Method of paper smoothing

FIELD: mining industry and mechanical engineering.

SUBSTANCE: the invention is dealt with methods of production of a paper, in particular, with its smoothing. The water suspension containing cellulose fibers and optional fillers (i) add the sizing dispersion containing a sizing agent and a polymer including one or several aromatic groups and (ii) a sizing promoter containing a polymer intercalating one or several aromatic groups. Mould and dry the produced suspension. The sizing dispersion and sizing promoter are added to the water suspension separately. The invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

EFFECT: the invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

41 cl, 6 tbl, 6 ex

 

The present invention relates to a method for smoothing paper which comprises adding to a suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, as well as dressing material for promoter containing polymer that includes one or more aromatic groups; forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

Background of the invention

Dispersion or emulsion dressing material for agents used for receiving paper to make paper and cardboard increased resistance to wetting and penetration of liquids. Dressing material for dispersion usually added to the aqueous suspension containing cellulosic fibres, and optional fillers and various additives. The aqueous suspension is served in the pressure vessel, eject the suspension on the grid, which produce a wet layer of paper. Further to the suspension, as a rule, add compounds such as starches and fine materials that facilitate dehydration of the suspension on the grid. In the process of getting paper water drained from the grid and purified from the fibrous mass, the so-called white water, usually subjected to partial recircula the AI. The pulp suspension contains a certain amount of fibrous material, for example, fillers, charged polymers, dressing material for agents, and a variety of charged impurities, i.e. anionic wastes, electrolytes, colloidal substances, etc. Some fibrous material has an impact on the effectiveness of smoothing, in all probability, weakening it. A large number of charged compounds, such as high content of salts in suspension results in suspension, which significantly complicates the dressing, i.e. the production of paper with a satisfactory sizing properties. Other compounds contained in the suspension, worsening the dressing are lipophilic, wood, extractable substances contained in recycled fibres and cellulose with a high yield, i.e. mechanical pulp. The increased number of added dressing material for agent often improves the dressing, but it causes an increase in cost, and increased accumulation of dressing material for agents in purified from fibrous mass of water. The accumulation of fibrous material, as well as any other component present in the suspension, even stronger in the mills, in which purified from fibrous mass of water is subjected to active recircu is acii, introducing in the process of obtaining paper only a small amount of fresh water. Thus, the aim of the present invention is a further improvement of the smoothing. Another objective of the present invention is to improve the smoothing by adding a dressing material for substances to the pulp suspensions having high conductivity and/or contain a large number of lipophilic wood extractables. The following objectives will be specified below.

WO 99/55964 relates to a method for producing paper, in which the drying and retaining means is added to the suspension containing cationic or amphoteric polysaccharide, comprising a hydrophobic group. The polysaccharide may be used in combination with anionic, fine materials and dressing material for agents.

WO 99/55965 relates to a method for producing paper, in which the drying and retaining means is added to the suspension containing cationic organic polymer comprising an aromatic group. Cationic organic polymer, respectively, used in conjunction with anionic fine materials.

U.S. patent 6001166 relates to aqueous dispersions of acidication containing cationic starch and anionic dispersants, such as ligninsulfonate acid, condensates naphtalenesulfonic acid and formaldehyde.

WO 9833979 describing the t water dispersion of pulp and dressing material for reactive agents, including cationic organic compounds and anionic stabilizers.

Description of the invention

It was found that the invention in accordance with the attached claims unexpectedly improves the dressing in General and specifically improves the dressing aqueous suspension containing cellulosic fibers having high conductivity. More specifically, this invention relates to a method for smoothing paper which comprises adding to a suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, and dressing material for promoter containing polymer that includes one or more aromatic groups, forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

Dressing material for the agent contained in the dispersion in accordance with the present invention, added to the suspension, it is a dressing material for any known agent, such as mecellose-reactive agents, including rosin, for example, reinforced and/or esterified rosin, waxes, fatty acids and derivatives of resin acids, such as fatty amides and complex fatty esters, such as clonetrooper natural glycerin fatty acid, and/or pulp and reactive agents. Dressing material for the dispersion preferably contains pulp-dressing material for reactive agents. Pulp-dressing material for reactive agents contained in dressing material for dispersion may be selected from any pulp-reactive agents known in this field. Dressing material for the agent, it is selected from hydrophobic ketene dimer, multimers of ketene, acid anhydrides, organic isocyanates, carbamoylation and their mixtures, preferably of ketene dimer and anhydrides of acids, most preferably of ketene dimer. Suitable ketene dimers have the following General formula (I)in which R1and R2represent a saturated or unsaturated hydrocarbon group, typically saturated hydrocarbons, while hydrocarbon group, it is advisable have from 8 to 36 carbon atoms, typically an alkyl group with straight or branched chain, having from 12 to 20 carbon atoms, such as hexadecyl and octadecyl. The ketene dimer can be liquid at ambient temperature, for example at 25°C, preferably at 20°C. typically, the anhydrides of the acids have the following General formula (II)in which R3and R4may be the same or different and represent saturated and the unsaturated hydrocarbon group, it is advisable containing from 8 to 30 carbon atoms, or R3and R4together with the residue-C-O-C - can form a 5-6-membered ring, optionally further substituted hydrocarbon groups containing up to 30 carbon atoms. Examples of commercially used acid anhydrides include succinic anhydrides of alkyl and alkenyl, and, in particular, succinic anhydride isooctadecyl.

Suitable ketene dimers, acid anhydrides, organic isocyanates include compounds described in U.S. patent No. 4522686 included in this description by reference. Examples of suitable carbamoylation include carbamylcholine described in U.S. patent No. 3887427, also included in the description by reference.

Dressing material for the dispersion added to the suspension may contain from 0.1 to 50 wt.% dressing material for agent by weight of the total dispersion/emulsion, preferably more than 20 wt.%. A dispersion containing dressing material for the agents of the dimer of ketene may contain from 5 to 50 wt.% dimer of ketene by weight of the total composition, preferably from 10 to 35 wt.%. Dispersion or emulsion containing dressing material for the agents of the anhydrides of the acids may contain from 0.1 to 30 wt.% anhydride acid by weight of the total dispersion/emulsion, preferably from 1 to 20 wt.%. A dispersion containing mecellose-reactio nesposobnye dressing material for agents it is advisable to have the contents of the dressing material for agents constituting from 5 to 50 wt.%, preferably from 10 to 35 wt.%. The polymer having one or more aromatic groups, i.e. both anionic and cationic polymer having one or more aromatic groups contained in the dressing material for dispersion, it is present in amount of about 0.1 wt.% up to 15 wt.% of the mass of the dressing material for the agent.

The amount of dressing material for agent added to the aqueous suspension containing cellulosic fibers, may be from 0.01 to 5 wt.%, suitable from 0.05 to 1.0 wt.% calculated on dry weight of cellulosic fibres and optional fillers, if the dose depends on the quality LightWave pulp or paper, dressing material for the agent and the degree of smoothing.

Dressing material for dispersion containing polymer comprising at least one aromatic group may be anionic or cationic, i.e. dispersing and/or stabilizing agents present in the dispersion, which can be called “dispersing system”, have a common anionic or cationic charge, respectively. The dispersion system may include any agent that facilitates the formation of a dispersion or emulsion, such as dispersing and/or stabilizing agents, examples of which can serve as polyelectrolyte is s, surfactants and electrolytes. Anionic water-dressing material for dispersion may include cationic compounds, i.e. cationic polyelectrolytes (cationic or amphoteric polyelectrolytes with a total cationic charge), and/or cationic surfactants, and/or any other cationic compound known specialist, provided that the total charge of the dispersing system is anionic. On the other hand, the cationic water-dressing material for dispersion may include anionic compounds, i.e. anionic polyelectrolytes (anionic or amphoteric polyelectrolytes with total anionic charge), and/or anionic surfactants, and/or any other anionic compound known specialist, provided that the total charge of the dispersing system is anionic. Anionic or cationic charge of the dressing material for dispersion can be determined using a ZetaMaster S, version PCS.

In accordance with the present invention a method, comprising adding to the aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, and dressing material for promoter containing polymer that includes one or more aromatic groups, while the variance and dressing material for the promoter EXT the keys to the suspension separately. The polymer containing one or more aromatic groups may be uncharged or charged, it is charged, i.e., the polymer may be cationic or anionic, such as amphoteric and having an overall anionic or cationic charge. The polymer may be organic, it is advisable derived from natural sources, such as polysaccharides, e.g. starches, Gurovich gums, cellulose, chetinov, chitosans, glycans, galactanes, glucans, xanthan gums, pectins, mannans, dextrins, preferably starches and Gurovich gums, suitable starches such as potato starch, corn starch, starches from wheat, tapioca, rice, waxy maize, oat, etc.; or synthetic, such as polymers with increasing chain, for example, vinyl-additive polymers, such as polymers based on acrylate, acrylamide and vinylamide and stepped polymers, such as polyurethanes. It is advisable to use an organic polymer selected from polysaccharides, i.e. starches, and vinyl addition polymers, such as polymers based on acrylamide.

The aromatic group of the polymer may be present in the base polymer or, preferably, an aromatic group can be a side group attached to the base polymer or the continuing thereof, or running the SQL in the side group, attached to the base polymer or continuing from it (the primary circuit). A suitable polymer is an organic polymer having a common anionic or cationic charge.

Dressing material for the polymer, it includes an additional polymer containing one or more aromatic groups, which represents any of the above groups. It is advisable that the total charge of the two polymers comprising at least one aromatic group contained in the dressing material for the promoter, was positive, and they are usually added to aqueous suspensions separately. The polymer or both of the polymer contained in the dressing material for the promoter, preferably include an aromatic group, provided that the polymer or polymers do not contain melamine or its derivatives.

In accordance with the present invention dressing material for dispersion containing polymer that includes one or more aromatic groups, and dressing material for the promoter-containing first polymer comprising one or more aromatic groups, and, optionally, an optional second polymer comprising one or more aromatic groups, is added to aqueous suspensions separately. Separate the adding means dressing material for dispersion and dressing material for the promoter is added to the pulp suspension (liquid weight) in different places is either essentially in one place, but at different times. Moreover, if dressing material for the promoter contains two polymer including an aromatic group, it is also advisable to add separately.

In accordance with one of the preferred variants of the embodiment of the present invention relates to a method for smoothing paper, comprising adding to the aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing polymer that includes one or more aromatic groups, suitable cationic organic polymer that includes one or more aromatic groups and/or anionic polymer comprising one or more aromatic groups, and the anionic polymer is a stage polymer, polysaccharide, or natural aromatic polymer, more preferably an anionic polymer comprising an aromatic group, representing a step polymer or natural aromatic polymer; as well as dressing material for promoter containing polymer that includes one or more aromatic groups and a cationic organic polymers, comprising one or more aromatic groups, such as cationic polysaccharide or a cationic vinyl-additive polymer and anionic polymer comprising one or more aromatic groups, represent the influencers step-like polymer, the polysaccharide or natural aromatic polymer, it is advisable step polymer or natural aromatic polymer such as a polymer obtained by condensation of naphthalenesulfonate, polymer polystyrenesulfonate or modified polymer lignin, shaping and drying the resulting suspension; in which dressing material for dispersion and dressing material for the promoter added separately.

In accordance with a preferred embodiment of the present invention a method of smoothing the paper comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent, a cationic organic polymer that includes one or more aromatic groups and/or anionic polymer comprising one or more aromatic groups, and the anionic polymer is a stage polymer, polysaccharide, or natural aromatic polymer, more preferably an anionic polymer comprising one or more aromatic groups representing a step polymer or natural aromatic polymer, and dressing material for promoter containing cationic organic polymer, includes one or more aromatic groups, and anionic polymer comprising one or more aromatic groups, wybran the x speed of polymers, polysaccharides and natural aromatic polymer; forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

In accordance with another preferred embodiment of the present invention a method of smoothing the paper comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent and anionic polymer comprising one or more aromatic groups representing a stage polymer, polysaccharide, or natural aromatic polymer, the amount added to the suspension dressing material for dispersion is from about 0.01 to 5.0 wt.% based on the weight of the dressing material for agent based on dry fibers, and dressing material for promoter containing cationic polymer comprising one or more aromatic groups, and anionic polymer comprising one or more aromatic groups, it represents a cationic polysaccharide or a cationic vinyl-additive polymer, more preferably a cationic polysaccharide and an anionic polymer comprising one or more aromatic groups representing a stage polymer, polysaccharide, or natural aromatic polymer, PR is the number of cationic polymer, added to the suspension, is approximately from 0.001 to 3 wt.% calculated on dry fiber, and the amount of anionic polymer added to the suspension, is approximately from 0.001 to 3 wt.% calculated on the dry fiber; forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

In accordance with another preferred embodiment of the present invention a method of smoothing the paper comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent and the cationic organic polymer that includes one or more aromatic groups, such as cationic polysaccharide or a cationic vinyl-additive polymer, suitable cationic polysaccharide and an anionic polymer comprising one or more aromatic groups representing a stage polymer, polysaccharide, or natural aromatic polymer, the amount added to the suspension dressing material for dispersion is from about 0.01 to 5.0 wt.% based on the weight of the dressing material for agent based on dry fibers, and dressing material for promoter containing cationic polymer comprising one or more aromatic groups, and anionic polymer, on the expectation by one or more aromatic groups, it is advisable represents a cationic polysaccharide or a cationic vinyl-additive polymer, more preferably a cationic polysaccharide and an anionic polymer comprising one or more aromatic groups representing a stage polymer, polysaccharide, or natural aromatic polymer, the amount of cationic polymer added to the suspension, is approximately from 0.001 to 3 wt.% calculated on dry fiber, and the amount of anionic polymer added to the suspension, is approximately from 0.001 to 3 wt.% calculated on the dry fiber; forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

In accordance with the following preferred embodiment of the present invention a method of smoothing the paper comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent, such as pulp and dressing material for reactive agent, and a cationic organic polymer including an aromatic group and/or anionic polymer comprising an aromatic group selected from the stepped polymers, polysaccharides, and natural aromatic polymers, and dressing material for the promoter content is the future of cationic polysaccharide, having structural formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, each of R1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion; or a vinyl-addition polymer obtained by cationic polymerization of the monomer or mixture of monomers comprising a cationic monomer represented by the General formula (II):

in which R1represents N or CH3; each of R2and R3is altergroup having from 1 to 3 carbon atoms, And1represents O or NH, IN1is akilagpa having from 2 to 8 carbon atoms, or hydroxypropylamino, Q is the Deputy comprising an aromatic group, and X-represents an anionic counterion; and anionic polymer that includes one aromatic group, representing stage polymer, polysaccharide, or natural aromatic polymer.

In accordance with another preferred embodiment of the present invention a method of smoothing the paper includes adding to the one of the suspension, containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent, a cationic organic polymer including an aromatic group and/or anionic polymer comprising aromatic groups and the anionic polymer is a stage polymer, polysaccharide, or natural aromatic polymer, more preferably an anionic polymer comprising an aromatic group, represents the step polymer or natural aromatic polymer, and dressing material for promoter containing cationic polysaccharide having the structural formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, each of R1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion, and anionic polymer comprising an aromatic group, representing stage polymer, in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

In accordance with the following preferred embodiment of the present invention a method of smoothing b the sorcerers comprises adding to the aqueous suspension, containing cellulosic fibres, and optional fillers, dressing material for dispersion containing dressing material for the agent, a cationic organic polymer that includes one or more aromatic groups and/or anionic polymer comprising one or more aromatic groups representing a stage polymer, polysaccharide, or natural aromatic polymer, and dressing material for promoter containing cationic vinyl-additive polymer obtained by cationic polymerization of the monomer or mixture of monomers comprising a cationic monomer represented by the General formula (II):

in which R1represents N or CH3; each of R2and R3is altergroup having from 1 to 3 carbon atoms, And1represents O or NH, IN1is akilagpa having from 2 to 8 carbon atoms, or hydroxypropylamino, Q is the Deputy comprising an aromatic group, and X-represents an anionic counterion, as well as anionic polymer comprising an aromatic group selected from the stepped polymers, polysaccharides, and natural aromatic polymers, in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

Anionic polymer that includes one or more aromaticheski the groups (forming part of the promoter and/or dispersion, suitable dispersion), preferably selected from the stepped polymers, polysaccharides, and natural aromatic polymers, provided that the anionic polymer is not a polymer obtained by condensation malminkartano acid. Typically, the anionic polymer is selected from polymers obtained by the condensation of naphthalenesulfonate, for example condensed naphthalenesulfonate, polymers polystyrenesulfonate and modified lignin polymers, such as ligninsulfonate. Most preferably the anionic polymer is a condensed naphthalenesulfonate or ligninsulfonate.

In accordance with the present invention dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately. Despite the fact that dressing material for dispersion may contain the same polymers as dressing material for the promoter, a significant improvement smoothing is observed only if the dressing material for the promoter and dressing material for the dispersion is added to the pulp suspension separately. Separate the adding means dressing material for the variance, which can contain any polymers dressing material for the promoter, and dressing material for the promoter is added to the mill for paper in different places or essentially in the same place but at different times. Moreover, the cationic organic floor the measures and anionic polymer, forming a dressing material for the promoter, it is also advisable to add separately. Anionic polymer comprising an aromatic group, a subset of the dressing material for the promoter is preferably added to the suspension after adding as a dressing material for dispersion and a cationic organic polymer.

Cationic polymer

Cationic organic polymer that includes one or more aromatic groups dressing material for the promoter, which may also be part of the dressing material for dispersion, can be obtained from natural or synthetic sources and may be linear, branched or Poperechnaya. Cationic polymer, preferably, may be soluble or dispersible in water. Examples of suitable cationic polymers include cationic polysaccharides, such as starches, guar gums, cellulose, chitina, chitosans, glikana, galactanes, glucans, xanthan gums, pectins, mannans, dextrins, preferably starches and guar gums, with suitable starches include starches from potato, corn, wheat, tapioca, rice, waxy maize, oat, etc.; cationic synthetic organic polymers, such as cationic polymers with increasing chain, for example cationic vinyl-additive polymers, such as polymers based on acrylate, acrylamide and vinylamide, as well as with the opencities cationic polymers, for example, cationic polyurethanes. Cationic organic polymers suitable selected from the group consisting of polysaccharides, i.e. starches and cationic vinyl-additive polymers, such as polymers based on acrylamide, which includes an aromatic group.

The aromatic group of the cationic organic polymer may be present in the base polymer or in a group-Deputy attached to its base (the main chain), preferably in the group-Deputy. Examples of suitable aromatic groups include aryl-, aralkyl and alcarinque, for example phenyl, phenylene, naphthyl, xylylene, benzyl and phenylethyl; preferably benzyl, nitrogen-containing aromatic (aryl) groups, for example, pyridine and chinoline, as well as derivatives of these groups. Examples of cation-charged groups that may be present in the cationic polymer and the monomers used to obtain the cationic polymer include Quaternary ammonium group, tertiary amino group and an acid additive salt.

In accordance with a preferred embodiment of the cationic organic polymer including an aromatic group selected from cationic polysaccharides. The aromatic group of the polysaccharide can be attached to the heteroatom like nitrogen or oxygen present in the polysaccharide, while GE is Euroatom not necessarily charged, for example, in the case when it is a nitrogen. The aromatic group can also be attached to a group that includes a heteroatom, for example, amide, complex or simple the ether, while these groups may be attached to the base of the polysaccharide (main chain), for example, through a chain of atoms. Examples of suitable aromatic groups containing an aromatic group include aryl - and Uralkaliy, for example phenyl, phenylene, naphthyl, xylylene, benzyl and phenylethyl; nitrogen-containing aromatic (aryl) groups, for example, pyridine and chinoline, as well as derivatives of these groups in which one or more of the substituents attached to these aromatic groups may be selected from hydroxyl, halogen, such as chloride, nitro - and hydrocarbon groups having from 1 to 4 carbon atoms.

Cationic organic polymer, preferably selected from cationic polysaccharides having the General structural formula (I):

in which R represents the residue of a polysaccharide; a is a group, attach N to the residue of the polysaccharide, it is advisable chain of atoms, including atoms and N and, optionally, the atoms and/or N, as a rule, akilagpa having from 2 to 18, suitable from 2 to 8 carbon atoms, optionally interrupted or substituted by one or a number of the mi heteroatoms, for example, O or N, for example, accelerograph or hydroxypropionate (-CH2-CH(OH)-CH2-); each of R1and R2represents H or, preferably, a hydrocarbon group, it is advisable alkyl having from 1 to 3 carbon atoms; R3it is advisable represents an aromatic hydrocarbon group, including Uralkaliy, for example benzyl and venlateshappa; n is an integer from about 2 to 300,000, suitable from 5 to 200,000 and preferably from 6 to 125,000, or, alternatively, R1, R2and R3together with N form an aromatic group containing from 5 to 12 carbon atoms; and X-represents an anionic counterion, typically a halide, such as chloride.

Cationic polysaccharide, a modified aromatic group may have a wide range of degree of substitution, the degree of cationic substitution (DSc) may be from 0.01 to 0.5, it is advisable from 0.02 to 0.3, preferably from 0.025 to 0.2; the degree of aromatic substitution (DSAr) may be from 0.01 to 0.5, it is advisable from 0.02 to 0.3, preferably from 0.025 to 0.2, and the degree of anionic substitution (DSA) can range from 0 to 0.2, suitable from 0 to 0.1, preferably from 0 to 0.05.

Polysaccharides can be obtained from cationic and aromatic modification of the polysaccharide in a known manner with which the label of one or more agents, including cationic and/or aromatic group, for example by the interaction of the agent with a polysaccharide in the presence of alkaline substances such as alkali metal or alkali earth metal hydroxide. Polysaccharide subjected to cationic and aromatic modifications may be nonionic, anionic, amphoteric or cationic.

Suitable modifying agents include non-ionic agents, such as, for example, aralkylated, for example benzylchloride and benzylbromide; the interaction products of epichlorohydrin and dialkylamino having at least one Deputy containing the above-mentioned aromatic group, including 3-dialkylamino-1,2-epoxypropane; and cationic agents such as, for example, the interaction product of epichlorohydrin and tertiary amines having at least one Deputy containing the above-mentioned aromatic group, including alaricdailey, such as dimethylbenzylamine; arylamine, such as pyridine and quinoline. Suitable cationic agents of this type include the halides 2,3-epoxypropyltrimethylammonium and halides of garagedoorsofamerica.com, for example chloride, N-(3-chloro-2-hydroxypropyl)-N-(hydrophobic alkyl)-N,N-di(lower alkyl)ammonium and chloride N-glycidyl-N-(hydrophobic alkyl)-N,N-di(lower alkyl)ammonium, in which the aromatic group are the same as above, especially ctil, decyl and dodecyl, and the lower alkyl represents methyl or ethyl; and halides of halohydrocarbon-N,N-dialkyl-N-alchilamoniu and chloride N-glycidyl-N-(alkaryl)-N,N-dialkylamide, for example chloride, N-(3-chloro-2-hydroxypropyl)-N-(alkaryl)-N,N-di(lower alkyl)ammonium, in which alcarinque and the group of lower alkyl are the same as defined above, in particular the chloride of N-(3-chloro-2-hydroxypropyl)-N-benzyl-N,N-dimethylammonio; and chloride of N-(3-chloro-2-hydroxypropyl)pyridinium. In General, when using non-ionic aromatic agent, a polysaccharide, it is advisable to turn into a cationic polysaccharide, applying before or after the hydrophobic modification of any of the cationic agents known in this field. Examples of suitable cationic and/or aromatic modifying agent, modified aromatic groups of the polysaccharides and methods for their preparation are described in U.S. patent No. 4687519 and 5463127; International publication WO 94/24169, in European patent No. 189935 and publishing S.P.Patel, R.G.Patel and V.S.Patel, Starch/Starke, 41(1989), No.5, pp.192-196, the contents of which are incorporated in this description by reference.

In accordance with another preferred embodiment of the cationic organic polymer is selected from homopolymers and copolymers derived from one or more monomers containing at least one monomer comprising aromatics the th group, suitable ethylene-unsaturated monomer. The cationic polymer can be razvetvlenno linear or branched. The aromatic group of the cationic polymer may be present in the base polymer or, preferably, it can be a side group attached to the base polymer or the continuing thereof, or be present in the side group attached to the base polymer or continuing it. Suitable aromatic (aryl) groups include groups containing optionally substituted by panelgroup, optionally substituted by familiegroep and optionally substituted by aftercrop, for example, a group having the General formula-C6H5- 6H4-, -C6H3and With6H2for example, in the form of phenylene (-C6H4-), xylylene (-CH2-C6H4-CH2-), phenyl (-C6H5), benzyl (-CH2-C6H5), Venetia (-CH2CH2-C6H5and substituted phenyl (e.g.,- C6H4-Y, -C6H3Y2and-C6H2Y3), in which one or more substituents (Y)attached to the phenyl ring, can be selected from hydroxyl, halogen, such as chloride, nitro - and hydrocarbon groups having from 1 to 4 carbon atoms.

The cationic polymer preferably represent what possessing a vinyl-additive polymer. The term “vinyl-additive polymer” in this description means a polymer obtained by addition polymerization of one or more vinyl monomers or ethylene-unsaturated monomers, including, for example, based monomers acrylamide and acrylate. Cationic polymer suitable chosen from cationic vinyl-addition polymers obtained by cationic polymerization of the monomer or mixture of monomers comprising a cationic monomer represented by the General formula (II):

in which R1represents N or CH3; each of R2and R3preferably, represents altergroup having from 1 to 3 carbon atoms, usually from 1 to 2 carbon atoms; And1represents O or NH, IN1is akilagpa having from 2 to 8 carbon atoms, typically from 2 to 4 carbon atoms, or hydroxypropylamino; Q is Deputy comprising an aromatic group, suitable phenyl or substituted panelgroup, which can be attached to the nitrogen by akilagpa, usually having from 1 to 3 carbon atoms, expediently from 1 to 2 carbon atoms, Q preferably represents benzerrou (-CH2-C6H5); and X-represents an anionic counterion, typically a halide, such as chloride. Examples of the approach is the total monomers, represented by the General formula (II)include Quaternary monomers, obtained by processing benzylchloride dialkylaminoalkyl(meth)acrylates, such as dimethylaminoethyl(meth)acrylate, diethylaminoethyl(meth)acrylate and dimethylaminopropyl(meth)acrylate, and dialkylaminoalkyl(meth)acrylamides, such as dimethylaminoethyl(meth)acrylamide, diethylaminoethyl(meth)acrylamide, dimethylaminopropyl(meth)acrylamide and diethylaminopropyl(meth)acrylamide. Preferred cationic monomers of the General formula (II) include Quaternary salts benzylchloride of dimethylaminoethylacrylate and dimethylaminoethylmethacrylate.

Cationic vinyl-additive polymer may be a homopolymer derived from a cationic monomer comprising an aromatic group, or a copolymer obtained from a mixture of monomers containing cationic monomer comprising an aromatic group and one or more copolymerizate monomers. Suitable copolymerizate non-ionic monomers include monomers represented by the General formula (III):

in which R4represents N or CH3; each of R5and R6represents H or a hydrocarbon group, it is advisable alkyl having from 1 to 6, suitable from 1 to 4, usually 1 to 2 carbon atoms; And2represents O or NH;25R6). Examples of suitable copolymerizate monomers of this type include (meth)acrylamide; monomers on the basis of acrylamide, such as N-alkyl(meth)acrylamide and N,N-dialkyl(meth)acrylamide, for example N-n-propylacetamide, N-isopropyl(meth)acrylamide, N-n-butyl(meth)acrylamide, N-isobutyl(meth)acrylamide and N-tert-butyl(meth)acrylamide; and dialkylaminoalkyl(meth)acrylamide, such as dimethylaminoethyl(meth)acrylamide, diethylaminoethyl(meth)acrylamide, dimethylaminopropyl(meth)acrylamide and diethylaminopropyl(meth)acrylamide; monomers, acrylate-based, such as dialkylaminoalkyl(meth)acrylates, such as dimethylaminoethyl(meth)acrylate, diethylaminoethyl(meth)acrylate, tert-butylaminoethyl(meth)acrylate and dimethylaminoethylmethacrylate; and vinylamide, for example N-vinylformamide and N-vinylacetate. Preferred copolymerizate nonionic monomers include acrylamide and methacrylamide, i.e. the (meth)acrylamide, with the base polymer preferably is a polymer based on acrylamide.

Suitable copolymerizate cationic monomers include monomers represented by the General formula (IV):

in which R7represents H or CH3; each of R8, R9and R10represents H or, preferably, a hydrocarbon group, it is advisable alkyl having from 1 to 3 carbon atoms, usually from 1 to 2 carbon atoms; And3represents O or NH;3is akilagpa having from 2 to 4 carbon atoms, suitable from 2 to 4 carbon atoms, or hydroxypropylamino and X-represents an anionic counterion, typically a methyl sulfate or halide, such as chloride. Examples of suitable cationic copolymerizate monomers include acid additive salts and Quaternary ammonium salts of the above-mentioned dialkylaminoalkyl(meth)acrylate and dialkylaminoalkyl(meth)acrylamides, usually obtained with the use of acids such as HCl, H2SO4etc. or quaternionic agents such as methyl chloride, dimethylsulfate etc.; and chloride of diallyldimethylammonium. Preferred copolymerizate cationic monomers include Quaternary salt of the methyl chloride dimethylaminoethyl(meth)acrylate and chloride of diallyldimethylammonium. Can also be used copolymerizate anionic monomers such as acrylic acid, methacrylic acid, various sulfonated, vinyl-additive monomers, etc. preferably in small amounts.

The cationic polymer may also be chosen from polymers resulting from the condensation reaction of one or more monomers comprising an aromatic group. Examples of such monomers include diisocyanates toluene, bisphenol a And phthalic acid, phthalic anhydride, etc. that can be used to obtain the cationic polyurethane, cationic of polyamidoamine etc.

Alternatively, the cationic polymer can be a polymer exposed aromatic modification with the use of an agent comprising an aromatic group. Suitable modifying agents of this type include benzylchloride, benzylbromide, chloride of N-(3-chloro-2-hydroxypropyl)-N-benzyl-N,N-dimethylammonio and chloride of N-(3-chloro-2-hydroxypropyl)pyridinium. Suitable polymers for so is th aromatic modifications include vinyl-additive polymers. If the polymer contains tertiary nitrogen, which can be stereoselectivity of the modifying agent, the use of such agents usually leads to the fact that the polymer becomes cationic. Alternatively, the polymer being an aromatic modifications may be cationic, for example cationic vinyl-additive polymer.

Typically, the charge density of the cationic polymer is from 0.1 to 6.0 mEq/g dry polymer, suitable from 0.2 to 4.0 and preferably from 0.5 to 3.0.

Srednevekovaja molecular weight synthetic polymers is typically at least approximately 500000, more appropriate than about 1,000,000 and preferably more than approximately 2000000. The upper bound does not matter; it can be about 50000000, usually 30000000 and appropriate 25000000.

Anionic polymer

Anionic polymer comprising one or more aromatic groups, part of the dressing material for promoter that can be contained in a dressing material for dispersion selected from the group consisting of speed of polymers, polysaccharides, and natural aromatic polymers. The term “graded polymer” in this description means a polymer obtained stepwise polymerization, and the polymer obtained from step reaction and polymerization using the speed of reactions is, respectively. Anionic polymer preferably includes an aromatic group, provided that the anionic polymer is not a polymer obtained by condensation malminkartano acid. The anionic polymer may be a step polymer or natural aromatic polymer. Anionic polymers in accordance with this invention can be linear, branched or Poperechnaya. Anionic polymer, preferably, may be water-soluble or water-dispersible. Anionic polymer is preferably organic.

Preferred anionic aromatic polymers are the polymers obtained by the condensation of naphthalenesulfonate, polymers polystyrenesulfonate and modified lignin polymers, preferred are polymers obtained by the condensation of naphthalenesulfonate, such as condensed naphthalenesulfonate and modified lignin polymers, such as ligninsulfonate.

The aromatic group of the anionic polymer may be present in the base polymer or in a group-Deputy, attached to the base polymer (main circuit). Examples of suitable aromatic groups include aryl-, aralkyl and alcarinque, as well as their derivatives, such as phenyl, tolyl, naphthyl, phenylene, xylylene, benzyl, phenylethyl and made the derivative of these groups. Examples of anionic charged groups that may be present in anionic polymers and monomers used to obtain the anionic polymer include group bearing an anionic charge, and the acid group bearing an anionic charge after dissolution or dispersion in water, with the groups specified in this description and in General are called anionic groups such as phosphate, phosphonate, sulfate, sulfonic acid, sulfonate, carboxylic acid, carboxylate, alcoholate and phenolic groups, i.e. the replacement family and nattily. Group carrying anionic charge, usually a salt of an alkali metal, alkaline earth metal or ammonium.

Examples of suitable anionic products of step polymerization in accordance with the present invention include condensation polymers, i.e. polymers obtained by stepwise condensation polymerization, for example condensates of an aldehyde, such as formaldehyde, with one or more aromatic compounds comprising one or more anionic groups, especially condensed polymers of the type naphthalenesulfonate, and, optionally, other comonomers that can be used in the condensation polymerization, such as urea. Examples of suitable aromatic compounds containing anionic groups is, include phenol compounds and naphthol, such as phenol, naphthol, resorcinol and their derivatives, aromatic acids and their salts, such as phenyl, phenol, aftilova and naftalina acid and salts, as a rule sulfonic acids and sulfonates, such as benzosulfimide and sulfonate, killswitches and sulfonates, naphthalenesulfonate and sulfonate, phenolsulfonate and sulfonate.

Examples of further suitable anionic products of step polymerization in accordance with the present invention include an additive polymers, i.e. polymers produced additive polymerization such as anionic polyurethanes obtained from a mixture of monomers comprising aromatic isocyanates and/or aromatic alcohols. Examples of suitable aromatic isocyanates include diisocyanates such as toluene-2,4 - and 2,6-diisocyanate and difenilmetana-4,4′-diisocyanate. Examples of suitable aromatic alcohols include diatomic alcohols, i.e. diols, such as bisphenol a, phenyldiethanolamine, Montereale glycerin and Montereale of trimethylolpropane. Can also be used monohydroxy aromatic alcohols such as phenol and its derivatives. The mixture of monomers may also contain non-aromatic isocyanates and/or alcohols, typically the diisocyanates and diols, for example any of them, which, as is known, note the following when obtaining polyurethanes. Examples of suitable monomers containing anionic groups include complex monoamine the interaction products triolo, such as trimethylated, trimethylolpropane and glycerin, with dicarboxylic acids or their anhydrides, such as succinic acid and anhydride, terephthalic acid and anhydride, such as monocalcium glycerin, Montereale glycerin, monocalcium of trimethylolpropane, Montereale of trimethylolpropane, N,N-bis(hydroxyethyl)glycine, di(hydroxymethyl)propionic acid, N,N-bis-(hydroxyethyl)-2-aminoetansulfonovaya acid and the like, is not necessary and, as a rule, in combination with the interaction with base, such as hydroxides of alkali metal and alkaline earth metal, such as sodium hydroxide, ammonia or amine, such as triethylamine, obtaining, thus, the counterion of the alkali metal, alkaline earth metal or ammonium.

Examples of suitable anionic products of step polymerization in accordance with this invention include anionic vinyl-additive polymers produced from a mixture of vinyl or ethylene-unsaturated monomers containing at least one monomer comprising an aromatic group, and at least one monomer comprising anionic group, as a rule, copolymerizable with non-ionic monomers such as monomers based on acrylic is the one and acrylamide. Examples of suitable anionic monomers include (meth)acrylic acid and parameningeal (hydroxytrol).

Examples of suitable anionic polysaccharides include starches, guar gums, cellulose, chitina, chitosans, glikana, galactanes, glucans, xanthan gums, pectins, mannans, dextrins, preferably starches, guar gums and cellulose derivatives, suitable starches, including starches from potato, corn, wheat, tapioca, rice, waxy maize and oats, preferably potato starch. Anionic groups in the polysaccharide can be native and/or introduced by chemical methods known in this field.

Examples of suitable (modified) natural aromatic anionic polymers in accordance with this invention include Kraft lignin, such as modified lignin polymers, such as lignin adducts, copolymerizable with formaldehyde and sulfonated lignin, for example, extracts ligninsulfonate and tannin, i.e. natural polyphenolic substances present in the organic extracts of the bark of some species of wood.

Srednevekovaja molecular weight anionic polymer may have a wide range depending, inter alia, on the type of the used polymer; it is usually at least about 500, useful is brasno above about 2000 and preferably above about 5000. The upper limit does not matter; it can be about 200000000, usually 150000000, it is advisable 100000000 and preferably 1000000.

The anionic polymer may have a wide range of degree of anionic substitution (DSAndbased, inter alia, on the type of the used polymer; DSAndis usually from 0.01 to 2.0, it is advisable from 0.02 to 1.8 and preferably from 0.025 to 1.5; and the degree of aromatic substitution (DSQ) may be from 0.001 to 1.0, as a rule from 0.01 to 0.8, it is advisable from 0.02 to 0.7 and preferably from 0.025 to 0.5. In that case, if the anionic polymer comprises cationic groups, the degree of cationic substitution (DSc) may be, for example, from 0 to 0.2, suitable from 0 to 0.1 and preferably from 0 to 0.05, while the anionic polymer has an overall anionic charge. Anionic charge density of the anionic polymer is usually from 0.1 to 6.0 mEq/g dry polymer, suitable from 0.5 to 5.0 and preferably from 1.0 to 4.0.

Cationic organic polymer including an aromatic group and an anionic polymer comprising aromatic group dressing material for promoter may be added to the aqueous slurry (raw materials) in any order, separately from the dressing material for dispersion in an amount which can vary within wide limits depending on, inter alia, on the type of raw materials, salt content, type of salts, the content of the filler, the type of filler, add, etc. In General, polymers are added in an amount to provide a better dressing than the dressing obtained without adding them, usually cationic organic polymer is added to the raw material before adding the anionic polymer. The cationic polymer is usually added in an amount constituting at least about 0.001 wt.%, often at least 0.005 wt.%, calculated on the dry weight of the raw material, while the upper limit is usually 3 wt.%, it is advisable 2.0 wt.%. Anionic polymer is usually added in an amount constituting at least about 0.001 wt.%, often at least 0.005 wt.%, calculated on the dry weight of the raw material, while the upper limit is usually 3 wt.%, it is advisable to 1.5 wt.%.

In addition to the cationic organic polymer and anionic polymer dressing material for the promoter may contain other compounds that improve the efficiency of smoothing, such as anionic fine materials, such as particles based on silica and clay type smectite, cationic organic polymers with a low molecular weight, aluminum compounds such as aluminum alum, aluminates, aluminium chloride, aluminum nitrate, as well as connections of polyamine, such as the chlorides of polyalanine, sulfates of polyalanine, connection polyalanine containing ions such as CR is reed, and sulfate, silicate-sulphate of polyalanine and their mixtures, anionic vinyl-additive polymers and combinations thereof.

The method in accordance with this invention is preferably used for obtaining a paper from a suspension containing cellulosic fibres, and optional fillers having a high conductivity. Typically, the conductivity of the raw material is at least 0,20 MS/cm, it is advisable, at least, of 0.5 MS/cm, preferably at least a 3.5 MS/cm. Very good smoothing results are observed at the level of conductivity comprising the above is 5.0 MS/cm, and even more than 7.5 MS/cm. Conductivity can be measured using standard equipment, such as, for example, the device WTW LF 539 produced hristian Berner. The above value is determined by measuring the conductivity of the pulp suspension supplied in the discharge capacity of the machine for paper or in it, or, alternatively, by measuring the conductivity of the treated fibrous mass of water resulting from dewatering of the suspension. A high level of conductivity indicates the high content of salts (electrolytes), various salts can be based on one-, two - and multivalent cations, such as alkali metals, for example PA+and+, alkaline earth metals, such as CA2+and mg2+the ions of aluminum, for example, the p Al 3+, Al(Oh)2+and Jonah polyaluminum, as well as one-, two - and multivalent anions, such as halides, for example CL-, sulfates, SO for example

2-
4
and S
-
4
, carbonates, such as
2-
3
and FNL
-
3
, silicates and lower organic acids. This invention is particularly applicable when receiving the paper from raw materials with a high content of salt or two - and multivalent cations; as a rule, the content of cations is at least 200 ppm, it is advisable, at least 300 ppm, and preferably at least 400 ppm of Salt can be obtained from cellulose fibres and fillers used to obtain raw materials, in particular, in the United mills, in which a concentrated aqueous suspension of fibers from the mill to pulp is mixed with water, getting a dilute suspension, the right to obtain a paper mill for paper. the ol can also be obtained from various additives, input raw materials, fresh water supplied during the process or added specifically, etc. in Addition, the salt content is usually higher in those processes in which purified from fibrous mass of water actively recycle, which can lead to significant accumulation of salts in the water circulating in the process.

The present invention also relates to methods of producing paper, in which purified from fibrous mass of water-intensive recycle (return to re-cycle), i.e. with a high degree of cyclization clear of a fibrous mass of water using, for example, from 0 to 30 tons of fresh water per tonne of produced dry paper, usually less than 20, it is less than 15, preferably less than 10 and especially less than 5 tons of fresh water per tonne of paper. The recirculation of the cleaned fibrous mass of water in accordance with this method, it is expedient involves mixing the specified water and cellulose fibers and/or optional fillers to obtain LightWave suspension; it preferably involves mixing purified from fibrous mass of a water suspension containing cellulosic fibres, and optional fillers to feed slurry on the forming grid for smoothing.

Additional additives usually used in obtaining the paper, of course, can be used in the conjunction with the additives in accordance with this invention, these include, for example, additional agents that provide strength in dry and wet conditions. The pulp slurry or raw materials can also contain mineral fillers of conventional type, such as, for example, kaolin, white clay, titanium dioxide, gypsum, talc, as well as natural and synthetic calcium carbonates such as chalk, ground marble and precipitated calcium carbonate.

The method in accordance with this invention is used to obtain the paper. The term “paper” in this description, of course, means not only paper and receive it, but also other sheet or film products, such as, for example, cardboard, paper and cardboard, as well as receive them. This method can be used to produce paper of various kinds of suspensions of cellulose fibers, the suspension is advisable contain at least 25 wt.%, preferably, at least 50 wt.%, such fibers in the dry substance. Suspension can be based on fibres from chemical pulp, such as sulphate, sulphite and organosolv pulp, wood pulp, such as thermogravity mass, chemical thermogravity weight, refined cellulose and cellulose from crushed wood as solid, soft, and based on recycled fibres obtained, optional the tion, from waste paper pulp and mixtures thereof. This invention is particularly applicable when getting paper from a suspension on the basis of cellulose, including recycled fibers obtained from waste paper pulp, the content of cellulose fibers such an origin can be up to 100%, expediently from 20 to 100%.

Further, the invention is illustrated by the following examples, which, however, does not mean its limitations. Share and % mean mass fraction and%, respectively, unless otherwise specified.

In all the following examples dressing material for dispersion and dressing material for the promoter is added to the pulp suspension separately. Moreover, if the promoter contains more than one polymer including an aromatic group, such polymers are added to the suspension separately with respect to each other and dispersion.

Example 1

The effectiveness of the smoothing method determined by applying the test 60 bb.

Get dressing material for anionic dispersion containing dimer of alkylbetaine (AKD), condensed naphthalenesulfonate and chloride, di(hydrogenated tallow) dimethylammonio. Dressing material for dispersion containing 30% D, 4% chloride, di(hydrogenated tallow) dimethylammonio and 6% condensed naphthalenesulfonate based D. Dressing material for the dispersion is added to raw materials in the amount of 5 to the D per ton of dry material.

Next to the charging roll type cationic starch with a cationic substitution DS, 0.065 relative to the nitrogen containing bansalrupal and/or condensed naphthalenesulfonate (produced under the trademark mol®)contained in a dressing material for the promoter. Moreover, additional components contained in the dressing material for the promoter, is added to the raw material, if necessary, as indicated in table 1, including cationic starch without aromatic groups with DS, 0.065, and particles of anionic inorganic silicon dioxide used in the form of Zola.

The core of the charging roll is 80 wt.% sulphate pulp of bleached birch/pine (60/40) and 20 wt.% Caso3purified up to 200 SF and containing 0.3 g/l of raw materials PA2SO4having a conductivity equal 461 S/cm, and pH of 8.1.

td align="left"> Test 3
Table 1
Test No.Anionic dressing material for dispersion/[kg dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton of dry raw]Cationic starch (without aromatic groups)/[kg starch per ton of dry raw]
Test 10,5010
Test 20,5100
0,5100
 
Test No.Cond. naphthalene-sulfonate/[kg cond./ton of dry raw]Anionic particles of silicon dioxide/[kg particles of silicon dioxide per ton of dry raw]Cobb 60/[g/m2]
Test 10145,2
Test 20133,5
Test 31029,3

Example 2

Determine dressing material for the effectiveness of the method (test 60 cobb), using the same dressing material for anionic dispersion, such as dressing material for the promoters and the same raw materials as in example 1, however, to raw materials add calcium chloride to achieve a conductivity equal to 5000 S/see the Number of added polymers promoter and dressing material for the agent (D) are listed in table 2.

Table 2
Test No.Anionic dressing material for dispersion/[kg dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton of dry raw]Cationic starch (without aromatic groups)/[kg starch per ton of dry raw]
Test 10,50 12
Test 20,5120
Test 30,5100
 
Test No.Cond. naphthalene-sulfonate/[kg cond./ton of dry raw]Anionic particles of silicon dioxide/[kg particles of silicon dioxide per ton of dry raw]Cobb 60/[g/m2]
Test 101,075
Test 201,028
Test 31027,8

Example 3

Get dressing material for anionic dispersion containing 8.9% of commercial dimer of alkylbetaine, 0,89% aromatic substituted cationic starch having a DS, 0.065, and containing bansalrupal, and 0.22% condensed naphthalenesulfonate manufactured under the trademark mol®. Anionic dispersion in the number of 0,0115% to 0,0140% (calculated on dry substance, see table 3), based on dimer of ketene is added to the pulp suspension (calculated on dry substance)containing 30% pine, 30% Weia, 40% eucalyptus and 15% of the besieged caso3. The conductivity of the suspension is 500 S/refer To suspensions also add dressing material for the promoter containing benzylamine starch with DS equal to the 0,065, and condensed naphthalenesulfonate manufactured under the trademark mol® (test 2). The same suspension also add the same anionic dispersion. However, dressing material for the promoter to be added to the suspension, which does not contain aromatic polymers. Dressing material for the promoter contains a cationic starch with DS, 0.065, not including an aromatic group, or particles of anionic inorganic silicon dioxide used in the form of Zola (test 1). The number of polymers promoter and dressing material for the agent (D) dispersion are shown in table 3.

Table 3
Test No.Anionic dressing material for dispersion/[kg dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton of dry raw]Cationic starch (without aromatic groups)/[kg starch per ton of dry raw]
Test 10,11505
Test 10,12505
Test 10,14005
Test 20,11550
Test 20,12550
Test 20,14050
 
Test No.Cond. naphthalene-sulfonate/[kg cond./ton of dry raw]Anionic particles of silicon dioxide/[kg particles of silicon dioxide per ton of dry raw]Cobb 60/[g/m2]
Test 100,12090,0
Test 100,12050,0
Test 100,12029,0
Test 20,120028,0
Test 20,120027,0
Test 20,120025,5

Example 4

This example uses the same variance, dressing material for promoters and suspension (raw materials), as in example 3, except that the conductivity of the suspension is 5000 S/see the Added amount of dressing material for the agent and polymers promoters are shown in table 4.

Table 4
Test No.Anionic dressing material for dispersion/[kg dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton of dry raw]Cationic starch (without aromatic groups)/[kg starch/ton dry the th raw]
Test 10,14005
Test 10,16005
Test 10,18005
Test 10,20005
Test 20,10050
Test 20,11550
Test 20,12550
Test 20,14050
 
Test No.Cond. naphthalene-sulfonate/[kg cond./ton of dry raw]Anionic particles of silicon dioxide/[kg particles of silicon dioxide per ton of dry raw]Cobb 60/[g/m2]
Test 100,120150
Test 100,120137
Test 100,120138
Test 100,120110
Test 20,120047
Test 20,120035
Test 20,120033
Test 20120 025

Example 5

The effectiveness of smoothing determined by applying the dressing material for cationic dispersion containing 15% dimer of alkylbetaine, 2% cationic starch and 0.6% of sodium lignosulphonate based D (dressing material for the agent). Cationic dressing material for the dispersion is added to raw materials in a quantity amounting to 0.5 kg/dressing material for the agent per ton of dry material. The polymers contained in the dressing material for the promoters (table 5), include condensed naphthalenesulfonate, cationic starch without aromatic groups with DS, 0.065, cationic starch comprising an aromatic group with DS, 0.065, and particles of anionic inorganic silicon dioxide used in the form of Zola. The number of added polymers promoters listed in table 5. Raw materials used are the same as in example 2, and has a pH of 8.1, and a conductivity equal to 500 S/cm can be achieved by adding to the raw material of calcium chloride.

Table 5
Test No.Cationic dressing material for dispersion/[kg dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton of dry raw]Cationic starch (without aromatic groups)/[kg starch per ton of dry raw]
Test 10,5010
Test 20,5010
Test 30,5100
 
Test No.Cond. naphthalene-sulfonate/[kg cond./ton of dry raw]Anionic particles of silicon dioxide/[kg particles of silicon dioxide per ton of dry raw]Cobb 60/[g/m2]
Test 10155
Test 21034
Test 31027,8

Example 6

The effectiveness of the smoothing method determined by applying the test 60 bb. Get dressing material for anionic dispersion containing dimer of alkylbetaine, condensed naphthalenesulfonate and chloride, di(hydrogenated tallow) dimethylammonio. Dressing material for dispersion containing 30% D, 4% chloride, di(hydrogenated tallow) dimethylammonio and 6% condensed naphthalenesulfonate based D. Dressing material for the dispersion is added to raw materials in the amount of 0,3 kg D per ton of dry material.

Dressing material for promoters include cationic starch with a cationic substitution DS, 0.065 containing bansalrupal, nonaromatic starch with a cationic substitution DS, R the main 0,065, condensed naphthalenesulfonate and meemyselfmyat. Dressing material for the promoters and the number of added polymers promoters are listed in table 6.

The core of the charging roll is 80% sulphate pulp from birch/pine (60/40) and 20 wt.% Caso3purified up to 200 SF and containing 0.3 g/l of raw materials, providing a conductivity equal to 555 S/cm, and pH were 8.22.

Table 6
Test No.Anionic dressing material for dispersion/[kg/ton of dressing material for agent per ton of dry raw]Cationic starch comprising aromatic groups/[kg/ton dry pulp]Cationic starch (without aromatic groups)/[kg/ton dry pulp]
Test 10,310 
Test 20,310 
Test 30,3 10
Test 40,3 10

Table 6 (continued)
Test No.Cond. naphthalene-sulfonate [kg/ton dry pulp]Meemyselfmyat [kg/ton dry pulp]Cobb 60/[g/m2]
Test 11 33
Test 2 152
Test 31 35
Test 4 168

1. A method of manufacturing lichtovannaya paper, comprising adding to the aqueous suspension containing cellulosic fibres, and optional fillers,

(i) dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, and

(ii) dressing material for promoter containing polymer that includes one or more aromatic groups, forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately, provided that the polymer dressing material for promoter does not contain melamine or melamine derivatives.

2. The method according to claim 1, wherein the polymer includes one or more aromatic groups contained in the dressing material for the promoter is charged.

3. The method according to any of the preceding paragraphs, in which the polymer includes one or more aromatic groups contained in the dressing material for dispersion is anionic or cationic.

4. A method of manufacturing lichtovannaya paper, including up to the t to the aqueous suspension, containing cellulosic fibres, and optional fillers,

(i) dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, and

(ii) dressing material for promoter-containing first polymer comprising one or more aromatic groups and a second polymer comprising one or more aromatic groups, forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately.

5. The method according to claim 4, in which the first and second polymer dressing material for promoter is added to aqueous suspensions separately.

6. The method according to claim 4 or 5, in which the first and second polymer contained in the dressing material for the promoter, are charged.

7. The method according to any of claims 4 to 6, in which the total charge of the first polymer and the total charge of the second polymer contained in the dressing material for the promoter, are the opposite.

8. A method of manufacturing lichtovannaya paper, comprising adding to the aqueous suspension containing cellulosic fibres, and optional fillers,

(i) dressing material for dispersion containing dressing material for the agent and a polymer comprising one or more aromatic groups, and

(ii) dressing material for promoter containing cationic organic polymer, including Odori several aromatic groups, and anionic polymer comprising one or more aromatic groups, forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter is added to aqueous suspensions separately, provided that the polymer dressing material for promoter does not contain melamine or melamine derivatives.

9. The method according to claim 8, in which the cationic organic polymer dressing material for promoter is a cationic polysaccharide or a cationic vinyldithiins polymer.

10. The method according to claim 8, in which the cationic organic polymer promoter is a cationic polysaccharide.

11. The method according to claim 8, in which the anionic polymer promoter is a step polymer, a polysaccharide or natural aromatic polymer.

12. The method according to claim 8, in which the anionic polymer promoter is a step polymer or natural aromatic polymer.

13. The method according to claim 8, in which the anionic polymer promoter is a polymer obtained by condensation of naphthalenesulfonate, or a modified polymer lignin.

14. The method according to claim 8, in which the anionic polymer promoter is a condensed naphthalenesulfonate or ligninsulfonate.

15. The method according to claim 8, in which the cationic organic polymer is a cationic polysaccharide having structural fo the formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, each of R1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion; or vinyldithiins polymer obtained by cationic polymerization of the monomer or mixture of monomers comprising a cationic monomer represented by the General formula (II):

in which R1represents N or CH3; each of R2and R3is altergroup having from 1 to 3 carbon atoms; A1represents O or NH; B1is akilagpa having 2 to 8 carbon atoms, or hydroxypropylamino; Q represents a Deputy, including an aromatic group; and X-represents an anionic counterion.

16. The method according to claim 8, in which the cationic organic polymer is a cationic polysaccharide having the structural formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, b the th of R 1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion.

17. The method according to clause 16, in which a represents akilagpa having 2 to 18 carbon atoms, optionally interrupted or substituted by one or more heteroatoms; each of R1and R2represents H or altergroup having from 1 to 3 carbon atoms; R3represents benzyl or venlateshappa.

18. The method according to claim 8, in which the cationic organic polymer and anionic polymer contained in the dressing material for the promoter, is added to aqueous suspensions separately.

19. The method according to claim 8, in which the anionic polymer is contained in a dressing material for the promoter, is added to aqueous suspensions after dressing material for dispersion and after the cationic organic polymer contained in the dressing material for the promoter.

20. A method of manufacturing lichtovannaya paper, comprising adding to the aqueous suspension containing cellulosic fibres, and optional fillers,

(i) dressing material for dispersion containing dressing material for the agent and anionic polymer comprising one or more aromatic groups, and

(ii) dressing material for promoter containing cationic organic polymer that includes one or more ar thematic groups, and anionic polymer comprising one or more aromatic groups, forming and drying the resulting suspension in which the dressing material for dispersion and dressing material for the promoter added separately, provided that the polymer dressing material for promoter does not contain melamine or melamine derivatives.

21. The method according to claim 20, in which the dressing material for the dispersion further comprises a cationic organic polymer that includes one or more aromatic groups.

22. The method according to claim 20 or 21, in which the cationic organic polymer is a cationic polysaccharide or a cationic vinyldithiins polymer.

23. The method according to any of PP and 21, in which the cationic organic polymer is a cationic polysaccharide.

24. The method according to claim 20 or 21, in which the cationic organic polymer is a cationic polysaccharide having the structural formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, each of R1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion; or vinyldithiins polymer obtained polymers is of a cationic monomer or mixture of monomers, comprising a cationic monomer represented by the General formula (II):

in which R1represents N or CH3; each of R2and R3is altergroup having 1 to 3 carbon atoms, A1represents O or NH, In1is akilagpa having 2 to 8 carbon atoms, or hydroxypropylamino, Q is the Deputy comprising an aromatic group, and X-represents an anionic counterion.

25. The method according to PP and 21, in which the cationic organic polymer is a cationic polysaccharide having the structural formula (I):

in which R represents the residue of a polysaccharide; a is a chain of atoms, including atoms and N anchoring N to the residue of the polysaccharide, each of R1and R2represents H or a hydrocarbon group, R3represents an aromatic hydrocarbon group, n is an integer from 2 to 300,000, and X-represents an anionic counterion.

26. The method according A.25, in which a represents akilagpa having 2 to 18 carbon atoms, optionally interrupted or substituted by one or more heteroatoms; each of R1and R2represents H or altergroup having from 1 to 3 carbon atoms; R3is the gasoline is or venlateshappa.

27. The method according to any of p-26, in which the anionic polymer is a stage polymer, polysaccharide, or natural aromatic polymer.

28. The method according to any of p-26, in which the anionic polymer dressing material for dispersion and promoter represents the step polymer or natural aromatic polymer.

29. The method according to any of p-26, in which the anionic polymer is a polymer obtained by condensation of naphthalenesulfonate, polymer polystyrenesulfonate or modified polymer lignin.

30. The method according to any of p-26, in which the anionic polymer is a polymer obtained by condensation of naphthalenesulfonate, or a modified polymer lignin.

31. The method according to any of p-26, in which the anionic polymer is a condensed naphthalenesulfonate or ligninsulfonate.

32. The method according to any of p-31, in which the cationic organic polymer and anionic polymer contained in the dressing material for the promoter, is added to aqueous suspensions separately.

33. The method according to any of p-32, in which the anionic polymer is contained in a dressing material for the promoter, is added to aqueous suspension after adding as a dressing material for dispersion and a cationic organic polymer contained in the dressing material for the promoter.

34. The method according to any of PP-33, W is the number of cationic organic polymer dressing material for promoter, added to the suspension, is about 0.001 to 3 wt.% calculated on dry fiber, and the amount of anionic polymer dressing material for promoter added to the suspension, is about 0.001 to 3 wt.% calculated on dry fiber.

35. The method according to any of the preceding paragraphs in which the number added to the suspension dressing material for the dispersion comprises about 0.01 to 5 wt.%, calculated as the weight of the dressing material for the agent on the weight of dry fibers.

36. The method according to any of the preceding paragraphs, in which the dressing material for dispersion is anionic or cationic.

37. The method according to any of the preceding paragraphs, in which the dressing material for an agent is a pulp-dressing material for reactive agent.

38. The method according to any of the preceding paragraphs, in which the dressing material for an agent is a dimer of ketene or the anhydride of the acid.

39. The method according to any of the preceding paragraphs, in which the dressing material for an agent is a dimer of ketene.

40. The method according to any of the preceding paragraphs, in which the conductivity of the suspension is at least 3.5 m Cm/see

41. The method according to any of the preceding paragraphs, in which the conductivity of the suspension is at least 4.5 m Cm/see

Priority items:

07.08.2000 - claims 1 to 10; 14-18; 20; 31-41;

02.08.2001 - § § 11-13; 19; 21-30; 33.



 

Same patents:

Papermaking process // 2244776

FIELD: paper industry.

SUBSTANCE: invention relates to technology of manufacturing paper from aqueous suspension containing cellulose fibers and optional fillers. Process comprises separately adding to suspension cationic processing polymer with one or several aromatic groups and anionic polymer with one or several aromatic groups. The latter is selected from polymers prepared according to stepped molecule growth mechanism, naturally occurring polysaccharides and aromatic polymers and modifications thereof, provided that, if anionic polymer is polymer prepared according to stepped molecule growth mechanism, then it cannot be anionic condensation polymer based on melaminesulfonic acid. Another condition that could be alternatively fulfilled is that anionic polymer is not anionic polystyrenesulfonate or anionic condensation polymer based on melaminesulfonic acid. Suspension is then molded into sheet and dehydrated on screen.

EFFECT: improved dehydration and/or retention during making of paper from all types of fibrous pulps, including those with high content of salts, and increased strength of dry paper.

19 cl, 10 tbl, 11 ex

The invention relates to the technology of making paper lichtovannaya

The invention relates to methods of making paper (including cardboard) and, in particular, to methods of making paper, reinforced with starch

The invention relates to methods of making paper, and particularly relates to such methods that involve the use of water-soluble polysilicate microgels, especially polyaluminosilicate microgels and aluminiumand polysilicate microgels as auxiliaries to improve uderzhivaemoi filler and enhance dewatering

The invention relates to the technology of making paper lichtovannaya

The invention relates to the production of compositions for paper sizing and can be used in the paper industry

Fixer for mustard // 2222351
The invention relates to pharmaceutical industry and relates fixer for mustard plasters containing emulsifying substance as an adhesive component in the amount of 1.0-30.0 wt.h., the filler in the amount of 1.0-30.0 wt.h., water as solvent a to 100 wt.h

The invention relates to the pulp and paper industry and can be used for the preparation of adhesives in the manufacture of cardboard and corrugated Board

The invention relates to a method of manufacturing paper contains additives, which uses alkaline water adhesives for paper

Sizing of paper // 2177521

FIELD: mining industry and mechanical engineering.

SUBSTANCE: the invention is dealt with methods of production of a paper, in particular, with its smoothing. The water suspension containing cellulose fibers and optional fillers (i) add the sizing dispersion containing a sizing agent and a polymer including one or several aromatic groups and (ii) a sizing promoter containing a polymer intercalating one or several aromatic groups. Mould and dry the produced suspension. The sizing dispersion and sizing promoter are added to the water suspension separately. The invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

EFFECT: the invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

41 cl, 6 tbl, 6 ex

Sizing composition // 2258727

FIELD: stabilized dispersions.

SUBSTANCE: invention relates to emulsification and colloidal stabilization of emulsions and dispersions of hydrophobic phases in aqueous phases using a coacervate. In particular, stable emulsified or dispersed composition of invention, including hydrophobic and aqueous phases, is stabilized by cationic colloidal coacervate stabilizer including anionic and cationic components in a proportion ensuring zeta potential of the composition to be at least 20 mV. Preferred hydrophobic phase is non-colophony reactive or non-reactive sizing substance, although employment of coacervate allows stable emulsions or dispersions of mixtures of colophony and non-colophony sizing substances to be obtained. Furthermore, methods of obtaining and using stable emulsions or dispersions as well as sized paper made using emulsified or dispersed coacervate-stabilized sizing substance are described.

EFFECT: enhanced stabilization of emulsions and dispersions.

139 cl, 1 dwg, 3 tbl, 16 ex

FIELD: gluing and sizing compositions.

SUBSTANCE: invention relates to the essentially anhydrous sizing composition and an aqueous sizing composition used in sizing paper and cardboard. Essentially anhydrous and an aqueous sizing compositions comprise gluing substance, non-ionogenic surface-active substance, an anionic surface-active substance and a monohydric alcohol. Method for preparing an aqueous composition involves homogenization of gluing substance in the presence of surface-active substances and monohydric alcohol. Invention provides preparing sizing compositions that can be homogenized easily, i. e. they represent dispersions or emulsions formed by application of insignificant shearing forces, for example, such as stirring and provides preparing sizing compositions that are stable in storage.

EFFECT: improved preparing method, improved and valuable properties of compositions.

15 cl, 6 tbl, 3 ex

FIELD: pulp-and-paper industry, in particular, sizing of paper with the use of aqueous composition.

SUBSTANCE: method involves producing aqueous composition of cellulose filaments and dehydrating paper web; adding aqueous composition to cellulose suspension, said aqueous composition comprising sizing substance aggregates; producing aqueous composition by mixing in any order before adding into aqueous suspension of aqueous solution containing at least one coagulant and aqueous dispersion containing sizing substance. Zeta-potential of composition is below 20 mV.

EFFECT: increased efficiency and simplified method.

26 cl, 5 tbl, 3 ex

FIELD: method for inner sizing of cardboard for packing of liquid products, water-repellent adhesive substance for inner sizing, cardboard for packing of liquid products, package for liquid products and use of adhesive substance for inner sizing.

SUBSTANCE: the adhesive substance for inner sizing includes the derivative of oxytanon of formula (1), typically 2-oxytanon of formula (II). Formulae (I), (II) are given in the invention description. In the derivative of oxytanon of formula (I) n has the value from 0 to 6. In formulas (I) and (II) R represents hydrogen or linear hydrocarbon chain, and R`, R``, R``` represent hydrocarbon chains: R` and R`` are mainly obtained from non-branched linear fatty acids, R```-linear or branched alcyl chain or acyclic alcyl chain.

EFFECT: provided improved method for inner sizing of cardboard for packing of liquid products, improved cardboard for packing of liquid products, package for liquid products manufactured from such a cardboard.

21 cl, 3 tbl

FIELD: manufacture of a tub-sized paper or board sheet, applicable in wood-pulp and paper industry.

SUBSTANCE: the method consists in application at least on one side of the sheet of an aqueous compound of adhesive substance in amounts not exceeding 5 g/cu.m. The content of the solid substance in the applied adhesive compound makes up at least 15%. The aqueous compound is applied on one side of the sheet after its drying in a drying section of the machine for manufacture of paper or board. After that the adhesive compound is embedded in the sheet surface.

EFFECT: reduced power of the drying section of the machine for manufacture of paper or board and provided reduction of investments and reduction of the length of the paper-making line.

9 cl

FIELD: pulp-and-paper industry, in particular paper or board production.

SUBSTANCE: claimed method includes providing of slurry containing cellulose fiber and at least sizing agent interacting with cellulose. Sizing agent is selected from group containing ketene dimmers and acid anhydrides. Cationic vinyl polymer obtained by additional polymerization, containing aromatic units and anionic vinyl polymer obtained by additional polymerization and having molecular mass from 6000-100000 are introduced into slurry. Then obtained slurry is dehydrated and paper leaf is formed.

EFFECT: increased effectiveness of sizing, dehydration and retention.

11 cl, 3 tbl, 2 ex

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