Composition and method of bleaching paper. RU patent 2505636.
 Fluorescent bleaching agent compositions / 2502838Composition contains at least one fluorescent bleaching agent from bis-triazinylaminostilbene compounds containing taurine groups in a triazine nucleus, having formulae (1), (2) and (3). The composition is used to bleach paper in a wet process, in a gluing press or by coating. |
 Improved optical bleaching compositions / 2495973Invention includes (a) at least one optical bleaching agent of formula (1) , wherein R1 denotes hydrogen or SO3M, R2 denotes hydrogen or SO3M, R3 denotes hydrogen or CH2CO2M, R4 denotes CH2CO2M, CH(CO2M)CH2CO2M or CH(CO2M)CH2CH2CO2M, where M denotes hydrogen, a cation of an alkali metal, ammonia, mono-methyl-di-C2-C3-hydroxyalkylammonium, dimethyl-mono-C2-C3- hydroxyalkylammonium, ammonium, which is mono-, di- or trisubstituted with a C2-C3 hydroxyalkyl radical, or a mixture of said compounds, (b) a magnesium salt or (c) binder, which is selected from a group consisting of natural starch, enzyme-modified starch, and chemically modified starch, wherein there are 0.1-15 parts of component (b) for one part of component (a). The invention also relates to a method of bleaching paper using said composition. |
 Improved optical bleaching compositions / 2495972Invention relates to a compound of formula (1) where R1 denotes hydrogen or SO 3 − , R2 denotes hydrogen or SO 3 − , R3 denotes hydrogen or CH 2 CO 2 − , R4 denotes CH 2 CO 2 − , C H ( C O 2 − ) C H 2 C O 2 − or C H ( C O 2 − ) C H 2 C H 2 C O 2 − , and where M denotes a stoichiometric cation equivalent required to balance the anionic charge in formula (1) and is a combination of Mg2+ with at least 1 additional cation. The additional cations are selected from a group consisting of H+, a cation of an alkali metal, a cation of an alkali-earth metal other than Mg2+, ammonium, mono-C1-C4 alkyl-di-C2-C3-hydroxyalkylammonium, di-C1-C4-alkyl-mono-C2-C3-hydroxyalkylammonium, ammonium, which is mono-, di- or trisubstituted with a C2-C3 hydroxyalkyl radical, and mixtures thereof. The invention also relates to versions of the method of producing said compound and use of said compound in binding compositions for bleaching paper. |
 Method for improving optical properties of paper / 2490388In one of the aspects, the invention is directed to a method which enables mainly to maintain (or even increase) the brightness and/or whiteness of paper with increased degree of grinding the cellulose pulp, where the said method comprises grinding of the cellulose pulp till the freeness value of about 100 CSF and adding the composition OVA and a polymeric carrier to the paper surface in the size press in amounts sufficient to increase brightness and/or whiteness of the paper obtained. In another aspect, the invention is directed to a method of making paper from grinded cellulose pulp, which comprises grinding the suspension of cellulosic fiber to reduce the freeness up to about 100 CSF and mixing the cellulosic fiber with at least one optical bleaching agent (OBA) during or after the grinding stage and prior to adding any additional chemical ingredients of the wet stage of production. |
 Fluorescent method of tracking of surface additives in papermaking process / 2487339Method comprises the following steps: a) adding a known amount of one or more surface additives to a papermaking process in a known proportion with a known amount of one or more inert fluorescent markers, and the inert fluorescent markers are selected from the group consisting of fluorescein or derivatives of fluorescein and rhodamine, or derivatives of rhodamine, b) measuring the fluorescence of one or more inert fluorescent markers in the point after adding the surface additives and after the web formation, at that fluorescence is measured with a fluorometer of reflective type, c) establishing the correlation between the fluorescence value of the inert fluorescent markers on the web and the concentration of surface additives in the coating on the web and/or coating thickness on the web. |
 Aqueous solutions of optical brighteners / 2445327Described is an aqueous solution of an optical brightener, containing (a) 10-50 wt % optical brightener of formula (I): where: M is hydrogen, an alkali metal atom, ammonia or an amine cation; R1 is hydrogen, C1-C4-alkyl or C2-C4-hydroxyalkyl; R2 - C1-C4-alkyl which can be substituted with -CN- or -CONH2-group or C2-C4-hydroxyalkyl; or R1 and R2 together with a nitrogen atom close a morpholine ring; (b) 0.5-9 wt % polyvinyl alcohol, having degree of hydrolysis 71-85.2% and Brookfield viscosity 3-5.4 mPa·s; and (c) water. The invention also describes use of said solution in a coating composition for paper and a method of obtaining paper coated with said coating composition. |
 Combination of optical bleaching agents / 2418904Water-soluble composition contains a) at least one water-soluble optical bleaching agent, b) a polymer obtained from an ethylenically unsaturated monomer or a monomer mixture, characterised by that at least one monomer is an acrylamide and the water-soluble polymer has average (weight-average) molecular weight between 500 and 49000, optionally c) polyethylene glycol with weight-average molecular weight between 500 and 6000, and d) water. Said composition is used to optically bleach paper. |
 Cellulose and paper of higher brightness / 2418125Full bleaching/extraction of craft cellulose fibres is carried out with a chorine agent. Afterwards fibres are washed and exposed to contact in solution with at least one optical bleach (OB) upstream the mixing box and the discharge box of the machine. Fibres in solution have consistency from 7 to 15%, pH of solution in process of contact of fibres with OB makes from 3.5 to 5.5, temperature of contact makes from 60 to 80°C, and time of contact is from 0.5 to 6 hours. Additional contact of OB with fibres is carried out in the device for coating application or in the gluing press. Contact may be carried out at the stage of storage, both at high density and low density of the craft-cellulose fibres, and also at the stage of refinement. |
| Method for reducing speed of photoyellowing / 2403332 Method concerns reducing speed of photoyellowing of paper containing mechanical pulp. The method includes coating the surface of a paper sheet during papermaking of aqueous solution containing an effective amount of one or more salts of thiocyanic acid. |
 Improved method for production of paper and cardboard production / 2401900Method includes formation of composition, containing water, raw starch and powder optical refining agent. Boiling of composition. Application of finished composition, at least on one surface of paper or cardboard base in coating press. Then base is dried. In another version of method composition is boiled at the temperature up to 299°F inclusive. |
 Luminescent anionic complexes of rare-earth elements with fluorinated pyrazole-containing 1,3-diketones and method for production thereof / 2485162Invention relates to novel complexes of rare-earth elements, which can be used as active layers of organic light-emitting diodes, optical-electronic devices as well as fluorescent labels and markers. Disclosed is a luminescent anionic complex of rare-earth elements of formula [Ln(L1)4]-M+ (I), where Ln is an ion of a trivalent rare-earth element; L1 is a diketonate ligand - a derivative of 3-polyfluoroalkyl-1-pyrazolyl-1,3-propanedione of formula (II), where Rf is CH2F, CHF2, CF3, fluorinated alkyl, cycloalkyl or aryl; M+ is a univalent cation of an alkali metal or an ammonium ion, a residue of a quaternary ammonium base, a cation of pyridinium or a secondary amine or a tertiary amine. A method of producing compound (I) is also disclosed. |
 Using 4-biphenyl carboxylic acid derivatives as organic mechanoluminescent material and mechanoluminescent composition / 2484117Disclosed are novel 4-biphenyl carboxylic acid derivatives of formula 1 as an organic mechanoluminescent material. Also disclosed is a mechanoluminescent composition which contains an effective amount of the mechanoluminescent substance of formula 1 and a luminescent substance. |
 Polymer nanoparticles containing medium for photon up-conversion / 2479616Polymer nanoparticles contain a medium for photon up-conversion and a stabilising agent. Said medium contains a polymer matrix having two organic components distributed therein. The first component is capable of absorbing light at a first wavelength in the range w≤λ1≤x and acts as a sensitiser in said medium. The second component is capable of emitting light at a second wavelength in the range y≤λ2≤z, where λ2≤λ1, and acts as an emitting component in said medium. The stabilising agent is selected from hydrophilic or amphiphilic polymers. |
 Light-sensitive polymer material having fluorescent information reading / 2478116Invention relates to optical information recording materials, particularly archival information recording based on photo-induced fluorescence, with possibility of use in optical memory devices, including three-dimensional optical memory systems for Read Only Memory (ROM). The disclosed light-sensitive polymer material with fluorescent information reading contains a precursor of an organic fluorescent compound (OFC) in form of a solution in an optically transparent copolymer of methyl methacrylate (MMA) and 2,2,2-trichloroethyl methacrylate (TCEMA) or 2,2,2-tribromoethyl methacrylate (TBEMA). Content of OFC in the solution is equal to 0.1-2 wt %. A coloured fluorescent form of OFC is formed under the action of radiation in the range of 250-330 nm. To expand the spectral range of radiation to 500 nm, the material can additionally contain pyrazolines, e.g., 1,3,5-triphenyl pyrazoline. |
 Novel organic compound and organic light-emitting device / 2477266Invention relates to an compound of general formula |
 Novel chrysene compound and organic light-emitting device using said compound / 2473530Invention relates to a chrysene compound of general formula [1]: , where each of R1-R9 denotes a hydrogen atom, and Ar1 Ar2 and Ar3 are each independently selected from a group represented by general formulae [2]: |
 Novel bichrysene compound and organic light-emitting device containing said compound / 2470906Invention relates to a bichrysene compound of general formula (1): where R1-R18, each independently, denote a substitute selected from a group consisting of hydrogen atoms and Ar1-Ar4, each independently, denote a hydrocarbon aromatic ring group selected from a group consisting of a phenyl group, a naphthyl group, a fluorenyl group and a phenanthryl group; and the hydrocarbon aromatic ring group can have, as a substitute, an alkyl group consisting of carbon and hydrogen atoms, said carbon atoms numbering from 1 to 6, a methoxy group, an ethoxy group, a phenyl group or a naphthyl group. The invention also relates to light-emitting devices using said compound. |
![Zinc (ii) bis{3-methyl-1-phenyl-4-[(quinoline-3-imino)-methyl]1-h-pyrazol-5-onato) and electroluminescent device based thereon](http://img.russianpatents.com/img_data/985/9856315-s.gif) Zinc (ii) bis{3-methyl-1-phenyl-4-[(quinoline-3-imino)-methyl]1-h-pyrazol-5-onato) and electroluminescent device based thereon / 2470025Invention relates to electroluminescent substances and specifically to zinc (II) bis{3-methyl-1-phenyl-4-[(quinoline-3-imino)-methyl]1-H-pyrazol-5-onato} of general formula I . Also disclosed is an electroluminescent device which contains zinc (II) bis{3-methyl-1-phenyl-4-[(quinoline-3-imino)-methyl]1-H-pyrazol-5-onato} of general formula I. |
 Benzoindenochrysene derivative and use thereof in organic light-emitting device / 2469015Invention relates to a benzoindenochrysene derivative of general formula (1) where each of X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15 and X16 is selected independently of each other from a hydrogen atom and a group of substitutes consisting of a halogen atom, cyano group, nitro group, tert-butyl group, methoxy group, ethynyl group, acetynyl group, benzyl group, phenyl group, naphthyl group, biphenyl group, fluorenyl group, anthracenyl, fluoranthenyl group, pyrenyl group, binaphthyl group, phenanthrenyl group, benzofluoranthenyl group, , phenanthrolinyl group and phenoxy group, and each substitute can additionally contain at least one methyl group, a tert-butyl group and a phenyl group. The invention also relates to a light-emitting device using said derivative. |
 Tris-diketonate complexes of lanthanides with pyridine ligands as luminophores and method of producing said complexes / 2463304Described are complexes of lanthanides with organic ligands of formula (1): where Ln is triple-charged europium or terbium cation; dik is a β-diketonate of formula (II): where R1, R2 is a lower alkyl, fluorinated alkyl, phenyl, 2-thienyl; Q is a pyridine-containing ligand of formula (III) or (IV), where R3, R4 is a lower alkyl, naphthyl; n=1 or 2. Described also is a method of producing lanthanide complexes of formula (I) by reacting β-diketone (dikH) and a pyridine-containing ligand Q of formula (III) or (IV) with lanthanide (III) chloride (LnCl3), or reacting a pyridine-containing ligand Q of formula (III) with a Ln(dik)3 complex. |
 Polyphosphate derivative of 1,3,5-triazine compound, synthesis method and use thereof / 2382055Invention relates to polyphosphate derivatives of 1,3,5-triazine compound, preferably melamine polyphosphate, which have high heat resistance during processing and are used as antipyrene. The compounds have average degree of condensation n (number average) of over 20, pH value of a 10% suspension of the corresponding polyphosphate derivative in water at 25°C is equal to or greater than 5, molar ratio of 1,3,5-triazine compound to phosphorus (M/F) less than 1.1 and decomposition temperature above 320°C. The polyphosphate derivatives are obtained through thermal treatment of orthophosphate or condensed phosphate with average degree of condensation n (number average) less than 20 in an ammonium atmosphere at temperature ranging from 300 to 400°C until attaining average degree of condensation greater than 20 and molar ratio of 1,3,5-triazine compound to phosphate (M/F) less than 1.1. |
FIELD: textiles, paper.
SUBSTANCE: composition comprises at least one bis-triasinylaminostilbene compound containing alkylsulfoacid groups, as a fluorescent bleaching agent, a salt of a divalent cation, the carrier, and water. The invention also relates to a method of bleaching paper, which consists in the fact that the pulp sheet is contacted with the said composition, and to the paper obtained by this method.
EFFECT: method enables to obtain paper with improved whiteness, at that the obtained paper has improved printing performance.
25 cl, 3 dwg, 3 tbl, 3 ex
The present invention relates to a composition, suitable for surface treatment of paper, in particular, to the solution for the size of the press, and to a method of bleaching of paper using the specified composition.
The production of paper to achieve good writing and printing properties and strength perform stage sizing. Such a stage sizing can be carried out, on the one hand, in paper mass (papermaking) and, on the other hand, in press ebb paper. Perhaps the combination of these two methods. On one or both stages of the production paper also usually perform bleaching of pulp or paper sheet with fluorescent whitening agent (FWA). As a rule, in case of use of paper pulp glue and fluorescent whitening agent add in the paper mass individually, whereas in the case of surface sizing fluorescent whitening agent injected into a solution for size press and together with him to put on a sheet of paper.
In the paper industry is widely used combination of surface sizing and paper bleaching. This method is widely used, in particular, in the segment of printing and writing paper (copiers, ink printing, offset and so on). There is a constant trend in the direction of paper with a surface sizing, with a high degree of whiteness and has improved print features, and, therefore, there is a need for solutions for the size of the press, are more effective. In the patent document US 6207258 B1 disclosed composition and method of improving the efficiency of ink printing, use salt of ferrous metal, in particular, calcium chloride. Thus, to achieve a more bright and contrast print, in particular, ink printing, currently in the paper industry use calcium chloride in solutions for the size of the press. However, the use of this salt adversely affects the efficiency of fluorescent whitening agents, which are widely used in solutions for the size of the press. In particular, there is a decrease in the effectiveness of whitening, paper becomes greenish-yellowish tint and, in addition, there is a loss of fluorescence.
Suddenly, it was established that certain bis- compounds containing group, when used together with the salts of divalent cations such as calcium chloride, in the compositions suitable for the surface treatment of paper, such as solutions for the size of the press, allow to overcome the problems of the current level of technology.
Thus, the present invention relates to a composition, suitable for surface treatment of paper containing
(a) at least one fluorescent whitening agent of the formula (I)
wherem and n are independent of each other are integers from 0 to 3;
R 1 , R 2 , R 3 , R 4 R 5 and R 6 independently represent a hydrogen , With 1-4-alkyl, With 1-4-alkoxy, With 1-4-, preferably With 2-4- where alkyl in a linear or branched; or R 3-and R-4 or R 5 and R 6 independently together with nitrogen atom form , or pyrolidine ring; or(2 CH I SO 3 M, where I stands for 1, 2 or 3; or
,where group-SO 3 M can be in o-, m -, or p position, and k is an integer from 1 to 3; or(C 1-C 4 -)-COOR, -(C 1-C 4-)-CONHR, -(1-4-)-COR, preferably(CH 2 ) i-COOR, -(CH 2 ) i-CONHR, -(CH 2) (i COR, where in a linear or branched, i is an integer from 1 to 4, R is a C 1-3-alkyl or equivalent M;
M represents the hydrogen or an equivalent cation, in particular, Li, Na, K, Ca, Mg, ammonia or ammonium, which is a mono-, di -, three - or With 1-4- or 2-4-;
(b) at least one salt bivalent cation;
(c) at least one media; and
(d) water.
The invention also relates to a method for bleaching paper, in which the leaf pulp lead in contact with defined above, composition, preferably in press. Preferred embodiments of the invention described in the following description, claims and graphic materials.
Figure 1 is a diagram showing the effect of chloride calcium on the efficiency of various fluorescent whitening agents in Example 1.
Figure 2 is a diagram showing the effect of various salts of divalent cations on the efficiency of various fluorescent whitening agents in Example 2.
Figure 3 is also a diagram showing the effect of chloride calcium on the efficiency of various fluorescent whitening agents in Example 3.
According to their preferred option for carrying out the invention, composition, suitable for surface treatment of paper, is a solution for the size of the press, and the way is a way of paper bleaching in press, under which the leaf pulp in contact with a solution for the size of the press.
In the context of this invention under pressure means the unit for surface application, preferably in the structure of the paper machine, which formed sheet cellulose in contact with the liquid to size the press in which the share of the solution, subject to the absorption sheet (absorbance of the solution) can preferably be adjusted by the pressure of the roll.
Similarly, it is implied that the recent modification of the size of the press, or press, namely Speedsizer and Symsizer and Gate-roll, fall under the term size press.
According to the invention, the composition contains at least one bis- connection defined above formula (I), where n, m, R 1-R 6 and M such as defined above. According to their preferred option for implementation, n and m are integers from 1 to 2, it is most preferable to 1. According to another preferred option for implementation, R 1 , R 2 , R 3 , R 4 R 5 and R 6 independently one from another represent hydrogen, From 1-4-alkyl, C 2 C 4- where alkyl in a linear or branched, -(CH 2 ) I-SO 3 M, where I represents 1, 2 or 3, or
,where group-SO 3 M can be in o-, m-, and p-position, and k is an integer from 1 to 3; more preferable to type was equal to 1. According to another preferred option for carrying out the invention, R-3 and R 5 both are-CH 2 CH 2 SO 3 M, but preferably to n and m are equal to 1. According to another preferred option for carrying out the invention, R 1 , R 2 , R 4 and R 6 represent a hydrogen atom, a R 3 and R 5 both are-CH 2 CH 2 SO 3 M, but preferably to n and m are equal to 1. According to another preferred option for carrying out the invention, R 1 , R 2 , R 4 and R 6 represent a hydrogen atom, and R 3 and R 5 both are , substituted two groups-SO 3 M 2.5-position, preferably with Pete were equal to 1. According to another preferred option for carrying out the invention, at least one of the R 1 , R 2 , R-4 or R 6 is(CH 2 ) I SO 3 M, where I represents 1, 2 or 3, a R 3 and R 5 both are-CH 2 CH 2 SO 3 M.
Better options M are hydrogen, Na, K, Ca, Mg, in particular, M is the Na or K preferable in Na.
Fluorescent whitening agents of the formula (I) can be obtained by known methods. For example, the compounds described in the patent document GB 1010759. As a rule, the connection receive a response with 4,4'--2,2'- or her salt and suitable derived additives, for example, or her salt.
The composition of the invention can contain more than one, preferably two or three, it is most preferable to three fluorescent whitening agent of the formula (I).
Component (a) in the composition may contain, in addition to at least one of fluorescent whitening agent of the formula (I)one or more known fluorescent whitening agents on the basis of bis- or .
Component (b) composition according to the invention - salt - contains the bivalent cations, preferably cations of alkali earth metal, in particular, calcium or magnesium. Preferably counterions divalent cations were mono - and polyvalent anions, in particular, halide, sulfate, , phosphate, hydrogen phosphate, , carbonate, hydrogen carbonate, nitrate, acetate, or a mixture, preferably chloride or sulfate preferable chloride. Such salt disclosed in a patent document US 6207258 B1. Preferred salt is calcium chloride, magnesium chloride, magnesium sulfate, or a mixture; more preferable calcium chloride, magnesium chloride, or a mixture; is preferable calcium chloride.
Component (s) - media - is any connection used in this technical field as a carrier, in particular, as a media suitable for solutions for the size of the press. Preferred carriers are carboxymethylcellulose (CMC), polyvinyl alcohol (PVA), starch or their mixtures, of the most preferable starch. Suitable carriers are, for example, hydrophilic polymers can form hydrogen bonds. Preferred carriers are starch, polyvinyl chloride alcohols, carboxymethyl cellulose and polyethylene glycols with molecular weight from 200 to 8000 g/mol, as well as any required mixtures of these substances, while these polymers may not necessarily be modified. Preferred polyvinyl chloride alcohols having the degree of hydrolysis of >85%, preferred carboxymethylcellulose have a degree of substitution DS>0,5. Particularly preferred polyethylene glycols with molecular mass Mn from 200 to 8000 g/mol. Are suitable, for example, but not exclusively, based on starches, potato starch, rice starch, wheat starch, corn starch or starch. In particular, instead of the natural starches preferably use starches, whose molecular weight is reduced by the partial decomposition, and/or received by derivatization. In addition, suitable starches, in respect of which combined both the stage of modification, that is partially fissured or advanced starches. To the ordinary ways of splitting starches include, for example, enzymatic, oxidation, heat or hydrolytic processing. Examples of suitable derivatives starches are starch or cationic starch.
Composition according to the invention, contains, as a component (d) water and, optionally, can contain glueing agents, such as - dimer, alkyl- dimer (AKD), anhydride (ASA), rosin size,, copolymers of styrene maleic anhydride, , copolymers of styrene and acrylic acid, polyurethane, or copolymers of ethylene and acrylic acid or other common chemicals for paper, such as -acrylate resins, latex, pigments, defoamers or salt, such as NaCl or NaHCO 3 , or a mixture of two or more of them,
Composition according to the invention, preferably contains a component (a) in amount of 0.02-3, is more preferable from 0.05 to 2, it is most preferable from 0.1 to 1 wt.% per 100 wt.% the composition. Fluorescent whitening agents, different from the agents of the formula (I), their number ranges from 5 up to 95% of mass 100% of mass component (s). Component (b) preferably contains about 0.2 to 8, in particular, from 0.5 to 6, it is most preferable from 1 to 5 wt.% 100% of mass the composition. Component (C) preferably contained in amount from 3 to 20, in particular, from 5 to 15, most preferably from 6 to 12% of mass 100% of mass the composition. Composition according to the invention, preferably contains water in the amount of 75 to 96,78, in particular, from 79 to 94,45, most preferably from 82.5 to 92,9% of mass 100% of mass the composition.
Composition may not necessarily contain agent in number from 0 to 5, in particular, from 0 to 4, it is most preferable to 3, in each case, in mass.% 100% of mass the composition.
In addition, the composition according to the invention may be contained in a relatively small number of generally less than 5 wt.%, auxiliary substances, such as, for example, dispersing agents, thickeners, antifreeze, preservatives, complexing agents, and so forth, or organic by-products of synthesis of fluorescent whitening agent, which were not completely removed during processing.
Suitable compositions are also described in the patent document US 6207258 B1, where according to the invention, as a component of (a) use at least one fluorescent whitening agent of the formula (I).
Song receive the known methods, preferably Association aqueous solution of fluorescent whitening agent, used as a component of (a), preferably with a suitable pH, with other components such as media, glueing agents, binders, pigments, salt or normalizing substances. Preferably prepare a water drug media (component (C)), to which add water preparation (salt component (b)), and then add water preparation fluorescent whitening agent (component (a)), preferably installed pH, and other components.
The method of the invention intended for bleaching paper, is carried out in accordance with known processes, preferably with the use of the size of the press, and not subject to any restrictions. The paper is not critical and can be either vertical list.
Paper obtained by a method of the invention, has improved the characteristics of the print and, in particular, suitable for ink printing.
Fluorescent whitening agent weighed in the glass and added 13,33 g 15% starch solution. Then weighed 50% calcium chloride solution, and the solution water up to 20 g, that the trials were conducted in 10% solution. After stirring for a short time, the solution put on one side of the paper base with the help of semi-automatic laboratory equipment for the deposition of coatings (№2), which should simulate the use of the film press. On such a paper-basis inflicted 1.7 g/m 2 dry starch. After pulling the paper as dried in the drying cylinder at a temperature of about 100 degrees C. After the air conditioning during the night side of the paper prepared evaluated using a spectrometer, the Datacolor (ISO2469), defining CIE L*, a* and b*, using a light source based on the standard of ISO2469.
Used the number of fluorescent whitening agent on 100 g of starch drug accounted for 0.28 g and 0.56 g, respectively; the number of calcium chloride amounted to 0 and 2 g, respectively. Used the following fluorescent whitening agents:
The results are presented in Table 1.
Table 1 FWAContent (wt.%) in drug
White on CIE
L* a* b* ΔCIE CaCl 2 FWA FWA 1 0 0,28 126,13 93,66 2,42 -9,15 1,93 2 0,28 128,06 93,72 2,42 -9,56 0 0,56 132,94 93,84 2,66 -10,59 0,11 2 0,56 133,05 94,03 2,37 -10,53 FWA 2 0 0,28 125,49 93,66 2,44 -9,01 1,02 2 0,28 126,51 93,67 2,42 -9,23 0 0,56 132,94 93,88 2,77 -10,58 -0,10 2 0,56 132,84 93,95 2,59 -10,52Comparative 1
0 0,28 124,88 93,86 1,84 -8,78 -4,52 2 0,28 120,36 93,95 0,94 -7,74 0 0,56 127,34 94,18 1,31 -9,18 -7,68 2 0,56 119,66 94,29 -0,09 -7,42Comparative 2
0 0,28 127,95 93,74 2,30 -9,52 -0,85 2 0,28 127,10 93,86 1,93 -9,27 0 0,56 134,57 93,98 2,41 -10,89 -3,89 2 0,56 130,68 94,16 1,61 -9,93Comparative 3
0 0,28 127,00 93,77 2,05 -9,30 -1,50 2 0,28 125,50 94,00 1,37 -8,86 0 0,56 134,21 94,13 2,06 -10,74 -8,61 2 0,56 125,60 94,37 0,33 -8,70As seen from Table 1, the FWA 1 and FWA 2 containing taurine group, i.e. group according to the invention, almost all concentrations of used fluorescent whitening agent showed improvement white (positive value ACIE) due to the presence of calcium chloride. This can be seen, for example, when comparing the values obtained for 0,28% of mass FWA with and without the use of calcium chloride. On the other hand, comparative FWA 1-3 showed a clear decrease in white (negative values ΔCIE). As a further illustration of the results of Table 1 also presented on the diagram in figure 1.
The above experimental data show that the use of bis- fluorescent whitening agents with groups, in particular, with groups, in the presence of salt bivalent cation, such as calcium chloride, lets get the paper with improved whiteness.
Example 2
The effectiveness of whitening FWA in accordance with the invention and comparative FWA studied in the presence of salts of divalent cations of calcium, magnesium and barium (CaCl 2 , MgCl 2 and BaCl 2 ).
Test methodology was the same as used in Example 1. The amount of salts were 0 and 2 g per 100 g of starch drug, as shown in the following Table 2. FWA used in a number of 0.28 g per 100 g of starch drug.
FWA in accordance with the invention was a FWA 3 the following formula:
As a comparative used the comparative FWA1, such as described in Example 1.
The results are presented below in Table 2 and advanced illustrated by Figure 2.
Table FWA SaltThe amount of salt (wt.%) drug
White on CIE
L* a* b* ΔCIE FWA 3 - 0 122,2 94,0 2,06 - 8,61 FWA 3 CaCl 2 2 123,70 94,07 1,69 - 1,5 8,43 MgCl 2 2 124,77 94,00 1,88 - 2,57 8,70 BaCl 2 2 124,12 94,03 1,79 - 1,92 8,54Comparative 1
- 0 122,94 94,13 1,62 - 8,23Comparative 1
CaCl 2 2 118,07 94,18 0,70 - - 7,12 4,87 MgCl 2 2 119,76 94,16 1,05 - - 7,51 3,18 BaCl 2 2 119,18 94,17 0,96 - - 7,38 3,76The above experimental data confirm that 5 improved white in the presence of salt bivalent cation received at the expense of calcium chloride and other salts of divalent cations.
Example 3
Study the effectiveness of whitening different FWA in accordance with the invention and comparative FWA in the presence of calcium chloride. The experimental technique was the same as used in Example 1. The number of calcium chloride were 0 and 2 g per 100 g of starch drug, as shown below in Table 3. FWA used in a number of 0.28 g per 100 g of starch drug, which is also shown in Table 3. FWA in accordance with the invention were FWA 1 and FWA 2, such as described in Example 1, the FWA 3 as described in Example 2, the FWA 4:
For the purpose of comparison, the FWA used the comparative FWA 1 and comparative FWA 2, such as described in Example 1.
The results are presented below in Table 3 and shown in figure 3.
Table 3 FWAContent (wt.%) in drug
White on CIE
L* a* b* ΔCIE CACl 2 FWA FWA 1 0 0,28 124,88 93,74 2,39 -8,84 2,25 2 0,28 127,13 93,85 2,39 -9,29 FWA 2 0 0,28 124,13 93,66 2,43 -8,71 2,64 2 0,28 126,77 93,79 2,45 -9,24 FWA 3 0 0,28 126,27 93,72 2,35 -9,16 0,92 2 0,28 127,19 93,97 1,98 -9,25 FWA 4 0 0,28 128,58 93,80 2,50 -9,64 0,90 2 0,28 129,48 93,89 2,43 -9,80Comparative 1
0 0,28 124,88 93,86 1,84 -8,78 -4,52 2 0,28 120,36 93,95 0,94 -7,74Comparative 2
0 0,28 128,02 93,82 2,31 -9,50 -0,72 2 0,28 127,30 of 93.96 1,91 -9,281. Composition, suitable for surface treatment of paper containing (a) at least one fluorescent whitening agent of the formula (I):
where m and n are independent of each other are integers from 0 to 3; R 1 , R 2 , R 3 , R 4 R 5 and R 6 independently represent a hydrogen , C 1-C 4-alkyl, C 1-C 4-alkoxy, C 1-C 4-, preferably C 2 C 4- where alkyl in a linear or branched; or R 3-and R-4 or R 5 and R 6 independently together with nitrogen atom form , or pyrolidine ring; or(CH 2 ) I SO 3 M, where I is equal to 1, 2 or 3; or
where group-SO 3 M can be in o-, m - or p-position and k is an integer from 1 to 3; or(C 1-C 4-)-COOR, -(C 1-C 4-)-CONHR, -( C 1-C 4-)-COR, preferably(CH 2 ) i-COOR, -(CH 2 ) i CONHR, -(CH 2 ) i-COR, where is a linear or branched, i is an integer from 1 to 4, R is C 1-C 3-alkyl or equivalent M; M represents the hydrogen or one equivalent cation, in particular Li, Na, K, Ca, Mg, ammonia or ammonium, which is a mono-, di-, tri -, or C 1-C 4- or C 2 C 4-; (b) at least one salt bivalent cation; (c) at least one carrier and (d) water.
2. Composition according to claim 1, characterized in that m and n are equal to 1, a R 3 and R 5 both are-CH 2 CH 2 SO 3 M.
3. The composition according to claim 2, characterized in that R 1 , R 2 , R 4 and R 6 mean hydrogen.
4. Composition according to claim 1, characterized in that the n and m = 1, R 1 , R 2 , R 4 and R 6 mean hydrogen, a R 3 and R 5 both are , substituted two groups-SO 3 M 2.5-positions.
5. Composition according to claim 1, wherein R 3 and R 5 both are-CH 2 CH 2 SO 3 M, and at least one of the R 1 , R 2 , R-4 or R 6 means -(CH 2 ) k-SO 3 M, where k is equal to 1, 2 or 3.
6. The composition according to claim 2, characterized in that R 3 and R 5 both are-CH 2 CH 2 SO 3 M, and at least one of the R 1 , R 2 , R-4 or R 6 means -(CH 2 ) k-SO 3 M, where k is equal to 1, 2 or 3.
7. Composition according to claim 1, characterized in that M is Na or K.
8. Composition according to claim 1, characterized in that the salt in the component (b) is a calcium chloride.
9. The composition according to claim 2, characterized in that the salt in the component (b) is a calcium chloride.
10. The composition according to claim 3, wherein the salt in the component (b) is a calcium chloride.
11. The composition according to claim 4, wherein the salt in the component (b) is a calcium chloride.
12. The composition according to claim 5, wherein the salt in the component (b) is a calcium chloride.
13. The composition according to claim 6, wherein the salt in the component (b) is a calcium chloride.
14. Composition according to claim 1, wherein the media in the component (s) selected from karboksimetiltselljulozy, polyvinyl spirit, starch and their mixtures.
15. The composition according to claim 2, characterized in that the media in the component (s) selected from karboksimetiltselljulozy, polyvinyl spirit, starch and their mixtures.
16. The composition according to claim 4, wherein the media in the component (s) selected from karboksimetiltselljulozy, polyvinyl spirit, starch and their mixtures.
17. The composition according to paragraph 14, characterized in that the carrier is a starch.
18. The composition indicated in paragraph 15 notable that the bearer is starch.
19. The composition according to article 16, wherein the carrier is a starch.
20. Composition according to claim 1, characterized in that the composition contains a component (a) in the amount from 0.02 up to 3 wt.%, component (b) in the amount of 0.2 to 8 wt.% and the feature (c) in an amount of from 3 to 20 wt.%, each per 100 wt.% the composition.
21. Composition on any of the preceding paragraphs, characterized in that it represents a solution to the size of the press.
22. The composition according to item 21, characterized in that it additionally contains agent.
23. The method of bleaching paper, wherein the leaf pulp lead in contact with the song, described in any of the preceding paragraphs.
24. Way to 23, wherein the bringing into contact with the composition is carried out in press.
25. Paper, obtained in accordance with the way on 23 or 24.