FI70805B - FOERFARANDE FOER DISPERGERING AV TALK - Google Patents
FOERFARANDE FOER DISPERGERING AV TALK Download PDFInfo
- Publication number
- FI70805B FI70805B FI841298A FI841298A FI70805B FI 70805 B FI70805 B FI 70805B FI 841298 A FI841298 A FI 841298A FI 841298 A FI841298 A FI 841298A FI 70805 B FI70805 B FI 70805B
- Authority
- FI
- Finland
- Prior art keywords
- talc
- slurry
- process according
- weight
- granulated
- Prior art date
Links
- 239000000454 talc Substances 0.000 claims description 46
- 229910052623 talc Inorganic materials 0.000 claims description 46
- 239000002002 slurry Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 12
- 239000011707 mineral Substances 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000005995 Aluminium silicate Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 235000012211 aluminium silicate Nutrition 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000010440 gypsum Substances 0.000 claims description 5
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- -1 for example Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- 239000000049 pigment Substances 0.000 description 6
- 229920002266 Pluriol® Polymers 0.000 description 4
- 239000000546 pharmaceutical excipient Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
-
- 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
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Description
Menetelmä talkin dispergoimiseksi Förfarande för dispergering av taik 70805Method for dispersing talc Förfarande för dispersing av taik 70805
Keksinnön kohteena on menetelmä talkin dispergoimiseksi. Erityisesti keksinnön kohteena on menetelmä, jolla rakeistettu hienojakoinen talkki voidaan dispergoida edullisesti paperin päällystyspastan vaatimukset täyttäväksi lietteeksi säilyttäen rakeistetun talkin käsiteltävyysedut ja jos-5 sa voidaan käyttää standardlllettimiä.The invention relates to a method for dispersing talc. In particular, the invention relates to a process by which granulated fine talc can be dispersed, preferably in a slurry meeting the requirements of a paper coating paste, while maintaining the processability of granulated talc and if standard fillers can be used.
Hienoksi jauhetun talkin rakeistus on yleisesti käytetty menetelmä massa-maisen talkkituotteen kasiteltävyyden parantamiseksi. Rakeistuksessa kos-tuettu talkki puristetaan suurehkolla voimalla pieniksi pölyämättömiksi 10 briketeiksi. Kuitenkin liian lähelle toisiaan puristetut ja sopivissa asennoissa toisiinsa nähden olevat talkkihiukkaset liittyvät toisiinsa van der Waals-voiman avulla kuten alkuperäisessä talkkikiteessä. Energia-kynnys talkilla on 4,1 kcal/mol (17,2 kJ/mol) ja kriittinen etäisyys 3 A (R.F.GIESE, JR: Interlayer bonding in Talc and Pyrophyllite, 1974). Kon-15 ventionaalisessa rakeistuksessa ja varastosilloissa ylittyvät nämä arvot usein ja seurauksena on, että rakelstuksen jälkeen lietetyn talkin hiuk-kaskokojakauma on karkeampi kuin ennen rakeistusta.Granulation of finely ground talc is a commonly used method to improve the processability of a bulk talc product. In granulation, the moistened talc is compressed with a relatively large force into small dust-free briquettes. However, talc particles compressed too close to each other and in suitable positions relative to each other are joined together by van der Waals force as in the original talc crystal. The energy threshold for talc is 4.1 kcal / mol (17.2 kJ / mol) and the critical distance is 3 A (R.F. GIESE, JR: Interlayer bonding in Talc and Pyrophyllite, 1974). In conventional granulation and storage bridges, these values are often exceeded and, as a result, the particle size distribution of the talc slurried after granulation is coarser than before granulation.
Paperin päällystyspastassa pigmentin on oltava täysin dispergoituneena.The pigment in the paper coating paste must be completely dispersed.
20 Tämän onnistuminen edellyttää yhteen liittyneiden hiukkasten irrottamista toisistaan. Rakeistetun hienojakoisen talkin lietossa joudutaankin käyttämään erityisen tehokkaita dlspergaattoreita. Energian tarve päällystystäkin lietossa on kaksi kertaa niin suuri kuin päällystyskaolii-nin lietossa (J-E. TEIRFOLK, INSKO 82-80 VI).20 For this to be successful, the associated particles must be separated. In the slurry of granulated fine talc, particularly effective dispersers have to be used. The energy requirement in the coating slurry is twice as high as in the coating kaolin slurry (J-E. TEIRFOLK, INSKO 82-80 VI).
2525
Paperin päällystyspastaan käytettävän lietteen viskositeetin ja reologis-ten ominaisuuksien tulee olla stabiilit. Aglomeroltumista ja sedimentoitumista el saa tapahtua pitemplaikaisessakaan varastoinnissa.The viscosity and rheological properties of the slurry used in the paper coating paste must be stable. Agglomeration and sedimentation can occur even during prolonged storage.
30 Keksinnön päämääränä on aikaansaada menetelmä, jossa voidaan välttää kalliiden ja tehokkaiden erikoissekoittimien käyttö.It is an object of the invention to provide a method in which the use of expensive and efficient special mixers can be avoided.
7080570805
Keksinnön päämäärä saavutetaan menetelmällä, jolle on pääasiallisesti tunnusomaista se, että talkki lietetään ainakin yhden hydrofiilisen raine-raaliaineen läsnäollessa.The object of the invention is achieved by a process which is mainly characterized in that the talc is slurried in the presence of at least one hydrophilic Raine raw material.
5 Keksinnön mukaisen menetelmän muut tunnusmerkit on esitetty patenttivaatimuksissa 2-9.Other features of the method according to the invention are set out in claims 2-9.
Keksinnön mukaisessa menetelmässä talkki voi olla joko hienojakoista pulverimaista talkkia tai rakeistettua talkkia. Rakeistetun hienojakoisen 10 talkin alkuperäinen raekoko on keskimäärin 1-5 fim. Rakeistusveteen on lisätty 0,5-1,5 p-% talkin kuivapainosta esim. pH:ta sääteleviä hydrofi-lisoivia ja vaahdon muodostusta estäviä apuaineita, kuten esim. NaOH, polyalkyleenlglykolia ja/tal sen johdannaisia sekä tarkoitukseen sopivia tensidejä. Hydroflilisestä mlneraallaineesta tai -aineista tai niiden 15 seoksista tehtyyn vesilietteeseen lisätään edellä mainittuja apuaineita 0,1-0,5 p-% pigmenttien kokonaismäärästä. Apuaineiden tehon säilyttämiseksi lämpötila lietossa ei saa ylittää lämpötilaa 50°C.In the process according to the invention, the talc can be either finely divided powdered talc or granulated talc. The initial grain size of the granulated fine 10 talc is on average 1-5 microns. 0.5-1.5% by weight, based on the dry weight of talc, of pH-adjusting hydrophilizing and anti-foaming agents, such as NaOH, polyalkylene glycol and / or its derivatives and suitable surfactants, have been added to the granulation water. To the aqueous slurry of the hydrophilic mineral substance or substances or mixtures thereof are added the above-mentioned excipients in an amount of 0.1 to 0.5% by weight of the total amount of pigments. To maintain the effectiveness of the excipients, the temperature in the slurry must not exceed 50 ° C.
Mineraalin hydrofiillsyys johtuu tämän mineraalin pintaenerglan ja veden 20 pintaenerglan välisestä erosta; mitä pienempi ero on, sitä hydrofiilisem-pi on mineraali.The hydrophilicity of a mineral is due to the difference between the surface energy of this mineral and the surface energy of water; the smaller the difference, the more hydrophilic pi is the mineral.
22
Normaalin veden pintaenergla on 72 mJ/m Kaoliinin " 65 " 25 Kalsiumkarbonaatin " 70 "The surface energy of normal water is 72 mJ / m Kaolin "65" 25 Calcium carbonate "70"
Kipsin " n. 70 "Gypsum "about 70"
Talkin " 45 "Talkin "45"
Mineraalien pintaenergiolden erot johtuvat erilaisista kiderakenteista 30 ja kemiallisesta koostumuksesta. Talkki on luonnostaan voimakkaasti hydrofobinen. Muut mainitut mineraalit kostuvat helposti. Ilman apuaineita valmistettu talkki-vesi-liete on tiksotrooppinen, mutta muuttuu myöhemmin diletantiksi sitä mukaa kun ilma poistuu lietteestä. Viskositeetin stabiilisuus on huono ja reologlset ominaisuudet muuttuvat talkin hitaan 35 kostumlsen myötä. Ilman lisäaineita valmistetun yli 60 % kuiva-ainetta sisältävän lietteen viskositeetti on käyttöä ajatellen aivan liian korkea.Differences in the surface energy of minerals are due to different crystal structures 30 and chemical composition. Talc is inherently highly hydrophobic. The other minerals mentioned get wet easily. The talc-water slurry prepared without excipients is thixotropic, but later becomes a dilettant as air escapes from the slurry. The viscosity stability is poor and the rheological properties change with the slow wetting of the talc. The viscosity of a slurry prepared without additives with a dry matter content of more than 60% is far too high for use.
li 3 70805li 3 70805
Hydrofiilisenä oineraaliaineena, jota lietteessä tulee olla 10-60 % lopullisen lietteen painosta, voidaan käyttää esim. paperin päällystykseen sopivaa kaoliinia, kalslumkarbonaattia tai kipsiä. Hineraaliaineen vaikutus hienojakoisen rakeistetun talkin dispergoinnissa perustuu: 5 - hier«vaikutukseen, jolla lietteessä olevat partikkelit hajoittavat talkkiaglomeraatit - erilaiseen pintaenergiaan: asettumalla talkkihiukkasten väleihin ne vähentävät pigmentin hydrofobisuutta ja estävät talkkihiukkasten uu- 10 delleen aglomeroitumisen paineen vaikutuksesta Tällä tavalla valmistettuun lietteeseen saadaan alkuperäinen hiukkaskoko-jakautuma ja korkea kuiva-ainepitoisuus 60-70 Z, edullisesti 65-68 %. Pigmentit saadaan täysin kostutetuiksi ja lietteen käsittelyominaisuudet 15 ovat hyvät. Käytetyt apuaineet sopivat päällystyspastan valmistukseen ja liete on stabiili myös pitempiaikaisessa varastoinnissa. Menetelmän mukainen dispergolnti voidaan suorittaa standardlliettimissä ja talkin rakeis-tamisen tuomat käsiteltävyysedut voidaan säilyttää.As the hydrophilic mineral substance, which must be 10-60% by weight of the final slurry, e.g., kaolin, calcine carbonate or gypsum suitable for paper coating can be used. The effect of the minerals in dispersing the finely divided granulated talc is based on: and a high dry matter content of 60-70 Z, preferably 65-68%. The pigments are completely wetted and the sludge handling properties are good. The excipients used are suitable for the preparation of the coating paste and the slurry is stable even in longer-term storage. The dispersion according to the method can be carried out in standard slurries and the processability benefits of granulating talc can be maintained.
20 Esimerkki 120 Example 1
Hienojakoista rakeistettua talkkia, jonka keskimääräinen raekoko oli 2,2 pm ja jonka rakeistusveteen lisättiin polyalkyleeniglykolia (Pluriol®PE 6400) 0,8 % talkin kuivapainosta, dispergoitiin SPS-kaolii-25 nista tehtyyn lietteeseen, jonka lieteveteen oli lisätty 0,3 paino-osaa dispergointiainetta (Polysalz^S), 0,02 paino-osaa natriumhydroksidia ja 0,02 paino- osaa vaahdonestoainetta (Nopco^ 8034) (kaikki pigmenttien kokonaispainosta). Lietteen lopullinen kuiva-ainepitoisuus oli 65 Z ja siitä oli 50 Z talkkia ja 50 Z kaoliinia. Lletto tapahtui Kady 30 Mill-laitteella. Laimennettuna 63 p-Z:iin lietteen viskositeetti oli 100 mPas/50 r/min. Viskositeetti ja Teologiset ominaisuudet eivät muuttuneet vuorokauden kestäneessä varastoinnissa. Liete käytettiin hyvällä tuloksella LWC-paperin päällystykseen.Fine granulated talc having an average grain size of 2.2 μm, to which polyalkylene glycol (Pluriol®PE 6400) 0.8% by dry weight of talc was added to the granulation water, was dispersed in a slurry of SPS kaolin-25 to which 0.3 parts by weight had been added to the sludge water. dispersant (Polysalz® S), 0.02 parts by weight of sodium hydroxide and 0.02 parts by weight of antifoam (Nopco® 8034) (all based on the total weight of the pigments). The final dry matter content of the slurry was 65 Z and was 50 Z of talc and 50 Z of kaolin. Lletto took place on a Kady 30 Mill. Diluted to 63 p-Z, the viscosity of the slurry was 100 mPas / 50 r / min. Viscosity and Theological properties did not change with day-long storage. The slurry was used with good results for coating LWC paper.
35 Esimerkki 235 Example 2
Hienojakoista rakeistettua talkkia, jonka keskimääräinen raekoko oli 4 70805 2,2 pm ja jonka rakeistusveteen lisättiin polyalkyleeniglykolia (Pluriol® PE 6400) 1,2 X talkin kuivapainosta, dispergoitiin SPS-kao- liinista tehtyyn lietteeseen, jonka lleteveteen oli lisätty 0,3 paino-Fine granulated talc having an average grain size of 4 70805 2.2 μm, to which polyalkylene glycol (Pluriol® PE 6400) was added to the granulation water at 1.2 X dry weight of talc, was dispersed in a slurry of SPS-kaolin to which 0.3% by weight of
<D<D
osaa dispergointianetta (Polysalz^S), 0,02 paino-osaa natriumhydrok-5 sidia (kaikki pigmenttien kokonaispainosta). Lietteen lopullinen kuiva-ainepitoisuus oli 60,0 % ja siitä oli 50 % talkkia ja 50 X kaoliinia. Lietto tapahtui laboratoriossa Dlaf-laltteella. Lietteen viskositeetti oli 75 mPas/20 r/min. Viskositeetti ja reologieet ominaisuudet eivät muuttuneet vuorokauden kestäneessä varastoinnissa.parts of dispersant (Polysalz® S), 0.02 parts by weight of sodium hydroxide-5 (all by weight of the total pigments). The final dry matter content of the slurry was 60.0% and was 50% talc and 50 X kaolin. The slurry occurred in the laboratory on a Dlaf laltte. The viscosity of the slurry was 75 mPas / 20 r / min. Viscosity and rheological properties did not change with day-long storage.
1010
Kun lietettiin pelkästään hienojakoista talkkia lletetiheyteen 60 X, muodostui tarvittava liettoalka kaksinkertaiseksi. Lietteen viskositeetti oli 80 mPas/20 r/min. Viskositeetti ja reologieet ominaisuudet muuttuivat oleellisesti vuorokauden kestäneessä varastoinnissa. Liete 15 oli epästabiili.When only fine talc was slurried to a density of 60 X, the required slurry was doubled. The viscosity of the slurry was 80 mPas / 20 r / min. Viscosity and rheological properties changed substantially during storage for one day. Slurry 15 was unstable.
Esimerkki 3Example 3
Hienorakelsta rakeistettua talkkia, jonka keskimääräinen raekoko oli 20 2,5 pm, dispergoitiin keskimääräiseltä raekooltaan 1,7 Jim olevasta kal- siumkarbonaatista valmistettuun lietteeseen, jonka lleteveteen oli lisätty mm. 1,2 X polyalkyleeniglykolia (Pluriol®PE 6400) 1,2 p-X ja natriumhydroksidia 0,02 p-% talkin kuivapainosta. Dispergointi tapahtui laboratoriossa Diaf-laitteella. Lietteen lopullinen kuiva-ainepitoisuus 25 oli 60 X.Fine-grained granulated talc having an average grain size of 2.5 μm was dispersed in a slurry of calcium carbonate having an average grain size of 1.7 μm, to which was added e.g. 1.2 X polyalkylene glycol (Pluriol®PE 6400) 1.2 p-X and sodium hydroxide 0.02 wt% of the dry weight of talc. Dispersion took place in the laboratory with a Diaf device. The final dry matter content of the slurry 25 was 60 X.
Lietteen kiintoaineen raekoko eri karbonaatti-talkki-suhteilla oli seu-raava: 30 Talkki Karbonaatti Keskimääräinen raekoko laskettu mitattu ero 90 X 10 X 2,42 2,20 10 %The grain size of the slurry solid at different carbonate-talc ratios was as follows: 30 Talc Carbonate Average grain size calculated measured difference 90 X 10 X 2.42 2.20 10%
70 Z 30 % 2,26 2,10 7,6 X70 Z 30% 2.26 2.10 7.6 X
50 Z 50 X 2,10 1,90 10,5 X50 Z 50 X 2.10 1.90 10.5 X
Raekoot mitattiin Sedigraph-laitteella. Kokeissa päästiin lähes 10 X pienempiin raekokoihin kuin pigmenttien alkuperäisestä raekoosta laskemalla 35 5 70805 voisi olettaa. Tämä johtunee talkkiaglomeraattien hajoamisesta.Grain sizes were measured with a Sedigraph instrument. In the experiments, grain sizes almost 10 X smaller than the original grain size of the pigments were obtained by calculating 35 5 70805. This is probably due to the decomposition of the talc agglomerates.
Esimerkki 4 5 Hienorakeista rakeistettua talkkia, jonka keskimääräinen raekoko oli 2,5 pm, dispergoltiin Diaf-laitteella paperin päällystykseen tarkoitetusta kipsistä (CoCoat®) valmistettuun lietteeseen, jonka lieteveteen lisättiin polyetyleeniglykolia (Pluriol®6400) 1,2 p-% ja natriumhydroksi-dia 0,02 p-% talkin painosta. Lietteen lopullinen kiintöalnepitoisuus 10 oli n. 60 %. Seossuhteella 30 % kipsiä 70 % talkkia saatiin helposti hyvin dispergoltunut stabiili liete, jossa ei tapahtunut sedimentoitumista eikä oleellista viskositeetin muutosta kahden vuorokauden varastoinnissa.Example 4 5 Fine-grained granulated talc with an average grain size of 2.5 μm was dispersed on a slurry made of paper-coating gypsum (CoCoat®) with Diaf, to which 1.2% by weight of polyethylene glycol (Pluriol®6400) and sodium hydroxide were added to the sludge water. 0.02% by weight of talc. The final solids content of the slurry 10 was about 60%. With a mixture ratio of 30% gypsum to 70% talc, a well-dispersed stable slurry was easily obtained with no sedimentation and no significant change in viscosity after two days of storage.
Claims (9)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI841298A FI70805B (en) | 1984-03-30 | 1984-03-30 | FOERFARANDE FOER DISPERGERING AV TALK |
| PCT/FI1985/000030 WO1985004344A1 (en) | 1984-03-30 | 1985-03-28 | Procedure for dispersing talc |
| AT85901454T ATE44474T1 (en) | 1984-03-30 | 1985-03-28 | METHOD OF DISPERSING TALC. |
| EP85901454A EP0186665B1 (en) | 1984-03-30 | 1985-03-28 | Procedure for dispersing talc |
| DE8585901454T DE3571399D1 (en) | 1984-03-30 | 1985-03-28 | Procedure for dispersing talc |
| CA000477926A CA1247493A (en) | 1984-03-30 | 1985-03-29 | Procedure for dispensing talc |
| IT20153/85A IT1200440B (en) | 1984-03-30 | 1985-03-29 | PROCEDURE FOR THE DISPERSION OF TALCO |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI841298 | 1984-03-30 | ||
| FI841298A FI70805B (en) | 1984-03-30 | 1984-03-30 | FOERFARANDE FOER DISPERGERING AV TALK |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI841298A0 FI841298A0 (en) | 1984-03-30 |
| FI841298A FI841298A (en) | 1985-10-01 |
| FI70805B true FI70805B (en) | 1986-07-18 |
Family
ID=8518834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI841298A FI70805B (en) | 1984-03-30 | 1984-03-30 | FOERFARANDE FOER DISPERGERING AV TALK |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0186665B1 (en) |
| CA (1) | CA1247493A (en) |
| DE (1) | DE3571399D1 (en) |
| FI (1) | FI70805B (en) |
| IT (1) | IT1200440B (en) |
| WO (1) | WO1985004344A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI83897C (en) * | 1988-10-20 | 1991-09-10 | Finnminerals Oy | FOERFARANDE FOER FRAMSTAELLNING AV EN PIGMENTBLANDNING FOER BRUK VID YTBELAEGGNING AV PAPPER. |
| EP2229808A1 (en) | 2009-03-17 | 2010-09-22 | Incotec International B.V. | Seed coating composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1449129A (en) * | 1972-12-28 | 1976-09-15 | Laporte Industries Ltd | Production of magnesium silicates |
| AU3297878A (en) * | 1977-02-14 | 1979-08-09 | Lankro Chem Ltd | Talc dispersion |
| EP0050936A1 (en) * | 1980-10-23 | 1982-05-05 | ENGLISH CLAYS LOVERING POCHIN & COMPANY LIMITED | Improvements in or relating to the preparation of aqueous suspensions of talc |
| FI64674C (en) * | 1982-04-29 | 1983-12-12 | Ruskealan Marmori Oy | FOERFARANDE FOER FRAMSTAELLNING AV EN FYLLNADSMEDELS- OCH / ELLER BELAEGGNINGSPIGMENTBLANDNING FOER PAPPER |
-
1984
- 1984-03-30 FI FI841298A patent/FI70805B/en not_active Application Discontinuation
-
1985
- 1985-03-28 WO PCT/FI1985/000030 patent/WO1985004344A1/en active IP Right Grant
- 1985-03-28 EP EP85901454A patent/EP0186665B1/en not_active Expired
- 1985-03-28 DE DE8585901454T patent/DE3571399D1/en not_active Expired
- 1985-03-29 CA CA000477926A patent/CA1247493A/en not_active Expired
- 1985-03-29 IT IT20153/85A patent/IT1200440B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FI841298A (en) | 1985-10-01 |
| CA1247493A (en) | 1988-12-28 |
| IT1200440B (en) | 1989-01-18 |
| IT8520153A0 (en) | 1985-03-29 |
| EP0186665B1 (en) | 1989-07-12 |
| EP0186665A1 (en) | 1986-07-09 |
| FI841298A0 (en) | 1984-03-30 |
| DE3571399D1 (en) | 1989-08-17 |
| WO1985004344A1 (en) | 1985-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD | Application lapsed |
Owner name: OY PARTEK AB |