Epoxypolymer solution

FIELD: method for production of epoxypolymer solution useful sealing material in building industry.

SUBSTANCE: claimed epoxypolymer solution contains (mass parts): epoxydyanic resin 100; polyethylene polyamine 15; plasticizer 50; filler 200. Waste from epoxide resin production is used as plasticizer, and waste from haydite production is used as filler. Epoxypolymer solution of present invention is useful, for example as sealing and waterproofing material in rebuilding of damaged concrete and reinforced concrete constructions.

EFFECT: epoxypolymer solution with improved operating characteristics and reduced cost.

5 tbl, 8 dwg

 

The invention is used in construction as the sealing and waterproofing material, as well as the restoration of damaged areas of the concrete elements and concrete structures.

For similar were taken polymeration (RF patent No. 2022943). The composition of the polymer composition including by weight: epoxy resin ED-20 - 100 hardener polyethylenepolyamine (Pepa) - 10...15, filler (waste) - 100...110.

The disadvantages of this material are:

- high cost due to the large consumption of epoxy binder;

the brittleness and low fracture toughness of the cured material.

As the prototype was made of epoxy-phenolic polymeration book Y.A. Sokolov Modified epoxy adhesives and coatings in construction / Wasallowed, E.M. Gottlieb. - M.: stroiizdat, 1990. - S-150). The composition of the epoxy-phenolic polimerrastvora, including mass: epoxy resin ED-20 - 100, phenolic mixture - 100, hardener PEPA - 10, the filler (silica sand ground) - 400.

The disadvantages of this material are:

- content in the composition of complex (substituted) phenol, which is environmentally unsafe, considering the possibility of its selection;

- the need for additional grinding of the filler leads to a rise in the cost of material.

Was the goal of the project to develop otati environmentally safe construction and repair epoxy mortar, with high performance and lower cost.

The composition of the epoxy polimerrastvora includes: a base component (binder), filler, plasticizer and hardener. As a binder used epoxy resin grade ED-20 (GOST 10587-84). Cost reduction was achieved due to the use as component (filler and plasticizer) developed epoxy solution for disposal of industrial productions. As the filler used clay litter - waste production of expanded clay softener - uterine epoxy resin (ITU-I, grade B) - waste production of epoxy resins JSC “Kotovsky LKZ” (Grotowski, Tambov region). Curing was performed using polyethylenepolyamine (PEPA) (TU 2413-357-00203447-99) at room temperature and atmospheric pressure.

ITU-I (STP 6-21-700-1.24-93) is a technology of industrial waste and is a solution of the mixture of resins and products dehydrochlorinating in toluene-butanol or toluene, isolated from the mother liquor from the production of epoxy resins: ED-20, e-40, e-K, e-23. Uterine resin ITU-I must comply with the requirements and standards specified in table 1.

Table 1 - Regulatory requirements for iziko-chemical indicators of ITU-I
No. p.pName of indicatorStandards STF 6-21-700-1.24-93
Grade aBrand B
1AppearanceHomogeneous transparent liquidHomogeneous transparent liquid
2Mass fraction -%45...50Not more than 50
3Color R-RA by iodometric scale, mg of iodine is not darker7-
4Mass fraction of epoxy groups%10...154...15
5Mass fraction of chlorine ion,%, max0,0035-
6Mass fraction of total chlorine,%, no more0,3-
7The purity of the resin solutionLoading must be clean, presence of a single x-impurity, not more than 10 per 1 sq DM-
8Srvc. the viscosity of the resin solution in the viscometer VZ-246 with dia. nozzle 4 mm13...15Not more than 100
9the pH of aqueous extract6...7-

Assessing the impact of the degree of filling and plasticization on f is Zico-mechanical properties of epoxy resin ED-20 was carried out according to the results of short-term tests for compression and lateral bending at room (20° C) and elevated (40 and 60°C) temperatures. Calculation of the composition of the composites were performed in parts by weight (including weight) of epoxy resin ED-20, the mass of which was taken as 100. The results of the tests are presented in tables 2, 3 and figure 1...6.

to 2.67
Table 2 - effect of the number of expanded clay crumbs on the physico-mechanical properties of ED-20
Quantity of clay, including massHar-ka20°40°60°
CompressionBendCompressionBendCompressionBend
0σ,MPato 89.9of 56.420,814,57,98,6
E,MPa1780368060449230,5404
ε,%6,91,5310,04,05of 17.56,66
20σ,MPa55,822,134,815,29,38,3
E,MPa10942755630 1052of 112.8785
ε,%6,40,819,33,22the 17.36,23
40σ,MPa83,324,036,2the 17.316,512,3
E,MPa136431057341458277903
ε,%5,80,79.012,9817,176,01
60σ,MPa79,531,728,518,010,5the 11.6
E,MPa1503348869716523381125
ε,%5,30,578,72,89of 17.05,95
100σ,MPa50,418,016,113,62,278,3
E,MPa123929875261108334897
ε,%the 4.70,517,516,685,46

Table 3 - Effect of plasticizer ITU on the physico-mechanical properties of ED-20
Number of ITU, including massHar-ka20°40°60°
CompressionBendCompressionBendCompressionBend
25σ,MPa24,6-11,9-7,2-
E, MPa853-248-of 89.1-
ε,%to 4.98-10,2-9,9-
50σ,MPa19,223,47,8to 6.196,64,12
E,MPa741864,567,1for 95.235,661,4
ε,%4,633,9916,24,2815,84,89
75σ,MPaa 12.7-6,16-4,3-
E,MPa547-56,8-28,6-
ε,%4,47-15,5-14,9-
100σ,MPa7.414,34,13to 4.522,842,45
E,MPa256445,8to 45.469,625,644,8
ε,%5,64the 4.714,54,8112,1to 5.21
150σ,MPa5,648,794,033,982,182,27
E,MPa152257,134,267,620,539,6
ε,%7,8equal to 4.9719,35,1110,8of 5.29
200σ,MPa2,39-2,27-2,00-
E,MPa16,8-14,9-9,5-
ε,%14,6-18,1-15,9-
300σ,MPa2,05-1,66-1,27-
E,MPa8,6-6,8-6,8-
ε,%22,2-20,3-13,2-

Studies have shown that the use of part epoxy composite waste clay as filler allows you to replace the traditional fillers, specially manufactured, without impairing the material (table 2 and figure 1, 2), which significantly reduces its cost.

With the introduction of the plasticizer is to reduce the viscosity of the binder and improve the conditions of the processing composition. However, reduced strength and stiffness of the composite at room and at elevated temperatures tested (table 3 and Fig. 3, 4).

Based on the criterion of minimum cost of polimerrastvora while maintaining high physical-mechanical features, the istics of the boundary conditions was chosen as the content of the plasticizer in the amount of 50 and 100 hours mass ED-20. The introduction of plasticizer over 100 hours weight is impractical due to the significant reduction in the strength characteristics of the composites. The test results presented in table 4 and in Fig. 5...8.

Table 4 - Influence of the number of filler and plasticizer on the mechanical properties of the ED-20

The composition of the composite, including massHar-ka20°40°60°
CompressionBendCompressionBendCompressionBend
ITU-100Leca400σ,MPa6,66,82,894,02,083,00
E,MPa21764533,120524,662,3
ε,%3,491,068,602,028,44,82
350σ,MPa8,3the 9.73,934,76of 2.262,66
E,MPa 27279244,225332,854,2
ε,%3,721,238,92,286,924,91
300σ,MPa11,17,35,69to 4.524,13to 2.57
E,MPa30758056,914339,451,2
ε,%3,591,26there is a 10.033,1510,55,01
ITU-50Leca250σ,MPa16,314,98,95,596,33,35
E,MPa702163557,821441,467,6
ε,%3,250,9315,22,6115,34,96
200σ,MPa24,716,612,57,058,693,45
E,MPa819144080,925248, 67,6
ε,%4,041,1615,72,9218,15,11
150σ,MPa23,715,011,45,988,143,10
E,MPa792123087,418051,460,6
ε,%4,081,2313,33,3215,95,12

From the above dependencies (Fig. 5...8) shows that the best set of physical and mechanical properties has a composition containing 50 p.m. by weight of plasticizer ITU and 200 hours on the weight of filler.

The authors propose the following structure of polimerrastvora, including by weight:

epoxy resin ED-20 - 100;

- hardener PEPA - 15;

the plasticizer (uterine epoxy ITU-I) - 50;

- filler (waste clay) - 200±25.

We offer epoxy polymeration has:

- lower cost compared to similar due to its composition of waste production;

satisfactory physical and technical characteristics (table 5);

environmental safety is.

Polymeration, including epoxy Dianova resin, amine curing agent, and a mineral filler and a plasticizer, characterized in that it contains as a mineral filler clay chips - waste production of expanded clay, and as a plasticizer - uterine epoxy - waste production of epoxy resins with the following content of components, including mass:

Epoxy Dianova resin ED-20 100

The polyethylenepolyamine 15

The plasticizer (waste epoxy resins) 50

Filler (waste clay) 200



 

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