WO2000004229A1 - Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier - Google Patents

Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier Download PDF

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Publication number
WO2000004229A1
WO2000004229A1 PCT/EP1999/005054 EP9905054W WO0004229A1 WO 2000004229 A1 WO2000004229 A1 WO 2000004229A1 EP 9905054 W EP9905054 W EP 9905054W WO 0004229 A1 WO0004229 A1 WO 0004229A1
Authority
WO
WIPO (PCT)
Prior art keywords
starch
use according
units
weight
paper
Prior art date
Application number
PCT/EP1999/005054
Other languages
German (de)
English (en)
Inventor
Johann Schulte
Joachim Werres
Ulrich Fischer
Hans-Georg Hartan
Original Assignee
Stockhausen Gmbh & Co. Kg
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 Stockhausen Gmbh & Co. Kg filed Critical Stockhausen Gmbh & Co. Kg
Priority to EP99938266A priority Critical patent/EP1102894B1/fr
Priority to AT99938266T priority patent/ATE226663T1/de
Priority to BR9912832-2A priority patent/BR9912832A/pt
Priority to CA002336660A priority patent/CA2336660A1/fr
Priority to JP2000560317A priority patent/JP2002520510A/ja
Priority to DE59903194T priority patent/DE59903194D1/de
Priority to AU52835/99A priority patent/AU5283599A/en
Publication of WO2000004229A1 publication Critical patent/WO2000004229A1/fr
Priority to NO20010286A priority patent/NO20010286D0/no

Links

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
    • 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
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates

Definitions

  • the invention relates to the use of starch or starch derivatives which have been modified with polyelectrolytes based on dialkylaminoalkyl (meth) acrylamides and digested in the presence of inorganic additives, as retention agents for pigments, mineral fillers and fibrous fines in papermaking.
  • Pigments and fillers are added as essential paper components in the manufacture of the paper pulp dispersion and bound with the help of retention aids during sheet formation.
  • retention aids e.g. B. according to the information in the weekly paper for paper factories 5 (1991), pp. 149 to 154, cationic mass starches are used extensively as colloidal auxiliaries, with the use of cationic starch ethers according to Ullmann, 4th edition, 1979, vol. 17 , P. 581, in particular the retention of pigments and fines is improved.
  • high molecular weight, cationic polyelectrolytes with a higher charge density can also be used as retention agents.
  • Such high molecular weight polyelectrolytes are, for example, the copolymers of acrylamide and the esters of (meth) acrylic acid with di-CrC 2 -alkylamino-C 2 -C 6 -alkyl alcohols or the copolymers of acrylamide and the amides of (meth) acrylic acid with di-C ⁇ - C 2 - alkylamino-C 2 -C 6 alkylamines, each of which is present in protonated or quaternized form.
  • Retention agents based on such ⁇ , ⁇ -unsaturated N-substituted carboxamides are described in EP-A-0 038 573.
  • a process for papermaking in which, to improve the retention, colloidal binders are added to the paper pulp, which binders are modified on the surface with aluminum silicate Silicic acid and cationic or amphoteric carbohydrates, such as preferably
  • EP-A-0 703 314 and WO 97/04168 propose the use of special cationic amylopectin starches to improve retention with the optional use of colloidal silica, anionic polyacrylamides or bentonite.
  • Microparticle systems are also known as retention agents from the weekly paper for paper manufacture 20, 1994, pp. 785 to 790, in which the pulp dispersion is first pretreated, flocked and dispersed with cationic starch or cationic polyacrylamides and then before the sheet is formed by silica microparticle systems or by addition be flocked again by bentonite or aluminum salts.
  • the multi-stage procedure leads to an improvement in the retention values.
  • EP-B-0 227465 describes a process for the production of paper in which, in complex sub-steps, first the fibrous material and, separately, the mineral filler with a synthetic polyelectrolyte each have the same charge and then the treated filler with a polymeric polyelectrolyte with opposite charge is treated.
  • EP-A-0 803 512 a method for producing cationic starch is known, according to which the starch is dry at temperatures from 60 to 200 ° C. for the duration from 10 minutes - 5 hours toasted with cationic polymers to be used as a paper strengthening agent.
  • EP-B-0 282 761, WO 96/05373 and WO 96/13525 describe the modification of starch with ionic, especially cationic, polyelectrolytes.
  • cationic polymers of diallyldimethylammonium chloride, N-vinylamine or N-vinylimidazoline are heated with native or already digested potato starch, while according to WO 96/05373 cationic polymers with preferably anionic starch and preferably according to WO 96/13525 are hydrolyzed , cationic polymers of N-vinylformamide, polyethyleneimines or polyalkylamines with starch of any kind are implemented.
  • These starch products like starches modified with copolymers of (meth) acrylamide and dialkylamioalkyl (meth) acrylamide, are only recommended as dry strength agents for papermaking.
  • the object of the present invention was therefore to improve the retention of pigments, fillers and fines without additional process steps, ie without the above-mentioned substeps, in known paper production, preferably using waste paper, without adversely affecting the mechanical strength of the paper becomes.
  • modified starch which is obtained by digesting starch, starch derivatives and / or their degradation products in aqueous solution in the presence of at least one cationic polymer, built up from at least 20% by weight of polymerized di-alkylaminoalkyl (meth) acrylic acid amide -Units, which are present in protonated, preferably quaternized form, and with the addition of at least one particulate additive based on an inorganic mineral, obtained before, during or after digestion, as retention agents for pigments, inorganic fillers and fines in papermaking.
  • native starch such as potato starch, wheat starch, cereal flour, maize starch, tapioca starch, sago starch and starch with an increased hydrolysis content, rice starch, pea starch and / or their mixtures
  • starch degradation products in particular dextrins or oxidized starches, such as dialdehyde starch, starch derivatives, such as chemically modified derivatives Starches, especially anionic starches, such as carboxy starch and starch degraded by persulfate, anionic starch esters, such as.
  • anionic starch esters such as.
  • anionic starch esters such as.
  • N-containing starch ethers especially starches with primary or secondary amino or imino groups and tertiary amino groups, which are positively charged by protonation with acids and contain quaternized ammonium groups.
  • Native starches such as potato starch, wheat starch, corn starch, rice starch, pea starch and / or mixtures thereof, and anionic starch and / or cationic N-containing starch ethers are preferably used.
  • Cationic polymers used are homo- or copolymers of dialkylaminoalkyl (meth) acrylic acid amides which contain at least 20% by weight polymerized units of amides of (meth) acrylic acid and / or acrylic acid and preferably di-C 1 -C 2 -alkylamino-C 2 - Contain C 6 alkylamines, each of which is present in protonated or quaternized form.
  • Their manufacture is, for example, in EP-A-0 013416 or in EP-A-0 113 038, the corresponding
  • Such polymerized units are preferably derived from protonated or quaternized N-dialkyl-substituted (meth) acrylic acid amides, such as, for example, dimethylaminoethyl acrylamide or methacrylamide, dimethylaminopropyl acrylamide or methacrylamide, diethylaminopropyl acrylamide or methacrylamide, diethylaminoethyl acrylamide or methacrylamide, diethylaminomethyl acrylamide or methacrylamide and N ', N', dimethylamino-2,2-dimethylpropyl acrylamide or methacrylamide or mixtures thereof, which have been reacted with known quaternizing agents.
  • suitable quaternizing agents are dimethyl sulfate, diethyl sulfate, methyl chloride, ethyl chloride, preferably dimethyl sulfate or methyl chloride.
  • the polyelectrolytes can still further units of monounsaturated monomers, such as. B. diallyldimethylammonium chloride.
  • Such polymerized monomers can also be water-soluble, nonionic monomers such as acrylamide, methacrylamide, NC 1 -C 2 alkylated (meth) acrylamides, N-vinylamide, vinylformamide, N-vinyl acetamide, N-vinyl-N-methylacetamide, N-vinyl pyrrolidone.
  • Suitable water-soluble monomers are also N-methylolacrylamide, N-methylol-methacrylamide and the N-methylol (meth) acrylic amides which are partially or fully etherified with monohydric d to C alcohols.
  • the copolymers can contain to a limited extent, preferably up to 10% by weight, sparingly water-soluble and / or water-insoluble, simply ethylenically unsaturated monomers, such as (meth) acrylic acid alkyl esters and vinyl acetate, provided the solubility of the copolymers is retained in water.
  • the polymers to be used according to the invention preferably have a molecular weight MG (g / mol) in the range from 1.0 ⁇ 10 5 to 40 ⁇ 10 6 , particularly preferably in the range from 2.0 ⁇ 10 6 to 15 ⁇ 10 6 and very particularly preferably from 5 x 10 6 to 15 x 10 6 .
  • the viscosity was determined using a 1% polymer solution in one
  • particulate additives based on inorganic minerals can also consist of clay, preferably swellable, silica, preferably silica sol and / or with aluminum-modified polysilicates, polyorthosilicic acid, with aluminum-modified polysilicates or polyorthosilicic acid, bentonite, titanium dioxide or talc.
  • clay preferably swellable, silica, preferably silica sol and / or with aluminum-modified polysilicates, polyorthosilicic acid, with aluminum-modified polysilicates or polyorthosilicic acid, bentonite, titanium dioxide or talc.
  • Bentonite, talc, titanium dioxide or silica sol is particularly preferably used.
  • the starch component can be reacted with the cationic homopolymers or copolymers of preferably protonated or quaternized dialkylaminoalkyl (meth) acrylic acid amides in aqueous dispersion batchwise in a reaction vessel or in a continuous flow process, for example in a jet cooker under the action of heat at temperatures of 70-130 ° C. , preferably from 90 - 100 ° C, with the addition of the inorganic additive and optionally under pressure with the starch component being digested.
  • the reaction conditions and the suitable apparatus conditions correspond to the information in the weekly paper for paper 4, 1991, pp. 127-130, the disclosure of which is introduced as a reference.
  • additives based on inorganic minerals in amounts of 0.1 to 15% by weight, preferably 3 to 15% by weight, particularly preferably 5 to 13% by weight, based on the modified starch component, before the preparation of the modified starch components the starch digestion or during the starch digestion, preferably before the modifying reaction and the digestion with the cationic homo- or copolymer, results in a retention agent with improved effectiveness in the retention capacity of fillers and fines. ?
  • the aqueous dispersion of the starch component which has not yet been digested and used for the modification preferably has a content of 0.5 to 20% by weight, preferably 0.5 to 10% by weight and particularly preferably 2.0 to 10% by weight of the starch component .
  • the aqueous solution of the polyelectrolyte used for the modification has a content of 0.1 to 2.0% by weight, preferably 0.1 to 0.5% by weight and particularly preferably 0.1 to 0.3% by weight, of cationic homo - or copolymers.
  • the weight ratio of starch component to cationic polyelectrolyte in the modification is in the range from 4: 1 to 25: 1, preferably in the range from 10: 1 to 25: 1 and particularly preferably in the range from 14: 1 to 20: 1.
  • the modified starch products together with the inorganic additives can, preferably in the form of an aqueous solution, be used as retention agents in the production of all types of paper and cardboard. They are preferably suitable for use in the production of paper on sulfite or sulfate pulp in the bleached or unbleached state, where this fiber material can consist of up to 100% by weight of wood pulp and / or waste paper, and for this reason alone a high proportion of mineral fillers, Has pigments and fibrous fines.
  • the retention agent according to the invention is added to the aqueous paper pulp dispersion in an amount of 0.1 to 10% by weight solids, preferably 0.5 to 5% by weight and particularly preferably 1.0 to 3% by weight, based on the dry matter or Pulp, added before the headbox of the paper machine, preferably as an aqueous solution with stirring. It is added to the aqueous dispersion, which already contains or has been added as fillers calcium carbonate, kaolin, aluminum silicate and oxide hydrates, satin white, talc, gypsum, barite, calcium silicate and lithopone, diatomaceous earth and synthetic, organic fillers from the recycling material.
  • the retention agent according to the invention is advantageously added to the material dispersion in the machine chest, before the vertical classifier and before or after the material pump before the sheet formation.
  • the retention agent according to the invention based on modified starch and inorganic additives achieves excellent retention of the fillers and surprisingly prevents the strength values from being impaired despite the increase in the filler and thus the ash content of the paper. This applies in particular to the use of paper pulp dispersions which contain or consist of portions of waste paper or wood pulps such as wood pulp and thermomechanical material (TMP).
  • the use of the retention aid according to the invention does not impair the effect of optical brighteners which are added to the paper stock to improve the whiteness.
  • a mixed water-soluble cationic polymer provided with different amounts of bentonite or with the addition of talc and heated to a temperature of 95 to 100 ° C.
  • no mineral was added. The mixture was held in this temperature range for 15 to 20 minutes, then cooled and used as a retention aid.
  • Copolymers of trimethylammonium propylacrylamide chloride and acrylamide with a quaternized monomer content of 70% by weight were used as water-soluble cationic polymers.
  • test sheets with a basis weight of approx. 100 g / m 2 were produced in the laboratory according to the Rapid Koethen method in accordance with DIN 54358 with the sheet forming device model 20-12 MC from Haage. The leaves were dried and overnight under normal conditions at 23 ° C and 50% rel. Humidity stored.
  • the total retention gives the ratio of the amount of dry substance used for paper production to that remaining in the finished paper Amount of substance again. This can be determined by weighing the respective quantities of substance.
  • the ash retention represents the ratio of the ash content of the (dry) amount of material used for paper production to the ash content of the finished paper. This is determined by determining the respective ash content.
  • the fines retention shows the ratio of the fines content of the (dry) amount of paper used for paper production to the fines content of the finished paper.
  • the corresponding fines content is determined using a Britt Dynamic Drainage Jar as follows:
  • the coarse fraction corresponds to the amount of fiber that is on the filter.

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  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Utilisation d'amidon modifié obtenu par dissolution d'amidon, de dérivés d'amidon et/ou de leurs produits de dégradation dans une solution aqueuse en présence d'au moins un polymérisat cationique constitué d'au moins 20 % en poids d'unités d'amide d'acide dialkylaminoalkyl(méth)acrylique polymérisées protonées ou quaternisées et d'au moins une substance minérale inorganique, en tant qu'agent de rétention pour des pigments, des matières de charge inorganiques et des fines dans la fabrication du papier.
PCT/EP1999/005054 1998-07-17 1999-07-15 Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier WO2000004229A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP99938266A EP1102894B1 (fr) 1998-07-17 1999-07-15 Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier
AT99938266T ATE226663T1 (de) 1998-07-17 1999-07-15 Verwendung von modifizierten stärkeprodukten als retentionsmittel bei der papierherstellung
BR9912832-2A BR9912832A (pt) 1998-07-17 1999-07-15 Uso de produtos de amido modificados como agente de retenção na produção de papel
CA002336660A CA2336660A1 (fr) 1998-07-17 1999-07-15 Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier
JP2000560317A JP2002520510A (ja) 1998-07-17 1999-07-15 改質スターチ製品の、紙製造への保持剤としての使用
DE59903194T DE59903194D1 (de) 1998-07-17 1999-07-15 Verwendung von modifizierten stärkeprodukten als retentionsmittel bei der papierherstellung
AU52835/99A AU5283599A (en) 1998-07-17 1999-07-15 The use of modified starch products as retention agents in the production of paper
NO20010286A NO20010286D0 (no) 1998-07-17 2001-01-17 Anvendelse av modifiserte stivelsesprodukter som retensjonsmidler ved fremstilling av papir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19832241A DE19832241A1 (de) 1998-07-17 1998-07-17 Verwendung von modifizierten Stärkeprodukten als Retentionsmittel bei der Papierherstellung
DE19832241.0 1998-07-17

Publications (1)

Publication Number Publication Date
WO2000004229A1 true WO2000004229A1 (fr) 2000-01-27

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Application Number Title Priority Date Filing Date
PCT/EP1999/005054 WO2000004229A1 (fr) 1998-07-17 1999-07-15 Utilisation d'amidons modifies en tant qu'agents de retention dans la fabrication de papier

Country Status (10)

Country Link
EP (1) EP1102894B1 (fr)
JP (1) JP2002520510A (fr)
CN (1) CN1309737A (fr)
AT (1) ATE226663T1 (fr)
AU (1) AU5283599A (fr)
BR (1) BR9912832A (fr)
CA (1) CA2336660A1 (fr)
DE (2) DE19832241A1 (fr)
NO (1) NO20010286D0 (fr)
WO (1) WO2000004229A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176254A1 (fr) * 2000-07-24 2002-01-30 The Dow Chemical Company Utilisation de dispersions d'amidon reticulé dans la fabrication du papier

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10121418A1 (de) * 2001-05-02 2003-01-23 Stockhausen Chem Fab Gmbh Verfahren zur Herstellung von Faserformkörpern
JP4712322B2 (ja) * 2004-06-30 2011-06-29 日本製紙株式会社 印刷適性向上剤およびこれを塗布した紙
CN100572434C (zh) * 2007-06-05 2009-12-23 内江市春江纸业有限公司 一种改性淀粉组合物的制备方法
CN102852038A (zh) * 2012-09-24 2013-01-02 济南晨光纸业有限公司 一种提高彩色羊皮纸鲜艳度并有效防止掉色的方法
CN105964887A (zh) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 一种以热塑性氧化淀粉改性动物胶作为粘接剂的高透气性型砂及其制备方法
CN107217528B (zh) * 2017-06-21 2018-06-29 合肥龙发包装有限公司 一种抗油脂食品包装纸
CN115818655B (zh) * 2022-11-01 2024-03-26 江西广源化工有限责任公司 一种片状滑石粉及其制备方法和在制备淋膜原纸中的应用

Citations (10)

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US4097427A (en) * 1977-02-14 1978-06-27 Nalco Chemical Company Cationization of starch utilizing alkali metal hydroxide, cationic water-soluble polymer and oxidant for improved wet end strength
FR2396831A1 (fr) * 1977-07-04 1979-02-02 Scholten Honig Research Nv Perfectionnement aux charges minerales utilisees dans la fabrication du papier et du carton
US4388150A (en) * 1980-05-28 1983-06-14 Eka Aktiebolag Papermaking and products made thereby
US4753710A (en) * 1986-01-29 1988-06-28 Allied Colloids Limited Production of paper and paperboard
WO1991007543A1 (fr) * 1989-11-09 1991-05-30 Eka Nobel Ab Procede de fabrication du papier
US5185206A (en) * 1988-09-16 1993-02-09 E. I. Du Pont De Nemours And Company Polysilicate microgels as retention/drainage aids in papermaking
WO1996013525A1 (fr) * 1994-10-29 1996-05-09 Basf Aktiengesellschaft Procede de modification cationique d'amidon et utilisation d'amidon cationiquement modifie
WO1998031740A1 (fr) * 1997-01-17 1998-07-23 Basf Aktiengesellschaft Amidon modifie avec un polymere, son procede de production et son utilisation
WO1998031711A1 (fr) * 1997-01-17 1998-07-23 Basf Aktiengesellschaft Amidon anionique modifie avec un polymere, son procede de production et son utilisation
WO1999023156A1 (fr) * 1997-10-30 1999-05-14 E.I. Du Pont De Nemours And Company Amidon de composition modifiee pour extraire des particules de dispersions aqueuses

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GB9123683D0 (en) * 1991-11-07 1992-01-02 Sandoz Ltd Improvements in or relating to organic compounds
JPH09291103A (ja) * 1996-04-25 1997-11-11 Sanwa Kosan Kk 製紙用澱粉

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097427A (en) * 1977-02-14 1978-06-27 Nalco Chemical Company Cationization of starch utilizing alkali metal hydroxide, cationic water-soluble polymer and oxidant for improved wet end strength
FR2396831A1 (fr) * 1977-07-04 1979-02-02 Scholten Honig Research Nv Perfectionnement aux charges minerales utilisees dans la fabrication du papier et du carton
US4388150A (en) * 1980-05-28 1983-06-14 Eka Aktiebolag Papermaking and products made thereby
US4753710A (en) * 1986-01-29 1988-06-28 Allied Colloids Limited Production of paper and paperboard
US5185206A (en) * 1988-09-16 1993-02-09 E. I. Du Pont De Nemours And Company Polysilicate microgels as retention/drainage aids in papermaking
WO1991007543A1 (fr) * 1989-11-09 1991-05-30 Eka Nobel Ab Procede de fabrication du papier
WO1996013525A1 (fr) * 1994-10-29 1996-05-09 Basf Aktiengesellschaft Procede de modification cationique d'amidon et utilisation d'amidon cationiquement modifie
WO1998031740A1 (fr) * 1997-01-17 1998-07-23 Basf Aktiengesellschaft Amidon modifie avec un polymere, son procede de production et son utilisation
WO1998031711A1 (fr) * 1997-01-17 1998-07-23 Basf Aktiengesellschaft Amidon anionique modifie avec un polymere, son procede de production et son utilisation
WO1999023156A1 (fr) * 1997-10-30 1999-05-14 E.I. Du Pont De Nemours And Company Amidon de composition modifiee pour extraire des particules de dispersions aqueuses

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176254A1 (fr) * 2000-07-24 2002-01-30 The Dow Chemical Company Utilisation de dispersions d'amidon reticulé dans la fabrication du papier
WO2002008516A1 (fr) * 2000-07-24 2002-01-31 Ecosynthetix Inc. Utilisation de dispersions d'amidon cationique reticule dans la fabrication de papier
US7160420B2 (en) 2000-07-24 2007-01-09 Ecosynthetix Inc. Use of dispersions of crosslinked cationic starch in papermaking
EP2273008A3 (fr) * 2000-07-24 2012-01-25 Ecosynthetix Inc. Utilisation de dispersions d'amidon reticulé dans la fabrication du papier
EP1303667B2 (fr) † 2000-07-24 2018-08-22 Ecosynthetix Ltd. Utilisation de dispersions d'amidon cationique reticule dans la fabrication de papier

Also Published As

Publication number Publication date
JP2002520510A (ja) 2002-07-09
ATE226663T1 (de) 2002-11-15
CN1309737A (zh) 2001-08-22
AU5283599A (en) 2000-02-07
DE19832241A1 (de) 2000-01-27
NO20010286L (no) 2001-01-17
DE59903194D1 (de) 2002-11-28
BR9912832A (pt) 2001-05-02
CA2336660A1 (fr) 2000-01-27
EP1102894A1 (fr) 2001-05-30
EP1102894B1 (fr) 2002-10-23
NO20010286D0 (no) 2001-01-17

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