least part of the calcium carbonate and binder.
In a preferred embodiment the method includes the step of dry mixing at least a
portion of the calcium carbonate with at least some of the binder and adding the
premix to the calcium carbonate/ binder mixture. Ideally the method comprises
mixing approximately half of the calcium carbonate with the binder, adding the
premix and subsequently adding the balance of the binder.
The invention further provides a method for preparing a coating composition
especially for application in situ to a wall formed by a number of plasterboard
sections comprising the step of mixing a dry powder composition with water.
Preferably the dry powder composition is mixed with water in an amount of
approximately 2 kg of coating composition per 1 litre of water.
In one embodiment of the invention the method includes the step of adding a
pigment to the mixture. Preferably the pigment is present in an amount of from
.5% to 5% by weight relative to calcium carbonate.
In addition the invention provides a method of coating a surface formed by a
plurality of plasterboard sections comprising applying a coating composition of
the invention. Ideally the coating composition is applied by a spray coating
technique. Alternatively the coating composition may be applied by a roller
technique.
Detailed Description
The invention will be more clearly understood from the following description
thereof given by way of example only.
A coating composition for in situ coating a wall formed by plasterboard wall
panels is prepared as follows from the following ingredients.
Spray Grade Roller Grade
Calcium Carbonate 1000 kgs 1000 kgs
EVA Binder 50 kgs 100 kgs
Sodium Benzoate 3 kgs 3 kgs
Sodium Citrate 1.5 kgs 3 kgs
Thickening Agent 6.3 kgs 12.6 kgs
A premix is first prepared by mixing in dry powder form, the sodium benzoate,
sodium citrate and the thickening agent.
kgs of the calcium carbonate are mixed with all of the EVA binder. The
premix is then added and the resultant dry power is fully mixed and blended.
The remaining 500 kgs of calcium carbonate is then added to form a dry powder
coating composition.
The liquid coating composition may be applied to a plasterboard wall using an
airless paint spray plant. The composition is dispersed in water to form a coating
which may be applied directly to the wall. 15 kgs of the composition are added to
about 7 litres of water and the mixture is dispersed by vigorous mixing for several
minutes.
The liquid coating composition thus formed is applied to a plasterboard wall using
an airless paint spray plant. The surface is coated with an even and consistent
film which on drying, provides a “white-out” surface.
Analogously the liquid coating composition may also be applied to a plasterboard
wall using a roller. In this case, the composition is dispersed in water to form a
coating which may be applied directly to the wall. The liquid coating composition
thus formed may then be applied to a plasterboard wall using a conventional
roller. The surface is coated with an even and consistent film which on drying,
provides a “white-out” surface.
It has been found that the coating achieves a very high quality surface finish to
which gloss or matt paint may be applied directly without joint photographing or
show-through of fasteners.
It will be appreciated that while the invention has been described as a coating for
application to plasterboard panels the coating composition may be applied to
other surfaces for example as a primer to a wallpaper, especially a non-embossed
wallpaper.
The invention is not limited to the embodiments hereinbefore described which
may be Varied in detail.
Claims (1)
1.5% of a thickening agent and from 0.10% to 0.35% of sodium citrate. A coating system as claimed in claim 1 wherein the binder is an EVA binder. A coating system as claimed in claim 1 wherein the thickening agent is an inert mineral thickening agent. A coating system as claimed in claim 3 wherein the inert mineral thickening agent is derived from Attapulgite. A coating system as claimed in any preceding claim wherein the binder is present in an amount of approximately 5% by weight relative to the calcium carbonate. A coating system as claimed in any of claims 1 to 4 wherein the binder is present in an amount of approximately 10% by weight relative to the calcium carbonate. A coating system as claimed in any preceding claim wherein sodium citrate is present in an amount of approximately 0.15% by weight relative to the calcium carbonate. A coating system as claimed in any of claims 1 to 6 wherein sodium citrate is present in an amount of approximately 0.30% by weight relative to the calcium carbonate. A coating system as claimed in any preceding claim wherein the thickening agent is present in an amount of approximately 0.63% by weight relative to the calcium carbonate. A coating system as claimed in any of claims 1 to 8 wherein the thickening agent is present in an amount of approximately 1.26% by weight relative to the calcium carbonate. A coating system as claimed in any preceding claim including a preservative/biocide. A coating system as claimed in claim 11 wherein the preservative/biocide is present in an amount of from 0.25% to 0.35% by weight relative to the calcium carbonate. A coating system as claimed in claim ll or 12 wherein the preservative/biocide is sodium benzoate. A coating system as claimed in any of claims ll to 13 wherein the preservative/biocide is present in an amount of approximately 0.30% by weight relative to the calcium carbonate. A coating system for in—situ coating of a surface comprising a dry powder composition which is dispersible in an aqueous applicator medium, the dry powder composition comprising calcium carbonate and, by weight, relative - to calcium carbonate, approximately 5% of a polymeric binder, approximately 0.63% of a thickening agent, approximately 0.15% of a citrate surfactant and 0.30% of a sodium approximately preservative/biocide. A coating system for in-situ coating of a surface formed by a plurality of plasterboard sections comprising a dry powder composition which is dispersible in an aqueous applicator medium, the dry powder composition comprising calcium carbonate and, by weight, relative to calcium carbonate, approximately 10% of a polymeric binder, approximately 1.26% of a thickening agent, approximately 0.30% of a sodium citrate surfactant and approximately 0.30% of a preservative/biocide. A method for preparing a dry powder composition as claimed in any preceding claim comprising the steps of: preparing a premix comprising the surfactant, the thickening agent and a biocide/preservative; and adding the premix to at least part of the calcium carbonate and binder. A method as claimed in claim 17 including the step of dry mixing at least a portion of the calcium carbonate with at least some of the binder and adding the premix to the calcium carbonate/ binder mixture. A method as claimed in claim 18 comprising mixing approximately half of the calcium carbonate with the binder, adding the premix and subsequently adding the balance of the binder. A method for preparing a coating composition for application in si_tu to a wall formed by a number of plasterboard sections comprising the step of mixing a dry powder composition as claimed in any of claims 1 to 17 with water. A method as claimed in claim 20 wherein the dry powder composition is mixed with water in an amount of approximately 2 kg of coating composition per 1 litre of water. A method as claimed in claim 20 or 21 including the step of adding a pigment to the mixture. A method as claimed in claim 22 wherein the pigment is added in an amount of from 0.5% to 5% by weight relative to calcium carbonate. A method of coating a surface formed by a plurality of plasterboard sections comprising applying a coating composition as claimed in any of claims 1 to 16. A method as claimed in claim 24 wherein the coating composition is applied by a spray coating technique. A method as claimed in claim 24 wherein the coating composition is applied by a roller technique.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE2000/0085A IE83861B1 (en) | 2000-02-14 | A coating composition |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IEIRELAND15/02/19991999/0106 | |||
IE990106 | 1999-02-15 | ||
IE2000/0085A IE83861B1 (en) | 2000-02-14 | A coating composition |
Publications (2)
Publication Number | Publication Date |
---|---|
IE20000085A1 IE20000085A1 (en) | 2000-09-20 |
IE83861B1 true IE83861B1 (en) | 2005-04-06 |
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