GB2278360A - Wallpaper adhesive - Google Patents
Wallpaper adhesive Download PDFInfo
- Publication number
- GB2278360A GB2278360A GB9310692A GB9310692A GB2278360A GB 2278360 A GB2278360 A GB 2278360A GB 9310692 A GB9310692 A GB 9310692A GB 9310692 A GB9310692 A GB 9310692A GB 2278360 A GB2278360 A GB 2278360A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wallpaper
- acid
- adhesive
- adhesive according
- wallpaper adhesive
- 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.)
- Withdrawn
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- 239000000853 adhesive Substances 0.000 title claims abstract description 66
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 66
- 238000004040 coloring Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 9
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002585 base Substances 0.000 claims description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- ZHFPEICFUVWJIS-UHFFFAOYSA-M sodium 2-hydroxy-5-[(3-nitrophenyl)diazenyl]benzoate Chemical compound [Na+].Oc1ccc(cc1C([O-])=O)N=Nc1cccc(c1)[N+]([O-])=O ZHFPEICFUVWJIS-UHFFFAOYSA-M 0.000 claims description 5
- CPBJMKMKNCRKQB-UHFFFAOYSA-N 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one Chemical compound C1=C(O)C(C)=CC(C2(C3=CC=CC=C3C(=O)O2)C=2C=C(C)C(O)=CC=2)=C1 CPBJMKMKNCRKQB-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- UWEZBKLLMKVIPI-UHFFFAOYSA-N 2,5-dinitrophenol Chemical group OC1=CC([N+]([O-])=O)=CC=C1[N+]([O-])=O UWEZBKLLMKVIPI-UHFFFAOYSA-N 0.000 claims description 2
- RTZZCYNQPHTPPL-UHFFFAOYSA-N 3-nitrophenol Chemical compound OC1=CC=CC([N+]([O-])=O)=C1 RTZZCYNQPHTPPL-UHFFFAOYSA-N 0.000 claims description 2
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 1
- 150000001342 alkaline earth metals Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 229920002472 Starch Polymers 0.000 description 7
- 239000008107 starch Substances 0.000 description 7
- 235000019698 starch Nutrition 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004150 EU approved colour Substances 0.000 description 1
- ATJXMQHAMYVHRX-CPCISQLKSA-N Ellagic acid Natural products OC1=C(O)[C@H]2OC(=O)c3cc(O)c(O)c4OC(=O)C(=C1)[C@H]2c34 ATJXMQHAMYVHRX-CPCISQLKSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229940006093 opthalmologic coloring agent diagnostic Drugs 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000012015 potatoes Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/28—Non-macromolecular organic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
A wallpaper adhesive contains, as a colouring agent, an indicator which changes from coloured to colourless below a given pH value, and an acid or base in an amount sufficient to adjust the duration of the coloured phase to a defined time.
Description
Wallpaper Adhesive
This invention relates to a wallpaper adhesive.
A problem with conventional wallpaper adhesive is that it is colourless or substantially white. This makes it difficult to see where adhesive has already been applied. This often results in areas of paper not having adhesive applied, which can result in "bulging' of the wallpaper after it has bonded to the wall or ceiling. Another problem is that time, effort and adhesive are wasted by re-applying adhesive to areas that have already been covered.
GB-A-2 216 131 addresses these problems by providing a coloured wallpaper adhesive, in which the adhesive is substantially colourless when it is dry.
As used herein, the term "coloured" means sufficiently coloured to allow the user to easily see where the adhesive has been applied. The term "colourless" means sufficiently clear or pale that the colour of the wallpaper is not affected.
The coloured wallpaper adhesive of GB-A-2 216 131 enables the user to see where adhesive has, or has not, been applied.
This results in improved quality, improved productivity, reduced wastage and reduced eye strain. As a result of drying colourless, the adhesive does not affect the colour of the wallpaper,, however pale the latter may be.
A problem found with the wallpaper adhesive of GB-A-2 216 131 is that it provides no means for adjusting the time during which the adhesive remains coloured. The present invention solves this problem by providing a wallpaper adhesive containing, as a colouring agent, an indicator which changes from coloured to colourless below a given pH value, and an acid or base in an amount sufficient to adjust the duration of the coloured phase to a defined time.
The wallpaper adhesive is preferably provided in granular or powdered form. When it is required for use, it is mixed with water to form a paste. Alternatively, the wallpaper adhesive can be provided in the form of a ready-to-use paste.
The wallpaper adhesive used in the present invention can be entirely conventional, apart from the addition of the colouring agent and the acid or base. The adhesion-providing ingredients of wallpaper adhesives have been known for many years, and are commercially available from many different suppliers. The active ingredient is a naturally occurring polymeric carbohydrate, which has optionally been modified either chemically or physically. The long carbohydrate molecule provides many hydroxyl groups, and the adhesive nature of the composition is believed to be caused by hydrogen bonding through such hydroxyl groups. The carbohydrate can be selected from starch, dextrin and cellulose, but is preferably starch. The starch can be derived, for example, from corn, wheat, potatoes or rice.Wallpaper adhesives can be prepared not only from starch itself, but also from vegetable extracts which have a high starch content. One example of such an extract which can be used to prepare a wallpaper adhesive is plain wheaten flour. An embodiment of such a preparation is given in the Examples below.
The proportion by weight of adhesive composition (on a dry basis) to colouring agent is generally from 50:1 to 1000:1, preferably from 400:1 to 800:1. For reasons of economy, the lowest proportion of colouring agent which gives a desired colour is used.
The colouring agent is one which causes the adhesive paste to be coloured when in use, but become colourless when it has dried. This effect is achieved by using as the colouring agent an indicator which has a certain colour at the ambient pH of the adhesive paste, but which becomes colourless at a lower pH. As the paste dries, a slight reduction in the pH occurs. This may be due to absorption of carbon dioxide from the atmosphere, although this has not been proved. The indicators which can be used in the present invention preferably change from coloured to colourless when the pH falls to a value in the range of from 4 to 10, preferably from 6 to 9. Suitable indicators are 2,5-dinitrophenol, 4nitrophenol, 3-nitrophenol, o-cresolphthalein, phenolphthalein and alizarin yellow GG.For example, if the pH of the paste before being exposed to drying is 9 or above and, as the paste dries, the pH falls to a value below 8.0, then phenolphthalein is suitable. As another example, if the pH of the paste before being exposed to drying is 11 or above and, as the paste dries, the pH falls to below 10, then alizarin yellow GG is suitable.
Examples of bases which may be added to the wallpaper adhesive to increase the duration of the coloured phase are alkali and alkaline earth metal oxides, hydroxides and carbonates. Suitable compounds include sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, magnesium oxide, magnesium hydroxide, magnesium carbonate, calcium hydroxide and calcium carbonate.
Examples of acidic compounds which may be added to the wallpaper adhesive to decrease the duration of the coloured phase are organic and mineral acids and acidic salts, such as acetic acid, citric acid, tartaric acid, sodium bisulphate, sulphuric acid and hydrochloric acid.
The amount of the basic or acidic substance to be added to the wallpaper adhesive can be determined by preliminary tests depending on the extent to which it is desired to change the duration of the coloured phase. Suitable proportions are generally in the range of from 100 to 1000, preferably 200 to 800, parts by weight of adhesive per part by weight of basic or acidic substance.
The invention is illustrated by the following Examples.
Example 1
A basic wallpaper paste is prepared as follows. 1 kilogram of plain wheaten flour is placed in a clean pail, and tepid or lukewarm water is gradually added with vigorous stirring until a smooth creamy batter is obtained. 5 litres of water are boiled and, while still boiling, poured rapidly but steadily into the pail, with constant stirring. Stirring is continued until the paste has thickened. This is allowed to stand for a few minutes, and then a layer of cold water is poured over the paste to prevent a skin from forming. The paste is allowed to cool before use.
This paste is suitable for mixing with an indicator so that it changes to colourless on drying. It is first necessary to adjust the pH to a value appropriate for the selected indicator. For example, if phenolphthalein is used as the indicator, the pH is adjusted to 9 by adding sodium carbonate. The amount of sodium carbonate added determines the duration of the coloured phase of the paste.
Example 2
A cold water soluble starch adhesive is prepared as follows. Starch is mixed with water to form a liquid paste, and this is then dried on steam heated rolls. The drying rolls may either be single or double nip or doctor type, and the knife arrangement may be varied according to the design of the drums. The dried flakes are ground to the required particle size for final packing. It is preferable to produce a coarse particle and to remove dust before packaging.
Failure to do this results in lump formation when the product is dissolved in water.
In order to prepare a coloured wallpaper adhesive, the granular product prepared above is mixed with a suitable indicator. When the product is mixed with water to produce wallpaper paste, the paste has a colour which is determined by the particular indicator chosen, as shown below.
Colourings Anent Weiqht Ratio of Adhesive Colour
to Colouring Aqent Alizarin Yellow GG 120:1 yellow o-Cresolphthalein 180:1 pink
Phenolphthalein 250:1 pink
The above adhesive compostions become colourless when dry. As in Example 1, when an indicator is used the pH must be adjusted to a suitable value. When the indicator is phenolphthalein, sufficient sodium carbonate is added to provide an initial pH of about 9. The duration of the coloured phase is determined by the proportion of acid or basic substance used.
Example 3
All purpose wallpaper adhesive sold under the name "Homecare" (available from Robert McBride Homecare Ltd.,
Riversdale Mill, Hacken Lane, Darcy Lever, Bolton, BL3 1SJ, United Kingdom) in the form of dry powder was mixed with phenolphthalein (powder form, available from BDH Reagents,
Dorset, United Kingdom). The ratio of adhesive to indicator was 250 to 1 by weight. After the powders had been mixed in their dry state, the adhesive paste was prepared by mixing with water according to the manufacturer's instructions.
It was found that the pink colour started to fade shortly after being applied to the paper. The speed of this depended on the quantity and viscosity of the paste applied, as well as the paper used. Absorbent paper caused quicker fading.
Typically it was a few minutes before the colour had faded to an almost colourless state, and it was long before the paste was dry.
The phenolphthalein can be used in a proportion as low as 1000:1, when the initial colour is a pale pink.
Example 4
The following commercial wallpaper pastes can be used in the present invention:
Homecare All-purpose Wallpaper Adhesive.
Supplier: Robert McBride Homecare Ltd., Riversdale
Mill, Hacken Lane, Darcy Lever, Bolton, BL3 lSJ,
United Kingdom.
Solvite All-purpose Wallpaper Adhesive, instant mix.
Supplier: Henkel Chemicals Ltd. Henkel House, 292 - 308
Southbury Rd, Enfield, EN1 lTS, United Kingdom.
Polycell All-purpose Wallpaper Adhesive.
Supplier: Polycell Products Ltd, Broadwater Rd, Welwyn
Garden City, Hertfordshire, AL7 3AZ, United Kingdom.
All of the above wallpaper adhesives are provided in dry powder form, and are formed into wallpaper pastes by mixing with water. In each case, in order to provide a coloured wallpaper adhesive, the powder is mixed with any of the following colouring agents in the proportions indicated:
Phenolphthalein 10:1 to 1000:1
o-Cresolphthalein 10:1 to 100:1
Alizarin yellow GC 10:1 to 100:1
All supplied in powder form by BDH Ltd, Broom Rd, Poole,
BH12 4NN, United Kingdom.
Example 5
A wallpaper paste is made by using Solvite All-Purpose
Wallpaper Paste with ratios of adhesive flakes to calcium hydroxide and adhesive flakes to phenolphthalein both 500:1.
When the paste is mixed with water, the coloured phase has a duration of about 5 minutes. In comparison, if the paste is made with both ratios of 250:1, the duration of the coloured phase is about 40 minutes. A particularly suitable mix has a ratio of 250:1 adhesive flakes to calcium hydroxide, and 500:1 adhesive flakes to phenolphthalein. In this case, the coloured phase is about 10 minutes.
For a specific mix of adhesive, calcium hydroxide and phenolphthalein, the duration of the coloured phase varies depending on the thickness of the paste, i.e. the quantity of water added to the flakes, the temperature and the paper or material upon which the adhesive is applied.
The addition of calcium hydroxide also has the benefit of cost saving, as less phenolphthalein is required to obtain the equivalent colour strength and duration as when no calcium hydroxide is present.
If it is desired for a different wallpaper adhesive to shorten the duration of the colour phase, an acidic chemical is used instead of the alkali.
Claims (11)
1. A wallpaper adhesive containing, as a colouring agent, an indicator which changes from coloured to colourless below a given pH value, and an acid or base in an amount sufficient to adjust the duration of the coloured phase to a defined time.
2. A wallpaper adhesive according to Claim 1, which is in granular or powdered form and is capable of being converted into a wallpaper paste by mixing with water.
3. A wallpaper adhesive according to Claim 1 or 2, in which the proportion by weight of adhesive composition (on a dry basis) to colouring agent is from 50:1 to 1000:1.
4. A wallpaper adhesive according to Claim 3, in which the proportion by weight of adhesive composition to colouring agent is from 400:1 to 800:1.
5. A wallpaper adhesive according to any of Claims 1 to 4, in which the colouring agent is 2,5dinitrophenol, 4-nitrophenol, 3-nitrophenol, o- cresolphthalein, phenolphthalein or alizarin yellow GG.
6. A wallpaper adhesive according to any of Claims 1 to 5, in which the base is an oxide, hydroxide or carbonate of an alkali or alkaline earth metal.
7. A wallpaper adhesive according to any of Claims 1 to 5, in which the acid is acetic acid, citric acid, tartaric acid, sodium bisulphate, sulphuric acid or hydrochloric acid.
8. A wallpaper adhesive according to any of Claims 1 to 7, in which the proportion by weight of adhesive composition (on a dry basis) to acid or base is from 100:1 to 1000:1.
9. A wallpaper adhesive according to Claim 8, in which the proportion by weight of adhesive composition to acid or base is from 200:1 to 800:1.
10. A wallpaper adhesive according to any of Claims 1 to 9, in which the colouring agent is phenolphthalein and the base is calcium hydroxide.
11. A wallpaper adhesive according to Claim 1, substantially as hereinbefore described with reference to any of the examples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9310692A GB2278360A (en) | 1993-05-24 | 1993-05-24 | Wallpaper adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9310692A GB2278360A (en) | 1993-05-24 | 1993-05-24 | Wallpaper adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9310692D0 GB9310692D0 (en) | 1993-07-07 |
| GB2278360A true GB2278360A (en) | 1994-11-30 |
Family
ID=10736039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9310692A Withdrawn GB2278360A (en) | 1993-05-24 | 1993-05-24 | Wallpaper adhesive |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2278360A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001044399A1 (en) * | 1999-12-15 | 2001-06-21 | Henkel Kommanditgesellschaft Auf Aktien | Shaped body containing dye for producing an aqueous binding agent system |
| WO2003062555A1 (en) * | 2002-01-25 | 2003-07-31 | Pergo(Europe) Ab | A process for sealing of a joint with a glue that is activated by a fluid |
| EP1382653A1 (en) * | 2002-07-17 | 2004-01-21 | Roman Decorating Products, Inc | Color-changing wallpaper adhesive and primer composition |
| WO2007007135A3 (en) * | 2005-07-13 | 2007-10-18 | Eamonn Patton | Coloured paste and adhesive |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243184A (en) * | 1987-03-31 | 1988-10-11 | Nippon Kayaku Co Ltd | Color-changing adhesive |
-
1993
- 1993-05-24 GB GB9310692A patent/GB2278360A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243184A (en) * | 1987-03-31 | 1988-10-11 | Nippon Kayaku Co Ltd | Color-changing adhesive |
Non-Patent Citations (3)
| Title |
|---|
| WPI Accession No 68-07015Q/00 & JP 43012518 B * |
| WPI Accession No 73-38470 U/27 & JP 47022176 A * |
| WPI Accession No 88-327898/46 & JP 63243184 A * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001044399A1 (en) * | 1999-12-15 | 2001-06-21 | Henkel Kommanditgesellschaft Auf Aktien | Shaped body containing dye for producing an aqueous binding agent system |
| RU2267510C2 (en) * | 1999-12-15 | 2006-01-10 | Хенкель КГАА | Molded article made of substances for preparing aqueous system of binding agents, in particular, paste for wall coatings |
| WO2003062555A1 (en) * | 2002-01-25 | 2003-07-31 | Pergo(Europe) Ab | A process for sealing of a joint with a glue that is activated by a fluid |
| CN1302189C (en) * | 2002-01-25 | 2007-02-28 | 佩尔戈(欧洲)股份公司 | Process for sealing of a joint with a glue that is activated by a fluid |
| EP1382653A1 (en) * | 2002-07-17 | 2004-01-21 | Roman Decorating Products, Inc | Color-changing wallpaper adhesive and primer composition |
| US6894095B2 (en) | 2002-07-17 | 2005-05-17 | The Dial Corporation | Color-changing wallpaper adhesive primer/activator |
| WO2007007135A3 (en) * | 2005-07-13 | 2007-10-18 | Eamonn Patton | Coloured paste and adhesive |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9310692D0 (en) | 1993-07-07 |
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