EP0282081A1 - Verfahren zur Erhöhung der Papierfestigkeit - Google Patents
Verfahren zur Erhöhung der Papierfestigkeit Download PDFInfo
- Publication number
- EP0282081A1 EP0282081A1 EP88103897A EP88103897A EP0282081A1 EP 0282081 A1 EP0282081 A1 EP 0282081A1 EP 88103897 A EP88103897 A EP 88103897A EP 88103897 A EP88103897 A EP 88103897A EP 0282081 A1 EP0282081 A1 EP 0282081A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mole
- units derived
- repeating units
- paper strength
- acid
- 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.)
- Withdrawn
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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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
- D21H17/43—Carboxyl groups or derivatives thereof
-
- 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
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
- D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
Definitions
- the present invention relates to a method for increasing paper strength comprising adding a certain paper strength agent to a pulp slurry during paper making. More particularly, it relates to a method for increasing paper strength comprising adding aluminum sulfate and a specific amphoteric copolymer as a paper strength agent to a pulp slurry.
- amphoteric copolymer an amphoteric water-soluble copolymer having a cationic functional group and an anionic functional group in one molecule
- amphoteric copolymer can very effectively increase paper strength and decreases pollution of wastewater, it is intensively studied.
- Japanese Patent Kokai Publication Nos. 30913/1979, 60095/1983, 91897/1983 and 94697/1985 disclose methods for increasing paper strength which uses amphoteric copolymers comprising acrylamide, an ⁇ , ⁇ -unsaturated carboxylic acid (e.g. acrylic acid) and dialkylaminoalkyl acrylate and the like.
- An object of the present invention is to provide a method for increasing paper strength which can overcome the drawbacks and problems of the conventional methods using the amphoteric copolymer together with aluminum sulfate.
- the present invention provides a method for increasing paper strength comprising adding aluminum sulfate and a paper strength-agent containing a copolymer comprising (a) 98 to 60 % by mole of repeating units derived from (meth)acrylamide, (b) 1 to 20 % by mole of repeating units derived from at least one compound selected from the group consisting of ⁇ , ⁇ -unsaturated monocarboxylic acids and their salts and ⁇ , ⁇ -unsaturated dicarboxylic acids and their salts and (c) 1 to 20 % by mole of repeating units derived from a diallylamine derivative of the formula: wherein R1 and R2 are the same or different and hydrogen or methyl, R3 and R4 are the same or different and hydrogen or C1-C6 alkyl, and X ⁇ is an anion of an organic acid or an inorganic acid as an effective component to a pulp slurry and then making a sheet of paper from said slurry.
- (meth)acrylamide (a) acrylamide or methacrylamide is used as such or as a mixture thereof. Industrially, acrylamide is preferred.
- Examples of the compound (b) are unsaturated monocarboxylic acids such as acrylic acid and methacrylic acid; unsaturated dicarboxylic acids such as maleic acid, fumaric acid and itaconic acid; and their alkali metal salts such as sodium salt and potassium salt or ammonium salt. A mixture of two or more of them may be used.
- diallylamine derivative (I) as the component (c) examples include organic or inorganic salts of secondary amines such as diallylamine and dimethallylamine; organic or inorganic salts of tertiary amines such as diallylmethylamine, diallylethylamine and diallylbutylamine; quarternary ammonium salts such as diallyldimethylammonium chloride, diallyldimethylammonium bromide, diallyldiethylammonium chloride, diallyldibutylammonium chloride and diallylmethylethylammmonium chloride. A mixture of two or more of them may be used.
- the amphoteric copolymer comprises 98 to 60 % by mole, preferably 96 to 70 % by mole of the (meth)acrylamide (a), 1 to 20 % by mole, preferably 2 to 15 % by mole of the compound (b) and 1 to 20 % by mole, preferably 2 to 15 % by mole of the diallylamine derivative (I) as the component (c).
- the amphoteric copolymer may comprise units derived from a comonomer which is copolymerizable with the three components (a), (b) and (c) in such an amount that the paper strength-increasing effect and water-solubility of the amphoteric copolymer are not deteriorated.
- nonionic monomers such as (meth)acrylonitrile, methyl (meth)acrylate, hydroxyethyl (meth)acrylate, styrene and vinyl acetate; cationic monomers such as dimethylaminoethyl (meth)acrylate, dimethylaminopropyl(meth)acrylamide and their quarternary derivatives; and bifunctional monomers such as ethyleneglycol di(meth)acrylate and methylene bis(meth)acrylamide; and the like.
- amphoteric copolymer used according to the present invention can be prepared by copolymerizing these essential components and the optional components by any of conventional polymerization methods.
- the monomer components are copolymerized in water or a mixture of water and a water-soluble organic solvent in the presence of a polymerization initiator.
- any of conventional ones may be used.
- examples of such initiator are persulfates such as ammonium persulfate and potassium persulfate; azo compounds such as 2,2-diamidinyl-2,2-azopropane dihydrochloric acid and azobisisobutyronitrile; peroxides such as di-ter.-butylperoxide, cumene hydroperoxide and hydrogen peroxide; and the like.
- a known redox initiator such as a combination of potassium persulfate and sodium hydrogen sulfite or a tertiary amine can be used.
- a conventionally used chain transfer agent such as isopropanol and allylalcohol may be used.
- the polymerization is carried out at a temperature of from 10 to 100°C, preferably from 40 to 90°C for 1 to 20 hours.
- the polymerization may be carried out in the presence of oxygen, it is preferably carried out in an atmosphere of an inert gas such as nitrogen.
- the essential and optional monomer components may be added to a polymerization system all at once and then copolymerized, or one or more components are firstly added to the polymerization system and thereafter the rest of the components is added to the polymerization system continuously or by portions.
- amphoteric copolymers prepared as above those having a viscosity of 10 to 1,000 poise, particularly 30 to 300 poise (in a 15 % by weight aqueous solution) at 25°C are preferred.
- the viscosity of the amphoteric copolymer will influence the effects of the paper strength. When the viscosity is too small, such effect is decreased, and when it is too high, texture of paper is worsened. Therefore, the amphoteric copolymer having a viscosity outside the range of from 10 to 1,000 poise are less preferred.
- Aluminum sulfate to be used according to the present invention is usually called as "Alum” and Al2(SO4)3 having 16 to 18 molecules of crystal water per molecule.
- paper is made by a per se conventional method which uses aluminum sulfate. Namely, to an aqueous dispersion of pulp, the paper strength agent of the present invention is added in an amount of 0.05 to 3 % by weight based on a dry weight of pulp and a sheet of paper is made from the slurry in the presence of aluminum sulfate.
- the amount of aluminum sulfate to be added is from 0.05 to 5 % by weight, preferably from 0.1 to 4 % by weight, more preferably from 0.2 to 1.5 % by weight based on the dry weight of pulp.
- the paper slurry may contain a conventional internal sizing agent and/or a filler such as clay, talc and titanium oxide.
- diallylamine (2.9 g) as a component (c) was charged together with 36 % hydrochloric acid (3.0 g) and deionized water (178.2 g). pH of the mixture was adjusted to 4.5 with a 28 % aqueous solution of sodium hydroxide and air in the flask was purged by introducing nitrogen therein.
- the interior temperature was raised to 70°C and ammonium persulfate (0.45 g) was added. Thereafter, a mixture of a 50 % aqueous solution of acrylamide as a component (a) (61.8 g) and a 80 % aqueous solution of acrylic acid as a component (b) (3.2 g) was dropwise added over 2 hours while keeping the interior temperature at 70°C. After completion of the addition of the mixture, the content in the flask was kept at 70°C for 4 hours.
- amphoteric copolymer prepared in the same manner as in Example 1 but using the components (a), (b) and (c) in amounts shown in Table 1, a amphoteric copolymer was prepared. Properties of the amphoteric copolymers (Amphoteric copolymers B to J) prepared in Preparation Examples 2 to 10 are also shown in Table 1.
- the mixture was heated to 55°C, and then a mixture of ammonium persulfate (0.10 g) and sodium hydrogen sulfite (0.04 g) as polymerization initiators were added to the mixture. The resulting mixture was heated to 90°C over 60 minutes and kept at that temperature for 4 hours.
- a sheet of paper was made by Tappi standard type hand paper making machine, dehydrated and pressed followed by drying at 110°C for 4 minutes to produce a sheet of hand made paper of 125 ⁇ 2 g/m2 of basis weight.
- Bursting factor [(bursting strength/basis weight) ⁇ 100] and ring crush factor [(ring crush strength/basis weight) ⁇ 100] of each sheet of paper were measured according to JIS P-8112 and P-8126, respectively. The results are shown in Table 2.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5738787 | 1987-03-12 | ||
JP57387/87 | 1987-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0282081A1 true EP0282081A1 (de) | 1988-09-14 |
Family
ID=13054201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88103897A Withdrawn EP0282081A1 (de) | 1987-03-12 | 1988-03-11 | Verfahren zur Erhöhung der Papierfestigkeit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0282081A1 (de) |
AU (1) | AU1302988A (de) |
FI (1) | FI881146A (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0735186A2 (de) * | 1995-03-30 | 1996-10-02 | Japan Pmc Corporation | Zusatzstoff für die Papierherstellung und Verfahren zur Herstellung von Papier |
US5853542A (en) * | 1995-09-11 | 1998-12-29 | Hercules Incorporated | Method of sizing paper using a sizing agent and a polymeric enhancer and paper produced thereof |
US7112639B2 (en) | 2000-04-01 | 2006-09-26 | Qinetiq Limited | Polymers |
US20130092092A1 (en) * | 2010-06-25 | 2013-04-18 | Uni-Charm Corporation | Liquid-permeable panel and system toilet for animals using same |
US8530597B2 (en) | 2005-05-03 | 2013-09-10 | Nalco Company | High molecular weight compact structured polymers, methods of making and using |
WO2014117964A1 (en) * | 2013-01-31 | 2014-08-07 | Glatfelter Gernsbach Gmbh & Co. Kg | Crosslinking/functionalization system for a paper or non-woven web |
US9995001B2 (en) | 2014-12-08 | 2018-06-12 | Harima Chemicals, Incorporated | Acrylamide-based polymer, paper strength agent, and paper |
US10240295B2 (en) | 2016-05-30 | 2019-03-26 | Harima Chemicals, Inc. | Pitch-controlling agent and pitch-controlling method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3874994A (en) * | 1971-12-23 | 1975-04-01 | American Cyanamid Co | Process of making paper where an ionic vinylamide polymer latex is added to the furnish to improve dry strength of the paper |
US4077930A (en) * | 1974-07-16 | 1978-03-07 | Calgon Corporation | Self-inverting emulsions of dialkyldiallyl ammonium chloride polymers and copolymers |
US4305860A (en) * | 1980-08-21 | 1981-12-15 | National Starch And Chemical Corporation | Stable, pumpable, solvent-free colloidal polyampholyte latices, their preparation and use in paper |
EP0058622A1 (de) * | 1981-02-17 | 1982-08-25 | Calgon Corporation | Herabsetzung der Ablagerung von klebrigen Harzen während der Papierherstellung |
-
1988
- 1988-03-11 AU AU13029/88A patent/AU1302988A/en not_active Abandoned
- 1988-03-11 FI FI881146A patent/FI881146A/fi not_active IP Right Cessation
- 1988-03-11 EP EP88103897A patent/EP0282081A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3874994A (en) * | 1971-12-23 | 1975-04-01 | American Cyanamid Co | Process of making paper where an ionic vinylamide polymer latex is added to the furnish to improve dry strength of the paper |
US4077930A (en) * | 1974-07-16 | 1978-03-07 | Calgon Corporation | Self-inverting emulsions of dialkyldiallyl ammonium chloride polymers and copolymers |
US4305860A (en) * | 1980-08-21 | 1981-12-15 | National Starch And Chemical Corporation | Stable, pumpable, solvent-free colloidal polyampholyte latices, their preparation and use in paper |
EP0058622A1 (de) * | 1981-02-17 | 1982-08-25 | Calgon Corporation | Herabsetzung der Ablagerung von klebrigen Harzen während der Papierherstellung |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, vol. 91, no. 8, 20th August 1979, page 118, no. 59103t, Columbus, Ohio, US; & JP-A-54 030 913 (ARAKAWA CHEMICAL INDUSTRIES LTD) 07-03-1979 (Cat. D) * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0735186A2 (de) * | 1995-03-30 | 1996-10-02 | Japan Pmc Corporation | Zusatzstoff für die Papierherstellung und Verfahren zur Herstellung von Papier |
EP0735186A3 (de) * | 1995-03-30 | 1998-02-18 | Japan Pmc Corporation | Zusatzstoff für die Papierherstellung und Verfahren zur Herstellung von Papier |
US5853542A (en) * | 1995-09-11 | 1998-12-29 | Hercules Incorporated | Method of sizing paper using a sizing agent and a polymeric enhancer and paper produced thereof |
US7112639B2 (en) | 2000-04-01 | 2006-09-26 | Qinetiq Limited | Polymers |
US8530597B2 (en) | 2005-05-03 | 2013-09-10 | Nalco Company | High molecular weight compact structured polymers, methods of making and using |
US20130092092A1 (en) * | 2010-06-25 | 2013-04-18 | Uni-Charm Corporation | Liquid-permeable panel and system toilet for animals using same |
WO2014117964A1 (en) * | 2013-01-31 | 2014-08-07 | Glatfelter Gernsbach Gmbh & Co. Kg | Crosslinking/functionalization system for a paper or non-woven web |
CN104822870A (zh) * | 2013-01-31 | 2015-08-05 | 格拉特菲尔特盖恩斯巴赫股份有限公司 | 用于纸或非织造网的交联/功能化系统 |
CN104822870B (zh) * | 2013-01-31 | 2017-10-27 | 格拉特菲尔特盖恩斯巴赫股份有限公司 | 用于纸或非织造网的交联/功能化系统 |
US10240294B2 (en) | 2013-01-31 | 2019-03-26 | Glatfelter Gernsbach Gmbh | Crosslinking/functionalization system for a paper or non-woven web |
US9995001B2 (en) | 2014-12-08 | 2018-06-12 | Harima Chemicals, Incorporated | Acrylamide-based polymer, paper strength agent, and paper |
US10240295B2 (en) | 2016-05-30 | 2019-03-26 | Harima Chemicals, Inc. | Pitch-controlling agent and pitch-controlling method |
EP3467202A4 (de) * | 2016-05-30 | 2019-08-14 | Harima Chemicals, Inc. | Pechkontrollmittel und pechkontrollverfahren |
Also Published As
Publication number | Publication date |
---|---|
FI881146A0 (fi) | 1988-03-11 |
AU1302988A (en) | 1988-09-15 |
FI881146A (fi) | 1988-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT SE |
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17P | Request for examination filed |
Effective date: 19890301 |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SUMITOMO CHEMICAL COMPANY, LIMITED |
|
17Q | First examination report despatched |
Effective date: 19901114 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19910326 |