JP7355908B1 - Two-component base conditioner and aerosol base conditioner - Google Patents

Abstract

[Problem] It is possible to sufficiently penetrate the rust layer and fix the rust, forming a coating film with excellent long-term corrosion protection.It has excellent drying properties and workability, and can also be applied to aerosol applications. Provides a texture conditioner. [Solution] A curing agent containing a main resin (a) having a weight average molecular weight of 5,000 to 20,000 and an epoxy equivalent of 500 to 900 g/eq, and a compound (b) that reacts with the epoxy group of the epoxy resin. A two-component surface conditioning agent comprising a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon in at least one of the main agent or the curing agent, and the main agent is a two-component texture conditioner characterized by a Ford Cup No. 4 viscosity of 10 to 27 seconds at a temperature of 23°C. Moreover, it is an aerosol base conditioner containing the two-component base conditioner and a propellant (e). [Selection diagram] None

Description

The present invention relates to a two-component base conditioner and an aerosol base conditioner.

When it is time to repaint an existing steel structure, there is usually a lot of red rust on the steel surface, and even if you simply repaint such a surface, the paint film will gradually blister and peel, resulting in long-term problems. Period protection is not possible. Therefore, before repainting, it was necessary to perform physical rust removal treatment (substrate preparation) of type 3 or higher, such as blasting, and then apply the paint. Since large amounts of dust and noise are generated during work, the work environment and work efficiency are extremely poor. In addition, even when Type 2 or Type 3 staining is applied to the surface of steel materials, it is difficult to remove rust from the hollows and narrow areas of steel structures, and the interface between the rust layer and the iron base at those locations is exposed to Cl ^- and SO. ₄ ^2- and other highly corrosive ionic substances tend to remain, so even if repainted, the corrosion protection at that location would be significantly reduced.
As a method for solving such problems, there is a method of applying a coating-type surface conditioner that fixes corrosive ionic substances after rust removal treatment (surface preparation).

As such a surface conditioner, for example, Patent Document 1 describes a method containing (a) a moisture-curable resin, (b) an anti-rust pigment, (c) a corrosive ion fixing agent, and (d) a coupling agent. A surface conditioner is disclosed. Further, Patent Document 2 discloses a substrate conditioning agent containing (a) a binder, (b) a water absorbing agent, and (c) a corrosive ion fixing agent. Note that the moisture-curable resin-based texture conditioner described in Patent Document 1 requires appropriate control of the moisture content of the raw material, and there are restrictions on the raw materials that can be used. Therefore, a non-moisture curing type of substrate conditioning agent (for example, the epoxy resin-based two-component substrate conditioning agent described in Patent Document 2) is also being developed.

These days, such coating-type substrate conditioners are required to have quick drying properties (curing properties) especially at low temperatures (for example, 5° C.) from the viewpoint of process control. However, the non-moisture-curing type substrate conditioner (for example, epoxy resin-based two-component substrate conditioner) described in Patent Document 2 did not have sufficient quick drying properties at low temperatures.

Furthermore, from the viewpoint of ease of painting, it is also desired to apply a surface conditioner to an aerosol spray. However, when the texture conditioning agents of Patent Document 1 and Patent Document 2 are applied to aerosol sprays, the corrosive ion fixing agent tends to settle, which poses problems with storage stability. However, it has not been easy to apply to aerosol sprays because the components of the aerosol sprays may swell.

Japanese Patent Application Publication No. 2002-285362 Japanese Patent Application Publication No. 2003-328162

Therefore, as a result of intensive studies by the inventors of the present application to address the issues with conventional surface conditioners, we have developed an epoxy resin having a specific weight average molecular weight and epoxy equivalent range, together with a specific curing agent, and By appropriately selecting the solvent and optimizing the viscosity, it has the ability to penetrate the rust layer and fix rust, which acts as a substrate conditioning agent, while also providing corrosion protection properties such as rust fixation. The present invention was completed by discovering a substrate conditioner that has excellent drying properties and is also applicable to aerosol applications such as aerosol sprays.

Therefore, the purpose of the present invention is to have corrosion resistance such as penetration into the rust layer and fixation of rust, but also to have excellent quick drying properties at low temperatures, and to be applicable to aerosol applications such as aerosol sprays. An object of the present invention is to provide a solvent-type substrate conditioning agent.

That is, the gist of the present invention is as follows.
(1) A curing agent containing a main agent containing an epoxy resin (a) having a weight average molecular weight of 5,000 to 20,000 and an epoxy equivalent of 500 to 900 g/eq, and a compound (b) that reacts with the epoxy group of the epoxy resin. A two-part conditioner comprising:
At least one of the base agent or the curing agent contains a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon,
The base agent is a two-component base conditioner characterized in that the viscosity of Ford Cup No. 4 at a temperature of 23° C. is 10 to 27 seconds.
(2) The two-part conditioner according to (1), wherein the compound (b) that reacts with the epoxy group contains at least ketimine and phenalkamine.
(3) Contains a main resin containing an epoxy resin (a) having a weight average molecular weight of 5,000 to 20,000 and an epoxy equivalent of 500 to 900 g/eq, and a curing agent containing a compound (b) that reacts with the epoxy group. Including a two-component base conditioner and (e) a propellant,
At least one of the base agent or the curing agent contains a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon,
The aerosol base conditioner is characterized in that the base agent has a Ford Cup No. 4 viscosity of 10 to 27 seconds at a temperature of 23°C.

The two-component surface conditioner and the aerosol surface conditioner (hereinafter either or both may be simply referred to as "surface conditioner") according to the present invention can sufficiently penetrate into the rust layer. Since it can fix rust, it is possible to form a coating film with excellent long-term corrosion resistance, and it also has excellent workability because it dries well at low temperatures. In addition, it can be easily applied to aerosol applications such as aerosol sprays.

The present invention will be described in detail below, but the scope of the present invention is not limited to these descriptions, and modifications other than the following examples may be made as appropriate without departing from the gist of the present invention.

In the present invention, the steel materials to be painted include those made from steel materials processed into plates, rods, pipes, etc., as well as structures, such as roads, towers for power transmission and communication, and bridges. , various plants, etc., but are not limited to these, and metal elements other than iron may also be included. Further, the steel material may be coated with the surface conditioner of the present invention after the old paint film is removed, or may be coated with the old paint film remaining. It may also be applied to steel materials that have rust on their surfaces. Although not limited to steel materials with rust, surface conditioning such as cleaning was performed as a pretreatment on the steel materials whose surfaces were rusted due to corrosive factors such as water, oxygen, chloride ions, and sulfate ions. Refers to steel. Specific pre-treatments include removing fragile areas such as deteriorated paint films and floating rust using a wire brush or Scotchbrite (trade name manufactured by 3M), or removal of fragile areas such as layered rust or bumpy rust. If there is a severely corroded area, it is removed using a power polishing tool or a hand polishing tool, but it is not necessary to remove rust that is fixed on the surface of the steel material. In addition, surface preparation generally refers to the process of removing rust that has formed on the surface of steel materials, dirt such as attached oils, dust, dirt, tar, and old paint films before painting. Specifically, depending on the work content and method, type 1 cleaning (using a blasting method to remove all rust and old paint film and exposing the surface of the steel material), type 2 cleaning (using power tools and hand tools) Used in combination to remove old paint film and rust and expose the steel surface), type 3 cleaning (used in combination with power tools and hand tools to leave a healthy paint film, but remove cracks in other paint films, (removing defective parts such as blisters and rust), and four types of cleaning (removing powdered materials, dirt, etc. using both power tools and hand tools). In other words, substrate preparation at the level of cleaning corresponds to, but is not limited to, treatment at the level of four types of cleaning.

[Two-component base conditioner]
The present invention includes a two-component conditioner containing a base agent and a hardening agent as described below, and when this is applied to the rusted steel material described above, the base agent and hardener react with each other while penetrating well into the rust layer. By curing and fixing the rust layer existing on the surface of the steel material, it is possible to strengthen the corrosion resistance of the surface of the steel material. The main agent and curing agent will be specifically explained below.

<Main ingredient>
The base agent used in the two-part conditioner of the present invention contains at least an epoxy resin (a) having a weight average molecular weight of 5,000 to 20,000 and an epoxy equivalent of 500 to 900 g/eq. Further, it may also contain a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon, which will be described later. Further, the base agent has a Ford Cup No. 4 viscosity of 10 to 27 seconds at a temperature of 23°C.

[Epoxy resin (a)]
Epoxy resin (a) is the main resin component forming the coating film of the two-component surface conditioner used in the present invention. The weight average molecular weight (Mw) of the epoxy resin is 5,000 to 20,000. A preferable lower limit of the weight average molecular weight is 7,000 or more, a more preferable lower limit is 9,000 or more, and an even more preferable lower limit is 10,000 or more. On the other hand, a preferable upper limit of the weight average molecular weight is 19,000 or less, a more preferable upper limit is 18,000 or less, and an even more preferable upper limit is 17,000 or less. If the weight average molecular weight is less than 5,000, the formed coating film may have poor solvent resistance and may also have poor curability (especially low temperature curability). On the other hand, if the weight average molecular weight exceeds 20,000, the permeability of the surface conditioner into the rust layer will be poor, and there is a possibility that anticorrosion properties may not be obtained.

Further, the epoxy equivalent of the epoxy resin (a) is 500 to 900 g/eq. A preferable lower limit of the epoxy equivalent is 550 g/eq or more, a more preferable lower limit is 600 g/eq or more, and an even more preferable lower limit is 650 g/eq or more. On the other hand, a preferable upper limit of the epoxy equivalent is 850 g/eq or less, a more preferable upper limit is 800 g/eq or less, and an even more preferable upper limit is 780 or less. If the epoxy equivalent is less than 500, the formed coating film may have poor solvent resistance and may also have poor curability (especially low temperature curability). On the other hand, if the epoxy equivalent is more than 900, the curability (especially low-temperature curability) of the formed coating film may be poor.

The structure of the epoxy resin (a) is not limited as long as it satisfies both the above-mentioned weight average molecular weight and epoxy equivalent, and the epoxy resin (a) may be a known epoxy resin or modified by a known method. It may also be a modified epoxy resin. Known epoxy resins include glycidyl ether type epoxy resins, glycidyl ester type epoxy resins, alicyclic type epoxy resins, aromatic type epoxy resins, and the like. Among these, preferred are glycidyl ether type epoxy resins, including bisphenol A type epoxy resins, bisphenol F type epoxy resins, biphenyl type epoxy resins, phenol novolak type epoxy resins, and cresol novolac type epoxy resins.

Moreover, the modification method for the modified epoxy resin is not limited. For example, the epoxy resin described above may be modified using a known modifier. For example, depending on the modifier, amine modification, isocyanate modification, acrylic modification, polyester modification, urethane modification, fatty acid modification, phenol modification, alkylphenol modification, phenol novolak modification, alkylphenol novolak modification, etc. may be mentioned.

As a preferred embodiment of the epoxy resin (a) used in the present invention, it is preferable to use a modified epoxy resin from the viewpoint of ease of adjusting the weight average molecular weight and epoxy equivalent within the above ranges. Among these, phenol-modified epoxy resins, alkylphenol-modified epoxy resins, phenol novolak-modified epoxy resins, and alkylphenol novolak-modified epoxy resins are more preferred from the viewpoint of improving drying properties and improving dilutability to weak solvents.
Examples of phenol-modified epoxy resins, alkylphenol-modified epoxy resins, phenol novolak-modified epoxy resins, or alkylphenol novolak-modified epoxy resins include glycidyl ether type epoxy resins, glycidyl ester type epoxy resins, alicyclic type epoxy resins, and aromatic type epoxy resins. A method of modifying at least one kind of epoxy resin selected from the following with a phenol resin, an alkylphenol resin, a phenol novolak resin, or an alkylphenol novolak resin, or a method of reacting a phenol resin, an alkylphenol resin, a phenol novolak resin, or an alkylphenol novolak resin with epichlorohydrin. It can be obtained by

When using a modified epoxy resin, it is preferably modified so that a predetermined amount of epoxy groups remain so as to satisfy the above-mentioned epoxy equivalent, from the viewpoint of reactivity with the curing agent described below. The amount of modification can be adjusted as appropriate, including the aforementioned weight average molecular weight, epoxy equivalent, type of modification, etc., within a range that does not impair the object of the present invention.

Moreover, in the present invention, the epoxy resin (a) can be used in combination of two or more types. When two or more types are used in combination, each average value of the weight average molecular weight and epoxy equivalent is used in consideration of the mixing ratio of the mixture of those resins.

The amount of the epoxy resin (a) to be used can be adjusted as appropriate based on the viscosity (penetration into the rust layer), the curability and corrosion resistance of the coating film, and the like. The amount of the epoxy resin (a) to be used is preferably 10 to 70% by weight, more preferably 20 to 60% by weight, and even more preferably 30 to 50% by weight in the base resin as a solid content.

[Viscosity of main agent]
In the present invention, the viscosity of the base agent is 10 to 27 seconds as measured by Ford Cup No. 4 at a temperature of 23°C. If it is less than 10 seconds, the viscosity is too low, and depending on the surface to be coated, liquid dripping may occur, or the ingredients may tend to settle. On the other hand, if the time exceeds 27 seconds, the permeability into the rust layer may be insufficient when used as a surface conditioner. Preferably, the number of seconds in the measurement ranges from 12 to 25 seconds, more preferably from 15 to 23 seconds. With such viscosity characteristics, when used as a substrate conditioning agent, it has good permeability into the rust layer and excellent workability. Moreover, especially when used as a base conditioner for aerosols, it is suitable that the viscosity is defined based on the viscosity measured with the Ford Cup No. 4. In order to achieve the viscosity, it is preferable to appropriately adjust the solid content and the amount of solvent added to the base agent.

[Corrosive ion fixing agent (c)]
The main agent used in the present invention is a compound that collects corrosive ions such as Cl ^- and SO ₄ ^2- that exist at the interface between the rust layer and the steel material base, chemically reacts with them, and fixes them as water-insoluble double salts. It is preferable to further include a corrosive ion fixing agent (c) for inactivation. As such a corrosive ion fixing agent (c), known ones can be used, and typical examples include hydrocalumite and hydrotalcite. The content of the corrosive ion fixing agent (c) in the base agent is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass. As described later, the corrosive ion fixing agent is not limited to being incorporated into the main agent, but since it absorbs water, the ketimine in the hardening agent will react with the water, so it may not be included in the main agent. Preferably, it is contained.

Hydrocalumite has the formula: 3CaO・Al ₂ O ₃・CaX ₂ /m・nH ₂ O (wherein, X is a monovalent or divalent anion, m represents the valence of the anion, and n is a hydrated crystalline powder with a layered structure represented by 20 or less. Representative examples of the anion (X) include NO ₃ ^- , NO ₂ ^- , OH ^- , CH ₃ COO ^- , CO ₃ ^2- , and the like. When these anions come into contact with chloride ions, sulfate ions, etc., they undergo anion exchange, liberating NO ₃ ⁻ , NO ₂ ^−, etc., which are X, and immobilizing (carrying) corrosive ionic substances in hydrocalumite. , inactivate. Moreover, the liberated anions form a passive film on the surface of the steel material, which has the effect of further improving corrosion resistance.

Hydrotalcite is typically represented by the formula: Mg _4.5 Al ₂ (OH) ₁₃ CO ₃ .nH ₂ O (where n is 4 or less, preferably 3.5). It is a water-containing crystalline powder with a layered structure similar to hydrocalumite, and when it comes in contact with corrosive ionic substances, it undergoes anion exchange and has the ability to immobilize corrosive ions in hydrotalcite and prevent them from leaving the crystal structure. It is something.

[Solvent (d) containing aliphatic hydrocarbon]
The main ingredient in the present invention may contain an organic solvent to the extent that the purpose of the present invention is not impaired. Any known organic solvent can be used, but weak solvents are often used in consideration of the effect on the old paint film and the effect on plastic parts such as packing when used in aerosol applications. The solvent (d) contains an aliphatic hydrocarbon. The aliphatic hydrocarbon-containing solvent (d) includes, but is not limited to, mineral spirits (including mineral thinner, petroleum spirit, white spirit, and mineral turpentine), solvent naphtha, turpentine, n-hexane, n-pentane, Examples include n-octane, n-nonane, n-decane, n-undecane, and n-dodecane. Among these, it is preferable to use mineral spirit from the viewpoints of solubility and drying properties of the epoxy resin (a). Note that mineral spirit is a mixed solvent of petroleum-based hydrocarbons equivalent to JIS industrial gasoline No. 4, and falls under the category 3 organic solvent under the Organic Solvent Poisoning Prevention Regulations (Industrial Safety and Health Act).

The organic solvent may be composed only of the aliphatic hydrocarbon, or may be a mixed solvent with other organic solvents. Examples of other organic solvents include organic solvents commonly used in paints. For example, glycol ether solvents (cellosolves) such as propylene glycol monomethyl ether, ethylene glycol monobutyl ether, and diethylene glycol monobutyl ether, ketone solvents such as isophorone, cyclohexanone, methyl ethyl ketone, methyl isobutyl ketone, and acetone, n-butyl acetate, and ethyl acetate. , ester solvents such as butyl acetate, aromatic hydrocarbon solvents such as toluene, xylene, and ethylbenzene, alcohol solvents such as methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, and n-butyl alcohol, etc. . One or more kinds of other organic solvents can be mixed with the aliphatic hydrocarbon.

As the strong solvent component increases, the influence on the old paint film as described above and the influence on aerosol applications increases. Therefore, it is preferable that the aliphatic hydrocarbons contain 60% of the organic solvent used. It is preferably at least 70% by mass, more preferably at least 85% by mass. As described below, the solvent (d) containing the aliphatic hydrocarbon is not limited to being incorporated into the base resin, but from the viewpoint of dissolving the epoxy resin (a) and appropriately adjusting the viscosity of the base resin, It is preferably contained in the main ingredient.

Here, the amount of the solvent (d) containing an aliphatic hydrocarbon to be used is not limited as long as it satisfies the viscosity range of the base resin, but it is usually contained in the base resin in an amount of about 30 to 75% by mass. The upper limit of the preferable content of component (d) in the base agent is 65% by mass or less. On the other hand, a preferable lower limit is 35% by mass or more.

[Other ingredients]
The main ingredient in the present invention may contain other components other than those mentioned above, within a range that does not impede the purpose of the present invention. For example, for ordinary paints such as anti-corrosion pigments, extender pigments, colored pigments, pigment dispersants, surface conditioners, anti-sagging agents (anti-settling agents), silane coupling agents, antifoaming agents, dryers, anti-skinning agents, etc. All additives can be included. These other components are preferably added in an amount of 0 to 30% by mass in the main agent, and can be appropriately selected and blended depending on the purpose. Among these, it is preferable for the purpose of the present invention to use at least an anti-rust pigment and an anti-sagging agent (an anti-settling agent).

Known anti-rust pigments can be used, including aluminum phosphate, condensed aluminum phosphate, zinc phosphate, aluminum phosphite, zinc phosphite, calcium phosphite, zinc strontium phosphite, etc. Molybdates such as (nitrite) phosphates, zinc molybdate, calcium molybdate, and manganese molybdate; other metal salts of various acids such as stearic acid, tannic acid, citric acid, itaconic acid, boric acid, and tungstic acid. Examples include. It is preferably 0 to 30% by weight, more preferably 5 to 20% by weight in the main ingredient.

The use of an anti-sag agent (anti-settling agent) is preferable because it prevents sedimentation of other components of the main ingredient, particularly the corrosive ion fixing agent, and improves storage stability. Examples of the anti-sagging agent (settling agent) include, but are not limited to, organic bentonite, finely powdered silica, colloidal calcium carbonate, castor oil derivatives, and the like. It is preferably 0 to 10% by mass, more preferably 0.5 to 5% by mass in the main ingredient.

<Curing agent>
The curing agent used in the two-part conditioner of the present invention contains at least a compound (b) that reacts with the epoxy group in the epoxy resin (a). Such a compound (b) can be used without any restriction as long as it can react with the epoxy group in the epoxy resin (a) to form a cured coating film. Examples include phenolic compounds, acid anhydride compounds, and amine compounds. Among these, amine compounds can be preferably used from the viewpoint of reactivity.

Specific examples of amine compounds include polyamine compounds such as aliphatic polyamines, alicyclic polyamines, aromatic polyamines, polyamide amines, and heterocyclic amines; and modified products of these polyamine compounds, such as fatty acid-modified polyamide amines. Examples include amine adducts with epoxy compounds, Mannich modifications (eg, phenalkamine, phenalkamide), Michael adducts, ketimines, and aldimines. These can be used alone or in combination of two or more.

For example, examples of aliphatic polyamines include ethylenediamine, trimethylenediamine, tetramethylenediamine, pentamethylenediamine, triaminopropane, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine. In addition, examples of alicyclic polyamines include 1,4-cyclohexanediamine, diaminodicyclohexylmethane (especially 4,4'-methylenebiscyclohexylamine), 4,4'-isopropylidenebiscyclohexylamine, norbornanediamine, and bis(aminodicyclohexylamine). Methyl)cyclohexane, isophoronediamine, 1,3-bisaminomethylcyclohexane, menthenediamine (MDA), 2,4-di(4-aminocyclohexylmethyl)aniline, and the like. Further, examples of aromatic polyamines include phenylene diamine, metaxylylene diamine, paraxylylene diamine, and diaminodiphenylmethane. Furthermore, examples of the polyamide amine include those having reactive monoamines and diamines in the molecule, which are produced by a condensation reaction of a dicarboxylic acid and the polyamine compound. Examples of the heterocyclic amine include 1,4-diazacycloheptane, 1,11-diazacycloeicosane, and 1,15-diazacyclooctacosane.

Among the amine compounds, the curing agent of the present invention preferably contains ketimine and phenalkamine. Including these ketimine and phenalkamine in the curing agent provides particularly excellent low-temperature curing properties.

（式中、Ｒ₁は水素原子であるか、又はアルキル基、シクロアルキル基等の１価の炭化水素基を表し、Ｒ₂はアルキル基、シクロアルキル基等の１価の炭化水素基を表す。）で示すことができる。ここで、Ｒ₁が水素原子の場合、アルジミン化合物である。 [Kechimin]
Here, the ketimine is a polyamine having at least one primary amino group blocked with a carbonyl compound in one molecule, and includes aldimine compounds. The ketimine can be obtained by a dehydration condensation reaction between a carbonyl compound and a primary amino group. The above-mentioned "primary amino group blocked with a carbonyl compound" is a protected amino group that can be easily hydrolyzed and converted into a free primary amino group in the presence of moisture, and typically ,formula

(In the formula, R ₁ is a hydrogen atom or represents a monovalent hydrocarbon group such as an alkyl group or a cycloalkyl group, and R ₂ represents a monovalent hydrocarbon group such as an alkyl group or a cycloalkyl group. ) can be shown. Here, when R ₁ is a hydrogen atom, it is an aldimine compound.

The polyamine compound before being blocked with a carbonyl compound may be any of aliphatic, alicyclic and aromatic compounds. Further, polyamides may be used as long as they have a primary amino group. The polyamine compound needs to have a primary amino group that undergoes a curing reaction with the epoxy resin, but generally has a primary amino group of about 2,000 or less, preferably in the range of about 30 to about 1,000. It is advantageous to have primary amino group equivalents. It is also preferred that the polyamine compound generally have a number average molecular weight within the range of about 5,000 or less, preferably about 3,000 or less.

Examples of the above polyamine compounds include aliphatic polyamines such as ethylenediamine, propylene diamine, butylene diamine, hexamethylene diamine, diethylene triamine, triethylene tetramine, and pentaethylene hexamine; aromatic polyamines such as metaxylene dimine, diaminodiphenylmethane, and phenylene diamine. alicyclic polyamines such as isophorone diamine, cyclohexylpropylamine, 1,3-bisaminomethylcyclohexane, norbornene diamine; and polyamines having a primary amino group at the end of the molecule.

Among the above-mentioned polyamine compounds, the ketiminated polyamine compound that does not contain a secondary amino group in its molecule, that is, has only a primary amino group, has poor storage stability after being mixed with the epoxy resin (A). It is particularly suitable because it is good. Therefore, when using a ketimine compound having a secondary amino group in the molecule, it is desirable to use it as an adduct compound in which the secondary amino group is reacted with the above-mentioned epoxy resin.

As the carbonyl compound that can be used to ketiminate the above polyamine compound, any commonly used ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl isopropyl ketone, diisobutyl ketone, methyl-t-butyl ketone, cyclohexanone can be used. etc. can be mentioned. Furthermore, examples of carbonyl compounds that can be used to aldiminate polyamine compounds include aldehydes such as acetaldehyde and benzaldehyde.

Specific commercial examples of ketimine include, for example, ADEKA Hardener EH-235 series (manufactured by ADEKA Corporation).

When ketimine is used, it is preferably contained in the curing agent in an amount of 20% by weight or less, more preferably 15% by weight or less, even more preferably 10% by weight or less, even more preferably 8% by weight or less. A preferable lower limit in the curing agent is 0.1% by mass or more, a more preferable lower limit is 1% by mass or more, an even more preferable lower limit is 2% by mass or more, and an even more preferable lower limit is 3% by mass. That's all.

These ketimines can be used alone or in combination of two or more.

[Phenalkamine]
Phenalkamine is usually obtained by Mannich base reaction of phenolic compounds, aldehyde compounds and amine compounds.

Examples of phenolic compounds include phenols containing unsaturated substituents such as cardanol extracted from cashew nut shell liquid, phenols containing saturated substituents, and phenols having no substituents.

Phenols may be monovalent or polyvalent, and may be mononuclear or polynuclear. Specific examples of phenols include phenol, which is a monovalent mononuclear phenol; resorcinol and hydroquinone, which are divalent mononuclear phenols; and 1,5-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, and 2, which are divalent polynuclear phenols. , 6-dihydroxynaphthalene. Further examples include alkylphenol (carbon number of alkyl group: 1 to 30), halogenated phenol, alkoxyphenol (carbon number of alkoxy group: 1 to 30), bisphenol A, and bisphenol F.

Examples of alkylphenols include monohydric phenols such as methylphenol (o, m or p-cresol), ethylphenol, butylphenol, t-butylphenol, octylphenol, nonylphenol, dodecylphenol, and dinonylphenol, and examples of halogenated phenol include chlorophenol. Examples include monohydric phenols such as phenol, and examples of alkoxyphenols include methoxyphenol.

In addition, unsaturated substituent-containing phenols include at least one monohydroxyphenyl group in the molecule, and some of the hydrogen atoms in the phenyl group, that is, 1 to 5 of the hydrogen atoms, are unsaturated. Examples include compounds substituted with hydrocarbon groups. Examples of the unsaturated hydrocarbon group include an alkylene group having 1 to 30 carbon atoms or a phenyl group containing this. Specific examples of unsaturated substituent-containing phenols include cardanol, isopropenylphenol, diisopropenylphenol, butenylphenol, isobutenylphenol, cyclohexenylphenol, and monostyrenated phenol (C ₆ H ₅ - CH=CH-C ₆ H ₄ -OH) and distyrenated phenol ((C ₆ H ₅ -CH=CH) ₂ -C ₆ H ₃ -OH).

Examples of aldehyde compounds include formaldehyde, paraformaldehyde, acetaldehyde, and the like.

Examples of amine compounds include aliphatic polyamines such as ethylenediamine, propylene diamine, butylene diamine, hexamethylene diamine, diethylene triamine, triethylene tetramine, and pentaethylene hexamine; aromatic polyamines such as metaxylene dimine, diaminodiphenylmethane, and phenylene diamine; isophorone; Examples include alicyclic polyamines such as diamine, cyclohexylpropylamine, 1,3-bisaminomethylcyclohexane, and norbornene diamine; and polyamines having a primary amino group at the end of the molecule.

Phenalkamine is commercially available. For example, Aradur3440, Aradur3441, Aradur3442, Aradur3460, Aradur3462 (all manufactured by Huntsman), NC-541, NC-541LV, NC-558, NC-641, NX2003, LTE-2001, etc. , both Cardolite (manufactured by Paladin Paints and Chemicals), PPA-7041-LV, PPA-7062, PPA-7088, PPA-7009, PPA-7090, PPA-7108, PPA-7115, etc. (all manufactured by Paladin Paints and Chemicals), RAC951LV, RAC909 5LC (manufactured by Royce International) can be cited as a specific example. In addition to these, each company has a wide range of products, and you can use the products listed in their catalogs. These may be used alone or in combination of two or more.

When using phenalkamine, it is preferably contained in the curing agent in an amount of 70% by mass or less, more preferably 60% by mass or less, still more preferably 50% by mass or less, and even more preferably 45% by mass or less. A preferable lower limit in the curing agent is 5% by mass or more, a more preferable lower limit is 10% by mass or more, an even more preferable lower limit is 20% by mass or more, and an even more preferable lower limit is 25% by mass or more. be.

One type or two or more types of these phenalkamines can be used.

Regarding the usage amount of the amine compound suitable as the compound (b) as exemplified above, the functional group (contained in the amine compound or generated therefrom) is The equivalent ratio (active hydrogen equivalent/epoxy equivalent) of active hydrogen is preferably 0.5 to 1.5, more preferably 0.6 to 1.3, and even more preferably 0.7 to 1.2. From the viewpoint of coating film drying properties and curability, it is preferable that it is within the following range.

In the curing agent, the content of the compound (b) is not particularly limited as long as it satisfies the equivalent ratio with the epoxy resin (a) as described above. It is preferable that the viscosity (described later) be adjusted from the viewpoint of workability and the like. The amount of compound (b) in the curing agent is preferably 20 to 90% by weight, more preferably 30 to 80% by weight, even more preferably 35 to 70% by weight.

[Other ingredients]
Note that, as described above, the curing agent may include the corrosive ion fixing agent (c) and/or the aliphatic hydrocarbon-containing solvent (d). When these components (c) and (d) are contained in the curing agent, the amount of the corrosive ion fixing agent (c) is preferably about 0.1 to 10% by mass. Further, the amount of the solvent (d) containing an aliphatic hydrocarbon is usually preferably 10 to 80% by mass, more preferably 20 to 70% by mass, and still more preferably 30 to 65% by mass.

Further, in the curing agent, as well as the main ingredient, other components other than the above-mentioned compounds (b) and (c) to (d) may be blended within a range that does not impair the purpose of the present invention. For example, for ordinary paints such as anti-corrosion pigments, extender pigments, colored pigments, pigment dispersants, surface conditioners, anti-sagging agents (anti-settling agents), silane coupling agents, antifoaming agents, dryers, anti-skinning agents, etc. All additives can be included. These other components are preferably added in an amount of 0 to 10% by mass in the curing agent, and can be appropriately selected and blended depending on the purpose.

[Viscosity of curing agent]
In the present invention, the viscosity of the curing agent is preferably about the same as the viscosity of the above-mentioned main agent, and more preferably the viscosity of Ford Cup No. 4 at a temperature of 23° C. is 10 to 27 seconds.

The two-component texture conditioner of the present invention has a solid content when the above-mentioned base agent and hardening agent are mixed with other components (same as the above-mentioned other components) that are added separately from the base agent and hardener if necessary. can be adjusted as appropriate depending on workability and viscosity after mixing (during coating). For example, the solid content of the two-component texture conditioner after mixing is preferably 45 to 85% by mass, more preferably 50 to 70% by mass.

[Surface conditioner for aerosol]
The aerosol base conditioner of the present invention includes the two-component base conditioner described above and a propellant (e). Furthermore, other known components applicable to aerosol applications can be used within the range that does not impair the purpose of the aerosol application. The other components may be other components that can be blended into the base agent and/or curing agent described above, and may be used as the base agent and/or curing agent, and may be used when mixed with the propellant (e). It's okay.

Here, "for aerosol" means that the desired contents are sealed together with a propellant (e) in a pressure-resistant aerosol container equipped with an injection valve, such as a spray can, and the contents are turned into an aerosol. Describes the purpose for which it is used. Various known containers can be used as the pressure-resistant container. Furthermore, the structure for mounting the injection valve can be appropriately selected depending on the type of pressure container. A common spray container (spray can) is preferably used.

The propellant (e) is not limited, and those commonly used in aerosolization can be used without restriction. For example, liquefied or compressed gases are used. You may use liquefied gas and compressed gas together. Preferably it contains liquefied gas. In the aerosol base conditioner of the present invention, the two-component base conditioner and propellant (e) are preferably mixed and filled into an aerosol container.

The liquefied gas is not limited, and hydrocarbons such as dimethyl ether (DME), liquefied natural gas (LNG), liquefied petroleum gas (LPG), isopentane, and hydrofluoroolefins such as HFO-1234ze are preferred. More preferred is DME.

Further, the compressed gas is not limited, and any known compressed gas that can be used in aerosol products can be used. Preferably, carbon dioxide gas, nitrogen gas, nitrous oxide gas, argon, helium, compressed air, etc. are preferable, and at least one of carbon dioxide gas and nitrogen gas is more preferable.

When used as a base conditioner for aerosol, the amount of the two-component base conditioner and propellant (e) used is 30:70 to 70 as a volume ratio [two-component base conditioner: propellant (e)]. :30, more preferably 50:50.

The method for producing the aerosol base preparation is not limited, and may be appropriately selected from known methods for producing hair styling aerosol sprays. For example, there is a method of manufacturing by filling an aerosol container with a two-component base preparation prepared by mixing a base agent and a curing agent in appropriate amounts, and a propellant (e). The base agent, curing agent and propellant (e) may be mixed at the same time.

[How to use surface conditioner]
As mentioned above, when the two-component base conditioner and the aerosol base conditioner of the present invention prepared in this way are applied to rusted steel materials, they are used as a pre-treatment to remove fragile coatings such as deteriorated coating films and floating rust. Remove the areas with a wire brush, Scotchbrite (trade name manufactured by 3M), etc. If there are areas with significant corrosion such as layered rust or bumpy rust, remove them with a power polishing tool or hand polishing tool. It is preferable to do so. However, there is little need to remove solidified rust.

As for the coating method, any ordinary coating means other than spraying, such as brushes and rollers, can be used as the two-component conditioner without any limitations. Among these, brushes and rollers are preferably used from the viewpoint of workability and paint scattering. Further, as the aerosol base conditioner, a spray or the like can be used as described above. The coating amount is approximately 0.03 to 0.2 kg/m ² in terms of solid content, and the coating is allowed to air dry. In addition, the viscosity at the time of painting the base conditioner is preferably 10 seconds to 27 seconds (temperature 23 degrees Celsius) with Ford Cup No. 4, from the viewpoint of sufficiently penetrating into the rust layer. More preferably, the viscosity is 10 seconds to 27 seconds (temperature 23° C.) using Ford Cup No. 4. That is, in the base conditioner of the present invention, the viscosity after mixing the base agent and curing agent is preferably maintained at 10 seconds to 27 seconds (temperature 23 ° C.) for 3 hours or more in Ford Cup No. 4, more preferably. It is more than 5 hours.

The surface conditioner of the present invention coated as described above can be dried at room temperature. Here, normal temperature refers to 23° C., although it varies depending on the atmospheric temperature of the environment in which painting is performed, and refers to the absence of forced temperature manipulation such as heating or cooling. The surface conditioner of the present invention is preferably applied in an environment at a temperature of 5 to 35°C.

It is preferable that the surface conditioner of the present invention is sufficiently penetrated into the rust layer during the painting, but as an indicator of its permeability there is cross-sectional observation. The state of element distribution in the cross section of a painted rusted steel plate can be measured using methods such as an electron beam microanalyzer.

In the present invention, after the above-mentioned surface conditioner is applied to a steel material with rust on the surface to form a coating film, it can be used as a base coat, intermediate coat, top coat, etc. One or more paints that can be used can be appropriately selected for painting. For example, at least one member selected from the group consisting of acrylic resin paint, urethane resin paint, epoxy resin paint, chlorinated polyolefin paint, silicone resin paint, and fluororesin paint is added to the surface conditioner. It is preferable to form a coating film by applying the coating material containing the coating material preferably 1 to 4 times. The above-mentioned paint to be applied over the surface conditioner is appropriately selected depending on the paint and is not limited, but preferably, the total thickness of the formed paint film is 55 μm or more. The drying method for the paint that is applied in layers is to dry at room temperature, and the physical properties of the paint film after drying include weather resistance, water resistance, adhesion, alkali resistance, bending resistance, and acid resistance. Desired. The paints used when applying multiple coats are JIS K5551 (anti-corrosion paint for structures) for base coats, JIS K5659 (weather-resistant paint for steel structures, intermediate coats) for intermediate coats, and top coats. Preferably, the paint satisfies the regulations of JIS K5659 (weather-resistant paint for steel structures, top coat).

The present invention will be specifically described below based on Examples and Comparative Examples, but the present invention is not limited to these Examples and Comparative Examples. Note that "parts" and "%" in Examples and Comparative Examples are based on mass unless otherwise specified.

<1. Preparation of main ingredients 1 to 8>
The raw materials listed in Table 1 were sequentially charged into a container, and base ingredients 1 to 8 were prepared by a known manufacturing method. The raw materials listed in Table 1 are as follows.

1) Alkylphenol novolak modified epoxy resin solution 1 (reactant of alkylphenol novolak resin and bisphenol A type epoxy resin, epoxy equivalent: 750, weight average molecular weight (Mw): 16,000, solid content concentration: 70% by mass, mineral spirit (manufactured by Nitto Kasei Co., Ltd.) 30% by mass)
2) Alkylphenol novolac modified epoxy resin solution 2 (reactant of alkylphenol novolac resin and bisphenol A type epoxy resin, epoxy equivalent weight 670, weight average molecular weight 10000, solid content concentration 60% by mass, mineral spirit (manufactured by Nitto Kasei Co., Ltd.) 40% by mass )
3) Alkylphenol novolak modified epoxy resin solution 3 (reactant of alkylphenol novolac resin and bisphenol A type epoxy resin, epoxy equivalent weight 930, weight average molecular weight 6000, solid content concentration 70% by mass, mineral spirit (manufactured by Nitto Kasei Co., Ltd.) 30% by mass )
4) Bisphenol A type epoxy resin solution (epoxy equivalent: 475, weight average molecular weight: 3700, solid content concentration: 70% by mass, mineral spirit (manufactured by Nitto Kasei Co., Ltd.) 30% by mass)
5) Acrylic modified epoxy resin solution (manufacturing method will be described later. Epoxy equivalent: 690, weight average molecular weight: 25,000, solid content concentration: 60% by mass, mineral spirit (manufactured by Nitto Kasei Co., Ltd.) 40% by mass)
6) Coloring pigment 1 (titanium oxide, TITONERUTILE R-5N (manufactured by Sakai Chemical Co., Ltd.))
7) Coloring pigment 2 (carbon black, Raven 14 POWDER (manufactured by BILRA))
8) Coloring pigment 3 (yellow iron oxide, TAROX synthetic iron oxide HY-100 (manufactured by Titan Kogyo Co., Ltd.))
9) Rust preventive pigment 1 (aluminum metaphosphate, K-WHITE #94 (manufactured by Teika))
10) Rust preventive pigment 2 (mixture of zinc phosphate, calcium phosphite and zinc oxide, EXPERT NP-1007-D (manufactured by Toho Pigment Co., Ltd.))
11) Rust preventive pigment 3 (aluminum tripolyphosphate, ZAP-1 (Shih-Sheng))
12) Anti-sagging agent (calcium carbonate, MC-K (manufactured by Maruo Calcium Co.))
13) Leveling agent (acrylic polymer surface conditioner, BYK-350 (manufactured by Big Chemie))
14) Corrosion ion fixing agent (hydrotalcite)
15) Hydrocarbon solvent 1 (mineral spirit (manufactured by Nitto Kasei))
16) Ketone solvent (methyl isobutyl ketone (manufactured by Mitsubishi Chemical Corporation)

Here, the acrylic modified epoxy resin solution described in 5) above was manufactured according to the following procedure.
100 parts of Mineral Spirit (manufactured by Nitto Kasei Co., Ltd.) and 588 parts of "Epiclon HP-820" (trade name, manufactured by DIC Corporation, derivative of 4-t-butylcatechol and epichlorohydrin, epoxy equivalent weight 225, weight average molecular weight 450) were added to nitrogen. It was heated to 135°C under a stream of air, and a mixture of the following vinyl monomer and polymerization initiator was added dropwise over 2 hours, and aged for 1 hour after the dropwise addition (mixture of vinyl monomer and polymerization initiator: 12 parts of acrylic acid, 2-ethylhexyl A mixture of 70 parts of acrylate, 335 parts of styrene, and 13 parts of t-butylperoxy-2-ethylhexanoate). Next, 100 parts of mineral spirit, 168 parts of "Haridimer 200" (trade name, manufactured by Harima Kasei Co., Ltd., dimer acid, acid value 192) and 1.2 parts of tetrabutylammonium bromide were charged, heated to 135°C, and reacted for about 1 hour. went. Furthermore, 24 parts of salicylic acid was charged, and the reaction was carried out for about 1 hour. When the resin acid value became 1 mgKOH/g or less, mineral spirit was added to obtain an acrylic modified epoxy resin solution with a solid content concentration of 60% by mass. The obtained acrylic modified epoxy resin had an epoxy equivalent of 690 (per solid content) and a weight average molecular weight of 25,000.
Regarding the acid value of the resin, the number of mg of potassium hydroxide required to neutralize the free acid in 1 g of the resin is determined according to the method described in JIS K 5601-2-1:1999. The acid value of the solid content was determined. The weight average molecular weight was measured by size exclusion chromatography using polystyrene as a standard substance.

<2. Preparation of curing agents 1 to 4>
The raw materials listed in Table 2 were sequentially charged, and curing agents 1 to 4 were prepared by a known manufacturing method.
The raw materials listed in Table 2 are as follows.

17) Phenalkamine solution 1 (Cardolite NX2003 (manufactured by Cardolite), active hydrogen equivalent 95, solid content concentration 95% by mass)
18) Modified polyamine solution 1 (Daitoclar U6181 (manufactured by Daito Sangyo Co., Ltd.), active hydrogen equivalent 278, solid content concentration 90% by mass)
19) Modified polyamine solution 2 (Daitoclar X9553 (manufactured by Daito Sangyo Co., Ltd.), active hydrogen equivalent 74, solid content concentration 70% by mass)
20) Ketimine 1 (ADEKA Hardener EH-235R-2 (manufactured by ADEKA), active hydrogen equivalent 95, solid content concentration 100% by mass)

<3. Preparation of texture conditioners 1 to 20>
[Examples 1 to 14, Comparative Examples 1 to 6]
According to the compounding amounts shown in Tables 3 and 4, the base agent and curing agent were mixed immediately before use in coating to prepare substrate conditioners 1 to 20 (Examples 1 to 14, Comparative Examples 1 to 6) (equivalent ratio (amine/epoxy)=0.8). Furthermore, the viscosity of the main agent and curing agent was measured before mixing. The viscosity was measured using a Ford cup No. 4 according to ASTM D-1200-10 under conditions of 23° C./50% RH.

<4. Characteristic evaluation (quick drying, low temperature curing, low temperature curing at high humidity, solvent resistance test, aerosolization)>
Surface conditioners 1 to 11 were evaluated for room temperature curability, low temperature curability, low temperature curability at high humidity, and solvent resistance tests using the following methods. In addition, the discharging properties of the texture conditioners 12 to 20 when made into aerosols were evaluated. The results are shown in Tables 3 and 4.

≪Room temperature curability≫
Each of the texture conditioners 1 to 11 was applied with a brush to a steel plate having dimensions of 150 mm x 70 mm x 0.8 mm at a weight of 0.10 kg/m ² . After curing for 3 hours under conditions of 23° C./50% RH, the degree of dryness of the coating film was evaluated based on JIS K5600-1-1:1999.
○: Semi-hardened and dry after 3 hours.
×: The state is not dry to the touch even after 3 hours have passed.

≪Low temperature curability≫
Each of the texture conditioners 1 to 11 was applied with a brush to a steel plate having dimensions of 150 mm x 70 mm x 0.8 mm at a weight of 0.10 kg/m ² . After curing for 5 hours under conditions of 5° C./50% RH, the degree of dryness of the coating film was evaluated based on JIS K5600-1-1:1999.
○: Semi-hardened and dry after 5 hours.
Δ: Dry to the touch after 5 hours.
×: Even after 5 hours, the surface was not dry to the touch.

≪Low temperature curing at high humidity≫
Each of the texture conditioners 1 to 11 was applied with a brush to a steel plate having dimensions of 150 mm x 70 mm x 0.8 mm at a weight of 0.10 kg/m ² . After curing for 5 hours under conditions of 5° C./99% RH, the degree of dryness of the coating film was evaluated based on JIS K5600-1-1:1999.
◎: Hardened and dried after 5 hours.
○: Semi-hardened and dry after 5 hours.
×: Even after 5 hours, the surface was not dry to the touch.

≪Solvent resistance test 1 (strong solvent)≫
Each of the texture conditioners 1 to 11 was applied with a brush to a steel plate having dimensions of 150 mm x 70 mm x 0.8 mm at a weight of 0.10 kg/m ² . After curing for 24 hours under conditions of 23° C./50% RH, rubbing evaluation was performed in accordance with the method of ASTM D4752-03. The reagent used was xylene (manufactured by ENEOS Corporation).
〇: Condition that does not affect the surface.
△: A state in which the appearance of the coating film dissolves after rubbing.
×: After rubbing, the appearance of the paint film dissolves and the surface becomes depressed.

≪Solvent resistance test 2 (weak solvent)≫
Each of the texture conditioners 1 to 11 was applied with a brush to a steel plate having dimensions of 150 mm x 70 mm x 0.8 mm at a weight of 0.10 kg/m ² . After curing for 24 hours under conditions of 23° C./50% RH, rubbing evaluation was performed in accordance with the method of ASTM D4752-03. The reagent used was mineral spirit (manufactured by Nitto Kasei Co., Ltd.).
〇: Condition that does not affect the surface.
△: A state in which the appearance of the coating film dissolves after rubbing.
×: After rubbing, the appearance of the paint film is dissolved and the surface is depressed.

≪Aerosolization≫
An aerosol container manufactured by Air Water Sol was prepared. Dimethyl ether was used as the propellant. As shown in Table 4, 144 ml of the base agent, 16 ml of the curing agent, and 160 ml of the propellant were sealed in the above aerosol container to prepare an aerosol product (equivalent ratio (amine/epoxy) = 0.8 to 1.0).
The ejection stability of the aerosol product was evaluated. The method was to store the aerosol cans at 45°C and shake them 20 times every month to evaluate whether the agitation sound inside the can was heard and whether the liquid could be discharged without clogging. .
○: Stirring bead sounds, and by shaking sufficiently, the injection liquid can be stably discharged.
×: Even after shaking 20 times, the stirring ball did not make a sound and the injection liquid could not be stably ejected.

<5. Characteristic evaluation (impregnation on rusted surfaces, anti-corrosion properties)>
<5-1. Preparation of rust coating plate>
[Test method, evaluation]
First, a grit-blasted steel plate with dimensions of 150 mm x 70 mm x 1.6 mm was coated with JIS K5621 (general anti-rust paint) class 2 [``Green Borsei Architectural Use''] [Dainippon Paint Co., Ltd.] on half of one side (75 x 70 mm). Co., Ltd. product name]] twice, and then apply JIS K5516 (synthetic resin compound paint) class 2 intermediate coating ["Taiko Marine Intermediate Coat" [Dainippon Toyo Co., Ltd. product name]] once. Finally, a JIS K5516 (synthetic resin compound paint) class 2 top coat ["Tyko Marine Top Coat" [trade name, manufactured by Dainippon Toyo Co., Ltd.]] was applied once to obtain a test coated plate. The coating film thus formed is hereinafter referred to as the "old coating film." The obtained test coated plate was exposed outdoors for 12 months to cause rust to develop. In this way, a rust-prone coated plate was produced.

[Preprocessing]
Only the deposits and brittle rust on the surface of the rusted painted plate were removed using Scotchbrite (trade name, manufactured by 3M).

[Application of paint composition]
After the pretreatment, the surface conditioners 1 to 11 prepared immediately before use for painting were applied with a brush to a coating weight of 0.10 kg/m ² , and the coating was applied with a brush at a temperature of 23°C. A test plate was prepared by air drying for several days.

<5-2. Characteristic evaluation>
The test plates coated with the substrate conditioners 1 to 11 were evaluated for their impregnability into rusted surfaces and anticorrosion properties using the following methods. The results are shown in Table 3.

≪Impregnating into rusted surfaces≫
The prepared specimen was cut into a size of 1 cm x 1 cm, and a cross-sectional photograph and elemental distribution (carbon and iron) were measured using a scanning electron microscope (SU-70 manufactured by Hitachi High-Technologies) to determine the penetration into the rust layer. was evaluated based on the following criteria.
〇: Resin content (carbon) is confirmed deep into the cracks in the rust layer. ×: Resin content (carbon) does not enter into the cracks in the rust layer.

≪Corrosion resistance≫
Corrosion resistance of the produced test specimen was evaluated based on cycle corrosion of JIS K 5674:2019 (number of cycles: 36).
◎: No blisters or rust ○: There are blisters less than 2 mm wide or rust on the cross-cut parts Or, there are some blisters or rust spots on areas other than the cross-cut parts △: There are blisters or rust 2-5 mm wide on the cross-cut parts There is rust, or there is a bulge of 10% or less outside the cross-cut area, or there is rust ×: There is a bulge that exceeds 5 mm in width or there is rust on the cross-cut area, or there is a bulge that exceeds 10% or there is rust outside the cross-cut area

Claims (3)

A base resin containing an epoxy resin (a) having a weight average molecular weight of 5,000 to 20,000 and an epoxy equivalent of 500 to 900 g/eq, and a curing agent containing a compound (b) that reacts with the epoxy group of the epoxy resin. A two-component conditioner,
At least one of the base agent or the curing agent contains a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon,
The base agent is a two-component base conditioner characterized in that the viscosity of Ford Cup No. 4 at a temperature of 23° C. is 10 to 27 seconds. The two-component base conditioner according to claim 1, wherein the compound (b) that reacts with the epoxy group contains at least ketimine and phenalkamine. A two-component type comprising a main resin containing an epoxy resin (a) having a weight average molecular weight of 5000 to 20000 and an epoxy equivalent of 500 to 900 g/eq, and a curing agent containing a compound (b) that reacts with the epoxy group. Containing a substrate conditioner and a propellant (e),
At least one of the base agent or the curing agent contains a corrosive ion fixing agent (c) and a solvent (d) containing an aliphatic hydrocarbon,
The aerosol base conditioner is characterized in that the base agent has a Ford Cup No. 4 viscosity of 10 to 27 seconds at a temperature of 23°C.