WO2006058711A2 - Papierleimungsmittel - Google Patents
Papierleimungsmittel Download PDFInfo
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- WO2006058711A2 WO2006058711A2 PCT/EP2005/012750 EP2005012750W WO2006058711A2 WO 2006058711 A2 WO2006058711 A2 WO 2006058711A2 EP 2005012750 W EP2005012750 W EP 2005012750W WO 2006058711 A2 WO2006058711 A2 WO 2006058711A2
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- WIPO (PCT)
- Prior art keywords
- sizing agent
- paper
- acid
- weight
- reactive
- Prior art date
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Classifications
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- 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
- D21H21/16—Sizing or water-repelling agents
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/07—Nitrogen-containing compounds
- D21H17/08—Isocyanates
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
- D21H17/15—Polycarboxylic acids, e.g. maleic acid
- D21H17/16—Addition products thereof with hydrocarbons
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
-
- 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
- D21H17/35—Polyalkenes, e.g. polystyrene
Definitions
- the invention relates to a paper sizing agent comprising a stable aqueous dispersion of a reactive sizing agent, a process for its preparation and its use for sizing paper, board and cardboard.
- Reactive sizing agents such as alkylketene dimers
- Reactive sizing agents are widely used for massaging paper, board and board.
- Reactive sizing agents are usually sold as ready-to-use dispersions. They usually contain cationic polymers such as cationic starch or synthetic cationic polymers which impart substantivity to cellulose to the reactive sizing agents and / or act as protective colloids.
- the sizing dispersions In order for the sizing dispersions to be suitable for use, they must be sufficiently stable to viscosity so that they remain pumpable and dilutable until they are added to the paper machine. In practice, the dispersions often have to remain thin for several weeks at temperatures up to 40 ° C. These requirements are difficult to meet due to the inherent instability of colloidal systems. In many cases, the viscosity of the dispersions increases sharply until they can no longer be pumped or the dispersions coagulate. The higher the content of the reactive size dispersions, the more pronounced are the problems.
- alkyl diketene (AKD) dispersions with cationic starch as protective colloid and an anionic dispersant as stabilizer are known.
- AKD dispersions which contain a protective colloid in the form of a copolymer of N-vinylpyrrolidone and N-vinylimidazole or a condensate condensation product based on polyethyleneimines.
- WO 2004/022847 discloses the use of polyvinylamines as promoters for engine sizing in starch-containing AKD dispersions.
- the object of the invention is to provide paper sizing agents based on aqueous dispersions of reactive sizing agents which have a good sizing effect and sufficient viscosity stability.
- a paper sizing agent which comprises:
- the paper sizing agents according to the invention contain from 1 to 50% by weight of reactive sizing agent, based on the total weight of the paper sizing agent.
- stable dispersion is intended to mean that the dispersion remains liquid at 40 ° C. for 4 weeks and does not coagulate.
- linear polymer is meant a polymer that is substantially free of branching and crosslinking.
- Polyalkyleneimines, in particular polyethylenimines, are not considered to be “linear polymers” because of their structure branched over by tertiary amino groups.
- basic nitrogen atoms are meant those nitrogen atoms which can be protonated in aqueous solution by a Bronsted acid.
- Basic nitrogen atoms are in particular primary, secondary and tertiary amino groups, of which primary amino groups are preferred.
- the basic nitrogen atoms in the nitrogen-containing polymer are preferably at least 90 mol%, in particular substantially quantitatively protonated.
- the protonation can be carried out by reaction with a mineral acid, such as hydrochloric acid, sulfuric acid or phosphoric acid, but is preferably carried out by reaction with a carboxylic acid.
- Suitable carboxylic acids are, above all, formic acid, acetic acid, propionic acid, oxalic acid, tartaric acid, citric acid and the like.
- the nitrogen-containing polymer used in the invention contains at least 3 mmol / g, preferably at least 5 mmol / g basic nitrogen atoms, especially 7.5 to 23 mmol / g, and most preferably 12 to 18 mmol / g.
- the content p of a polymer of basic nitrogen atoms can be calculated according to the following equation:
- x is N for the molar ratio of a monomer having a basic nitrogen atom (such as vinylamine), X 0 for the molar fraction of a monomer without (basic) nitrogen atoms (such as vinylformamide), M N for the molecular weight of the monomer with basic nitrogen atom and M 0 for the Molecular weight of the monomer without (basic) nitrogen atoms.
- molar fraction refers to the monomer composition of the polymer.
- the average molecular weight Mw of the nitrogen-containing polymer is e.g. 500 to 10 million, preferably 750 to 5 million and particularly preferably 1 000 to 2 million (determined by light scattering).
- This molar mass range corresponds, for example, to K values of 30 to 150, preferably 60 to 90 (determined after
- Suitable nitrogen-containing polymers include hydrolysis products of homopolymers and copolymers of N-vinylcarboxamides and / or N-vinylcarboximides.
- the acyl group (s) is cleaved off by the action of acids, bases or enzymes to form vinylamine units.
- Suitable N-vinylcarboxamides are generally open-chain and cyclic N-vinylcarboxamides.
- Preferred N-vinylcarboxamides are open-chain N-vinylcarboxamides, in particular those open-chain N-vinylcarboxamides whose hydrolysis yields a primary amine.
- Examples of particularly suitable N-vinylcarboxamides are N-vinylformamide, N-vinyl-N-methylformamide, N-vinylacetamide, N-vinyl-N-methylacetamide, N-vinyl-N-ethylacetamide and N-vinylpropionamide, in particular N -Vinylformamid.
- N-vinylimides are N-vinylsuccinimide and N-vinylphthalimide.
- the stated monomers can be polymerized either alone or in a mixture with one another or together with other monomers.
- Vinylamine containing polymers are z. From US-A-4,421,602, US-A 5,334,287, EP-A-0 216 387, US-A-5,981,689, WO-A-00/63295 and US-A-6,121,409.
- Suitable monoethylenically unsaturated monomers which are copolymerized with the N-vinylcarboxamides are all compounds which can be copolymerized therewith.
- vinyl esters of saturated carboxylic acids of 1 to 6 carbon atoms such as vinyl formate, vinyl acetate, vinyl propionate and vinyl butyrate and vinyl ethers such as C 1 - to C 6 -alkyl vinyl ethers, for example methyl or ethyl vinyl ether.
- Suitable comonomers are esters, amides and nitriles of ethylenically unsaturated C 3 - to C 6 -carboxylic acids, for example methyl acrylate, methyl methacrylate, ethyl acrylate and ethyl methacrylate, acrylamide and methacrylamide and also acrylonitrile and methacrylonitrile.
- carboxylic acid esters are derived from glycols or polyalkylene glycols, wherein in each case only one OH group is esterified, e.g. Hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate and acrylic acid monoesters of polyalkylene glycols having a molecular weight of 500 to 10,000.
- Suitable comonomers are amides of ethylenically unsaturated carboxylic acids such as acrylamide, methacrylamide and N-alkyl mono- and diamides of monoethylenically unsaturated carboxylic acids having alkyl radicals of 1 to 6 carbon atoms, e.g. N-methylacrylamide, N, N-dimethylacrylamide, N-methylmethacrylamide, N-ethylacrylamide, N-propylacrylamide and tert-butylacrylamide.
- amides of ethylenically unsaturated carboxylic acids such as acrylamide, methacrylamide and N-alkyl mono- and diamides of monoethylenically unsaturated carboxylic acids having alkyl radicals of 1 to 6 carbon atoms, e.g. N-methylacrylamide, N, N-dimethylacrylamide, N-methylmethacrylamide, N-ethylacrylamide, N-propylacrylamide and ter
- N-vinylpyrrolidone N-vinylcaprolactam
- acrylonitrile methacrylonitrile
- N-vinylimidazole substituted N-vinylimidazoles
- N-vinyl-2-methylimidazole N-vinyl-4-methylimidazole
- N-vinyl-5-methylimidazole N-vinyl-2-ethylimidazole
- N-vinylimidazolines such as N-vinylimidazoline, N-vinyl-2-methylimidazo-Nn and N-vinyl-2-ethylimidazoline.
- Such copolymers preferably contain at least 50 mol% of at least one N-vinylcarboxamide in copolymerized form.
- the comonomers are preferably free of acid groups.
- N-vinylformamide homopolymers or N-vinylformamide copolymers for example vinyl formate, vinyl acetate, vinyl propionate, acrylonitrile, N-vinylcaprolactam, N-vinylurea, N-vinylpyrrolidone or C 1 - bis C 6 alkyl vinyl ethers whose N-vinylformamide units are then hydrolyzed to N-Vinylaminein chute to a degree of hydrolysis of preferably 25 to 100 mol%, particularly preferably 50 to 100 mol% and particularly preferably 70 to 100 mol%.
- the hydrolysis of the above-described polymer merisate is carried out by known methods by the action of acids, bases or enzymes.
- acids are used as hydrolysis agents
- the vinylamine units of the polymers are present as the ammonium salt, while hydrolysis with bases gives rise to the free amino groups.
- the vinylamine polymers are preferably used in salt-free form.
- Salt-free aqueous solutions can be prepared, for example, from the salt-containing polymer solutions described above by means of ultrafiltration on suitable membranes at separation limits of, for example, 1,000 to 500,000 daltons, preferably 10,000 to 300,000 daltons.
- Preferred vinylamine polymers are vinylamine homopolymers having a degree of hydrolysis of from 25 to 100 mol%, and from 25 to 100 mol% of hydrolyzed copolymers of vinylformamide and vinyl acetate, vinyl alcohol, vinylpyrrolidone or acrylamide, in each case having K values of from 30 to 150, especially 60 to 90.
- the nitrogen-containing polymer it is possible to use polymers which contain polymerized units of monomers having side groups comprising basic nitrogen atoms or their copolymers with monomers without (basic) nitrogen atoms in a suitable ratio.
- Suitable monomers having side groups comprising basic nitrogen atoms are e.g. Allylamine, basic acrylates, e.g. Dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, dimethyaminopropyl acrylate, dimethylaminopropyl methacrylate, diethylaminopropyl acrylate, dimethylaminobutyl acrylate and diethylaminobutyl acrylate; basic (meth) acrylamides, e.g.
- Suitable monomers without (basic) nitrogen atoms are those mentioned above.
- cationic starch and "cationically modified starch” are used interchangeably herein. Suitable cationic starches are commercially available.
- the starting starch can be any type of starch, such as. Potato starch, corn starch, wheat starch, waxy maize starch and tapioca starch. Starches having an amylopectin content of more than 50% by weight, preferably 80 to 100% by weight, are preferred, with those having an amylopectin content of at least 90% by weight being particularly preferred.
- Part of the free hydroxyl groups of the starch are coupled by means of a chemical reaction to protonatable or cationically charged groups, in particular dialkylamino or trialkylammonium groups.
- Particularly suitable cationizing agents are dialkylaminoalkyl epoxides and dialkylaminoalkyl halides. Instead of the alkyl groups, the cationizing agents may also contain aryl groups.
- Preferred cationizing agents are, for example, N, N-dimethylaminoethyl chloride, N, N-diethylaminoethyl chloride, N, N-dimethylaminopropyl chloride, 3-dibutylamino-1, 2-epoxypropane, 2-bromo-5-diethylaminopentane hydrobromide, N- (2,3-epoxypropyl ) - piperidine, 2,3-epoxypropyltrimethylammonium chloride and N, N- (2,3-epoxypropyl) -methylaniline.
- hydrochloric acid or other salts can also be used.
- the reaction between the starting starch and the cationizing reagent is preferably carried out in an alkaline medium.
- the proportion of reagent to be used depends on the desired degree of substitution.
- the degree of substitution is the ratio of cationic group to carbohydrate unit (i.e., glucose unit). He can assume a maximum value of 3.
- Suitable reactive sizing agents for the paper sizing agents according to the invention are, for example, C 12 -C 22 -alkyl ketene dimers, C 5 -C 22 -alklyl or C 5 -C 22 -alkenylsuccinic anhydrides, C 12 -C 36 -alkyl isocyanates and / or organic isocyanates. cyanates such as dodecyl isocyanate, octadecyl isocyanate, tetradecyl isocyanate, hexadecylsiocyanate, eicosyl isocyanate and decyl isocyanate.
- Preferably used mass modifiers are alkyl ketene dimers and long-chain alkyl or alkenylsuccinic anhydrides.
- alkylketene dimers examples include tetradecyldiketene, stearydikethene, lauryldiketen, palmityldiketen, oleyldiketen, Behenyldiketen or mixtures thereof. Also suitable are alkyldiketenes with different alkyl groups such as stearyl palmitate diketene, benzyl stearyl diketene, behenyl enyl diketene or palmityl behenyl diketene. Stearyldiketen, Palmityldiketen, Behenyldiketen or mixtures of Behenyldiketen and Stearyldiketen are preferably used.
- Substituted succinic anhydrides suitable as reactive sizes are, for example, decenylsuccinic anhydride, n-octadecenylsuccinic anhydride, dodecenylsuccinic anhydride and n-hexadecenylsuccinic anhydride.
- the aqueous dispersions according to the invention usually have a content of reactive sizes of from 1 to 50% by weight, based on the total weight of the dispersion.
- the dispersions have a content of 1 to 50 wt .-%, preferably 5 to 35 wt .-%, based on the total weight of the dispersion, of C 12 - to C 22 alkyldiketenes.
- the content of succinic anhydrides is, for example, from 1 to 25% by weight, preferably from 2 to 10% by weight, based on the total weight of the dispersion.
- the sizing agents of the present invention typically contain an anionic dispersant.
- the content of anionic dispersants in the aqueous dispersion is for example 0.01 to 5 wt .-%, preferably 0.01 to 2.5 wt .-% and most preferably 0.1 to 1 wt .-%, based on the reactive.
- Preferred anionic dispersants are selected from condensation products
- the anionic dispersants may be in the form of the free acids, the alkali metal, alkaline earth metal and / or ammonium salts.
- the ammonium salts can be derived from both ammonia and from primary, secondary and tertiary amines, for example the ammonium salts of dimethylamine, trimethylamine, hexylamine, cyclohexylamine, dicyclohexylamine, ethanolamine, diethanolamine and triethanolamine are suitable.
- the condensation products described above are known and commercially available. They are prepared by condensing said components, it being possible to use the corresponding alkali metal, alkaline earth metal or ammonium salts instead of the free acids.
- Suitable catalysts for the condensation are, for example, acids such as sulfuric acid, p-toluenesulfonic acid and phosphoric acid.
- Naphthalenesulfonic acid or its alkali metal salts are condensed with formaldehyde preferably in a molar ratio of 1: 0.1 to 1: 2 and usually in a molar ratio of 1: 0.5 to 1: 1.
- the molar ratio for the production of condensates of phenol, phenolsulfonic acid and formaldehyde is also in the range given above, using any mixtures of phenol and phenolsulfonic acid instead of naphthalenesulfonic acid in the condensation with formaldehyde.
- phenolsulfonic acid instead of phenolsulfonic acid, it is also possible to use the alkali metal and ammonium salts of phenolsulfonic acid.
- the condensation of the abovementioned starting materials may optionally be carried out additionally in the presence of urea.
- urea based on naphthalenesulfonic acid or on the mixture of phenol and phenolsulfonic acid, 0.1 to 5 mol of urea are used. substance per mole of naphthalenesulfonic acid or per mole of the mixture of phenol and phenolsulfonic acid.
- the condensation products have, for example, molar masses in the range from 800 to 100,000, preferably 1,000 to 30,000 and in particular from 4,000 to 25,000.
- anionic dispersants are salts which are obtained, for example, by neutralizing the condensation products with lithium hydroxide, sodium hydroxide, Potassium hydroxide or ammonia receives.
- the pH of the salts is, for example, in the range of 7 to 10.
- anionic dispersants are lignosulfonic acid and its alkali metal, alkaline earth metal or ammonium salts.
- amphiphilic copolymers are amphiphilic copolymers
- hydrophilic monomers having an anionic group such as monoethylenically unsaturated carboxylic acids, monoethylenically unsaturated sulfonic acids, monoethylenically unsaturated phosphonic acids or mixtures thereof.
- (a) are, for example, olefins having 2 to 150 carbon atoms, styrene, ⁇ -methylstyrene, ethylstyrene, 4-methylstyrene, acrylonitrile, methacrylonitrile, esters of monoethylenically unsaturated C 3 - to C 5 -carboxylic acids and monohydric alcohols, amides of Acrylic acid or methacrylic acid with C 1 - to C 24 -alkylamines, vinyl esters of saturated monocarboxylic acids having 2 to 24 C atoms, diesters of maleic acid or fumaric acid with monohydric C 1 - to C 24 -alcohols, vinyl ethers of alcohols having 3 to 24 C- Atoms or mixtures of the compounds mentioned.
- amphiphilic copolymers contain as hydrophilic monomers (b), for example C 3 - to C 10 - monoethylenically unsaturated carboxylic acids or their anhydrides, 2-acrylamido-2-methylpropanesulfonic acid, vinylsulfonic acid, styrenesulfonic acid, vinylphosphonic acid, salts of said monomers or mixtures thereof as hydrophilic monomers polymerized in an anionic group.
- hydrophilic monomers (b) for example C 3 - to C 10 - monoethylenically unsaturated carboxylic acids or their anhydrides, 2-acrylamido-2-methylpropanesulfonic acid, vinylsulfonic acid, styrenesulfonic acid, vinylphosphonic acid, salts of said monomers or mixtures thereof as hydrophilic monomers polymerized in an anionic group.
- aqueous sizing agent dispersions containing as anionic dispersant amphiphilic copolymers (a) ⁇ -olefins having 4 to 12 C atoms, styrene or mixtures thereof as hydrophobic monomers and
- Preferred anionic dispersants are copolymers of maleic anhydride with C 4 - to C 12 -olefins, more preferably C 8 -olefins, such as octene-1 and diisobutene. Most preferred is diisobutene.
- the molar ratio between maleic anhydride and olefin is, for example, in the range 0.9: 1 to 3: 1, preferably from 0.95: 1 to 1, 5: 1.
- These copolymers are preferably used in hydrolyzed form as aqueous solution or dispersions, wherein the anhydride group is present open and the carboxyl groups are preferably partially or completely neutralized.
- alkali metal bases such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate
- alkaline earth salts such as calcium hydroxide, calcium carbonate, magnesium hydroxide, ammonia, primary, secondary or tertiary amines, such as triethylamine, triethanolamine, diethanolamine, ethanolamine, morpholine, etc.
- amphiphilic free acid-based copolymers are used in the form of water-soluble salts, e.g. the corresponding alkali metal, alkaline earth metal and ammonium salts are used.
- the molecular weight Mw of the amphiphilic copolymers is, for example, 800 to 250,000, usually 1,000 to 100,000 and is preferably in the range from 3,000 to 20,000, in particular from 1,500 to 10,000.
- the acid numbers of the amphiphilic copolymers are, for example, 50 to 500 , preferably 150 to 300 mg KOH / g polymer.
- aqueous dispersions according to the invention may contain further components, such as, for example, non-cellulose-reactive hydrophobic substances which contribute to improving the stability and are described, for example, in EP-A-437 764 and EP-A-658 228.
- Suitable non-cellulose-reactive substances are, for example, fatty acids, amides and esters as well as waxes.
- stearic acid behenyl ester examples thereof without any claim to completeness are stearic acid behenyl ester, myristic acid stearyl ester, stearic acid isododecyl ester, carbonic acid oleyl ester, carbonic acid oleylstearyl ester, oleyl N, N-distearyl urethane, parrafin, di-oleic acid glycerol ester, tris-oleic acid glycerol ester and tris-stearic acid glycerol ester.
- finely divided, aqueous polymer dispersions which are a sizing agent for paper may additionally be present in the dispersions according to the invention.
- Such polymer dispersions are known, for example, from EP-B-0 051 144, EP-B-0 257 412, EP-B 276 770, EP-B 0 058 313 and EP-B 150 003.
- Such polymer dispersions acting as a paper sizing agent are obtainable for example by reacting 1 to 32 parts by weight of a mixture of
- Suitable monomers of group (a) are styrene, acrylonitrile, methacrylonitrile or mixtures of styrene and acrylonitrile or of styrene and methacrylonitrile.
- monomers of group (b) are used acrylic acid and / or methacrylic acid esters of C 1 - to C 18 -alcohols and / or vinyl esters of saturated C 2 - to C 4 -carboxylic acids.
- monomer of group (b) butyl acrylate and butyl methacrylate, for example, acrylic acid isobutyl acrylate, acrylic acid n-butyl acrylate and methacrylic acid isobutyl acrylate.
- Examples of monomers of group (c) are butadiene, isoprene, C 3 -C 5 -monoethylenically unsaturated carboxylic acids, acrylamidomethylpropanesulfonic acid, sodium vinylsulfonate, vinylimidazole, N-vinylformamide, acrylamide, methacrylamide, N-vinylimidazoline and cationic polymers such as dimethylaminopropylmethacrylamide or dimethylaminoethyl methochloride. From 1 to 32 parts by weight of a monomer mixture of components (a) to (c) are used per 1 part by weight of the copolymer.
- the monomers of components (a) and (b) can be copolymerized in any ratio, for example in a molar ratio of 0.1: 1 to 1: 0.1. If necessary, the monomers of group (c) are used to modify the properties of the copolymers. Details on the preparation of these additional polymer dispersions can be found in WO-A-96/31650 and the literature cited therein.
- polymer dispersions are used in the aqueous dispersions of reactive sizes according to the invention, preference is given to those which contain cationic polymers such as dimethylaminopropylmethacrylamide and / or dimethylaminoethyl acrylate in combination with styrene, acrylonitrile, butadiene and / or acrylic acid esters.
- cationic polymers such as dimethylaminopropylmethacrylamide and / or dimethylaminoethyl acrylate in combination with styrene, acrylonitrile, butadiene and / or acrylic acid esters.
- their content is generally from 25 to 300% by weight, preferably from 50 to 250% by weight and more preferably from 75 to 200% by weight, based on the reactive sizing agent.
- the invention further provides a process for the preparation of the aqueous dispersions of reactive sizes according to the invention.
- the reactive sizing agents are usually heated to a temperature above their melting point and emulsified in molten form in water under the action of shearing forces.
- the liquid alkenyl succinic anhydride can be emulsified already at room temperature.
- lipophilic substances such as fatty acids, waxes, resin acids and resins, fatty acid amides or esters, the melting point of the reactive sizing agent may optionally be lowered, thereby improving the stability of the resulting dispersion.
- the dispersing step is preferably carried out at temperatures of, for example, 20 to 100, preferably 40 to 90 ° C.
- the sizing agent is preferably added in the form of a melt. It has not been proven to provide the nitrogen-containing polymer and to provide it with an anionic dispersant.
- apparatuses known to the person skilled in the art are used, for example high-pressure homogenizers, colloid mills and ultrasound dispersants. The resulting dispersion is cooled in each case.
- the paper sizing agent according to the invention has a viscosity, for example, in the range from 20 to 1,000 mPas, preferably 100 to 500 mPas (measured using a Brookfield viscometer and a temperature of 22 ° C.).
- the viscosity increases during storage for 4 weeks at 4O 0 C, preferably to a maximum of less than twice the value of initial viscosity immediately after preparation to.
- the pH is preferably in the range from 3 to 4.
- aqueous sizing agent dispersions having an average particle size of the sizing agents are obtained in the range from 100 to 3,000 nm, preferably 250 to 2,000 nm.
- the dispersions according to the invention are used as engine size agents in the production of paper, board and cardboard.
- Paper, board and board are usually made by dewatering a slurry of cellulosic fibers.
- Suitable cellulosic fibers are all types customary for this purpose, for example cellulose fibers from mechanical pulp and fibers derived from annual plants. costume.
- Wood pulp includes, for example, groundwood, thermomechanical pulp (TMP), chemothermomechanical pulp (CTMP), pressure groundwood, semi-pulp, high yield pulp, and refiner mechanical pulp (RMP), as well as recovered paper.
- pulps that can be used in bleached or unbleached form Examples include sulphate, sulphite and soda pulps.
- unbleached pulps also referred to as unbleached kraft pulp, are used.
- the fibers mentioned can be used alone or in a mixture.
- the pH of the cellulose fiber slurry is, for example, 4 to 8, preferably 6 to 8.
- the dewatering of the paper stock may be carried out batchwise or continuously on a paper machine.
- paper products sized as paper, paperboard or cardboard are obtained, which have a weight per unit area of, for example, 20 to 400 g / m 2 , preferably 40 to 220 g / m 2 .
- the dewatering of the paper stock is preferably carried out additionally in the presence of a retention agent.
- a retention agent in addition to anionic retention aids or nonionic retention aids such as polyacrylamides, cationic polymers are preferably used as retention aids and as drainage aids. This achieves a significant improvement in the runnability of the paper machines.
- cationic retention agents one can use all commercially available products. These are, for example, cationic polyacrylamides, polydiallyldimethylammonium chlorides, high molecular weight polyvinylamines, high molecular weight polyvinylamines having K values of more than 150, polyethyleneimines, polyamines having a molecular weight of more than 50,000, modified polyamines grafted with ethyleneimine and optionally crosslinked , Polyetheramides, polyvinylimidazoles, polyvinylpyrrolidines, polyvinylimidazolines, polyvinyltetrahydropyrines, poly (dialkylaminoalkylvinylethers), poly (dialkylaminoalkyl (meth) acrylates) in protonated or in quaternized form as well as polyamidoamines from a dicarboxylic acid such as adipic acid and polyalkylenepolyamines such as diethylenetriamine grafted with ethyleneimine and crosslinked with Poly
- retention aids are so-called microparticle systems of cationic polymers such as cationic starch and finely divided silica or of cationic polymers such as cationic polyacrylamide and bentonite.
- the cationic polymers used as retention aids have, for example, K-values according to Fikentscher of more than 150 (as determined in 5% skyssri- ger sodium chloride solution at a polymer concentration of 0.5 wt .-%, a temperature of 25 0 C and a pH of 7). They are preferably used in amounts of from 0.01 to 0.3% by weight, based on dry cellulose fibers.
- adjuvants known to those skilled in the literature may be added to the stock prior to sheet formation. These are, for example, fixing agents, solidifiers and defoamers.
- the present invention relates to the use of the paper sizing agent according to the invention as a sizing agent for the production of paper, cardboard and cardboard.
- the percentages in the examples are percent by weight.
- the K values were determined according to H. Fikentscher, Cellulose-Chemie, Vol. 13, 58-64 and 71-74 (1932) in 5% aqueous common salt solution at a temperature of 25 ° C. and a pH of 7 determined at a polymer concentration of 0.5 wt .-%.
- the average particle diameter of the dispersed particles of the polymer dispersions was determined both by Fraunhofer diffraction with a Coulter device of the type LS 230 with a small volume module and by electron microscopy.
- the viscosities were determined using a Brookfield viscometer at a temperature of 22 ° C.
- the ink buoyancy time (measured in minutes) is the time required for a test ink according to DIN 53 126 to 50% penetration through a test sheet.
- the water absorption is given in g / m 2 .
- edge penetration The paper sheet is coated on both sides with an adhesive tape streak-free. Then strips are cut with the dimensions 25 x 75 mm. These test strips are immersed in a 30% hydrogen peroxide bath at 70 ° C. or in a 3% lactic acid bath at 25 ° C. The edge penetration is determined by differential weighing of the dry test strips and the dip in the bath test strip.
- the mixture was heated 30 parts by weight of a 5 wt .-% solution of a cationic starch (with N, N-dimethylaminoethyl modified starch, DS 0.1) at 95 0 C, stirred for 5.7 parts by weight of a 5 wt. -% solution of naphthalenesulfonic acid-formaldehyde condensate sodium salt, mixed with 19.3 parts by weight of water and then added with 20 parts by weight of a melt of C 16 -C 18 -Alkylketendimer with a temperature of 90 0 C. . to the resulting emulsion were added 25 parts by weight of a 12 wt .-% aqueous solution of polyvinylamine 1 at 90 0 C.
- the mixture was homogenized by means of a high-pressure homogenizer at 100 bar and 75 0 C in two passes and cooled rapidly with ice.
- the dispersion obtained had a viscosity of 80 mPas (22 0 C) and an average particle size of 1, 3 .mu.m. After storage for 4 weeks at 40 ° C., the dispersion had a viscosity of 120 mPas.
- Example 2 Example 1 was repeated except that the solution of the naphthalenesulfonic acid-formaldehyde condensate sodium salt and then the polyvinylamine 1 was added first to the cationic starch solution initially charged. The mixture was mixed with the melt of the alkyl ketene dimer.
- the dispersion obtained had a viscosity of 100 mPas (22 0 C) and an average particle size of 1, 5 .mu.m. After storage for 4 weeks at 40 ° C., the dispersion had a viscosity of 180 mPas.
- Example 1 was repeated except that the solution of the cationic starch initially introduced was first the solution of the polyvinylamine 1 and then the naphthalenesulfonic acid-formaldehyde condensate sodium salt. The mixture was mixed with the melt of the alkyl ketene dimer.
- the dispersion obtained had a viscosity of 250 mPas (22 0 C) and an average particle size of 2.5 microns. After 4 weeks of storage at 40 0 C, the dispersion was coagulated and solid.
- Example 1 was repeated except that 22 parts by weight of an 18% strength by weight solution of polyvinylamine 2 was used instead of polyvinylamine 1.
- the dispersion obtained had a viscosity of 150 mPas (22 0 C) and an average particle size of 1, 4 .mu.m. After storage for 4 weeks at 40 ° C., the dispersion had a viscosity of 300 mPas.
- Example 4 was repeated, but adding the solution of polyvinylamine 2 after homogenization and cooling.
- the dispersion obtained had a viscosity of 250 mPas (22 0 C) and a mean particle size of 2.8 microns. After 4 weeks of storage at 40 0 C, the dispersion was solid.
- the mixture was homogenized by means of a high-pressure homogenizer at 100 bar and 75 0 C in two passes and cooled rapidly with ice.
- the dispersion obtained had a viscosity of 50 mPas (22 0 C) and an average particle size of 1, 4 .mu.m. After storage for 4 weeks at 40 ° C., the dispersion had a viscosity of 130 mPas.
- the mixture was heated, 52.3 parts by weight of deionized water at 90 0 C, stirred for 5.7 parts by weight of a 5 wt .-% solution of naphthalenesulfonic acid Formaldehydkondensat- sodium salt, and then mixed with 22 parts by weight of a 18 Wt .-% solution of polyvinylamine 2.
- the 90 0 C hot mixture was added 20 parts by weight of a melt of C 16 -C 18 -Alkylketendimer with a temperature of 90 0 C and emulsified with a high speed stirrer.
- the mixture was homogenized by means of a high-pressure homogenizer at 100 bar and 75 0 C in two passes and cooled rapidly with ice.
- the dispersion obtained had a viscosity of 40 mPas (22 0 C) and an average particle size of 0.9 .mu.m. After storage for 4 weeks at 40 ° C., the dispersion had a viscosity of 900 mPas.
- Comparative Examples 3 and 5 show that no stable dispersion is obtained when the nitrogen-containing polymer is charged (Comparative Example 3) or added after the dispersing step (Comparative Example 5).
- Comparative Examples 6 and 7 show the viscosity increase of dispersions which are not nitrogen-containing polymer (Comparative Example 6) or contain no cationic starch (Comparative Example 7) at 4 weeks storage at 40 ° C.
- the sheet was then dried on a steam-heated drying cylinder at a temperature of 90 0 C to a water content of 7%. Immediately after drying, the Cobb value of the leaves was determined. The leaves were then stored for 24 hours at 25 ° C and a relative humidity of 50%. The measurements were then repeated. The results obtained are shown in Table 1.
- the blends were then processed on a Rapid-Kothen sheet former into a sheet having a basis weight of 150 g / m 2 .
- the sheet was then dried on a steam-heated drying cylinder at a temperature of 90 0 C to a water content of 7%.
- the leaves were coated from both sides with an adhesive tape streak-free. From the leaves strips were cut with the dimensions 25 x 75 mm.
- the test strips were placed in a 30% hydrogen peroxide bath at 70 ° C. The edge penetration was de determined by differential weighing. The results obtained are shown in Table 3.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP05816209A EP1819876B1 (de) | 2004-11-29 | 2005-11-29 | Papierleimungsmittel |
CA2587527A CA2587527C (en) | 2004-11-29 | 2005-11-29 | Paper size comprising cationic starch and linear polymer having basic nitrogen atoms |
DE502005010891T DE502005010891D1 (de) | 2004-11-29 | 2005-11-29 | Papierleimungsmittel |
CN2005800409671A CN101068986B (zh) | 2004-11-29 | 2005-11-29 | 纸施胶剂 |
US11/720,362 US8512520B2 (en) | 2004-11-29 | 2005-11-29 | Paper sizing agent |
AT05816209T ATE496172T1 (de) | 2004-11-29 | 2005-11-29 | Papierleimungsmittel |
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US63117104P | 2004-11-29 | 2004-11-29 | |
US60/631,171 | 2004-11-29 |
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WO2006058711A2 true WO2006058711A2 (de) | 2006-06-08 |
WO2006058711A3 WO2006058711A3 (de) | 2006-09-28 |
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PCT/EP2005/012750 WO2006058711A2 (de) | 2004-11-29 | 2005-11-29 | Papierleimungsmittel |
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US (1) | US8512520B2 (de) |
EP (1) | EP1819876B1 (de) |
CN (1) | CN101068986B (de) |
AT (1) | ATE496172T1 (de) |
CA (1) | CA2587527C (de) |
DE (1) | DE502005010891D1 (de) |
ES (1) | ES2359072T3 (de) |
PT (1) | PT1819876E (de) |
WO (1) | WO2006058711A2 (de) |
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WO2007141197A1 (de) * | 2006-06-09 | 2007-12-13 | Basf Se | Wässrige alkylketendimer-dispersionen |
WO2011015280A1 (de) * | 2009-08-06 | 2011-02-10 | Bk Giulini Gmbh | Leimungsmittel für papier |
CN105297433A (zh) * | 2015-10-30 | 2016-02-03 | 成都新柯力化工科技有限公司 | 一种石膏纤维柔性改性剂及其制备方法 |
DE102011101222B4 (de) | 2010-05-11 | 2022-12-01 | Cs Compact System Gmbh | Verfahren zur Emulgierung von Leimungsmitteln für die Papierherstellung, Verwendung von Polymeren sowie emulgierbereite Mischung |
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WO2005121201A1 (de) * | 2004-06-08 | 2005-12-22 | Basf Aktiengesellschaft | Amphiphile polymerzusammensetzungen und ihre verwendung |
CN101568687B (zh) * | 2006-12-20 | 2012-06-27 | 巴斯夫欧洲公司 | 纸施胶剂混合物 |
AT506695B1 (de) * | 2008-11-14 | 2009-11-15 | Kemira Chemie Ges Mbh | Zusammensetzung zur papierleimung |
KR101753436B1 (ko) * | 2009-12-18 | 2017-07-03 | 솔레니스 테크놀러지스 케이맨, 엘.피. | 종이 사이징 조성물 |
AU2011237628B2 (en) * | 2010-04-07 | 2013-09-19 | Solenis Technologies Cayman, L.P. | Stable and aqueous compositions of polyvinylamines with cationic starch, and utility for papermaking |
AT512143B1 (de) * | 2011-11-08 | 2013-12-15 | Chemiefaser Lenzing Ag | Cellulosefasern mit hydrophoben Eigenschaften und hoher Weichheit und der dazugehörige Herstellungsprozess |
WO2014132175A1 (en) * | 2013-03-01 | 2014-09-04 | Basf Se | Aqueous emulsion of a sizing agent |
CA2907078C (en) * | 2013-03-15 | 2021-06-29 | Dober Chemical Corp. | Dewatering compositions and methods |
CN104963240B (zh) * | 2015-06-12 | 2017-03-22 | 金东纸业(江苏)股份有限公司 | 一种涂布纸的制造方法及涂布纸 |
CN105061774B (zh) * | 2015-09-22 | 2017-10-17 | 东乡县鹤达实业有限公司 | 一种造纸增强剂及其制备方法 |
CN110894698A (zh) * | 2018-09-12 | 2020-03-20 | 上海昶法新材料有限公司 | 一种阳离子型施胶剂及其制备方法和应用 |
US12000090B2 (en) | 2020-12-04 | 2024-06-04 | Agc Chemicals Americas, Inc. | Treated article, methods of making the treated article, and dispersion for use in making the treated article |
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- 2005-11-29 CN CN2005800409671A patent/CN101068986B/zh active Active
- 2005-11-29 CA CA2587527A patent/CA2587527C/en active Active
- 2005-11-29 US US11/720,362 patent/US8512520B2/en active Active
- 2005-11-29 AT AT05816209T patent/ATE496172T1/de active
- 2005-11-29 EP EP05816209A patent/EP1819876B1/de active Active
- 2005-11-29 DE DE502005010891T patent/DE502005010891D1/de active Active
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Also Published As
Publication number | Publication date |
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WO2006058711A3 (de) | 2006-09-28 |
ATE496172T1 (de) | 2011-02-15 |
EP1819876B1 (de) | 2011-01-19 |
PT1819876E (pt) | 2011-03-07 |
CN101068986B (zh) | 2012-10-17 |
ES2359072T3 (es) | 2011-05-18 |
CN101068986A (zh) | 2007-11-07 |
US20080041546A1 (en) | 2008-02-21 |
CA2587527C (en) | 2015-04-28 |
EP1819876A2 (de) | 2007-08-22 |
US8512520B2 (en) | 2013-08-20 |
CA2587527A1 (en) | 2006-06-08 |
DE502005010891D1 (de) | 2011-03-03 |
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