EP0301372A1 - Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec - Google Patents
Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec Download PDFInfo
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- EP0301372A1 EP0301372A1 EP88111572A EP88111572A EP0301372A1 EP 0301372 A1 EP0301372 A1 EP 0301372A1 EP 88111572 A EP88111572 A EP 88111572A EP 88111572 A EP88111572 A EP 88111572A EP 0301372 A1 EP0301372 A1 EP 0301372A1
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- European Patent Office
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 229920002472 Starch Polymers 0.000 claims abstract description 43
- 235000019698 starch Nutrition 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 239000008107 starch Substances 0.000 claims abstract description 28
- 229920006317 cationic polymer Polymers 0.000 claims abstract description 22
- HXVJQEGYAYABRY-UHFFFAOYSA-N 1-ethenyl-4,5-dihydroimidazole Chemical class C=CN1CCN=C1 HXVJQEGYAYABRY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 13
- NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical compound NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000123 paper Substances 0.000 claims description 58
- 229920000642 polymer Polymers 0.000 claims description 39
- 239000007864 aqueous solution Substances 0.000 claims description 24
- 229920001577 copolymer Polymers 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- 229920001519 homopolymer Polymers 0.000 claims description 16
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- ZQXSMRAEXCEDJD-UHFFFAOYSA-N n-ethenylformamide Chemical compound C=CNC=O ZQXSMRAEXCEDJD-UHFFFAOYSA-N 0.000 claims description 13
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 9
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- VDSAXHBDVIUOGV-UHFFFAOYSA-N 1-ethenyl-2-methyl-4,5-dihydroimidazole Chemical compound CC1=NCCN1C=C VDSAXHBDVIUOGV-UHFFFAOYSA-N 0.000 claims description 6
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 claims description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 claims description 3
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims description 2
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 229920001592 potato starch Polymers 0.000 description 23
- 239000004848 polyfunctional curative Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 12
- 108090000790 Enzymes Proteins 0.000 description 10
- 102000004190 Enzymes Human genes 0.000 description 10
- 229940088598 enzyme Drugs 0.000 description 10
- 238000006116 polymerization reaction Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 239000003505 polymerization initiator Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000010812 mixed waste Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 240000000731 Fagus sylvatica Species 0.000 description 3
- 235000010099 Fagus sylvatica Nutrition 0.000 description 3
- 102000004139 alpha-Amylases Human genes 0.000 description 3
- 108090000637 alpha-Amylases Proteins 0.000 description 3
- 229940024171 alpha-amylase Drugs 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 240000006439 Aspergillus oryzae Species 0.000 description 2
- 235000002247 Aspergillus oryzae Nutrition 0.000 description 2
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 2
- 229940073608 benzyl chloride Drugs 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 2
- 230000007515 enzymatic degradation Effects 0.000 description 2
- 230000002255 enzymatic effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OZFIGURLAJSLIR-UHFFFAOYSA-N 1-ethenyl-2h-pyridine Chemical compound C=CN1CC=CC=C1 OZFIGURLAJSLIR-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 1
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 1
- 241000228245 Aspergillus niger Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229920002307 Dextran Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 108010073178 Glucan 1,4-alpha-Glucosidase Proteins 0.000 description 1
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001348 alkyl chlorides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 1
- 229940092714 benzenesulfonic acid Drugs 0.000 description 1
- AGEZXYOZHKGVCM-UHFFFAOYSA-N benzyl bromide Chemical compound BrCC1=CC=CC=C1 AGEZXYOZHKGVCM-UHFFFAOYSA-N 0.000 description 1
- 150000001649 bromium compounds Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920003118 cationic copolymer Polymers 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- DENRZWYUOJLTMF-UHFFFAOYSA-N diethyl sulfate Chemical compound CCOS(=O)(=O)OCC DENRZWYUOJLTMF-UHFFFAOYSA-N 0.000 description 1
- 229940008406 diethyl sulfate Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 238000010559 graft polymerization reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 229940050176 methyl chloride Drugs 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 235000019394 potassium persulphate Nutrition 0.000 description 1
- 229940116317 potato starch Drugs 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007717 redox polymerization reaction Methods 0.000 description 1
- 229940100486 rice starch Drugs 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- XUXNAKZDHHEHPC-UHFFFAOYSA-M sodium bromate Chemical compound [Na+].[O-]Br(=O)=O XUXNAKZDHHEHPC-UHFFFAOYSA-M 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
- 229940100445 wheat starch Drugs 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- 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
- D21H17/41—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
-
- 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
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
Definitions
- the graft polymerization is preferably carried out in the presence of a redox catalyst.
- a process for cationizing starch is known from US Pat. No. 4,097,427, in which the starch is boiled in an alkaline medium in the presence of water-soluble quaternary ammonium polymers and an oxidizing agent.
- Quaternary ammonium polymers include quaternized diallyldialkylamine polymers or quaternized polyethyleneimines are also suitable.
- the oxidizing agent used is, for example, ammonium persulfate, hydrogen peroxide, sodium hypochlorite, ozone or tert-butyl hydroperoxide.
- the modified cationic starches which can be prepared in this way are added to the paper stock as dry strength agents in the production of paper. However, the wastewater is polluted by a very high COD value.
- the invention has for its object to achieve an improvement in the dry strength of paper when using starch compared to the known methods.
- the substantivity of the starch is increased when it is drawn onto the fibers in the paper stock, thereby reducing the COD load in the wastewater.
- the mixtures to be used as dry strength agents according to the invention have good retention towards paper fibers in the paper stock.
- the COD value in the white water is significantly reduced with the mixtures to be used according to the invention compared to a native starch or an enzymatically digested one.
- the interfering substances contained in the water circuits of paper machines affect the effectiveness of the dry strength agents to be used according to the invention only slightly.
- the pH of the pulp suspensions can be in the range from 4 to 9, preferably 6 to 8.5.
- An essential component of the mixtures are enzymatically degraded starches.
- All native starches can be considered for the preparation of the mixtures, for example native potato starch, wheat starch, corn starch, rice starch and tapioca starch.
- the starches are broken down with the aid of enzymes, for example ⁇ -amylase from Aspergillus oryzae or from Bacillus lichemiformis or amyloglucosidase from Aspergillus niger, according to known methods, by first preparing an aqueous slurry of a native starch or a mixture of several native starches in water.
- the slurry is prepared by applying 0.1 to 60 parts by weight of starch to 100 parts by weight of water.
- starch slurries are then mixed, based on 100 parts by weight of the slurry, with 0.0001 to 1 part by weight of an enzyme customary for the degradation of native starch.
- the aqueous slurries of starch and enzyme are heated to temperatures of about 100 ° C. with thorough mixing.
- the starch is broken down enzymatically in the temperature range up to about 90 ° C.
- the degree of degradation of the native starch depends on the heating rate of the reaction batch, the residence time at a certain higher temperature and the amount of the enzyme used.
- the progress of the degradation of the native starch can easily be determined by taking samples from the batch and determining the viscosity of the samples. As soon as the desired degree of degradation of the starch is reached, the enzyme is deactivated.
- the simplest way to deactivate is to heat the reaction mixture to temperatures above 90 ° C., for example 92 to 98 ° C. At these temperatures, the enzymes lose their activity, so that the enzymatic breakdown then comes to a standstill.
- the aqueous solution of the enzymatically degraded starch thus obtained is then cooled, for example to 70 ° C. and, if appropriate after being diluted with water, mixed with the cationic polymers, the dry strength agent for the production of paper being obtained.
- the concentration of the enzymatically degraded starch in the aqueous solution, which is then combined with the is mixed cationic polymer is 40 to 0.5 wt .-%.
- the enzymatic degradation is carried out so far that aqueous solutions of enzymatically degraded starch with a viscosity of 20 to 2,000, preferably 25 to 1,500 mPa.s (measured in 7.5% aqueous solution at 45 ° C.) are obtained.
- the aqueous solution of the enzymatically degraded starches is then combined with the cationic polymers described above.
- the simplest way to do this is to mix the aqueous solution of the enzymatically degraded starches immediately after the enzymatic degradation with the cationic polymers in question in the form of an aqueous solution.
- the enzymatically degraded starch can be mixed with the cationic polymers at temperatures in the range from 15 to 170 ° C., the reaction being carried out in pressure-tight apparatus at temperatures above 100 ° C.
- the two components are preferably mixed in the temperature range from 40 to 100 ° C. in a period from 1 min to 60 min.
- the enzymatically degraded starch and the cationic polymers are mixed in all cases in the absence of oxidizing agents, initiators and alkali. Only homogeneous mixing is desirable. 1 to 20, preferably 5 to 15 parts by weight of at least one cationic polymer are used per 100 parts by weight of an enzymatically degraded starch or a mixture of enzymatically degraded starches. For example, a 25% by weight aqueous solution of the mixture of enzymatically degraded starch and cationic polymer to be used as a dry strength agent has a viscosity in the range from 10 to 10,000 mPa.s (measured according to Brookfield at 20 revolutions and 80 ° C.) .
- Cationic copolymers of group a) include, for example, polymers of diallyldimethylammonium chloride. Polymers of this type are known.
- Polymers of diallyldimethylammonium chloride should primarily be understood to mean the homopolymers and the copolymers with acrylamide and / or methacrylamide.
- the copolymerization can be carried out in any monomer ratio.
- the K value of the homopolymers and copolymers of diallyldimethylammonium chloride is at least 30, preferably 95 to 180.
- the substituent X ⁇ in the formulas I and II can in principle be any acid residue of an inorganic and an organic acid.
- the monomers of formula I are obtained by using the free base, i.e. 1-vinyl-2-imidazoline, neutralized with the equivalent amount of an acid.
- the vinylimidazolines can also be neutralized, for example, with trichloroacetic acid, benzenesulfonic acid or toluenesulfonic acid.
- quaternized 1-vinyl-2-imidazolines can also be used.
- quaternizing agents are, for example, C1 to C18 alkyl chlorides or bromides, benzyl chloride, benzyl bromide, epichlorohydrin, dimethyl sulfate and diethyl sulfate. Epichlorohydrin, benzyl chloride, dimethyl sulfate and methyl chloride are preferably used as quaternizing agents.
- the compounds of the formula I or II are preferably polymerized in an aqueous medium.
- the copolymers are obtained by polymerizing the monomers of the compound of the formulas I and II with acrylamide and / or methacrylamide.
- the monomer mixture used in the polymerization contains at least 1% by weight of a monomer of the formula I or II, preferably 10 to 40% by weight.
- Copolymers containing 60 to 85% by weight of acrylamide and / or methacrylamide and 15 to 40% by weight of N-vinylimidazoline or N-vinyl-2-methylimidazoline in copolymerized form are particularly suitable for the modification of enzymatically degraded starch.
- the copolymers can also by copolymerizing other monomers, such as styrene, vinyl acetate, vinyl propionate, N-vinylformamide, C1- to C4-alkyl vinyl ether, N-vinylpyridine, N-vinylpyrrolidone, N-vinylimidazole, acrylic acid esters, methacrylic acid esters, ethylenically unsaturated C3- to C5 -Carboxylic acids, sodium vinyl sulfonate, acrylonitrile, methacrylonitrile, vinyl chloride and vinylidene chloride can be modified in amounts up to 25% by weight.
- other monomers such as styrene, vinyl acetate, vinyl propionate, N-vinylformamide, C1- to C4-alkyl vinyl ether, N-vinylpyridine, N-vinylpyrrolidone, N-vinylimidazole, acrylic acid esters, methacrylic acid esters
- polymerization in aqueous solution it is possible, for example, to prepare the homopolymers and copolymers in a water-in-oil emulsion.
- the monomers can also be polymerized by the reverse suspension polymerization method, in which bead-like polymers are obtained.
- the polymerization is initiated with the aid of conventional polymerization initiators or by the action of high-energy radiation.
- Suitable polymerization initiators are, for example, hydrogen peroxide, inorganic and organic peroxides, and hydroperoxides and azo compounds. Mixtures of polymerization initiators can be used as well as so-called redox polymerization initiators, e.g.
- the polymerization is carried out at temperatures in the range from 0 to 100 ° C., preferably 15 to 80 ° C. It is of course also possible to polymerize at temperatures above 100 ° C., but it is then necessary to carry out the polymerization under pressure. For example, temperatures up to 150 ° C are possible.
- the reaction time depends on the temperature. The higher the temperature during the polymerization, the shorter the time required for the polymerization.
- the mixtures of the cationic polymers and enzymatically degraded starch to be used according to the invention are added to the paper stock in an amount of 0.5 to 5.0, preferably 1.5 to 3.5% by weight, based on dry paper stock.
- the pH of the mixture is 2.0 to 9.0, preferably 2.5 to 8.0.
- the solution of the dry strength agent in water at a solids concentration of 7.5% by weight has a viscosity of 20 to 10,000, preferably 30 to 4,000 mPas, measured in a Brookfield viscometer at 20 rpm and a temperature of 45 ° C.
- the dry strength agents to be used according to the invention can be used in the production of all known grades of paper, cardboard and cardboard, e.g. Writing, printing and packaging papers.
- the papers can be made from a variety of different types of fiber materials, for example from sulfite or sulfate pulp in the bleached or unbleached state, wood pulp, waste paper, thermomechanical material (TMP) and chemothermomechanical material (CTMP).
- TMP thermomechanical material
- CMP chemothermomechanical material
- the pH of the stock suspension is between 4.0 and 10, preferably between 6.0 and 8.5.
- the dry strength agents can be used both in the production of base paper for papers with low basis weight (LWC papers) and for cardboard.
- the basis weight of the papers is between 30 and 200, preferably 35 and 150 g / m2, while it can be up to 600 g / m2 for cardboard.
- the paper products produced according to the invention have a noticeably improved strength compared to such papers which were produced in the presence of an equal amount of native potato starch, which strength can be quantified, for example, on the basis of the tear length, the burst pressure, the CMT value and the tear resistance.
- the parts given in the examples are parts by weight, the percentages relate to the weight.
- the viscosities of the solidifiers were determined in an aqueous solution at a solids concentration of 7.5% by weight and a temperature of 45 ° C. in a Brookfield viscometer at 20 rpm;
- the viscosities of the enzymatically degraded starches were also determined in water at a concentration of 7.5% by weight and at a temperature of 45 ° C. in a Brookfield viscometer at 20 rpm.
- the sheets were made in a Rapid-Köthen laboratory sheet former.
- the dry tear length was determined according to DIN 53 112, sheet 1, the dry burst pressure according to Mullen, DIN 53 141, the CMT value according to DIN 53 143 and the tear propagation resistance according to Brecht-Inset according to DIN 53 115.
- the leaves were tested after 24-hour air conditioning at a temperature of 23 ° C and a relative humidity of 50%.
- the COD value was determined using the COD tester A from Grove Analysentechnik GmbH.
- a 25% slurry of native potato starch in water is mixed with such an amount of enzyme ( ⁇ -amylase from Aspergillus oryzae) that the resulting mixture contains 0.01% enzyme, based on the native potato starch used.
- This mixture is then heated to a temperature in the range from 90 to 95 ° C. with stirring within 15 minutes and then cooled to 70 ° C.
- the viscosity of the enzymatically degraded native potato starch is 24 mPa.s, measured at 45 ° C in 7.5% aqueous solution.
- polymer 1 aqueous solution is added to the aqueous solution of the enzymatic potato starch cooled to 70.degree. C. such that the resulting mixture contains 10% polymer 1, based on the enzymatically degraded potato starch used.
- the mixture is then stirred for a further 10 minutes at 70 ° C. and used according to the invention as a dry strength agent for paper by adding it to a stock suspension before sheet formation.
- the viscosity of the mixture is 82 mPa.s.
- a dry strength agent for paper is prepared by using a 25% aqueous solution of enzymatically degraded potato starch (viscosity of a 7.5% aqueous solution at 45 ° C 24 mPa.s) with that described above Polymer 2 mixes. A dry strength agent is obtained which has a viscosity of 108 mPa.s.
- a dry strength agent for paper is produced from the enzymatically digested starch and polymer 3 specified therein.
- the hardener has a viscosity of 122 mPa.s.
- a dry hardening agent is produced from the enzymatically degraded potato starch and the polymer 4.
- the viscosity of the hardener is 61 mPa.s.
- a dry hardening agent is produced by mixing the enzymatically degraded potato starch with the polymer 5.
- a dry strength agent is obtained which has a viscosity of 36 mPa.s.
- a hardening agent is produced by mixing the enzymatically degraded potato starch with the polymer 6.
- the solidifying agent has a viscosity of 28 mPa.s.
- the enzymatically degraded potato starch is mixed with the polymer 7. In this way, a dry strength agent with a viscosity of 31 mPa.s.
- the enzymatically degraded potato starch is mixed with the polymer 8.
- native potato starch is broken down with a quarter of the amount of ⁇ -amylase (enzyme) given above, an aqueous strong solution having a viscosity (measured at 45 ° C. in 7.5% aqueous solution) of 190 mPa.s results.
- the aqueous solution of the degraded starch is then mixed with the polymer 5 at 45 ° C. and used in the form of the aqueous solution of the mixture as a dry strength agent for paper.
- the viscosity is 210 mPa.s.
- native potato starch is broken down with only one tenth of the amount of enzyme specified there.
- the viscosity of the enzymatically degraded potato starch is 443 (measured in 7.5% aqueous solution at 45 ° C).
- the same amount of polymer 5 is then added to the solution of the enzymatically degraded potato starch, which has cooled to 45 ° C., instead of the polymer 1 used there.
- a dry strength agent for paper is obtained which has a viscosity of 476 mPa.s.
- Sheets with a weight of 120 g / m2 are produced in a Rapid Köthen sheet former.
- the paper stock consists of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR (Schopper-Riegler) and to which the solidifier 1 described above is added in an amount such that the solids content of solidifier 1, based on dry Paper stock, 3.3%.
- the pH of the stock suspension is adjusted to 7.5.
- the leaves made from this fabric model are air-conditioned and then the CMT value, the dry burst pressure and the dry tear length are measured using the methods specified above. The results are shown in Table 1.
- Example 1 is repeated in each case with the exception that the hardeners given in Table 1 are used instead of the hardeners 1 used in Example 1. The results thus obtained are shown in Table 1.
- Example 1 is repeated without adding a dry strength agent, i.e. a fabric of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR, is dewatered in a Rapid-Köthen sheet former, whereby sheets with a basis weight of 120 g / m2 are obtained.
- a dry strength agent i.e. a fabric of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR
- a Rapid-Köthen sheet former whereby sheets with a basis weight of 120 g / m2 are obtained.
- Comparative example 1 is repeated with the exception that 3% native potato starch, based on dry fiber material, is added to the paper stock.
- the strength values of the paper sheets thus obtained are given in Table 1.
- Comparative example 2 is repeated with the exception that the native potato starch is replaced by the same amount of hardener 11.
- the strength values of sheets thus obtained are given in Table 1.
- Paper with a basis weight of 120 g / m 2 and a width of 68 cm is produced on a test paper machine at a speed of the paper machine of 50 m / min.
- 80% mixed waste paper and 20% bleached sulfite pulp with a freeness of 56 ° SR are used as paper stock.
- hardener 9 is added in an amount of 3.3%, based on dry paper stock.
- the white water has a pH of 7.3.
- the strength values of the paper so produced are given in Table 2.
- Example 11 is repeated except that the same amount of hardener 10 is used.
- the strength values of the paper produced in this way are given in Table 2.
- paper with a basis weight of 120 g / m 2 is produced from a paper stock which consists of 80% mixed waste paper and 20% bleached beech sulfite pulp with a freeness of 56 ° SR.
- the speed of the paper machine is set to 50 m / min, the pH of the white water is 7.3.
- the difference to example 11 is that no dry strength agent is used.
- the strength values of the paper thus obtained are given in Table 2.
- Comparative example 4 is repeated with the exception that 3% native potato starch, based on dry fiber, is additionally added to the paper stock described there before dewatering.
- the strength values of the paper thus obtained are given in Table 2.
- Comparative example 4 is repeated with the exception that 3% strengthening agent 11, based on dry fiber material, is additionally added to the paper stock described there before dewatering.
- the strength values of the paper thus obtained are given in Table 2.
- Table 2 example used hardener no. CMT value [N] Dry burst pressure [kPa] Dry tear length [m] COD value in white water [mg / l] 11 9 142 164 3703 213 12 10th 150 172 3921 203
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Making Paper Articles (AREA)
- Cartons (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Electroluminescent Light Sources (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88111572T ATE67538T1 (de) | 1987-07-25 | 1988-07-19 | Verfahren zur herstellung von papier, pappe und karton mit hoher trockenfestigkeit. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3724646 | 1987-07-25 | ||
DE19873724646 DE3724646A1 (de) | 1987-07-25 | 1987-07-25 | Verfahren zur herstellung von papier, pappe und karton mit hoher trockenfestigkeit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0301372A1 true EP0301372A1 (fr) | 1989-02-01 |
EP0301372B1 EP0301372B1 (fr) | 1991-09-18 |
Family
ID=6332336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88111572A Expired - Lifetime EP0301372B1 (fr) | 1987-07-25 | 1988-07-19 | Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec |
Country Status (13)
Country | Link |
---|---|
US (1) | US4940514A (fr) |
EP (1) | EP0301372B1 (fr) |
JP (1) | JP2596593B2 (fr) |
KR (1) | KR890002493A (fr) |
AT (1) | ATE67538T1 (fr) |
AU (1) | AU593422B2 (fr) |
CA (1) | CA1302021C (fr) |
DE (2) | DE3724646A1 (fr) |
DK (2) | DK170826B1 (fr) |
ES (1) | ES2024596B3 (fr) |
FI (1) | FI92083C (fr) |
NO (1) | NO172402C (fr) |
NZ (1) | NZ225536A (fr) |
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WO1996034903A1 (fr) * | 1995-05-02 | 1996-11-07 | Basf Aktiengesellschaft | Polymeres greffes constitues de polymeres contenant des unites d'oxyde d'alkylene et de composes ethyleniquement insatures, leur procede de preparation et leur utilisation |
EP0685591B1 (fr) * | 1992-06-17 | 1999-03-03 | Nicca Chemical Co., Ltd. | Utilisation des agents de fixation de colorant |
WO2000003091A1 (fr) * | 1998-07-10 | 2000-01-20 | Raisio Chemicals Ltd | Composition additive pour fabrication du papier |
EP1384811A1 (fr) * | 2002-07-23 | 2004-01-28 | Mühle Rüningen GmbH & Co. KG | Agent pour augmenter la capacité de rétention d'amidon par la pâte à papier |
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US5354424A (en) * | 1989-02-10 | 1994-10-11 | Rha Chokyun | Paper composition and methods therefor |
CA2042560C (fr) * | 1990-08-10 | 2006-07-11 | Chokyun Rha | Composants polymeriques entrant dans la fabrication du papier |
DE4311598A1 (de) * | 1993-04-08 | 1994-10-13 | Henkel Kgaa | Verfahren zur Kontrolle des Absetzens klebender Verunreinigungen aus Papierstoff-Suspensionen |
US5382324A (en) * | 1993-05-27 | 1995-01-17 | Henkel Corporation | Method for enhancing paper strength |
US5700893A (en) * | 1993-11-12 | 1997-12-23 | Betzdearborn Inc. | Water-soluble cationic copolymers and their use as flocculants and drainage aids |
US5473033A (en) * | 1993-11-12 | 1995-12-05 | W. R. Grace & Co.-Conn. | Water-soluble cationic copolymers and their use as drainage retention aids in papermaking processes |
US5720888A (en) * | 1993-11-12 | 1998-02-24 | Betzdearborn Inc. | Water-soluble cationic copolymers and their use as flocculants |
US5516852A (en) * | 1993-11-12 | 1996-05-14 | W. R. Grace & Co.-Conn. | Method of producing water-soluble cationic copolymers |
DE4438708A1 (de) † | 1994-10-29 | 1996-05-02 | Basf Ag | Verfahren zur kationischen Modifizierung von Stärke und Verwendung der kationisch modifizierten Stärke |
NL1001218C2 (nl) * | 1995-09-15 | 1997-03-20 | Roermond Papier Bv | Papier en karton omvattende eiwitmateriaal. |
AU7718496A (en) * | 1995-10-20 | 1997-05-07 | Drexel University | End-functionalized aniline-based oligomers, corrosion-resistant copolymers and methods of making the same |
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DE19713755A1 (de) * | 1997-04-04 | 1998-10-08 | Basf Ag | Verfahren zur Herstellung von Papier, Pappe und Karton mit hoher Trockenfestigkeit |
US6165322A (en) * | 1997-07-29 | 2000-12-26 | Hercules Incorporated | Polyamidoamine/epichlorohydrin resins bearing polyol sidechains as dry strength agents |
FI105565B (fi) | 1999-02-05 | 2000-09-15 | Raisio Chem Oy | Polymeeridispersio ja menetelmä sen valmistamiseksi |
PT1183422E (pt) | 1999-04-01 | 2004-03-31 | Basf Ag | Modificacao do amido com polimeros cationicos e utilizacao dos amidos modificados como agentes de solidificacao a seco para papel |
US6315866B1 (en) * | 2000-02-29 | 2001-11-13 | Nalco Chemical Company | Method of increasing the dry strength of paper products using cationic dispersion polymers |
US6710175B2 (en) * | 2001-08-31 | 2004-03-23 | Kevin Ray Anderson | Compositions suitable as additives in the paper industry, preparation; use; and, paper comprising such |
DE10164659C2 (de) * | 2001-12-21 | 2003-10-30 | Univ Dresden Tech | Bindemittelfreier Faserdämmstoff und Verfahren zu dessen Herstellung |
US7090745B2 (en) * | 2002-09-13 | 2006-08-15 | University Of Pittsburgh | Method for increasing the strength of a cellulosic product |
US7494566B2 (en) * | 2002-09-13 | 2009-02-24 | University Of Pittsburgh - Of The Commonwealth System Of Higher Education | Composition for increasing cellulosic product strength and method of increasing cellulosic product strength |
US20050109476A1 (en) * | 2003-07-21 | 2005-05-26 | Muhle Runingen Gmbh & Co. Kg | Medium for increasing the absorption capacity of paper pulp for starch |
EP1725616A2 (fr) * | 2004-02-27 | 2006-11-29 | University Of Pittsburgh | Gels polymeres en reseau et leur utilisation pour recuperer des hydrocarbures |
US8529732B2 (en) * | 2009-02-05 | 2013-09-10 | Basf Se | Method for producing paper, card and board with high dry strength |
US8444818B2 (en) | 2010-04-07 | 2013-05-21 | Hercules Incorporated | Stable and aqueous compositions of polyvinylamines with cationic starch, and utility for papermaking |
CN103930619B (zh) | 2011-08-25 | 2016-12-07 | 索理思科技开曼公司 | 增加强度助剂在制造纸和纸板中的优势的方法 |
WO2014002945A1 (fr) * | 2012-06-25 | 2014-01-03 | 株式会社片山化学工業研究所 | Procédé de fabrication de carton |
WO2015144428A1 (fr) * | 2014-03-28 | 2015-10-01 | Basf Se | Procédé de fabrication de carton ondulé |
US11098453B2 (en) | 2019-05-03 | 2021-08-24 | First Quality Tissue, Llc | Absorbent structures with high absorbency and low basis weight |
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DE2636951A1 (de) * | 1976-08-17 | 1978-02-23 | Pelikan Werke Wagner Guenther | Staerkeabbau in der leimung von papieren mittels amylasen |
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 |
DE2821830A1 (de) * | 1978-05-19 | 1979-11-22 | Basf Ag | Verfahren zur oberflaechenleimung von papier |
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US2433285A (en) * | 1944-04-21 | 1947-12-23 | A M Meincke & Son Inc | Starch for tub sizing paper |
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DE3128478A1 (de) * | 1981-07-18 | 1983-02-03 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von linearen, basischen polymerisaten |
DE3534273A1 (de) * | 1985-09-26 | 1987-04-02 | Basf Ag | Verfahren zur herstellung von vinylamin-einheiten enthaltenden wasserloeslichen copolymerisaten und deren verwendung als nass- und trockenverfestigungsmittel fuer papier |
DE3706525A1 (de) * | 1987-02-28 | 1988-09-08 | Basf Ag | Verfahren zur herstellung von papier, pappe und karton mit hoher trockenfestigkeit |
-
1987
- 1987-07-25 DE DE19873724646 patent/DE3724646A1/de not_active Withdrawn
-
1988
- 1988-07-14 CA CA000572015A patent/CA1302021C/fr not_active Expired - Lifetime
- 1988-07-19 ES ES88111572T patent/ES2024596B3/es not_active Expired - Lifetime
- 1988-07-19 AT AT88111572T patent/ATE67538T1/de not_active IP Right Cessation
- 1988-07-19 EP EP88111572A patent/EP0301372B1/fr not_active Expired - Lifetime
- 1988-07-19 DE DE8888111572T patent/DE3864938D1/de not_active Expired - Lifetime
- 1988-07-21 DK DK407888A patent/DK170826B1/da not_active IP Right Cessation
- 1988-07-21 DK DK407888D patent/DK407888A/da unknown
- 1988-07-22 AU AU19294/88A patent/AU593422B2/en not_active Ceased
- 1988-07-22 NO NO883274A patent/NO172402C/no not_active IP Right Cessation
- 1988-07-22 NZ NZ225536A patent/NZ225536A/xx unknown
- 1988-07-25 JP JP63183732A patent/JP2596593B2/ja not_active Expired - Fee Related
- 1988-07-25 US US07/223,334 patent/US4940514A/en not_active Expired - Lifetime
- 1988-07-25 KR KR1019880009394A patent/KR890002493A/ko not_active Application Discontinuation
- 1988-07-25 FI FI883504A patent/FI92083C/fi not_active IP Right Cessation
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DE2636951A1 (de) * | 1976-08-17 | 1978-02-23 | Pelikan Werke Wagner Guenther | Staerkeabbau in der leimung von papieren mittels amylasen |
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 |
DE2821830A1 (de) * | 1978-05-19 | 1979-11-22 | Basf Ag | Verfahren zur oberflaechenleimung von papier |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0685591B1 (fr) * | 1992-06-17 | 1999-03-03 | Nicca Chemical Co., Ltd. | Utilisation des agents de fixation de colorant |
WO1996034903A1 (fr) * | 1995-05-02 | 1996-11-07 | Basf Aktiengesellschaft | Polymeres greffes constitues de polymeres contenant des unites d'oxyde d'alkylene et de composes ethyleniquement insatures, leur procede de preparation et leur utilisation |
WO2000003091A1 (fr) * | 1998-07-10 | 2000-01-20 | Raisio Chemicals Ltd | Composition additive pour fabrication du papier |
EP1384811A1 (fr) * | 2002-07-23 | 2004-01-28 | Mühle Rüningen GmbH & Co. KG | Agent pour augmenter la capacité de rétention d'amidon par la pâte à papier |
Also Published As
Publication number | Publication date |
---|---|
ATE67538T1 (de) | 1991-10-15 |
FI883504A (fi) | 1989-01-26 |
NO172402C (no) | 1993-07-14 |
FI92083C (fi) | 1994-09-26 |
DE3724646A1 (de) | 1989-02-02 |
NO883274D0 (no) | 1988-07-22 |
NO883274L (no) | 1989-01-26 |
FI92083B (fi) | 1994-06-15 |
JPS6440694A (en) | 1989-02-10 |
DK407888D0 (da) | 1988-07-21 |
AU593422B2 (en) | 1990-02-08 |
NZ225536A (en) | 1989-09-27 |
ES2024596B3 (es) | 1992-03-01 |
JP2596593B2 (ja) | 1997-04-02 |
AU1929488A (en) | 1989-01-27 |
DE3864938D1 (de) | 1991-10-24 |
NO172402B (no) | 1993-04-05 |
EP0301372B1 (fr) | 1991-09-18 |
CA1302021C (fr) | 1992-06-02 |
DK407888A (da) | 1989-01-26 |
FI883504A0 (fi) | 1988-07-25 |
KR890002493A (ko) | 1989-04-10 |
DK170826B1 (da) | 1996-01-29 |
US4940514A (en) | 1990-07-10 |
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