Composition for deicing coating

 

(57) Abstract:

The invention relates to compositions for coating, lowering of the adhesion forces between the ice and the various surfaces and protect from exposure to atmospheric factors, and can be used for de-icing of metal structures, radar installations (antennas and domes shelters), refrigeration, etc. Describes a composition for deicing coating, which includes a silicone polymer binder (30-40 wt.%), consisting of polydimethylsiloxane and polydimethylsiloxane and toluene. Different composition to the fact that as filler (9-18 wt.%) use talc or a mixture of talc with Belita, and / or barite, as a pigment (6-15 wt.%) - iron oxides and (or) salts of transition metals and solvent as toluene. The invention allows to obtain coverage, combining good de-icing and protective properties. 3 table.

The invention relates to compositions for coating, lowering of the adhesion forces between the ice and the various surfaces and protect from exposure to atmospheric factors. The invention can be used to combat Obiedinenie.

Known two-layer anti-icing coating (author's certificate N 739080) based on tetraethoxysilane containing first layer tetraethoxysilane in the amount of 1-30%, integrated catalyst - 0,18-5,2 about. % and an organic solvent, and the second polyethylsiloxane liquid in the amount of 5-20 wt.%, adgezionnoaktivnojj the catalyst is 0.3 to 1.2 weight. % and an organic solvent. The composition for the first layer coating is prepared by mixing an organic solvent with a complex catalyst, the resulting solution add tetraethoxysilane, stirred for 24 - 48 hours. The duration of mixing is determined by the need to "aging" of the solution. The shelf life of such composition is low and therefore prepare it before use. The composition for the second layer of the coating is prepared by dissolving polyethylsiloxane in an organic solvent and then adding to the resulting solution adgezionnoaktivnojj catalyst. For the thus obtained coating pullout force of ice from the protected surface is 0.04 - 0.08 kgf/cm2(method of determining the adhesion strength is not given, so the one shown here, then the data cannot be recognized AB is the creation of the first and second layers described coating using a composition with a very high content of volatile organic solvents (in the first layer 65 to 80 wt.%).

Known composition to obtain anti-icing coatings "Cretan" (author's certificate N 1386630) based polyorganosiloxane in the amount of 42 - 49 wt.% in an organic solvent containing gidrofobizirovannym organosiloxane or paraffin or stearic acid filler in the amount of 2-15 wt.%, selected from the group of silicon dioxide, titanium dioxide, zinc oxide, expanded graphite, basalt fiber, and mixtures thereof. The bond strength of the ice cover does not exceed 0.09 kg/cm2(method of evaluating the adhesion strength is not given). The hardness of the coating on the device M-3 is 0.4 s. units of the Critical angle of the rolling drops of water from the coating is 25 - 30 degrees. The service life of the coating, prevents icing, for example, refrigerators, air platforms, aircrafts, is only 2 years. In addition, the preliminary stage of waterproofing filler, allow to obtain a coating with high performance, requires dry components of the composition and long-term degassing at elevated temperature in the range of 290 - 420oC.

Known composition for protivoobledinitelnoy coverage (certificate of authorship N 1712388). The uke is from.%, selected from the group of zinc oxide, magnesium oxide, titanium dioxide or expanded graphite, filling, gidrofobizirovannym organic modifiers in the form of chloroform, or tar production ethylsilicate, or polyorganosiloxanes liquids in quantities 16-30 wt.%, and the solvent. In the preparation of the above composition as the solvent used low-toxic, fireproof chloroform in the amount of 25 - 60%, and the solvent is freon 11; 12; 113. For existing currently views fluorinated hydrocarbons are involved in the formation of the "ozone hole", so environmental requirements, their use is undesirable. The anti-icing property of the coating is caused mainly by the presence in the composition to obtain gidrofobizirovannogo filler, and hydrophobicity is a complex energy-intensive technological operation. The adhesion of such coatings to the substrate is satisfactory. While life coverage is only 3 years.

Also known polymer composition for deicing coating (N. P. Kharitonov, L. N. Krasil'nikova, I. I. Voinova, - Sat. works "Research in physics and chemistry tion of polymethylphenylsiloxane and polydimethylsiloxane, and the solvent is toluene. The mechanism of formation of anti-icing coatings based on migration in the surface layer of the low molecular weight polydimethylsiloxane. Spontaneous delamination occurring in the polymer system, leads to the formation of the coating of two layers, each of which performs its own function: the inner layer provides adhesion of the coating to the surface, and the outer - reduces the force of traction on the ice. The adhesion of the coating to the substrate from the composition is 1 to 2 points. The bond strength of the ice with films of this composition is 0.3 to 0.4 kgf/cm2.

Despite the large number of compositions, the problem of anti-icing through the use of coatings is still not solved satisfactorily on one or more aspects. Considered anti-icing coatings have low adhesion to ice, snow and other crystalline forms of water. However, providing relatively good protection from icing over a relatively short period of time, 2 - 3 years, known coating does not retain the anti-icing properties over a longer period.

Known protective coating is which is 90 - 95 deg., but this degree of hydrophobicity insufficient to ensure good anti-icing properties. For example, organosilicate composition for protective coatings OS-12-03 (N. P. Kharitonov, V. A. Moles, centuries Ostrovsky "Organosilicate compositions", the Catalogue, L. Science. 1980, S. 20), including kinetically stable mixture of organosilicon polymers, filler (mica, talc, pigment (iron oxides and salts of transition metals) and the solvent (toluene). The coating formed on the basis of the specified composition is weatherproof and can be used to protect metal, concrete and other structures, as well as various equipment outdoors. However, it does not have de-icing property.

The closest to the invention by the combination of essential features is a composition for deicing coating (L. N. Krasil'nikova, I. I. Voinova, N. A. Nikitina, N. P. Kharitonov - "Organosilicon compounds and materials based on them", Leningrad , Nauka, 1984, S. 155). This composition comprises as a binder (40 - 60 wt.%) polydimethylsiloxane and polydimethylsiloxane, forming a thermodynamically incompatible, quickly rasla is their problem de-icing of surfaces of various materials through the creation of a Russian raw materials deicing composition with a simple cooking technique, drawing and forming, maintaining and improving the protective properties of the coating, reducing the adhesion of ice to the floor while maintaining or increasing the adhesion of the coating to the substrate, increasing the service life of the de-icing of the protective coating.

The task can be solved as follows.

Composition for deicing coating comprising silicone polymer binder consisting of polydimethylsiloxane and polydimethylsiloxane, and a solvent as toluene, as filler includes talc or a mixture of talc with Belita, and / or barite, and as a pigment - oxide and (or) salts of transition metals, in the following ratio, wt.%:

Organosilicon polymer binder is 30-40

Filler - 9-18

Pigment - 6-15,

Solvent - Rest

Composition for anti-icing coatings can be prepared by dispersion of fillers and pigments in a toluene solution of silicone polymers. The process is carried out in ball or bead mills within 24 - 48 hours. For applying the composition on a protected surface applied methods of paint technology: brush, roller, credit at a temperature of 180oC for 3 hours, or curing occurs at ambient temperature with pre-made in the composition of the hardener.

The invention as described above, the composition for protective coatings OS - 12-03 includes as filler talc and pigment - oxides and salts of transition metals.

It is known that the introduction of a filler in the form of talc increases the geometric path of aggressive components to the substrate, i.e., makes the impact of external factors on the protected surface. Barite also has a high shielding ability and, in addition, gives the coating a high density and increases the resistance to abrasion. The latter property is important in the operation of certain types of radio installations in the field.

Bleaches is of interest as a cheap product produced by double separation of slag from the production of silicothermic ferrochrome, silicocalcium, ferroalloys, etc. In its properties it is close to barite.

As pigments in the claimed compositions can be used oxides and salts of transition metals, such as oxides of chromium, iron, titanium, zinc. Row properties of the coating. For example, the oxides of iron and chromium are anti-corrosive.

To confirm the proposed intervals included in the inventive composition ingredients tested. The results of the tests are illustrated are shown in tables examples, compositions containing the inventive composition limits specified in the claims of intervals of values of each ingredient (table 1), and data on technical characteristics of the coating on the basis of the claimed composition (table 2).

Use in the claimed compositions known filler and pigment allows the use of their properties are shown in compositions for protective coatings. However, their use in compositions for anti-icing coatings on the basis of two-component polymer system does not affect the kinetics of the separation, causing the anti-icing properties of the coating. Thus, the claimed composition for deicing coating allows to obtain coverage, combining higher anti-icing properties of the coating on the basis of spontaneously stratifying polymer systems with the properties of the protective coating.

It is important to note the following: at present allicesia structures from atmospheric aggressive factors (for example, enamel XB-518 - Paints and coatings materials. Technical requirements and quality control". Moscow, Chemistry, 1988, S. 239 and enamel XB-124 - journal "Paints their application.", N 3, 1992, S. 20).

Table 3 shows the comparative properties of coatings based on the declared composition, prototype, OS - 12-03 and enamel group XB.

Summarizing the data of table 3, we can conclude that the claimed composition in such important characteristics of the anti-icing coating as hardness, wetting angle and the adhesion strength of ice exceeds the prototype. On the protective properties superior weatherproof organosilicate coatings OS-12-03 and vinyl chloride corrosion of the enamel. Thus, the invention provides a synergistic effect, which is manifested in the increase of the quantitative indicators of the anti-icing properties compared with known anti-icing coatings and increase the quantitative indicators of the protective properties in comparison with known indicators of protective coatings. As a consequence, the service life of the anti-icing coating on the basis of the claimed compositions in icing conditions 1.5 times the service life of the protective coating brand XB, recommended is 12-03, and 4-10 times less than the enamels group XB; methods of preparation and application of the composition is very simple and practically feasible; the composition includes only domestic and non-deficient raw materials, and Blanches is a waste of metallurgical production.

Composition for deicing coating comprising silicone polymer binder consisting of polydimethylsiloxane and polydimethylsiloxane and toluene, wherein the composition further comprises talc or a mixture of talc with Belita and/or barite and iron oxides and/or salts of transition metals in the following ratio, wt.%:

Organosilicon polymer binder - 30 - 40

Talc or a mixture of talc with Belita and/or barite - 9 - 18

The oxides and/or salts of transition metals - 6 - 15

Toluene - Rest

 

Same patents:

The invention relates to cryopedology and can be used to remove snow and ice formations during the operation of the airfield and road surfaces during the period of low temperatures and to prevent formations of glacial deposits

The invention relates to utilities and road service and can be used for winter maintenance of roads to prevent ice formation
The invention relates to de-icing compositions based on mixtures of salts that eliminate icing, causing melting of snow and ice on roads

The invention relates to methods of prevention (tracks), designed to help prevent sticking, primerzanie and freezing of bulk materials and to combat dust in the low negative temperatures

FIELD: road servicing industry.

SUBSTANCE: the invention is dealt with the road servicing industry, in particular with the methods of extirpation of ice covering on motorways, bridges, flyovers, and also aerodromes. The method of the roadway covering slipperiness prevention provides for application of a roadway ice covering suppressing reactant based on acetate, in the capacity of which use a solution with pH=7-9.5, containing components in the following ratio (in mass %): magnesium acetate 13-17, potassium acetate 8-16, potassium hydrocarbonate 5-8, potassium carbonate 2-6, water-insoluble impurities 0-6, water - the rest. The roadway ice covering suppressing reactant may additionally contain a fired limestone in amount of 3-5 mass % in terms of calcium oxide. The method of production a roadway ice cover suppressing reactant for a roadway covering slipperiness prevention provides for mixing of a component containing a magnesium compound, iced acetic acid and water, in the capacity of the component containing the magnesium compound is used brucite, the stirring is exercised in two stages: first they continuously agitate brucite with water and a part of iced acetic acid in a stoichiometric ratio at the temperature of 50-70°C within 50-80 minutes, then, not terminating mixing at the same temperature in the produced mix with pH=5-6 add the rest of ice acetic acid and then add potash in amount exceeding by 0.1 - 6 % the stoichiometric ratio and continue agitation till production of the roadway ice cover suppressing reactant - a solution with pH = 7-9.5 with the above indicated composition. The used roadway ice cover suppressing reactant has composition mentioned above. The technical result consists in - maintenance of the low temperature at the reactant usage, ensuring the passing ice covered roadways motor vehicles metal corrosion protection and at use as the airfield runways coatings - the corrosion protection of metals used in aircraft designs as well. The roadway coating treated with the reactant has a high coefficient of adhesion, that reduces the accident rate on the roadways.

EFFECT: the invention ensures, that the roadway coating treated with the reactant decreases the accident rate on the roadways.

6 cl, 2 tbl, 4 ex

FIELD: chemical industry.

SUBSTANCE: invention relates to preparations used for prevention and removal of snow-ice formations in roads. An anti-glaze of ice preparation comprises the following components, wt.-%: calcium chloride, 15-50; sodium chloride, 48.5-83.5; potassium ferricyanide, 0.2-0.5, and sodium dihydrogen phosphate, 0.3-1.0. Anti-glaze of ice preparation in granulated form is resistant against caking, inhibits corrosion of metals and reduces inhibitory effect of chloride on plants.

EFFECT: improved and valuable properties of preparation.

FIELD: special reagents.

SUBSTANCE: invention relates to substances for applying on surface to prevent or diminish adhering ice, mist or water on it, for prevention of icing, in particular, to anti-glaze of ice reagents. The composite comprises the following components, wt.-%: calcium chloride, 25-32; urea, 2-7; sodium nitrite, 0.03-1.0, and water, the balance. Invention provides preparing the composite harmless for environment that doesn't show harmful effect on environment, doesn't corrode road coatings, and inhibits corrosion of metals. Agent shows economy and high effectiveness.

EFFECT: improved and valuable properties of reagent.

2 cl, 1 tbl

FIELD: road-transport industry.

SUBSTANCE: method includes applying substance on asphalt-concrete mixture. As substance silicon-organic modifier is used, loss of which at 1 m2 of area of pre-placed on road asphalt-concrete mixture at temperature 80-100°C is no less than 0,3-0,5 kg. After applying modifier, asphalt-concrete mixture is rolled.

EFFECT: higher efficiency, no corrosive effect on metals, effective at temperature above -20°C.

2 cl, 3 tbl, 3 ex, 1 dwg

FIELD: domestic chemistry.

SUBSTANCE: invention relates to agents using against misting and icing windshields in transports, sight glasses in agent of individual protection and can be used in living conditions for prevention showcase glasses icing. The composition comprises the following components, wt.-%: polyoxyethylene glycol ester of synthetic primary higher alcohols of (C12-C14)-fraction as a surface-active substance, 6-25; urea or thiourea, or mixture of urea and thiourea, 1-20; glycerol, 5-25; ethylene glycol, 5-41; dye, 0.0005-0.02, and a solvent, the balance. Propyl alcohol as propanol-1 or propanol-2 can be used as a solvent. The composition elicits an anti-misting and anti-icing properties, provides two-sided protection of sight glasses of transport agents and agents of individual protection in cooling the protecting glass surface up to -40°C, elicits the prolonged protective effect, it doesn't solidify at the environment temperature below -40°C and doesn't require the special technical devices for its applying.

EFFECT: valuable properties of composition.

3 cl, 1 tbl, 10 ex

FIELD: Composition of an anti-icing water solution for roads surface treatment.

SUBSTANCE: the invention is pertaining to production of composition of an anti-icing water solution for roads surface treatment against a winter slipperiness (snow rolling-ups, a glaze ice, black ice) n the roads and streets in cities and settlements. The composition contains, in mass %: 20-27 calcium chloride, 5-30 ethyl alcohol, 0.3-5 corrosion inhibitors (borax or sodium nitrite or their mixture), the rest - water. The technical result is - an increase of effectiveness of the composition application, an increase of friction coefficient due to a decrease of the ice density, a raise of the composition ice melting capacity.

EFFECT: the invention ensures an increase of effectiveness of the composition application, an increased friction coefficient and a decreased ice density, a raise of the composition ice melting capacity.

1 cl, 1 ex, 2 tbl

FIELD: materials for miscellaneous applications.

SUBSTANCE: grain mixture comprise, in mass %, 15-45% of compressed first salt of alkaline or alkaline-earth metal and 85-55% of the second salt of alkaline or alkaline-earth metal. The first salt is a waterless hygroscopic salt.

EFFECT: reduced cost.

14 cl, 4 dwg

FIELD: preventive means against freezing and sticking of loose materials to walls of mining and transport equipment; prevention of dusting on interim roads, open-cut mining; protection of rolling stock against freezing and blowing-off of loose materials, coal and peat for example.

SUBSTANCE: preventive means is made in form of mixture of solvent and thickening additive of oil nature. Used as solvent are distillation residues of coke and by-product process and/or by-products of production of butadiene, isoprene, isobutylene, ethylene both independently and in mixture with distillation residues of production process of polymers, pyrolysis residues, benzene, styrene and distillation residues of production of butanol, isobutanol, 2-ethyl hexanol acid and 2-ethyl hexanol. Solvent may additionally contain gas oils of thermal and catalytic cracking and gas oils of coking process. Used as thickening additives are mineral and synthetic oils of all kinds, mixture of used oils, oil sludge, oil residues and oil fuel. Components of thickening additive and solvent are used at any combination. Novelty of invention is use of wastes of various processes of oil and petroleum chemistry products.

EFFECT: extended field of application; cut costs; enhanced ecological safety.

5 cl, 1 dwg, 2 tbl, 17 ex

FIELD: suppression or reduction of icing on surfaces by means of antiicing compounds.

SUBSTANCE: proposed anti-icing compounds contain succinic acid and/or succinic anhydride and neutralizing base, sodium hydroxide, potassium hydroxide or ammonium hydroxide in particular. When mixed with water anti-icing compounds form succinates in the course of reaction which causes fast liberation of heat sufficient for melting ice on surface. According to other versions, anti-icing compounds contain glycol which inhibits repeated icing on cleaned surface. Specification gives description of sets of compounds for melting snow and ice.

EFFECT: enhanced efficiency of melting snow and ice on aircraft and territories of their operation.

29 cl, 11 dwg, 7 tbl, 2 ex

FIELD: motor-car industry; other industries; methods of production of the anti-icing reactant.

SUBSTANCE: the invention is pertaining to the method of production of the anti-icing reactants for maintenance of roads in winter. The method of production of the anti-icing reactant based on sodium chloride and calcium chloride provides for mixing of the sodium chloride with calcium chloride and their heating and drying. Sodium chloride crystals are coated with the atomized solution of calcium chloride and dried in the "boiling bed" kiln with production of the double-layer granules, the outer layer of which is composed out of calcium chloride. Sodium chloride crystals are coated with calcium chloride in two phases. The forming small particles of calcium chloride are fed into the cyclone, whence the cyclone dust of the calcium chloride is fed into the mixer for intermixing with the wet crystals of sodium chloride. The produced anti-acing reactant has the improved physicochemical thermodynamic properties.

EFFECT: the invention ensures, that the produced anti-acing reactant has the improved physicochemical thermodynamic properties.

3 cl, 1 ex, 2 tbl

Up!