GB2329895A - Adhesive containing calcium sulphate - Google Patents
Adhesive containing calcium sulphate Download PDFInfo
- Publication number
- GB2329895A GB2329895A GB9720960A GB9720960A GB2329895A GB 2329895 A GB2329895 A GB 2329895A GB 9720960 A GB9720960 A GB 9720960A GB 9720960 A GB9720960 A GB 9720960A GB 2329895 A GB2329895 A GB 2329895A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- composition according
- composition
- component
- vinyl
- 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.)
- Granted
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 25
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 25
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims abstract description 24
- 239000001175 calcium sulphate Substances 0.000 title claims abstract description 11
- 235000011132 calcium sulphate Nutrition 0.000 title claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 48
- 229910001868 water Inorganic materials 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 8
- 229920002472 Starch Polymers 0.000 claims abstract description 6
- 239000008107 starch Substances 0.000 claims abstract description 6
- 235000019698 starch Nutrition 0.000 claims abstract description 6
- 206010016807 Fluid retention Diseases 0.000 claims abstract description 5
- 239000003607 modifier Substances 0.000 claims abstract description 5
- 239000006254 rheological additive Substances 0.000 claims abstract description 5
- 239000000440 bentonite Substances 0.000 claims abstract description 4
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 16
- 150000002170 ethers Chemical class 0.000 claims description 7
- -1 alkali metal salts Chemical class 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 2
- 229920006243 acrylic copolymer Polymers 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- GLVVKKSPKXTQRB-UHFFFAOYSA-N ethenyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC=C GLVVKKSPKXTQRB-UHFFFAOYSA-N 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 16
- 239000000919 ceramic Substances 0.000 abstract description 7
- 239000002952 polymeric resin Substances 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 3
- 239000004927 clay Substances 0.000 abstract description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 2
- 229960000892 attapulgite Drugs 0.000 abstract 1
- 229910052570 clay Inorganic materials 0.000 abstract 1
- 229910052625 palygorskite Inorganic materials 0.000 abstract 1
- 239000010456 wollastonite Substances 0.000 abstract 1
- 229910052882 wollastonite Inorganic materials 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910001653 ettringite Inorganic materials 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229920005789 ACRONAL® acrylic binder Polymers 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 229920003091 Methocel™ Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical class [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
A composition for admixing with water to form an adhesive, comprises: (A) anhydrous and/or partially hydrated calcium sulphate; (B) a hardening-rate modifier to regulate the rate of setting of the composition when admixed with water; (C) a water-retention aid; (D) a rheology modifier; and (E) a water-soluble or redispersible polymer resin. A cellulose ether, starch ether or gum may constitute both (C) and (D) and (D) may also be a bentonite clay, wollastonite or attapulgite. The compositions may be used for adhering ceramic tiles to a substrate.
Description
ADHESIVE
This invention relates to adhesive compositions, particularly but not exclusively for adhering ceramic tiles or the like to a substrate.
It is often desired to adhere ceramic tiles directly to gypsum-based substrates, such as floors and walls. The use of adhesives based on portland cement for this purpose has not hitherto been successfiil due to reaction of tricalcium aluminate in the portland cement with water soluble salts in the substrate to form ettringite in the adhesive layer. This causes weakness of the adhesive/substrate interface and leads to failure in bonding the tiles to the substrate. In order to solve this problem it has hitherto been proposed to apply a primer layer to the substrate before application of the adhesive in order to form a chemical barrier to prevent ettringite formation. The application of such a barrier layer is, however, laborious and increases expense, as well as sometimes decreasing the strength of the bond between the tile and the substrate.
EP-A-O 320 982 describes tile adhesives and grouts containing calcium sulphate and an aluminate-free cement.
Tile adhesives are generally used in two types of application. Thin-bed applications are usually used for applying tiles to substantially uniform surfaces, such as walls, and in this application the thickness of the adhesive layer is up to 3 mm.
Thick-bed applications, where the thickness of the adhesive layer is greater than 3 mm, are used where the surface of the substrate is uneven, such as on floors or poorly finished walls.
We have now found it possible to formulate a calcium sulphate-based adhesive, e.g. for bonding a ceramic tile in thin- or thick-bed applications, that does not suffer from the above mentioned disadvantages when used with a gypsum-based substrate.
References to "ceramic tiles" herein are intended to encompass not only ceramic tiles per se but also other hard surface coverings such as natural or reconstituted stones and mosaics.
According to one aspect, the invention provides a composition for admixing with water to form an adhesive, comprising:
(A) anhydrous and/or partially hydrated calcium sulphate;
(B) a hardening-rate modifier to regulate the rate of setting of the composition when admixed with water;
(C) a water-retention aid;
(D) a rheology modifier; and
(E) a water-soluble or redispersible polymer resin.
Various preferred features and embodiments of the invention are described below by way of non-lirniting illustration.
The compositions of the invention are generally in the form of dry powders that are admixed with water immediately prior to use to form an adhesive paste that can be used in thick- or thin-bed applications. The amount of water added to the composition of the invention is therefore generally chosen to enable the adhesive to be readily applied uniformly to the substrate with little or no slippage of the ceramic tile before hardening of the adhesive occurs. The compositions of the invention form adhesives that avoid ettringite formation when applied to a gypsum-base substrate and therefore have high bond strengths.
Component (A) of the compositions of the invention is anhydrous or partially hydrated calcium sulphate, e.g. calcium sulphate hemihydrate in a- or ss- form. For reasons of cost and ready availability, it is preferred to use calcium sulphate hemihydrate (ss- form) as a fine powders
The compositions of the invention contain (B) a hardening-rate modifier to regulate the rate of setting of the composition when admixed with water. Without such a hardening-rate modifier, compositions containing anhydrous calcium sulphate set too slowly when admixed with water, and compositions containing partially hydrated calcium sulphate set too quickly. Materials that can be used for this purpose include: alkali metal salts to accelerate the rate of setting when the compositions contain anhydrous calcium sulphate; and/or organic acids and/or salts thereof to retard the rate of setting when the compositions contain a partially hydrated calciurn sulphate. Examples of organic acids that may be used include citric acid and other carboxylic acids such as tartaric acid, and their salts. In some circumstances, the resin component (E) ofthe compositions may comprise a material that acts as a hardening retarder, e.g. where component (E) contains an organic acid or salt, and in these cases component (E) may have a dual function and it may not be necessary to add additional component (B).
Other materials that serve to regulate the rate of setting of calcium sulphatecontaining compositions are known to those skilled in the art.
The compositions of the invention include (C) a water retention aid.
Materials that can be used for this purpose include cellulose ethers, starch ethers, natural or synthetic gums and the like. Examples of cellulose ethers include: hydroxypropyl methyl cellulose, commercially available as Methocels (Dow Chemical
Company) or Walocels (Wolff Walstrode AG); carboxymethyl celluose ethers, commercially available from Courtaulds Chemicals and Wolff Walstrode AG; and methyl hydroxyethyl cellulose ethers, commercially available as Tylose (Hoechst) or
Culminal (Aqualon).
The compositions also include (D) a rheology modifier to allow the compositions to be readily applied to a substrate when admixed with water in use and which help to prevent slippage of the tiles while the adhesive is setting. Materials that can be used for this purpose include the above-mentioned cellulose ethers, starch ethers and natural or synthetic gums, as well as inorganic materials such as bentonite clays, wollastonites, attapulgites and the like. Bentonite clays are commercially available in the Bentone range from Redland Minerals, and attapulgites are commercially available in the Attagel range from Lawrence Industries. It will be appreciated that when the compositions of the invention contain cellulose ethers, starch ethers and/or natural or synthetic gums, these may serve as both waterretention aids (C) and rheology modifiers (D).
The compositions ofthe invention include (E) a water-soluble or redispersible polymer resin. The resin generally serves to improve the cohesive and adhesive strength of the compositions when admixed with water in use. Examples or resins that may be utilised in the compositions of the invention include water-soluble resins, such as polyvinyl alcohol, and preferably redispersable polymer powder resins, e.g. derived from dispersions of: vinyl resins; styrene resins; copolymers of vinyl laurate, vinyl chloride and/or vinyl acetate and ethylene; vinyl acetate; copolymers of vinyl
acetate and vinyl versatatet styrene/acrylic copolymers; or resins derived from dispersions of styrene and butyl acetate or styrene and butadiene. The resins may optionally be silanated, e.g. silane groups may be added during polymerisation, since this has been found to increase the water resistance ofthe composition.
Suitable resins include: Goshenol water-soluble polyvinyl alcohol polymers; and redispersible polymer powders such as Rhophlex resins from Rohm and Haas, particularly Rhophlex DP 2605; Elotex resins from Elotex AG, particularly Elotex 1080, Elotex 50V/906, Elotex WS45 or WS73, Elotex AP200, Elotex BN0107 and
Elotex WSlOlE; Vinnapas resins from Wacker Chemicals, particularly Vinnapas RI 532Z, Vinnapas RE5452, 546Z and 547Z, Vinnapas RI 538Z; Mowilith powder resins from Hoechst Limited, particularly Mowilith LDM 2072P, LDM 20700,
DM117P and LDM 2040P; Acronal DS6200 from BASF (UK) Limited; PAV 27,
PAV 29 and Rhodopas PSB 54 from Rhone-Poulenc; and DLP 110 and DLP 120 from Dow Europe.
The compositions of the invention may optionally further include calcium hydroxide, usually in powder form, in order to improve workability of the compositions when admixed with water for use. The incorporation of calcium hydroxide also serves as a pH increaser and rapidly activates resin component (E).
It is also sometimes convenient to optionally add fibres, fillers, antifoaming agents and/or wetting agents to the compositions of the invention. The presence of fibres serves to improve the coherence and resistance to slippage of the adhesive before it hardens and sets. Examples of fibres that may be used include natural or synthetic organic materials such as cotton, wool, nylon, polyethylene or polypropylene fibres, as well as inorganic fibres such as glass fibres.
Fillers that may be incorporated into the compositions ofthe invention include fine particle size inorganic materials such as silica sand, calcium carbonate (e.g. in the
Fillers that may be incorporated into the compositions ofthe invention include fine particle size inorganic materials such as silica sand, calcium carbonate (e.g. in the form of ground limestone or calcite) or calcium magnesium carbonates (dolomites).
The use of fillers is particularly preferred where the compositions are to be used in thick-bed applications since they help to reduce cost and enhance the workability of the adhesive.
Component (A) is conveniently present in an amount of 10-80% by weight of the dry composition of the invention. Component (B) is conveniently present in an amount of 0.01 to 2% by weight. Component (C) is conveniently present in an amount of from 0.05 to 3% by weight. Component (D) is conveniently present in an amount up to 5% by weight. Component (E) is conveniently present in an amount of 0.5 to 10% by weight.
When present, calcium hydroxide is conveniently present in an amount up to 10% by weight of the composition. Optional fillers may conveniently be present in an amount of from 10 to 50% by weight. Fibres may optionally be present in an amount of from 0.1 to 2% by weight.
Shortly before use, the compositions ofthe invention are mixed with sufficient water to form a smooth, firm adhesive paste which may be applied to a substrate before tiles are applied thereto. The adhesive of the invention allows sufficient working time before hardening and setting, and during this period little or no slippage of the tiles occurs. The ability to provide little slippage is especially advantageous when tiles are to be applied to walls. The adhesive provides a high bond strength, and may be applied to a gypsum-based substrate without first applying a primer layer.
In some cases, however, it may be desirable first to apply a primer layer, e.g. to stabilise a cracked or crumbling substrate, but this is not necessary to prevent ettringite formation.
The following non-limiting examples serve to illustrate the invention.
FORMULATION 1 2 3 4 5 comparison comparison alpha CaSO4.H2O 80 80 50 beta CaSO4.H2O 40 35 Fine silica sand 20 20 20 Ground limestone 18 18 20 20 25 Calcium hydroxide 2.4 10 5 Redispersible resin-1 ditto-2 2 ditto - a blend 5 5 3 Cellulose ethers 2.5 3 1.5 Clay 1.5 9.0 Organic acid 0.1 0.5 1.0 Cellulose fibres 0.5 Water 22 23 27 27 26 RESULTS All tested and stored at 23 C/50% RH.
Setting time over 5 days 11 mins 19 mins 41 minus 60 mins Open time 2 mins 11 mins 19 minus 22 mins Workability Poor Good Good V. good Slip 1 mm 1 mm 0.5 mm Bond Stengths: (a) Tensile to CEN pr EN 1348 in N/mm2 0.7 0.72 0.7 (b) Shear to BS 5980 @ 14 days 9.5 > 20 > 20 18.0 @24 hours in kN 10.00 For further comparison, an adhesive was prepared containing: a-CaSO4.t/2 H20 - 100 gms
(Calcium sulphate alpha hemihydrate)
Water - 24 gms.
This set hard in 5 mins. and was difficult to make up for shear test samples. It was tested after 14 days in air to the shear-test requirements of British standard 5980, and gave only 2 kN (Minimum pass level 8.9 kN).
Claims (9)
1. A composition for admixture with water to form an adhesive, comprising:
(A) anhydrous and/or partially hydrated calcium sulphate;
(B) a hardening-rate modifier to regulate the rate of setting ofthe composition when admixed with water;
(C) a water-retention aid;
(D) a rheology modifier; and
(E) a water-soluble or redispersible polymer resign.
2. A composition according to claim 1 wherein component (A) comprises calcium sulphate hemihydrate (beta form).
3. A composition according to either of claims 1 or 2 wherein component (B) comprises one or more alkali metal salts, organic acids and/or salts thereof.
4. A composition according to any preceding claim wherein component (C) comprises one or more cellulose ethers, starch ethers and/or natural or synthetic gums.
5. A composition according to any preceding claim wherein component (D) comprises one or more cellulose ethers, starch ethers, natural or synthetic gums, bentonite clays, wollastonites and/or attapulgites.
6. A composition according to any preceding claim wherein component (E) comprises one or more: polyvinyl alcohols; vinyl resins; styrene resins; copolymers of vinyl laurate, vinyl chloride and/or vinyl acetate and ethylene; vinyl acetate; copolymers of vinyl acetate and vinyl versatate; styrene/acrylic copolymers; or resins derived from dispersions of styrene and butyl acetate or styrene and butadiene; which may optionally be silanated.
7. A composition according to any preceding claim which additionally contains calcium hydroxide.
8. A composition according to any preceding claim which additionally contains fibres and/or fillers.
9. An adhesive composition comprising water in admixhrre with a composition as defined in any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9720960A GB2329895B (en) | 1997-10-02 | 1997-10-02 | Method of adhering tiles using an adhesive containing calcium sulphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9720960A GB2329895B (en) | 1997-10-02 | 1997-10-02 | Method of adhering tiles using an adhesive containing calcium sulphate |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9720960D0 GB9720960D0 (en) | 1997-12-03 |
| GB2329895A true GB2329895A (en) | 1999-04-07 |
| GB2329895B GB2329895B (en) | 2001-07-25 |
Family
ID=10819966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9720960A Expired - Fee Related GB2329895B (en) | 1997-10-02 | 1997-10-02 | Method of adhering tiles using an adhesive containing calcium sulphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2329895B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824606B1 (en) * | 1998-05-20 | 2004-11-30 | Tolsa, S.A. | Additive for special plasters and mortars, compositions containing the additive and utilization of the additive in special plasters and mortars |
| EP1785406A1 (en) * | 2005-11-14 | 2007-05-16 | La Chape Liquide S.A.S. | Method for bonding on gypsum screeds |
| WO2008151879A1 (en) * | 2007-06-14 | 2008-12-18 | Construction Research & Technology Gmbh | Dry construction material mixtures based on calcium sulfate |
| CN104072077A (en) * | 2014-07-02 | 2014-10-01 | 杨连树 | Special interface agent for moisture-proof water-proof gypsum blocks and preparation method of interface agent |
| ITMI20131323A1 (en) * | 2013-08-02 | 2015-02-03 | Gabriella Costamagna | DECORATIVE ELEMENT, IN PARTICULAR FOR THE COATING OF WALLS AND FLOORS, AND ITS PREPARATION PROCEDURE |
| WO2017004120A1 (en) * | 2015-06-30 | 2017-01-05 | Dow Global Technologies Llc | Gypsum compositions containing crosslinked cellulose ethers for mortars with reduced stickiness |
| WO2023277678A1 (en) * | 2021-07-01 | 2023-01-05 | Vazquez Carrera Daniel | Dry-mix compositions comprising cement, esters of cellulose and ethylene-vinyl acetate copolymer with use in the production of adhesives for cement tiles, glazed ceramic floor tiles, porcelain tiles, glazed ceramic tiles, natural stone, cultured stone, quarry stone and marble |
| WO2023287274A1 (en) * | 2021-07-16 | 2023-01-19 | Vazquez Carrera Daniel | Dry-mix compositions comprising cellulose esters, calcium sulfate dihydrate, pre-gelatinised starch ester and redispersible acrylic polymer, with use as an accelerated adhesive for joining and adhering panels of gypsum and cement |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860842B (en) * | 2021-10-28 | 2023-05-30 | 河北三棵树涂料有限公司 | Inorganic single-component polymer tile back adhesive and preparation method thereof |
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| GB2140794A (en) * | 1983-05-31 | 1984-12-05 | United States Gypsum Co | Jointing cementitous composition |
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| US5653797A (en) * | 1996-04-26 | 1997-08-05 | National Gypsum Company | Ready mixed setting-type joint compound and method of making same |
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| EP0303071A1 (en) * | 1987-08-08 | 1989-02-15 | Rigips GmbH | Joint filler |
| EP0320982A1 (en) * | 1987-12-17 | 1989-06-21 | PCI Augsburg GmbH | Use of gypsum compositions as adhesives or as jointing materials |
| JPH01305840A (en) * | 1988-06-02 | 1989-12-11 | Marusen Kagaku Kk | Treating material for substrate joint |
| JPH01305389A (en) * | 1988-06-03 | 1989-12-08 | Nec Corp | Detection evading system for submarine |
| EP0496682A1 (en) * | 1991-01-22 | 1992-07-29 | Platres Lafarge | Stucco for joints |
| US5277712A (en) * | 1992-08-20 | 1994-01-11 | Louisiana-Pacific Corporation | Dry mix-type joint compounds, compositions therefrom and methods for filling drywall joints with same |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824606B1 (en) * | 1998-05-20 | 2004-11-30 | Tolsa, S.A. | Additive for special plasters and mortars, compositions containing the additive and utilization of the additive in special plasters and mortars |
| EP1785406A1 (en) * | 2005-11-14 | 2007-05-16 | La Chape Liquide S.A.S. | Method for bonding on gypsum screeds |
| FR2893324A1 (en) * | 2005-11-14 | 2007-05-18 | Chape Liquide Soc Par Actions | METHOD FOR BONDING ON A CHAPE BASED ON CALCIUM SULPHATE. |
| WO2008151879A1 (en) * | 2007-06-14 | 2008-12-18 | Construction Research & Technology Gmbh | Dry construction material mixtures based on calcium sulfate |
| JP2010529270A (en) * | 2007-06-14 | 2010-08-26 | コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー | Calcium sulfate dry construction material mixture |
| AU2008264082B2 (en) * | 2007-06-14 | 2013-03-28 | Construction Research & Technology Gmbh | Dry construction material mixtures based on calcium sulfate |
| WO2015015450A3 (en) * | 2013-08-02 | 2015-07-23 | Costamagna Gabriella | Decorative element, in particular for covering walls and floors, and relative preparation method |
| ITMI20131323A1 (en) * | 2013-08-02 | 2015-02-03 | Gabriella Costamagna | DECORATIVE ELEMENT, IN PARTICULAR FOR THE COATING OF WALLS AND FLOORS, AND ITS PREPARATION PROCEDURE |
| CN104072077A (en) * | 2014-07-02 | 2014-10-01 | 杨连树 | Special interface agent for moisture-proof water-proof gypsum blocks and preparation method of interface agent |
| CN104072077B (en) * | 2014-07-02 | 2016-02-17 | 杨连树 | Moistureproof and waterproof gypsum block special interface agent and preparation method thereof |
| WO2017004120A1 (en) * | 2015-06-30 | 2017-01-05 | Dow Global Technologies Llc | Gypsum compositions containing crosslinked cellulose ethers for mortars with reduced stickiness |
| US10494303B2 (en) | 2015-06-30 | 2019-12-03 | Dow Global Technologies Llc | Gypsum compositions containing crosslinked cellulose ethers for mortars with reduced stickiness |
| WO2023277678A1 (en) * | 2021-07-01 | 2023-01-05 | Vazquez Carrera Daniel | Dry-mix compositions comprising cement, esters of cellulose and ethylene-vinyl acetate copolymer with use in the production of adhesives for cement tiles, glazed ceramic floor tiles, porcelain tiles, glazed ceramic tiles, natural stone, cultured stone, quarry stone and marble |
| WO2023287274A1 (en) * | 2021-07-16 | 2023-01-19 | Vazquez Carrera Daniel | Dry-mix compositions comprising cellulose esters, calcium sulfate dihydrate, pre-gelatinised starch ester and redispersible acrylic polymer, with use as an accelerated adhesive for joining and adhering panels of gypsum and cement |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9720960D0 (en) | 1997-12-03 |
| GB2329895B (en) | 2001-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20081002 |