Biodegradable composite material
SUBSTANCE: biodegradable composite material comprising a polymeric matrix based on waste formaldehyde resin and a filler comprising starch, yeast, casein glue, characterized by the filler containing sodium hydrogen carbonate in the following component ratio, by weight: waste phenol-formaldehyde resin SF-010 50.8-55.5, sodium bicarbonate 15.0-16.5, starch 11.0-13.0, casein glue 11.0-16.0, yeast 6.0-6.5.
EFFECT: biodegradable composite material is proposed that efficiently utilizes phenol-formaldehyde resins and their wastes by biodegradation with the aim of reduction of the hazard class of the disposed substances, without adversely affecting the soil.
FIELD: woodworking industry.
SUBSTANCE: manufacturing method comprises loading phenol, loading water, loading the first portion of caustic soda, loading formalin and loading the second portion of caustic soda. At that, formalin before loading to the reaction mixture and adding the second portion of caustic soda is mixed with paraformaldehyde solution followed by neutralisation of the mixture with granulated caustic soda.
EFFECT: reduction of amount of free volatiles, reduction of alkalinity, and increase in the degree of cure of these oligomers, improvement of qualitative characteristics of the plywood and chipboard obtained on their basis.
1 tbl, 3 ex
SUBSTANCE: composition is also used to soften and desalinate process water, in production of synthetic detergents, in the paint industry and industry of polymer materials. The composition for producing cation-exchange fibre material consists of paraphenol sulphonic acid, formalin, basalt wool subjected to preliminary heat treatment for 1 hour at 350-450°C and microwave treatment at radiation power of 750 W for 30 s, and further contains phenol resin - a phenol production waste. The composition contains, wt %: paraphenol sulphonic acid 48.4-54.4, formalin 35.3, heat- and microwave-treated basalt wool 9.1, phenol resin 1.2-7.2.
EFFECT: composition enables synthesis of cation-exchange fibre material with an improved set of properties, particularly higher static exchange capacity and low filtrate oxidation susceptibility, and solves the problem of recycling phenol resin.
2 tbl, 4 ex
SUBSTANCE: binder contains, wt parts: phenol novolak oligomer mixed with 8-13% of hexamethylene tetramine - 100, benzoic acid - 0.5-1.0, powdered swollen perlite - 0.5-1.0.
EFFECT: invention makes it possible to improve physical and mechanical properties and to reduce toxic gas release during processing and production of items based on a binder.
SUBSTANCE: invention relates to polymer-based composite frictional nonmetallic materials and specifically to phenol-formaldehyde resin-based materials and can be used in making shock-absorbers, clutch couplings, brake assemblies etc. The composite frictional polymer material contains, wt %: phenol-formaldehyde resin 25-33; zinc stearate - 0.6-1.2; kaolin - 15-23; graphite - 8-19; asbestos - the balance.
EFFECT: high wear resistance of both the composition and the counterface, while maintaining the required coefficient of friction in the friction pair.
2 tbl, 1 ex
SUBSTANCE: invention relates to composite high-molecular weight heat-insulation structural materials, specifically to filling-type compositions for producing composite foamed heat-insulation material and can be used in civil and industrial construction, as well as in aviation, transportation industry and mechanical engineering. The composition contains the following, pts.wt: resol type phenol-formaldehyde resin 100, foaming/curing agent 15-25, modified sorbent 5-40. The modified sorbent is natural or artificial zeolite, which is pretreated with halides of amphoteric metals selected from AlF3 or SnCl2 2H2O with content of the latter ranging from 0.01 to 20 wt % by dry mass.
EFFECT: reduced release of phenol during foaming and use of heat-insulation articles from filling phenoplast foam based on resol type phenol-formaldehyde resin and foaming/curing agent.
SUBSTANCE: invention relates to aircraft engineering, mechanical engineering and specifically to light, impact resistant, non-flammable foam materials which can be used as structural and heat-insulation aggregates, as well as in making components of "unsinkable" structures with a low water- and fuel-absorption coefficient, for example, float level gauges of fuel tanks of engine units. Disclosed is a composition for producing foam plastic having the following chemical composition, pts.wt: phenol novolac resin 20-40, phenol resol resin 60-80, nitrile rubber 20-40, urotropin 3-10, foaming agent 15-20, aluminium nitrilotrimethylphosphonate fire retardant 3-10. The technical result is high impact viscosity and low fuel-absorption of the foam plastic.
EFFECT: use of the disclosed foam plastic increases reliability of aircraft engineering articles and widens the field of use of said foam plastic.
2 tbl, 3 ex
SUBSTANCE: invention relates to production of frictional moulding materials which can be used in making brake pads, clutch plates and when producing high-strength structural materials for mechanical engineering, electrical engineering and other purposes. The method involves adding a solution of a modifier and a lubricant into a water-emulsion or water-alcohol phenol-formaldehyde resin by mixing to a homogeneous state. The obtained product is then mixed with an inorganic fibre filler and mineral powder, dried, pelleted and moulded. The modifier used is a water-soluble epoxy resin obtained by reacting epoxy diane resin with polyethylene glycol and a technical mixture of dioxane alcohols in the presence of a tertiary amine. Components are in the following ratio, pts.wt: phenol-formaldehyde resin in terms of dry mass - 100, modifier in terms of dry mass - 20-120, inorganic fibre filler - 40-300, mineral powder - 10-90, lubricant - 1-8.
EFFECT: invention improves strength properties of frictional moulding material based on phenol-formaldehyde resins and eliminates organic solvents from the production process.
2 tbl, 7 ex
SUBSTANCE: resin dispersion contains: (I) epoxy resin in amount of 30-100 wt % and novolac resin in amount of 0-70 wt % with respect to weight of both resin components, (II) a codispersant based on castor oil ethoxylate, hydrogenated castor oil ethoxylate, alkylphenol ethoxylate, fatty alcohol ethoxylate, oleic acid ethoxylate, oxo alcohol ethoxylate, alkoxylate of fatty alcohol and/or polyvinyl alcohol, in amount of 4-18 wt % with respect to total weight and (III) optionally additional ordinary additives in amount of 0-20 wt % with respect to total weight.
EFFECT: invention enables to obtain a resin dispersion during processing of which no environmental pollutants are released.
13 cl, 1 ex
SUBSTANCE: invention relates to technological processes and can be used in producing moulded articles for structural and electrical purposes. The method involves producing binding material by mixing phenol-formaldehyde resin and polyvinyl acetate emulsion, mixing the binding material with reinforcing material in form of pieces of glass fibre and drying the obtained mixture. Calcium stearate is used when producing the binding material. The reinforcing material used is 4-6 cm pieces of glass fibre. The binding material is produced using 14-20 wt % polyvinyl acetate emulsion, 71-77 wt % phenol-formaldehyde resin and 3-9 wt % calcium stearate. The binding material and the reinforcing material are mixed in equal ratio with respect to dry residue. Before mixing the binding and reinforcing materials, the binding material is turned into a foamed state. The volume of air bubbles ranges from 40% to 50% of the total volume of the dispersion system.
EFFECT: improved physical and mechanical properties of the obtained moulding material.
SUBSTANCE: composition contains novolac-type phenol-formaldehyde resin, urotropin, azobisisobutyronitrile gasifier, processed chrysotile asbestos, butadiene-nitrile rubber, calcium stearate or zinc stearate, dust-like ground quartz with particle size of not more than 0.25 mm which is thermally treated at (700-950)°C, antioxidant naphtham-2 or agidol-2. The method of producing the composition involves heating and plasticising the butadiene-nitrile rubber together with the antioxidant and calcium stearate or zinc stearate. The obtained mixture is then mixed with phenol-formaldehyde resin and powdered filler materials are then added to the obtained composition. Further, the obtained mixture is cooled to temperature (30-50)°C and weighed portions of urotropin and azobisisobutyronitrile are then added to said mixture. The obtained composition is deposited on the article by loading a ground portion into the confined volume of a mould, heated step-by-step to temperature 170°C and held at that temperature, resulting in solidification of the composition, thereby turning into a coating.
EFFECT: high oxidation resistance and stabilisation of process and operational properties of the semi-finished product during manufacture, storage and processing.
3 cl, 6 ex, 2 tbl
SUBSTANCE: invention relates to a coating for pistons, in particular a coating for the guiding part of the piston of an internal combustion engine. A composition for the piston coating contains: a) thermally hardened phenol resin, b) at least, one solid lubricating material, selected from the group, consisting of graphite, MoS2, WS2, BN and PTFE and c) carbon fibre. The composition is applied to minimise friction loss in the internal combustion engine.
EFFECT: obtained coating is characterised by the preferential wear-resistance and preferential friction coefficient.
11 cl, 3 tbl, 1 ex
SUBSTANCE: invention relates to a thermosetting resin-based polymer composite material and fibre-filled material based thereon. The polymer composite material contains thermosetting resol phenol-formaldehyde resin and additionally thermosetting epoxy resin and a thermosetting polyester resin in the following ratio, wt %: thermosetting resol phenol-formaldehyde resin 48-83; thermosetting epoxy resin 3-13; thermosetting polyester resin 14-39. The fibre-filled material contains a thermosetting resin-based polymer composite material and fibre. The fibre used is polyacrylonitrile fibre or glass fibre in the following ratio, pts.wt: thermosetting resin-based polymer composite material 3.2-5.2; fibre 1.0.
EFFECT: avoiding use of expensive and toxic curing agents, low toxicity of the obtained material and production thereof, low cost of the obtained material and high impact resistance thereof.
2 cl, 1 dwg, 2 tbl, 12 ex
SUBSTANCE: invention relates to polymer composition for manufacturing construction materials. Composition contains one or several compounds, corresponding to structure (A2), where A = non-substituted alkylene with number of carbon atoms from 1 to 6 or non-substituted phenylene, R4, R5, R6, R7, Rm, Ro =hydrogen atom and/or non-substituted alkyl group with number of carbon atoms from 1 to 6, m, o=0, 1,2,3, and substituents of R1, R2, R3, R4, R5, R6, R7, Rn, Rm and Ro types can be similar or different and m and o can be similar or different, at least one phenolic resin (B) and at least one stabilising agent (C), selected from compounds, corresponding to structure 3 , in which or , q=or 2 to 10, and anti-oxidants, corresponding to structure (7), in which p = from 1 to 5.
EFFECT: obtaining polymer composition, which contains phenolic acid, suitable for manufacturing construction materials with improved thermooxidative stability.
10 cl, 6 ex
SUBSTANCE: invention relates to production of moulding material for making articles for general industrial purposes. The composition for producing moulding material contains novolac-type phenol-formaldehyde resin, urotropin, butadiene-nitrile rubber, zinc borate, silica fibre filler, calcium stearate or zinc stearate and processed chrysotile asbestos.
EFFECT: improved system of properties (manufacturability, thermophysical properties, strength), which enables production and use of quality articles for general industrial purposes.
2 tbl, 5 ex
SUBSTANCE: invention relates to wood processing industry, particularly for impregnating decorative paper when finishing wood boards. The method involves mixing formalin which is brought to the operating hydrogen ion concentration value, melamine and water. The obtained mixture is heated while monitoring miscibility of the obtained oligomer with water. The mixture is then cooled and carbamide is added when the optimum value of miscibility of the oligomer with water is achieved, and miscibility of the oligomer with water is then monitored. The mixture is cooled when miscibility of the oligomer with water reaches the operating value. After cooling, hydrogen concentration of the mixture is brought to 9.5-10.0. Formalin is brought to the operating hydrogen ion concentration value using a modifier catalyst based on a salt of polyfunctional acid. Said salt is obtained by mixing sodium hydroxide, citric acid and water in the following ratio, pts.wt: sodium hydroxide 9-15; citric acid 16-21; water 69-70.
EFFECT: treating formalin with a modifier catalyst enables to prevent a Cannizzaro reaction, which ultimately reduces melamine consumption, reduces content of free formaldehyde while preserving properties of impregnating oligomers.
1 tbl, 5 ex
SUBSTANCE: composite material for use both in road engineering as construction material with high strength and resistance to water and wind erosion, and as soil, and includes drilling waste, foamed and solidified formaldehyde resin, mineral filler, burnt drilling waste, calcium-containing additive and/or sodium-containing additive, besides, mineral filler is mineral filler selected from the group, containing sand and/or crushed granite, besides, it additionally contains peat, double superphosphate and carbamide resin, bacteriological preparation, consisting of hydrocarbon-oxidising bacteria, and bacteriological preparation, consisting of hydrocarbon-oxidising bacteria, is a consortium of microorganisms ARTHROBACTER OXYDANS and PSEUDOMONAS PUTIDA.
EFFECT: lower toxicity of produced mixture, increased strength and resistance to wind and water erosion, and minimisation of amount of drilling waste in areas of its production by means of its recycling in the area of production.
12 cl, 7 tbl, 45 ex
SUBSTANCE: method involves condensation of cyclopentadiene and formaldehyde at 30°C in a methanol solvent medium in molar ratio of cyclopentadiene to formaldehyde between 1:1 and 1:3 using 33% potassium hydroxide solution in methanol as a catalyst in amount of 0.2 mol/mol of cyclopentadiene and then drying the product in a vacuum at 100-110°C until constant weight for 2-3 hours. Aprotic donor-acceptor solvent of the dimethylformamide or dimethylsulphoxide type is added to methanol in an amount equal to 4 times the weight of 33% potassium hydroxide solution in methanol at the step for mixing reagents. The binder can be used in making casting moulds for precision casting nonferrous metals primarily.
EFFECT: high degree of binding formaldehyde with cyclopentadiene, high output of the polymer binder.
2 tbl, 12 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to hybrid binding agents based on epoxy triphenolic resin designated for reinforced plastics with enhanced corrosion resistance and thermal stability and to methods for their preparing. A binding agent comprises epoxy triphenolic resin, plasticizing agent as a diluting agent representing resin DEG-1, resol-phenolformaldehyde resin SF-340A as a hardening agent and mixture of acetone, ethyl alcohol and petroleum and/or coal toluene as a solvent. Anti-static additive, antipyrene additive, crystalline sodium alumosilicate and a filling agent can be added to the binding agent composition additionally. A filling agent can be in forms of monolith or hollow thread-like crystals, finely divided powder-like filling of monolith, hollow, scaly and fibrous particles. The combination of components taken in the definite ratios and carrying out a method for preparing a binding agent at enhanced temperatures and in the definite sequence of addition of components into reactor and assigned temperature-temporal regimens of their stirring and dissolving provides the improvement of properties of the binding agent. Monolith composites as product of hardening binding agents elicit improved physical-mechanical, heat-physical, electric and anti-static properties with the density value 0.96-1.1 g/cm3, the mass content of nonvolatile substances 55-63% and the gelatinizing time 4-8 min at temperature 160-200°C. The claimed invention can be used in preparing prepregs by impregnation method of glass-organo-coal-filled filling agents, among them caproamide, basalt, polyphene and fibers with different lubricants, dressings and other coatings.
EFFECT: improved and valuable properties of binding agent.
50 cl, 3 dwg, 67 tbl, 20 ex
SUBSTANCE: invention relates to an environmentally friendly board, particularly an environmentally friendly board with zero carbon dioxide emission during manufacture thereof and high content of fibre, which is made of powder from reject printed-circuit boards, as well as a method of making said board. Material for making the environmentally friendly board, which is intended for pressing, contains: 1-69 parts powder, obtained from processing printed-circuit boards, 1-70 parts wood-fibre powder, 1-20 parts cross-linking agent, 1-10 parts water repellent and 1-12 parts carbon fibre based on a weight ratio.
EFFECT: board has good processability, high moisture resistance, high fire resistance and high cross-breaking strength.
10 cl, 1 tbl, 21 ex
SUBSTANCE: bitumen composition includes petroleum road bitumen BND 90/130, SKS-30ARKM-15 or SKS-30ARK rubber and polyethylene polyamine production wastes as an adhesive additive, with the following ratio of components, wt %: BND 90/130 bitumen - 83-93, SKS-30ARKM-15 rubber - 5-10 and polyethylene polyamine production wastes - 2-7 or BND 90/130 bitumen - 86-95, SKS-30ARK rubber - 3-7 and polyethylene polyamine production wastes - 2-7. The method of producing the bitumen composition is carried out by mixing bitumen while heating with a rubber-containing component and an adhesive additive, wherein the rubber is added in the form of 8-12% solution in an organic solvent, wherein the solvent used is hydrocarbons with final boiling point of no higher than 130°C. Preparation of the rubber solution in the solvent is carried out at 40-50°C while mixing for 5-6 hours. The obtained rubber solution and adhesive additive are then added to the bitumen. The mixture is homogenised for 3-4 hours while gradually raising temperature to 160-170°C. Further mixing is carried out until achieving 97% removal of the solvent. The remaining amount of solvent is removed by blowing with nitrogen.
EFFECT: obtaining a homogenous bitumen binder, having improved physical and mechanical properties.
4 cl, 2 tbl