(57) Abstract:The invention relates to the field of application of non-stick, anti-adhesion, anti-corrosion coatings and can be used in the manufacture of bakery, confectionery and other products processing industry. The problem to which the invention is directed, is to improve the operational, mechanical, and thermal properties of anti-adhesive coatings and increase their adhesion to the surface of the aluminum grain shapes. Anti-adhesive coating consisting of a film of oxides of tin non-stoichiometric composition obtained by comminution in a pre-heated to 400-450oWith the aluminum surface to form a solution containing the ingredients in the following amounts, wt.%: SnCl45H2About 40-50; ethyl 40-45; isopropyl alcohol 10-15. The inventive coating has high performance, mechanical, thermal properties and good adhesion to the surface of the aluminum grain shapes. The use of the invention allows to increase the resource of grain shapes, and consequently, to reduce the downtime of the conveyor oven and increase its overall performance. table 2. The image is used in the manufacture of bakery, confectionery and other products processing industry.Known fluoropolymer composition for coatings, including pigments, fillers, surfactants, salt of zirconium and suspension of PTFE f-4D .The disadvantage of this composition is a low adhesion to the surface to which is applied a composition.The closest technical solution, selected as a prototype, is a composition for non-stick, anti-adhesion, anti-corrosion coatings obtained by the method of heterologously , including the components in the following amounts, by weight. %: suspension of PTFE f-4D 36,0-43,0 concentration of 50-60% 36,0-43,0 based 57%, including f-4D of 20.5 and 24.5; suspension of PTFE f-4MD concentration of 53% 16,0-20,0, including f-4MD of 8.5 to 10.6; mica ground 2,4-3,5; titanium dioxide 1,0-2,0; Aerosil 1,0-2,5; oxalate of Nickel 1,0-2,0; aluminum powder of 2.0 to 3.0; ethoxylated alkyl phenol of 1.5 to 2.5; polyvinylpyrrolidone 0,7-1,5; polyorganosiloxane 3.5 to 4.5; alcohol is 1,4-butanediol or furfuryl 1,0-2,0; xylene 0,7-1,5; ethyl cellosolve 0,7-1,5; phosphoric acid of 0.2-0.3; 4-amino-2,2,6,6-tetramethylpiperidine 2.0 to 2.5; water the rest.The disadvantage of this arrangement is unsatisfactory fur is istii high temperature loads.The problem to which the invention is directed, is to improve the operational, mechanical, and thermal properties of anti-adhesive coatings and increase their adhesion to the surface of the aluminum grain shapes.This is achieved by the fact that the anti-adhesive coating consists of a film of oxides of tin non-stoichiometric composition obtained by comminution in a pre-heated to 400-450oWith the aluminum surface to form a solution containing the ingredients in the following amounts, wt.%:
SnCl45H2O - 40-50
Ethyl alcohol - 40-45
Isopropyl alcohol is 10 to 15
The specified ratio of the components, the formation is heated to 400-450oFrom the surface of the aluminum coverage form oxides of tin non-stoichiometric composition due to the occurrence of the following reactions :
SnO-->Sn+SnO2.Thus obtained film of oxides of tin non-stoichiometric composition has anti-adhesive properties due to the lack of oxygen in the coating structure.As aluminum bases use ebnoy forms with the aim of decamerone treated with 35% Hcl solution (GOST 3118-77) and washed in flowing deionized water, then for passivation of the working surface of its handle 75-80% solution NGO3(GOST 4461-77) followed by rinsing in flowing deionized water. To seal pestiviruses layer surface is treated 90% solution of N3RHO4(GOST 6552-80). After washing in flowing deionized water, grain shape is heated to 400-450oC and on its surface by a method of pulverizing put a solution prepared from the following ingredients: SnCl4H2O (TU 6-09-3084-82) 40-50%, ethyl alcohol (GOST 18300-87) 40-45%, isopropyl alcohol (GOST 9805-84) 10-15%, then the form is cooled naturally. Table 1 shows the compositions of the tested coatings.Grain shape coated with the surface coating further passed laboratory and pilot tests in terms of the Mtsensk bakery.As criteria of performance properties of the coating were taken, the number of production cycles bread forms prior to the termination of spontaneous separation of baked bread form while turning and the values of the contact angle of the surface with distilled water, determined by the method of "sedentary" drops.In the adopted quality abrasion resistant coatings, some on brasiltri corresponding norms ARE norms UNI M7/European norm EN 154.As a criterion of thermal properties of the coatings were determined number of idle production cycles bread forms to the loss of their operational properties.To compare the operational characteristics of the claimed coating coatings known in the food industry were tested in parallel composition, obtained on the basis of the suspension of PTFE f-4D , and the composition obtained by the method of heterologously . The results are given in table 2.The inventive coating has high performance, mechanical, thermal properties and good adhesion to the surface of the aluminum grain shapes.The use of the invention allows to increase the resource of grain shapes, and consequently, to reduce the downtime of the conveyor oven and increase its overall performance.Sources of information
1. RF patent 2096435, IPC 09 D 127118, 1997.2. RF patent 2087506, IPC 09 D 5/42, C 09 D 5/08, 1997 (prototype).3. Antonov, O. N., Igoshin C. M., Frolenkov K. Y. Antiadhesive coatings based on films of complex oxides is about it consists of a film of oxides of tin non-stoichiometric composition, obtained by comminution in a pre-heated to 400-450oWith the aluminum surface to form a solution containing the ingredients in the following amounts, wt.%:
Ethyl alcohol - 40-45
Alcohol isopropyl - 10-15h
FIELD: processes for applying fluent materials to surfaces to obtain anti-friction surface with the purpose to reduce hydraulic and aerodynamic friction of vehicle moving in liquid and to reduce friction in friction assemblies of machines and mechanisms working in aqueous medium.
SUBSTANCE: method involves obtaining and applying antifriction coating on vehicle body so that specific coating surface energy along liquid streamlines (streamline surface) has negative gradient.
EFFECT: reduced friction due to provision of friction resistance control.
FIELD: processes to apply liquid or fluent material to obtain an anti-friction or anti-adhesive surface, particularly to produce siliconized wrapping paper.
SUBSTANCE: method involves mixing organopolysiloxanes-based silicone composition components; applying the obtained composition on movable paper substrate; heat-treating the obtained coating up to full coating hardening. Above paper substrate is wet-strength paper web with 6-8% moisture content. The paper is preliminary subjected to calendaring operation to obtain 1.0-1.1 g/cm3 density and 250-400 sec. smoothness. Silicone composition is applied by doctoring method, wherein silicone composition from local bath is applied on paper web moving between doctor blade and rear support. At least part of rear support surface in contact area between doctor blade and rear support is resilient. Degree of paper web bending during doctor blade introduction in the rear support is regulated by change in rear support surface resiliency. Unit for silicone composition application comprises doctor and rear support having changeable resiliency at least in contact area between rear support and doctor blade. Doctor blade is installed at acute angle to line perpendicular to rear support base and passing through contact line between rear support and doctor blade. Local bath is arranged in space defined by doctor blade and paper web.
EFFECT: increased application properties and strength of the paper, provision of reliable peeling force to paper separation from adhesive layer within wide temperature range, increased quality of composition application due to increased fullness of composition introduction in surface layer of paper web.
13 cl, 2 dwg
SUBSTANCE: method comprises securing means of the anchor fastening to the surface, applying the lining material on the surface, solidifying the lining, AND drying the lining at a temperature sufficient to the melting of the coating at the means of anchor fastening. The device for anchor fastening is proposed.
EFFECT: enhanced reliability.
16 cl, 1 tbl, 3 ex
FIELD: machine engineering, namely modification of rubbing surfaces of kinematic pairs.
SUBSTANCE: method comprises steps of placing between rubbing surfaces disintegrated mineral composition containing synthetic modification of serpentine produced by diluting in water mixture of α-quartz and magnesium hydroxide at temperature 120 - 170°C and pressure 1.2 - 15.0 at for further formation of crystals. Chrysotile having monocline syngony with coordination numbers 5.0< a< 7.3A°, 9.0<b< 9.2A°, 7.0<c< 7.3A° and with angles β between positive directions of crystallographic axes 90° or 93° is used as seed for producing crystal of synthetic modification of serpentine. Summed value of molar masses of α-quartz and magnesium hydroxide corresponds to molar mass of synthetic modification of serpentine. Composition includes in addition homologs of fullerenes Cm where m ≥ 60 at next relation of components, mass %: synthetic modification of serpentine, 70 - 90; homologs of fullerenes Cm, 10 - 30. Invention allows to form coating with receive friction factor lowered to 0.001, increased hardness HRC 90 - 95.
EFFECT: enhanced wear resistance, increased useful life period of coating, possibility for realizing method with use of oil lubricant and also without any lubricant.
FIELD: anti-adhesion materials.
SUBSTANCE: invention relates to a composition comprising 0.1-4% of mixture of perfluoropolyoxaalkylene carboxylic acids of the general formula: wherein n = 3-50. For preparing colloidal solution of perfluoropolyoxaalkylene acid the composition comprises additionally 1-2% of amidoalcohol of the general formula: wherein n = 0 or 1; m = 1 at q = 1 and m = 2 at q = 0 that is prepared by interaction of dimer and/or trimer of hexafluoropropylene oxide with mono- and/or diethanolamine and water, up to 100. After treatment with the proposed composition surface of solid bodies acquires water-oil-repelling properties and the gluing seam rupture strength is reduced by two orders that accords with strength levels providing by the nearest analog representing a mixture of perfluoropolyoxaalkylene acids in coolants. Invention can be used for decreasing adherence of moldable plastic, crude rubber articles and other polymers to a tool and press-forms.
EFFECT: improved and valuable technical properties of composition.
1 tbl, 2 ex
SUBSTANCE: contamination protector contains fine particles of nitrogen dioxide, aqueous solvent containing alcohol dispersing specified particles of nitrogen dioxide, surface-active substance and splash modifier chosen among alkali metal compound, alkaline-earth metal compound, phosphorus compound, clay mineral and mixtures thereof. Specified contamination protector enters into the composition of specified aqueous solvent. It can be applied onto building board coating.
EFFECT: contamination protector and its adhesion to building board coating are enhanced.
3 cl, 30 dwg, 3 tbl, 30 ex
SUBSTANCE: antifriction coat can be used in gear pumps for reducing friction and wear resulted from corrosion or mechanical effects in tribojoints under effects of chemically active reagents, high temperature and loads on engaged parts to ensure required stable gaps between the said parts. The antifriction coat consists of three layers, i.e. inner, intermediate and upper layers. Note here that the inner layer represents a composition comprising 90 wt % of a polyimide varnish and 10 wt % of chromophosphatealuminic bond, the intermediate layer being made from 100 wt % of a pure polyimide varnish. Finally, the top layer represents a composition containing 90 wt % of polyimide varnish, 8 wt % of colloid graphite and 2 wt % of lecithin. Thickness of the aforesaid inner layer is within the limits of from 8 up to 10 mcm, thickness of the intermediate layer is within the limits of from 16 up to 20 mcm, thickness of the top layer is within the limits of from 24 up to 30 mcm, while the required thickness of the coat is provided by grinding the top layer.
EFFECT: longer life of friction assembly units and parts operated in chemically active environments.
FIELD: personal utensils.
SUBSTANCE: nonstick coating consists of, at least, one first primary layer spread over the base and covered with one or more upper layers on the bases of fluorocarbon resins. Primary layer includes, in the ratio of dry components weight to total composition from 9 to 15 wt %, fluorocarbon resin, from 4 to 5 wt %, polyamidoimidic resin (PAI), from 0.12 to 1.1 wt %, polyether ether keton resin (PEEK), and residual consisting of technological supplements, inert fillers and dispersion media.
EFFECT: invention secures better resistance of the nonstick coating to scratching due to reduced weight content of PEEK in the composition of the first basic layer.
9 cl, 2 tbl