Method for production of modified paper |
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IPC classes for russian patent Method for production of modified paper (RU 2355842):
Compound for production of modified paper / 2355841
Invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.
Method for manufacturing paper being resistant to contamination / 2318943
The present innovation deals with manufacturing paper being resistant to contamination and applied for manufacturing bills of exchange, shares, banknotes, savings certificates and others. Out of plant fibers one should form paper fabric to impregnate it with the composition that contains polyvinyl alcohol at weight concentration being under 8%, ammonium salt of titanium chelate and lactic acid. Paper fabric treated in gluing press or impregnation bath should be dried at 100°C, not less, passed through machine calender for providing the desired smoothness for further winding by rolling. The innovation increases paper resistance to contamination at keeping its high physico-mechanical properties.
Method of production of the pigment for manufacture of the cardboard and paper / 2283393
The invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. Calcium carbonate is treated with aluminum sulfate in the aqueous medium. The treatment is conducted at aluminum sulfate consumption of 25-105 % to the mass of absolutely dry calcium carbonate at the temperature of 80-85°С during 90-180 minutes with production of the suspension containing 25-35 % dry substances in it. At that they use the aqueous medium containing the binding chosen from the group, which includes starch and polyvinyl alcohol in the amount of 0.5-3.0 mass % from the mass of the absolutely dry pigment, and-or the water soluble colorant in the amount of 0.1-0.5 mass % from the mass of the absolutely dry pigment. The suspension is additionally dried and grinded. The technical result of the invention is the improved quality of the pigment as well as expansion of its field of application.
Method of production of the pigment for manufacture of the cardboard and paper / 2283392
The invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. Calcium hydroxide suspension is treated with aluminum sulfate solution in the aqueous medium at stirring. The treatment is conducted in the aqueous medium containing the binding in the dissolved state. The binding is chosen from the group, which includes starch and polyvinyl alcohol in the amount of 0.5-5.0 mass % from the mass of the absolutely dry pigment, and-or the colorant in the amount of 0.1-0.5 mass % from the mass of the absolutely dry pigment. The technical result of the invention is the improved quality of the pigment and expansion of its field of application.
Method of production of the composite pigment for manufacture of the cardboard and paper / 2283391
The invention is pertaining to the method of production of the composite pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. Calcium hydroxide is mixed with kaolin and added with aluminum sulfate in the aqueous medium at stirring. The aqueous medium contains the binding chosen from the group, which includes starch and polyvinyl alcohol in amount of 1.5-5.0 % from the mass of the absolutely dry pigment, and-or the water soluble colorant in amount of 0.1-0.5 % from the mass of the absolutely dry pigment. The technical result of the invention is the improvement of the composite pigment quality and expansion of its field of application.
Method of production of the pigment for manufacture of the cardboard and paper / 2283390
The invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. In the water at intense stirring feed powders of calcium hydrate and calcium carbonate at the ratio of the indicated components accordingly from 1.0:2.2 up to 1.0:12.9. The produced suspension is gradually added with aluminum sulfate at its ratio to the total mass of the calcium hydroxide and calcium carbonate from 1.0:0.85 up to 1.0:4.30. Then the temperature of the mixture is increased up to 8О-85°С and the produced reaction mixture is kept at stirring within 90-180 minutes with formation of the dispersion of the pigment with the share of the dry substances in it equal to 20-35 %. Then the dispersion is dried and grinded into the powder. The powder is dispersed in the water containing the given amount of the dissolved coolant and-or binding - starch or polyvinyl alcohol. The technical result of the invention production of the pigment with the new properties, that allow to expand the field of its application at manufacture of various types of the cardboard and the paper.
 Method of preparing pigment for manufacturing paper and cardboard / 2274693
Invention relates to pigment, which can be used in manufacture of paper with filler, coated paper, and cardboard. Calcium hydroxide and calcium carbonate powders taken in proportion between 1.0:2.2 and 1.0:23.5 are added to vigorously stirred water, after which temperature of mixture is raised to 80-85°C and resulting reaction mixture is kept being stirred for 90-180 min to form dispersion of pigment containing 20-35% solids.
 A sizing composition / 2211274
 Sheet of absorbent fibrous material / 2129182
The invention relates to the production of a composite fiber material having a high hydrophilic properties and intended for use in various fields of national economy in the manufacture of products to which the requirements of high sorption capacity, capillary transport and filtration properties
 Absorbent napkin / 2129181
Compound for production of modified paper / 2355841
Invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.
 Cationized polysaccharide product as additive for pulp (versions), method for using the same and method for papermaking / 2310027
Product contains first polysaccharide having at least one first cationic substituent comprising aromatic group, and second polysaccharide having at least one second cationic substituent free of aromatic group. Method for producing of paper from water suspension containing cellulose fibers and, optionally, fillers involves adding cationized polysaccharide product to water suspension; forming and dehydrating water suspension on fabric, said cationized polysaccharide product being produced by providing reaction between first polysaccharide with at least one first aromatic agent, and second polysaccharide with at least one second agent free of aromatic group; mixing resultant polysaccharides.
 Processing of polysaccharides inorganic filler for paper / 2146316
The invention relates to compositions containing cation fine particles of inorganic material treated with at least one anionic polysaccharide or anionic modified polysaccharide
Compound for production of modified paper / 2355841
Invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.
 Swelled starch-latex compositions used in papermaking / 2311507
Paper is produced from matrix obtained from composition containing pulp fibers, filler particles and retention system for said filler based on composition comprising complex of granules of ionic non-destructed swelled starch and ionic latex in aqueous carrier. Said composition contains from 60% to 95% by weight of said granules and form 40% to 5% by weight of latex of total 100 wt% on the basis of total content of solid substances of granules and latex. Granules are latex particles carriers in said complex. Processing of carrier involves producing composition of swelled starch-latex prepared in the presence of combined-action admixture or in the absence thereof, and adding said composition to filler suspension for producing of paper having improved retention of filler and allows paper to be produced, which contains filler wherein filler admixture produces minimal negative effect upon strength characteristics. Starch-latex composition may be used with compositions free of wood or with wood-containing compositions. Processed filler is readily retained in paper web in the process of paper making, improves dehydration and creates well-formed sheets. Sheets manufactured with the use of processed filler have higher adhesion strength and tensile strength as compared to sheets containing filler processed with the use of only swelled starch or only latex.
 Dispersion / 2309213
Invention provides aqueous dispersion, method of preparing it, use of dispersion, and a paper manufacturing process comprising internal sizing and surface sizing of paper. Aqueous dispersion contains at least one cellulose-reactive sizing agent selected from group consisting of ketene dimers and multimers, at least one cellulose-unreactive sizing agent, and at least one emulsifier selected from group consisting of oxyalkylene phosphate and sulfate esters and their salts. Dispersion preparation method comprises joining together sizing agents with at least one emulsifier in presence of water to form mixture, which is then homogenized to form aqueous dispersion. Paper manufacturing process comprises forming paper sheet from pulp containing cellulose fibers and depositing said aqueous dispersion thereon. Paper manufacturing process also comprises adding said aqueous dispersion to pulp containing cellulose fibers and dehydrating pulp on screen to produce paper.
Compound for production of modified paper / 2355841
Invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.
 Chitosanium perchlorate, method for its preparing and power-consuming composition comprising thereof / 2315774
Invention describes chitosanium perchlorate of the following formula: C6O4H9NH3ClO4. This compound shows such properties as explosion-proof, absence of toxicity, resistance to moisture and heating, mechanical effects and possesses high oxidizing and binding properties. This allows its using in power-consuming compositions in mixture with chitosanium dodecahydro-clozododecaborate wherein it functions as a binding agent. The quantitative ratio between chitosanium dodecahydro-clozododecaborate in the composition is determined by required regimen of combustion: the more content of chitosanium perchlorate the higher activity of the composition.
 Chitosan product, method for its preparing (variants) / 2313538
Invention relates to preparing biologically active chitosan substances and their derivatives. Invention describes a modified chitosan substance showing pH-neutral reaction and plastic structure of chitosan particles as fractal chitosan particles of size of nanofractals from 1 nm, not less, and to 5000 nm, not above, or as cross-linked net-shaped polymer having multiple cavities of size from 1 nm, not less, to 50 nm, not above. Invention describes methods for their preparing. Invention provides high transdermal penetration of chitosan substance and enhanced capacity for administration of medicinal or biologically active substances into chitosan substance. Invention can be used in manufacturing cosmetic, curative-cosmetic, pharmacological preparations, biologically active food supplements and foodstuffs.
Chitosan-base composition reducing nitrate content in plant growing production / 2257711
Invention describes a chitosan-base composition reducing the content of nitrates in plant growing production. The composition comprises chitosan of molecular mass 20-150 kDa, organic acids - mixture of succinic, ascorbic and sorbic acids in the mass ratio = 2:1:1, respectively, activating agents of nitrate and nitrite reductases - iron nitrate, ammonium molybdate, indolyl acetic acid and ethylenediaminetetraacetic acid in the mass ratio = 20:5:1:1, respectively; or iron nitrate, ammonium molybdate, indolyl acetic acid and N,N-dicarboxymethylglutamic acid in the mass ratio = 20:5:1:1, respectively, and substances enhancing synthesis of chlorophyll - 2-oxoglutaric acid and L-glutamic acid in the mass ratio = 30:1, and a surface-active substance also in the following ratio of above indicated components, wt.-%: chitosan, 15-25; organic acids, 15-25; activators of nitrate and nitrite reductases, 25-30; enhancers of chlorophyll synthesis, 29-35, and surface-active substance, 1-3. The composition provides enhancing assimilation of inorganic nitrogen in plant and reduces the content of nitrates in plant growing productions.
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FIELD: textile, paper. SUBSTANCE: invention relates to papermaking technology, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The method includes treatment of paper with the mixture of 5-7% aqueous solution of polyvinyl alcohol with 5-7% aqueous solution of chitosan at their ratio 1:1 within 10-15 minutes, thereafter treatment with 15-20% aqueous solution of methyl phosphate borate and drying. EFFECT: prepared modified paper has increased gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation. 1 tbl, 6 ex
The invention relates to polymer industry, to a method for producing a modified paper with high fire - and heat-shielding properties, which can find application in construction, aircraft, shipbuilding and automotive industry. A method of obtaining a flame-retardant cellulosic materials by processing 25-40% solution of a mixture of dialkylphosphate with diisocyanate, taken in equimolecular ratio in the presence of triethylamine at 100-200°C. In the processing of cellulose proposed method is joining the cellulose dialkylphosphate through diisocyanate, resulting in a material acquires resistance [USSR Author's certificate No. 473722, IPC SW 15/00; publ. 14.06.75]. However, this method is time consuming, requires a high temperature range and does not guarantee the preservation of the strength characteristics of cellulosic materials. A method of obtaining modified cellulose materials by processing them phosphoric acid in the presence of urea and heat-setting at 140-160°C with additional processing molten boric acid and heat treatment at 600-700°C [USSR Author's certificate No. 371793, IPC SW 15/00; publ. 15.04.78]. The disadvantages of this method are the multistage process, the need to use complex AP is armaturnogo design and high temperatures. The closest is a method of obtaining a modified paper and cotton fabric by treatment with phosphorus and boron compounds in this paper and the fabric is treated with 2,5-10%aqueous solution of polyvinyl alcohol for 30-40 min and dried at room temperature followed by treatment within 1-2 min 5-15%solution of borate metilsulfate and drying at room temperature [Patent 2254341, MCP SW 15/05; publ. 20.06.05]. The disadvantages of this method are the duration of the processing of materials, insufficient flame retardant and temperature resistant materials. The task is to develop the modification of paper that allows you to get it with high fire - and heat-shielding properties. The technical result is to obtain a modified paper with improved fire - and heat-insulating properties, resistance to thermal oxidative degradation. The technical result is achieved in a method of producing a modified paper by treating it with an aqueous solution comprising polyvinyl alcohol, followed by treatment of 15-20%aqueous solution of a borate methylphosphate and drying, the paper is treated with a mixture of 5-7%aqueous solution of polyvinyl alcohol with 5-7%aqueous solution of chitosan in their mass ratio of 1:1 in volume is an increase of 10-15 minutes The borate methylphosphate formerly known as the fire inhibitor (Patent 2278874). Using chitosan - TU 6-09-05-397-75. The presence of modifier atoms of phosphorus and boron, which are inhibitors of combustion and oxidation, can improve the flame retardant properties of the paper to increase its resistance to thermo-oxidative degradation. In addition, the use as a modifier of an aqueous solution of the borate methylphosphate avoids mnogostadiinost or subsequent processing of the modified paper. The use of a mixture of an aqueous solution of polyvinyl alcohol (PVA) with an aqueous solution of chitosan provides the formation of the active surface, which further interacts with the HE-groups of the borate methylphosphate, and provides solid paper with fire - and heat-shielding properties. The presence of bound water in the structure of this mixture leads to an increase in the number of intermolecular hydrogen bonds, and the strength of the films at elevated temperatures. Use 5-7%aqueous solution of chitosan paper gives increased strength at elevated temperatures due to the polycyclic structure of chitosan and a high content of functional groups (-NH2, -OH, -CH2HE) and nitrogen atoms and provides a sustainable patterns of paper. When the concentration of the aqueous solution of chitosan less than 5% slower process modifications at concentrations above 7% is very viscous reaction mixture, there is the difficulty of obtaining homogeneous product. Use a mixture of 5-7%aqueous solution of PVA is beneficial to the process of modification of the paper. When increasing the concentration of aqueous solution of PVA is above 7% is obtained highly viscous reaction mixture and reduce the concentration below 5% is not a homogeneous aqueous mixture with chitosan. The claimed mass mixing ratio 1:1 provides the necessary amount of reactive groups of chitosan and the hydroxyl groups of PVA to associate with functionally active groups of paper (-OH, -CH2IT). The paper handling the mixture of aqueous solution of PVA with an aqueous solution of chitosan for 10-15 minutes most optimal, during this time the samples soaked completely. The increase in processing time is impractical and, in addition, leads to a deterioration of their physical and mechanical properties, and reduced processing time does not lead to full impregnation of paper. Use 15-20%-aqueous solution of a borate methylphosphate allows you to give the effect of fire resistance due to the chemical interaction between the functional groups (-OH, -O-(OH)-, -O-P(OH)-O-), forming a stable structure of paper with dense packing and the presence in its structure came the penetrating nets. It should be noted that this modification is not a long time, does not require high temperatures and complex hardware design. Modification of the paper carried out as follows. Sample of chitosan and PVA separately mixed with water and leave to swell and dissolve in 60 min at 20-25°C. the Obtained solutions are thoroughly mixed on a magnetic stirrer for 10-15 min at 20-25°C. The original paper samples treated with the mixture for 10-15 minutes and dried at 20-25°C until dry. A portion of the borate methylphosphate dissolved in water for 10 min at 20-25°C., Then impregnated and dried samples treated with an aqueous solution of a borate methylphosphate within 2-3 min and dried in vacuum to constant weight. Example 1. Samples of paper (strips 1 cm wide and 10 cm long) is placed at 10-15 min in a mixture of 5%aqueous solution of PVA with a 5%aqueous solution of chitosan in their mass ratio of 1:1, after which the impregnated samples subjected to drying at a temperature of 20-25°C until completely dry. Next, the dried sample is placed in a 15%aqueous solution of a borate methylphosphate aged 2-3 minutes and further dried in vacuum. Examples 2-6 carried out analogously to example 1. The obtained samples were subjected to study on one hundred the bone to burn (GOST 21793-76), strength at elevated temperatures (100°C)change in mass during thermo-oxidative degradation. The results are shown in the table. The mass changes of the samples during thermal oxidative degradation was determined by the method of differential thermal analysis [research Methods structure and properties of polymers /Youverse-Antonovich, Rhtmically; KSTU. Kazan, 2002. - 604 S.]
Sample strength at elevated temperatures was determined by the method described in the book [the Workshop on chemistry and physics of polymers: Textbook. ed. Ed. Vthkurthv. - M.: Chemistry, 1990. - 304 S.]. The table shows that the modified paper has elevated the fire - and heat-shielding properties. Samples treated with a mixture of 5-7%aqueous solution of PVA with 5-7%aqueous solution of chitosan and 15-20%aqueous solution of a borate methylphosphate not ignite. In addition, this modification improves the resistance of paper to thermo-oxidative degradation due to the stabilizing action of the atoms of nitrogen, phosphorus, and the ora. Thus, the use of this modification allows to obtain a modified paper with high fire - and heat-shielding properties; however, the modification process is not time-consuming, does not require complex equipment design and extreme temperatures. The method of obtaining a modified paper by treating it with an aqueous solution comprising polyvinyl alcohol, followed by processing of 15-20%aqueous solution of a borate methylphosphate and drying, characterized in that the paper is treated with a mixture of 5-7%aqueous solution of polyvinyl alcohol with 5-7%aqueous solution of chitosan in their mass ratio of 1:1 for 10-15 minutes
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