Method of curing novolac resin |
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IPC classes for russian patent Method of curing novolac resin (RU 2440373):
Epoxy binder and reinforced profile fibre-glass based on said binder / 2425852
Binder contains the following (pts.wt): epoxy-novolak resin with epoxy equivalent weight of 169-181, containing 2.5-3.6 glycidyl groups per mol of the epoxy resin - 100, hardener - anhydride of methyl-endo-cis-5-norbornene dicarboxylic acid - 80-95, curing accelerator - 0.1-2.0, and target additives - 0.5-2.0. The binder has acceptable application life for producing fibre-glass.
 Epoxy resins containing cycloaliphatic diamine based curing agent / 2418816
Invention relates to curing compositions for epoxy resin based systems. The invention discloses a curing composition for epoxy resins, containing a mixture of 1,3-bis(aminomethyl)cyclohexane and 1,4-bis(aminomethyl)cyclohexane, a prepolymer curing composition for epoxy resins, containing a product of reacting epoxide with a mixture of 1,3-bis(aminomethyl)cyclohexane and 1,4-bis(aminomethyl)cyclohexane, as well as a method of preparing the prepolymer curing composition, a method of gluing two substrates, an aqueous epoxy resin and versions of curing compositions and methods of applying a coating on a substrate.
 Triethanolamine perchlorato (triflato)metal inner-complex coordination polymers as additives for synthetic polymers / 2398793
Invention discloses at least one triethanolamine perchlorato (triflato) metal inner-complex coordination polymer with monomer links of formula
 Adhesion activating agent of rubbers to brass-coated metal / 2380385
There is described adhesion activating agent of rubbers to brass-coated metal, corresponding alloy of blocked by ε-caprolactam and higher fatty acids dy- and (or) polyisocyanate with cobalt stearate, boric acid and secondary phenylenediamine. Mentioned alloy is encapsulated by powder-like inorganic matter, selected from group, including colloidal silicic, kaolin, bentonite, zinc oxide, at ratio (wt %): 60-20 and 40-80 correspondingly.
 Epoxide resin hardening compositions / 2346012
Present invention pertains to versions of compositions, which are used in making powder coatings for pipes. In the first version, the composition based on epoxide resin contains a mixture of a hardening agent and a primary amino alcohol. In the second version, the hardening composition based on epoxide resin contains a hardener-primary amino alcohol, which reacts with a phenol resin derivative. The amino alcohol used has the following structural formula:
 Novel stabilising sysem for halogenated polymers / 2341542
Stabilising system includes, at least, (a) one perfluoralkansulfonate salt and (b), at least, one or several indoles and/or ureas and/or alkanoamines and/or aminouracils, in which indoles have general
 Vulcanicola rubber compound / 2236423
The invention relates to the production of vulkanizetas rubber compound, the vulcanizates on the basis of which have high resistance to thermal-oxidative aging
 Thermosetting composition / 2201947
The invention relates to thermosetting resin compositions, which can find use as coatings, adhesives, compounds, adhesives for laminates
 Polymer composition / 2186802
The invention relates to polymeric compositions used in the repair of oil and gas pipelines both in summer and winter conditions, the use of metal couplings, as well as casting compounds in electronics, electrical engineering, construction and other purposes
 Rubber mixture / 2437906
Rubber mixture contains the following in pts.wt: fluororubber SKF-26-100, calcined magnesia 5-6, calcium hydroxide 5-6, technical carbon T-900 20-22, barium sulphate 10-12, low-molecular weight polyethylene 1.0-1.1, dibutyl sebacate 1.0-1.1, diphenylol propane 1.6-1.7, octaethyl tetraamidophosphonium bromide 0.5-0.6, filler - magnetic powder Nd-Fe-B modified with 4.5-5.0% solution of γ-aminopropyl triethoxysilane in ethyl alcohol 50-500.
 Polyesters containing aluminium/alkali metal or alkali/titanium, having high reheating capacity, improved colour and transparency / 2434900
Composition, which is catalysed by aluminium or one or more alkali-earth metals, or alkali metals to which a titanium compound is added, contains: a thermoplastic polyester polymer and a) at least one aluminium and a compound thereof, which form an aluminium cation, b) at least one alkali or alkali-earth metal and a compound of an alkali or alkali-earth metal, which form their cations, and c) particles containing titanium nitride. The particles are present in amount ranging from 1 ppm to 50 ppm of the total weight of the polyester composition and have average particle size ranging from 1 nm to 500 nm. The composition is obtained via polycondensation of molten polyester polymer in the presence of aluminium atoms and at least one atom of an alkali-earth or alkali metal. Further, titanium nitride particles are added to the polymer. A bottle preform is made from the polyester composition.
 Polymer matrix of lithium-ion accumulator electrolyte and production method thereof / 2430934
Polymer matrix is obtained by dissolving a copolymer of trifluorochloroethylene and vinylidene fluoride with molecular weight from 10000 to 500000 in an organic solvent with addition of a polyethylene glycol acrylate copolymer grafted thereto, having molecular weight from 100 to 3000, taken in weight ratio from 1:0.5 to 1:2.0 respectively. The polymer matrix of the gel-electrolyte contains a substance responsible for transporting alkali metal ions (for example lithium). The method of producing the polymer matrix of the gel-electrolyte of a lithium-ion electrolyte involves dissolving a copolymer of trifluorochloroethylene and vinylidene fluoride and a copolymer of polyethylene glycol acrylate in an organic solvent. A base or alkali metal and a catalyst are added to the obtained mixture and grafting is carried out. The reaction temperature ranges from 0 to 90°C.
 Protective coating / 2427601
Protective coating has a base consisting of two layers of intertwined rows of threads attached by radiotransparent material, with a film of hydrogenated carbon ingrained with particles of ferromagnetic material is deposited on each layer through vacuum sputtering. On the surface of the film which is deposited on the outer layer of the intertwined rows of threads, there is a lacquer coating obtained from a suspension which contains a fluorinated polymer, zinc sulphide with a hexagonal crystal structure, selenium, sulphur, a catalyst, a wetting agent and a curing agent.
 Gas-tight modified perfluorosulpho-cationite membrane and method of producing said membrane / 2426750
Invention relates to the technology of producing gas-permeable membranes which can be used in fuel cells at high operating temperature (100°C and higher, methanol fuel cells, low- and high-pressure water electrolysis cells etc). The membrane is made from a copolymer of tetrafluoroethylene with perfluorosulpho-containing vinyl ether and a tertiary modifying perfluorinated comonomer - perfluoro-2-methylene-4-methyl-1,3-dioxalane or perfluoroalkylvinyl ether containing 1 or 3 carbon atoms in the alkyl, and a polymeric or inorganic modifier. The method of making the membrane involves contacting a perfluorosulpho-cationite membrane with a liquid composition containing an ion-exchange perfluorosulpho-polymer, a polymeric or inorganic modifier and a solvent. The perfluorosulpho-polymer with functional sulpho-groups SO3M, where M is a hydrogen, ammonium or alkali metal ion, has equivalent mass of 800-900, and is similar on structure to the membrane polymer. Contacting is carried out at 18-80°C. Particles of the modifier are formed on the surface or inside the membrane at 18-120°C.
 Gel polymer electrolyte and current source using it / 2424252
Gel polymer electrolyte includes polymer matrix obtained by means of interaction by grafting to copolymer of trifluorchloroethylene and vinylidene fluoride of copolymer of polyethylene glycol acrylate in organic solvent, at content of polyethylene glycol acrylate of 20-75%, where in grafted copolymer the content of links of vinylidene fluoride is 25-35%, with further introduction of lithium salt in amount of 5 to 20% in terms of 100 weight parts of matrix.
Light-converting material and composition for producing said material / 2407770
Described is light-converting material containing a matrix and at least one composite which converts UV radiation to radiation of a different colour, with particle size from 10 nm to 1000 nm, selected from a group ZnO:Zn and rare-earth element compounds of formula: Mex aAy bRz c , where Me denotes a metal, selected from a group comprising yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, holmium, erbium, ytterbium, aluminium, bismuth, manganese, calcium, strontium, barium, zinc or mixture thereof; A denotes a metal selected from a group comprising cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, holmium, erbium, terbium, ytterbium, titanium, manganese; R is an element selected from a group comprising oxygen, sulphur, boron, titanium, aluminium and/or compounds thereof with each other; a, b and c denote the charge on the Me ion, A or R, respectively, x≥1, 1.0 ≥ y ≥ 0.0001, z is defined by ax + by = cz. The invention also describes a composition for producing said material, containing the following in wt %: said composite - 0.001-10.0; matrix-forming component - the rest.
Protective coating composition / 2402585
Composition contains: epoxy-diane resin, polyamide hardener, filler - finely dispersed quasicrystalline filler of the Al-Cu-Fe system with particle size less than 10 mcm, ultra-fine fluoroplastic powder and organic solvent.
 Conductive ink and method of making said ink / 2388774
Invention relates to conductive ink compositions which are widely used in electronic engineering. Described is a conductive ink composition which contains a metal complex compound obtained by reacting at least one metal or metal compound of formula (1) with a compound based on ammonium carbamate or ammonium carbonate of formula (2), (3) or (4), and at least one target additive. Described also is a method of making a metal-containing film by depositing the said conductive ink composition and treatment thereof via oxidation, reduction, thermal treatment, treatment with infrared radiation, UV radiation, electron beams or laser.
Polymer composite repair material / 2386653
Invention relates to cold setting polymer compositions based on epoxide resins and can be used in different areas of mechanical engineering when repairing worn out and broken components and units of different machines, assemblies and equipment. Described is a polymer composite repair material containing a basic component based on epoxide resin ED-20 and a hardening component consisting of an amine hardener (polyethylene polyamine) and a plasticiser (mixture of dibutyl phthalate with triethylene glycol in the following ratio, in pts. wt: dibutyl phthalate (DBP) 45-55; triethylene glycol (TEG) 55-45). The basic component and the hardening component contains fine-dispersed filler in form of Aerosil 175 or Aerosil 380, schungite, silicon carbide, tungsten carbide, carbon nanotubes.
Non-formaldehyde-containing curable aqueous composition based on polyvinyl alcohol / 2430124
Non-formaldehyde-containing curable aqueous composition contains polyvinyl alcohol combined with starch or modified starch or sugar, a multi-functional cross-linking agent and, optionally, a catalyst. The cross-linking agent is non-polymeric polyaldehyde, non-polymeric polyacid, salt thereof or anhydride. Nonwoven articles are obtained by bringing the composition into contact with fibrous components. Further, the mixture is cured to obtain a hard thermoset polymer.
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FIELD: chemistry. SUBSTANCE: curing takes place in with the participation of aromatic dinitriles in the presence of antimony (III) chloride or aluminium chloride at temperature 150-200°C for 10-30 minutes. EFFECT: invention enables to perform curing without release of secondary gaseous products, increase heat resistance and improve physical and mechanical properties of polymer materials. 4 ex
The invention relates to a method of curing Novolac resin which can be used in various technical fields as high strength and resistant binder for plastics, laminated and fibrous materials, adhesives and films. Known (Fufe C.A., McKinnon M.S., Rudin A., Tchir W.J. // Macromolecules - 1983. - V.16. - P.1216-1219, G.E. Maciel, Chuang I.-S., L. Gollob // Macromolecules - 1984. - V.17. - P.1081-1087, Hatfield G.R., G.E. Maciel // Macromolecules - 1987. - V.20. - P.608-615), where traditionally for curing Novolac resin is used urotropine (hexamethylenetetramine). The formation of complex three-dimensional insoluble polymers, and between the molecules of the oligomer formed methylene bridging group. The presence of such fragments determines the low operating temperature and low strength properties, which is one of the main disadvantages of the obtained polymer materials. Moreover, the curing process is excreted nitrogen, which creates difficulties in producing high-strength filled composites. The closest in technical essence and the achieved effect is a method of curing (Kelusky E.C., Fufe C.A., McKinnon M.S., Rudin A., Tchir W.J. // Macromolecules - 1986. - V.19. - P.329-332)adopted for the prototype, based on the use of methenamine for curing Novolac resin. The process is performed by heat treatment for 15-30 minutes at 150-160°C and then at 180°C for 1 hour. The technical is a mere result of the invention, that process goes without allocation of by-products and provides improved resistance to thermal oxidative degradation and improving the strength characteristics of materials, which is achieved due to the formation of imidates connections between molecules of the oligomer, which is much stronger than methylene and able also to the formation of intermolecular hydrogen bonds. To achieve the technical result of the proposed use as a hardener aromatic dinitrile. The process is at a temperature of 150-200°C for 10-30 minutes in the presence of Lewis acids, chloride of antimony (III) or aluminium chloride according to the following scheme:
The resistance according to the TGA (5°C/min, air) is 340-380°C, which corresponds to 10%weight loss. The structure is confirmed by IR spectroscopy. Thus, the spectra of the cured product are characteristic absorption bands at 1653 cm-1(C=N) and 1103 cm-1(WITH-O). Receive press materials was carried out in the following way. A melt mixture of 12.8 g of Novolac resin, 21.2 g of 1,4-dinitriles and catalyst in the amount of 2.67 g of aluminium chloride or 2.285 g of the chloride of antimony (III), heated to 170°C. and cured for 5 minutes, was poured into the mold, preheated to 180°C., and extruded at a pressure of 70 to 75 MPa at 1,80°C for 10-15 minutedelta impact strength (GOST 4647-80), was 80.4-85.8 MPa, and ultimate tensile stress tensile (GOST 4648-71) 130.2-134.6 MPa. The proposed method is confirmed by the following examples below curing Novolac resin. Example 1. In a round bottom flask at room temperature was downloaded 12.8 g of Novolac resin, 21.2 g (0.1 mol) of 1,4-dinitriles and 26.7 g (0.2 mol) of aluminium chloride are thoroughly mixed and placed in alloy rose, heated to 160°C. after 15 minutes the product was removed from the reaction flask in a weak alkaline solution and boiled for 10-15 minutes. Then the obtained product was filtered on a porous funnel SCHOTT. Was dried in a vacuum Cabinet at 60-70°C to constant weight. Example 2. In a round bottom flask at room temperature was downloaded 12.8, Novolac resin, 21.2 g (0.1 mol) of 1,4-dinitriles and 20.025 g (0.15 mol) of aluminium chloride are thoroughly mixed and placed in alloy rose, heated to 180°C. after 15 minutes the product was removed from the reaction flask in a weak alkaline solution and boiled for 10-15 minutes. Then the obtained product was filtered on a porous funnel SCHOTT. Was dried in a vacuum Cabinet at 60-70°C to constant weight. Example 3. In a round bottom flask at room temperature was downloaded 12.8 g of Novolac resin, 21.2 g (0.1 mol) of 1,4-dinitriles and 22.85 g (0.1 mol) of the chloride of antimony (III), carefully paramashiva and was placed in the alloy rose, heated to 180°C. after 20 minutes, the product was removed from the reaction flask in a weak alkaline solution and boiled for 10-15 minutes. Then the obtained product was filtered on a porous funnel SCHOTT. Was dried in a vacuum Cabinet at 60-70°C to constant weight. Example 4. In a round bottom flask at room temperature was downloaded 12.8 g of Novolac resin, 21.2 g (0.1 mol) of 1,3-dinitriles and 20.025 g (0.15 mol) of aluminium chloride are thoroughly mixed and placed in alloy rose, heated to 180°C. after 15 minutes the product was removed from the reaction flask in a weak alkaline solution and boiled for 10-15 minutes. Then the obtained product was filtered on a porous funnel SCHOTT. Was dried in a vacuum Cabinet at 60-70°C to constant weight. As can be seen from the above data, the proposed method of curing Novolac resin dinitrile favorably with that simple, by-products are not obtained materials have a higher resistance to thermal oxidative degradation and physico-mechanical properties. Above listed complex practically useful properties determines the positive effect of the invention. Cured so Novolac resin may be used in various technical fields as high strength and resistant coatings, adhesives for plastics, the stack is of Plasticos, films and adhesives. Method of curing Novolac resin, characterized in that the curing takes place with the participation of aromatic dinitriles in the presence of chloride of antimony (III) or aluminium chloride at a temperature of 150-200°C for 10-30 minutes
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