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WO2001094699A1 - Procede de fabrication de papier - Google Patents

Procede de fabrication de papier Download PDF

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Publication number
WO2001094699A1
WO2001094699A1 PCT/US2000/015111 US0015111W WO0194699A1 WO 2001094699 A1 WO2001094699 A1 WO 2001094699A1 US 0015111 W US0015111 W US 0015111W WO 0194699 A1 WO0194699 A1 WO 0194699A1
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WO
WIPO (PCT)
Prior art keywords
starch
cationic
combination
phosphate
paper
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.)
Ceased
Application number
PCT/US2000/015111
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English (en)
Inventor
Walter Maliczyszyn
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.)
National Starch and Chemical Investment Holding Corp
Original Assignee
National Starch and Chemical Investment Holding Corp
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 National Starch and Chemical Investment Holding Corp filed Critical National Starch and Chemical Investment Holding Corp
Priority to PCT/US2000/015111 priority Critical patent/WO2001094699A1/fr
Priority to AU2000255927A priority patent/AU2000255927A1/en
Publication of WO2001094699A1 publication Critical patent/WO2001094699A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
    • D21H17/72—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00—Preparation of derivatives of starch
    • C08B31/02—Esters
    • C08B31/06—Esters of inorganic acids
    • C08B31/066—Starch phosphates, e.g. phosphorylated starch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00—Preparation of derivatives of starch
    • C08B31/08—Ethers
    • C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
    • C08B31/125—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch having a substituent containing at least one nitrogen atom, e.g. cationic starch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/04—Starch derivatives, e.g. crosslinked derivatives
    • C08L3/06—Esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/04—Starch derivatives, e.g. crosslinked derivatives
    • C08L3/08—Ethers
    • 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
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D21H17/29—Starch cationic
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/06—Controlling the addition
    • D21H23/08—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH
    • D21H23/10—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH at least two kinds of compounds being added

Definitions

  • This invention relates to an improved process of papermaking wherein polymer combinations of cationic and anionic starches having a select zeta potential are added to the stock or furnish in the wet end to provide improved retention as well as drainage and strength properties.
  • paper includes sheet-like masses and molded products made from fibrous cellulosic material, which may be derived from natural sources, synthetics such as polyamides, polyesters, rayon and polyacrylic resins as well as from mineral fibers such as asbestos and glass. In addition, paper made from combinations of cellulosic and synthetic materials are applicable herein. Paperboard is also included within the broad term “paper”.
  • Papermaking is a process of introducing an aqueous slurry of pulp or wood cellulosic fibers (which have been beaten or refined to achieve a level of fiber hydration and to which a variety of functional additives can be added) onto a screen or similar device in such a manner that the water is removed, thereby forming a sheet of the consolidated fibers, which upon pressing and drying can be processed into dry roll or sheet form.
  • Two well known papermaking processes involve the Fourdrinier machine, the most common, and the cylinder machine.
  • the feed or inlet to the machine is an aqueous slurry or water suspension of pulp fibers which is provided from what is called the "wet end" system.
  • the pulp along with other additives are mixed in an aqueous slurry and subject to mechanical and other operations such as beating and refining to improve interfiber bonding and other physical properties of the finished sheet.
  • Additives commonly introduced along with the pulp fibers are pigments such as titanium dioxide, mineral fillers such as clay and calcium carbonate and other materials introduced into paper to achieve such properties as improved brightness, opacity, smoothness, ink receptivity, fire retardance, water resistance, increased bulk, etc.
  • Starch has been used in the paper industry for many years and, in fact, is the second largest volume raw material component in paper. Starches perform a number of functions in papermaking including strength improvement, increased drainage and increased retention of fibers, fines and other components on the wire. Both unmodified and modified types have been used.
  • this invention involves the process of making paper comprising adding to the paper stock or furnish prior to or during formation of the sheet, a combination of cationic starch and starch phosphate, the combination having a zeta potential of from about +20 to -18 mV (millivolts).
  • This invention involves a combination of modified cationic starches and starch phosphates in amounts to provide a selected zeta potential range for use in papermaking.
  • the modified starches which are used in this invention can be prepared by methods known and described in the art. Cationization of the starch can be produced by well known chemical reactions with reagents containing amino, imino, ammonium, sulfonium and phosphonium groups as disclosed, for example, in "Cationic Starches” by D. B. Solarek, Modified Starches: Properties and Uses. Chapter 8, pp. 113-129, 1986, and in U.S. Patent No. 4,119,487 issued October 10, 1978 to M. Tessler.
  • Such cationic derivatives include those containing nitrogen groups comprising primary, secondary, tertiary and quaternary amines and sulfonium and phosphonium groups attached through either ether or ester linkages.
  • the preferred derivatives are those containing the tertiary amino and quaternary ammonium ether groups.
  • the general method for preparing starches containing tertiary amine groups which method involves reacting starch under alkaline conditions with a dialkylaminoalkyl halide is described in U.S. Patent No. 2,813,093 issued on November 12, 1957 to C. Caldwell, et al. Another method, therefore, is disclosed in U.S. Patent No. 4,675,394 issued January 23, 1987 to D. Solarek et al.
  • the primary and secondary amine starches may be prepared by reacting the starch with aminoalkyl anhydrides, amino epoxides or halides, or the corresponding compounds containing aryl in addition to the alkyl groups.
  • Quaternary ammonium groups may be introduced into the starch by suitable treatment of the tertiary aminoalkyl ether or starch, as described in the previously noted U.S. Patent No. 2,813,093.
  • quaternary groups may be introduced directly into the starch by treatment with the reaction product of an epihalohydrin and a tertiary amine or tertiary amine salt, to provide, for example, (3-timethylammonium chloride)-2-hydroxypropyl ether substituent groups as disclosed in the noted U.S. Patent No, 4,119,487.
  • the above noted patents, i.e., '487, '093 and '394 are incorporated herein by reference.
  • the preparation of cationic sulfonium derivatives is described in U.S.
  • the preparation of cationic phosphonium derivatives is disclosed in U.S. Patent No. 3,077,469 issued February 12, 1963 to A. Aszalos and involves reaction of starch in an aqueous alkaline medium with a beta-halogenoalkylphosphonium salt.
  • Suitable cationic starches may be provided using reagents and methods that are well known in the art as illustrated in the above references. Further description of useful cationic starches are disclosed in U.S. Patent No. 2,876,217 issued March 3, 1959 to E. Paschall, U.S. Patent No. 2,970,140 issued January 31 , 1961 to C. Hullinger et al., U.S. Patent No. 5,004,808 Issued April 2, 1991 to M. Yalpani et al., U.S. Patent No. 5,093,159 issued March 3, 1992 to J. Fernandez et al., and EP 406 837 published January 1 , 1991 (corresponding to U.S. Application Serial No.
  • Particularly useful cationic derivatives are those containing amino or nitrogen groups having alkyl, aryl, aralkyl or cyclic substituents of up to 18 carbon atoms and especially alkyl of 1 to 6 carbon atoms.
  • the amount of cationic substituent on the starch can be varied and generally a degree of substitution (DS) of from about 0.003 to 0.2 and preferably from about 0.01 to 0.1 will be used. While larger amounts of cationic substituents or higher degrees of substitution (DS) could be used, they are more costly and difficult to make and therefore not economically attractive.
  • degree of substitution DS as used herein means the average number of sites or substituent groups per anhydroglucose unit of the starch molecule.
  • the anionic starch used in this invention is a starch phosphate monoester.
  • the starch phosphate can be prepared by phosphorylation using any known method including the reaction with various inorganic phosphate salts. The preparation of starch phosphate monoesters using such methods are described in "Phosphorylated Starches and Miscellaneous Inorganic Esters" by D. B. Solarek, Modified Starches: Properties and Uses. Chapter 7, pp. 97-112, 1986. Phosphate groups are introduced into starch by thermal reaction with water-soluble ortho-, pyro-, meta-, or tripolyphosphates. Techniques for phosphorylating a starch base are further described in U.S. Patent Nos. 2,824,870 issued February 25, 1959 to H.
  • the starch is filtered without washing and adjusted to a moisture level of about 20% or below, preferably from about 5 to 20% by weight at a temperature of less than about 70°C.
  • the starch phosphate composition is then heated at a temperature of 100 to 160°C until the product has the desired level of anionic phosphate groups.
  • starch is phosphorylated by an improved pollution-free process which involves forming a concentrated reagent solution of alkali metal tripolyphosphate salt and impregnating therewith a starch cake containing no more than 45% by weight of moisture. Drying and thermally reacting the thus impregnated starch provides the phosphorylated starch.
  • one or more acids are added to control the pH at between 2.8 and 5.0.
  • any phosphate containing starch, native or modified may be used.
  • the phosphorylation may be carried out by any of the known techniques with the thermal reaction of the phosphate impregnated starch being performed at a pH between 5.5 and 8.5, and preferably 6.0 to 8.5.
  • the reaction of starch is carried out with sodium or potassium tripolyphosphate, sodium or potassium hexametaphosphate and sodium or potassium pyrophosphate salts yielding orthophosphate mono-ester groups, i.e., mono-starch phosphates.
  • Other alkali metal salts may be used in place of sodium or potassium which are preferred as the phosphorylating reagent.
  • the pH of the starch slurry containing the phosphorylating reagent is adjusted to about 5.5 to 8.5.
  • Use of pH levels below about 5.5 will result in a degraded starch while use of pH levels above about 8.5 may produce undesirable crosslinking.
  • phosphorylation is to be carried out by spraying the reagent, a starch slurry is ordinarily prepared and adjusted to be within the designated pH range and is then filtered. The reagent is sprayed onto the pH adjusted starch cake.
  • the filter cake at a slightly alkaline pH and impregnate it with an acidic solution of phosphate reagent such that the final pH of the starch-phosphate reagent mixture is within the defined pH range.
  • the specific reagent used may require adjustments of pH levels.
  • sodium tripolyphosphate (STP) has limited solubility in water (0.2 g/cc at 25°C).
  • the pH is maintained at 4.0 to 6.0 by addition of acid such as HCI or H 3 P0 during dissolution of the salt.
  • Suitable starch phosphate for this invention will include about 0.03 to 1.0% bound phosphorus, preferably about 0.1 to 0.3%.
  • bound phosphorus we mean phosphorus which is attached by an ester linkage to a hydroxyl group of the anhydroglucose backbone of the derivatized starch.
  • the amount of phosphorylating reagent employed will range from about 0.5 to 12% by weight of dry starch.
  • treatment of waxy maize with 3.5 to 4.0% of sodium tripolyphosphate will give a starch containing 0.14 to 0.22% of bound phosphorus.
  • the starch cake containing the phosphorylating reagent is dried to a moisture less than about 9.0% and preferably from about 2.0 to 7.0% prior to the required thermal treatment at higher temperatures.
  • the dry mixture of starch and phosphorylating reagent is heated to temperatures of from about 110° to 140°C and preferably will range from about 130° to 135°C during the phosphorylation reaction. The heating period may range from 0.1 to 4 hours or more depending on the selected reagent, pH, temperature, etc.
  • the starch which may be used as the base material in preparing the modified cationic starch and anionic starch materials of this invention may be derived from any plant source including corn, potato, sweet potato, wheat, rice, waxy rice, tapioca, waxy maize, sago, sorghum, high amylose starch such as amylose corn having 40% or more of amylose content, etc.
  • Starch flours may also be used.
  • the starch base may be a granular starch or a gelatinized starch, i.e., non-granular starch. It is further noted that the starch base material may be the same or different for each of the cationic starch or anionic starch components.
  • the essential feature of this invention is that the respective combinations of the two components are provided in proportions such that the net zeta potential of the starch combination will be in the range of from about +20 to -18 mV and preferably from about +15 to -5 mV. Keeping the zeta potential within this range is important because when using the starch combination in a papermaking process, significant improvement is seen in filler retention as well as good drainage and strength properties.
  • the starch combination When the papermaking process employing the cationic starch and anionic starch phosphate combination in accordance with this invention involves an alkaline papermaking system, i.e., where the pH of the system is typically greater than about 6.5, the starch combination will more particularly have a zeta potential of from about +18 to -18 mV and preferably from about +15 to -10 mV.
  • the cationic starch/anionic starch phosphate combination When the papermaking process involves an acid papermaking system, i.e., pH of less than about 6.5, the cationic starch/anionic starch phosphate combination will have a zeta potential of from about +20 to +1 mV and preferably from about +17 to +5 mV.
  • the proportion or ratio of cationic starch and starch phosphate components in the starch combination of this invention can vary to a wide degree provided that the zeta potential range, as described herein, is satisfied. More particularly, the cationic starch and starch phosphate polymer components are generally provided in amounts of from about 4:1 to 1 :4 parts by weight of cationic starch to starch phosphate.
  • zeta potential refers to electrokinetic potential, the potential across the interface of solids and liquids and more particularly the potential across the diffuse layer of ions surrounding a charge colloidal particle. Zeta potential relates to surface charge and electrophoretic mobility and is a well known property measurement.
  • zeta potential can readily be measured by the technique of microelectrophoresis.
  • the combination of cationic starch and starch phosphate may be effectively used for addition to pulp prepared from any type of cellulosic fibers, synthetic fibers, or combinations thereof.
  • cellulosic materials which may be used are bleached and unbleached sulfate (kraft), bleached and unbleached sulfite, bleached and unbleached soda, neutral sulfite, semi- chemical, chemiground wood, ground wood or any combination of these fibers.
  • Fibers of the viscose rayon or regenerated cellulose type may also be used if desired. Any desired inert mineral fillers may be added to the pulp which is to be modified with the improved starch derivatives of this invention.
  • Such materials include clay, titanium dioxide, talc, calcium carbonate, calcium sulfate and diatomaceous earths.
  • Other additives commonly introduced into paper may be added to the pulp or furnish, for example, dyes, pigments, sizing additives, alum, anionic retention aids, etc..
  • the amount of cationic starch and starch phosphate polymer combination (i.e. the total amount of both the cationic starch and starch phosphate components) that may be added to the wet end or paper pulp will be an effective additive amount, especially effective to improve filler retention. More particularly, from about 0.05 to 10% of the starch combination and preferably from about 0.1 to 2% by weight, based on the dry weight of the furnish, may be used.
  • the starch combinations is made as a component, i.e. the cationic starch and starch phosphate are combined together as one component to form the starch polymer combination.
  • These starch materials or combination have to be dispersed or solubilized prior to addition to the papermaking system. This may be accomplished by standard or known techniques such as batch cooking, jet cooking or steam injection cooking.
  • the starch components can either be cooked together as a blend or cooked separately, then blended and combined together and added as one component to the papermaking system.
  • colloidal inorganic minerals may be added to the system to form an alkaline microparticle system.
  • microparticle systems include colloidal silica, bentonite and anionic alum and may be incorporated into the system in amounts of at least 0.001 % and more particularly from about 0.01 to 1 % by weight based on the weight of dry pulp. Further description of such microparticle inorganic materials may be found In U.S. Patent No. 4,388,150 issued June 14, 1983; U.S. Patent No. 4,643,801 issued February 17, 1987; U.S. Patent No. 4,753,710 issued June 28, 1988 and U.S. Patent No. 4,913,775 issued April 3, 1990; all of which are incorporated herein by reference. The following examples will further illustrate the embodiments of this invention. In these examples all parts are given by weight and all temperatures in degrees Celsius unless otherwise noted.
  • An anionic starch phosphate was prepared as follows. Waxy maize (400 g) with pH adjusted to 8.5 was placed in a Hobart mixer and impregnated with an aqueous solution of sodium tripolyphosphate (STP) (9.5, g STP, 25.8 g H 2 0) to provide a treatment level of 2.3%. The pH of the resulting slurry was adjusted to 5.3 with the slow addition of HCI to get complete dissolution. The STP solution was applied to the starch via a manual spray bottle over about 5 minutes. After STP addition was complete, mixing was continued for 10 minutes. The resulting impregnated starch was dried at 60°C to 4% moisture in a forced air oven.
  • STP sodium tripolyphosphate
  • the resulting material was ground to a fine powder, spread as a thin layer on a tray, and heated to 155°C for 30 minutes in a forced air oven.
  • the amount of bound phosphorus in the product was determined by washing the sample with a 5% aqueous solution of ethylenediamine tetraacetic acid (EDTA) followed by rinsing with distilled water and measuring the phosphorus by inductively couple plasma (ICP) after acid dissolution of the starch.
  • ICP inductively couple plasma
  • zeta potential charges mV
  • the zeta potentials were determined using a Zetasizer 2000 instrument obtained from the Malvern Instruments Limited. Using this instrument, which involves a microelectrophoresis technique, and the procedure recommended by the manufacturer, zeta potential measurements were made for the various combinations.
  • Sample combinations were prepared by dispersing 1 g of the selected starch combination in distilled water in a 150 ml Pyrex beaker. The dispersed combination was cooked in boiling water for 30 minutes, with stirring for the first 5 minutes. The combination was diluted to 0.1 % with distilled water and cooled to room temperature. Samples of the starch combination solutions (20 cc) were injected into the instrument set at 25°C, and the average of three zeta potential readings recorded.
  • a standard papermaking furnish was prepared using a pulp stock which comprised an aqueous slurry of bleached hardwood kraft pulp (BHWK) and bleached softwood kraft pulp (BSWK).
  • the pulp stock 80:20 BHWK:BSWK, parts by weight
  • the pulp stock was refined in a standard laboratory Valley beater to about 400 CSF (Canadian Standard Freeness) and a pH of 7.8 to 8.2 and contained precipitated calcium carbonate filler (30% db) with 8 to 10% fiber fines and total fines of 37 to 42%.
  • Example 2 For comparative purposes, sample combinations of cationic starch and starch phosphates as prepared in Example I and having zeta potential within the preferred ranges were evaluated for calcium carbonate retention and compared with an amphoteric waxy starch material (0.25% cationic N content, 0.12% bound P content) and a cationic waxy starch (0.33% N quat). Results are reported in Table 2 below.
  • Example 1 with the individual starches cooked separately and then combinded together before adding to the papermaking system.
  • Starch combinations were evaluated as a 50/50, weight/weight (w/w) sample for CaC0 3 retention in an alkaline papermaking system. Results are compared with an amphoteric starch and a cationic starch (all starches are the same as in Example 1) and given below in Table 4. These results show the improved retention properties for the starch combinations of this invention when compared to either the amphoteric or cationic starches.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
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  • Inorganic Chemistry (AREA)
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Abstract

L'invention concerne un papier présentant des propriétés de rétention améliorées, obtenu par addition au système de fabrication de papier d'une combinaison d'amidon cationique et de phosphate d'amidon, sous forme d'un mélange, cette combinaison présentant un potentiel électrocinétique net sélectionné entre +20 et 18 mV environ.
PCT/US2000/015111 2000-06-02 2000-06-02 Procede de fabrication de papier Ceased WO2001094699A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2000/015111 WO2001094699A1 (fr) 2000-06-02 2000-06-02 Procede de fabrication de papier
AU2000255927A AU2000255927A1 (en) 2000-06-02 2000-06-02 A method of making paper

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Application Number Priority Date Filing Date Title
PCT/US2000/015111 WO2001094699A1 (fr) 2000-06-02 2000-06-02 Procede de fabrication de papier

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WO2001094699A1 true WO2001094699A1 (fr) 2001-12-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812669A1 (fr) * 2000-08-07 2002-02-08 Nat Starch Chem Invest Procede pour la production de papier, utilisant des associations de polymeres d'amidon
FR2923832A1 (fr) * 2007-11-20 2009-05-22 Roquette Freres Composition anionique aqueuse contenant au moins un amidon anionique gelatinise, soluble et, de preference, un amidon anionique insoluble, non gelatinise ou partiellement gonfle.
US8377260B2 (en) 2003-03-25 2013-02-19 Nippon Paper Industries Co., Ltd. Newsprint paper for offset printing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459632A (en) * 1965-11-17 1969-08-05 Nat Starch Chem Corp Method of making paper containing starch derivatives having both anionic and cationic groups,and the product produced thereby
JPS6163796A (ja) * 1984-09-04 1986-04-01 本州製紙株式会社 紙の製造方法
US5129989A (en) * 1987-03-13 1992-07-14 Roquette Freres Manufacturing process for paper
JPH06173193A (ja) * 1992-10-22 1994-06-21 Nippon Shokuhin Kako Co Ltd 製紙方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459632A (en) * 1965-11-17 1969-08-05 Nat Starch Chem Corp Method of making paper containing starch derivatives having both anionic and cationic groups,and the product produced thereby
JPS6163796A (ja) * 1984-09-04 1986-04-01 本州製紙株式会社 紙の製造方法
US5129989A (en) * 1987-03-13 1992-07-14 Roquette Freres Manufacturing process for paper
JPH06173193A (ja) * 1992-10-22 1994-06-21 Nippon Shokuhin Kako Co Ltd 製紙方法

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DATABASE PAPERCHEM [online] THE INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY, ATLANTA, GA, US; WEIGL, J: "INFLUENCE OF ELECTROKINETIC CHARGING OF SOLID PARTICLES DURING DISPERSION AND FLOCCULATION PHENOMENA", XP002146139, retrieved from DIALOG *
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812669A1 (fr) * 2000-08-07 2002-02-08 Nat Starch Chem Invest Procede pour la production de papier, utilisant des associations de polymeres d'amidon
ES2187271A1 (es) * 2000-08-07 2003-05-16 Nat Starch Chem Invest Combinaciones de polimeros de almidon usados en la fabricacion de papel.
US8377260B2 (en) 2003-03-25 2013-02-19 Nippon Paper Industries Co., Ltd. Newsprint paper for offset printing
FR2923832A1 (fr) * 2007-11-20 2009-05-22 Roquette Freres Composition anionique aqueuse contenant au moins un amidon anionique gelatinise, soluble et, de preference, un amidon anionique insoluble, non gelatinise ou partiellement gonfle.
WO2009071796A1 (fr) * 2007-11-20 2009-06-11 Roquette Freres Composition aqueuse contenant au moins un amidon anionique gelatinise soluble
US8444820B2 (en) 2007-11-20 2013-05-21 Roquette Freres Aqueous composition containing at least one soluble gelatinized anionic starch

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