Sustainable adsorbable polymers

FIELD: chemistry.

SUBSTANCE: invention relates to an aqueous suspension of mineral pigment materials with high content of solid substances, containing dispersing substances and/or dispersants based on renewable sources, as well as methods of preparing such a suspension and to use thereof. Aqueous suspension contains mineral pigment material and at least one modified polysaccharide having carboxylation degree within range of 0.6 to 2.0 and characteristic viscosity in range of 3 to 300 ml/g, where carbon of at least one modified polysaccharide exhibits rate of nuclear transformation of 14C to 14N in range of 400 to 890 transformations per hour per gram of carbon, where at least one modified polysaccharide is present in an amount of 0.05 wt% to 5.0 wt% in relation to total weight of solid substances in suspension, Brookfield viscosity of aqueous suspension ranges from 50 to 1,500 MPa⋅s at 20 °C, and content of solid substances in suspension is more than 50 to 82 wt% in relation to total weight of suspension. Modified polysaccharide is used as a dispersing substance and/or dispersant.

EFFECT: aqueous suspension is used in production of paper, plastic, paint, food products, fodder, pharmaceutical products, drinking water and/or in agriculture for reducing effect of sunlight and ultraviolet radiation on plant leaves.

20 cl, 15 ex

 



 

Same patents:

FIELD: textiles, paper.

SUBSTANCE: invention may be used in the pulp and paper industry. The photodecomposable paper comprises titanium dioxide modified with carbon, which is distributed among the paper fibres. Carbon can be placed inside and/or on the surface of the titanium dioxide modified with carbon.

EFFECT: proposed invention enables to increase the rate of decomposition of paper under the influence of light.

14 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The composite material is obtained by reacting iron chloride solution with sodium hydroxide in the presence of short fibrillated cellulose fibres to form a dispersion of a product which is thickened by floatation to obtain floatation sludge. The fibrillated cellulose fibres contain, in wt %, at least 94% fibres with thickness of not more than 1.23 mm and at least 54% fibres with length of not more than 0.63 mm, which are present in the liquid medium in amount of 100-300 mg/dm3.

EFFECT: invention enables to obtain a composite material with iron hydroxide particles, coloured in different shades of brown and having bactericidal and ferromagnetic properties.

3 cl, 5 ex

FIELD: textiles, paper.

SUBSTANCE: method of production of paper pulp for making filled kinds of paper with use of calcium carbonate as the filler comprises preparing suspensions of milled cellulose and calcium carbonate, adding to them of the predetermined amounts of the modifying agent in the form of nano powders of oxide or hydroxide of aluminium or their mixtures, mixing the dispersions to obtain a fibrous mass, and adding to it of the gluing component and the auxiliary agent to obtain the paper pulp. As a gluing component the alkylketene dimer is used, and as an auxiliary agent the cationic starch is used in amounts of 0.3-0.4, and 0.5-0.7%, based on dry substance in the paper pulp.

EFFECT: increased degree of retention of the filler.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: method of producing calcium carbonate-containing materials, the surface of particles of which has improved dispersant adsorption properties, comprises the following steps: a) producing at least one calcium carbonate-containing material in form of an aqueous suspension or in dry form; b) producing at least one lithium ion-containing compound selected from a group comprising lithium hydroxide or lithium oxide or inorganic and/or organic monomer lithium salts selected from a group comprising mono- or polybasic acid salts, e.g., lithium carbonate, lithium sulphate, lithium citrate, lithium bicarbonate, lithium acetate, lithium chloride, lithium phosphate, in dry form or in aqueous form, and mixtures thereof; c) a combination of at least one lithium ion-containing compound from step (b) and at least one calcium carbonate-containing material from step (a).

EFFECT: invention enables to obtain a calcium carbonate-containing material in dry form or in form of a suspension, having high concentration of dry substance and low Brookfield viscosity, which retains stability over time, and good pH buffering capacity.

44 cl, 2 dwg, 10 tbl, 9 ex

FIELD: textiles, paper.

SUBSTANCE: porous fibrous product is proposed comprising cellulose or wood fibers between which by means of the binder selected from silica, alum or aldehyde the structural filler particles are attached. The application of the product for the manufacture of sack cloth and paper packets is proposed, and also the method of producing this product in which in the spray dryer the filler drops are obtained from the aqueous solution of the filler, forming in water evaporation the filler particles attached by means of the binder to the cellulose or wood fibers.

EFFECT: obtaining low-cost porous fibrous product with high strength properties.

13 cl, 16 dwg, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: dense layer of silicon dioxide is deposited on the surface of titanium dioxide particles from a gas phase, said silicon dioxide layer being doped with at least one doping element selected from a group which includes Sn, Sb, In, Y, Zn, F, Mn, Cu, Mo, Cd, Ce, W and Bi or mixtures thereof. A dense layer of silicon dioxide can be deposited on the surface of titanium dioxide from a liquid phase, said silicon dioxide layer being doped with at least one doping element selected from a group which includes Sb, In, Ge, Y, Nb, F, Mo, Ce, W and Bi or mixtures thereof.

EFFECT: invention increases photostability of titanium dioxide pigment particles.

27 cl, 18 dwg

FIELD: chemistry.

SUBSTANCE: titanium dioxide based pigment contains titanium dioxide particles in rutile form, having a coating. The coating contains aluminium phosphate, aluminium oxide, titanium oxide and silicon oxide. The particles are characterised by specific surface area, calculated according to a Brunauer-Emmet-Teller (BET) equation, of at least 15 m2/g. To obtain coated pigments, an aqueous suspension of uncoated titanium dioxide particles is prepared first, followed by addition of aluminium-containing and phosphorus-containing components. Further, while maintaining pH 4-9, an alkaline silicon-containing component and at least one pH regulating component, one of which is an acidic titanium-containing component, are then added. The formed suspension is then filtered, washed and dried and the precipitate is ground to obtain coated particles.

EFFECT: invention increases opacity of decorative paper.

22 cl, 5 ex, 1 tbl

FIELD: textiles, paper.

SUBSTANCE: method includes the sequential addition of flocculating agents of high and low molecular weight to aqueous dispersion of the filler particles followed by grinding of the resulting flakes of the filler to the desired particle size to obtain flakes of the filler resistant to grinding with a specific and controlled particle distribution.

EFFECT: improvement of quality of printed products, cost reduction for raw materials and energy.

14 cl, 10 ex, 7 tbl, 1 dwg

FIELD: textiles, paper.

SUBSTANCE: composition comprises: a) a filler, b) a cationic inorganic compound - polyaluminumchloride, c) a cationic organic compound, and d) anionic polysaccharide. The filler is present in an amount of at least about 1% by weight, based on the total weight of the composition. Anionic polysaccharide is present in an amount from about 1 to about 100 kg/ton based on the weight of the filler. The composition is substantially free of fibers. Filler composition of the version contains the components a), b), c) and d), as defined above. The only difference is that the component c) is a cationic polyamine condensation polymer, and the component d) has a degree of substitution of stoichiometrically excess anionic groups of up to about 0.65. At that each of b) and c) components present in an amount from about 0 to about 30 kg/ton based on the weight of the filler. At that the composition comprises at least one of b) and c) components. Methods of obtaining compositions of filler comprise mixing a), b), c) and d), as defined above. The invention also relates to a filler composition, which is obtained by this method, an application of the filler composition as an additive to an aqueous suspension of cellulose in the production process of paper and to manufacturing paper comprising adding a filler composition to an aqueous suspension of cellulose. The invention also relates to a paper obtained with this method, and paper comprising the filler composition.

EFFECT: improvement of composition.

35 cl, 1 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to the production of hydrophilic fibrous composite materials for medical purposes, having bactericidal, hemostatic and anesthetic effect. Biologically active fiber sheeting is made in the form of fibrous base that contains cellulose, viscose fiber and a binder; the base is coated with a material containing additives in the immobilised form. The material has a weight of 75-90 g/m2, the weight of the coating is 35-50% relative to the weight of the fibrous weight. As a binder in the base a polyamine-poliamidepichlorohydrin resin is used. The coating is made on the basis of a cationic polysaccharide of natural origin. At that the additive is a blood-coagulation factor IV, antifibrinolytics, anesthetic, antimicrobial and plastifying agents.

EFFECT: reduction of quantity of fibrous materials in manufacture of the basics, and also it has new favourable features, namely, antimicrobial, hemostatic and analgesic effects.

3 cl, 1 tbl, 3 ex

FIELD: paper industry.

SUBSTANCE: method includes preparation of paper mass that contains fillers and fibers. This paper mass is processed with polymers. Surplus of polymers is added to paper mass, alternating addition of cation and anion polymers at least in three stages. Then paper mass is dehydrated on mesh to produce fibrous cloth, which is pressed and dried. Paper web produced by this method contains at least 15 wt % of fillers. This method may be used to make paper product.

EFFECT: production of paper product of high quality with low costs.

7 cl, 3 dwg, 1 tbl, 10 ex

FIELD: textiles, paper.

SUBSTANCE: paper relates to pulp and paper industry and can be used in the manufacturing sheet and fabric-like products, pressboard and cardboard. Paper contains a filler and ether of cellulose, where ether of cellulose has a quaternary ammonia group, under the condition that, ether of cellulose is not hydroxyethyl cellulose. This also concerns the paper cover, containing ether of cellulose, which has a quaternary ammonia group.

EFFECT: reduction in the time for dehydration for increasing the productivity of paper-making machine, obtaining more high-filled paper for economical efficiency of the process, better filler retention, lowering the accumulation of ether of cellulose in the pulp water, strengthening the paper in a dry state and improving the suitability of the paper to recycling.

5 cl, 2 tbl, 4 ex

The invention relates to compositions and methods for the preparation of dispersions that can be used in particular for ink-jet printing on paper

The invention relates to the pulp and paper industry, namely the technology of surface treatment of paper and cardboard, and is intended for use in the manufacture of these types of paper and cardboard as cardboard for flat layers, some packaging paper, paper for paper tape and so on

FIELD: chemistry.

SUBSTANCE: invention relates to biocidal composition, applied for paper impregnation. Composition contains propylene glycol, starch and colloidal silver with particle size 1-13 nm in concentration in colloid solution 20-100 ppm with the following component ratio, wt %: propylene glycol - 2-4; starch - 2-4; colloidal silver - 2-3; water - the remaining part.

EFFECT: invention makes it possible to prepare ecologically harmless composition in a simple way.

2 dwg, 3 tbl, 2 ex

FIELD: textiles, paper.

SUBSTANCE: composition comprises: a) a filler, b) a cationic inorganic compound - polyaluminumchloride, c) a cationic organic compound, and d) anionic polysaccharide. The filler is present in an amount of at least about 1% by weight, based on the total weight of the composition. Anionic polysaccharide is present in an amount from about 1 to about 100 kg/ton based on the weight of the filler. The composition is substantially free of fibers. Filler composition of the version contains the components a), b), c) and d), as defined above. The only difference is that the component c) is a cationic polyamine condensation polymer, and the component d) has a degree of substitution of stoichiometrically excess anionic groups of up to about 0.65. At that each of b) and c) components present in an amount from about 0 to about 30 kg/ton based on the weight of the filler. At that the composition comprises at least one of b) and c) components. Methods of obtaining compositions of filler comprise mixing a), b), c) and d), as defined above. The invention also relates to a filler composition, which is obtained by this method, an application of the filler composition as an additive to an aqueous suspension of cellulose in the production process of paper and to manufacturing paper comprising adding a filler composition to an aqueous suspension of cellulose. The invention also relates to a paper obtained with this method, and paper comprising the filler composition.

EFFECT: improvement of composition.

35 cl, 1 dwg

FIELD: textile, paper.

SUBSTANCE: paper product includes at least two layers. The method includes the following: (i) provision of aqueous suspension that contains cellulose fibres; (ii) adding microfibrillar polysaccharide into suspension in amount sufficient to produce from approximately 0.05 to approximately 50 wt % relative to mass of cellulose fibre; (iii) dehydration of the produced suspension and moulding of the first layer, which has density from approximately 150 to approximately 500 kg/m3, of the specified layer paper product. Also refers to a version of the method for production of a layer paper production, and also to a layer paper product itself (its versions) and to application of a layer paper product.

EFFECT: improved ability to bind fibres in at least one inner layer of a paper product, improved resistance to product bends, higher compression strength, resistance to lacing, bend, Z-strength, stiffness index, compression strength in case of lower density of a paper product.

23 cl, 7 tbl, 5 ex

FIELD: textile, paper.

SUBSTANCE: according to one version, method includes provision of aqueous suspension that contains cellulose fibres. Addition of cation polysaccharide and polymer P2, which is an anion polymer, to produced suspension after all points of high polymer P1 shearing force, and P1 polymer is an anion polymer. Then water is removed from produced suspension to form paper. According to the other version, auxiliary agents are added for drainage and retention to produced suspension of cellulose fibres after all points of high shearing force. The latter are represented by a cation polysaccharide and polymer P2, being an anion polymer.

EFFECT: improved drainage without deterioration in retention and forming of paper, increased speed of paper-making machine and application of lower doses of polymer.

34 cl, 5 tbl, 5 ex

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

FIELD: textile, paper.

SUBSTANCE: 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.

EFFECT: increase of gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation of modified paper.

2 tbl, 6 ex

FIELD: pulp-and-paper industry, in particular, additive for pulp.

SUBSTANCE: 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.

EFFECT: improved dehydration and retention capacity through utilization of cationized polysaccharide product.

25 cl, 11 tbl, 10 ex

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