DE2153129B2 - Hexagonal plate-like white pigment and method of making the same - Google Patents

Hexagonal plate-like white pigment and method of making the same

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Publication number
DE2153129B2
DE2153129B2 DE19712153129 DE2153129A DE2153129B2 DE 2153129 B2 DE2153129 B2 DE 2153129B2 DE 19712153129 DE19712153129 DE 19712153129 DE 2153129 A DE2153129 A DE 2153129A DE 2153129 B2 DE2153129 B2 DE 2153129B2
Authority
DE
Germany
Prior art keywords
pigment
hexagonal
plate
white pigment
cao
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19712153129
Other languages
German (de)
Other versions
DE2153129A1 (en
DE2153129C3 (en
Inventor
Keiichi Kamakura Kanagawa Murakami
Hirobumi Sendai Miyagi Tanaka
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.)
KOKUSAKU PULP INDUSTRY Co LTD TOKIO
Original Assignee
KOKUSAKU PULP INDUSTRY Co LTD TOKIO
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 KOKUSAKU PULP INDUSTRY Co LTD TOKIO filed Critical KOKUSAKU PULP INDUSTRY Co LTD TOKIO
Priority to DE19712153129 priority Critical patent/DE2153129C3/en
Priority to FR7142101A priority patent/FR2161409A5/en
Publication of DE2153129A1 publication Critical patent/DE2153129A1/en
Publication of DE2153129B2 publication Critical patent/DE2153129B2/en
Application granted granted Critical
Publication of DE2153129C3 publication Critical patent/DE2153129C3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • C09C1/402—Satin white, modifications thereof, e.g. carbonated or silicated; Calcium sulfoaluminates; Mixtures thereof, e.g. with calcium carbonate or kaolin
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Paper (AREA)

Description

3 CaO AI2OjCa(X)nW-H2O,3 CaO AI 2 OjCa (X) n WH 2 O,

in der X ein einwertiges oder zweiwertiges Anion, beispielsweise SO4-, SOj-, COj-, CrO4-, MnO4--, Cl-, Br-, NOr, NO2-, OH-, HCOr, oder CHj-COO-, bedeutet, π die ganze Zahl I ist, wenn X ein zweiwertiges Anion ist, und η die ganze Zahl von 2 ist, wenn X ein einwertiges Anion ist, und wobei weine der ganzen Zahlen 10,12 oder 13 ist. Der Pigmentkristall hat Beugungswinkel (2Θ), die mit Röntgenstrahlen (Cu · Κλ), bei 9,95 (sehr stark), 19,90 (sehr stark) und 22,5 (stark) bestimmt wurden.in which X is a monovalent or divalent anion, for example SO 4 -, SOj-, COj-, CrO 4 -, MnO 4 -, Cl-, Br-, NOr, NO 2 -, OH-, HCOr, or CHj-COO -, means π is the integer I when X is a divalent anion, and η is the integer of 2 when X is a monovalent anion, and w one of the integers 10, 12 or 13. The pigment crystal has diffraction angles (2Θ) which were determined with X-rays (Cu · Κλ) at 9.95 (very strong), 19.90 (very strong) and 22.5 (strong).

Das Pigment wird dadurch hergestellt, daß (a) Calciumoxid oder Calciumhydroxid, (b) Aluminiumoxid· gel und (c) wenigstens ein wasserlösliches Calciumsal/ oder Aluminiumsalz in einer wäßrigen Suspension zur Reaktion gebracht werden. Falls erforderlich, kann das Reaktionssystem durchgemischt oder erhitzt werden. Die Durchmischung wird vorzugsweise durch F.inleitcn von Luft, die frei ist von Kohlendioxid. Sauerstoff oder Stickstoff, durchgeführt.The pigment is produced in that (a) calcium oxide or calcium hydroxide, (b) aluminum oxide gel and (c) at least one water-soluble calcium salt / or aluminum salt can be reacted in an aqueous suspension. If necessary, it can Reaction system are mixed or heated. Mixing is preferably carried out by initiating of air that is free of carbon dioxide. Oxygen or Nitrogen.

CaO -AIiO3-GeI-CaQ2-H2OCaO-AliO 3 -GeI-CaQ 2 -H 2 O CaO-Al2O3-GeI-Ca(NOj)2-HaOCaO-Al 2 O 3 -GeI-Ca (NOj) 2 -HaO CaO-Al2O3-GeI-CaSO4 · 2 H2O-H2OCaO-Al 2 O 3 -Gel-CaSO 4 · 2 H 2 OH 2 O CaO-Al2O3-GeI-AlCI3-H2OCaO-Al 2 O 3 -Gel-AlCl 3 -H 2 O CaO-AI2O3-GeI-CaCrO4-H2OCaO-Al 2 O 3 -GeI-CaCrO 4 -H 2 O CaO-AI2O3-GeI-Al(NOa)3-H2OCaO-Al 2 O 3 -GeI-Al (NOa) 3 -H 2 O CaO-Al2O3-GeI-CaBr2-H2OCaO-Al 2 O 3 -GeI-CaBr 2 -H 2 O

Im allgemeinen werden Reaktionstemperaturen bis zu ungefähr 120°C eingestellt Je höher die Reaktionstemperatur ist, desto höher ist auch die Reaktionsgeschwindigkeit und desto größer werden u'e dabei gebildeten Kristalle. Wird jedoch das CaO-Al2O3-Gel —H2O-System verwendet, so entsteht das gewünschte Produkt mit hexagonalen. plattenartigen Kristallen in einem niedrigeren Temperaturbereich und es besteht bei Temperaturanstieg eine Tendenz zur Umwandlung in ein kubhches Hexahydrat 3 CaO · AI2O3 · 6 H2O. Im Anfangsstadium der Reaktion wird bei den SystemenIn general, reaction temperatures of up to about 120 ° C. are set. The higher the reaction temperature, the higher the rate of reaction and the larger the number of crystals formed in the process. If, however, the CaO-Al 2 O 3 -gel —H 2 O system is used, the desired product with hexagonal is formed. plate-like crystals in a lower temperature range and, as the temperature rises, there is a tendency to convert into a cubic hexahydrate 3 CaO · Al 2 O 3 · 6H 2 O. In the initial stage of the reaction, the systems

CaO-AI2O3-GeI-CaSO4 · 2 H2O-H2O oder
CaO-Al2O3-GeI-Alj(SO4)3-H2OCaO-Al 2 O 3 -GeI-CaSO 4 · 2 H 2 OH 2 O or
CaO-Al 2 O 3 -GeI-Alj (SO 4 ) 3 -H 2 O

Satinweiß gebildet, das in das gewünschte hexagonale. plattenartige Produkt umgewandelt wird.Satin white made into the desired hexagonal. plate-like product is converted.

Es wird bevorzugt, daß die Verhältnisse der Zusätze im wäßrigen Reaktionssystem der Produktzusammensetzung entsprechen. Das Produkt hat eine Teilchengröße von ungefähr 1 bis 20 μηι. Es ist kein Wechsel in der Form des Produkts zu beobachten, wenn es erhitzt oder einer Kohlendioxid imosphäre unter 1 bar und bei 40 bis 60% relativer Feuchtigkeit ausgesetzt wird. Wird das Produkt einer Kohlendioxidatmosphäre unter I bar und bei 100% relativer Feuchtigkeit ausgesetzt, so ist ein bemerkenswerter Wechsel in der Gestalt beobachtbar, der von der Bildung von CaCO3 herrührt. Das erfindungsgemäß hergestellte Produkt ist deshalb unter Normalbedingungen chemisch und thermisch stabil. Es ist deshalb als Pigment für die Papierherstellung geeignet.It is preferred that the proportions of the additives in the aqueous reaction system correspond to the product composition. The product has a particle size of approximately 1 to 20 μm. No change in the shape of the product is observed when it is heated or exposed to a carbon dioxide atmosphere below 1 bar and at 40 to 60% relative humidity. When the product is exposed to a carbon dioxide atmosphere below 1 bar and at 100% relative humidity, a remarkable change in shape can be observed, which results from the formation of CaCO 3 . The product produced according to the invention is therefore chemically and thermally stable under normal conditions. It is therefore suitable as a pigment for paper production.

Beispiel IExample I.

In ein Reaktionsgefäß mit Rührer wurden 1380 Gewichtsteile Wasser gegeben und auf 70°C erhitzt. Danach wurden ungefähr 100 Teile Calciumoxid unter Rühren und unter Bildung von Kalkmilch zugesetzt. Danach wurden ungefähr 330 Teile Aluminiumoxidgel (Wassergehall 90%) und 100 Teile Aluminiumsulfat (AI2(SO4)J · 17 H.'O) zugsgeben. Die Tempera'ur des Systems wurde erhöht und 10 Stunden lang auf 80 bis IOO°C gehalten, während die Reaktion zum Abschluß gebracht wurde.1380 parts by weight of water were placed in a reaction vessel with a stirrer and the mixture was heated to 70.degree. About 100 parts of calcium oxide were then added with stirring to form milk of lime. About 330 parts of aluminum oxide gel (water content 90%) and 100 parts of aluminum sulfate (Al 2 (SO 4 ) J.17 H.'O) were then added. The temperature of the system was raised and held at 80 to 100 ° C. for 10 hours while the reaction was brought to completion.

Das erhaltene Produkt bestand aus weißen, hexagonalen, plattenartigen Kmtailen der chemischen Formel 3CaO · AIjOiCaSO4 · 12 HjO. Die Teilchengröße reichte von I bis 5 μιτι.The product obtained consisted of white, hexagonal, plate-like components of the chemical formula 3CaO · AljOiCaSO 4 · 12 HjO. The particle size ranged from 1 to 5 μm.

Beispiele 2 br·. 7Examples 2 br ·. 7th

In der Tabelle sind die Rcaktionsteilnchmer. die nach den Verfahren des Beispiels I umgesetzt wurde,., und die Produkte aufgeführt.The participants are in the table. the after the procedure of Example I was implemented,., and the products listed.

TabelleTabel Beispielexample

H2O (Teile)H 2 O (parts)

CaOCaO

(Teile)(Parts)

AI2O3-GeI (Teile)AI 2 O 3 gel (parts)

AI- oder Ce-SaIz (Teile)AI- or Ce-SaIz (parts)

Produktproduct

1079 1213 1344 1310 1472 13681079 1213 1344 1310 1472 1368

110110 664664 CaCl22H2OCaCl 2 2H 2 O 95,695.6 8282 498498 Ca(NO3MH2OCa (NO 3 MH 2 O 11,511.5 8181 492492 CaSO42H2OCaSO 4 2H 2 O 8383 7878 471471 CaBr2OHjOCaBr 2 OHjO 142142 120120 360360 AlCl3 AlCl 3 4848 7979 480480 CaCrO42H,OCaCrO 4 2H, O 7373

3CaOAl2O3CaCl2 10H2O 3 CaOAI2O3Ca(NOj)2IO H2O 3CaO Al2O3 CaSO4IOH2O 3CaOAl2OjCaBr2IOH2O 3CaOAl3O3CaCl2IOH2O 3CaO Al2O3 CaCrO4WHjO 3CaOAl 2 O 3 CaCl 2 10H 2 O 3 CaOAI 2 O 3 Ca (NOj) 2 IO H 2 O 3CaO Al 2 O 3 CaSO 4 IOH 2 O 3CaOAl 2 OjCaBr 2 IOH 2 O 3CaOAl 3 O 3 CaCl 2 IOH 2 O 3CaO Al 2 O 3 CaCrO 4 WHjO

Claims (2)

Patentansprüche:Patent claims: 1. Hexagonales, plattenartiges, weißes Pigment mit der chemischen Formel1. Hexagonal, platelike, white pigment with the chemical formula 3 CaO Al2O3 CaPC)nW H2O1 3 CaO Al 2 O 3 CaPC) n WH 2 O 1 kl der X ein einwertiges Anion und π die ganze Zahl 2 oder X ein zweiwertiges Anion und η die ganze Zahl 1 und wdie ganze Zahl 10,12 oder 13 darstellt, dessen Kristall mit Röntgenstrahlen (Cu · Kac) bestimmte Beugungswinkel (2Θ) von 9,95°, 19,90° und 224° aufweistkl where X is a monovalent anion and π is the integer 2 or X is a divalent anion and η is the integer 1 and w is the integer 10, 12 or 13, the crystal of which is X-ray (Cu Kac) diffraction angles (2Θ) of 9 , 95 °, 19.90 ° and 224 ° 2. Verfahren zur Herstellung des Pigments des Anspruchs 1, dadurch gekennzeichnet, daß (a) Calciumoxid oder Calciumhydroxid, (b) Aluminiumoxidgel und (c) wenigstens ein wasserlösliches Aluminiumsalz oder Calciumsalz in wäßriger Suspension, gegebenenfalls unter Durchmischen oder Erhitzen, bei Temperaturen bis zu 1200C zur Umsetzung gebracht werden.2. Process for the preparation of the pigment of claim 1, characterized in that (a) calcium oxide or calcium hydroxide, (b) aluminum oxide gel and (c) at least one water-soluble aluminum salt or calcium salt in aqueous suspension, optionally with mixing or heating, at temperatures up to 120 0 C are brought to implementation. Die Reaktion zur Herstellung des Pigments wird beispielsweise mit folgenden Systemen durchgeführt:The reaction to produce the pigment is carried out, for example, with the following systems: CaO-Al2O3-GeI-H2OCaO-Al 2 O 3 -Gel-H 2 O Die Erfindung betrifft ein hexagonales, plattenartiges, weißes Pigment und ein Verfahren zur Herstellung desselben.The invention relates to a hexagonal, plate-like, white pigment and a method for its production same. Kaolinit, der in hexagonaler, plattenartiger Kristallform auftritt, verleiht Papier hohen Glanz und gute Uedruckbarkeit. Er wird deshalb bei der Papierherstellung in großem Ausmaß verwendet. Satinweiß ist für diesen Zweck ebenfalls verwendet worden, liegt jedoch in Torrn von Nadeln vor und ist deshalb bezüglich verschiedener Eigenschaften dem Kaolinit unterlegen.Kaolinite, which has a hexagonal, plate-like crystal form occurs, gives paper a high gloss and good printability. It is therefore used in papermaking widely used. Satin white has also been used for this purpose, but lies in torrn of needles and is therefore inferior to kaolinite in terms of various properties. Aufgabe der Erfindung ist es demgemäß, ein weiteres, für die Papierherstellung geeignetes, weißes Pigment, jedoch mit plattenartiger Kristallform, sowie ein Verfahren zur Herstellung desselben vorzusehen. Die erfindungsgemäße Lösung der Aufgabe ergibt sich aus den Ansprüchen.The object of the invention is accordingly to provide a further white pigment suitable for papermaking, but with a plate-like crystal shape, as well as a Provide method for making the same. The inventive solution to the problem results from the demands. Es ist somit gelungen, ein neuartiges, weißes Pigment herzustellen, dessen chemische Struktur derjenigen des Satinweiß ähnlich ist, das jedoch wie Graphit eine hexagonale, plattenartige Kristallform hat.It has thus been possible to produce a new type of white pigment whose chemical structure is that of Satin white is similar, but like graphite, it has a hexagonal, plate-like crystal shape. Das erfindungsgemäße Pigment hat die chemische Formel:The pigment according to the invention has the chemical formula:
DE19712153129 1971-10-25 1971-10-25 Hexagonal plate-like white pigment and method of making the same Expired - Lifetime DE2153129C3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19712153129 DE2153129C3 (en) 1971-10-25 1971-10-25 Hexagonal plate-like white pigment and method of making the same
FR7142101A FR2161409A5 (en) 1971-10-25 1971-11-24 White satin pigment - contg calcium oxide, alumina and an aluminium/calcium salt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712153129 DE2153129C3 (en) 1971-10-25 1971-10-25 Hexagonal plate-like white pigment and method of making the same

Publications (3)

Publication Number Publication Date
DE2153129A1 DE2153129A1 (en) 1973-05-03
DE2153129B2 true DE2153129B2 (en) 1980-07-10
DE2153129C3 DE2153129C3 (en) 1981-11-05

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Country Status (2)

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DE (1) DE2153129C3 (en)
FR (1) FR2161409A5 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470820A1 (en) * 1979-11-30 1981-06-12 Lafarge Sa PROCESS FOR PRODUCING MINERAL FILLERS CONTAINING HYDRATED CALCIUM MONOCARBOALUMINATE
DE3225897A1 (en) * 1982-07-10 1984-01-12 Degussa Ag, 6000 Frankfurt INORGANIC PIGMENTS AND METHOD FOR THE PRODUCTION THEREOF
DE102006055214A1 (en) 2006-11-21 2008-05-29 Nabaltec Gmbh Calcium carbonate hydroxodialuminates having hexagonal-plate crystal habit

Also Published As

Publication number Publication date
FR2161409A5 (en) 1973-07-06
DE2153129A1 (en) 1973-05-03
DE2153129C3 (en) 1981-11-05

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