Compound

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to production of compound operated under moisture-saturated medium conditions, said compound being intended for packing small defects in concrete and reinforced-concrete structures, in particular for injection into filtering fissures of power dams, for restoration of rock massives in watered mines, for use in automobile mastic compositions to create anticorrosive coatings on moisture-affected surfaces, as cavitation-resistant coating material used in by-wash practice, in manufacture of artificial decorative facing tiles, in reparation of marble and granite articles, etc. Compound contains, wt %: epoxide resin or epoxide resin blend 38,8-43.8, dibutyl phthalate 4.9-5.5, amine hardener 8.6-9.6, iron minium 37.52-44.05, ultrafine mixed filler 0.38-0.45, low-molecular weight synthetic rubber 1.8-2.0, and process additive 1.2-1.4, said ultrafine mixed filler being selected from diamond blend, carbon black, and aerosil, and said process additive being fatlike substance selected from group including tar, solid oil, CIATIM grease, lanoline, and/or oligomer selected from laprol, poly(propylene glycol), poly(ethylene glycol), glycidyl ether, and mixture thereof.

EFFECT: improved performance characteristics of compound.

1 tbl, 6 ex

 

The invention relates to compositions based on epoxy resins, working in conditions of intense flavored designed for sealing deep and shallow defects of concrete and concrete structures, in particular for injection filter cracks dams of hydroelectric power plants, to restore the mountain ranges in flooded mines, can be used in the compositions of automatic for anticorrosive coating surfaces exposed to moisture, as a cavitation resistant coating material in the practice of the operation of spillway structures, in the manufacture of artificial decorative tiles, repair of marble and granite products, etc.

Known repair composition according to the patent of Russian Federation №2186076 (publ. Bull. No. 21, 27.07.2002 year), including epoxy resin, amine hardener AF-2, disperse the filler, the rheological additive. The composition has a high content of metal and is intended solely for the repair of metal surfaces, because the strength of attachment to the surface is ensured by the fact that thermal expansion coefficient of the composition corresponds to the same ratio of metal, the rheological additive of the class of silicon dioxide prevents the settling of the filler and runoff composition with vertical surfaces and thereby which allows a low flowability, what prevents the use of known composition for repair of narrow and deep cracks and crevices.

Known composition used for corrosion protection of equipment operating in a strongly - and mid-aggressive environments, as the USSR №861379 (publ. Bull. No. 33, 07.09.81 g)containing epoxy resin, amine hardener, dibutyl phthalate as a plasticizer, dispersion of the filler, modifier. The disadvantages of this structure should include the presence of a solvent, which adversely affects the properties of adhesive joints, reducing their strength and stability, as well as expanding binder in the preparation of the composition. The composition is mixed immediately before use and applied manually by brush, roller or paint sprayer with a thin layer (50-60 μm) curing for 4-5 hours at 20°C. a Set of components and their ratio limit application of this composition to cases where it is necessary the application of a thin layer.

Known epoxy putty used to fill in deep and shallow defects on a variety of surfaces, operating in the saturated zone of flavored, RF patent No. 2100394 (publ. Bull. No. 36, 1997.12.27), adopted for the prototype containing epoxy resin, amine hardener, dibutyl phthalate as a plasticizer and mixed filler.

Application to the operation spot filler aluminum powder and aluminum powder gives the putty thixotropic properties, that is not possible to use the composition as a cement slurry when the injection is not available deep defects and leaks (pores, capillaries, cracks) concrete, reinforced concrete structures or rock in order to increase the solidity in the process of strengthening or repair. Since the maximum thickness of the layer of filler in one pass application without drawdown is only 7 mm, to fill in deep cracks need multiple drawing that reduces operational convenience. Known composition has low adhesion to wet surfaces and requires its preliminary drying, i.e. the reliability and durability of the cured composition depend on the quality of surface preparation (the cost of cleaning and surface preparation is about 40% of the cost of protective and repair activities). When this coating has low survivability, hence the introduction of the curing agent immediately before its application, and the high content of filler in the composition, leading to an increase in its density and strength of the composition, at the same time increases and the initial viscosity affects the elastic properties of the composition. At high concentrations of filler increases the resolution of the film structure of a polymer binder, due to its scarcity in the composition, and therefore an overall decrease in the strength of the filled material.

The disadvantage of the composition of the prototype is also significant brittleness of the cured composition, preventing its use as a cavitation-resistant coating. Due to the weak adhesion of links on the contact surface of the filler particles of spherical or teardrop shape with epoxy component of the composition and at the same time the low elasticity of the composition have significant concentrations of residual stresses in polymer volume adjacent to the filler particles that cause shock loads to the initiation of cracks in the specified epoxy compositions near solid surfaces, leading to the destruction utverzhdenii putty.

The objective of the proposed technical solution is the creation of the formulation of the compound with a wide range of applications and high technological and operational properties by optimizing the modifying action of additives and their compatibility with the polymer matrix through the implementation of conditions for provision of cavitation-resistance compound, its curing directly in the aquatic environment at low temperature with the exclusion of shrinkage, delamination and the need to prepare the surface of the substrate and with a simultaneous increase density without increasing the initial viscosity.

The problem is solved announced jemym compound, includes epoxy resin, dibutyl phthalate, amine hardener and mixed filler. The peculiarity lies in the fact that the compound contains an epoxy resin or mixture of epoxy resins, as a spot filler red iron oxide and ultrafine filler selected from the group comprising diamond furnace, carbon black, Aerosil, optionally a low molecular weight synthetic rubber and technological Supplement - fat-like substance selected from the group comprising tar, grease, grease tsiatim, lanolin and/or oligomer selected from the group comprising Laprol, polypropylenglycol, polyethylene glycol, glycidyloxy ether or a mixture thereof, in the following ratio of components, wt.%:

The proposed compound differs from prototype other according to the chemical nature of the mixed filler, one of the components of the mixture belongs to the mineral fillers (iron oxide red), and ultrafine component of the mixture or also refers to the mineral filler (Aerosil)or refers to organic fillers (diamond mixture, carbon black), whereas in the prototype both components are metals; another form of filler particles - most of the filler is represented by crystals of the trigonal form (tabular, tabular, elongated) with a developed specific surface (in the prototype is a big part of the filler is spherical or teardrop shape); reduced the content of the filler in the composition; the availability of synthetic low molecular weight rubber and technological additives.

Use as a filler mixture of iron oxide red and ultrafine filler provides an exception shrinkage during curing, increasing the density of the cured composition without increasing the initial viscosity, since the fine particles are located inside the enriched binding regions formed larger particles and displace the polymeric binder. This improves the wetting of particles, a binder and increases the fluidity of the proposed composition and mechanical t the VA compound in dry condition. In addition, it eliminates the need for surface preparation of the substrate, which improves the economic performance of the work when using the claimed composition.

Ultrafine filler acts additionally as an antioxidant stabilizer properties of the composition, preventing oxidative dextrally (delamination).

Technological additive, acting as a latent (hidden) hardener improves the adhesion properties of the composition, can be used in high humidity conditions, enhancing the properties of the amine hardener which did not dissolve in water and allowing to cure the composition at a temperature of 4-6°in the aquatic environment, promotes the formation of a sufficiently rigid spatial structure.

Low molecular weight rubber increases the molecular mobility of the epoxy component of the composition, helps to increase the elasticity of the composition, which improves adhesion and reduces the fragility utverzhdenii composition by reducing residual stresses at the contact interface of the filler and the binder. Thus the combined use of a complex according to the chemical nature of the mixed filler with a well-developed specific surface of the particles and the reactive modifier allows you to combine high is their strength under static and cyclic (including cavitation) loading chemical resistance to aggressive environment.

The interaction of epoxy resin and nizkomolekulyarnogo synthetic rubber leads to the acceleration of the curing process, since the rubber is involved in the formation of the spatial structure of the final polymer.

As the epoxy resin used epoxy uncured resin grades ED-14, ED-16, ED-20, ED-22, which represents an oligomeric products on the basis of epichlorohydrin and diphenylolpropane (GOST 10587-84) and epoxy-hydantoinyl resin grade EG-10 (TU 84.415-118-86) or mixtures thereof.

As the plasticizer using dibutyl phthalate (GOST 8728-88).

As a mixed filler used iron oxide red (GOST 8135-74, THE 301-10-011-90) and ultrafine filler.

As ultrafine filler used diamond charge (nanopowder) (TU 84.415-115-87) with a specific surface area of particles 400-450 m2/g with an average diameter of 5.0-6.0 nm, or carbon black mark THERMOX-277 HIT (TU 38.41515-90) with a specific surface area of particles 150 m2/g with an average diameter of 8.0-23,0 nm, or Aerosil grades a-380 (GOST 14922-77) with a specific surface area of particles 380 m2/g with an average diameter of 5.0 to 15.0 nm.

As a synthetic low-molecular rubber using rubber stamps: SKN-18-1A, SKN-26-1A on THE 38.303-01-41-92 and SOPS-3A on THE 003326-86, which is a low molecular weight copolymers of butadiene with Acrylonitrile, sod is rashimi minor amount of carboxylic groups.

As the hardener used amine hardeners: ethylenediaminetetra AF-2 (TU 2494-511-00203521-94), which is a condensation product of formaldehyde, phenol and ethylene diamine, and diethylenetriaminepenta up-D or 2-(Triethylenetetramine)phenol UE-T on THE 6-05-241-331-82 representing the condensation products of formaldehyde and phenol with Diethylenetriamine and Triethylenetetramine respectively.

As technological additives used fat-like substance consisting of esters of high molecular weight alcohols, acids, and free of high molecular weight alcohols: tar, grease, grease tsiatim according to GOST 11110-75, lanolin or oligomers: Laprol, polypropylenglycol, polyethylene glycol, Picadilly ether or a mixture of fat-like substances and oligomer.

Preparation of the compound is as follows. In a mixer with the water jacket download preheated to 50°With epoxy resin, add pre-cooked plasticized, including low molecular weight rubber, dibutyl phthalate, technological additive, stirred for 30 minutes. Then in 2-3 doses, depending on the sample, add red iron oxide, pre-sifted and mixed with ultrafine filler. At the end of the dosing spend circulation of the reaction mass using cheshirecat is Asosa for 1-2 hours at a temperature of 30-40° C. curing agent is administered prior to use of the compound. While the persistence of the obtained compound is 55-60 minutes.

For experimental verification of the proposed structure of the compound were made 5 recipes, three of which showed optimal results.

Part 1 - due to high viscosity and low effective flowing property does not provide effective sealing of deep narrow slits and cracks.

Part 5 - possesses mechanical properties are insufficient to repair structures operating under high loads.

The composition of the formulations 2-4 was tested by injection deep (up to 2 m) of the slit width from 0.1 to 8 mm in the mountain base of the dam in terms of the Sayano-Shushenskaya hydroelectric power station and is preparing for commercial use. The proposed compound will meet the long existing need in epoxy composites with high technical and economic efficiency.

The compound includes epoxy resin, dibutyl phthalate, amine hardener and mixed filler, characterized in that the compound contains an epoxy resin or mixture of epoxy resins, as a spot filler red iron oxide and ultrafine filler, vybrannyi group, including diamond furnace, carbon black, Aerosil, optionally a low molecular weight synthetic rubber and technological Supplement - fat-like substance selected from the group comprising tar, grease, grease tsiatim, lanolin and/or oligomer selected from the group comprising Laprol, polypropylenglycol, polyethylene glycol, glycidyloxy ether or a mixture thereof, in the following ratio, wt.%:

Epoxy resin or
the mixture of epoxy resins38,8-43,8
Dibutylthe 4.9 to 5.5
Amine hardenerthe 8.6 and 9.6
Red iron oxide37,52-44,05
Ultrafine filler0,38-0,45
The low molecular weight synthetic rubber1,8-2,0
The above is a fat-like
substance and/or the above-mentioned oligomer1,2-1,4
Epoxy resin or
the mixture of epoxy resins38,8-43,8
Dibutylthe 4.9 to 5.5
Amine hardenerthe 8.6 and 9.6
Red iron oxide37,52-44,05
Ultrafine filler0,38-0,45
The synthetic rubber
low-molecular-weight1,8-2,0
The above is a fat-like
substance and/or the above-mentioned oligomer1,2-1,4



 

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2 tbl

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2 tbl, 3 ex

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1 tbl

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2 tbl, 9 ex

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3 cl, 1 tbl, 4 ex

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1 tbl, 8 ex

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20 ex

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2 tbl

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4 tbl, 2 dwg

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2 tbl

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3 tbl

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7 cl, 2 tbl

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2 tbl

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2 tbl

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3 cl, 2 tbl

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Putty // 2203239
The invention relates to the construction, in particular to the compounds of putty, and can be used for leveling of concrete, plaster and wood surfaces

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EFFECT: improved and valuable technical properties of composition.

4 tbl, 2 dwg

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