Composition for waterproofing wood boards (and its variants)


(57) Abstract:


Same patents:

FIELD: chemical industry, agriculture, in particular hardness removal agent and saltlick for cattle.

SUBSTANCE: salt with pH 4-10 is pressed under 5000-2500 N/cm2. Salt contains NaCl, less than 0.1 wt.% of water, and iron-ammonium complex of polyhydroxycarboxylic acid in amount sufficient to obtain non-caking salt. As iron-ammonium complex of polyhydroxycarboxylic acid iron-ammonium citrate with molar ratio of iron to citrate-ion from 0.5 to 2 and molar ratio of ammonium to citrate-ion from 0.5 to 2 may be used. Finished product contains 0.1-20 mg/kg of iron and has form of briquettes, balls, bars, crushed plates, tablets, etc. Invention makes it possible to provide good formability under high pressure and conserve pressed product shape in moist medium for a long time.

EFFECT: products from salt non-caking at storage and conveyance.

11 cl, 6 tbl, 2 dwg, 7 ex

FIELD: mineral fertilizers.

SUBSTANCE: invention relates to granulated mineral fertilizers containing ammonium phosphates modified by surfactants and powdering substances, which do not lose their physicochemical properties during transportation and storage. Manufacture process comprises granulation of ammonium phosphate pulp, drying of granules, sorting and selection of commercial fraction, cooling and addition of modifying supplements. The latter are added in the cooling stage into zone with bed temperature by 5-10°C exceeding temperature of cooled product. Conditioning additives utilized can be either only liquid or the same mixed with dry powdering substances.

EFFECT: improved quality of surface coverage and simplified process.

2 cl, 3 ex

FIELD: chemical industry; production of fertilizers.

SUBSTANCE: the invention is pertaining to the field of chemical industry, to production of fertilizers, namely to the methods of production of granular fertilizers, and in particular, to nitrogenous and complex fertilizers, and may be used at production of the granular fertilizers with the improved properties. The method of treatment of granular fertilizers provides for application on the surfaces of the fertilizer granules (for example, carbamide, ammonium nitrate, ammonium chloride, complex NPK fertilizers), having temperature from 45 up to 100°C of the mixture of the surface-active substances with the film-forming substance in the aqueous medium. For the application may be used both ionogenic and non-ionogenic surface-active substances. The film forming substance may be chosen from the group, which contains amino-formaldehyde resins and epoxide resins, polyvinylacetate and animal glues. The technical result of the application of the additives at the heightened temperature results in the fertilizers granules strength improvement.

EFFECT: the invention ensures the fertilizers granules strength improvement.

3 cl, 36 ex, 4 tbl

FIELD: anti-conglomeration agents.

SUBSTANCE: invention relates to loose product based on potassium formate, which contains 0.1 to 1% water and 0.5-5% water-soluble conglomeration-preventing agent, such as potassium carbonate or potassium hydroxide, which possesses affinity for water and corresponds to equilibrium humidity below equilibrium 15% relative humidity (22°C) for potassium formate.

EFFECT: provided modifying and conglomeration preventing agents for potassium formate to allow it to achieve looseness under practical storage and processing conditions.

3 cl, 4 tbl, 4 ex

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture composition comprising nitrogen-containing fertilizer as substrate and 0.05-1.5 mass % coating applied thereon to decrease dust forming and fertilizer conglomeration. Said coating includes conditioning agent containing wax, oil, resin, surfactant and optionally biodegradable polymer. Conditioning agent useful in fertilizer applying includes (mass %) wax 5-50; oil including vegetable oils, liquid animal fats, marine animal fats or products thereof 5-75; resin 30-60, wherein said resin represents natural resin or residue from distillation of unsaturated liquid animal fat, fish oil, or vegetable oil; surfactant 2-15; and biodegradable polymer 0-5 %. Conditioning agent is easily applied on fertilizer particles and provides flowability and simplifies transportation.

EFFECT: composition having non-toxic and environmentally friendly coating.

10 cl, 4 ex, 1 tbl, 4 dwg

FIELD: mineral fertilizers.

SUBSTANCE: composition preventing caking of mineral fertilizer during storage and transportation from manufacturer to consumers is based on mineral oil and further contains, wt %: imidazoline 9-13, ethylene/propylene copolymer 0.4-1.5, paraffin 14-30, oil-soluble calcium sulfonate 0.5-2.5, and polymethylsiloxane 0.003-0.005.

EFFECT: reduced caking ability and granule conglutination of fertilizer.

2 cl, 2 tbl

FIELD: mineral fertilizers.

SUBSTANCE: invention relates to a method for conditioning mineral fertilizers. Composition for conditioning mineral fertilizers comprises active component based on primary aliphatic amines, hydrocarbon solvent, modifying agent for fluidity loss representing solid hydrocarbons with melting point 50oC, not less. As active component the composition comprises product of partial or complete neutralization of primary aliphatic C10-C20)-amines with (C2-C30)-carboxylic acids wherein part of neutralized amine is varied, and hydrocarbon solvent represents purified distillate or residual mineral oils, or a mixture of distillate and residual mineral oils containing the main fraction 85%, not less, with the boiling point above 350oC in the their following content in the composition, wt.-%: active component, 10-25; hydrocarbon solvent, 40-80; temperature modifying agent for fluidity loss, 1-20. The composition of temperature 70-100oC, viscosity value at this temperature 5-50 mPa*c, temperature fluidity loss 20-60oC is applied on surface of granules in the amount 0.02-0.2% of fertilizer mass to be treated. Components of the composition provides preparing inexpensive and effective conditioning composition that doesn't form aerosol in its applying on fertilizer and not aggressive to material of transporting bands used in transport of treated product.

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

6 cl, 5 tbl, 4 ex

FIELD: mineral fertilizers.

SUBSTANCE: invention relates to ammonium nitrate-based fertilizer manufacture and consists in treatment of ammonium nitrate granules with solution containing chemical reagent and inert component, the former being potassium sulfate aqueous solution, with which prilled ammonium nitrate granules are treated at 40-50°C followed by treating granules with phosphogypsum (inert component) having moisture content 2-3% and grinding fineness no larger than 30 μm until its percentage in the granules attains 1-20%.

EFFECT: preserved high strength of ammonium nitrate granules at greater number of thermal cycles at temperatures 20 to 50C and increased temperature resistance.

3 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: sodium percarbonate particles have bleaching effect, their surface contain hydrophobized superfine silica in proportion 0.01-1 wt %. Method for proposed particles production consists in mixing of sodium percarbonate particles, preferably being dried, and 0.01-1 wt % of hydrophobized superfine silica. Particles of the invention have high stability during storage, permit handling and storage without dust formation and agglutination; they are dispersed in water readily and completely.

EFFECT: simplification of particles obtaining technology, and reducing equipment needed.

17 cl, 21 ex, 7 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to technologies which intensity the grinding process. The method involves grinding solid substances in the presence of a grinding intensifier composition. The grinding intensifier composition contains steel balls and one by-product obtained from production of biodiesel and consisting of glycerine, organic substances which do not contain glycerine, methyl esters, methanol, inorganic salts and water, or a by-product of ester exchange reactions with participation of triglycerides, consisting of glycerine, organic substances which do not contain glycerine, methyl esters, methanol, inorganic salts, water or mixture thereof.

EFFECT: invention enables to reduce agglomeration of ground particles during the grinding process, increase efficiency of the mill and reduce power input when grinding such particles.

16 cl

FIELD: wood-working industry; production of pressed building items.

SUBSTANCE: the group of inventions is pertinent to the field of production of pressed building items made out of plant roughage and may be used in wood-working construction industries and other branches of economy. The panel made by pressing out of a carpet without synthetic binding materials consists of a mixture of a birchen bark ground up to a faction of 40-5000 microns and a filler predominantly out of cellulose filaments at the following ratios in respect to the total dry solid matter (in mass %): a birchen bark - 60-95, cellulose filaments - 5-40. In an alternative version of the panel, which is made the same way as the above, the outer surfaces of the carpet are strengthened with lingo-cellulose-polymeric compound including an excelsior and the KF-EC resin with a hardener or an excelsior and triturated secondary polymer taken in amount of 10-12 mass % to the weight of the excelsior. At that the share of the lingo-cellulose-polymeric compound makes 20-40 % to the total dry weight of the carpet. The method allows to use a ground birchen bark without synthetic binding agents for shaping a carpet and its consequent pressing. At that for a carpet formation they use the birchen bark ground up to a faction of 40-5000 microns, and a filler mainly made out of cellulose filaments taken in the following ratio in respect to the total dry weight(in mass %): a birchen bark-60-95, cellulose filaments - 5-40. Before formation of the carpet the filler is moistened up to 18-20 % of absolute humidity and is mixed with ground birchen bark. The carpet is formed with a thickness equal to 200-300 % of the thickness of a finished panel. The group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.

EFFECT: group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.

8 cl, 1 tbl

FIELD: production of plate materials of the splint-slab type, applicable in the wood-working and building industries.

SUBSTANCE: the method consists in processing of husk particles by a binder containing urea-formaldehyde resin, ammonium chloride, Aerosil butadienstyrene methacrylic latex, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2; butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.

EFFECT: enhanced physico-mechanical characteristics of the plates.

2 tbl

FIELD: production of building materials, applicable in the wood-working, furniture and building industries.

SUBSTANCE: the method consists in mixing together of wood particles with urea-formaldehyde resin, butadienstyrene methacrylic latex, ammonium chloride and Aerosil, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2, butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.

EFFECT: enhanced physico-mechanical and ecological characteristics.

2 tbl

FIELD: wood-working industry, in particular, methods for decreasing the content and emission of formaldehyde intended for fiber boards.

SUBSTANCE: the process of production of fiber boards is conducted with employment of aminated adhesive resins with an addition of substances binding the formaldehyde by compacting in running presses or continuous-action presses and by cooling. After compacting, but before cooling the fiber board is subjected to a short-time curing at 80 to 100C during 6 to 16 hours, depending an the expected level of decrease and emission of formaldehyde and used parameters of the process of production.

EFFECT: reduced content and emission of formaldehyde in the fiber board.

5 cl, 3 dwg, 3 ex

FIELD: wood-working industry, applicable in furniture, building, packaging and machine-building branches of industry.

SUBSTANCE: the method consists in the fact that filings and sawdust composed of: coniferous needles - 80%< filings - 10%, sawdust - 5% and wood fibers - 5% are added to the ground pulp of coniferous needles. The obtained mass is fed to the forming unit, which forms the sheets, which are fed to a press, where they are compacted at a pressure of not more than 10 Mpa at a temperature of not higher than 250C during not longer than 30 S. The obtained coniferous-needle material is cooled down, packed and delivered to the consumers.

EFFECT: produced material with breaking load, high density, low water absorption.

1 dwg, 1 tbl

FIELD: manufacture of substantially flat articles, for instance particle boards and other articles of industrial wood residue or vegetable raw materials by hot pressing thereof.

SUBSTANCE: method for particle board production involves performing hot molding at temperature of 120-200°C and under pressure of 2.5 - 30.0 MPa for panel forming. Industrial waste, molasses, concentrated corn steep or mixture thereof are used as binding material, wherein lime and starch-containing materials are added to mixture including industrial wood residue or vegetable raw materials and the binding material before hot molding operation beginning.

EFFECT: increased ecological safety and increased strength of the panels.

4 cl, 1 tbl, 1 ex

FIELD: production of plate material.

SUBSTANCE: proposed composition is made on base of dispersed raw material with modifying additive; plate material is made by molding the said composition at temperature of 160-190°C and pressure of 65-95 kg/cm2; molding time of 1 min per 1 mm of plate thickness. Used as modifying agent are acid by-products of oxidation of cyclohexane of caprolactam process at mass ratio to wood wastes of 50-70:30-50, respectively.

EFFECT: facilitated procedure of production of composition.

1 tbl

FIELD: wood-working industry.

SUBSTANCE: fiber or chip is dried, then it is mixed with glue at a temperature of below 100C, and a plate is formed at a temperature above 140C, wood is decomposed into solid and liquid components that are used as the glue. The installation for manufacture of the plate has a drying device, device for application of glue onto the fiber or chip, device for compaction, transport facilities for transferring the fiber or chip from the drying device to the device for application of glue, mixer having means for cooling the body. The contents of glue in a plate obtained with the use of the installation makes up 45 to 55 kg per cubic meter of plate.

EFFECT: produced plate with a lower contents of glue as compared with plates produced by the known methods.

31 cl, 2 dwg

FIELD: compositions used for manufacture of plates from wood laminate.

SUBSTANCE: composition for manufacture of plates contains rice shell or rice shell and sawdust mixture used as filler, liquid sodium glass having modulus of 2.4-3.6, and silicon dioxide. Artificial silicon dioxides or siliceous dust-like wastes of various industries may be used as silicon dioxides, with SiO2 content making at least 80%. Composition components are used in predetermined ratio.

EFFECT: improved strength and water tightness, and increased efficiency in utilization of various wastes.

2 tbl