WO2003020661A1 - Coloured dry mortar composition - Google Patents

Coloured dry mortar composition Download PDF

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Publication number
WO2003020661A1
WO2003020661A1 PCT/GB2002/004027 GB0204027W WO03020661A1 WO 2003020661 A1 WO2003020661 A1 WO 2003020661A1 GB 0204027 W GB0204027 W GB 0204027W WO 03020661 A1 WO03020661 A1 WO 03020661A1
Authority
WO
WIPO (PCT)
Prior art keywords
mix
plaster
powder
pigment
dry
Prior art date
Application number
PCT/GB2002/004027
Other languages
French (fr)
Other versions
WO2003020661A8 (en
Inventor
Candida Joy Bowman
Original Assignee
Candida Joy Bowman
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Candida Joy Bowman filed Critical Candida Joy Bowman
Priority to GB0407677A priority Critical patent/GB2395716B/en
Publication of WO2003020661A1 publication Critical patent/WO2003020661A1/en
Publication of WO2003020661A8 publication Critical patent/WO2003020661A8/en

Links

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
    • 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
    • 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
    • C04B14/30—Oxides other than silica
    • C04B14/308—Iron oxide
    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • 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

Definitions

  • the present invention relates to compositions of building materials, such as plaster, to methods of preparing these and to their use in various building applications.
  • Plaster is a well known building material, used routinely as a coating for walls, ceilings and the like in building work. Dry plaster powder is mixed with water, applied to a surface whereupon it dries to form a plaster finish. Other building materials supplied in dry powder form for mixing in this way include cement and concrete .
  • plaster and concrete are applied in its natural state, and therefore dries to form a surface, which is grey or pink in colour.
  • these surfaces visible surfaces such as walls, these are then decorated to the desired colour using paint, of other coverings.
  • internal walls may be covered with wallpaper or the like, and external walls may be painted.
  • a number of pigments are offered for sale for inclusion inter alia into plaster.
  • the colour achieved will be highly dependent upon the amount of pigment added in any particular batch, and may therefore may require some trial and error on the part of the end-user before the desired result is achieved.
  • a pre-mix comprising a powdered building material and a powder pigment, wherein the pigment is present in a sufficient amount to produce a predetermined colour in material produced from said pre-mix.
  • powdered building material relates to materials which, when mixed with water and optionally other building ingredients, are used in building to form solid structures or coatings.
  • powdered building materials used in the pre-mix of the invention are plaster, cement or concrete powders.
  • they are plaster or concrete powders, and most preferably the powdered building material is dry plaster powder.
  • pre-mix refers to formulated compositions in which the dry powdered building material and the dry pigment are in intimate admixture.
  • dry plaster powder refers to plaster mixes such as those available commercially, as internal plasters which can produce moderate impact surfaces, as well as external plasters which can produce higher impact surfaces .
  • internal plasters such as Thistle universal Onecoat available from British Gypsum.
  • Such mixtures will generally comprise plaster obtainable by heating the mineral gypsum, of which a main constituent will be the hemihydrate of calcium sulphate. They may also contain further constituents such as binders, fillers, cements, aggregates and improving additives such as additives to accelerate setting.
  • Suitable pigments for use in the pre-mixes of the invention include earth or mineral pigments such as aluminium and iron oxide pigments, and vegetable pigments such as casein pigments, provided they are in the form of dry powders .
  • One or more, for example up to four, of the pigments may be combined with the dry building material powder in specific amounts to produce a desired colour.
  • at least lOOg of pigment should be included in each 25 kilo of dry plaster powder.
  • the pre-mix contains from 200g- 7.
  • the specific amounts of pigments, either single or combined colours, necessary to produce a particular plaster colour represents a formula, which may be carefully repeated in a manufacturing environment, to ensure that the colour may be produced consistently on site.
  • the various colours available may be illustrated to customers using one or more display charts in which samples of colours are provided for selection.
  • the invention provides a method of preparing a pre-mix as described above, said method comprising mixing dry building material powder with an appropriate amount of pigment to produce the desired colour in the final prepared material, and placing the pre-mix in a water-proof package.
  • the mixing of the dry building material powder and the pigment is suitably effected using a conventional mixing machine. Care should be taken however to ensure that the temperature of the mixture is not allowed to rise significantly, for example not above 30°C, and preferably not above 25°C, and most preferably not above 15 °C to ensure that the pigments are not denatured or changed during the procedure .
  • the pre-mix of the invention is suitably placed in water-proof packaging, in particular in degradable plastics bags .
  • the bags are suitably sized and strong enough to carry regular units of the appropriate building material. In the case of plaster, for example, 25kg, 10kg or 5kg bags are routinely used.
  • the pre-mix may then be used in the normal way.
  • plaster pre-mix for example, it will be mixed with water to form a paste, applied to a surface such as a wall etc. or placed in a mould. On drying, it will produce a surface with the desired colour, thus eliminating the need for further decoration.
  • the invention provides a method for forming a coloured surface or object, said method comprising mixing a pre-mix as described above with water to form a paste, applying said paste to the surface or mould, and allowing it to dry.
  • the invention provides a reliable way to produce a range of consistently coloured materials such as plasters, for use in building, decorative arts, such as plaster moulding, casting etc. and elsewhere.
  • the need to carry out pigment mixing operations on site is eliminated.
  • a pre-mixed plaster product was prepared using Thistle Universal Onecoat (British Gypsum product) as the base plaster.
  • a selection of pigments were obtained from the following sources:
  • Pigments were mixed into the base plaster gradually.
  • the plaster was poured into the mixing machine vessel in layers, adding the pigment proportionately to the amount of plaster, so that the pigment is evenly distributed throughout the plaster.
  • the machine was halted regularly and the plaster / pigment mix merged with hand held implements by scooping from the bottom of the mix to expose plaster which has not yet combined with pigment .
  • the environment where the mixing takes place was kept clear of possible contamination from air - borne objects, food, drink, human, or animal hair.
  • One, two, three, four, or more different colour pigments were used in specific quantities to create the shades to a repeatable formula .
  • the mixed plaster and pigment was then bagged in sizes of 25kg, 10kg and 5kg weights.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Paints Or Removers (AREA)

Abstract

A pre-mix comprising a dry building material powder, such as plaster powder, and a powder pigment, wherein the pigment is present in a sufficient amount to produce a predetermined colour in material produced from said pre-mix. Methods for forming the pre-mix and their use are also described.

Description

COLOURED DRY ORTAR COMPOSITION
The present invention relates to compositions of building materials, such as plaster, to methods of preparing these and to their use in various building applications.
Plaster is a well known building material, used routinely as a coating for walls, ceilings and the like in building work. Dry plaster powder is mixed with water, applied to a surface whereupon it dries to form a plaster finish. Other building materials supplied in dry powder form for mixing in this way include cement and concrete .
Generally speaking, plaster and concrete, are applied in its natural state, and therefore dries to form a surface, which is grey or pink in colour. When these surfaces visible surfaces such as walls, these are then decorated to the desired colour using paint, of other coverings. For example, internal walls may be covered with wallpaper or the like, and external walls may be painted.
This decoration is labour intensive, particularly where new houses are being build as it is generally necessary for the builder to undertake this work, for all rooms in the house, before sale.
A number of pigments are offered for sale for inclusion inter alia into plaster. The colour achieved will be highly dependent upon the amount of pigment added in any particular batch, and may therefore may require some trial and error on the part of the end-user before the desired result is achieved.
Furthermore, consistent colour amongst different batches of plaster may be difficult to achieve in an "on-site" situation. Α method of manufacturing dyed plaster is described for example in WO103899A. In this method, pressurised water containing pigmented pastes or powders is transferred into the mixer in which plaster powder is being mixed with water. This therefore introduces a further step into the on-site preparation of the plaster. Furthermore, the colour which is achieved in this manner will be dependent upon the amount of pigment added, and this may be variable depending upon factors such as the operator etc. Consequently, colour inconsistencies may occur, which may be unacceptable, particularly where large areas are to be covered in similarly coloured material.
According to the present invention there is provided a pre-mix comprising a powdered building material and a powder pigment, wherein the pigment is present in a sufficient amount to produce a predetermined colour in material produced from said pre-mix.
As used herein the expression "powdered building material" relates to materials which, when mixed with water and optionally other building ingredients, are used in building to form solid structures or coatings. In particular, powdered building materials used in the pre-mix of the invention are plaster, cement or concrete powders. Preferably they are plaster or concrete powders, and most preferably the powdered building material is dry plaster powder.
The term "pre-mix" refers to formulated compositions in which the dry powdered building material and the dry pigment are in intimate admixture.
The applicants have found that the formation of pre-mixes of this type do not significantly adversely affect .the shelf-life of the dry building material powder. Furthermore, consistent and reliable colours may be achieved without requiring complex mixing operations to be effected on site. As used herein, the term "dry plaster powder" refers to plaster mixes such as those available commercially, as internal plasters which can produce moderate impact surfaces, as well as external plasters which can produce higher impact surfaces . Preferably they are internal plasters such as Thistle universal Onecoat available from British Gypsum. Such mixtures will generally comprise plaster obtainable by heating the mineral gypsum, of which a main constituent will be the hemihydrate of calcium sulphate. They may also contain further constituents such as binders, fillers, cements, aggregates and improving additives such as additives to accelerate setting.
Suitable pigments for use in the pre-mixes of the invention include earth or mineral pigments such as aluminium and iron oxide pigments, and vegetable pigments such as casein pigments, provided they are in the form of dry powders .
One or more, for example up to four, of the pigments may be combined with the dry building material powder in specific amounts to produce a desired colour. In order to achieve suitable colour levels, it has been found for example, that at least lOOg of pigment should be included in each 25 kilo of dry plaster powder. Suitably, the pre-mix contains from 200g- 7. Okilograms of pigment powder per 25kilo of dry plaster powder, and preferably from 250g-5.625Kg of pigment powder per 25 kilo of dry plaster powder. Generally speaking, the more pigment added to the plaster, the deeper the shade of final plaster obtained. The specific amounts of pigments, either single or combined colours, necessary to produce a particular plaster colour represents a formula, which may be carefully repeated in a manufacturing environment, to ensure that the colour may be produced consistently on site.
The various colours available may be illustrated to customers using one or more display charts in which samples of colours are provided for selection. In a further aspect, the invention provides a method of preparing a pre-mix as described above, said method comprising mixing dry building material powder with an appropriate amount of pigment to produce the desired colour in the final prepared material, and placing the pre-mix in a water-proof package.
The mixing of the dry building material powder and the pigment is suitably effected using a conventional mixing machine. Care should be taken however to ensure that the temperature of the mixture is not allowed to rise significantly, for example not above 30°C, and preferably not above 25°C, and most preferably not above 15 °C to ensure that the pigments are not denatured or changed during the procedure .
This may be achieved by ensuring that the mixing proceeds slowly, and or by periodically halting the mixing process to allow the mixture to cool. It may also assist if building material powder and pigment are introduced into the mixture in relatively small amounts.
Once thoroughly admixed, the pre-mix of the invention is suitably placed in water-proof packaging, in particular in degradable plastics bags . The bags are suitably sized and strong enough to carry regular units of the appropriate building material. In the case of plaster, for example, 25kg, 10kg or 5kg bags are routinely used.
The pre-mix may then be used in the normal way. In the case of plaster pre-mix for example, it will be mixed with water to form a paste, applied to a surface such as a wall etc. or placed in a mould. On drying, it will produce a surface with the desired colour, thus eliminating the need for further decoration.
Thus in a further aspect, the invention provides a method for forming a coloured surface or object, said method comprising mixing a pre-mix as described above with water to form a paste, applying said paste to the surface or mould, and allowing it to dry.
Thus the invention provides a reliable way to produce a range of consistently coloured materials such as plasters, for use in building, decorative arts, such as plaster moulding, casting etc. and elsewhere. The need to carry out pigment mixing operations on site is eliminated.
The invention will now be illustrated by way of Example. Example
A pre-mixed plaster product was prepared using Thistle Universal Onecoat (British Gypsum product) as the base plaster.
A selection of pigments were obtained from the following sources:
Pigments
La Tienda - Earth and Mineral Pigments (powder)
Auro - Lime - Casein coloured paints (powder) Ecotec - Natural pigments (powder)
A selection of these were mixed into the base plaster with a machine - Imermix 60 (Imer International s.p.a. product).
Pigments were mixed into the base plaster gradually. The plaster was poured into the mixing machine vessel in layers, adding the pigment proportionately to the amount of plaster, so that the pigment is evenly distributed throughout the plaster.
The machine was halted regularly and the plaster / pigment mix merged with hand held implements by scooping from the bottom of the mix to expose plaster which has not yet combined with pigment . The environment where the mixing takes place was kept clear of possible contamination from air - borne objects, food, drink, human, or animal hair.
One, two, three, four, or more different colour pigments were used in specific quantities to create the shades to a repeatable formula .
The mixed plaster and pigment was then bagged in sizes of 25kg, 10kg and 5kg weights.

Claims

Claims
1. A pre-mix comprising a powdered building material and a powder pigment, wherein the pigment is present in a sufficient amount to produce a predetermined colour in material produced from said pre-mix.
2. A pre-mix according to claim 1 wherein the powdered building material is plaster or concrete powder.
3. A pre-mix according to claim 2 wherein the powdered building material is plaster powder.
4. A pre-mix according to claim 3 which comprises at least 200g of pigment for each 25 kilo of dry plaster powder.
5. A pre-mix according to claim 4 which comprises from 250g- 5.25kilograms per 25kilo of dry plaster powder.
6. A pre-mix according to any one of the preceding claims wherein the powder pigment is a mineral or vegetable pigment
7. A pre-mix according to any one of the preceding claims which includes up to four powder pigments .
8. A method of preparing a pre-mix according to any one of the preceding claims, said method comprising mixing dry building material powder with an appropriate amount of pigment to produce the desired colour in the final prepared material, and placing the pre-mix in a water-proof package.
9. A method according to claim 8 wherein the mixing is effected such that the temperature in the mixture does not exceed 30°C.
10. A method according to claim 9 wherein the mixing is effected such that the temperature in the mixture does not exceed 25°C.
11. A method for forming a coloured surface or object, said method comprising mixing a pre-mix according to any one of claims 1 to 7 with water to form a paste, applying said paste to the surface or mould, and allowing it to dry.
12. A pre-mix substantially as hereinbefore described.
13. A method of forming a plaster pre-mix substantially as hereinbefore described with reference to the Example.
PCT/GB2002/004027 2001-09-05 2002-09-03 Coloured dry mortar composition WO2003020661A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0407677A GB2395716B (en) 2001-09-05 2002-09-03 Preparation of coloured plaster

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0121454.3 2001-09-05
GBGB0121454.3A GB0121454D0 (en) 2001-09-05 2001-09-05 Composition

Publications (2)

Publication Number Publication Date
WO2003020661A1 true WO2003020661A1 (en) 2003-03-13
WO2003020661A8 WO2003020661A8 (en) 2003-05-08

Family

ID=9921536

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/004027 WO2003020661A1 (en) 2001-09-05 2002-09-03 Coloured dry mortar composition

Country Status (2)

Country Link
GB (2) GB0121454D0 (en)
WO (1) WO2003020661A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017567A3 (en) * 2007-04-24 2008-12-02 Man Andy Plaster material for walls and ceilings, contains colored pigment and iron oxide additives
GB2499309A (en) * 2012-01-10 2013-08-14 Mark Andrew Foreman A container for powdered pigments
EP2650270A4 (en) * 2010-12-10 2016-04-13 Yoshino Gypsum Co Dried gypsum composition and gypsum-based coating

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB451112A (en) * 1935-01-28 1936-07-28 John Stanley Dunn Improvements in or relating to coloured plasters
GB454719A (en) * 1935-11-11 1936-10-07 Clifford Shaw Improved manufacture of artificial stone
GB595316A (en) * 1944-11-03 1947-12-02 Lewis Berger & Sons Ltd Improvements in or relating to a method of plastering and compositions therefor
US2993016A (en) * 1958-07-16 1961-07-18 Sucetti Glenn Dry plaster mix comprising aggregate, clay, cellulose derivative and amine aldehyde resin
US4420525A (en) * 1982-02-11 1983-12-13 Parks David M Thin decorative cementitious veneers and a method for making same
DD253422A1 (en) * 1986-10-17 1988-01-20 Wbk Erfurt Veb DRY MUSHROOM MIXTURE FOR STRIKING OR SPELLING MEASURES
FR2728889A1 (en) * 1995-01-03 1996-07-05 Rhone Poulenc Chimie Pigmented mineral binder compsn.
US6171655B1 (en) * 1999-04-16 2001-01-09 Takachiho Corp. Method of preparing constructional finished wallboard
WO2001003899A1 (en) * 1999-07-08 2001-01-18 Jedrzejewski Andrzej A method of manufacturing dyed plaster masses

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB593316A (en) * 1945-06-13 1947-10-14 Westland Aircraft Ltd Improvements in or relating to fastening devices

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB451112A (en) * 1935-01-28 1936-07-28 John Stanley Dunn Improvements in or relating to coloured plasters
GB454719A (en) * 1935-11-11 1936-10-07 Clifford Shaw Improved manufacture of artificial stone
GB595316A (en) * 1944-11-03 1947-12-02 Lewis Berger & Sons Ltd Improvements in or relating to a method of plastering and compositions therefor
US2993016A (en) * 1958-07-16 1961-07-18 Sucetti Glenn Dry plaster mix comprising aggregate, clay, cellulose derivative and amine aldehyde resin
US4420525A (en) * 1982-02-11 1983-12-13 Parks David M Thin decorative cementitious veneers and a method for making same
DD253422A1 (en) * 1986-10-17 1988-01-20 Wbk Erfurt Veb DRY MUSHROOM MIXTURE FOR STRIKING OR SPELLING MEASURES
FR2728889A1 (en) * 1995-01-03 1996-07-05 Rhone Poulenc Chimie Pigmented mineral binder compsn.
US6171655B1 (en) * 1999-04-16 2001-01-09 Takachiho Corp. Method of preparing constructional finished wallboard
WO2001003899A1 (en) * 1999-07-08 2001-01-18 Jedrzejewski Andrzej A method of manufacturing dyed plaster masses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017567A3 (en) * 2007-04-24 2008-12-02 Man Andy Plaster material for walls and ceilings, contains colored pigment and iron oxide additives
EP2650270A4 (en) * 2010-12-10 2016-04-13 Yoshino Gypsum Co Dried gypsum composition and gypsum-based coating
GB2499309A (en) * 2012-01-10 2013-08-14 Mark Andrew Foreman A container for powdered pigments

Also Published As

Publication number Publication date
GB2395716B (en) 2006-03-22
GB2395716A (en) 2004-06-02
WO2003020661A8 (en) 2003-05-08
GB0121454D0 (en) 2001-10-24
GB0407677D0 (en) 2004-05-12

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