KR101330037B1 - Epoxy Adhesive Composition for Preservation of Stone Cultural Heritage and Adhesive Uaing the Same - Google Patents

Abstract

The present invention relates to an epoxy adhesive composition for preserving a stone cultural property and an adhesive using the same, and more particularly, by applying an inorganic additive to an epoxy resin applied to preserve the stone cultural property, the thermal expansion coefficient is minimized to preserve the stone cultural property and then the epoxy The present invention relates to an epoxy adhesive composition for preserving stone cultural properties and an adhesive using the same, which can minimize stress applied to stone in resin.

Description

Epoxy Adhesive Composition for Preservation of Stone Cultural Heritage and Adhesive Uaing the Same}

The present invention relates to an epoxy adhesive composition for preserving a stone cultural property and an adhesive using the same, and more particularly, by applying an inorganic additive to an epoxy resin applied to preserve the stone cultural property, thereby minimizing the coefficient of thermal expansion. The present invention relates to an epoxy adhesive composition for preserving stone cultural properties and an adhesive using the same, which can minimize stress applied to stone in an epoxy resin after preservation treatment.

Most of the stone cultural assets such as pagoda, stone Buddha, and stele remain among the national treasures or treasure-class cultural assets, and they are located outdoors, and they are located outdoors and are produced by industrialization in addition to natural reasons such as snow, rain, and microorganisms or moss. Due to air pollution and acid rain, the original appearance and materials are severely damaged by weathering. Therefore, interest in preservation and restoration of weathered or artificially and naturally damaged stone cultural properties is increasing, and the preservation of actual stone cultural properties is recognized as an important technology of cultural technology.

Preservation of stone cultural properties should be established first through diagnosis of weathering and damage degree of cultural properties. Once the direction of preservation is determined, treatment with appropriate polymer is performed to prevent further damage and weathering after washing cultural properties. The direction of cultural property preservation should be established. However, many studies that have been carried out or carried out so far are still only to diagnose the cause of the damage to the weathering of cultural properties. Once the diagnosis of cultural property has been made, the treatment according to the diagnosis should be followed. Generally, the treatment of cultural property is done with treatment developed for stone in Europe. However, Korea's stone is composed of granite different from foreign stone, and granite has different composition and characteristics from European stone. Therefore, research on verification and treatment technology for introduction of treatment agent for foreign stone is almost done. Not losing It is commercialized to investigate the characteristics of new adhesives applicable to domestic cultural properties, namely epoxy adhesives for the treatment of stone cultural properties, as a way to prevent the weathering and damage of the stone cultural properties, which are the largest part of Korean cultural heritage, and to preserve them. Epoxy resins were selected and reported to confirm the applicability of cultural properties (National Research Institute of Cultural Properties, 2003).

Korean Patent Application No. 2008-0054054 describes a permeable absorption inhibitor for cleaning the surface of a structure including a cultural property, preservation of the structure, and a method for treating the surface of the structure using the same, and Korean Patent Application No. 2009-0032210 No. 3 relates to the preservation treatment method of the stone cultural property using acrylic polymer, and describes the preservation treatment method of the stone cultural property by impregnating the polymer treatment agent in the stone to prevent physical and oxidative weathering and deterioration for the preservation treatment of the stone cultural property. .

However, the above-described prior arts do not describe a technique for minimizing the coefficient of thermal expansion, which is a very important element of the preservation agent of the stone cultural property. The technique of minimizing the coefficient of thermal expansion is a very important technique to prevent weathering or artificial and natural damage of national treasures. Therefore, it is necessary to develop a preservation adhesive for stone cultural properties that can minimize the coefficient of thermal expansion so that the damage and weathering of the national treasure stone cultural properties do not proceed.

An object of the present invention was devised to solve the above problems, by adding an inorganic filler having a low thermal expansion coefficient to the epoxy resin for preservation of the stone cultural property to lower the thermal expansion coefficient of the adhesive for preserving the stone cultural property to reduce the stress applied to the stone The present invention provides an epoxy adhesive composition for preserving a stone cultural property and an adhesive using the same, which can minimize and increase a preservation treatment effect.

In order to solve the above problems, the present invention includes a fused silica having a low coefficient of thermal expansion as an inorganic filler in the epoxy resin to lower the coefficient of thermal expansion lowering the stress of the stone culture material epoxy adhesive composition and adhesive for preservation to provide.

According to a preferred embodiment of the present invention, the inorganic filler may include 30-230 parts by weight of fused silica and 10-50 parts by weight of the curing agent with respect to 100 parts by weight of the epoxy resin.

According to another preferred embodiment of the present invention, the epoxy resin is a bisphenol A type epoxy resin, bisphenol F type epoxy resin, novolac type epoxy resin, flame retardant epoxy resin, cycloaliphatic epoxy resin, rubber modified epoxy resin, It may be at least one member selected from the group consisting of a polyfunctional amine epoxy resin, a glycidyl amine epoxy resin, and a hydrated bisphenol A epoxy resin.

According to another preferred embodiment of the present invention, the epoxy resin may have an equivalent weight of 100-1,000 and a viscosity of 2,000-5,000 cps.

According to another preferred embodiment of the present invention, the fused silica may have a molecular weight of 60.08, a softening point of 1,650 ° C., a specific gravity of 2.21, and a thermal expansion coefficient of 0.5 × 10 ⁻⁶ ppm (1000 ° C.).

According to another preferred embodiment of the present invention, the curing agent isophorone diamine (IPDA), polypropylene glycol bis 2-aminopropyl ether, 4,4'-diamino diphenyl methane, 3,3 ', 5,5 '-Tetramethyl-4,4'-diaminodiphenyl methane, 3,3', 5,5'-tetraethyl-4,4'-diaminodiphenylmethane, 3,3'-dimethyl-5,5 '-Dimethyl-4,4'-diaminodiphenylmethane, 3,3'-diaminobenzophenone, 3,3'-diaminodiphenylsulfone, 3,4'-diaminodiphenylsulfone, 4,4 It may be at least one selected from '-diamino diphenyl sulfone and 3,4,4'-triamine diphenyl sulfone.

According to another preferred embodiment of the present invention, the reactive diluent may further comprise 10-50 parts by weight based on 100 parts by weight of the epoxy resin.

According to another preferred embodiment of the present invention, the reactive diluent is selected from butylglycidyl ether, phenylglycidyl ether, aliphatic glycidyl ether, and modified-tertiary-carboxylic glycidyl ester. More than one species may be selected.

According to another preferred embodiment of the present invention, the stone cultural heritage preservation epoxy adhesive according to the present invention may be made of an epoxy adhesive composition for stone cultural heritage preservation.

Epoxy adhesive composition for preserving the stone culture material according to the present invention by applying the fused silica as an inorganic filler to the epoxy resin in order to lower the thermal expansion coefficient sufficiently lowers the thermal expansion coefficient, thereby minimizing the stress applied to the stone to greatly increase the storage effect, It improves the viscosity and physico-chemical properties suitable for masonry cultural properties, yellowing does not occur, there is stability of color, and has the effect of having excellent adhesion.

1 is a view showing a seasonal aspect of the conventional epoxy adhesive for preservation of stone cultural properties.
2 is a graph for calculating the stress of how a material having a large coefficient of thermal expansion affects a small material.
3 is a graph showing thermal expansion coefficients of Examples 1 to 4 and Comparative Examples 1 to 5. FIG.
4 is a graph showing thermal expansion coefficients of Examples 5 to 8 and Comparative Examples 6 to 9;
5 is a graph showing thermal expansion coefficients of Examples 9 to 12 and Comparative Examples 10 to 13;

In the present invention, in providing an epoxy adhesive composition for preserving a stone cultural property and an adhesive using the same, it was confirmed that the stress applied to the stone is minimized by lowering the coefficient of thermal expansion of the adhesive for preserving the stone cultural property by adding fused silica as an inorganic filler.

The epoxy adhesive composition for preserving the stone cultural property according to the present invention is characterized in that it contains 30-230 parts by weight of fused silica and 10-50 parts by weight of a curing agent with respect to 100 parts by weight of an epoxy resin.

The epoxy resin used in the present invention can lower the thermal expansion coefficient of the epoxy resin by applying fused silica as an additive to the epoxy resin as a main raw material of the adhesive composition used for the preservation treatment of the stone cultural properties. The fused silica (0.5 ppm / ℃) is a additive that can significantly reduce the thermal expansion coefficient of the epoxy resin because it has a very low thermal expansion coefficient compared to the conventional additives, and the viscosity improvement and physico-chemical properties that can be applied to stone cultural properties Physical properties can be improved.

Epoxy resins used as adhesives for weathered stone cultural properties exposed to the outside environment should have similar physical strength as weathered stone to avoid secondary peeling problems. In addition, it must have strong adhesion to weathered stone and must have a certain level of viscosity for field treatment. In addition to the basic adhesion function, as a treatment agent used in cultural properties, it must have morphological stability in an environment where temperature changes occur in four seasons, and minimize stress on cultural properties. The smaller the difference in coefficient of thermal expansion, the smaller the stress on the stone. Therefore, the epoxy resin used in the present invention includes a fused silica capable of controlling the expansion coefficient small.

The average coefficient of thermal expansion of the stones generally used in Korea is shown in Table 1 below.

[Table 1]

The epoxy resin used for this invention does not have a restriction | limiting in particular in the kind, For example, a bisphenol-A epoxy resin, a bisphenol F-type epoxy resin, a novolak-type epoxy resin, a flame-retardant epoxy resin, a cycloaliphatic epoxy resin, rubber deformation At least one member selected from the group consisting of an epoxy resin, a polyfunctional amine epoxy resin, a glycidyl amine epoxy resin and a hydrated bisphenol A epoxy resin, and the like, and a hydrated bisphenol A epoxy resin. It is most preferable, since it is inexpensive, excellent in physical properties, and does not have yellowing, it is preferable because it is industrial and suitable as an adhesive.

It is preferable that the equivalent weight of the epoxy resin is 100-1,000, and the viscosity is 2,000-5,000 cps. If the equivalent weight of the epoxy resin is less than 100, the hardness is too high, which may lower the flexibility, and if the equivalent exceeds 1,000, Adhesion is high, but the glass transition temperature may decrease, which is not preferable. If the viscosity of the epoxy resin is less than 2,000 cps, the viscosity is too low, and the adhesion and coating strength may be deteriorated, and if it exceeds 5,000 cps, the viscosity is too high. Not desirable

The epoxy resin used in the present invention may be represented by the following [Formula 1] to [Formula 6].

[Formula 1]

Bisphenol A type epoxy resin

(2)

Bisphenol F type epoxy resin

(3)

Flame retardant epoxy resin

[Formula 4]

Novolak-type epoxy resin

[Chemical Formula 5]

Multifunctional Amine Epoxy Resin

[Chemical Formula 6]

The fused silica used in the present invention is composed of a single SiO ₂ component, has a molecular weight of 60.08, has a white or opaque amorphous network structure, and has the smallest thermal expansion coefficient among industrial materials. Softening point: 1,650 ℃, Specific gravity: 2.21, Crystal structure: Amorphous, Thermal expansion coefficient: 0.5 × 10 ^-6 ppm (1000 ℃), Quartz Also known as quartz glass, synthetic quartz, silica, silicon dioxide, and silica glass.

The fused silica is an insulating material having an extremely low coefficient of thermal expansion, remarkably excellent heat resistance, low air permeability, low thermal conductivity, chemical stability, and excellent electrical conductivity.

The epoxy adhesive composition for preserving the stone cultural property according to the present invention preferably contains 30-230 parts by weight of fused silica as an inorganic filler with respect to 100 parts by weight of an epoxy resin, but less than 30 parts by weight does not sufficiently lower the thermal expansion coefficient of the epoxy resin. When the epoxy resin adhesive is applied to the stone cultural properties, the difference between the thermal expansion coefficient of the stone cultural properties and the epoxy resin adhesive becomes large, so that the stress applied to the stone cultural properties cannot be minimized. Therefore, the problem of the strength fall as an adhesive agent may arise.

The curing agent used in the present invention is an amine-based isophoronediamine, polypropylene glycol bis 2-aminopropylether, 4,4'-diaminodiphenyl methane, 3,3 ', 5,5'-tetramethyl-4, 4'-diaminodiphenyl methane, 3,3 ', 5,5'-tetraethyl-4,4'-diaminodiphenylmethane, 3,3'-dimethyl-5,5'-dimethyl-4,4 '-Diaminodiphenylmethane, 3,3'-diaminobenzophenone, 3,3'-diaminodiphenylsulfone, 3,4'-diaminodiphenylsulfone, 4,4'-diaminodiphenylsulfone And 3,4,4'-triaminediphenylsulfone.

In addition, the composition may further comprise 10-50 parts by weight of the reactive diluent based on 100 parts by weight of the epoxy resin for the purpose of adjusting the viscosity in the composition.

Since the reactive diluent has one or more epoxy groups, the reactive diluent participates in the reaction and enters the crosslinked structure into the cured product. The use of the reactive diluent improves flowability, defoaming property, permeability improvement, or fillers when the adhesive is used. There is an advantage that can be added effectively. The reactive diluent may be selected from one or more of butylglycidyl ether, phenylglycidyl ether, aliphatic glycidyl ether, and modified-tertiary-carboxylic glycidyl ester.

In addition to the above components, the epoxy adhesive composition of the present invention may be blended with additives used in epoxy adhesive compositions, for example, additives such as curing accelerators in a usual amount of use.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. It will be apparent to those skilled in the art, however, that these examples are provided to further illustrate the present invention, and the scope of the present invention is not limited thereto.

< Example  And Comparative Example >

ingredient

In the examples, as the epoxy resin, the hydrated bisphenol A epoxy resin was used ST-3000 manufactured by Kukdo Chemical Co., Ltd., and fused silica (FSS0025, Boramke Metal Co., Ltd.) was used, and talc was (PN-A 400). , Youngwoo Chemtech Co., Ltd. was used, and isophorone diamine (IPDA) of Kukdo Chemical was used, and PG-207 of Kukdo Chemical was used as an epoxy reactive diluent. In addition, the epoxy resin, the curing agent and the diluent used in Examples and Comparative Examples are represented by the following [Formula 7] to [Formula 9], the physical properties are shown in the following [Table 2], the physical properties of the fused silica and talc It is shown in [Table 3].

[Formula 7]

ST-3000

[Formula 8]

IPDA

[Chemical Formula 9]

PG-207

[Table 2]

1) Epoxy Equivalent Weight (EEW)

2) Active Hydrogen Equivalent Weight (AHEW)

[Table 3]

Measurement of thermal expansion coefficient

When the adhesive was actually applied to the stone, the coefficient of thermal expansion was measured to measure the stress applied to the stone due to thermal expansion as the temperature changes in four seasons. Dilatometer (DIL 801L Air) confirmed the thermal expansion behavior from room temperature to 50 ℃ according to the international standard DIN 51045 and measured the coefficient of thermal expansion. Specimens for measuring the coefficient of thermal expansion were produced using the silicone mold as follows.

Length = 6 ± 0.05 (mm) x Width b = 6 ± 0.05 (mm) x Thickness h = 8 ± 0.1 (mm)

Stress calculation

2 is a formula for calculating the stress of how a material having a higher coefficient of thermal expansion affects a smaller material when two objects are joined. The Young's modulus of the epoxy resin and the Young's modulus of the granite are 4 and 70 GPa, respectively. The thermal expansion coefficient of the resin is about 70 ppm, and granite is 10.7 ppm, and the stresses are calculated at the temperature change of 20 degrees Celsius. Epoxy resins have a stress of about 937 KPa on granite, which is expected to have a significant fatal effect on stone. Therefore, the coefficient of thermal expansion is considered to be a very important part of the physical properties of epoxy resins. If the thermal expansion coefficient of epoxy resins can be reduced to about 15 ppm by mixing with inorganic additives, it will give about 163 KPa to the granite. A stress reduction of% can be seen.

In addition, the equation for the stress calculation can be expressed as follows.

[Equation 1]

Flexural strength  Measure

In order to measure the bending strength of the epoxy resin, a three-point bending test was conducted according to the method of ISO 178. Flexural strength was measured using a Instron 5560 (ISO 9001) at a test rate of 2 mm / min. The test piece was produced as follows, using the silicone mold.

Length l = 130 ± 2.0 (mm) x Width b = 10 ± 0.2 (mm) x Thickness h = 4 ± 0.2 (mm)

The tensile strength  Measure

Adhesive overlap shear defect strength was measured by applying a tensile force parallel to the bond surface of the adhesive and the major axis of the specimen, and stressed at a rate of 2 mm / min on a single overlapping joint between the adhesive surfaces. Specimens were made of stainless panels having a width of 13 cm, a length of 2.54 cm, and a height of 0.2 cm, and were treated with sandpaper 60 to obtain optimum bonding to the adhesive surface. The adhesive was introduced with a 0.2 mm spacer to apply a thickness of 0.2 mm, and the tensile strength was measured using an Instron (Instron 4465, Instron, UK) by applying an epoxy to an area of 2.54 cm and 1.3 cm. The test results were expressed as arithmetic mean of the fracture stress, and Newton's fracture stress was divided by the total area (330 mm ² ).

Example  One

20 parts by weight of isophoronediamine (IPDA, Kukdo co. Ltd.), a room temperature curing type curing agent, was added to 100 parts by weight of the hydrated bisphenol A type epoxy resin (ST-3000, Kukdo co. mechanic stirrer) at 600 rpm for 5 minutes. Then, 50 parts by weight of fused silica (FSS0025, Boramkemetal Co., Ltd.) was added as an inorganic filler, and the resultant was stirred for 5 minutes at 600 rpm with a mechanical stirrer to prepare an adhesive.

In order to remove the bubbles of the adhesive prepared in the vacuum oven for 5 minutes to perform a defoaming operation to prepare a specimen. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Example  2

The preparation was carried out in the same manner as in Example 1, except that 100 parts by weight of fused silica (FSS0025, Boramke Metal Co., Ltd.) was added as an inorganic filler. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Example  3

Except for adding 150 parts by weight of fused silica (FSS0025, Boramke Metal Co., Ltd.) as an inorganic filler was prepared in the same manner as in Example 1. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Example  4

The preparation was carried out in the same manner as in Example 1, except that 200 parts by weight of fused silica (FSS0025, Boramke Metal Co., Ltd.) was added as an inorganic filler. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Comparative Example  One

20 parts by weight of isophoronediamine (IPDA, Kukdo co. Ltd.), a room temperature curing type curing agent, was added to 100 parts by weight of the hydrated bisphenol A type epoxy resin (ST-3000, Kukdo co. mechanic stirrer) at 600 rpm for 5 minutes. Then, to the talc (PN-A 400, (Note) Young Woo kemtaek) an inorganic filler was added to 50 parts by weight to prepare an adhesive by stirring for 5 minutes at 600 rpm with a mechanical stirrer.

In order to remove the bubbles of the adhesive prepared in the vacuum oven for 5 minutes to perform a defoaming operation to prepare a specimen. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Comparative Example  2

It was prepared in the same manner as in Comparative Example 1 except adding 100 parts by weight of talc (PN-A 400, Youngwoo Chemtech Co., Ltd.) as an inorganic filler. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Comparative Example  3

It was prepared in the same manner as in Comparative Example 1 except adding 150 parts by weight of talc (PN-A 400, Youngwoo Chemtech Co., Ltd.) as an inorganic filler. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Comparative Example  4

It was prepared in the same manner as in Comparative Example 1 except that 200 parts by weight of talc (PN-A 400, Youngwoo Chemtech Co., Ltd.) was added as an inorganic filler. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in FIG. 3 and the following [Table 4].

Comparative Example  5

Prepared in the same manner as in Comparative Example 1 except that no inorganic filler was added. Then, the coefficient of thermal expansion of the specimen was measured and the results are shown in parts ppm in FIG. 3 and Table 4 below.

[Table 4]

As shown in [Table 4], Examples 1 to 4 using molten silica as the inorganic filler had significantly higher coefficients of thermal expansion than Comparative Examples 1 to 4 using talc as the inorganic filler and Comparative Examples 5 without the addition of the inorganic filler. It can be seen that low, because of this it can be seen that the stress can be minimized when used in stone cultural properties.

Example  5 to 8

Examples 5 to 8 were prepared in the same manner as in Examples 1 to 4, except that 33 parts by weight of the reaction diluent PG-207 was added. Then, the coefficient of thermal expansion of each specimen was measured and the results are shown in units of ppm in FIG. 4 and the following [Table 5], and the flexural strength and tensile strength were measured and the results are shown in units of ppm in [Table 7]. .

Comparative Example  6 to 9

Comparative Examples 6 to 9 were prepared in the same manner as Comparative Examples 1 to 4, except that 33 parts by weight of PG-207, a reaction diluent, was added. Then, the coefficient of thermal expansion of each specimen was measured and the results are shown in units of ppm in FIG. 4 and the following [Table 5], and the flexural strength and tensile strength were measured and the results are shown in units of ppm in [Table 7]. .

[Table 5]

Example  9-12

Examples 9 to 12 were prepared in the same manner as in Examples 1 to 4, except that 20 parts by weight of the reaction diluent PG-207 was added. Then, the coefficient of thermal expansion of each specimen was measured and the results are shown in unit ppm in FIG. 5 and the following [Table 6], and the flexural strength and tensile strength were measured and the results are shown in unit ppm in [Table 7]. .

Comparative Example  10 to 13

Comparative Examples 10 to 13 were prepared in the same manner as Comparative Examples 1 to 4, except that 20 parts by weight of the reaction diluent PG-207 was added. Then, the coefficient of thermal expansion of each specimen was measured, and the results are shown in unit ppm in FIG. 5 and the following [Table 6]. .

TABLE 6

As shown in [Table 5] and [Table 6], it can be seen that the adhesive according to an embodiment of the present invention has a low thermal expansion coefficient as compared to the comparative example. However, in the above [Table 5] and [Table 6], in some examples, the numerical value was higher than that of the comparative example, but when the fused silica was added in a volume ratio of 50 and 100% with respect to epoxy, it could be higher than when the talc volume ratio was 200%. This is because the overall additive content is much higher in talc and affects the coefficient of thermal expansion as it is. In the case where the same volume ratio was added, the coefficient of thermal expansion was lower when the fused silica according to the present invention was added than the talc, but it was confirmed by experiment and will be obvious.

[Table 7]

1) The flexural strength is measured according to the ISO 178 method.

Looking at the above [Table 7], Examples 5 to 12 shows a relatively lower flexural strength than Comparative Examples 6 to 13, because of this, the epoxy adhesive according to the invention having a low coefficient of thermal expansion and flexural strength when treated to the actual stone It can be seen that the strength is similar to the weathered stone can prevent the secondary peeling phenomenon.

Therefore, it can be seen that the epoxy adhesive composition for preserving the stone cultural heritage according to the present invention has a low thermal expansion coefficient and a low bending strength, thereby minimizing stress when used in the stone cultural heritage.

Claims (8)

An epoxy adhesive composition for masonry cultural property preservation, comprising 30 to 230 parts by weight of fused silica and 10 to 50 parts by weight of a curing agent as an inorganic filler based on 100 parts by weight of an epoxy resin.
The equivalent weight of the epoxy resin is 100-1,000, the viscosity is 2,000-5,000 cps,
The fused silica has a molecular weight of 60.08, a softening point of 1,650 ℃, specific gravity is 2.21, the epoxy adhesive composition for preservation of stone culture. The method of claim 1,
The epoxy resin is bisphenol A type epoxy resin, bisphenol F type epoxy resin, novolac type epoxy resin, flame retardant epoxy resin, cycloaliphatic epoxy resin, rubber modified epoxy resin, polyfunctional amine epoxy resin, glycidylamine Epoxy adhesive composition for stone cultural property preservation, characterized in that at least one member selected from the group consisting of a type epoxy resin and a hydrated bisphenol A type epoxy resin. delete delete The method of claim 1,
The curing agent isophoronediamine, polypropylene glycol bis 2-amino propylether, 4,4'-diaminodiphenyl methane, 3,3 ', 5,5'-tetramethyl-4,4'-diaminodiphenyl Methane, 3,3 ', 5,5'-tetraethyl-4,4'-diaminodiphenylmethane, 3,3'-dimethyl-5,5'-dimethyl-4,4'-diaminodiphenylmethane , 3,3'-diaminobenzophenone, 3,3'-diaminodiphenylsulfone, 3,4'-diamino diphenylsulfone, 4,4'-diaminodiphenylsulfone and 3,4,4 ' -Epoxy adhesive composition for preservation of stone cultural properties, characterized in that at least one selected from triamine diphenyl sulfone. The method of claim 1,
An epoxy adhesive composition for preserving a stone cultural property, further comprising 10-50 parts by weight of a reactive diluent based on 100 parts by weight of an epoxy resin. The method according to claim 6,
The reactive diluent is at least one selected from butylglycidyl ether, phenylglycidyl ether, aliphatic glycidyl ether and modified tertiary-carboxyl glycidyl ester, the epoxy for stone cultural properties Adhesive composition. An epoxy adhesive for masonry cultural property preservation, comprising an epoxy adhesive composition for masonry cultural property preservation according to any one of claims 1, 2, and 5 to 7.

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