NO780055L - PROCEDURE FOR PREPARING VISCOSITY STABLE WATER DISTRIBUTIONS FOR PAPER COVERINGS - Google Patents
PROCEDURE FOR PREPARING VISCOSITY STABLE WATER DISTRIBUTIONS FOR PAPER COVERINGSInfo
- Publication number
- NO780055L NO780055L NO780055A NO780055A NO780055L NO 780055 L NO780055 L NO 780055L NO 780055 A NO780055 A NO 780055A NO 780055 A NO780055 A NO 780055A NO 780055 L NO780055 L NO 780055L
- Authority
- NO
- Norway
- Prior art keywords
- dispersion
- weight
- viscosity
- copolymers
- msa
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 3
- 239000006185 dispersion Substances 0.000 claims description 48
- 239000000049 pigment Substances 0.000 claims description 22
- 229920001577 copolymer Polymers 0.000 claims description 19
- 239000002270 dispersing agent Substances 0.000 claims description 19
- 239000000123 paper Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 238000010409 ironing Methods 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000005995 Aluminium silicate Substances 0.000 description 5
- 235000012211 aluminium silicate Nutrition 0.000 description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- WVKHCAOZIFYQEG-ODZAUARKSA-N (z)-but-2-enedioic acid;ethene Chemical group C=C.OC(=O)\C=C/C(O)=O WVKHCAOZIFYQEG-ODZAUARKSA-N 0.000 description 3
- AUMYCEAREPLZKC-ODZAUARKSA-N (z)-but-2-enedioic acid;prop-1-ene Chemical group CC=C.OC(=O)\C=C/C(O)=O AUMYCEAREPLZKC-ODZAUARKSA-N 0.000 description 3
- REFIPDXZLRMRDL-GRHBHMESSA-L [Na+].C(\C=C/C(=O)[O-])(=O)[O-].CC=C.[Na+] Chemical compound [Na+].C(\C=C/C(=O)[O-])(=O)[O-].CC=C.[Na+] REFIPDXZLRMRDL-GRHBHMESSA-L 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- -1 maleic acid-ethylene sodium salt Chemical compound 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
-
- 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
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
Description
Fremgangsmåte til fremstilling av Method for the production of
viskositetsstabile vandige dis-viscosity-stable aqueous dis-
persjoner for papirstrykemasser.persions for paper ironing masses.
Oppfinnelsen vedrører en fremgangsmåte til fremstilling av viskositetsstabile vandige pigmentdispersjoner til anvendelse som papirstrykemasser. The invention relates to a method for the production of viscosity-stable aqueous pigment dispersions for use as paper ironing materials.
Papirstrykemasser består i det vesentlige av iPaper ironing compounds essentially consist of i
vann dispergerte fyllstoffer, resp. pigmenter, dertil inne-holder de bindemidler og dispergeringsmidler, De anvendte pigmenter er eksempelvis kalsiumkarbonat, kaolin, kalsiumsulfo-aluminat og lignende. Vandige dispersjoner av disse pigmenter, som i praksis kan ha et faststoffinnhold fra 30 til 70 vekt-$ ville sedimentere iløpet av relativt kort tid resp. kaolin fast-gjøres ved utformning av den med de forskjellige elektriske ladninger fra flater og kanter av plateformede pigmentpartikler forårsakede såkalte korthuseffekt. Tilsetningen av dispergeringsmidler til pigmentoppslemmingen er derfor uungåelig for å holde konstant den ønskede forarbeidelsesviskositet. Dessuten fremkommer i praksis ofte problemet å øke viskositeten av stryke-farvene noe for en maskinrettet forarbeidelse således at det er ønskelig med en viskositetsøkende virkning av dispergeringsmidlet. Viktig er det imidlertid at den engang innstilte viskositet forblir konstant lengst mulig. water dispersed fillers, resp. pigments, to which they contain binders and dispersants. The pigments used are, for example, calcium carbonate, kaolin, calcium sulpho-aluminate and the like. Aqueous dispersions of these pigments, which in practice can have a solids content of 30 to 70% by weight, would sediment within a relatively short time or kaolin is fixed by shaping it with the different electrical charges from surfaces and edges of plate-shaped pigment particles caused by the so-called house of cards effect. The addition of dispersants to the pigment slurry is therefore unavoidable in order to keep the desired processing viscosity constant. Moreover, in practice, the problem of increasing the viscosity of the iron-on dyes somewhat for machine-directed processing often arises, so that a viscosity-increasing effect of the dispersant is desirable. However, it is important that the viscosity once set remains constant for as long as possible.
Dispergeringsmidler bevirker den nødvendige rheo-logiske stabilisering av dispersjonen. Dispergeringsvirkningen avhenger av økningen av Zeta-potensialet av pigmentpartiklene, den beror på det faktum at pigmentpartiklene får en overflate-ladning, avstøter seg fra hverandre og derved holdes i tilstand av en stabil dispersjon. Dispersants effect the necessary rheological stabilization of the dispersion. The dispersion effect depends on the increase of the Zeta potential of the pigment particles, it is based on the fact that the pigment particles acquire a surface charge, repel each other and are thereby kept in a state of a stable dispersion.
Det er kjent som dispergeringsmiddel for papirstrykemasser f.eks. å anvende komplekse fosfater, salter av polyfosforsyre eller salter av polykarboksylsyrer. It is known as a dispersant for paper ironing compounds, e.g. to use complex phosphates, salts of polyphosphoric acid or salts of polycarboxylic acids.
Ved den til teknikkens stand svarende anvendelse av disse vanlige stoffer som dispergeringsmidler har det vist seg at viskositeten av pigmentoppslemningen riktignok kan nedsettes, idet i det nedre skjæreområde fåes lave viskositets-verdier, i det høye skjæreområdet kan det imidlertid inntre uønsket dilatant flyteforhold - en målrettet økning av viskositeten er imidlertid bare mulig i begrenset grad, idet det ikke kan utelukkes fare for en fremadskridende. fortykning av strykemassen i løpet av en lengre lagringstid. Dessuten består en relativt snever avhengighet av virkningen av dispersjonens pH-verdi . By using these common substances as dispersants in accordance with the state of the art, it has been shown that the viscosity of the pigment slurry can indeed be reduced, as low viscosity values are obtained in the lower cutting area, but in the high cutting area an undesirable dilatant flow condition can occur - a targeted however, an increase in viscosity is only possible to a limited extent, as the risk of a progressive increase cannot be ruled out. thickening of the ironing compound during a longer storage period. Moreover, there is a relatively narrow dependence of the effect on the pH value of the dispersion.
Følgelig vedrører foreliggende oppfinnelse stoffer egnet for pigmentdispergering, som over et bredt viskositets-område utøver sin virkning uavhengig av pH-verdien, uten at dispergeringsvirkningen blir dårligere ved lengre lagring av strykemassen. Accordingly, the present invention relates to substances suitable for pigment dispersion, which over a wide viscosity range exert their effect independently of the pH value, without the dispersing effect becoming worse with longer storage of the ironing mass.
Det er nå overraskende funnet at man kommer til pigmentdispersjoner uten de omtalte ulemper når man anvender spesielle maleinsyreanhydr iid-kopolymerisater, i det følgende kalt MSA-kopolymerisater, som dispergeringsmidler. It has now surprisingly been found that pigment dispersions are obtained without the mentioned disadvantages when special maleic anhydride copolymers, hereinafter called MSA copolymers, are used as dispersants.
Dette funn er spesielt overraskende, da MSA-kopolymerisatene ifølge oppfinnelsen omhyggelig ble undersøkt på deres anvendelse på papirsektoren, derved ble det bare fastslått en anvendelse som papirlimemiddel resp. bindemiddel. This finding is particularly surprising, as the MSA copolymers according to the invention were carefully investigated for their use in the paper sector, thereby only establishing an application as a paper sizing agent or binder.
Oppfinnelsens gjenstand er følgelig en fremgangsmåte til fremstilling av viskositetsstabile vandige pigment-dispers joner for papirstrykemasser under anvendelse av vanlige fyllstoffer resp. pigmenter og spesielle MSA-kopolymerisater samt eventuelt de vanlige tilsetninger, idet fremgangsmåten erkarakterisert vedat det som maleinsyreanhydrid-kopolymerisater anvendes slike med den generelle formel i mengder fra 0,05 til 5,0 vekt#,. fortrinnsvis 0,2 til 0,5 vekt$, referert til pigmentdelen, hvori R, og R2er like eller forskjellige og betyr -H eller -CH-^og M, og M2er like og betyr The object of the invention is therefore a method for the production of viscosity-stable aqueous pigment dispersions for paper coating materials using common fillers or pigments and special MSA copolymers as well as possibly the usual additives, the method being characterized by the use of those with the general formula as maleic anhydride copolymers in quantities from 0.05 to 5.0 by weight. preferably 0.2 to 0.5 wt%, referred to the pigment part, wherein R, and R 2 are the same or different and mean -H or -CH-^ and M, and M 2 are the same and mean
-O-alkalimetall, fortrinnsvis -ONa, eller'-ONH^eller og M2er forskjellige og M-^betyr -NH"2 eller lavere aminer og M2-O-alkali metal, preferably -ONa, or'-ONH^or and M2 are different and M-^means -NH"2 or lower amines and M2
betyr -0H eller -O-alkalimetall, resp. -ONH^og n betyr et helt tall fra 2 til 500, fortrinnsvis 5 til 300. means -OH or -O-alkali metal, resp. -ONH^ and n means an integer from 2 to 500, preferably 5 to 300.
Egnede MSA-kopolymerisater innen oppfinnelsens ramme og som tilsvarer den ovenfor anførte generelle formel er eksempelvis maleinsyre - propylen.- natriumsalt, maleinsyre - propylen - ammoniumsalt, maleinsyre - etylen - natriumsalt, maleinsyre - etylen - ammoniumsalt, maleinsyre - propylen - halvamid, maleinsyre - etylen - halvamid. Det kan også anvendes blandinger av maleinsyreanhydrid-kopolymerisatene innen oppfinnelsens ramme,1 likeledes blandinger med vanlige dispergeringsmidler . Suitable MSA copolymers within the scope of the invention and which correspond to the above general formula are, for example, maleic acid - propylene - sodium salt, maleic acid - propylene - ammonium salt, maleic acid - ethylene - sodium salt, maleic acid - ethylene - ammonium salt, maleic acid - propylene - hemiamide, maleic acid - ethylene - semiamide. Mixtures of the maleic anhydride copolymers can also be used within the scope of the invention,1 as well as mixtures with common dispersants.
De ifølge oppfinnelsen anvendbare MSA-kopolymerisater"'kan fremstilles etter i og for seg kjente fremgangsmåter. The MSA copolymers that can be used according to the invention can be prepared according to methods known per se.
Tilberedningen av pigmentdispersjoner ifølge oppfinnelsen foregår på enkel måte: I første rekke oppløses MSA-kopolymerisatene ifølge oppfinnelsen i vann, denne oppløs-ning innstilles med alkali, f.eks. natronlut eller ammoniakk på den tilsvarende pH-verdi, i løpet av 10 minutter tilsettes under omrøring pigmentene og deretter omrøres videre i 10 minutter. The preparation of pigment dispersions according to the invention takes place in a simple way: First of all, the MSA copolymers according to the invention are dissolved in water, this solution is adjusted with alkali, e.g. caustic soda or ammonia at the corresponding pH value, within 10 minutes the pigments are added while stirring and then stirred for a further 10 minutes.
De således dannede pigmentdispersjoner kan hvis nødvendig blandes med vanlige tilsetninger, som bindemidler, farvestoffer, skumdempere og lignende . The pigment dispersions formed in this way can, if necessary, be mixed with common additives, such as binders, dyes, foam suppressors and the like.
De ved fremgangsmåten ifølge oppfinnelsen fremstilte pigmentdispersjoner kan.finne anvendelse til strykning og beleg-ning av fiberaktige substrater som papir og papp. The pigment dispersions produced by the method according to the invention can be used for ironing and coating fibrous substrates such as paper and cardboard.
Fordelene ved de omtalte pigmentdispersjoner ligger deri at ved tilsetningen av MSA-kopolymerisatene ifølge oppfinnelsen forblir dispersjonenes viskositet konstant over lengre tid på den ønskede verdi . The advantages of the mentioned pigment dispersions lie in the fact that when the MSA copolymers according to the invention are added, the viscosity of the dispersions remains constant for a long time at the desired value.
Videre ble det fastslått at dispersjonens pH-verdi ikke utøver noen vesentlig innvirkning på virkningen av MSA-kopolymerisatene . Furthermore, it was determined that the pH value of the dispersion does not exert any significant influence on the action of the MSA copolymers.
Eksempel 1.Example 1.
Dispersjon I.Dispersion I.
Kalsiumkarbonat med betegnelsen "Millicarb" ble i løpet av 10 minutter innrørt i en vandig, med NaOH til en pH-verdi på 9 innstillet oppløsning av maleinsyreanhydrid-kopolymerisatet ifølge oppfinnelsen med formel Calcium carbonate with the designation "Millicarb" was stirred within 10 minutes into an aqueous solution of the maleic anhydride copolymer according to the invention with NaOH adjusted to a pH value of 9 with the formula
og et.propylen-MSA-forhold på 1:1 og homogenisert ytterligere 10 minutter. Den således fremstilte dispersjon hadde et fast-stoff innhold på 55 vekt$ og inneholdt 0,3 vekt% av dispergeringsmidlet ifølge oppfinnelsen. and et.propylene-MSA ratio of 1:1 and homogenized an additional 10 minutes. The dispersion thus produced had a solids content of 55% by weight and contained 0.3% by weight of the dispersant according to the invention.
Dispersjon II. (Sammenligning)Dispersion II. (Comparison)
Denne dispersjon ble fremstillet som dispersjon I, med den forskjell at istedenfor maleinsyre-propylen-natriumsaltet ifølge oppfinnelsen ble det anvendt et dispergeringsmiddel på MSA-styren-basis. This dispersion was prepared as dispersion I, with the difference that instead of the maleic acid-propylene sodium salt according to the invention, a dispersing agent based on MSA-styrene was used.
Dispersjon III.Dispersion III.
Kaolin med betegnelsen "SPS" ble dispergert analogt dispersjon I. Som stoff ifølge oppfinnelsen ble det anvendt et kopolymerisat med formel Kaolin with the designation "SPS" was dispersed analogously to dispersion I. As a substance according to the invention, a copolymer with the formula was used
med et propylen-MSA-forhold på 1:1 i vandig, med NaOH til en pH-verdi på 9 innstillet oppløsning. Den således fremstilte dispersjon hadde et faststoffinnhold på 55 vekt% og et disper-geringsmiddelinnhold på 0,3 vekt% . with a propylene-MSA ratio of 1:1 in aqueous, with NaOH to a pH of 9 adjusted solution. The dispersion produced in this way had a solids content of 55% by weight and a dispersant content of 0.3% by weight.
Dispersjon IV. (Sammenligning)Dispersion IV. (Comparison)
Denne dispersjon ble fremstillet med kaolin "SPS"', forøvrig imidlertid som dispersjon II. This dispersion was prepared with kaolin "SPS", otherwise however as dispersion II.
Av dispersjonene I til IV ble det målt viskosi-tetene 20°C. Målingen foregikk med en gang etter fremstillingen, etter 1, 2 og 24 timer. Resultatene er oppstillet i følgende t ab e 11. The viscosities of the dispersions I to IV were measured at 20°C. The measurement took place immediately after preparation, after 1, 2 and 24 hours. The results are listed in the following table 11.
Det sees at■de innen oppfinnelsens ramme fremstilte dispersjoner I og III har bibeholdt sin viskositet under lagring, mens derimot sammenligningsdispersjonene II og IV har en sterk økning i viskositeten. It can be seen that the dispersions I and III produced within the scope of the invention have retained their viscosity during storage, while, on the other hand, the comparison dispersions II and IV have a strong increase in viscosity.
Eksempel 2 .Example 2.
Det ble fremstillet dispersjoner analogt IIIDispersions were prepared analogously to III
og IV. Faststoffinnholdet utgjorde 50, 55 og 60 vekt%. De på disse dispersjoner målte viskositeter angis i tabell 2: and IV. The solids content was 50, 55 and 60% by weight. The viscosities measured on these dispersions are listed in table 2:
Eksempel 5. Example 5.
Tabell 3 viser sterk-uavhengighet av dispersjonen ifølge oppfinnelsen av pH-verdien. Det ble fremstillet dispersjoner analogt III og IV og innstillet med NaOH på pH-verdier på 8, 9 og 10. Table 3 shows the strong independence of the dispersion according to the invention from the pH value. Dispersions analogous to III and IV were prepared and adjusted with NaOH to pH values of 8, 9 and 10.
Eksempel' 4 . Example' 4 .
Dispersjon III med et innhold på 55 vekt% kaolin og 0,3 vekt% av dispergeringsmidlet ifølge oppfinnelsen propylen - maleinsyre - halvamid ble innstillet med NaOH på pH 9 og lagret i 520 timer ved værelsestemperatur. Figur 1 viser det jevne Dispersion III with a content of 55% by weight kaolin and 0.3% by weight of the dispersant according to the invention propylene - maleic acid - half amide was adjusted with NaOH to pH 9 and stored for 520 hours at room temperature. Figure 1 shows the even
forløp av viskositeten av denne dispersjon over det samlede course of the viscosity of this dispersion over the total
lagringstidsrom og tydeliggjør således virkningen av MSA-kopolymerisatene innen oppfinnelsens ramme. storage period and thus clarifies the effect of the MSA copolymers within the scope of the invention.
Eksempel 5 ■ Example 5 ■
Dispersjon V.Dispersion V.
Kalsiumkarbonat ble i løpet av 10 minutter innrørt i en vandig, med NHijOH til en pH-verdi på 9 innstillet oppløs-ning av maleinsyreanhydrid-kopolymerisat ifølge oppfinnelsen med formel During 10 minutes, calcium carbonate was stirred into an aqueous solution of maleic anhydride copolymer according to the invention with NHijOH adjusted to a pH value of 9 with the formula
med et etylen-MSA-forhold på 1:1 og homogenisert, ytterligere i 10 minutter. Den således fremstilte dispersjon hadde et faststoffinnhold på 55 vekt% og inneholdt 0,2 vekt% av dispergeringsmidlet ifølge oppfinnelsen. with an ethylene-MSA ratio of 1:1 and homogenized, for a further 10 minutes. The dispersion thus produced had a solids content of 55% by weight and contained 0.2% by weight of the dispersant according to the invention.
Dispersjon VI.Dispersion VI.
Denne dispersjon ble fremstillet som dispersjon V, den inneholdt 0,3 vekt% dispergeringsmiddel. This dispersion was prepared as dispersion V, it contained 0.3% by weight of dispersant.
Dispersjon VII.Dispersion VII.
Denne dispersjon ble fremstillet med 0,4 vekt% dispergeringsmiddel, forøvrig som dispersjon V. This dispersion was prepared with 0.4% by weight dispersant, otherwise as dispersion V.
På dispersjonene V til VII ble' det målt viskositet ved 20°C. Målingen foregikk med en gang etter fremstillingen, etter 1, 2 og 24 timer. Resultatene er oppstillet i tabell 4. On the dispersions V to VII, viscosity was measured at 20°C. The measurement took place immediately after preparation, after 1, 2 and 24 hours. The results are listed in table 4.
Eksempel 6. Example 6.
Dispersj on VIII.Dispersion on VIII.
Denne dispersjon ble fremstillet som dispersjon I, med den forskjell at istedenfor 0,3 vekt% maleinsyre-propylen- natriumsalt ble det anvendt en blanding av 0,2 vekt% maleinsyre-etylen-natriumsalt med 0,2 vekt% maleinsyre-propylen-natriumsalt (tilsammen 0,4 vekt% dispergeringsmiddel). Viskositets-målingen foregikk som i eksempel 1, resultatene fremgår av tabell 5- This dispersion was prepared as dispersion I, with the difference that instead of 0.3% by weight maleic acid-propylene sodium salt, a mixture of 0.2% by weight maleic acid-ethylene sodium salt with 0.2% by weight maleic acid-propylene sodium salt was used (a total of 0.4% by weight dispersant). The viscosity measurement took place as in example 1, the results appear in table 5-
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772700444 DE2700444A1 (en) | 1977-01-07 | 1977-01-07 | PROCESS FOR THE PREPARATION OF VISCOSITY STABLE AQUATIC DISPERSIONS FOR PAPER COATING COMPOUNDS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO780055L true NO780055L (en) | 1978-07-10 |
Family
ID=5998228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO780055A NO780055L (en) | 1977-01-07 | 1978-01-06 | PROCEDURE FOR PREPARING VISCOSITY STABLE WATER DISTRIBUTIONS FOR PAPER COVERINGS |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT360336B (en) |
| BE (1) | BE862696A (en) |
| CH (1) | CH633846A5 (en) |
| DE (1) | DE2700444A1 (en) |
| ES (1) | ES465730A1 (en) |
| FI (1) | FI62957B (en) |
| FR (1) | FR2376691A1 (en) |
| GB (1) | GB1593582A (en) |
| IT (1) | IT7819066A0 (en) |
| LU (1) | LU78815A1 (en) |
| NL (1) | NL7800177A (en) |
| NO (1) | NO780055L (en) |
| SE (1) | SE426962B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3037989A1 (en) * | 1980-10-08 | 1982-05-13 | Basf Ag, 6700 Ludwigshafen | CONCENTRATED LIQUID PREPARATIONS OF INORGANIC PIGMENTS AND THEIR USE |
| DE19811791A1 (en) | 1998-03-18 | 1999-09-23 | Borchers Gmbh | Aqueous dispersions with a special combination of dispersants |
| FI118091B (en) * | 2001-10-03 | 2007-06-29 | Ciba Sc Holding Ag | New composition for coating paste |
| FI20115664A0 (en) | 2011-06-23 | 2011-06-23 | Kemira Oyj | Polymer product and its use as a dispersant |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3000840A (en) * | 1957-12-20 | 1961-09-19 | Monsanto Chemicals | Dispersing agents |
-
1977
- 1977-01-07 DE DE19772700444 patent/DE2700444A1/en not_active Withdrawn
-
1978
- 1978-01-03 ES ES465730A patent/ES465730A1/en not_active Expired
- 1978-01-04 AT AT6078A patent/AT360336B/en not_active IP Right Cessation
- 1978-01-05 SE SE7800160A patent/SE426962B/en unknown
- 1978-01-05 CH CH10178A patent/CH633846A5/en not_active IP Right Cessation
- 1978-01-05 LU LU78815A patent/LU78815A1/en unknown
- 1978-01-05 GB GB373/78A patent/GB1593582A/en not_active Expired
- 1978-01-06 IT IT7819066A patent/IT7819066A0/en unknown
- 1978-01-06 BE BE184147A patent/BE862696A/en not_active IP Right Cessation
- 1978-01-06 NL NL7800177A patent/NL7800177A/en not_active Application Discontinuation
- 1978-01-06 NO NO780055A patent/NO780055L/en unknown
- 1978-01-06 FR FR7800356A patent/FR2376691A1/en not_active Withdrawn
- 1978-01-06 FI FI780047A patent/FI62957B/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI780047A (en) | 1978-07-08 |
| GB1593582A (en) | 1981-07-22 |
| ATA6078A (en) | 1980-05-15 |
| CH633846A5 (en) | 1982-12-31 |
| BE862696A (en) | 1978-05-02 |
| LU78815A1 (en) | 1978-06-09 |
| FR2376691A1 (en) | 1978-08-04 |
| SE7800160L (en) | 1978-07-08 |
| NL7800177A (en) | 1978-07-11 |
| AT360336B (en) | 1980-01-12 |
| IT7819066A0 (en) | 1978-01-06 |
| SE426962B (en) | 1983-02-21 |
| FI62957B (en) | 1982-12-31 |
| DE2700444A1 (en) | 1978-07-13 |
| ES465730A1 (en) | 1979-07-16 |
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