RU2462488C1 - Polymer composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: polymer composition contains epoxy resin, a hardener - polyethylene polyamine, a solvent in form of a mixture of solvents: butyl acetate, acetone, toluene in ratio of 12:26:62 and additionally phenol, with the following ratio of components in wt %: epoxy resin ED-16 30-40, polyethylene polyamine 3-4, phenol 1-2, mixture of solvents: butyl acetate, acetone, toluene in ratio of 12:26:62 - the balance.

EFFECT: invention increases strength and biostability of concrete and reinforced concrete articles.

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Description

The invention relates to building materials and can be used for impregnation of concrete and reinforced concrete products.

Known compositions of polymer compositions based on epoxy binders used for putties in the manufacture of floors from piece materials (Chemically resistant mastics, putties and concrete based on thermosetting resins / N.A. Moshchansky, I.E. Putlyaev, E.A. Puchnina et al. M .: Publishing House of Literature on Construction, 1968, 184 pp.).

However, such compositions have insufficiently high resistance in acids and low biological resistance in the environment of mycelial fungi.

A known composition comprising an epoxy resin, a hardener is polyethylene polyamine, a solvent is a mixture of solvents: acetone, ethyl cellosolve, butyl acetate, butyl alcohol, toluene in a ratio of 0.7: 0.8: 1: 1.5: 5, additionally dibutyl phthalate and copper sulfate, and as a filler - black soot (RU 2280061, IPC C09K 3/10, C09D 5/34, C08L 63/02, publ. 07.20.2006).

The known composition increases the chemical resistance in a solution of sulfuric acid and imparts fungicidal properties to the compositions, but within certain limits.

The technical result is to increase the strength and biostability of concrete and reinforced concrete products.

The essence of the invention lies in the fact that the polymer composition comprising an epoxy resin, the hardener is polyethylene polyamine, as a solvent contains a mixture of solvents: butyl acetate, acetone, toluene in a ratio of 12:26:62 and additionally phenol, in the following ratio, wt.%:

epoxy resin ED-16 30-40 polyethylene polyamine 3-4 phenol 1-2 solvent mixture: butyl acetate, acetone, toluene in the ratio of 12:26:62 rest

A method of manufacturing a polymer composition is as follows. Produce a weight dosage of the components. Then, a measured amount of ED-16 brand epoxy is poured into a clean mixer, a mixture of solvents: butyl acetate, acetone, toluene in a ratio of 12:26:62, hardener is polyethylene polyamine, after thorough mixing, the required amount of phenol is added to the mixture and thoroughly mixed until homogeneous mixtures.

The studies were carried out on samples 1 × 1 × 3 cm in size from concrete polymers made by the following technology. First, samples are made from a cement composition based on Portland cement and water, the amount of which is taken from the calculation of obtaining a cement paste of normal density. For the manufacture of the composition, the following components were used - Portland cement M 400, which meets the requirements of GOST 10178-95. For mixing, tap water was used that meets the requirements of GOST 23732-79.

After manufacturing, the samples hardened for 1 day in molds under normal temperature and humidity conditions, then outside the molds in a steaming chamber operating according to the following conditions: raising the temperature to 90 ° C for 2 hours; holding at t = 90 ° C for 6 hours; temperature reset within 1 hour to normal.

The obtained samples were impregnated with the proposed polymer compositions, the compositions of which are given in table 1.

The impregnation was carried out by dipping the samples into the polymer composition and holding them for 10 minutes.

Kinks of the samples showed that the depth of their impregnation was 1.5-2 mm across all faces. The impregnation of the samples with known compositions, even with an exposure time of up to 20 minutes, made it possible to provide an impregnation depth of up to 0.5 mm

The results of physical and mechanical tests of cement samples impregnated with a polymer composition are given in table. 2.

Tests of samples impregnated with the polymer composition for biostability are carried out according to GOST 9.049-91 by methods 1 and 3. The following types of mold fungi are used as test organisms: Aspergillius niger, A.flafus, A.terreus, Penicillium cuclopium, P.funiculosum, P .chrysogenum, Paecilomyces varioti, Chaetomium globosum, Trichoderma viride. The results are shown in table. 3.

From the results given in table. 2 and 3, it follows that the compositions, depending on the ratio of the components, have different indicators of strength and biostability.

The proposed compositions of polymer compositions in comparison with known solutions can improve the strength and biostability of concrete and reinforced concrete products.

Table 1 Components The compositions of polymer concrete mixtures, wt.% one 2 3 four 5 6 7 Epoxy resin ED-16 thirty 31 33 35 37 40 71 Polyethylene polyamine 3.0 3,1 3.3 3,5 3,7 4.0 7.8 Phenol one 1,1 1.3 1,5 1.7 2 - Solvent mixture: butyl acetate, acetone, toluene in the ratio of 12:26:62 66 64.8 62,4 60 57.6 54 - Solvent mixture: acetone, ethyl cellosolve, butyl acetate, butyl alcohol, toluene in 0.7: 0.8: 1: 1.5: 5 ratio - - - - - - 7.1 Dibutyl phthalate - - - - - - 8.5 Copper sulphate - - - - - - 5,6

table 2 The properties Performance for formulations 0 * one 2 3 four 5 6 7 Prismatic compressive strength, MPa 39 46 48 fifty 52 54 52 39 * - test of a sample of Portland cement stone and not impregnated with a polymer composition

Table 3 Structure The degree of growth of mushrooms, points Biological stability characteristic according to GOST 9.049-91 Method 1 Method 3 0 * 3 5 Non-mushroom resistant one 3 5 Non-mushroom resistant 2 one 3 Negribostoky 3 0 one Mushroom resistant four 0 0 Fungicidal (fungicidal zone 3 mm) 5 0 0 Fungicidal (fungicidal zone 4 mm) 6 0 0 Fungicidal (fungicidal zone 5 mm) 7 0 0 Fungicidal (fungicidal zone 2 mm) * - test of a sample of Portland cement stone and not impregnated with a polymer composition

Claims (1)

A polymer composition comprising an epoxy resin, a hardener is polyethylene polyamine and a solvent, characterized in that it contains a solvent mixture of solvents: butyl acetate, acetone, toluene in a ratio of 12:26:62 and additionally phenol in the following ratio, wt.%:
Epoxy resin ED-16 30-40 Polyethylene polyamine 3-4 Phenol 1-2 Solvent mixture: butyl acetate, acetone, toluene in the ratio of 12:26:62 rest