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
  • D21H17/03—Non-macromolecular organic compounds
  • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
  • D21H17/14—Carboxylic acids; Derivatives thereof
• • 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
  • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
  • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
• • 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
  • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
  • D21H17/56—Polyamines; Polyimines; Polyester-imides
• • 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
  • D21H21/22—Agents rendering paper porous, absorbent or bulky

Definitions

• volume is a key value-determining factor in paper and board, and a higher volume can be used to produce lighter materials and increased stiffness (modulus of elasticity) materials.
• the volume, along with the strength and stiffness of a paper, also has a positive impact on its printability and end users often find voluminous papers more valuable compared to less bulky papers.
• a classic method of increasing the volume of paper and cardboard is the addition of groundwood pulp. Rising wood costs have, however, also markedly increased the price of groundwood, so that chemical products for increasing the volume of paper and cardboard have once again become the focus of interest.
• Tissue papers contain a desired softer feel by increasing the volume.
• Hydrous emulsions however, have the disadvantage that stability problems often occur and the active ingredients are present in dilute form, which results in high transport costs and large volumes must be handled in the process.
• Chemical products for increasing volume are used in particular for laminating paper and paperboard for bookbinding boards and sleeve paper on waste paper basis, whereby high quality waste paper types are used with a high proportion of wood pulp and the products have a structure of one layer.
• This object is achieved by the use of a condensation product of fatty acid and amine-functional compound, a product of the condensation product which is at least partially quaternized by alkylation or a mixture thereof for increasing the volume of paper or paperboard.
• condensation products of fatty acid and amine-functional compound as well as alkylated or partially quaternized products of the condensation products or mixtures of condensation products and their quaternized products a very good volume increase of paper and cardboard can be achieved. It is particularly surprising that these compounds lead in the paper or board production process to a very strong dewatering of the papers or cardboard boxes, whereby higher production speeds can be achieved and the energy costs can be reduced.
• the condensation products and their quaternized products have the further advantage that they generally have a good water solubility and therefore can be used easily in papermaking processes.
• the condensation products and their quaternized products are simple and inexpensive to produce.
• condensation products of fatty acid and amine-functional compounds are understood to mean the reaction products of a condensation reaction of fatty acid and amine-functional compound, a fatty acid and an amine-functional compound combining to form a molecule with the exit of a water molecule.
• the condensation products can be obtained by reacting fatty acids or activated derivatives thereof, for example carboxylic acid chlorides, with the amine functional compounds.
• a fatty acid or mixtures of different fatty acids can be reacted with an amine-functional compound or with a mixture of several amine-functional compounds. It is preferable, even from a cost point of view, to react the fatty acids directly with the amine-functional compounds without prior derivatization, preferably with heating.
• amide formation between the carboxylic acid group of the fatty acid and an amino group of the amine-functional compound or in the case of the use of amino alcohols as the amine-functional compound, usually also at least partial esterification instead.
• the resulting water of reaction is advantageously removed from the process in the course of the reaction, for example by distilling off.
• the quaternized products of the condensation products are obtained by reaction with alkylating agents, wherein the amine and / or amide groups of the condensation products are at least partially alkylated until quaternization, that is, alkyl ammonium compounds of the condensation products are formed. In these alkylammonium compounds, the amino groups may be partially or completely alkylated to ammonium groups.
• the quaternized products are in the form of salts. Suitable anions are all common anions, for example chlorides, hydrogen sulfates, sulfates or carbonates. Suitable alkyl groups are, in particular, C 1 -C 10 -alkyl radicals, preference being given to methyl, ethyl, propyl and butyl radicals. Quaternized products are particularly preferably used by methylation.
• a preferred methylating agent is dimethyl sulfate.
• fatty acids are understood as meaning saturated or unsaturated aliphatic monocarboxylic acids having a branched or preferably unbranched carbon skeleton. Preference is given to C 8 - to C 30 -fatty acids, particularly preferably C 12 - to C 24 -fatty acids.
• Examples of fatty acids preferably used according to the invention are palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, palm oil fatty acid and coconut oil fatty acid.
• amino-functional compounds compounds containing at least one amino group, wherein the amino group may be a primary, secondary or tertiary amino group.
• the amine-functional compound may contain, in addition to the at least one amino group, further functional groups, in particular amide groups, hydroxyl groups and / or ether groups, preferably polyether groups.
• Preferred amine-functional compounds are amines, amidamines and amino alcohols, which may optionally contain further functional groups, for example ether groups, in particular polyether groups. Particular preference is given to monoamines, diamines, polyamines, polyamideamines, amino alcohols, polyalkylene oxide amines and / or polyether amines.
• condensation products of fatty acid and monoamine, diamine, polyamine, polyamidoamine, aminoalcohol, polyalkylenoxideamine and polyetheramine which are preferably used according to the invention are fatty acid amides, fatty acid amidamines or fatty acid ester amines which may optionally additionally contain free hydroxyl groups and / or polyether groups, or mixtures thereof.
• fatty acid amides, fatty acid amide amines, fatty acid ester amines, alkylammonium compounds of the fatty acid amides, fatty acid amide amines or fatty acid ester amines or mixtures thereof are used to increase the volume of paper or board. It is further preferred that the condensation products and / or their quaternized products are used in the form of an agent, the agent consisting of fatty acid amides, fatty acid amide amines, fatty acid ester amines and / or their alkylammonium compounds.
• At least partially quaternary alkylammonium groups (RR'R “R”'N + Y - ), in which R, R', R “and R '" independently of one another are C 1 -C 4, are used in the at least partially quaternized products of the condensation products Are 10 -alkyl radicals, preferably methyl, ethyl, propyl or butyl, wherein one or more of the radicals on the ammonium group have been introduced by alkylation and Y - is a counterion, for example the counterion of the methylating agent.
• the compounds to be used according to the invention ie the condensation products of fatty acid and amine-functional compound and alkylated by at least partially quaternized products thereof, are particularly suitable for increasing the volume of waste paper, since the otherwise in the processing of waste paper to Achieving sufficient strength and bulkiness required additions of wood pulp or groundwood can be completely eliminated, which makes the processing of waste paper can be simplified and also significantly cheaper.
• the compounds are therefore used to increase the volume of waste paper.
• Waste paper is usually understood as meaning both used paper and cardboard.
• group 1 lower varieties
• group 2 medium varieties
• group 3 better varieties
• starchy varieties group 4
• Special grades are also assigned to group 5. These groups are subdivided according to their quality into further subgroups, for example groups 1.01 to 1.11 and groups 2.01 to 2.12.
• the compounds to be used according to the invention for increasing the volume of low-wood, low-grade recovered paper grades, in particular groups 1 and 2 mentioned above, to increase the volume of pulp-containing, already recycled waste paper grades and deinked waste paper.
• these waste paper grades a significant increase in volume could be achieved with the use according to the invention without a significant drop in strength. If paper or cardboard wood pulp is added to increase the volume, surprisingly, the volume could be increased significantly without loss of strength using the inventive use when using low-grade waste paper grades.
• the condensation products described and / or their quaternized products are used in the form of a means for increasing the volume of paper or cardboard, wherein the agent is at least 90 wt .-%, more preferably at least 95% by weight and most preferably at least 98% by weight of condensation products of one or more fatty acids and one or more amine functional compounds and / or alkylated products containing at least partially quaternized products of the condensation products. It is also preferred that the agent contains less than 10% by weight of water, preferably less than 5% by weight, more preferably less than 3% by weight, and most preferably less than 1% by weight of water.
• the agent may contain solvents, in particular glycols, for example mono-, di-, tri- and / or polyglycols, in particular mono-, di-, tri- and / or polyethylene glycols.
• the agent contains at least 90% by weight, more preferably at least 95% by weight and most preferably at least 98% by weight of fatty acid amides, fatty acid amide amines, fatty acid ester amines and / or alkyl ammonium compounds thereof. Due to the high content of active ingredients only comparatively small amounts of the means for increasing the volume must be used in this way, whereby the process control is simplified and the transport costs are low. In addition to the emulsions of active compounds frequently used in the prior art, the high content of active ingredients also ensures very good storage stability.
• the invention also relates to a method for increasing the volume of paper or cardboard, wherein in the paper or board production process to increase the volume, a condensation product of a fatty acid and an amine-functional compound, an alkylated by at least partially quaternized product of the condensation product or a mixture thereof is added.
• the compounds for increasing the volume are preferably added to the paper stock, and it is particularly preferred to add the compounds to the paper stock in front of the headbox.
• composition or the condensation products to be used according to the invention or their products which are at least partially quaternized by alkylation may be used in amounts of from 0.05 to 2% by weight, preferably from 0.1 to 0.8% by weight, based on the paper stock. %, in particular 0.2 to 0.6 wt .-% are used.
• the products to be used according to the invention can also be used in combination with known bulking agents and other excipients or auxiliary reagents.
• the means for volume enlargement to be used according to the invention can be used undiluted or in dilute form for use, the undiluted use being preferred.
• the invention further relates to paper or board containing a condensation product of a fatty acid and an amine-functional compound and / or an alkylated by at least partially quaternized product of the condensation product.
• the paper or board preferably contains the condensation products preferred in connection with the use according to the invention and / or their quaternized products, and the preferred amounts of 0.05-2% by weight, preferably 0.1-0.8% by weight, described above. %, in particular 0.2-0.6 wt .-%, based on the paper or cardboard.
• the respective paper mix was fiberized with an Escher-Wyss pulper to a 4% stock pulp.
• the stock was added to the product to increase the volume in the specified amount.
• the sheet formation was carried out in a Rapid-Köthen type former, and the obtained paper sheet was dried by a MK-sheet former dryer. After drying, the specific volume and the breaking force index of the papers produced were determined and from this the percentage change was determined in comparison with the blank sample. The results are shown in Tables 1 to 4 below.
• Table 1 Volume increase of deinked paper example Product used to increase the volume Amount used [wt .-%] paper blend Basis weight [g / m 2 ] Thickness [ ⁇ m] Specific volume [cm 3 / g] [cm 3 / g] Change in specific volume compared to example 0 [%] Breaking force index [Nm / g] Change in breaking load index compared to example 0 [%] 0 - - Deinkingware (variety 1.11) 137.0 256.4 1.87 - 35.4 - V1 wood pulp 4.0 - 137.7 264.1 1.92 2.5 31.4 -11.3 V2 wood pulp 8.0 - 136.9 270.2 1.97 5.5 27.8 -21.5 1 Product A 0.3 Deinkingware (variety 1.11) 136.6 273.5 2.00 7.0 33.1 -6.5 2 ProductA 0.5 Deinkingware (variety 1.11) 137.1 280.9 2.05 9.5 31.6 -10.7 example Product used to increase the volume Amount used [wt .-%] paper blend Basis

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Citations (3)

• 2007
  • 2007-09-20 EP EP07018478A patent/EP2048282A1/fr not_active Withdrawn

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