Method of obtaining water epoxide dispersion

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining water epoxide dispersion, used for impregnating concrete and wooden constructions in order to ensure their water-proofness, obtain anti-corrosion, decorative, electro-insulating coatings, as well as for impregnation of fabrics and for other purposes. Method consists in the following: epoxide component (A) and aliphatic difunctional compound (B) are brought into interaction with ratio A:B from 95:5 to 30:70 at temperature 50÷90°C during 1÷5 hours. Reaction is carried out in presence of tertiary amine or dimethylamine catalyst in amount from 0.01 to 5% of reagents weight until content of epoxide groups in component A decreases to from 5 to 70% of initial quantity. Epoxide ingredient represents mixture of cycloaliphatic or aliphatic resin with aromatic epoxide resin, containing ≥ 2 epoxide groups in molecule, with their ratio 3:97 to 97:3. Aliphatic difunctional compound represents compound selected from group including acid, alcohol, oxyacid. To obtained product of interaction initial component (A) is added with their ratio from 5:95 to 95:5. Further, mixture is mixed during 5÷25 minutes, four equal portions of distilled water are added with intervals from 5 to 75 minutes, and concentration of main substance is brought to 10÷70%.

EFFECT: obtaining stable water epoxide dispersion, containing product of interaction with residual epoxide groups, in absence of solvents and surface-active substances.

2 tbl, 11 ex

 

The invention relates to the field of production of aqueous dispersions based on epoxy resin used for impregnation of concrete and wooden structures to ensure their water resistance, as well as causing corrosion protection, decorative, insulating coatings, impregnation of fabrics and other purposes.

A method of obtaining water emulsions on the basis of epoxy resins by introducing an organic solvent and emulsifier noniongenetical type, followed by stirring at 51-79°C and the introduction of water (see RF patent №2154081 from 12.01.1999,).

The disadvantages of this method are the introduction noniongenetical emulsifiers and organic solvents, reducing the strength of hardened materials and their adhesion to polar surfaces, as well as the impossibility of its realization with the use of other types of epoxy resins except Dianova.

The closest prototype of the proposed solution is the method of obtaining the aqueous epoxy dispersion, comprising a step for the product of the interaction of polyethylene glycol (difunctional connection) N.M. from 4000 to 9000 and diglycidylether ether of bisphenol a with amoxicillinno from 180-700 in a molar ratio of glycol to apachegroup from 3:1 to 5:4 in the presence of a Lewis acid in an inert solvent type toluene followed by the addition of surface-active is wow compounds and water, and further mixing with an epoxy resin (see U.S. patent 4246148 from 20.01.1981 year).

The disadvantages of the described method are the absolute predominance in the product of the interaction of hydroxyl above epoxypropane that leads to the exhaustion of the past and, as a consequence, it is not possible to obtain when using the composition of high-strength materials, and the dispersion of inert solvents and surface-active substances, which impair the properties of the material and polluting the environment.

The aim of the present invention is to remedy these disadvantages, i.e. the production of stable aqueous epoxy dispersion containing the product of the interaction with the residual epoxy groups, allowing for the use of it to cure specific hardeners, and does not contain solvents and surfactants, which are factors contributing to the deterioration of the material properties and the environment.

This objective is achieved in that in the process of obtaining the aqueous epoxy dispersion as the epoxy component (A) take the mixture of cycloaliphatic or aliphatic resins, aromatic epoxy resin, containing ≥2 epoxy groups in the molecule in a ratio of 3:97 to 97:3, and as difunctional compounds (B) used acids, alcohols, oxyacids where is Oseni a:B is from 95:5 to 30:70, and the process is conducted in the presence of catalyst the tertiary amine in an amount of from 0.01 to 5% by weight of the reactants at a temperature of 50÷90°C for 1÷5 hours to reduce the content of epoxy groups in the component And from 5 to 70% of the original quantity, then the product of the interaction type of the source component in a ratio of from 5:95 to 95:5, stirred for 5÷25 minutes and added in four equal portions at intervals of 5÷75 minutes distilled water, bringing the concentration of the basic substance to 10÷70%.

Example 1.

In a reactor equipped with a stirrer and heating load 30 mass parts of cycloaliphatic epoxy resin brand UE-632, representing 3.4 epoxycyclohexyl - 3',4' epoxycyclohexanecarboxylate and 30 mass parts of the aromatic epoxy resin brand REN-3, representing diglycidyl ether of resorcinol. The temperature in the reactor was raised to 60°C. and a mixture of resins (component a) is stirred for 10 minutes. Then charged to the reactor sabotinova acid (component B) in an amount of 40 mass parts, i.e. with a ratio a:B=60:40 and 2 mass parts of the catalyst is triethanolamine. The mixture is stirred at 70°C for 3 hours, after which the content of epoxy groups in the component And is reduced to 50% from the original, and the carboxyl component B is almost exhausted, which confirms the formation of forcontent. To receive nomu forcontent add another 60 mass parts of the component and after stirring for 10 minutes 4 equal portions with an interval of 40 minutes load 250 mass parts of distilled water, bringing the concentration of dry matter up to 64%. The resulting aqueous dispersion stariway in corrosion-resistant container.

Examples 2÷11 carried out analogously to example 1 when the parameter is changed in accordance with table 1.

The properties of the resulting aqueous epoxy dispersions by the present method are given in table 2, which shows their advantages compared to analogue and prototype.

The method of obtaining the aqueous epoxy dispersion, namely, that spend interaction epoxy component (A), which is a mixture of cycloaliphatic or aliphatic resins, aromatic epoxy resin, containing ≥2 epoxy groups in the molecule, at a ratio of 3:97 to 97:3, and aliphatic difunctional compounds (B)selected from the group comprising acid, alcohol, hydroxy acids, with a ratio a:B is from 95:5 to 30:70, at a temperature of 50÷90°C for 1÷5 h in the presence of a catalyst tertiary amine or amine in an amount of from 0.01 to 5% by weight of the reactants, to reduce the content of epoxy groups in the component And from 5 to 70% of the original quantity, then the product of the interaction type of the source component (A) at a ratio of 5:95 to 95:5, stirred for 5÷25 min, and add four equal portions of distilirovanoy with intervals from 5 to 75 min, increasing the concentration of the basic substance of 10-70%.



 

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5 cl, 3 tbl, 4 ex

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12 cl, 3 tbl, 2 ex

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2 tbl

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2 tbl, 3 ex

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1 tbl, 4 ex

FIELD: chemistry.

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2 cl, 2 ex

FIELD: chemistry.

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2 cl, 1 tbl, 5 ex

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3 ex

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1 tbl, 2 ex

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2 tbl, 4 ex

FIELD: chemistry.

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2 cl, 5 tbl, dwg

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59 cl, 9 tbl

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2 tbl

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14 cl, 3 tbl, 6 ex, 1 dwg

FIELD: chemistry.

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3 cl, 1 tbl, 6 ex

FIELD: chemistry.

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4 cl, 2 tbl

FIELD: chemistry.

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EFFECT: primer with improved technical properties is obtained.

13 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a composition that can be used for protection of metal surfaces of whatever machinery in contact with corrosion provoking media against corrosion. The composition includes the following components with their ratio in wt %, i.e. 100 of polymer binding epoxy dianic pitch, 20 to 30 of epoxyurethane oligomer modifier, 42 to 48 of organo-silicon amine hardener - γ-aminopropyletoxysilane, 25 to 30 of mineral filler, i.e. titanium dioxide (rutile), 22 to 25 of chromium phosphate inhibiting pigment, 20 to 60 of organic solvents, 3 to 4 of aerosol thixotropic agent, 10 to 20 of anti-rust additive of metal zinc. Xylene or acetone, either butyl acetate, or ethylcellosolve are used as organic solvents.

EFFECT: production of benzene-and water-proof coat with high adhesion properties.

2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention concerns method of protection and recovery of corroded metal surfaces operating in abrasive wear conditions and aggressive media, e.g. in fertiliser transportation, and can be applied in power-producing, chemical and mining industry for rusted equipment repair. Method involves application of primer layer on metal surface with further drying till aftertack, insulation layer with further drying till aftertack, and external layer with further drying to complete hardening. Primer layer is made of composition including the following components, wt %: 20.0-30.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-25.0 of Versamid 115 polyamide solidifier, 12.0-25.0 of pigments, 12.0-25.0 of fillers, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, the rest is organic solvents. Insulation layer is made of composition including the following components, wt %: 20.0-35.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-30.0 of Versamid 115 polyamide solidifier, 5.0-10.0 of fillers, 10.0-50.0 of micaceous iron ore, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, 0.8-1.2 of structurising additive, the rest is organic solvents. External layer is made of composition including the following components, wt %: 20.0-40.0 of acrylic or polyether hydroxyl-containing resin, 11.0-22.0 of aliphatic isocyanate solidifier, 10.0-20.0 of pigments, 10.0-40.0 of micaceous iron ore, 5.0-10.0 of fillers, 0.2-0.6 of polysiloxane modified organically, 0.8-1.2 of structurising additive, 0.6-2.4 of aluminum powder, the rest is organic solvents. Composition of external layer includes additionally Metatin Catalyst tin dibutyllaurate in amount of 0.05-0.5 wt % as drying accelerator.

EFFECT: enhanced corrosion resistance of coating.

cl, tbl, 2 ex

FIELD: hydraulic insulating materials for hydraulic insulation and corrosion prevention of concrete, metal and reinforced concrete structural surfaces.

SUBSTANCE: claimed composition contains: butadiene-styrene thermoelastomer, diepoxy resin, filler (carbon black), solvent (toluene), pigment filler, containing aluminum and iron hydroxides and additionally indene-coumarone resin, waterproofing agent (liquid polymethylsiloxane), and stabilizer.

EFFECT: composition with high adhesion to concrete and metal surface and improved strength.

2 tbl

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