CA1150908A - Mineral filler - Google Patents
Mineral fillerInfo
- Publication number
- CA1150908A CA1150908A CA000363068A CA363068A CA1150908A CA 1150908 A CA1150908 A CA 1150908A CA 000363068 A CA000363068 A CA 000363068A CA 363068 A CA363068 A CA 363068A CA 1150908 A CA1150908 A CA 1150908A
- Authority
- CA
- Canada
- Prior art keywords
- micron
- ratio
- weight
- mineral filler
- particles
- 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.)
- Expired
Links
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
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
-
- 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
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 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
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Paints Or Removers (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A mineral filler such as a natural calcium carbonate is provided having particles in the ratio % by weight of a size less than 1 micron % by weight of a size less than .2 micron which is greater than 3.5, Such mineral fillers are particularly adapted for providing high gloss in paints and paper-coating compositions.
A mineral filler such as a natural calcium carbonate is provided having particles in the ratio % by weight of a size less than 1 micron % by weight of a size less than .2 micron which is greater than 3.5, Such mineral fillers are particularly adapted for providing high gloss in paints and paper-coating compositions.
Description
~l`S~908 The present :invention relates to a milleral i11er.
In the comminution of mineral fillers, such as alkaline earth carbonates, kaolin, talc, barite, etc., particles fall in a relatively broad Gauss range of size distribution, i.e., with very different diameters For certain uses a wide, grain-size range is desirable, especially for utilization in coatings, mastics and resin com-positions that are to have a high particle density, i.e., a low hollow-space volume between the particles In the latter appli-cations, relatively coarse mineral fillers are employed in whichthe granule size distribution is in ~ range extending -from 5 microns up to several millimeters Utilizing a method of pressure comlllinution particle sizes are obtained below 5 microns, the distribution of particle sizes obtained (depending on the nature of the comminuted sub-stance) extending from 5 microns down to extremely fine parti-cles that are smaller than 0 1 micron, namely 0.05 micron The majority of the products obtained yield, however, grain size distrubitions that approximately follow the law of probability and correspond to the equation:
Y -= .l'C -U (d-dm)2 where y - the frequency of the diameters of the particles with a diameter d a = a constant corresponding to the maximum value of y dm = the mean diameter U = the coefficient of equality For many applications, such as the manufacture of gloss or luster paints, coated papers and plastics, it is de-sirable to achieve the highest possible degree of fineness ofthe mineral filler particles. Such fiMeness facilitates achiev-ing the following goals: an improvement of the surface state, -1- F~
~5~0~
an improvement o~ the gloss, and enhancement of the mechanical resistance o~ the plastic mixtures Accordingly, numerous attempts have been made in the prior art to improve the comminution techniques and to generate extremely fine mineral fillers comprising, for example, 90-100%
of particles smaller than 5 microns Also, natural calcium car-bonate is now employed in gloss paints and coated papers as a partial replacement for kaolin.
In the present general state of the art it is assumed that the luster or gloss of paints and coated papers increases with the increase in fineness o-f the pigment or mineral filler used, which assumption would seem quite logical.
Contrary to the foregoing assumption, however, in German application P 28 08 ~25 it has been disclosed that extreme-ly fine particles, the sizes of which lie under 0.2 micron, have a negative effect on the gloss of paints and coated papers In addition, further disadvantages accompany the increase of the specific surface, for example, a high binder requirement, and increased viscosity in the case O:e paints and coatings for papers.
In the case of certain plastics, such a polyvinyl chloride or cros.s-linked polyethylene, dielectric properties are reduced.
It is an obiect Oe this invention to avoid the fore-going disadva.llta.ges O r the prior art and to provide a mineral filler with su~stantially improved properties In accordance with this invention it has been found that the ratio:
R -- % by weight of particles ~ 1 micron ~ -by weight of particles < 0~.2 m~icron has a considerable influence on the properties of the pigment or of the mineral filler The higher this ratio R is, the bet-ter are the properties of the filler, i e , the better the glossor luster of sur~aces in the case o~ paints and coated papers The present invention provides a mineral filler having ~5~()8 particles which effect a ratio:
% by weight of a size less than 1 micron ~0 by wëight o-i a size less than 2 micron of greater than 3 5.
The present invention also provides in a high-gloss coating c~mposition the improvement comprising the utilization of a mineral filler having particles which effect a ratio % by weight of a size less than 1 micron % by welght of a slze--ress than .~ micron of greater than 3.5.
In the majority of the mineral fillers currently in use, such as natural calcium carbonates (chalks or calc-spars) the ratio R lies between 1 5 and 3.5 A calcium carbonate that con-tains, for example, 99% by weight of particles smaller than ~
microns and 75% of particles smaller than 1 micron, presents 25%
and more o~ particles that are smaller than 0 2 micron i e , it has a ratio of R = 3.
This invention lies in utilizing a particle ratio R
that is greater than 3 5 and lies pre~erably between ~ and 10 Very good results are acllieved ~hen }~ -= 5.
The laws that dctcr~ le the pllcnomena of tlle comminu-tion process are such that tlle hirller the percellta~e of particles that are smaller than 1 micron! the more likely the increase in percentage of particles tllat aI'e smaller than 0 2 micron Never-theless, it is possible to control the comminution conditions in such a way that tlle perce~ntage oi` particles under 1 micron in si~e increases very much more rapidly than the percentage of particles under 0 2 micron, as described in our co-pending Canadian patent application Serial No.363,0~7 which is filed con-currently herewith and entitled "PROCESS FOR THE PRODUCTION OF
MINERAL FILLERS BY WET COMMINUTION." The process of this co-pending application is characterized iD that the comminution is carried out without dispersing agents and at a solid substance concentration of less than 60% by weight, in that the comminuted suspension is filtered and the filter cake containin~ about 20%
of water is either dried or, by addition of a dispersing agent, converted into a high-solids suspension with low viscosity.
Examples of products encompassed within this invention comprise natural calcium carbonates with the following properties, all percentage data of the tabulated particle size relating to weight:
% ~ 2 microns %~ 1 micron % ~ 0 2 micron R = % 1 micron % .2-micron 98 75 15 5 0, 98 77 17 ~ 53 98 80 ~5 5,33 The ratio R can also reach very much higher values, for example, values of over 8, as with %~ 2 microns = 98 % c 1 micron - 72 5 % ~ 0,2 micron = 7 The latter composition provides a ratio R of 10 35, Accorcling to this invention, it has been found that the values for an R between ~ and 10, especially in the vicinity of 5 are those that effect the best possible compromise between the efficiency of the product perLormance and economical pro-duction conditions, ~ Irther advantages, features and objects of this invention will become apparent from a reading of the following examples employing fillers made in accordance with this in-vention 1 Paints Alkyd and emulsion paints (acryl-styrene) are prepared according to the paint formulations appearing hereinafter. Such paints contain pigments not readily dissolved in water which are dispersed in a selected medium in the paint Such paints ~lS~9~)8 utilize natural calcium carbonates in the form of chalk and calc-spar having the following granulometric properties of Table I, Table I
_ ._ %~ 2 micron %~ 1 micron % c 0,2 micron R
- Product No, 1 99 90 31 2,9 - Product No, 2 96 75 26 2.88 - Product No, 3 97 70 15 4,67 - Product No, 4 99,5 85 15 5,66 . L
After the application of paint films to a substrate and : complete drying, the gloss or luster is measured with the aid of a photogonimeter, i,e,, an angle-measuring instrument of type GP 2 of the Zeiss firm, The results obtained appear from the follow-ing Table II, Table II
. .
ProductNo, 1 No, 2 No, 3 No, ~
R = 2,9 2,88 ~,67 5,66 ... .. __ .. _ .. __ Emulsion paint - I.uster a.t 60 5,6 22,9 33,9 36,9 - Luster at 70 ~12,4 ~42,3 53,7 56,4 __ . _ Alkyd paint - Luster at 60 (after 1 week) 1,7 21,1 42,7 49,7 - Luster at 60 (after 1 month) 1,2 18.9 37,3 44.7 .. .~ . ~ ~ .. _ ___ ~lSr~C)8 As is evident from Table II, the calcium carbonates used yield increase gloss wi.th an increase in the ratio R.
Emulsion Paint . . .
P~aw Materials Parts by Weight .
Propylene glycol 6 Sodium polyacrylate (40%) 0,5 TiO2-rutile 19 CaCo3 12,5 NH40H (25%) 0.7 10 Acryl-styrene dispersion (50%) 50 Butyl glycol 1.5 Water 3 Methyl cellulose (10%) 2 95,2 Satinized Alkyd Paint Raw ~aterials Parts by Weight Alkyd resin (65%) 240 Soya lecithin 5 TiO2-rutile 200 C Co3 300 Drying agent, e,g,, cobnlt n~plltllenate 10 White spirits 93 8~8
In the comminution of mineral fillers, such as alkaline earth carbonates, kaolin, talc, barite, etc., particles fall in a relatively broad Gauss range of size distribution, i.e., with very different diameters For certain uses a wide, grain-size range is desirable, especially for utilization in coatings, mastics and resin com-positions that are to have a high particle density, i.e., a low hollow-space volume between the particles In the latter appli-cations, relatively coarse mineral fillers are employed in whichthe granule size distribution is in ~ range extending -from 5 microns up to several millimeters Utilizing a method of pressure comlllinution particle sizes are obtained below 5 microns, the distribution of particle sizes obtained (depending on the nature of the comminuted sub-stance) extending from 5 microns down to extremely fine parti-cles that are smaller than 0 1 micron, namely 0.05 micron The majority of the products obtained yield, however, grain size distrubitions that approximately follow the law of probability and correspond to the equation:
Y -= .l'C -U (d-dm)2 where y - the frequency of the diameters of the particles with a diameter d a = a constant corresponding to the maximum value of y dm = the mean diameter U = the coefficient of equality For many applications, such as the manufacture of gloss or luster paints, coated papers and plastics, it is de-sirable to achieve the highest possible degree of fineness ofthe mineral filler particles. Such fiMeness facilitates achiev-ing the following goals: an improvement of the surface state, -1- F~
~5~0~
an improvement o~ the gloss, and enhancement of the mechanical resistance o~ the plastic mixtures Accordingly, numerous attempts have been made in the prior art to improve the comminution techniques and to generate extremely fine mineral fillers comprising, for example, 90-100%
of particles smaller than 5 microns Also, natural calcium car-bonate is now employed in gloss paints and coated papers as a partial replacement for kaolin.
In the present general state of the art it is assumed that the luster or gloss of paints and coated papers increases with the increase in fineness o-f the pigment or mineral filler used, which assumption would seem quite logical.
Contrary to the foregoing assumption, however, in German application P 28 08 ~25 it has been disclosed that extreme-ly fine particles, the sizes of which lie under 0.2 micron, have a negative effect on the gloss of paints and coated papers In addition, further disadvantages accompany the increase of the specific surface, for example, a high binder requirement, and increased viscosity in the case O:e paints and coatings for papers.
In the case of certain plastics, such a polyvinyl chloride or cros.s-linked polyethylene, dielectric properties are reduced.
It is an obiect Oe this invention to avoid the fore-going disadva.llta.ges O r the prior art and to provide a mineral filler with su~stantially improved properties In accordance with this invention it has been found that the ratio:
R -- % by weight of particles ~ 1 micron ~ -by weight of particles < 0~.2 m~icron has a considerable influence on the properties of the pigment or of the mineral filler The higher this ratio R is, the bet-ter are the properties of the filler, i e , the better the glossor luster of sur~aces in the case o~ paints and coated papers The present invention provides a mineral filler having ~5~()8 particles which effect a ratio:
% by weight of a size less than 1 micron ~0 by wëight o-i a size less than 2 micron of greater than 3 5.
The present invention also provides in a high-gloss coating c~mposition the improvement comprising the utilization of a mineral filler having particles which effect a ratio % by weight of a size less than 1 micron % by welght of a slze--ress than .~ micron of greater than 3.5.
In the majority of the mineral fillers currently in use, such as natural calcium carbonates (chalks or calc-spars) the ratio R lies between 1 5 and 3.5 A calcium carbonate that con-tains, for example, 99% by weight of particles smaller than ~
microns and 75% of particles smaller than 1 micron, presents 25%
and more o~ particles that are smaller than 0 2 micron i e , it has a ratio of R = 3.
This invention lies in utilizing a particle ratio R
that is greater than 3 5 and lies pre~erably between ~ and 10 Very good results are acllieved ~hen }~ -= 5.
The laws that dctcr~ le the pllcnomena of tlle comminu-tion process are such that tlle hirller the percellta~e of particles that are smaller than 1 micron! the more likely the increase in percentage of particles tllat aI'e smaller than 0 2 micron Never-theless, it is possible to control the comminution conditions in such a way that tlle perce~ntage oi` particles under 1 micron in si~e increases very much more rapidly than the percentage of particles under 0 2 micron, as described in our co-pending Canadian patent application Serial No.363,0~7 which is filed con-currently herewith and entitled "PROCESS FOR THE PRODUCTION OF
MINERAL FILLERS BY WET COMMINUTION." The process of this co-pending application is characterized iD that the comminution is carried out without dispersing agents and at a solid substance concentration of less than 60% by weight, in that the comminuted suspension is filtered and the filter cake containin~ about 20%
of water is either dried or, by addition of a dispersing agent, converted into a high-solids suspension with low viscosity.
Examples of products encompassed within this invention comprise natural calcium carbonates with the following properties, all percentage data of the tabulated particle size relating to weight:
% ~ 2 microns %~ 1 micron % ~ 0 2 micron R = % 1 micron % .2-micron 98 75 15 5 0, 98 77 17 ~ 53 98 80 ~5 5,33 The ratio R can also reach very much higher values, for example, values of over 8, as with %~ 2 microns = 98 % c 1 micron - 72 5 % ~ 0,2 micron = 7 The latter composition provides a ratio R of 10 35, Accorcling to this invention, it has been found that the values for an R between ~ and 10, especially in the vicinity of 5 are those that effect the best possible compromise between the efficiency of the product perLormance and economical pro-duction conditions, ~ Irther advantages, features and objects of this invention will become apparent from a reading of the following examples employing fillers made in accordance with this in-vention 1 Paints Alkyd and emulsion paints (acryl-styrene) are prepared according to the paint formulations appearing hereinafter. Such paints contain pigments not readily dissolved in water which are dispersed in a selected medium in the paint Such paints ~lS~9~)8 utilize natural calcium carbonates in the form of chalk and calc-spar having the following granulometric properties of Table I, Table I
_ ._ %~ 2 micron %~ 1 micron % c 0,2 micron R
- Product No, 1 99 90 31 2,9 - Product No, 2 96 75 26 2.88 - Product No, 3 97 70 15 4,67 - Product No, 4 99,5 85 15 5,66 . L
After the application of paint films to a substrate and : complete drying, the gloss or luster is measured with the aid of a photogonimeter, i,e,, an angle-measuring instrument of type GP 2 of the Zeiss firm, The results obtained appear from the follow-ing Table II, Table II
. .
ProductNo, 1 No, 2 No, 3 No, ~
R = 2,9 2,88 ~,67 5,66 ... .. __ .. _ .. __ Emulsion paint - I.uster a.t 60 5,6 22,9 33,9 36,9 - Luster at 70 ~12,4 ~42,3 53,7 56,4 __ . _ Alkyd paint - Luster at 60 (after 1 week) 1,7 21,1 42,7 49,7 - Luster at 60 (after 1 month) 1,2 18.9 37,3 44.7 .. .~ . ~ ~ .. _ ___ ~lSr~C)8 As is evident from Table II, the calcium carbonates used yield increase gloss wi.th an increase in the ratio R.
Emulsion Paint . . .
P~aw Materials Parts by Weight .
Propylene glycol 6 Sodium polyacrylate (40%) 0,5 TiO2-rutile 19 CaCo3 12,5 NH40H (25%) 0.7 10 Acryl-styrene dispersion (50%) 50 Butyl glycol 1.5 Water 3 Methyl cellulose (10%) 2 95,2 Satinized Alkyd Paint Raw ~aterials Parts by Weight Alkyd resin (65%) 240 Soya lecithin 5 TiO2-rutile 200 C Co3 300 Drying agent, e,g,, cobnlt n~plltllenate 10 White spirits 93 8~8
2. Coa.ted Papers Coated papers fol~ offset printing are produced accord-ing to the following formula:
Pigment (see Table III): 100 parts by weight Acryl-styrene copolymerizate (latex): 12 parts by weight Solid substance concentration: 70% by weight This formula of a coating composition was applied in a ratio of 16 g/m to a carrier of 92 g/m , After coating with a draw blade, the papers were dried and calendered under a pressure of 9~
200 kp cm 0 As pigments natural calcium carbonates were com-pared tha.t possessed -the following particle size characteristics set forth in Table III.
Table III
weight % particles smaller than:
2 microns 1 micron 0 2 micron R
- Product No, 1 (chalk) 95 75 24 3.12 - Product No. 2 10(calc-spar) 93 62 17 3 64 ~ Product NoO 3 (calc-spar) 93 77 16 4.81 - Product No. 4 tchalk) 97 75.5 15 5.03 - Product No, 5 (calc-spar) 99 81 13 6 23 The following Table IV shows the gloss or luster obtained with each natural carbonate of Table III.
Table IV
20No. 1 No...... 2 No. 3 No. ~ No. 5 R r= 3,12 R - 3.64 R 4.81 R = 5.03 R ~ 6.23 .... _ Gloss-Average in % 48 52 55 57.5 62.5 _ _ .
As is evident from the Table, the gloss or luster in-creases with the increa.se in the ratio R.
A further important advantage of the products made in accordance with this invention lies in the cost saving in the binder used on the paints and coated papers. Such binders may comprise resins, latex, synthetic emulsions, amidone and casein, In the case of coated paper in which natural calcium carbonates are to be used according to the invention, i e., in , $6~18 which the ratio R is over 3,5, binder economies are effected, There is saved, for example, in comparison to the conventional carbonate compositions, 1,5-2,5 parts of dry binder extract in formulas for offset printing, and 0,5-1,5 parts of dry binder extract in formulas for photogravure. Despite the binder reduc-tions, in each case the adhesive properties of the coatings re-main preserved, Also, in the case of the semi-gloss and gloss paints based on alkyd resins or synthetic binders thinnable in water, and which are made in accordance with this invention, savings are effected which are between about 10 and 20% by weight of dry binder extract, Despite the binder savings there is no reduction in gloss properties in the paint, Additional advantages in the products of this invention comprise desired flow properties in the paper coating compositions and paints, Fillers having R ratios of the prior art result in products subject to increased viscosities, the formation of thi~otropy, thickening during storage, striping in the coating of paper, etc, The products of the present invention, in con-trast, which are distinguished by n ratio R higher than 3,5, do not have these disadvantnges.
It is thus seen that mineral fillers are provided having particles thereoi' in a desired size-weight ratio, Such fillers are particularly adapted for forming high-gloss surfaces as in paper coatings and paints, Products forming such desired surfaces possess the concomitant advantage of reduced binder re-quirements, resulting in cost savings in the manufacture of such products, The additional advantages above noted are also inher-ent in products employing the fillers of this invention, It is believed that the foregoing has made apparent a number of modifications which may be made in the described embodiments without departing from the ambit of the disclosed ~9~
invention. This invention is to be limited, therefore, only by the scope of the appended claims,
Pigment (see Table III): 100 parts by weight Acryl-styrene copolymerizate (latex): 12 parts by weight Solid substance concentration: 70% by weight This formula of a coating composition was applied in a ratio of 16 g/m to a carrier of 92 g/m , After coating with a draw blade, the papers were dried and calendered under a pressure of 9~
200 kp cm 0 As pigments natural calcium carbonates were com-pared tha.t possessed -the following particle size characteristics set forth in Table III.
Table III
weight % particles smaller than:
2 microns 1 micron 0 2 micron R
- Product No, 1 (chalk) 95 75 24 3.12 - Product No. 2 10(calc-spar) 93 62 17 3 64 ~ Product NoO 3 (calc-spar) 93 77 16 4.81 - Product No. 4 tchalk) 97 75.5 15 5.03 - Product No, 5 (calc-spar) 99 81 13 6 23 The following Table IV shows the gloss or luster obtained with each natural carbonate of Table III.
Table IV
20No. 1 No...... 2 No. 3 No. ~ No. 5 R r= 3,12 R - 3.64 R 4.81 R = 5.03 R ~ 6.23 .... _ Gloss-Average in % 48 52 55 57.5 62.5 _ _ .
As is evident from the Table, the gloss or luster in-creases with the increa.se in the ratio R.
A further important advantage of the products made in accordance with this invention lies in the cost saving in the binder used on the paints and coated papers. Such binders may comprise resins, latex, synthetic emulsions, amidone and casein, In the case of coated paper in which natural calcium carbonates are to be used according to the invention, i e., in , $6~18 which the ratio R is over 3,5, binder economies are effected, There is saved, for example, in comparison to the conventional carbonate compositions, 1,5-2,5 parts of dry binder extract in formulas for offset printing, and 0,5-1,5 parts of dry binder extract in formulas for photogravure. Despite the binder reduc-tions, in each case the adhesive properties of the coatings re-main preserved, Also, in the case of the semi-gloss and gloss paints based on alkyd resins or synthetic binders thinnable in water, and which are made in accordance with this invention, savings are effected which are between about 10 and 20% by weight of dry binder extract, Despite the binder savings there is no reduction in gloss properties in the paint, Additional advantages in the products of this invention comprise desired flow properties in the paper coating compositions and paints, Fillers having R ratios of the prior art result in products subject to increased viscosities, the formation of thi~otropy, thickening during storage, striping in the coating of paper, etc, The products of the present invention, in con-trast, which are distinguished by n ratio R higher than 3,5, do not have these disadvantnges.
It is thus seen that mineral fillers are provided having particles thereoi' in a desired size-weight ratio, Such fillers are particularly adapted for forming high-gloss surfaces as in paper coatings and paints, Products forming such desired surfaces possess the concomitant advantage of reduced binder re-quirements, resulting in cost savings in the manufacture of such products, The additional advantages above noted are also inher-ent in products employing the fillers of this invention, It is believed that the foregoing has made apparent a number of modifications which may be made in the described embodiments without departing from the ambit of the disclosed ~9~
invention. This invention is to be limited, therefore, only by the scope of the appended claims,
Claims (11)
1. A mineral filler having particles which effect a ratio:
% by weight of a size less than 1 micron % by weight of a size less than .2 micron of greater than 3.5.
% by weight of a size less than 1 micron % by weight of a size less than .2 micron of greater than 3.5.
2. In a high-gloss coating composition the improvement comprising the utilization of a mineral filler having particles which effect a ratio % by weight of a size less than 1 micron % by weight of a size less than .2 micron of greater than 3.5.
3. The mineral filler of claim 1 in which said mineral filler comprises a natural calcium carbonate.
4. The mineral filler of claim 1 in which said ratio is between 4 and 10.
5. The mineral filler according to claim 1 in which said ratio is 5.
6. The coating composition of claim 2 in which said mineral filler comprises a natrual calcium carbonate.
7. The coating composition of claim 2 in which said ratio is between 4 and 10.
8. The coating composition of claim 2 in which said ratio is 5.
9. The coating composition of claim 2 in which said composition comprises a paint.
10. The coating composition of claim 2 in which said composition comprises a paper-coating composition.
11. The coating composition of claim 10 in which said coating composition contains about 70% by weight of said filler.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2943652.0 | 1979-10-29 | ||
| DE2943652A DE2943652C2 (en) | 1979-10-29 | 1979-10-29 | Mineral filler in the form of natural calcium carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1150908A true CA1150908A (en) | 1983-08-02 |
Family
ID=6084644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000363068A Expired CA1150908A (en) | 1979-10-29 | 1980-10-23 | Mineral filler |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0027997B2 (en) |
| JP (1) | JPS5674163A (en) |
| AT (1) | ATE36001T1 (en) |
| CA (1) | CA1150908A (en) |
| DE (2) | DE2943652C2 (en) |
| FI (1) | FI803275L (en) |
| NO (1) | NO161073C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482514A (en) * | 1992-09-14 | 1996-01-09 | Ciba-Geigy Corporation | Process for enhancing the whiteness, brightness and chormaticity of paper making fibres |
| US5846382A (en) * | 1992-09-14 | 1998-12-08 | Jorax Gmbh | Process for enhancing the whiteness, brightness and chromaticity of fillers and pigments |
| EP2465903A1 (en) | 2010-12-16 | 2012-06-20 | Omya Development AG | Mineral composition, especially for use in paper fillers and paper or plastic coatings |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3617169C2 (en) * | 1986-05-22 | 1996-05-23 | Pluss Stauffer Ag | Carbonate-containing mineral fillers and pigments |
| SE468531C (en) * | 1991-06-05 | 1995-06-12 | Mo Och Domsjoe Ab | Copy paper in sheet form |
| DE4128570A1 (en) * | 1991-08-28 | 1993-03-04 | Pluss Stauffer Ag | CARBONATE-CONTAINING MINERAL FUELS AND PIGMENTS |
| DE4230742C2 (en) * | 1992-09-14 | 1994-11-24 | Pluss Stauffer Ag | Process and apparatus for the preparation of filler and / or pigment suspensions, in particular for the paper industry, and pigments for the paper industry |
| US5533678A (en) * | 1993-01-19 | 1996-07-09 | Pluess-Staufer Ag | Method for the production of carbonates by wet grinding |
| DE19601245A1 (en) * | 1996-01-16 | 1997-07-17 | Haindl Papier Gmbh | Roller printing paper with coldset suitability and method for its production |
| AU701519B2 (en) * | 1996-03-13 | 1999-01-28 | Omya Development Ag | A coating color including carbonate containing pigments |
| US6713414B1 (en) | 2000-05-04 | 2004-03-30 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6423804B1 (en) | 1998-12-31 | 2002-07-23 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive hard water dispersible polymers and applications therefor |
| US6444214B1 (en) | 2000-05-04 | 2002-09-03 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6429261B1 (en) | 2000-05-04 | 2002-08-06 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6815502B1 (en) | 2000-05-04 | 2004-11-09 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersable polymers, a method of making same and items using same |
| US6683143B1 (en) | 2000-05-04 | 2004-01-27 | Kimberly Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6599848B1 (en) | 2000-05-04 | 2003-07-29 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6586529B2 (en) * | 2001-02-01 | 2003-07-01 | Kimberly-Clark Worldwide, Inc. | Water-dispersible polymers, a method of making same and items using same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB504714A (en) * | 1936-11-04 | 1939-04-28 | Du Pont | Method of forming delustered shaped articles |
| DE1504522B2 (en) * | 1959-03-19 | 1972-01-05 | Minnesota Mining And Manufacturing Co., St. Paul, Minn. (V.St.A.) | PROCESS FOR MANUFACTURING A POLYMERIC MATERIAL WITH A MATTED SURFACE |
| DE1169123B (en) * | 1961-12-08 | 1964-04-30 | Basf Ag | Thermoplastic molding compounds containing polystyrene |
| GB1313749A (en) * | 1969-10-02 | 1973-04-18 | Canadian Patents Dev | Polymeric high performance composites |
| US3876608A (en) * | 1972-05-26 | 1975-04-08 | Du Pont | Thermoplastic films containing spherical inorganic particles of 2 to 10 micron size |
| DE2808425A1 (en) * | 1978-02-27 | 1979-08-30 | Pluss Stauffer Ag | MINERAL FILLER |
-
1979
- 1979-10-29 DE DE2943652A patent/DE2943652C2/en not_active Expired
-
1980
- 1980-10-15 NO NO803078A patent/NO161073C/en unknown
- 1980-10-17 FI FI803275A patent/FI803275L/en not_active Application Discontinuation
- 1980-10-21 EP EP80106420A patent/EP0027997B2/en not_active Expired - Lifetime
- 1980-10-21 AT AT80106420T patent/ATE36001T1/en not_active IP Right Cessation
- 1980-10-21 DE DE8080106420T patent/DE3072107D1/en not_active Expired
- 1980-10-23 CA CA000363068A patent/CA1150908A/en not_active Expired
- 1980-10-29 JP JP15199080A patent/JPS5674163A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482514A (en) * | 1992-09-14 | 1996-01-09 | Ciba-Geigy Corporation | Process for enhancing the whiteness, brightness and chormaticity of paper making fibres |
| US5846382A (en) * | 1992-09-14 | 1998-12-08 | Jorax Gmbh | Process for enhancing the whiteness, brightness and chromaticity of fillers and pigments |
| EP2465903A1 (en) | 2010-12-16 | 2012-06-20 | Omya Development AG | Mineral composition, especially for use in paper fillers and paper or plastic coatings |
| WO2012080343A1 (en) | 2010-12-16 | 2012-06-21 | Omya Development Ag | Mineral composition, especially for use in paper fillers and paper or plastic coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE36001T1 (en) | 1988-08-15 |
| DE2943652C2 (en) | 1985-12-12 |
| EP0027997B1 (en) | 1988-07-27 |
| DE3072107D1 (en) | 1988-09-01 |
| EP0027997B2 (en) | 1995-04-12 |
| NO161073C (en) | 1989-06-28 |
| FI803275L (en) | 1981-04-30 |
| JPS5674163A (en) | 1981-06-19 |
| DE2943652A1 (en) | 1981-04-30 |
| NO803078L (en) | 1981-04-30 |
| NO161073B (en) | 1989-03-20 |
| JPS6360074B2 (en) | 1988-11-22 |
| EP0027997A1 (en) | 1981-05-06 |
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