TW202246056A - Anti-corrosion structure body - Google Patents

Abstract

Provided is an anti-corrosion structure body. The anti-corrosion structure body of the present invention comprises: a petrolatum-type anti-corrosion tape layer; a bottom coating arranged on one side of the petrolatum-type anti-corrosion tape layer; and an ultraviolet ray blocking layer arranged on the side of the petrolatum-type anti-corrosion tape layer opposite the bottom coating, wherein the temperature-resistant flow-down temperature of the petrolatum-type anti-corrosion tape layer is 90 DEG C or more, and the peel strength of the petrolatum-type anti-corrosion tape layer is 600 N/m or more. The petrolatum-type anti-corrosion tape layer comprises a temperature-resistant upward material comprising organic bentonite and/or crystalline wax, and the temperature-resistant flow-down temperature of the bottom coating is 70 DEG C or more. The anti-corrosion structure body of the present invention can be used in an outdoor environment, and can also have an excellent anti-corrosion performance even when used in a high-temperature environment or a place irradiated by direct sunlight. The anti-corrosion structure body can effectively block ultraviolet rays, has a long anti-corrosion life, excellent coating performance and appearance, and also has excellent heat resistance, ultraviolet ray resistance and construction performance.

Description

anti-corrosion structure

The present invention relates to an anti-corrosion structure, in particular to an anti-corrosion structure with excellent corrosion resistance, high temperature resistance, paintability and appearance and long anti-corrosion life.

Petrolatum anti-corrosion tape is widely used as an anti-corrosion product due to its low price. At present, petrolatum anti-corrosion tape is mainly used for marine or underground buried pipelines. Although petrolatum anti-corrosion tape can achieve anti-corrosion effect for equipment placed in the ocean or buried underground, when it is used in an outdoor environment, its service life is greatly shortened. For example, when the petrolatum anti-corrosion tape is used for marine or underground buried pipelines, its service life can be more than 10 years, but when it is used in an outdoor environment, the service life is greatly shortened to about 3 years. One of the reasons for the shortened service life is that the petrolatum material is not resistant to ultraviolet rays, and the petrolatum molecular chain is broken after being exposed to light.

In addition, the heat resistance of petrolatum anti-corrosion tape is insufficient, and oil (petrolatum) is prone to precipitation and dripping in outdoor environments. The surface of the tape is sticky, the anti-corrosion effect is deteriorated, and the anti-corrosion life is shortened.

In order to solve the problems referred to above, there are reports to apply coatings or use protective tapes on the outside of the anti-corrosion tape. However, in the case of coating the outside of the anti-corrosion tape or using a protective tape, the surface coating is difficult to apply due to oil precipitation and dripping, or the oil will flow out from the weak point of the paint or the seam of the tape, resulting in Poor appearance will affect the service life of the outer wrapping layer.

Therefore, it is an important issue to be solved urgently to provide an anti-corrosion material that does not produce or drip oil in an outdoor environment, has excellent heat resistance, corrosion resistance, paintability and appearance, and can exert anti-corrosion performance for a long time.

The problem to be solved by the invention

The present invention was made to solve the above existing problems, and its object is to provide a corrosion-resistant structure that can be used in an outdoor environment, has excellent corrosion resistance, paintability, and appearance, and is corrosion-resistant. Long life, excellent heat resistance, UV resistance and workability. solutions to problems

The inventors of the present invention conducted in-depth research to achieve the above object, and found that the above object can be achieved by implementing the following technical solutions.

That is, the present invention is as follows.

[1] A corrosion-resistant structure having: Petrolatum anti-corrosion tape layer; a primer layer, said primer layer being disposed on one side of said petrolatum-based anti-corrosion tape layer; and an ultraviolet blocking layer, the above-mentioned ultraviolet blocking layer is arranged on the opposite side of the above-mentioned petrolatum anti-corrosion belt layer to the above-mentioned primer layer, The heat-resistant flow-down temperature of the above-mentioned petrolatum anti-corrosion tape layer is above 90°C, The above-mentioned petrolatum anti-corrosion tape layer has a peel strength of 600 N/m or more, The above-mentioned petrolatum anti-corrosion belt layer includes temperature-resistant lifting material A5, The above-mentioned temperature-resistant lifting material A5 includes organic bentonite and/or crystalline wax, The heat-resistant flow-down temperature of the above primer layer is above 70°C.

[2] According to the anticorrosion structure of [1], the above-mentioned petrolatum anticorrosion layer further contains base oil A1, The content of the above-mentioned heat-resistant lifting material A5 is 10 to 40 parts by mass relative to 100 parts by mass of the above-mentioned base oil A1.

[3] According to the anticorrosion structure of [1], the above-mentioned petrolatum anticorrosion layer further includes base oil A1 and inorganic filler A2, The content of the above-mentioned inorganic filler A2 is 50 to 120 parts by mass relative to 100 parts by mass of the above-mentioned base oil A1.

[4] The anticorrosion structure according to [3], wherein the inorganic filler A2 includes at least one selected from the group consisting of talc, aluminum hydroxide, and magnesium hydroxide.

[5] The anticorrosion structure according to any one of [1] to [4], wherein the petrolatum-based anticorrosion tape has flame retardant properties.

[6] The anticorrosion structure according to any one of [1] to [5], wherein the primer layer is formed of a primer composition, The above-mentioned primer composition comprises a petrolatum primer composition or an oxidative polymerization type primer composition, The above-mentioned petrolatum primer composition comprises a temperature-resistant lifting material B5, Preferably, the above-mentioned heat-resistant lifting material B5 includes organic bentonite and/or crystalline wax.

[7] The anticorrosion structure according to [6], wherein the petrolatum primer composition further includes base oil B1, The content of the above-mentioned heat-resistant lifting material B5 is 5 to 80 parts by mass relative to 100 parts by mass of the above-mentioned base oil B1.

[8] The anticorrosion structure according to any one of [1] to [7], wherein the ultraviolet transmittance of the ultraviolet blocking layer is 1% or less.

[9] The anti-corrosion structure according to any one of [1] to [8], wherein the anti-corrosion structure further includes an anti-corrosion mastic layer, and the anti-corrosion mastic layer is provided on the above-mentioned undercoat layer and the above-mentioned petrolatum-based anti-corrosion belt between layers. The effect of the invention

The anti-corrosion structure of the present invention can be used in an outdoor environment, even when it is used in a high-temperature environment or a place exposed to direct sunlight, it can also have excellent anti-corrosion performance, can effectively block ultraviolet rays, has a long anti-corrosion life, and has excellent coating performance and excellent corrosion resistance. Excellent appearance, heat resistance, UV resistance and workability are also excellent. In addition, the anti-corrosion structure of the present invention is suitable for coating and anti-corrosion of structures of any shape, and has wide application prospects in outdoor environments.

Hereinafter, the content of the present invention will be described in detail. The description of the technical features described below is based on representative embodiments and specific examples of the present invention, but the present invention is not limited to these embodiments and specific examples. Departments that need to be explained: In this specification, the numerical range represented by "numerical value A to numerical value B" refers to the range including numerical values A and B at the endpoints.

In this specification, a numerical range indicated by "above" or "below" refers to a numerical range including the number.

In this specification, the meaning expressed by "may" includes the meaning of performing certain processing and not performing certain processing.

In this specification, the use of "depending on the circumstances" or "selecting depending on the circumstances" means that certain substances, components, execution steps, application conditions and other factors are used or not used.

In this specification, the names of units used are the names of international standard units.

In this specification, if there is no special statement, "multiple (one/kind)" means that there are two/kinds or more than two kinds/kinds.

In this specification, the references to "some specific/preferred implementations", "other specific/preferred implementations", "implementation" and so on refer to the specific elements described related to the implementation ( For example, a feature, structure, property, and/or characteristic) is included in at least one embodiment described herein and may or may not be present in other embodiments. In addition, it should be understood that the above-described elements may be combined in any suitable manner in various embodiments.

＜Anti-corrosion structure＞ The anti-corrosion structure of the present invention has: Petrolatum anti-corrosion tape layer; a primer layer, said primer layer being disposed on one side of said petrolatum-based anti-corrosion tape layer; and an ultraviolet blocking layer, the above-mentioned ultraviolet blocking layer is arranged on the opposite side of the above-mentioned petrolatum anti-corrosion belt layer to the above-mentioned primer layer, The heat-resistant flow-down temperature of the above-mentioned petrolatum anti-corrosion tape layer is above 90°C, The above-mentioned petrolatum anti-corrosion tape layer has a peel strength of 600 N/m or more, The above-mentioned petrolatum anti-corrosion belt layer includes temperature-resistant lifting material A5, The above-mentioned temperature-resistant lifting material A5 includes organic bentonite and/or crystalline wax, The heat-resistant flow-down temperature of the above primer layer is above 70°C.

Fig. 1 is a cross-sectional view schematically showing the structure of an anti-corrosion structure according to one embodiment of the present invention. As shown in FIG. 1 , the anticorrosion structure 10 includes a primer layer 1, a petrolatum anticorrosion tape layer 2 provided on the primer layer 1, and an ultraviolet blocking layer 3 provided on the petrolatum anticorrosion tape layer 2. .

Fig. 2 is a cross-sectional view schematically showing the structure of an anti-corrosion structure according to another embodiment of the present invention. As shown in FIG. 2 , the anticorrosion structure 10 has an undercoat layer 1, a petrolatum anticorrosion mastic layer 4 disposed on the undercoat layer 1, a petrolatum anticorrosion belt layer 2 disposed on the anticorrosion mastic layer 4, The ultraviolet blocking layer 3 arranged on the petrolatum anti-corrosion tape layer 2 .

[Petrazine anti-corrosion tape layer] The anti-corrosion structure of this embodiment can isolate moisture and oxygen in the air by having a petrolatum anti-corrosion tape layer, and the anti-corrosion structure can exhibit excellent anti-corrosion performance.

In some preferred embodiments, the petrolatum anti-corrosion tape layer is preferably formed as follows: the base material is immersed in the anti-corrosion composition, the base material is fully impregnated with the above-mentioned anti-corrosion composition and then cooled to room temperature to obtain petrolatum Anti-corrosion belt layer.

As the base material, a nonwoven fabric is preferred, and a polyester nonwoven fabric is particularly preferred.

It is preferable that the above-mentioned nonwoven fabric is to use a thread (hereinafter also referred to as "reinforcing thread") with a tensile strength stronger than that of the sheet body in which the fibers are piled up to prevent the fibers from being scattered, which is called a net or the like. Reinforced non-woven fabric.

In addition, as the nonwoven fabric reinforced with reinforcing yarns, it is more preferable that the reinforcing yarns are sewn into the sheet so as to form a seam along the longitudinal direction, in other words, the nonwoven fabric reinforced with warp yarns is more preferable. By constituting the nonwoven fabric in this way, when the petrolatum anticorrosion tape layer is wound around a cylindrical metal member, elongation of the petrolatum anticorrosion tape layer due to the reinforcing yarn can be suppressed. As a result, the petrolatum-based anticorrosion tape layer can be wound around a metal member in a state where a large tension is applied. In addition, shrinkage of the petrolatum-based anti-corrosion tape layer can be suppressed when the winding force is relaxed, and as a result, the operability of winding is improved. As for the nonwoven fabric, it is more preferable that the reinforcing yarns are arranged side by side at regular intervals in the width direction.

Furthermore, as a nonwoven fabric reinforced with reinforcing yarns, a nonwoven fabric having a higher elongation to a constant stress in the longitudinal direction than in the width direction is preferable.

Also, as the nonwoven fabric reinforced with reinforcing yarns, a nonwoven fabric not reinforced in the width direction, in other words, a nonwoven fabric not reinforced with weft yarns is more preferable. When the petrolatum anti-corrosion tape layer is wound around a cylindrical metal member, the width of the petrolatum anti-corrosion tape layer will be narrowed, but if there is a weft, the weft will prevent the petrolatum The shrinkage in the width direction of the anti-corrosion tape layer tends to cause curling in the petrolatum anti-corrosion tape layer, but curling is less likely to occur if there is no weft. Therefore, if there is no weft, the petrolatum-based corrosion-resistant tape layer can easily follow the shape of the metal member, and gaps are less likely to occur between the petrolatum-based corrosion-resistant tape layer formed on the metal member and other layers. Therefore, from the viewpoint of improving the anti-corrosion performance, as the above-mentioned non-woven fabric, a non-woven fabric that is not reinforced with weft yarns is preferable.

In addition, the weight per unit area of the aforementioned base material is preferably 30 to 500 g/m ² , more preferably 40 to 400 g/m ² , further preferably 50 to 300 g/m ² . The weight per unit area of the base material of the petrolatum anti-corrosion tape layer of this embodiment is 30 g/m ² or more, which has the advantage of being easy to homogenize the texture. In addition, the weight per unit area of the aforementioned base material of the petrolatum anticorrosion tape of the present embodiment is 500 ^g /m or less, so that the petrolatum anticorrosion tape will not become too hard, and the petrolatum anticorrosion It has the advantage of good handling when the tape is wound in the construction site.

The amount of the anticorrosion composition impregnated in the base material of the aforementioned petrolatum anticorrosion tape layer is preferably 300 to 5000 g/m ² , more preferably 400 to 4000 g/m ² , further preferably 500 to 500 g/m 2 . 3000 g/m ² . The amount of the anti-corrosion composition impregnated in the base material of the petrolatum anti-corrosion tape layer is more than 300 g/m ² , which has the advantage of being able to improve the anti-corrosion performance. In addition, the amount of the anticorrosion composition impregnated in the base material of the aforementioned petrolatum anticorrosion tape is 5000 ^g /m or less, so that the petrolatum anticorrosion tape does not become too hard, and the petrolatum anticorrosion The anti-corrosion tape layer has the advantage of good handling when it is wound on the construction site.

In addition, "the amount of the said anticorrosion composition impregnated in the said base material" means: the amount of the anticorrosion composition impregnated in the whole base material with respect to the area of one surface of a sheet-shaped base material.

As the anti-corrosion composition, it is preferable to include at least one selected from the group consisting of free base oil (A1), inorganic filler (A2), antirust agent (A3), colorant (A4) and heat-resistant improvement material (A5).

As a base oil (A1), petrolatum is mentioned, for example.

Examples of the inorganic filler (A2) include various inorganic fillers commonly used in this art, such as talc powder, aluminum hydroxide, silica, clay, calcium carbonate, mica, magnesium hydroxide, and metal powder. Regarding such inorganic fillers, conventionally known inorganic fillers can be used by known methods.

In some preferred embodiments, the content of the above-mentioned inorganic filler (A2) is 50 to 120 parts by mass relative to 100 parts by mass of the base oil (A1). From the viewpoint of improving the strength of the corrosion-resistant structure, the content of the above-mentioned inorganic filler (A2) is preferably 60 parts by mass or more. From the viewpoint of improving the adhesion of the corrosion-resistant structure, the content of the inorganic filler (A2) is preferably at most 110 parts by mass, more preferably at most 100 parts by mass.

As a rust preventive agent (A3), an inorganic system rust preventive agent and an organic system rust preventive agent are mentioned, for example. These antirust agents can be used alone or in combination of two or more.

As an inorganic rust preventive agent, a chromate, a nitrite, a silicate, a polyphosphate, etc. are mentioned, for example.

Examples of organic rust inhibitors include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, etc.), carboxylic acid metal soaps (lanolin Ca, naphthenic acid Zn, oxidized wax Ca, Oxidized wax Ba, etc.), sulfonates (Na sulfonate, Ca sulfonate, Ba sulfonate, etc.), amine salts, esters (esters obtained by reacting higher fatty acids with glycerin), sorbitan monoisostearate esters, sorbitan monooleate, etc.), etc.

As said tannic acid, gallnut-derived tannic acid is preferable.

In some preferred embodiments, the content of the rust inhibitor (A3) is 0.5 to 10 parts by mass, preferably 0.5 to 5 parts by mass, relative to 100 parts by mass of the base oil (A1). When the content of the antirust agent falls within the above range, the anticorrosion performance of the anticorrosion structure can be further improved.

As a coloring agent (A4), black lead, titanium dioxide, zinc oxide, graphite, carbon black, iron oxide etc. are mentioned, for example. Among these, iron oxide is preferable. These colorants may be used alone or in combination of two or more.

In some preferred embodiments, the content of the colorant (A4) is 0.5 to 5 parts by mass, preferably 0.5 to 2 parts by mass relative to 100 parts by mass of the base oil (A1).

As a heat-resistant improvement material (A5), organic bentonite, crystal wax, etc. are mentioned, for example. These temperature-resistant lifting materials can be used alone or in combination of two or more.

Organobentonite is an inorganic mineral/organic ammonium compound, which can be produced, for example, by using bentonite as a raw material, utilizing the lamellar structure of montmorillonite in bentonite and its ability to swell and disperse into colloids in water or organic solvents High-grade clay characteristics, made by inserting organic covering agent by ion exchange technology.

As organic bentonite, a commercial item can be used. As a commercial item of organobentonite, Zhejiang Huate BP-186C etc. are mentioned, for example.

In the present invention, by including the organic bentonite, the organic bentonite absorbs oil and swells in the base oil to form a gel, thereby having the ability to capture or hold oil, thereby increasing the drop point of the oil, thereby improving the antiseptic performance.

The crystalline wax refers to a wax whose crystallization peak appears during constant temperature rise at 10° C./min using a differential scanning calorimeter (DSC). The crystalline wax is not limited to a single type of crystalline wax, but also includes multiple waxes used in combination, as long as the whole shows crystallinity.

In some preferred embodiments, the crystalline wax may include fatty acid amide waxes and hydrocarbon waxes (hydrocarbon waxes). These may be used individually by 1 type, or may use it in combination of 2 or more types. Among these, fatty acid amide waxes are preferable from the viewpoint of effectively increasing the dropping point of oil, and fatty acid amide waxes having a melting point of 120 to 160° C. are more preferable.

Examples of hydrocarbon waxes (hydrocarbon waxes) include paraffin waxes, microcrystalline waxes, Fischer-Tropsch waxes, polyethylene waxes, oxidized polyethylene waxes, polypropylene waxes, and oxidized polypropylene waxes. As a commercial item of a hydrocarbon type wax, the polypropylene wax (PPW-0921) etc. by Nanjing Tianshi Co., Ltd. are mentioned, for example.

As a fatty acid amide wax, it may be a reaction product between a fatty acid and an amine. From the viewpoint of effectively increasing the dropping point of oil, it is preferable to use fatty acid amide-based waxes having 17 to 50 carbon atoms.

Examples of fatty acid amide-based waxes include, for example, methylene bislauric acid amide, methylene bis palmitic acid amide, methylene bis myristyl amide, and methylene bis stearic acid amide. Amide, Methylenebisbehenylamide, Ethylbislaurateamide, Ethylbispalmitamide, Ethylbismyristamide, Ethylbisstearamide Or extended ethyl bisbehenamide.

Fatty acid amide waxes can be synthesized by conventionally known methods, or can be purchased as commercial products.

In the present invention, by including crystalline wax, when heated to above the melting point and slowly cooled, microcrystals can be formed in the base oil, and a stable three-dimensional network structure can be formed, so that the ability to hold oil can be achieved. This can increase the drop point of oil, thereby improving the anti-corrosion performance.

In some preferred embodiments, from the viewpoint of increasing the temperature-resistant flow-down temperature, the melting point of the crystalline wax is preferably above 120°C, more preferably above 130°C. From the viewpoint of ease of processing, the melting point of the crystalline wax is preferably at most 160°C, more preferably at most 150°C.

In some preferred embodiments, with respect to 100 parts by mass of the base oil (A1), the content of the heat-resistant enhancing material (A5) is 10 to 40 parts by mass, preferably 12 to 35 parts by mass. When the content of the heat-resistant lifting material falls within the above-mentioned range, the dropping point of the oil can be increased, and the dripping of the oil can be effectively improved, thereby having excellent anti-corrosion performance. In addition, when the content of the heat-resistant enhancing material is within the above-mentioned range, excellent adhesiveness can also be obtained, and it can be adhered to the surface of the covering body effectively.

When the content of the heat-resistant enhancer is less than 10 parts by mass, it is easy to cause insufficient heat resistance, and it is difficult to balance excellent heat resistance and adhesiveness. When the content of the heat-resistant lifting material is greater than 40 parts by mass, it will easily lead to deterioration of workability and adhesiveness, which is not conducive to industrial construction.

In some preferred embodiments, when organic bentonite is used alone, the amount of organic bentonite added is preferably 10 parts by mass or more relative to 100 parts by mass of base oil from the viewpoint of improving temperature resistance. From the standpoint of ease of winding during construction, the amount of organic bentonite added is preferably at most 25 parts by mass, more preferably at most 15 parts by mass.

In some preferred embodiments, in the case of using crystalline wax alone, from the viewpoint of improving temperature resistance, the amount of crystalline wax added is preferably 10 parts by mass or more relative to 100 parts by mass of base oil, more preferably It is 15 mass parts or more, More preferably, it is 20 mass parts or more. From the viewpoint of ease of winding during construction, the amount of crystalline wax added is preferably not more than 40 parts by mass, more preferably not more than 35 parts by mass, further preferably not more than 30 parts by mass.

In some preferred embodiments, in the case of using organic bentonite and crystalline wax at the same time, from the viewpoint of improving heat resistance and workability, the addition amount of organic bentonite is preferably 5 to 100 parts by mass of base oil. 20 parts, more preferably 5 to 15 parts, the addition of crystalline wax is preferably 5 to 20 parts.

In addition to the above-mentioned components, the anticorrosion composition may contain various additives commonly used in the field of anticorrosion, such as surfactants, antioxidants, and antiaging agents, as needed, within the range that does not impair the effects of the present invention. Regarding such various additives, conventionally known additives can be used by known methods.

In some preferred embodiments, the temperature-resistant flow-down temperature of the petrolatum anti-corrosion tape layer is above 90°C. From the standpoint of suppressing oil dripping better, the temperature-resistant flow-down temperature of the petrolatum anti-corrosion coating is preferably 100 to 160°C, more preferably 110 to 150°C, further preferably 120 to 140°C. If the heat-resistant flow-down temperature of the petrolatum anti-corrosion tape layer is lower than 90°C, the heat resistance will be poor, and the problem of oil separation and dripping will easily occur, resulting in deterioration of anti-corrosion performance. The heat-resistant flow-down temperature of the petrolatum anticorrosion tape layer was measured by the method described in the examples of this specification.

In some preferred embodiments, the peel strength of the petrolatum anti-corrosion tape layer is 600 N/m or more. From the viewpoint of improving the adhesion, the peel strength of the petrolatum-based anti-corrosion tape layer is preferably 800 N/m or more. From the viewpoint of ease of winding during construction, the peel strength of the petrolatum anti-corrosion tape layer is preferably 2000 N/m or less, more preferably 1800 N/m or less, further preferably 1600 N/m or less. In some preferred embodiments, the peel strength of the petrolatum anti-corrosion tape layer is preferably 800 to 1600 N/m.

If the peel strength of the petrolatum anti-corrosion tape layer is less than 600 N/m, the adhesion will be poor, and the anti-corrosion structure will be easily detached from the adherend, making construction difficult. If the peel strength of the petrolatum anti-corrosion tape layer is greater than 2000N/m, it is easy to increase the difficulty of construction winding, which is not conducive to construction. The peel strength of petrolatum anti-corrosion tape layer was determined in Appendix H of GB/T32119-2015.

In some preferred embodiments, the thickness of the petrolatum anti-corrosion tape layer is preferably 0.5 to 4 mm, more preferably 0.9 to 2.5 mm. By making the thickness of the petrolatum anti-corrosion tape layer within the above range, there is an advantage that the anti-corrosion and anti-corrosion performance can be improved, and it also has the advantage of suppressing the floating of the petrolatum anti-corrosion tape layer during winding.

[undercoating] The primer layer 1 is formed on the side closer to the coated body (such as a metal member) than the aforementioned petrolatum-based anti-corrosion tape layer 2, and is in contact with the surface of the covered body (such as a metal member). The anti-corrosion structure has the advantages of being easily bonded to the covering (such as a metal member) and having excellent anti-corrosion performance by having a primer layer. Even if it is used in an outdoor environment, it can also have excellent anti-corrosion performance.

In the present invention, the temperature-resistant flow-down temperature of the undercoat layer is 70° C. or higher. When the base coat is a petrolatum base coat, from the standpoint of the effect of suppressing oil dripping under high temperature environment, the heat-resistant flow-off temperature of the base coat is preferably above 80°C. From the standpoint of ease of processing, the temperature-resistant flow-down temperature of the undercoat layer is preferably 110°C or lower, more preferably 90°C or lower. If the heat-resistant flow-down temperature of the primer layer is lower than 70°C, the heat resistance will be poor, and the problem of oil separation and dripping will easily occur, resulting in deterioration of anti-corrosion performance. The heat-resistant flow-down temperature of the undercoat layer was measured by the method described in the examples of this specification.

In some preferred embodiments, the primer layer can be formed by coating the primer composition on the surface of the covered body (such as a metal member). That is, the primer layer may be formed from a primer composition.

As the primer composition, any appropriate primer composition can be used to form the primer layer as long as it has the above-mentioned temperature-resistant flow-down temperature.

In some preferred embodiments, the primer composition comprises a petrolatum-based primer composition or an oxidatively polymerized primer composition.

(petrolatum based primer composition) In some preferred embodiments, the petrolatum primer composition preferably includes a base oil (B1), an anti-rust agent (B2), a reinforcing filler material (B3), a softener (B4) and a temperature-resistant improvement At least one of the group consisting of materials (B5). Preferably, the petrolatum base coating composition includes a temperature-resistant lifting material (B5).

As a base oil (B1), petrolatum, oxidized petrolatum, petrolatum, etc. are mentioned, for example. These base oils may be used alone or in combination of two or more.

As a rust preventive agent (B2), an inorganic system rust preventive agent and an organic system rust preventive agent are mentioned. These antirust agents can be used alone or in combination of two or more.

As an inorganic rust preventive agent, a chromate, a nitrite, a silicate, a phosphate, a polyphosphate, etc. are mentioned, for example.

Examples of organic rust inhibitors include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, etc.), carboxylic acid metal soaps (lanolin Ca, naphthenic acid Zn, oxidized wax Ca, Oxidized wax Ba, etc.), sulfonates (Na sulfonate, Ca sulfonate, Ba sulfonate, etc.), amine salts, esters (esters obtained by reacting higher fatty acids with glycerin), sorbitan monoisostearate esters, sorbitan monooleate, etc.), etc.

As said tannic acid, gallnut-derived tannic acid is preferable.

In some preferred embodiments, with respect to 100 parts by mass of the base oil (B1), the content of the rust inhibitor (B2) is preferably 5 to 40 parts by mass, more preferably 5 to 20 parts by mass. When the content of the antirust agent falls within the above range, the anticorrosion performance of the anticorrosion structure can be further improved.

Examples of the reinforcing filler (B3) include talc powder or talc particles, mineral mica, silica, clay, calcium carbonate, micaceous iron oxide, aluminum hydroxide, magnesium hydroxide, and the like. These reinforcing fillers may be used alone or in combination of two or more.

Among the above-mentioned reinforcing fillers, talc powder or talc particles, mineral mica are excellent in the effect of reinforcing the primer composition, and are more effective in imparting shape retention to the primer composition, so are more preferable.

In some preferred embodiments, talc powder or talc particles, and mineral mica are preferably contained in a proportion of more than 90% by mass, preferably more than 95% by mass, and more preferably 100% by mass in the reinforcing filler material. in the primer composition.

From the viewpoint of excellent workability, the median diameter of the talc particles obtained by a laser diffraction particle size distribution measuring device is preferably 1 μm or more and 100 μm or less, more preferably 1 μm or more and 50 μm or less, More preferably, it is 10 μm or more and 40 μm or less.

As the talc particles, when sieving with a 75 μm sieve, 99% by mass or more pass through the sieve (residue of 1% by mass or less) is suitable.

In some preferred embodiments, the content of the reinforcing filler (B3) is preferably 30 to 80 parts by mass, more preferably 40 to 70 parts by mass, relative to 100 parts by mass of the base oil (B1). When the content of the reinforcing filler falls within the above range, the strength of the anti-corrosion structure can be further improved.

Examples of the softener (B4) include organic compounds having a molecular weight lower than that of the aforementioned base oil, for example, mineral oil (paraffin oil), petrolatum (white petrolatum, etc.), and the like.

In some preferred embodiments, the content of the softener (B4) is preferably 20 to 80 parts by mass, more preferably 20 to 60 parts by mass, relative to 100 parts by mass of the base oil (B1). When the content of the softener falls within the above range, the corrosion resistance of the anticorrosion structure can be further improved, and the workability of the undercoat layer formed from the undercoat composition is also excellent.

As a heat-resistant improvement material (B5), organic bentonite, crystal wax, etc. are mentioned, for example. These temperature-resistant lifting materials can be used alone or in combination of two or more.

Organobentonite is an inorganic mineral/organic ammonium compound, which can be produced, for example, by using bentonite as a raw material, utilizing the lamellar structure of montmorillonite in bentonite and its ability to swell and disperse into colloids in water or organic solvents High-grade clay characteristics, made by inserting organic covering agent by ion exchange technology.

As organic bentonite, a commercial item can be used. As a commercial item of organobentonite, Zhejiang Huate BP-186C etc. are mentioned, for example.

In the primer composition of the present invention, by including organic bentonite, the organic bentonite absorbs oil and swells in the base oil to form a gel, thereby having the ability to capture or hold oil, thereby increasing the drop point of the oil, thereby improving anti-corrosion performance.

The crystalline wax refers to a wax whose crystallization peak appears during constant temperature rise at 10° C./min using a differential scanning calorimeter (DSC). The crystalline wax is not limited to a single type of crystalline wax, but also includes multiple waxes used in combination, as long as the whole shows crystallinity.

In some preferred embodiments, the crystalline wax may include fatty acid amide waxes and hydrocarbon waxes (hydrocarbon waxes). These may be used individually by 1 type, or may use it in combination of 2 or more types. Among these, fatty acid amide waxes are preferable from the viewpoint of effectively increasing the dropping point of oil, and fatty acid amide waxes having a melting point of 120 to 160° C. are more preferable.

Examples of hydrocarbon waxes (hydrocarbon waxes) include paraffin waxes, microcrystalline waxes, Fischer-Tropsch waxes, polyethylene waxes, oxidized polyethylene waxes, polypropylene waxes, and oxidized polypropylene waxes. As a commercial item of a hydrocarbon type wax, the polypropylene wax (PPW-0921) etc. by Nanjing Tianshi Co., Ltd. are mentioned, for example.

As a fatty acid amide wax, it may be a reaction product between a fatty acid and an amine. From the viewpoint of effectively increasing the dropping point of oil, it is preferable to use fatty acid amide-based waxes having 17 to 50 carbon atoms.

Examples of fatty acid amide-based waxes include, for example, methylene bislauric acid amide, methylene bis palmitic acid amide, methylene bis myristyl amide, and methylene bis stearic acid amide. Amide, Methylenebisbehenylamide, Ethylbislaurateamide, Ethylbispalmitamide, Ethylbismyristamide, Ethylbisstearamide Or extended ethyl bisbehenamide.

Fatty acid amide waxes can be synthesized by conventionally known methods, or can be purchased as commercial products.

In the primer composition of the present invention, by including crystalline wax, when heated to above the melting point and slowly cooled, microcrystals can be formed in the base oil, and a stable three-dimensional network structure can be formed, which can play a supporting role. The ability of the oil to increase the drop point of the oil, thereby improving the anti-corrosion performance.

In some preferred embodiments, from the viewpoint of increasing the temperature-resistant flow-down temperature, the melting point of the crystalline wax is preferably above 120°C, more preferably above 130°C. From the viewpoint of ease of processing, the melting point of the crystalline wax is preferably at most 160°C, more preferably at most 150°C.

In some preferred embodiments, with respect to 100 parts by mass of the base oil (B1), the content of the heat-resistant lifting material (B5) is preferably 5 to 40 parts by mass, more preferably 10 to 36 parts by mass. When the content of the heat-resistant lifting material falls within the above range, the dropping point of the oil can be increased, and the dripping of the oil can be effectively improved, thereby having excellent anti-corrosion performance. In addition, when the content of the heat-resistant enhancing material is within the above-mentioned range, excellent adhesiveness can be obtained, and it can be effectively adhered to surfaces such as covered bodies (such as metal members).

When the content of the heat-resistant enhancer is less than 5 parts by mass, the heat resistance is likely to be insufficient, and it is difficult to achieve both excellent heat resistance and adhesiveness. When the content of the heat-resistant lifting material is greater than 40 parts by mass, it will easily lead to deterioration of workability and adhesiveness, which is not conducive to industrial construction.

In addition to the above-mentioned components, the above-mentioned petrolatum-based primer composition may contain a viscosity modifier, a coupling agent, a surfactant, an antioxidant, an anti-aging agent, an anti-fungal agent, Various additives commonly used in anti-corrosion fields such as insect repellents, rodent repellants, and antibacterial agents. Regarding such various additives, conventionally known additives can be used by known methods.

(oxidative polymerization type primer composition) As the oxidation polymerizable primer composition, commercially available products such as Nitto Denko Co., Ltd. oxidation polymerizable primer XG-PN can be used.

[ultraviolet blocking layer (UV blocking layer)] The anticorrosion structure of the present embodiment has a UV blocking layer on the air interface side of the petrolatum anticorrosion tape layer, thereby being able to block the irradiation of ultraviolet rays and suppressing damage to the anticorrosion structure. As a result, even if the anticorrosion structure is It can also have excellent anti-corrosion performance and anti-corrosion life when used in outdoor environments.

In some preferred embodiments, the UV blocking layer may be a protective paint layer or a protective tape.

As the protective paint layer, for example, a protective paint layer formed of acrylic paint, urethane paint, epoxy resin paint or the like can be used. The method for forming the protective coating layer is not particularly limited, and it can be formed by a conventionally known method, for example, by applying an acrylic paint or the like to the surface of a release liner with release properties and drying it, and then peeling off the release liner. to form.

A commercial item can be used as said acrylic paint, For example, XG-T by Nitto Denko Co., Ltd. is mentioned. A commercial item can be used as a polyurethane paint, For example, the house guard polyurethane waterproof paint by Shanghai Hanlong Industrial Co., Ltd. is mentioned.

The above-mentioned paint is dried and cured after being coated on the surface of the aforementioned petrolatum anti-corrosion tape layer to form the main body of the coating.

In some preferred embodiments, the UV blocking layer is preferably a protective tape. As the protective tape, it is preferably formed of a protective layer and an optional adhesive layer.

Examples of the material forming the protective layer include polyvinyl chloride, polyethylene, polypropylene, butyl rubber, asphalt, aluminum film, polyester, polyurethane, and synthetic rubber. From the viewpoint of workability, polyvinyl chloride and polyethylene are preferable.

The protective layer may be provided with an adhesive layer on the surface. As an adhesive which forms this adhesive layer, a rubber type adhesive, an acrylic type adhesive, etc. are mentioned, for example.

In some preferred embodiments, since the UV blocking layer constitutes the outermost surface of the anti-corrosion structure, the protective tape preferably further contains a UV absorber.

In some preferred embodiments, the ultraviolet transmittance (UV transmittance) of the aforementioned UV blocking layer is preferably less than 1%, more preferably less than 0.5%. The anti-corrosion structure of the present embodiment can block the irradiation of ultraviolet rays by making the UV transmittance of the UV blocking layer 1% or less, and suppress the deterioration of the anti-corrosion structure by ultraviolet rays, thereby further suppressing the deterioration of the coating (such as made of metal). components) corrosion.

It should be noted that the UV (ultraviolet rays) in the aforementioned UV transmittance refers to a wavelength of 300 nm.

In some preferred embodiments, the thickness of the UV blocking layer is preferably 0.1 to 3 mm, more preferably 0.1 to 1.5 mm. By setting the thickness of the UV blocking layer within the above range, the corrosion-resistant structure can be protected from damage by external force, and workability and corrosion resistance can be improved.

In some preferred embodiments, the UV blocking layer may be one layer, or two or more layers.

[Anti-corrosion clay layer] The anti-corrosion cement layer is filled in irregularly shaped concave-convex parts on the surface of the primer coating to obtain a smooth surface, which is convenient for sticking and wrapping the petrolatum anti-corrosion tape layer. The present invention has no special limitation on the filling amount of the above-mentioned anti-corrosion mortar, and those skilled in the art can adjust and select it according to the actual use environment, product requirements or anti-corrosion requirements. In order to improve the effect of comprehensive protection, the filling method of the above-mentioned anti-corrosion mortar is preferably to fill irregularly shaped concave-convex parts into a smooth transition with a slope or a smooth slope.

There is no particular limitation on the specific process of filling the above-mentioned anti-corrosion cement, and the known process of filling such anti-corrosion materials well known by those skilled in the art will suffice. From the perspective of improving the effect of comprehensive protection, the specific process of filling the above-mentioned anti-corrosion mortar is better: fill the irregular-shaped parts with anti-corrosion mortar, and fill the irregular-shaped structures and vertical corners with anti-corrosion mortar with anti-corrosion mortar. The smooth transition facilitates the subsequent pasting of the petrolatum anti-corrosion tape layer and prevents the accumulation of rainwater.

As the anticorrosion mastic for filling, a commercially available item can be used, for example, XG-M manufactured by Nitto Denko Co., Ltd. is exemplified.

＜Use＞ The anti-corrosion structure disclosed here can be widely used in various comprehensive environments, for example, it can be used outdoors, exposed to high temperature environment for a long time, and places exposed to direct sunlight.

Example Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. Evaluation methods in Examples are as follows. In addition, in an Example, unless otherwise indicated, "part" is a basis of weight. All components used in the examples are commercially available.

＜Evaluation test＞ (The heat-resistant flow-down temperature of the primer layer) Measured according to Appendix A of GB/T32119-2015.

Specifically, adjust the constant temperature drying oven to keep it at a set temperature (40° C.). Select 3 Q235 steel plates of 80 mm × 60 mm × (3 to 5) mm, grind them with 240# sandpaper in the direction of the extended side, clean the steel pipe with gauze dipped in acetone or ethanol, remove surface debris, and dry the surface. On the 80mm×60mm surface of each experimental steel plate, draw a black line at 18mm and 15mm from the lower end. A 100 to 150 μm thick primer coating sample film was coated on one of the scribed sides of the experimental steel plate.

Put the above device as a whole into a constant temperature drying oven with adjusted temperature and keep it vertical. After 24 hours, observe whether the sample film flows to the reference line. The sample films of the three experimental steel plates are judged to be qualified if there is no flow phenomenon or no flow to the reference line. Otherwise, it is judged to be unqualified. If it is qualified, the temperature is gradually increased at intervals of 10°C to repeat the above experiment until the sample film is observed to flow, and the temperature point before the flow of the sample film is recorded as the temperature-resistant flow-down temperature.

(The heat-resistant flow-down temperature of the petrolatum anti-corrosion tape layer) Measured according to GB/T30651.

Specifically, a sample of 500 mm×50 mm was cut out from the petrolatum anti-corrosion tape layer of each example and each comparative example. Adjust the constant temperature drying oven to keep it at the set temperature. Use gauze dipped in acetone or ethanol to clean the steel pipe, remove surface debris, and dry the surface. Wrap the sample twice in the middle of the steel pipe, remove excess sample, and smooth the surface. Place the steel pipe wrapped with the sample on the support, and place the tray below it. Put the above-mentioned device as a whole in a constant temperature drying oven with adjusted temperature, keep it horizontal, and observe whether there is any compound dripping in the tray after 24 hours. If there is no dripping, gradually increase the temperature at intervals of 10°C and repeat the above experiment until the compound is observed. Dropping, the temperature point before the dropping temperature of the compound is recorded as the temperature-resistant flow-down temperature.

(peel strength of petrolatum anti-corrosion tape layer) The peel strength is measured according to Appendix H of GB/T32119-2015.

Specifically, put the petrolatum anti-corrosion tapes of each example and each comparative example under the test environment condition of (23±2)°C for 24 hours, and cut out 150 mm×25 mm as a sample. Paste the above-mentioned petrolatum anti-corrosion tape layer sample on one end of the test steel plate (304 stainless steel), and the contact surface is about 50 mm×25 mm. Put a polyester film with a thickness of 25 μm and a size of 150 mm × 50 mm on the above sample, and roll it back and forth once with a rolling device weighing about 2 kg, so that the above sample is tightly adhered to the steel plate. After standing for 30 minutes, clamp the sample with the polyester film on the upper fixture of the tensile testing machine, and clamp the test steel plate on the lower fixture. Stretch at a speed of min, read the force (maximum value) when the sample just begins to separate from the steel plate, and record it as the peel strength.

(UV transmittance) Measured according to GBT17032-1997.

(Heat resistance (thermal cycle test)) A steel pipe with a diameter of 50 mm and a length of 300 mm is used, and a primer layer (300 g/m ² ) is installed in sequence, and a petrolatum anti-corrosion tape layer is wound. The petrolatum anti-corrosion tape layer is 350 mm. mm (length) × 50 mm (width) is overlapped and wound on the steel pipe, and then a UV blocking layer is set on the petrolatum anti-corrosion tape layer.

After the UV blocking layer is dried, it is put into an oven, and the setting conditions are: -20°C (4h) to 80°C (8h) for thermal cycle experiments.

When there was no oil dripping for 360 hours or more, it was judged as "◯", and when there was oil dripping, it was judged as "×".

(Durability (UV resistance performance)) Measured according to GBT 1865-2009.

Specifically, a 100 mm (length)×70 mm (width) wide steel plate was used. Use 240# sandpaper to grind in the direction of the extended side, clean the steel pipe with gauze dipped in acetone or ethanol, remove surface debris, and dry the surface.

Set the primer layer (300 g/m ² ) in sequence, wrap the petrolatum anti-corrosion tape layer, the petrolatum anti-corrosion tape layer is 150 mm (length) × 100 mm (width) single layer wrapped on the upper side of the steel pipe, Next, a UV blocking layer is set on the petrolatum anti-corrosion tape layer to form an anti-corrosion structure.

Put the anti-corrosion structure sample prepared above into a xenon lamp aging tester, setting conditions: air temperature 38°C, BPT: 63°C, irradiation 180 W/m ² , spray water for 18 minutes/2h.

After 2000 hours, the anti-corrosion structure was peeled off, and the steel plate was visually observed for corrosion. No corrosion was judged as "◯", and corrosion was judged as "×".

(Durability (thermal cycle 1000h+salt spray test 2000h)) Use a 100 mm (length) × 70 mm (width) steel plate. Use 240# sandpaper to grind in the direction of the extended side, clean the steel pipe with gauze dipped in acetone or ethanol, remove surface debris, and dry the surface.

Set the primer layer (300 g/m ² ) in sequence, wrap the petrolatum anti-corrosion tape layer, the petrolatum anti-corrosion tape layer is 150 mm (length) × 100 mm (width) wrapped in a single layer on the upper side of the steel pipe, Next, a UV blocking layer is set on the petrolatum anti-corrosion tape layer to form an anti-corrosion structure.

Put the above-prepared anti-corrosion structure sample into an oven, set the conditions: -20°C (4h) to 80°C (8h) for a thermal cycle test of 1000h.

The heat-treated samples were placed in a salt spray test chamber for corrosion test for 2000h. The conditions of the corrosion test are: Salt spray 35°C (5% salt water) 2hr Dry at 60℃/25%RH4hr Humidification 50℃/98%RH2hr After the 2000h salt spray corrosion test, the samples were peeled off, and the steel plate was visually observed for corrosion. No corrosion was judged as "◯", and corrosion was judged as "×".

Preparation example 1: Add 100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid, 40 parts by mass of talc, 11 parts by mass of amide wax (melting point: 140 to 146°C) and 16 parts by mass of organic bentonite to the reaction container, and heated to 150 ° C, stirring to mix well. Then, it was naturally cooled to room temperature, and a petrolatum base coating material 1 was obtained.

Preparation example 2: Add 100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid, 40 parts by mass of talc powder, and 11 parts by mass of amide wax (melting point: 140 to 146° C.) into the reaction vessel one by one, and heat to 150°C, stir and mix evenly. Then, it was naturally cooled to room temperature, and a petrolatum base coating material 2 was obtained.

Preparation example 3: 100 parts by mass of petrolatum, 30 parts by mass of liquid paraffin, 8 parts by mass of tannic acid and 40 parts by mass of talc powder were added to the reaction container one by one, heated to 150° C., and stirred and mixed uniformly. Then, it was naturally cooled to room temperature, and a petrolatum base coating material 3 was obtained.

Preparation example 4: Oxidative polymerization type primer material 4: NITOHULLMAC XG-PN manufactured by Nitto Denko Co., Ltd.

Preparation example 5: Add 100 parts by mass of petrolatum, 1 part by mass of tannic acid, 30 parts by mass of talc, 60 parts by mass of aluminum hydroxide, and 26 parts by mass of amide wax (melting point: 140 to 146° C.) into the reaction vessel one by one, and heat To 150°C, stir and mix well.

The polyester non-woven fabric is dipped into the mixture prepared above, the polyester non-woven fabric is fully impregnated with the mixture, and then cooled to room temperature to prepare the petrolatum anti-corrosion tape layer 1 . The thickness of the petrolatum anti-corrosion tape layer 1 is 1.1 mm. The temperature-resistant flow-down temperature of the petrolatum anti-corrosion tape layer 1 is 120°C.

Preparation example 6: Add 100 parts by mass of petrolatum, 1 part by mass of tannic acid, 30 parts by mass of talc, 60 parts by mass of aluminum hydroxide, 7 parts by mass of amide wax (melting point: 140 to 146° C.) and 5 parts by mass of organobentonite to the In the reaction vessel, and heated to 150 ° C, stirred and mixed evenly.

The polyester non-woven fabric is dipped into the mixture prepared above, the polyester non-woven fabric is fully impregnated with the mixture, and then cooled to room temperature to prepare the petrolatum anti-corrosion tape layer 2 . The thickness of the petrolatum anti-corrosion tape layer 2 is 1.1mm. The temperature-resistant flow-down temperature of the petrolatum anti-corrosion tape layer 2 is 100°C.

Preparation Example 7: Add 100 parts by mass of petrolatum, 1 part by mass of 1.1 parts by mass of tannic acid, 65 parts by mass of talc powder, and 3 parts by mass of amide wax (melting point: 140 to 146°C) into the reaction vessel one by one, and heat to 150°C, stirring and mixing uniform.

The polyester non-woven fabric is dipped into the mixture prepared above, the polyester non-woven fabric is fully impregnated with the mixture, and then cooled to room temperature to prepare the petrolatum anti-corrosion tape layer 3 . The thickness of the petrolatum anti-corrosion tape layer 3 is 1.1 mm. The temperature-resistant flow-down temperature of the petrolatum anti-corrosion tape layer 3 is 60°C.

Preparation example 8: Oxidative polymerization paint: NITOHULLMAC XG-T manufactured by Nitto Denko Co., Ltd.

Preparation example 9: PU coating: House guard polyurethane waterproof coating manufactured by Shanghai Hanlong Industrial Co., Ltd.

Example 1 The covering body protected by the anti-corrosion structure uses Q235 steel pipe or steel plate.

The formation of the undercoat layer of the corrosion-resistant structure used the petrolatum-based undercoat material 1 prepared in Preparation Example 1 above.

The above-mentioned petrolatum base coating material 1 is coated on the surface of steel pipe or steel plate with a coating amount of 300 g/m ² to form a base coat.

Next, the petrolatum anti-corrosion tape layer 1 prepared in the above Preparation Example 5 was wound in a half-wrapped manner on the above primer layer.

Next, 2 layers of the oxidative polymerization paint of Preparation Example 8 were painted on the above-mentioned petrolatum anti-corrosion tape layer 1 to form on the above-mentioned petrolatum anti-corrosion tape layer 1 as a UV blocking layer. Thus, a corrosion-resistant structure was obtained.

Examples 2 to 5 A corrosion-resistant structure was obtained in the same manner as in Example 1 except that the undercoat layer, the petrolatum-based corrosion-resistant tape layer, and the UV blocking layer were changed as shown in Table 1. The evaluation results are shown in Table 1.

Comparative Examples 1 to 5 Except that the undercoat layer, the petrolatum-based anticorrosion tape layer, and the UV blocking layer were changed as shown in Table 1, an anticorrosion structure was obtained in the same manner as in Example 1. The evaluation results are shown in Table 1. Table 1 Primer Petrolatum anti-corrosion tape layer UV blocking layer Heat resistance (thermal cycle test) Durability (UV resistant performance) Durability (thermal cycle 1000h + salt spray test 2000h) constitute Heat-resistant flow temperature (°C) constitute Heat-resistant flow temperature (°C) Peel strength (N/m) constitute UV transmittance (%) Example 1 Petrolatum primer 1 90 Petrolatum anti-corrosion tape layer 1 120 1060 Oxygenated Coatings <1 〇 〇 〇 Example 2 Petrolatum primer 1 90 Petrolatum anti-corrosion tape layer 1 120 1060 PU coating <1 〇 〇 〇 Example 3 Oxidation polymerizable primer 4 >90 Petrolatum anti-corrosion tape layer 1 120 1060 Oxygenated Coatings <1 〇 〇 〇 Example 4 Petrolatum primer 2 70 Petrolatum anti-corrosion tape layer 1 120 1060 Oxygenated Coatings <1 〇 〇 〇 Example 5 Petrolatum primer 1 90 Petrolatum anti-corrosion tape layer 2 100 1410 Oxygenated Coatings <1 〇 〇 〇 Comparative example 1 Petrolatum primer 3 50 Petrolatum anti-corrosion tape layer 3 60 1617 none - x x x Comparative example 2 Petrolatum primer 3 50 Petrolatum anti-corrosion tape layer 3 60 1617 Oxygenated Coatings <1 x 〇 x Comparative example 3 Petrolatum primer 3 50 Petrolatum anti-corrosion tape layer 2 100 1410 Oxygenated Coatings <1 x 〇 x Comparative example 4 Petrolatum primer 1 90 Petrolatum anti-corrosion tape layer 3 60 1617 Oxygenated Coatings <1 x 〇 x Comparative Example 5 Petrolatum primer 1 90 Petrolatum anti-corrosion tape layer 1 120 1060 none - 〇 x 〇

As shown in Table 1, the oil-free analysis of Examples 1 to 5 shows that the evaluation results of durability (ultraviolet resistance performance) and durability (thermal cycle 1000h+salt spray test 2000h) are excellent, even if used in outdoor environments, such as high-temperature environments Or in places where there is direct sunlight, it also has excellent anti-corrosion performance, excellent heat resistance and adhesiveness, and excellent workability. In addition, the anti-corrosion structures of Examples 1 to 5 added with aluminum hydroxide have flame retardant characteristics, which can effectively deal with sudden fires to a certain extent, reduce the damage to equipment and facilities caused by fires, ensure the safety of personnel and reduce the The damage caused by fire can be used in anti-corrosion protection of equipment or buildings that require flame retardancy.

As shown in Table 1, the evaluation results of at least one of the oil analysis, durability (ultraviolet resistance performance) and durability (thermal cycle 1000h+salt spray test 2000h) of Comparative Examples 1 to 5 are poor, and none of them can be used as outdoor products. It is used in anti-corrosion structures expected in the environment. Industrial availability

The anti-corrosion structure of the present invention can be used in an outdoor environment, even when it is used in a high-temperature environment or a place exposed to direct sunlight, it can also have excellent anti-corrosion performance, can effectively block ultraviolet rays, has a long anti-corrosion life, and has excellent coating performance and excellent corrosion resistance. Excellent appearance, heat resistance, UV resistance and workability are also excellent. In addition, the anti-corrosion structure of the present invention is suitable for coating and anti-corrosion of structures of any shape, and has wide application prospects in outdoor environments.

1: Base coat 2: Petrolatum anti-corrosion belt layer 3: UV blocking layer 4: Anti-corrosion clay layer 10: Anti-corrosion structure

Fig. 1 is a cross-sectional view schematically showing the structure of an anti-corrosion structure according to one embodiment of the present invention. Fig. 2 is a cross-sectional view schematically showing the structure of an anti-corrosion structure according to another embodiment of the present invention.

Claims (9)

An anti-corrosion structure, characterized in that it has: Petrolatum anti-corrosion tape layer; a primer layer, said primer layer being disposed on one side of said petrolatum-based anti-corrosion tape layer; and an ultraviolet blocking layer, the above-mentioned ultraviolet blocking layer is arranged on the opposite side of the above-mentioned petrolatum anti-corrosion belt layer to the above-mentioned primer layer, The heat-resistant flow-down temperature of the above-mentioned petrolatum anti-corrosion tape layer is above 90°C, The above-mentioned petrolatum anti-corrosion tape layer has a peel strength of 600 N/m or more, The above-mentioned petrolatum anti-corrosion belt layer includes temperature-resistant lifting material A5, The above-mentioned temperature-resistant lifting material A5 includes organic bentonite and/or crystalline wax, The heat-resistant flow-down temperature of the above primer layer is above 70°C. Such as the anti-corrosion structure of claim 1, wherein the above-mentioned petrolatum anti-corrosion belt layer further includes base oil A1, The content of the above-mentioned heat-resistant lifting material A5 is 10 to 40 parts by mass relative to 100 parts by mass of the above-mentioned base oil A1. Such as the anti-corrosion structure of claim 1, wherein the above-mentioned petrolatum anti-corrosion tape layer further includes base oil A1 and inorganic filler A2, The content of the above-mentioned inorganic filler A2 is 50 to 120 parts by mass relative to 100 parts by mass of the above-mentioned base oil A1. The anti-corrosion structure according to claim 3, wherein the above-mentioned inorganic filler A2 includes at least one selected from the group consisting of talc powder, aluminum hydroxide, and magnesium hydroxide. The anti-corrosion structure according to any one of claims 1 to 4, wherein the petrolatum-based anti-corrosion tape layer has flame retardant properties. The anticorrosion structure according to any one of claims 1 to 5, wherein the primer layer is formed of a primer composition, The above-mentioned primer composition comprises a petrolatum primer composition or an oxidative polymerization type primer composition, The above-mentioned petrolatum primer composition comprises a temperature-resistant lifting material B5, Preferably, the above-mentioned heat-resistant lifting material B5 includes organic bentonite and/or crystalline wax. The anti-corrosion structure according to claim 6, wherein the above-mentioned petrolatum primer composition further comprises base oil B1, The content of the above-mentioned heat-resistant lifting material B5 is 5 to 80 parts by mass relative to 100 parts by mass of the above-mentioned base oil B1. The anticorrosion structure according to any one of claims 1 to 7, wherein the ultraviolet transmittance of the ultraviolet blocking layer is 1% or less. The anti-corrosion structure according to any one of claims 1 to 8, wherein the above-mentioned anti-corrosion structure further includes an anti-corrosion mud layer, and the above-mentioned anti-corrosion mud layer is arranged between the above-mentioned undercoat layer and the above-mentioned petrolatum anti-corrosion belt layer .

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