Paper coating formulation with improved optic bleacher carriers

FIELD: paper-and-pulp industry.

SUBSTANCE: formulation includes optic bleacher and low-viscosity water-soluble nonionic polysaccharide derivative, whose 5% aqueous solution exhibits at ambient temperature Brookfield viscosity below about 1500 cP.

EFFECT: increased brightness of coated paper.

34 cl, 9 tbl, 2 ex

 

The present invention relates to compositions for coating paper, which increases the optical brightness of the paper. The object of the present invention is a composition for coating paper, which includes an improved carrier for optical brighteners, which increases the efficiency of the system.

Background of invention

Before the creation of the present invention producers of coated paper often there is a need to achieve high brightness to the finished coated paper products to improve the visual perception of the paper. Thus, to increase the brightness of the paper for paper producers has become established practice, the use as components of compositions for the paper coating pigments with high brightness, such as calcium carbonate and titanium dioxide, and the introduction of fluorescent agents.

The action of such fluorescent agents (often called "optical brighteners") is based on the absorption of those waves of light radiation, the length of which corresponds to the ultraviolet range of the spectrum, and re-emission of these light waves in the visible part of the spectrum.

The lack of application of such optical brighteners (CBOs) is that their effectiveness if they are used without the other, increases the activity of the additives relative is on low. The CBOs there is no inherent affinity for pigments and synthetic latexes, resulting in a modern coating they appear to be relatively ineffective if they are not used together with some other components of compositions for coating, which have affinity to the CBOs. Thus, in the paper industry is becoming common practice the use of CBOs in combination with other additives, known as the "media Partner"who, by experience, increase the effectiveness of CBOs in the means for coating paper.

Usually by the media for CBOs that are currently used in the industry include polyvinyl alcohol and sodium carboxymethyl cellulose. Others mentioned in the literature materials that are able to increase the activity of CBOs are hydroxyethylcellulose, starch, casein, melamine-formaldehyde resins, urea-formaldehyde resin and polyglycols. Many of these materials are joint binders commonly used in the means for coating, and some cross-linking agents. Therefore, these materials are useful tools for providing paper industry the effective application of such CBOs.

There is a need for the combined use of CBOs with the selected media about what special achieving that level of increased brightness of coated paper, which would be unattainable using known so far CBOs and media.

In US no 5622749 described the use of PVA (polyvinyl alcohol) or CMC (carboxymethyl cellulose) as a dispersant or excipient together with fluorescent brighteners. In the publication JP-B 90023639 described the use of PVA or its derivatives as an aid to whiten together with CBOs telenovela type to prevent discoloration or yellowing under the action of light or heat.

In the publication JP-A (86) 61014979 described the use of water-soluble cellulose derivatives such as hydroxyethylcellulose, as a carrier for anionic fluorescent agent. In the publication DE-A 2017276 described improvement of the composition including the pigment, binder, anionic dispersant, optional CBOs and conventional additives, dispersed in water, adding polyvinylpyrrolidone to improve the activities of CBOs.

In US no 3892675 described the application does not have sufficient water-solubility of CBOs in compositions for coating, including as fillers white pigments, such as clay and polyvinyl acetate latex as the sole binder; as thickeners for these compositions are described ethers of cellulose, such as CMC. In the work J.D.Barnard, who published under the title "The Role of OBAs and Crosslinking Agents in Paper Technology, 33, No. 9, SS. 24-30 (1992)described the role of CBOs and cross-linking agents in achieving brightness and waterproof paper. On s this publication lists all of the aforementioned media for CBOs.

Summary of the invention

The object of the present invention is a system additives to the means for coating paper with low viscosity nonionic water-soluble polysaccharide derivatives, which are used as carriers for optical fluorescent whitening agents in the means for coating pigmented paper. Paper coated with these compositions, has a white surface than the paper coated with the same Partner, but without such polysaccharide derivatives.

The present invention is applicable also when the processing in the sizing press, drawing on paper with a starch coating. In this case, as the main components of any pigments, apparently, absent, and present only the starch, CBOs and the media.

The object of the present invention is a composition for coating paper, comprising optical Brightener (CBOs) and low viscosity nonionic water-soluble polysaccharide derivative, which is in the form of a solution in water exhibits a viscosity according to Brookfield at a polymer concentration of 5 wt.% and room temperature (25°is) less than about 1500 CPS, this means for the paper coating provides a high degree of optical brightness in comparison with that achieved using the same composition without the non-ionic water-soluble polysaccharide derivative.

The object of the present invention is also a method of bleaching paper including coated paper of the above-mentioned composition.

In addition, an object of the present invention is a coated paper of the above-mentioned composition.

The object of the present invention is, in addition, the method of preparation of the above compositions for coating paper, comprising a combination of optical bleach with water-soluble nonionic polysaccharide derivative, which is in the form of a solution shows a viscosity according to Brookfield, when it is dissolved in water at a polymer concentration of 5 wt.%, at a temperature of 25°With less than 1500 CPS.

Detailed description of the invention

It was found that low molecular weight variants of nonionic water-soluble polysaccharide derivatives, when used in combination with some other additives, known as fluorescent agents as components of compositions for coating paper, unexpectedly increase the brightness of the coated paper or give other benefits unlike known in the art systems is obivok.

Preferred in accordance with the present invention the polysaccharide derivatives are nonionic water-soluble ethers of cellulose. Examples of ethers of cellulose is hydroxyethyl cellulose (SCE), hydroxypropylcellulose (GOC), methylcellulose (MC), methylhydroxyethylcellulose (MHEC), methylhydroxypropylcellulose (MHPC), metilgidroxiatilzelllozu (AGEC), hydroxyethylmethylcellulose (GAMC), hypromellose (HPMC), gidroksietilirovanny husarova gum, hydroxypropylamino husarova gum, gidroksietilirovanny starch and hydroxypropyltrimonium starch. Proposed by the present invention the polysaccharide derivative may also be hydrophobic modified4-C28alkyl, -aryl or-arylalkyl groups. Preferred simple cellulose ether is a low-molecular SCE.

The present invention essentially consists in a consistent application of the tool for coating pigmented paper the following two components: 1) low viscosity water-soluble nonionic polysaccharide derivative of cellulose and 2) a fluorescent agent. When these two components are used as additives in the standard composition for coating pigmented paper, which also includes the pigment and asuume substance, they reported coated paper higher brightness than would be attached to this paper used alone or Spas, or water-soluble polymer.

In typical practice, the paper coating composition for coating is prepared by dispersing pigments, such as kaolin and calcium carbonate, in water, and then add a binder, such as polystyrene-butadiene copolymer and/or an aqueous solution heat-treated starch. The means for coating in small quantities may also contain other components for the paper coating, such as rheology modifiers, biocides, lubricants, defoamers, cross-linking agents and additives for regulating the pH.

Examples of pigments that may be used in compositions for coating are kaolin, calcium carbonate (chalk), porcelain clay, amorphous silica, silicates, barium sulfate, satinet, aluminum trihydrate, talc, titanium dioxide and mixtures thereof. Examples of binders are starch, casein, soybean protein, polyvinyl acetate, styrene-butadiene latex, acrylic latex, venerability latex and mixtures thereof. Other components that may be included in compositions for coating paper, are, for example, dispersing agents such as polyacrylates, lubricants, such as salt stearin is howling acid, preservatives, defoamers, which may be either oil-based, such as silicon dioxide, dispersed in a petroleum oil or water-based, such as hexyleneglycol, the additive for regulating the pH, such as sodium hydroxide, rheology modifiers, such as sodium alginates, carboxymethylcellulose, starch, protein, high viscosity hydroxyethylcellulose, and dilaceration latexes.

In accordance with the present invention a water-soluble polysaccharide derivative in a composition for coating administered in dosed quantities, the upper limit of which is about 3,0 frequent. the main substance in terms of the pigment component. The preferred upper limit is about 2.0 to frequent., and more preferably about 1.0 to frequent. The lower limit of the polysaccharide derivative is about 0.1 to frequent., preferably about 0.2 to frequent., and more preferably about 0.3 frequent.

A solution of low viscosity polysaccharide derivative of the present invention, when dissolved in the ratio of 5 miscast. polymer 95 frequent. water exhibits a viscosity in the range of less than 1500 CPS, as determined by viscosity measurement using a standard device Brookfield at room temperature. The preferred viscosity should be less than 1000 SP, and more predpochtitelnei 500 SP.

Benefits from use of such water-soluble polymers in comparison with use in the art of high-viscosity water-soluble polysaccharides is that such low-viscosity additives can be introduced into the composition for coating paper in relatively large amounts without causing excessive thickening composition for coating, which would restrict the ease of dosing in the paper web.

To improve the ease of injection, in compositions for coating paper polysaccharide derivatives can be prepared in the form of a concentrated aqueous suspension (see US No. 4883536 and 5028263). So, for example, concentrated suspensions of polysaccharide derivatives can be prepared by dissolving the patented method specially designed inorganic dispersing agents and stabilizers in water and then adding to the resulting solution with 25 wt.% the polysaccharide derivative. So, for example, based on this patented technology the company Hercules Incorporated was established technical products (i.e. fluidized polymer suspension ADMIRAL® 3089FS, fluidized polymer suspension ADMIRAL® 2089FS and fluidized polymer suspension ADMIRAL” 1089FS). Fluidized polymer suspension ADMIRAL® 3089FS includes the SCE polymer which, when it is added to water in such quantity that oncentrate SCE is 5 wt.%, forms a water system with a viscosity of above about 2000 CP. In contrast to both other product, such as fluidized polymer suspension ADMIRAL® 2089FS and fluidized polymer suspension ADMIRAL® 1089FS include low viscosity SCE water-soluble polymers, each of which when added to water in such quantities, at which concentration the SCE is 5%, forms a water system with a viscosity of less than about 500 CPS.

In addition to the normal amount of polysaccharide derivative contained in the composition for coating as media, CBOs component must be contained in the number, the upper limit of which is about 4.0 frequent. the basic substance, calculated on the pigment. The preferred upper limit of CBOs is approximately 2.0 to frequent., and more preferably about 1.0 to frequent. The lower limit of CBOs is about 0.1 to frequent., preferably about 0.2 to frequent., and more preferably about 0.3 frequent.

In accordance with the present invention a composition for coating paper applied to the surface of paper or cardboard using various means of achieving a given mass of the layer, and then dried to obtain the finished paper products. In the art there are many conventional methods of coating the surface of the paper. The three most common t the groups of devices for coating are the doctor, rod and air-doctor. In printing devices use a metal or ceramic rod, running at an angle and pressure required for drawing on the canvas layer thickness of several micrometers. The doctor is the most common type of device.

Fluorescent agents or CBOs, which have been installed, can be used in combination with nonionic water-soluble cellulose derivatives of the present invention include 4,4'-bis(triazinyl)aminostilbene-2,2'-disulfonate acid (tetrasulfane agents) and 4,4'-bis-2-sulfotyrosine (distearyldimethyl). CBOs that of the first type (tetrasulfane) traditionally used in the paper industry in compositions for coating paper. Distearyldimethyl (DSDV) is a Partner of a new class of recently proposed as an additive to compositions for coating paper. I believe that when the present invention can be, apparently, is also effective and other CBOs additives, such as desulfuromonas and hexachlorophane substituted fluorescent agents.

Paper coated in accordance with the present invention with the use of Spas and low viscosity nonionic water-soluble polysaccharide derivative of the present invention, showing how the degree of Beli the us, and the brightness values greater than 70%, more preferably 80%, and more preferably greater than 90%, as determined using spectrophotometer X-Rite® 968 for white and device for testing the brightness Diano® S-4 and colorimeter to determine the brightness. In addition, this paper shows improved supercalenders gloss unlike paper, manufactured using previously known carriers for CBOs.

Proposed in the present invention means have the advantage over previous polyvinyl alcohol that obtaining the polysaccharide derivative of the present invention does not require significant heat treatment as in the case of polyvinyl alcohol (PVA). Thus, the use of the additive of the present invention is greatly simplified in comparison with the conventional in the art. In addition, the present invention has a less negative impact on the ability of the coated paper to the polishing compared achievable in the case of PVA, which is used as a carrier to CBOs.

The following examples are simply illustrative purposes, but it must be borne in mind that the experts in this field of technology can be applied to other embodiments of the present invention, the safety and comfort of amnestie the scope of the invention.

EXAMPLES

The standard method

Prepared two batches of various compositions for coating. Regarding the first stage, the pigment (or fully kaolin, or mixtures of kaolin/calcium carbonate in the ratio 50:50) was prepared by aqueous suspension with a total solids content of 75%. As an auxiliary dispersant substances used product Dispex® N 40 (sodium polyacrylate) when the content of the basic substance of 0.15 frequent. in terms of pigment. After 1 h wysokosciowe mixing in pigment suspension by mixing with a low speed added 10 frequent. styrene-butadiene latex. Further, to achieve 63%of solids content as a diluent was added water and 30%ammonium hydroxide pH was brought to 8.5. Finally, in each aliquot used in the preparation of individual compositions for coating was added to the end of reducing the solids content to 61.5%.

These compositions differ selected types of pigments, because of the same composition as a pigment for coating used 100% of kaolin, while in another song used a mixture of 50% kaolin and 50% calcium carbonate (see the following tables 1 and 2). All tests used a standard binder of styrene-butadiene latex in the amount of cast. 100 frequent. the pigment.

The composition of each type of coating paper prepared whether it is on the basis of 100% of kaolin as a pigment or mixture of kaolin with calcium carbonate, was divided into several aliquot and all these aliquots were added various water-soluble polymer additives and CBOs. In testing means for coating paper, the composition of which is as a carrier for CBOs used polyvinyl alcohol, for complete hydration of pans needed to cook at 200°F for at least 40 minutes In tests using the SCE as a carrier for CBOs cooking SCE for hydration was optional. Instead, such a polymer is added to the composition for coating directly in the form of any solution or pseudouridines suspension and hydration was performed in situ by stirring, which only took about 15 minutes In the study used two different CBOs: 4,4'-bis(tri-azinyl)aminostilbene-2,2'-disulfonate acid (TETRA) and 4,4'-bis-2-sulfotyrosine (DSDP).

For the study of health in each composition for coating paper added or sodium carboxymethyl cellulose or sodium alginate with achievement of the viscosity according to Brookfield approximately 1500 CPS, as determined using a viscometer RVT shaft No. 4 at 100 rpm Then using a laboratory machine for coating Dow® (eriny room 79, type 89B-SS) at different speeds of the prepared composition was applied in the form of layers on the rolls of commercial paper No. 62 with the achievement of a number of mass values of a coating layer. Received the finished coated paper and from each of the tests was selected samples of paper, which corresponded to an equivalent mass removal of a coating layer of approximately 5 lbs/3000 sq. ft. of paper.

Then, using a spectrophotometer X-Rite® 968 and device for testing the brightness Diano® S-4 and the colorimeter was determined accordingly the whiteness and brightness of the samples coated paper. When defining each of these parameters used standard for such devices methods.

Example 1

(composition for coating on the basis of 100% kaolin)

In this example, as a pigment component compositions for coating paper used 100% of kaolin. Composition for coating are presented in table 1. A description of each water-soluble polymer carrier for CBOs, used in a separate test compositions for coating are presented in table 2.

The properties of the finished paper, which was determined by testing paper treated with these various compositions shown in tables 4 and 5.

During testing it was found that using a fluidized polymer suspension ADMIRAL® 1089FS, i.e. low viscosity nonionic is hydroxyethylcellulose at a concentration of 0.5 to frequent. the primary polymeric substances, calculated on the pigment from 1.0 frequent. distearyldimonium CBOs, has achieved the highest brightness and the second highest brightness of all tested media for CBOs added at the specified number. These results are presented in table 3. The highest degree of whiteness was achieved using a solution of hydroxyethyl cellulose of low viscosity. However, for comparison, by using a fluidized polymer suspension ADMIRAL® 3089FS (more viscous analogue of the fluidized polymer suspension ADMIRAL® 1089FS) achieved lower brightness and degree of whiteness. This result is largely confirmed what has been installed in accordance with the present invention: low viscosity hydroxyethyl cellulose as a carrier for CBOs in the coated paper is more efficient than the SCE, which is at a concentration in water of 5% shows the viscosity in excess of 1500 CPS.

The application distearyldimonium CBOs average increase brightness was 0.6 pips or 4,4 p. degree of whiteness in comparison with that obtained using 4,4'-bis(triazinyl)aminostilbene-2,2'-disulfonic acid (TETRA) (see table 4).

Table 1:
recipe with 100% kaolin
product Huber® Hydrasperse (kaolin #2) 100 pieces
styrene-butadiene latex Dow® 620 SBR10 pieces
facilitate the dispersion of the substance Dispex N-400.1 part
  
water is added to 61% solids 
media for Spas0,0, 0.50 or 1 piece
  

CBOs:4,4' -bis-(2-colfosceril) (diphenyl) (DSDP) 4,4'-bis(substituted triazinyl)aminostilbene-2,2'-disulfonate acid (TETRA)0 or 1 piece
  
product CMC 7LCT or 9M31CF (for adjustment of viscosity)Added for thickening composition for coating to the target viscosity of 1500 CPS
Table 2:
media for Spas
NameDescription
fluidized polymer suspension ADMIRAL® 1089FSfluidized polymer suspension of hydroxyethyl cellulose Natrosol® 250LR, 25% of the basic substance, the viscosity of an aqueous solution at 5% of the basic substance: <500 SP
fluidized polymer suspension AMIRAL® 2089FS fluidized polymer suspension of hydroxyethyl cellulose Natrosol® 250JR, 25% of the basic substance, the viscosity of an aqueous solution at 5% of the basic substance: >500 SP
fluidized polymer suspension ADMIRAL® 3089FSfluidized polymer suspension of hydroxyethyl cellulose Natrosol® 250GR, 25% of the basic substance, the viscosity of an aqueous solution at 5% of the basic substance: 2000 SP
experimental SCE ultra-low viscositythe solution destructional peroxide of hydroxyethyl cellulose polymer solution at 10% of the basic substance and a viscosity of <100 CPs (see US No. 5480984)
hydroxypropylcellulose Klucel 99-Llow molecular weight hydroxypropylcellulose having a viscosity of an aqueous solution at 5% of the basic substance <500 SP
Methylhydroxypropylcellulose Culminal® MHPC 25low methylhydroxypropylcellulose viscosity of an aqueous solution at 5% of the base viseslava
the methylcellulose Culminal® MC25Slow molecular weight methyl cellulose with a viscosity of an aqueous solution at 5% of the basic substance <500 SP
polyvinyl alcohol Airvol 203s vehicles (company Air Products)88% hydrolyzed, polyvinyl the CSOs alcohol

Table 3:
various media for CBOs in a concentration of 0.5 frequent. 1 frequent.
DSDF as CBOs, added to compositions for coating with 100%kaolin
0,5 frequent. media PartnerThe brightness of the coated paperWhite coated paper
fluidized polymer suspension ADMIRAL 1089FSof 87.087,7
polyvinyl alcohol Airvol 203s vehicles86,382,6
fluidized polymer suspension ADMIRAL 3089FS86,482,1
experimental SCE ultra-low viscosity85,988,3
hydroxypropylcellulose Klucel® type 99-L86,0of 87.3
methylhydroxypropylcellulose Culminal® MNRS 2585,787.1
Culminal® MC25S 85,56741
Table 4:
various media for CBOs at a concentration of 0.5 frequent. 1 frequent. CBOs are two types in compositions for coating with 100%kaolin
0,5 frequent. media PartnerThe brightness of the coated paperWhite coated paper
type SpasTETRADSDTTETRADSDT
media for Spas    
fluidized polymer suspension ADMIRAL 1089FS85,7of 87.081,587,7
polyvinyl alcohol Airvol 203s vehicles85,386,381,582,6
fluidized polymer suspension ADMIRAL 3089FS85,586,481,382,1
experimental SCE ultra-low viscosity85,785,981,588,3
hydroxyp Apicella Klucel type 99-L 85,786,081,9of 87.3
methylhydroxypropylcellulose Culminal MHPC 25to 85.285,781,187,1

0,5 frequent. media PartnerThe brightness of the coated paperWhite coated paper
the methylcellulose Culminal MC25S85,485,581,486,4

Example 2

(composition for coating with 50% kaolin and 50% calcium carbonate)

In this series of tests as the pigment components of the composition for coating used 50% kaolin together with 50% calcium carbonate. Tested compositions for coating paper presented in table 5. Descriptions of each water-soluble polymer/media CBOs are presented in table 2. The properties of the finished paper, which was determined by testing paper treated with these various compositions shown in tables 6 through 9. All of these compositions for coating tagusari to the target viscosity of the composition for coating various quantities of sodium alginate Kelgin LV.

Since the coated paper is usually subjected to polishing using superclan the RA, brightness and gloss were determined by satin-textured samples. Conditions satin consisted of two passes in supercalender, 100°F, 16.5 ft/min and 1600 pounds/linear inch.

It was found that coated paper, which included DSDT, CBOs, and low viscosity hydroxyethyl cellulose at a concentration of from 0.5 to 1.0 parts, calculated on the pigment in the composition for coating showed the highest brightness in all tested media for CBOs (see tables 6 and 8). For comparison, the paper coated with the composition, which consisted of a fluidized polymer suspension ADMIRALS® 3089FS (more viscous analogue of the fluidized polymer suspension ADMIRAL® 1089FS) or PVA showed a lower brightness.

It was also found that the brightness of the coated paper is influenced by the choice of the type of CBOs. The application distearyldimonium CBOs average increase brightness was 1.1 p. when the concentration of the media for CBOs 0.5 parts compared to that achieved using 4,4'-bis(triazinyl)aminostilbene-2,2'-disulfonic acid (TETRA). When the concentration of the media for CBOs 1.0 part as a result of application distearyldimonium CBOs average increase brightness was 1.5 p. in comparison with that achieved using 4,4'-bis(triazinyl)aminostilbene-2,2'-disulfonic acid (TETRA) (see table 7).

The results of determining the gloss is different what's samples of coated paper showed that paper coated with a composition that included 0.5 parts low viscosity hydroxyethyl cellulose, showed higher values of gloss regardless of the type of CBOs (see table 9).

Table 5:
compositions for coating paper with 50% kaolin and 50% calcium carbonate
product Huber Hydrasperse (kaolin #2)50 pieces
product Huber Hydracarb 90 (calcium carbonate)50 pieces
styrene-butadiene latex Dow 620 SBR10 pieces
facilitate the dispersion of the substance Dispex N-400.1 part
  
water is added to 61% solids 
  
media for Spas0,0, 0,25, 0,50, 0,75 or 1 piece
CBOs: 4,4'-bis-(2-colfosceril)(diphenyl)(DSDP) 4,4'-bis(substituted triazinyl)aminoethyl-0 or 1 piece
sodium alginate Kelgin LV (for adjustment of viscosity)Added for thickening composition for coating to the target viscosity of 1500 CPS

Table 6:
the hydroxyethyl cellulose and polyvinyl alcohol in two concentrations with 50% kaolin and 50% calcium carbonate in the formulation of the composition for coating paper, 1 part added CBOs type DSDT
 Brightness satin paper, coated using 0.5 parts of the media for SpasBrightness satin paper, coated using 1.0 part of the carrier for Spas
media for Spas  
fluidized polymer suspension ADMIRAL 1089FS87,787,9
polyvinyl alcohol Airvol 203 S86,887,7
fluidized polymer suspension ADMIRAL 3089FS87,187,6

type Spas
Table 7:
hydroxyethylcellulose and polyvinyl alcohol with CBOs two types and 50% kaolin and 50% calcium carbonate in the formulation of the composition for coating paper
Media for SpasBrightness brushed paperBrightness brushed paper
 0.5 parts of the media for Spas1.0 part of the carrier for Spas
TETRA, 1 pieceDSDF, 1 pieceTETRA, 1 pieceDSDF, 1 piece
fluidized polymer suspension ADMIRAL 1089FS86,387,786,287,9
polyvinyl alcohol Airvol 203s vehicles85,786,886,387,7
fluidized polymer suspension ADMIRAL 3089FS86,487,186,387,6

Table 8:
low viscosity hydroxyethylcellulose different types with 50% kaolin and 50% calcium carbonate in the formulation of the composition for coating paper with 1 frequent. DSDF as Spas
Media for SpasBrightness niesatynowany paperBrightness brushed paper
 0.5 parts of the media for Spas1.0 part of the carrier for Spas
the control experiment (without media CBOs)87,185,7
fluidized polymer suspension ADMIRAL 1089FS89,688,6
fluidized polymer suspension ADMIRAL 3089FS89,688,6
polyvinyl alcohol Airvol 203s vehicles89,6at 88.1

Table 9:
the results of the experience of gloss satin paper. processed compositions for coating with 100%kaolin and media for Spas and Spas of different types at a concentration of 1 piece
Media for SpasThe glossiness of the paper coated with the use of TETRA as SpasThe glossiness of the paper coated using DSDT as Spas
0,50 part of the fluidized polymer suspension ADMIRAL 1089FS56,158,5
0,50 parts of polyvinyl alcohol Airvol 203s vehicles55,355,9
0,50 part of the fluidized polymer suspension ADMIRAL 3089FS54,657,2

1. Composition for coating paper, comprising optical Brightener (CBOs) and low viscosity nonionic water-soluble polysaccharide derivative, an aqueous solution of which the concentration of polymer 5 wt.% and at room temperature exhibits a viscosity according to Brookfield less than about 1500 CPS, and this composition for coating paper provides increased optical brightness in comparison with that achieved with the use of what Finance is the same compositions without this nonionic water-soluble polysaccharide derivative.

2. Composition for coating paper according to claim 1, which contains at least one of the components such as the pigment and the binder.

3. Composition for coating paper according to claim 1, in which the nonionic polysaccharide derivative selected from the group comprising hydroxyethyl cellulose, hydroxypropylcellulose, methylcellulose, methylhydroxyethylcellulose, methylhydroxypropylcellulose, metilgidroxiatilzelllozu, hydroxyethylmethylcellulose, hypromellose, gidroksietilirovanny harowuiu gum, hydroxypropylamino harowuiu gum, gidroksietilirovanny starch and hydroxypropyltrimonium starch.

4. The composition according to claim 3 in which the nonionic water-soluble hydrophobic polysaccharide modified With4-C28alkyl, or-aryl, or-arylalkyl groups.

5. Composition for coating paper according to claim 1, in which the upper limit of the viscosity of 5%aqueous polysaccharide derivative is less than about 1000 CP.

6. Composition for coating paper according to claim 1, in which the upper limit of the viscosity of 5%aqueous polysaccharide derivative is less than 500 CPS.

7. Composition for coating paper according to claim 2, in which the upper limit of the content of the polysaccharide derivative is approximately 3,0 frequent. the main substance in terms of pigment is omponent.

8. Composition for coating paper according to claim 2, in which the upper limit of the content of the polysaccharide derivative is roughly 2.0 frequent. the main substance in terms of the pigment component.

9. Composition for coating paper according to claim 2, in which the upper limit of the content of the polysaccharide derivative is approximately 1,0 frequent. the main substance in terms of the pigment component.

10. Composition for coating paper according to claim 2, in which the lower limit of the content of the derivative of cellulose is about 0.1 frequent. the main substance in terms of the pigment component.

11. Composition for coating paper according to claim 2, in which the lower limit of the content of the derivative of cellulose is about 0.2 to frequent. the main substance in terms of the pigment component.

12. Composition for coating paper according to claim 2, in which the lower limit of the content of the derivative of cellulose is about 0.3 frequent. the main substance in terms of the pigment component.

13. Composition for coating paper according to claim 2, in which the upper limit of the content of CBOs is about 4.0 frequent. the main substance in terms of the pigment component.

14. Composition for coating paper according to claim 2, in which the upper limit of the content of CBOs is roughly 2.0 frequent. the main substance in terms of the pigment component.

One for coating paper according to claim 2, in which the upper limit of the content of CBOs is approximately 1,0 frequent. the main substance in terms of the pigment component.

16. Composition for coating paper according to claim 2, in which the lower limit of the content of CBOs is about 0.1 frequent. the main substance in terms of the pigment component.

17. Composition for coating paper according to claim 2, in which the lower limit of the content of CBOs is approximately 0.2 frequent. the main substance in terms of the pigment component.

18. Composition for coating paper according to claim 2, in which the lower limit of the content of CBOs is about 0.3 frequent. the main substance in terms of the pigment component.

19. Composition for coating paper according to claim 1, in which CBOs is stilbene derived.

20. Composition for coating paper according to claim 1, in which CBOs are selected from the group comprising 4,4'-bis-2-sulfotyrosine.

21. Composition for coating paper according to claim 2, in which the pigment is chosen from the group comprising kaolin, calcium carbonate (chalk), porcelain clay, amorphous silica, silicates, barium sulfate, satinet, aluminate trihydrate, talc, titanium dioxide and mixtures thereof.

22. Composition for coating paper according to claim 2, in which the binder is chosen from the group comprising starch, casein, soybean protein, polyvinyl acetate, styrene-butadiene latex, acrylic is ATEX, venerability latex and mixtures thereof.

23. Composition for coating paper according to claim 1, in which the viscosity by the Brookfield water low viscosity water-soluble polysaccharide derivative of cellulose at a concentration in water of 5 wt.% and at 25°less than about 500 CPS.

24. Method of making paper brightness, including coated paper composition according to claim 1.

25. The method of preparation of the composition according to claim 1, comprising a combination of optical Brightener and low viscosity nonionic polysaccharide derived.

26. The method according A.25, in which the optical Brightener and nonionic polysaccharide derivative in the manufacture of paper is introduced into an aqueous mixture of binder and pigment.

27. Paper coated with the composition according to claim 1.

28. Paper on item 27, showing the brightness, the value of which exceeds 70.

29. Paper on item 27, showing the brightness, the value of which exceeds 80.

30. Paper on item 27, showing the brightness, the value of which exceeds 90.

31. Paper on item 27, showing the white, the value of which exceeds 70.

32. Paper on item 27, showing the white, the value of which exceeds 80.

33. Paper on item 27, showing the white, the value of which exceeds 90.

34. Paper on item 27, manifesting increased supercalenders glossiness compared to that achieved with previously known carriers.



 

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The invention relates to a method of making a composition used in the paper industry for the application of surface coatings on paper

The invention relates to compositions for chalky paper coating containing as adhesive binding protein, and particularly to compositions containing a modified vegetable protein as an adhesive binder

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

The invention relates to the pulp and paper industry and can be used in the manufacture of cardboard for flat layers of corrugated paperboard used in the manufacture of small packagings
The invention relates to a method for impregnating decorative paper, intended for the manufacture of highly wear-resistant laminated flooring materials, in which the decorative paper is first moistened and thereby impregnate amenomori, and thus regulate the content of the resin
The invention relates to a method for impregnating decorative paper, intended for the manufacture of highly wear-resistant laminated flooring materials, in which the decorative paper is first moistened and thereby impregnate amenomori, and thus regulate the content of the resin
The invention relates to a method for impregnating decorative paper, intended for the manufacture of highly wear-resistant laminated flooring materials, in which the decorative paper is first moistened and thereby impregnate amenomori, and thus regulate the content of the resin

The invention relates to a gas-tight, in particular, to kislorodopronitsaemaya packaging material containing as the basis of high-density (i.e

FIELD: paper-and-pulp industry.

SUBSTANCE: formulation includes optic bleacher and low-viscosity water-soluble nonionic polysaccharide derivative, whose 5% aqueous solution exhibits at ambient temperature Brookfield viscosity below about 1500 cP.

EFFECT: increased brightness of coated paper.

34 cl, 9 tbl, 2 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: formulation includes optic bleacher and low-viscosity water-soluble nonionic polysaccharide derivative, whose 5% aqueous solution exhibits at ambient temperature Brookfield viscosity below about 1500 cP.

EFFECT: increased brightness of coated paper.

34 cl, 9 tbl, 2 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: formulation includes optic bleacher and low-viscosity water-soluble nonionic polysaccharide derivative, whose 5% aqueous solution exhibits at ambient temperature Brookfield viscosity below about 1500 cP.

EFFECT: increased brightness of coated paper.

34 cl, 9 tbl, 2 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: formulation includes optic bleacher and low-viscosity water-soluble nonionic polysaccharide derivative, whose 5% aqueous solution exhibits at ambient temperature Brookfield viscosity below about 1500 cP.

EFFECT: increased brightness of coated paper.

34 cl, 9 tbl, 2 ex

Coating material // 2253711

FIELD: paper-and-pulp industry.

SUBSTANCE: invention relates to pigment coating materials suitable in manufacture of coated paper, cardboard, and other cellulose materials. Coating material composition contains aqueous dispersion of pigment, binding agent, fluorescent bleaching substance, and water-soluble polymer. The latter is obtained from water-soluble ethylenically-unsaturated monomer of monomer mixture, contains 90-100 mol % of hydrophilic, mainly nonionic recurring units and 0-10 mol % of anionic recurring units, and is characterized by average molecular mass from 50 000 to 500 000. Invention also discloses coated paper and cardboard products as well as above-indicated water-soluble polymer.

EFFECT: optimized rheological properties of composition and improved optical properties of coating.

10 cl, 13 tbl, 4 ex

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