EP2115078A1 - Process for producing building material for painting or filling containing dehumidified silt and an adhesive - Google Patents

Process for producing building material for painting or filling containing dehumidified silt and an adhesive

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Publication number
EP2115078A1
EP2115078A1 EP08716889A EP08716889A EP2115078A1 EP 2115078 A1 EP2115078 A1 EP 2115078A1 EP 08716889 A EP08716889 A EP 08716889A EP 08716889 A EP08716889 A EP 08716889A EP 2115078 A1 EP2115078 A1 EP 2115078A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
range
process according
dense powder
amount
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Withdrawn
Application number
EP08716889A
Other languages
German (de)
French (fr)
Inventor
Aldo Carminati
Patrizia Gatto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carminati Aldo
GATTO, PATRIZIA
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2115078A1 publication Critical patent/EP2115078A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/02—Compounds of alkaline earth metals or magnesium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/40—Compounds of aluminium
    • C09C1/42—Clays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/10—Treatment with macromolecular organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
    • C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C09D131/04—Homopolymers or copolymers of vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/69—Particle size larger than 1000 nm
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a process for producing building material for painting or filling containing dehumidified silt and an adhesive.
  • Materials such as: paints to paint walls, metals, plastic, ceramics, paper and cardboard, cork, rubber, galvanized materials, wood and PVC; the paints may be applied by means of paintbrush, roller or spraying; fillers, used as filling materials, for instance to carry out decorations or levelling on various kinds of walls are known.
  • Polyacetovinyl adhesives are known, including polyvinylacetate or a polyacetovinyl emulsion.
  • paint consist of a mixture of the following substances: an inert material in the form of powder obtained industrially by a specific process, such as granite (e.g. mica), gypsum, Biancone, calcium carbonate, limestone and silica; a polyacetovinyl adhesive;
  • Such paints generally display a specific gravity in the range between 1,3 kg/dm 3 and 1,8 kg/dm 3 .
  • Some kinds of fillers consist of a mixture of the following substances: an inert material such as those mentioned above; a polyacetovinyl adhesive; lime or adhesive lime and different kinds of cement;
  • inert material is often formed by sand, limestone or gypsum; such materials could be raw. Normally, materials for general use are employed. Such materials, which are extracted, refined, processed and subsequently marketed, display excessively pure features, thus determining a pointless waste of resources. For instance, such materials must be extracted, crushed, sieved and possibly washed with a considerable waste of resources, both in terms of energy consumption and of raw materials, such as water for washing, which generally comes from a waterworks for domestic use and therefore is pointlessly drinkable.
  • the processing of material often includes the following steps: a step of fragmenting the extracted material, carried out in a dry environment by mechanical means; - a step of riddling, generally in a wet environment, by means of which the fragments of material are introduced above an inclined sieve and are sprinkled with water, in order to precipitate the powders, which usually include granules having a diameter in the range between 1 ⁇ m and 1000 ⁇ m, through the interstices of the sieve; the material that does not precipitate is used for the intended purposes; the dusts, which are wet and are in the form of (inert aqueous) silt, are discarded.
  • silt The disposal of silt is complicated, expensive and technically difficult, because it is not easy to find sites suitable for the disposal of materials in a muddy form, such as silt. Strict laws govern the disposal in appropriate areas.
  • such an object is achieved by means of a process for the preparation of building material, characterised in that it comprises the following steps: fragmenting the inert material, riddling said fragmented material by washing to form silt, dehumidifying said silt in order to form a dense powder having a humidity in the range between 1% and 30%, and mixing said dense powder with an adhesive in an amount ratio of dense powder/adhesive from 1/1 to 30/1.
  • Such an adhesive is generally of the po Iy aceto vinyl kind, in particular an aceto vinyl homopolymer in an aqueous dispersion, or an acrylic polymer again in an aqueous dispersion.
  • the building material obtained according to the invention may be used as a non- film- forming paint, which is washable, isolating, elastic and may be applied without a primer, suitable both for indoors and outdoors and results being an excellent protective and dyeing material for the cement. It is also suitable for covering dumps, as a fixing agent for the road surface, for painting swimming-pools as it is water-repellent, and for covering glasshouses.
  • the building material according to the invention may serve as a water- proof filler, which is water resistant, impact resistant, elastic to torsion, it may be used without a primer, it may be painted and sanded on iron, wood, PVC, ceramics, plastics and other materials.
  • the building material according to the invention is not harmful, nor toxic, nor inflammable.
  • the wet cast silt may be pressed in filter presses, centrifugal machines or band filters, during the step of riddling for approximately 30 minutes.
  • the control over the process is a lot better with respect to the traditional decantation in pools and precise values of humidity may be obtained, the optimal value preferably being 20%, as stated above.
  • the obtained dense represents the raw material to obtain the plaster or the paint as disclosed hereinafter.
  • Such a dense is mixed with a po Iy aceto vinyl adhesive (an aceto vinyl homopolymer in an aqueous dispersion) generally in a ratio in the range between 1/1 and 1/30, i.e. for instance an amount of dense varying between 1 and 30 kg is required for 1 kg of adhesive depending on the use.
  • a po Iy aceto vinyl adhesive an aceto vinyl homopolymer in an aqueous dispersion
  • silt could be used containing limestone, marble, clay, silica or other dusts, or possibly mixtures of such materials found in marble, limestone, gypsum or other quarries
  • the po Iy aceto vinyl adhesive employed is characterised by a weight of 1 kg per 1,1 litres of occupied volume (1 kg of adhesive should generally occupy 0,700-1,3 litres in volume), a solid content percentage (dry at 80 0 C for 30 minutes) in the range between 50% and 55% (preferably 52%), a Brookfield viscosity in the range between 9000 m(Pa)s and 15000 m(Pa)s
  • One of the advantages of the present invention consists in that 100% natural colours may be obtained as they are characteristic of the rocks of the extraction quarry. No dyes, i.e. no polluting oxides, need to be added. Therefore, there are no dying costs nor problems with ecocompatibility, the adhesive being commercially available and thus attested. Colours other than the natural ones characteristic of the quarry may be obtained by combining together natural paints obtained according to the invention.
  • the granules have a diameter in the range between 1 ⁇ m and 500 ⁇ m.
  • the particle size of finishing mortar is equal or higher than 500 ⁇ m. Accordingly, it has been found that, if 25 kg of a known mortar are required to shave (with a levelling agent) a surface corresponding to 2-5 m 2 with a shaving thickness of 1-2 mm, then 25 kg of a paint according to the present invention are enough to shave by brush or roller a surface corresponding to 15-25 m 2 (4 times more) with a thickness of 0,5 mm (about 5 times less).
  • These performance data allow for instance the use of the paint on a plaster having no levelling agent, the small particle size allowing to properly fill all of the rough interstices.
  • the economical advantage is obvious: the building material is less expensive to produce (the silt is expensive to dispose of) and the building material required to carry out the same construction is less with improved work times.
  • acrylic polymer adhesives may also be used in an aqueous dispersion (1 kg of said adhesive occupies a volume of about 1 litre, more generally a volume from 0,700 to 1,3 litres as the poly aceto vinyl adhesive).
  • filler includes the insertion of adhesive lime or, as an alternative, the use of decanted lime with even greater specific gravity with respect to the silt for paint.
  • the invention may be marketed by constructing a plant containing bins for each dense powder of a certain silt recovery quarry, one or more adhesive bins, and a control centre adapted to allow the selection of the colour and the application.
  • the inert material may be provided non only from natural quarry, but also from impermanent excavation or masonry debris, more generally recycling material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Nanotechnology (AREA)
  • Dispersion Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Paints Or Removers (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

A building material for painting and filling containing slit with polyacetovinyl adhesive is described.Such a material may be used as a paint or as a filler. Furthermore, there is described a process for obtaining such a building material from the use of by-products of fragmentation operations of rocky materials extracted from quarries.

Description

"Process for producing building material for painting or filling containing dehumidified silt and an adhesive"
* * * * DESCRIPTION
The present invention relates to a process for producing building material for painting or filling containing dehumidified silt and an adhesive. Materials such as: paints to paint walls, metals, plastic, ceramics, paper and cardboard, cork, rubber, galvanized materials, wood and PVC; the paints may be applied by means of paintbrush, roller or spraying; fillers, used as filling materials, for instance to carry out decorations or levelling on various kinds of walls are known. Polyacetovinyl adhesives are known, including polyvinylacetate or a polyacetovinyl emulsion.
Some kinds of paint consist of a mixture of the following substances: an inert material in the form of powder obtained industrially by a specific process, such as granite (e.g. mica), gypsum, Biancone, calcium carbonate, limestone and silica; a polyacetovinyl adhesive;
- dyes.
Such paints generally display a specific gravity in the range between 1,3 kg/dm3 and 1,8 kg/dm3. Some kinds of fillers consist of a mixture of the following substances: an inert material such as those mentioned above; a polyacetovinyl adhesive; lime or adhesive lime and different kinds of cement;
- dyes. The problem of using less expensive inert materials often arises. It must be noted that the inert material is often formed by sand, limestone or gypsum; such materials could be raw. Normally, materials for general use are employed. Such materials, which are extracted, refined, processed and subsequently marketed, display excessively pure features, thus determining a pointless waste of resources. For instance, such materials must be extracted, crushed, sieved and possibly washed with a considerable waste of resources, both in terms of energy consumption and of raw materials, such as water for washing, which generally comes from a waterworks for domestic use and therefore is pointlessly drinkable.
A completely different problem arises in marble or generally inert material quarries, such as sand, gravel, marble, clay, silica, limestone and other quarries.
The processing of material often includes the following steps: a step of fragmenting the extracted material, carried out in a dry environment by mechanical means; - a step of riddling, generally in a wet environment, by means of which the fragments of material are introduced above an inclined sieve and are sprinkled with water, in order to precipitate the powders, which usually include granules having a diameter in the range between 1 μm and 1000 μm, through the interstices of the sieve; the material that does not precipitate is used for the intended purposes; the dusts, which are wet and are in the form of (inert aqueous) silt, are discarded.
The disposal of silt is complicated, expensive and technically difficult, because it is not easy to find sites suitable for the disposal of materials in a muddy form, such as silt. Strict laws govern the disposal in appropriate areas.
It is an object of the present invention to obtain a less expensive building material than the currently employed materials, recovering the silt of the quarries at the same time.
According to the invention, such an object is achieved by means of a process for the preparation of building material, characterised in that it comprises the following steps: fragmenting the inert material, riddling said fragmented material by washing to form silt, dehumidifying said silt in order to form a dense powder having a humidity in the range between 1% and 30%, and mixing said dense powder with an adhesive in an amount ratio of dense powder/adhesive from 1/1 to 30/1.
Such an adhesive is generally of the po Iy aceto vinyl kind, in particular an aceto vinyl homopolymer in an aqueous dispersion, or an acrylic polymer again in an aqueous dispersion.
The building material obtained according to the invention may be used as a non- film- forming paint, which is washable, isolating, elastic and may be applied without a primer, suitable both for indoors and outdoors and results being an excellent protective and dyeing material for the cement. It is also suitable for covering dumps, as a fixing agent for the road surface, for painting swimming-pools as it is water-repellent, and for covering glasshouses.
The building material according to the invention may serve as a water- proof filler, which is water resistant, impact resistant, elastic to torsion, it may be used without a primer, it may be painted and sanded on iron, wood, PVC, ceramics, plastics and other materials.
The building material according to the invention is not harmful, nor toxic, nor inflammable. These and other features of the present invention will become more apparent from the following description of non- limitative practical embodiments of the invention.
A dehumidified silt, or dense powder, or simply designated as "dense", having a specific gravity of 1,5 kg/dm , consists of sand, limestone and clay coming from a gravel quarry of the region of Liguria. Said dense has been obtained during the step of fragmenting and riddling (desired particle size in - A -
the range between 1 μm and 500 μm) with washing following also an additional subsequent decanting step with a flocculant to dehumidify the silt which after washing displays about 60-70% humidity. Said step of decanting takes about 2 hours and allows to obtain a dense having a remaining humidity of 10-30%, preferably 20%.
It is possible to use dense powder in the process according to the invention, substantially without water, namely with a remaining humidity between 1% and 10%.
As an alternative, to accelerate the step of dehumidifying though obtaining the same results, the wet cast silt may be pressed in filter presses, centrifugal machines or band filters, during the step of riddling for approximately 30 minutes. The control over the process is a lot better with respect to the traditional decantation in pools and precise values of humidity may be obtained, the optimal value preferably being 20%, as stated above. The obtained dense represents the raw material to obtain the plaster or the paint as disclosed hereinafter.
Such a dense is mixed with a po Iy aceto vinyl adhesive (an aceto vinyl homopolymer in an aqueous dispersion) generally in a ratio in the range between 1/1 and 1/30, i.e. for instance an amount of dense varying between 1 and 30 kg is required for 1 kg of adhesive depending on the use. For the silt deriving from the quarry in the region of Liguria the following ratios have been obtained: paint for cement paving: 1 kg of adhesive and 4 kg of dense (or in any case a ratio in the range between 1/1 and 1/5); - paint for reinforced concrete: 1 kg of adhesive and 6 kg of dense (or in any case a ratio in the range between 1/1 and 1/7); paint for bare wood: 1 kg of adhesive and 6 kg of dense (or in any case a ratio in the range between 1/1 and 1/7); washable paint for indoors: 1 kg of adhesive and 7 kg of dense (or in any case a ratio in the range between 1/6 and 1/8); paint for metals: 1 kg of adhesive and 5 kg of dense (or in any case a ratio in the range between 1/1 and 1/6); non- film- forming paint for indoors: 1 kg of adhesive and 9 kg of silt (or in any case a ratio in the range between 1/1 and 1/10); - paint for indoor wood: 1 kg of adhesive and 10 kg of silt (or in any case a ratio in the range between 1/1 and 1/11); paint for plasterboard or plywood: 1 kg of adhesive and from 1 to 7 kg of dense; paint covering dumps: 1 kg of adhesive and 10 kg of silt (or in any case a ratio in the range between 1/1 and 1/20); paint for covering glasshouses: 1 kg of adhesive and 20 kg of silt (or in any case a ratio in the range between 1/18 and 1/30). By adding 5-20% cement (without drying nor dyes) to 1 kg of adhesive and 1-10 kg of dense (ratios in the range between 1/1 and 1/10), building bricks may be formed.
As an alternative to the examples set forth above, silt could be used containing limestone, marble, clay, silica or other dusts, or possibly mixtures of such materials found in marble, limestone, gypsum or other quarries
(similar ratios have been found for instance for quarries in the regions of Tuscany, Valle d'Aosta and Piedmont).
The po Iy aceto vinyl adhesive employed is characterised by a weight of 1 kg per 1,1 litres of occupied volume (1 kg of adhesive should generally occupy 0,700-1,3 litres in volume), a solid content percentage (dry at 800C for 30 minutes) in the range between 50% and 55% (preferably 52%), a Brookfield viscosity in the range between 9000 m(Pa)s and 15000 m(Pa)s
(preferably 13000) and a pH in the range between 4 and 5.
One of the advantages of the present invention consists in that 100% natural colours may be obtained as they are characteristic of the rocks of the extraction quarry. No dyes, i.e. no polluting oxides, need to be added. Therefore, there are no dying costs nor problems with ecocompatibility, the adhesive being commercially available and thus attested. Colours other than the natural ones characteristic of the quarry may be obtained by combining together natural paints obtained according to the invention.
Generally, the granules have a diameter in the range between 1 μm and 500 μm.
It should be noted that usually the particle size of finishing mortar is equal or higher than 500 μm. Accordingly, it has been found that, if 25 kg of a known mortar are required to shave (with a levelling agent) a surface corresponding to 2-5 m2 with a shaving thickness of 1-2 mm, then 25 kg of a paint according to the present invention are enough to shave by brush or roller a surface corresponding to 15-25 m2 (4 times more) with a thickness of 0,5 mm (about 5 times less). These performance data allow for instance the use of the paint on a plaster having no levelling agent, the small particle size allowing to properly fill all of the rough interstices. The economical advantage is obvious: the building material is less expensive to produce (the silt is expensive to dispose of) and the building material required to carry out the same construction is less with improved work times.
Other kinds of adhesive might be used, although the po Iy aceto vinyl adhesive provides better results, supported by decades of successful use in construction. In any case, acrylic polymer adhesives may also be used in an aqueous dispersion (1 kg of said adhesive occupies a volume of about 1 litre, more generally a volume from 0,700 to 1,3 litres as the poly aceto vinyl adhesive). For example it may be used an acrylic polymer with a solid content percentage (dry at 1100C for 15 minutes) in the range between 49% and 51% (preferably 50%), a Brookfield viscosity in the range between 4000 m(Pa)s and 8000 m(Pa)s (preferably 7000) and a pH in the range between 8 and 9.
Another process, such as for instance evaporation, may be used instead of decantation. The production of filler includes the insertion of adhesive lime or, as an alternative, the use of decanted lime with even greater specific gravity with respect to the silt for paint.
The invention may be marketed by constructing a plant containing bins for each dense powder of a certain silt recovery quarry, one or more adhesive bins, and a control centre adapted to allow the selection of the colour and the application.
Following electromechanical means will fill and seal paint cans which are ready to be sent anywhere required.
Further it is possible to load loose product in cistern.
The inert material may be provided non only from natural quarry, but also from impermanent excavation or masonry debris, more generally recycling material.

Claims

1. Process for the preparation of a building material, characterised in that it comprises the following steps: fragmenting the inert material, riddling said fragmented material by washing to form silt, dehumidifying said silt in order to form a dense powder having a humidity in the range between 1% and 30%, and mixing said dense powder with an adhesive in an amount ratio of dense powder/adhesive from 1/1 to 30/1.
2. Process according to claim 1, characterised in that the dense powder has a particle size in the range between 1 μm and 500 μm.
3. Process according to any of the preceding claims, characterised in that said adhesive is in an aqueous dispersion.
4. Process according to claim 3, characterised in that said adhesive is an acetovynil homopolymer in an aqueous dispersion.
5. Process according to claim 3, characterised in that said adhesive is an acrylic polymer in an aqueous dispersion.
6. Process according to any of the preceding claims, characterised in that 1 kg of adhesive occupies a volume in the range between 0,7 and 1,3 litres.
7. Process according to any of the preceding claims, characterised in that the amount of adhesive and of dense powder is in a range between 1/1 and 1/5 for application on a cement paving.
8. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/7 for application on reinforced concrete.
9. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/7 for application on bare wood.
10. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/8 for application as a washable paint for indoors.
11. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/6 for application on metals.
12. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/10 for application as a non- film- forming paint for indoors.
13. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/11 for application on indoor wood.
14. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/7 for application on plasterboard or plywood.
15. Process according to any of claims 1-6, characterised in that the amount of adhesive and dense powder is in a range between 1/1 and 1/10 for the construction of bricks, 5-20% cement also being included.
16. Building material characterised in that it comprises dense powder, having a humidity in the range between 1% and 30%, which is obtained by dehumidification of cast silt from the washing of inert material, and adhesive in an amount ratio in the range between 1/1 and 30/1.
EP08716889A 2007-02-22 2008-02-15 Process for producing building material for painting or filling containing dehumidified silt and an adhesive Withdrawn EP2115078A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000342A ITMI20070342A1 (en) 2007-02-22 2007-02-22 BUILDING MATERIAL FOR PAINTING OR STORAGE CONTAINING LIMO WITH POLIACETOVINYL GLUE AND REAL PRODUCTION PROCEDURE
PCT/EP2008/051886 WO2008101879A1 (en) 2007-02-22 2008-02-15 Process for producing building material for painting or filling containing dehumidified silt and an adhesive

Publications (1)

Publication Number Publication Date
EP2115078A1 true EP2115078A1 (en) 2009-11-11

Family

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Application Number Title Priority Date Filing Date
EP08716889A Withdrawn EP2115078A1 (en) 2007-02-22 2008-02-15 Process for producing building material for painting or filling containing dehumidified silt and an adhesive

Country Status (3)

Country Link
EP (1) EP2115078A1 (en)
IT (1) ITMI20070342A1 (en)
WO (1) WO2008101879A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116708A (en) * 1975-09-04 1978-09-26 Lion Oil Company Asphalt coating compositions
RU2107077C1 (en) * 1995-11-17 1998-03-20 Закрытое акционерное общество "Компания "Гамма-Н" Carbonate-containing filler for adhesives, rubber and friction materials
US6146453A (en) * 1998-09-18 2000-11-14 Nigro; August M. Method and apparatus for recovering and recycling sludge and product thereof
FR2784371B1 (en) * 1998-10-07 2000-12-15 Pluss Stauffer Ag NOVEL CRUSHED NATURAL CALCIUM CARBONATES, POSSIBLY TREATED WITH FATTY ACID OR ITS SALT, THEIR APPLICATION AS RHEOLOGY REGULATORS IN POLYMERIC COMPOSITIONS
US7488522B2 (en) * 2001-07-03 2009-02-10 Northern Elastomeric, Inc. Fire-resistant, self-adhesive rolled roofing membrane and method of making same

Non-Patent Citations (1)

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Title
See references of WO2008101879A1 *

Also Published As

Publication number Publication date
WO2008101879A1 (en) 2008-08-28
ITMI20070342A1 (en) 2008-08-23

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