IE84325B1 - A coating composition - Google Patents
A coating composition Download PDFInfo
- Publication number
- IE84325B1 IE84325B1 IE2005/0123A IE20050123A IE84325B1 IE 84325 B1 IE84325 B1 IE 84325B1 IE 2005/0123 A IE2005/0123 A IE 2005/0123A IE 20050123 A IE20050123 A IE 20050123A IE 84325 B1 IE84325 B1 IE 84325B1
- Authority
- IE
- Ireland
- Prior art keywords
- calcium carbonate
- amount
- weight relative
- present
- approximately
- Prior art date
Links
- 239000008199 coating composition Substances 0.000 title claims description 16
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 50
- 229960003563 Calcium Carbonate Drugs 0.000 claims description 25
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 25
- 239000002562 thickening agent Substances 0.000 claims description 13
- 239000011230 binding agent Substances 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 230000003115 biocidal Effects 0.000 claims description 8
- 239000003139 biocide Substances 0.000 claims description 8
- 230000002335 preservative Effects 0.000 claims description 8
- 239000003755 preservative agent Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K Trisodium citrate Chemical group [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001509 sodium citrate Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000011778 trisodium citrate Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 238000011065 in-situ storage Methods 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
- 238000005507 spraying Methods 0.000 claims description 3
- 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
- 239000000843 powder Substances 0.000 description 2
- 210000003491 Skin Anatomy 0.000 description 1
- 229960000892 attapulgite Drugs 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
- 229910052625 palygorskite Inorganic materials 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
Description
“A COATING COMPOSITION”
Introduction
The invention relates to a coating composition for in situ coating a surface, especially
a wall fomied 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 oflnvention
According to the invention there is provided a method for in-situ coating a surface
formed by a plurality of plasterboard sections comprising the steps of:-
providing a coating composition comprising calcium carbonate and, by weight,
relative to the calcium carbonate, from 4% to l 1% ofa polymeric binder, from
0.60% to 1.5% of a thickening agent and from 0.10% to 0.35% ofa surfactant,
dispersed in water; and
applying the coating composition to a surface formed by the plasterboard
sections using an airless spray coating technique or a roller technique.
Preferably the polymeric binder is an EVA (vinyl acetate/ethylene) binder.
The surfactant may be sodium citrate.
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.
ln 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 0.15% by
weight relative to the calcium carbonate.
In another embodiment sodium citrate is present in an amount of approximately 0.30%
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
.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.
ln 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 0.5% to 5% by
weight relative to calcium carbonate.
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 I000 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 I2.6 kgs
A premix is first prepared by mixing in dry powder form, the sodium benzoate,
sodium citrate and the thickening agent.
kgs ofthe calcium carbonate are mixed with all ofthe 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 ofthe 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 fomied 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 rnatt 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 (7)
- I. A method for in-situ coating a surface formed by a plurality of plasterboard sections comprising the steps of:- providing a coating composition comprising calcium carbonate and, by weight, relative to the calcium carbonate, from 4% to I l% of a polymeric binder, from 0.60% to 1.5% ofa thickening agent and from 0.10% to 0.35% of a surfactant, dispersed in water; and applying the coating composition to a surface formed by the plasterboard sections using an airless spray coating technique or a roller technique.
- 2. A method as claimed in claim 1 wherein the binder is an EVA binder.
- 3. A method as claimed in claim 1 wherein the surfactant is sodium citrate.
- 4. A method as claimed in claim 1 wherein the thickening agent is an inert mineral thickening agent.
- 5. A method as claimed in claim 4 wherein the inert mineral thickening agent is derived from Attapulgitc.
- 6. A method as claimed in any preceding claim wherein the binder is present in an amount of approximately 5% by weight relative to the calcium carbonate.
- 7. A method as claimed in any of claims I to 5 wherein the binder is present in an amount of approximately 10% by weight relative to the calcium carbonate. A method as claimed in any preceding claim wherein the surfactant. is present in an amount of approximately 0.15% by weight relative to the calcium carbonate. A method as claimed in any of claims I to 7 wherein the surfactant is present in an amount of approximately 0.30% by weight relative to the calcium carbonate. A method 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 method as claimed in any of claims 1 to 9 wherein the thickening agent is present in an amount of approximately 1.26% by weight relative to the calcium carbonate. A method as claimed in any preceding claim including a preservative/biocide. A method as claimed in claim 12 wherein the preservative/biocide is present in an amount of from 0.25% to 0.35% by weight relative to the calcium carbonate. A method as claimed in claim 12 or 13 wherein the preservative/biocide is sodium benzoate. A method as claimed in any of claims I2 to 14 wherein the preservative/biocide is present in an amount of approximately 0.30% by weight relative to the calcium carbonate. A method as claimed in any previous claim including the step of adding a pigment to the mixture. A method as claimed in claim 16 wherein the pigment is added in an amount of from 0.5% to 5% by weight relative to calcium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE2005/0123A IE84325B1 (en) | 2000-02-14 | A coating composition |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IEIRELAND15/02/1999990106 | |||
| IE990106 | 1999-02-15 | ||
| IE2005/0123A IE84325B1 (en) | 2000-02-14 | A coating composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE20050123A1 IE20050123A1 (en) | 2005-06-29 |
| IE84325B1 true IE84325B1 (en) | 2006-08-23 |
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