Curable composition and its uses

Abstract

To provide a curable composition capable of forming a cured product that has excellent water repellency and also enables snow or ice on its surface to easily drop therefrom, and applications thereof.SOLUTION: A curable composition contains a silicone-based resin component (A), a reactive silicone-based oil component (B) having at least one reactive group. The silicone-based resin component (A) is substantially free of a D unit. A content of the reactive silicone-based oil component (B) is 0.03-10 pts.mass relative to 100 pts.mass of the silicone-based resin component (A).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a curable composition capable of forming a cured product that is not only water-repellent but also has excellent snow and ice shedding properties (the property of snow and ice adhering to the surface easily falling off the cured film surface), and uses thereof. [Background technology]

[0002] In cold regions with heavy snowfall (such as areas with heavy snowfall), there is a risk of infrastructure being damaged or reduced in functionality due to snow damage, so snow removal work is carried out to ensure a safe and comfortable living environment. However, snow removal requires a great deal of effort, and when the snow is wet (wet snow that contains a lot of water), it is very heavy and the work becomes even more difficult and dangerous. For this reason, there are cases where frequent snow removal is difficult, such as in areas with limited manpower, or when there are many outdoor structures to be removed or they are located in dangerous locations.

[0003] Another problem is that snow builds up on road signs, guide signs, traffic signals (signal lamps), etc., making them difficult to remove, reducing their visibility. For example, in recent years, LED traffic lights, which use light-emitting diodes (LEDs) as their light source, have become increasingly popular. However, while they are excellent at saving energy, they generate less heat than traditional incandescent lights, making them prone to the phenomenon known as "white lights," in which the display on the traffic light is obscured by snow.

[0004] Therefore, there is a demand for technology that can prevent snow and ice from adhering to substrate surfaces (solid surfaces) and improve the ability of snow and ice to fall off naturally.

[0005] Japanese Patent Laid-Open Publication No. 2-147688 (Patent Document 1) discloses an anti-icing composition that has an anti-icing effect. In the examples of Patent Document 1, the anti-icing effect is confirmed by measuring the ice shear fracture strength by applying force to ice adhered to the surface of a test object to peel it off, but there is no mention of the property of the composition falling off naturally without the application of force.

[0006] It is known that anti-icing properties (the property of preventing snow and ice from adhering to a solid surface) are significantly different from snow and ice shedding properties (the property of making it easy for snow and ice that has adhered to a solid surface to fall off). On page 96 of "Wettability of Solid Surfaces: From Superhydrophilicity to Superhydrophobicity (Kyoritsu Shuppan)" (Non-Patent Document 1), it is stated that "a surface that snow does not easily adhere to is not necessarily a surface that snow easily sheds off." It also states that "snow adhesion and snow shedding properties are not necessarily governed by the same factors, and vary greatly depending on the surface properties (water repellency, hydrophilicity) and the properties of the snow (wet snow or dry snow)."

[0007] Furthermore, International Publication No. 2019 / 039468 (Patent Document 2) discloses a curable composition capable of forming a cured product that can maintain anti-fouling or protective functions for a long period of time, and describes water repellency and a function that promotes snow and ice removal (snow and ice removal properties) as examples of the anti-fouling or protective functions. However, even with the curable composition of Patent Document 2, the snow and ice removal properties were sometimes insufficient. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 2-147688 [Patent Document 2] International Publication No. 2019 / 039468 [Non-patent literature]

[0009] [Non-Patent Document 1] Chemistry Essentials Series 12: Wettability of Solid Surfaces: From Superhydrophilic to Superhydrophobic (Publisher: Kyoritsu Shuppan Co., Ltd., December 10, 2014) Summary of the Invention [Problem to be solved by the invention]

[0010] Furthermore, many paints for snow damage prevention are colored even when they are supposed to be transparent, making it difficult to achieve a high level of both snow and ice removal and visibility of the underlying surface.

[0011] Therefore, an object of the present invention is to provide a curable composition capable of forming a cured product that not only has excellent water repellency but also has good snow and ice removal properties, and uses thereof.

[0012] Another object of the present invention is to provide a curable composition capable of forming a cured product having excellent water repellency, snow and ice shedding properties, and water sliding properties, and uses thereof.

[0013] It is still another object of the present invention to provide a curable composition which can form a cured product having excellent water repellency, snow and ice shedding properties, water sliding properties and appearance, and which also has excellent workability (applicability or coating ability), and uses thereof.

[0014] Another object of the present invention is to provide a curable composition capable of forming a cured product having excellent durability (weather resistance or light resistance), and uses thereof.

[0015] Yet another object of the present invention is to provide a curable composition that can form a cured product that has good workability (applicability or coatability) and excellent visibility (transparency) of the substrate even when applied (or coated) to various substrates, and uses thereof. [Means for solving the problem]

[0016] As a result of extensive research to achieve the above object, the present inventors have found that when a curable composition is prepared containing a silicone resin component that is substantially free of D units and a specific reactive silicone oil component that has a reactive group in a specific ratio, the cured product obtained by curing not only exhibits high water repellency but also has excellent snow and ice removal properties, and have completed the present invention.

[0017] That is, the curable composition (coating composition or paint composition) of the present invention is a curable composition comprising a silicone-based resin component (A) and a reactive silicone-based oil component (B) having at least one reactive group, the silicone-based resin component (A) is substantially free of D units as siloxane units, The proportion of the reactive silicone oil component (B) is 0.03 to 10 parts by mass relative to 100 parts by mass of the silicone resin component (A).

[0018] The reactive silicone oil component (B) preferably has the reactive group at only one molecular end, and is preferably a silicone oil in which one molecular end is modified with a hydroxyl group (silanol group) directly bonded to a silicon atom and / or an alkoxy group (alkoxysilyl group) directly bonded to a silicon atom.Furthermore, the reactive silicone oil component (B) is preferably a reactive silicone oil in which, when a dried product (dried film or coating) is produced on a smooth substrate using a composition prepared under the following condition (i), the surface of the dried product satisfies the following conditions (ii) and (iii):

[0019] (i) A composition consisting of 1 part by mass of a reactive silicone oil component (B) and 99 parts by mass of an isoparaffin solvent (ii) The water contact angle of a 3 μL drop of water is 90° or more (e.g., 90 to 120°). (iii) The water sliding angle of a 50 μL drop is 25° or less (e.g., 1 to 25°).

[0020] The curable composition may further contain a curing catalyst (C), and the proportion of the curing catalyst (C) may be 0.05 parts by mass or more but less than 20 parts by mass, preferably about 0.1 to 19 parts by mass (e.g., 1 to 18.5 parts by mass), relative to 100 parts by mass of the silicone-based resin component (A). The curable composition may further contain a curing catalyst (C) and a solvent (D), and the total proportion of the silicone-based resin component (A), the reactive silicone-based oil component (B), and the curing catalyst (C) may be 9.5% by mass or more relative to the entire curable composition. The curable composition may also be a coating composition for promoting snow and ice removal. The curable composition may be cured to form a cured product. When snow is adhered to the surface of the resulting cured product and the temperature is raised from -15°C to 8 to 10°C over 30 minutes, the time it takes for the snow to fall off is shorter than the time it takes for snow adhered to an untreated substrate, such as an A5052 aluminum alloy plate, to fall off.

[0021] The present invention encompasses a cured product of the curable composition, as well as a method for producing the cured product by coating the surface of a substrate with the curable composition and curing the resulting coating film.

[0022] The present invention also encompasses a composite comprising a substrate and a cured film formed from the cured product, the cured film covering the surface of the substrate. The substrate may form at least a portion of an outdoor structure. The outdoor structure may be a road sign, a guide sign, a signboard, an electronic bulletin board, a traffic light, a street lamp, or a lighthouse.

[0023] Furthermore, the present invention also encompasses a method for accelerating snow and ice shedding on the surface of the substrate, by coating the surface of the substrate with the curable composition to form a cured film.

[0024] In this specification and claims, the term "siloxane unit" refers to a structural unit (a unit constituting the interior or end of the polysiloxane skeleton) corresponding to one silicon atom that forms a polysiloxane [silicone or organopolysiloxane (siloxane resin or siloxane oligomer)], i.e., a basic unit selected from M units, D units, T units, and Q units.

[0025] In addition, in this specification and claims, "A5052 aluminum alloy plate" refers to a plate made of an A5052 aluminum alloy conforming to JIS H 4000. [Effects of the Invention]

[0026] The curable composition (coating composition or paint composition) of the present invention contains a silicone-based resin component (A) substantially free of D units and a specific reactive silicone-based oil component (B) having reactive groups in a specific ratio. This allows the formation of cured products that not only exhibit high water repellency but also have excellent snow and ice shedding properties. It can also form cured products that are excellent in water repellency, snow and ice shedding properties, and water sliding properties. Furthermore, even when a silicone-based component with low surface energy (or low surface tension) is included as a component for improving water repellency, it can effectively suppress cissing (dents or pinholes) and provide excellent workability (applicability or paintability). It can also form cured products with excellent durability (weather resistance or light resistance). Furthermore, even when applied (or coated) to various substrates, the cured product is unlikely to impair the visibility of the underlying surface due to factors such as dullness (white blur), cracks, or cissing (dents or pinholes), and a cured product with excellent transparency can be formed, making it suitable for use on substrates (or components) where visibility is required. DETAILED DESCRIPTION OF THE INVENTION

[0027] [Curable composition (coating composition or paint composition)] The curable composition of the present invention contains at least a specific silicone-based resin component (A) and a specific reactive silicone-based oil component (B). By containing these components in specific proportions, the curable composition can form a cured product (particularly a cured film) that adheres firmly to a substrate (such as a molded body or an outdoor structure) and has excellent water repellency and snow / ice shedding properties. Furthermore, in outdoor applications, exposure to light, heat, water, snow, etc. can usually result in a decrease in durability (weather resistance or light resistance) due to the silicone-based oil component being detached from the coating film. However, the curable composition of the present invention can form a cured product (cured film or coating film) with excellent durability.

[0028] (A) Silicone resin component The silicone-based resin component (A) is a component that forms a siloxane matrix in the cured product, i.e., a resin component (silicone-based resin or silicone-based oligomer component) whose main constituent unit is a siloxane unit. The proportion of siloxane units to all constituent units in the silicone-based resin component (A) is approximately 100 mass %, and the silicone-based resin component (A) is substantially free of constituent units other than siloxane units.

[0029] The siloxane unit is the M unit [R M 3SiO 1 / 2 ](where R M are independently hydrogen atoms or organic groups.), D units [R D 2SiO 2 / 2 ](where R D are independently hydrogen atoms or organic groups.), T units [R T SiO 3 / 2 ](where R T represents a hydrogen atom or an organic group.) and Q units [SiO 4 / 2 ] are some examples.

[0030] R M , R D , R T The organic group represented by the formula (I) is preferably, for example, a hydrocarbon group (non-reactive organic group) which may have a substituent.

[0031] Examples of hydrocarbon groups that form the organic group include alkyl groups, aryl groups, etc. Examples of alkyl groups include C groups such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, and n-hexyl group. 1-6 Examples of the aryl group include C phenyl, methylphenyl (tolyl), dimethylphenyl (xylyl), and naphthyl groups. 6-20 Examples include an aryl group.

[0032] Examples of the substituent that may be contained in the hydrocarbon group forming the organic group include halogen atoms such as fluorine atoms, etc. Therefore, the hydrocarbon group having a substituent may be, for example, a fluorinated hydrocarbon group (e.g., a fluorinated alkyl group such as a 3,3,3-trifluoropropyl group).

[0033] base R M , R D , R T is preferably an organic group, and particularly preferably a hydrocarbon group which may have a substituent (for example, an alkyl group such as a methyl group, an aryl group such as a phenyl group, or a fluorinated alkyl group such as a 3,3,3-trifluoropropyl group, preferably an alkyl group or an aryl group), and more preferably C 1-3 Alkyl groups such as alkyl groups, especially C 1-2 An alkyl group (particularly a methyl group) is preferred.

[0034] In addition, in the M unit and D unit, three R in the same unit M , two R D The types of R may be the same or different from each other. When two or more M units are contained, the R M may be the same or different, and when two or more D units are contained, R D The types of R may be the same or different from each other, and when two or more T units are contained, R TThe types may be the same or different from each other.

[0035] The silicone resin component (A) may contain these siloxane units either alone or in combination of two or more.

[0036] The silicone resin component (A) has T units and / or Q units as main structural units in order to form a branched or three-dimensional network-like cured product (cured film, coating film, etc.). In particular, T units (especially R T It appears that a high proportion of T units (particularly R units, each of which is an alkyl group such as a methyl group) can effectively improve snow and ice shedding properties and water slippage. T The proportion of T units (T units in which each T unit is an alkyl group such as a methyl group) relative to all siloxane units in the silicone resin component (A) may be, for example, 50 mol % or more (e.g., 60 to 100 mol %), preferably 70 mol % or more (e.g., 80 mol % or more), and more preferably 90 mol % or more (e.g., 95 to 100 mol %), and it is particularly preferable that the silicone resin component (A) is composed essentially of T units alone.

[0037] In addition, in the silicone resin component (A), the D unit (particularly two R D When the proportion of D units in which both R are alkyl groups such as methyl groups is too high, snow and ice shedding properties and water slippage are likely to decrease. Therefore, the silicone resin component (A) may contain D units to the extent that the effects of the present invention are not impaired. However, the D units (particularly two R D and D units in which both are alkyl groups such as methyl groups) may be, for example, 5 mol % or less (e.g., 0 to 3 mol %), more preferably about 1 mol % or less (e.g., 0 to 0.5 mol %), and it is particularly preferable that the copolymer is substantially free of D units (0 mol %).

[0038] Examples of the silicone resin component (silicone resin or silicone oligomer) (A) include various corresponding compounds having an alkoxy group at at least one end (one end or both ends) of the molecule, and these may be linear or branched. That is, in order to form a cured product through a curing reaction (condensation reaction, hydrolysis reaction, condensation reaction, etc.) caused by heat and / or moisture, the silicone resin component (A) has a hydrolyzable group such as a hydroxyl group (silanol group) directly bonded to a silicon atom and / or an alkoxy group (alkoxysilyl group) directly bonded to a silicon atom at the molecular end, and the presence of an alkoxy group (alkoxysilyl group) is preferred because it allows for moisture curing.

[0039] Examples of the alkoxy group directly bonded to a silicon atom include C groups such as a methoxy group and an ethoxy group. 1-6 These alkoxy groups can be used alone or in combination of two or more. Among these, C alkoxy groups such as methoxy and ethoxy groups are preferred. 1-3 Alkoxy groups are preferred, and C 1-2 Alkoxy groups are more preferred, and methoxy groups are most preferred.

[0040] The silicone resin component (A) may be a silicone resin, but is preferably a silicone oligomer (siloxane oligomer) because it can be moisture-cured at room temperature (no heat treatment is required for curing) and can be used (applied) in places where open flames are strictly prohibited. Generally, there is no clear distinction between silicone resins and silicone oligomers, but silicone oligomer means a dimer to a relatively low molecular weight polymer (low molecular weight silicone resin). Therefore, in the present specification and claims, the molecular weight (or weight average molecular weight) of the silicone oligomer can be selected, for example, from a range of about 200 to 10,000, with the upper limit being, for example, about 8,000 or less (e.g., about 7,000 or less), preferably about 6,000 or less (e.g., about 5,000 or less), or about 4,000 or less (e.g., about 3,000 or less), or about 2,000 or less (e.g., about 1,000 or less), and the lower limit being, for example, about 300 or more (e.g., about 400 or more), preferably about 500 or more. Furthermore, the molecular weight (or number average molecular weight) of the silicone oligomer can be selected, for example, from a range of about 200 to 5,000, with the upper limit being about 4,000 or less (e.g., about 3,000 or less), or about 2,000 or less (e.g., about 1,000 or less), and the lower limit being about 300 or more (e.g., about 400 or more), preferably about 500 or more. The weight average molecular weight and number average molecular weight may be measured by gel permeation chromatography (GPC) (converted to standard polystyrene).

[0041] The silicone resin component (A) may be one that cures at room temperature through crosslinking of alkoxysilyl groups in the presence of the curing catalyst (C) described below, or may be a compound represented by the following average composition formula:

[0042] R 1 a Si(OR 2 ) b O (4-a-b) / 2 (In the formula, R 1 and R 2are independently an alkyl group or an aryl group, a is an average value in the range of 0.4 to 1.7, and b is the OR group in the silicone resin component (A). 2 The ratio of the total to the total weight of the alloy is 5% by mass or more.

[0043] The kinematic viscosity of the silicone resin component (A) at 25°C is, for example, 0.1 to 200 mm 2 The upper limit is 120 mm / s. 2 / s or less, preferably 100 mm 2 / s or less, the lower limit is 0.5 mm 2 / s or more (e.g., 20 mm 2 / s or more).

[0044] Specific examples of the silicone resin component (A) include methyl-based silicone alkoxy oligomers, methylphenyl-based silicone alkoxy oligomers, etc. Of these, methyl-based silicone alkoxy oligomers are preferred.

[0045] Examples of methyl-based silicone alkoxy oligomers include methyl-based silicone methoxy oligomers produced from methyltrimethoxysilane.

[0046] The silicone resin component (A) may be a commercially available product, such as KC-89S, KR-515, KR-400, KR-500, or X-40-9225 (all manufactured by Shin-Etsu Chemical Co., Ltd.), or US-CF-2403 or SR2402 (all manufactured by Dow Corning Toray Co., Ltd.). These silicone resin components (A) may be used alone or in combination of two or more.

[0047] The silicone resin component (A) may contain a silicone resin component having D units within a range that does not impair the effects of the present invention, and may contain, for example, X-40-9246 or X-40-9250 (both manufactured by Shin-Etsu Chemical Co., Ltd.), but it is preferable that it does not contain such a component.

[0048] The proportion of the silicone-based resin component (A) is not particularly limited, but may be selected from a range of, for example, about 1 to 90% by mass of the entire curable composition, with the lower limit being, for example, 10% by mass or more (e.g., 20% by mass or more), preferably 30% by mass or more, and more preferably 35% by mass or more, and the upper limit being, for example, 70% by mass or less, preferably 60% by mass or less, and more preferably 50% by mass or less (e.g., 45% by mass or less). If the proportion of the silicone-based resin component (A) is too low, depending on the substrate to which it is applied, repelling or dulling (whitening or dullness) may occur easily during application, and the visibility of the base may be reduced. Conversely, if the proportion is too high, workability (applicability, coatability) may be reduced, leading to poor appearance of the cured product (for example, paint marks may remain depending on the application method, such as with a sponge or brush, reducing the visibility of the base).

[0049] (B) Reactive silicone oil component The reactive silicone oil component (modified silicone oil component, reactive silicone additive, or reactive silicone modifier) ​​(B) is a component that imparts the necessary water repellency, water slippage, snow and ice shedding properties, etc. to the cured product, and has a repeating structure of siloxane units (polysiloxane skeleton), which may contain M units, T units, Q units, etc. as necessary, but preferably has a chain (particularly linear) structure formed mainly of D units.

[0050] The siloxane units (M units, D units, T units, Q units) of the reactive silicone oil component (B) include the same units as those exemplified in the section on the silicone resin component (A). These siloxane units may be contained either alone or in combination of two or more.

[0051] In the siloxane unit of the reactive silicone oil component (B), the group R M , R D , R Tis preferably an organic group, and particularly preferably a hydrocarbon group which may have a substituent (for example, an alkyl group such as a methyl group, an aryl group such as a phenyl group, or a fluorinated alkyl group such as a 3,3,3-trifluoropropyl group, preferably an alkyl group or an aryl group), and more preferably C 1-3 Alkyl groups such as alkyl groups, especially C 1-2 An alkyl group (particularly a methyl group) is preferred.

[0052] In addition, in the M unit and D unit, three R in the same unit M , two R D The types of R may be the same or different from each other. When two or more M units are contained, the R M may be the same or different, and when two or more D units are contained, R D The types of R may be the same or different from each other, and when two or more T units are contained, R T The types may be the same or different from each other.

[0053] The D unit in the reactive silicone oil component (B) can be, for example, R D may both contain predominantly D units which are alkyl groups such as methyl groups.

[0054] The reactive silicone oil component (B) of the present invention is sufficient as long as it has at least one reactive group, and is preferably a compound having a reactive group (modified group) at only one molecular end (particularly a siloxane unit at one molecular end), i.e., a single-end-modified silicone oil component, because it is easy to improve snow and ice shedding properties. If an unmodified (straight silicone oil) is combined with the silicone resin component (A), snow and ice shedding properties, water slippage, durability, etc. may be reduced.

[0055] The type of reactive group (modifying group) is not particularly limited, and may be a hydroxyl group (or a hydroxyl group-containing group) directly bonded to a carbon atom, but hydrolyzable groups such as a hydroxyl group (silanol group) directly bonded to a silicon atom or an alkoxy group (alkoxysilyl group) directly bonded to a silicon atom are preferred, as they are more likely to be oriented on the surface of the cured product by the curing reaction and can further improve durability (weather resistance or light resistance), and those having an alkoxy group (alkoxysilyl group) directly bonded to a silicon atom are even more preferred (i.e., silicone oils that are alkoxy-modified at one end are even more preferred).

[0056] The alkoxy group directly bonded to the silicon atom is preferably a C alkoxy group such as a methoxy group or an ethoxy group. 1-2 An alkoxy group is preferred, and a methoxy group is more preferred. The number of reactive groups in one molecule of the reactive silicone oil component (B) is not particularly limited, and when there are two or more reactive groups, the types of the reactive groups may be the same or different.

[0057] The kinematic viscosity of reactive silicone oil component (B) at 25°C (unit: mm 2 The kinematic viscosity (kinematic viscosity / s) may be selected from the range of, for example, about 5 to 1000 (e.g., 10 to 800, preferably 15 to 100). The lower limit may be, for example, about 20 or more (e.g., 30 or more), preferably 40 or more, and more preferably 50 or more (e.g., 80 or more). The upper limit may be, for example, about 500 or less (e.g., 300 or less), preferably 200 or less (e.g., 150 or less), and more preferably 100 or less (e.g., 80 or less). If the kinematic viscosity is too high, it may be difficult to prepare the curable composition, or even if it is prepared, it may be difficult to apply during coating or may cause cissing, resulting in reduced workability (applicability and coating properties). In this specification and claims, kinematic viscosity can be measured in accordance with JIS Z 8803:2011 (Measurement of Viscosity of Liquids - Viscosity Measurement Method Using a Capillary Viscometer).

[0058] The reactive silicone oil (B) is preferably a reactive silicone oil such that, when a dried product (or coating film) is produced on a smooth substrate, such as a polycarbonate resin substrate (in accordance with JIS K 6735), using a composition (diluted solution) prepared under the following condition (i), the surface of the dried product satisfies the following conditions (ii) and (iii):

[0059] (i) A composition (diluted solution) consisting of 1 part by mass of a reactive silicone oil component (B) and 99 parts by mass of an isoparaffin solvent (ii) The water contact angle of 3 μL of water is 90° or more. (iii) The water slide angle of 50 μL of water is 25° or less

[0060] The isoparaffinic solvent in the composition (i) (diluted solution) may be an isoparaffinic solvent exemplified as solvent (D) described later, and preferably has CAS Registry Number 64741-66-8.

[0061] The dried product of the composition (diluted solution) of (i) is obtained by applying the composition described in the condition (i) to a smooth substrate such as a polycarbonate resin substrate (compliant with JIS K 6735) in an amount of 10 g / m before drying. 2 The composition can be prepared by applying the composition by a conventional application method, for example, using a sponge, so that the composition has a thickness of about 100 μm, and then drying the composition at room temperature (23°C) and in an atmosphere with a humidity of 50% RH for about 24 hours. Specifically, the composition can be prepared by the method described in the Examples below.

[0062] The water contact angle (ii) of the dried product (or coating film) obtained in (i) above may be, for example, 90° or more, preferably about 90 to 120°, with the lower limit being more preferably 95° or more, even more preferably 100° or more, and the upper limit being more preferably 110° or less, even more preferably about 105° or less. If the water contact angle (ii) is too small, the water repellency and snow and ice shedding properties of the cured product may be reduced.

[0063] In this specification and claims, the water contact angle (ii) can be measured by a conventional method, and the amount of water dropped for measurement is preferably 3 μL. Specifically, the measurement is performed in accordance with the method described in the water repellency test in the Examples section below.

[0064] The water sliding angle (iii) of the dried product obtained in (i) may be, for example, about 30° or less (e.g., 0 to 25° (or more than 0° but not more than 25°)), with the upper limit preferably being 25° or less (e.g., 23° or less), and more preferably 20° or less, and the lower limit being the lower, the better, from the viewpoint of effectively improving the water sliding property and snow and ice shedding property of the cured product, and may be, for example, 1° or more (e.g., 10° or more), or 15° or more (e.g., 17° or more). If the water sliding angle (iii) is too large, the water sliding property and snow and ice shedding property of the cured product may be reduced.

[0065] In this specification and claims, the water sliding angle (iii) can be measured by a conventional method, and the amount of water dropped for measurement is preferably 50 μL. Specifically, the measurement is performed in accordance with the method described in the water sliding test in the Examples below.

[0066] The silicone oil component (B) may be a commercially available product, such as X-22-170BX (one-terminal carbinol-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), X-22-170DX (one-terminal carbinol-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), X-22-176DX (one-terminal diol-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), X-22-176F (one-terminal diol-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), X-22-176GX-A (one-terminal diol-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), KR-4000A (one-terminal alkoxy-modified, manufactured by Shin-Etsu Chemical Co., Ltd.), or KP-983 (one-terminal alkoxy-modified, manufactured by Shin-Etsu Chemical Co., Ltd.). These reactive silicone oil components (B) may be used alone or in combination.

[0067] The proportion of the reactive silicone oil component (B) relative to 100 parts by mass of the silicone resin component (A) may be, for example, about 0.03 to 10 parts by mass (e.g., 0.05 to 1.5 parts by mass), and the lower limit is, for example, 0.05 parts by mass or more, preferably 0.1 parts by mass or more, more preferably 0.15 parts by mass or more, particularly preferably 0.25 parts by mass or more (e.g., 0.3 parts by mass or more), and most preferably 0.35 parts by mass or more (e.g., 0.4 parts by mass or more). The upper limit is, for example, 10 parts by mass or less (e.g., 5 parts by mass or less), preferably 2 parts by mass or less (e.g., less than 2 parts by mass), more preferably 1.5 parts by mass or less (e.g., 1.2 parts by mass or less), particularly preferably 1 part by mass or less (e.g., 0.8 parts by mass or less), and most preferably 0.7 parts by mass or less (e.g., 0.6 parts by mass or less, preferably 0.55 parts by mass or less, and particularly preferably 0.5 parts by mass or less). If the proportion of reactive silicone oil component (B) is too high, repelling is likely to occur during application (depending on the application method, etc.), reducing workability (applicability, paintability) and there is a risk of poor appearance such as dents (or unevenness) or pinholes. Conversely, if the proportion of reactive silicone oil component (B) is too low, there is a risk of reduced water sliding properties and snow and ice shedding, especially water sliding properties.

[0068] (C) Curing catalyst The curable composition does not necessarily contain a curing catalyst (C), but preferably contains at least one. The curing catalyst (C) is not particularly limited as long as it is a catalyst that can promote room temperature curing (moisture curing) of the curable composition, and may be a curing catalyst that reacts with moisture in the air to hydrolyze to generate an active [metal atom-OH], and then causes a condensation reaction (dehydration or dealcoholization condensation, etc.) between the [metal atom-OH] and the silicone-based resin component (A) or the reactive silicone-based oil component (B) to generate a bond [metal atom-O-Si] and promote the formation of a siloxane bond [Si-O-Si].

[0069] Examples of the curing catalyst (C) include metal alkoxides, metal chelate compounds, and metal carboxylates.

[0070] Examples of metal alkoxides include titanium alkoxides [titanium tri-C such as titanium tributoxide]. 1-8 Alkoxides; titanium tetra C such as titanium tetramethoxide, titanium tetraethoxide, titanium tetra n-propoxide, titanium tetraisopropoxide, titanium tetra n-butoxide, titanium tetraisobutoxide, titanium tetrapentoxide, titanium tetrahexoxide, and titanium tetra(2-ethylhexoxide). 1-8 alkoxides, etc.], aluminum alkoxides (aluminum triethoxide, aluminum tri-n-propoxide, aluminum triisopropoxide, aluminum tri-s-butoxide, aluminum tri-n-butoxide, etc.), aluminum tri-C 1-8 alkoxides), zirconium alkoxides (zirconium tetra C such as zirconium tetra n-butoxide and zirconium tetra n-propoxide) 1-8 Alkoxides, etc.), germanium alkoxides (germanium tetraethoxide, etc.) 1-8 alkoxides), tin alkoxides (tin tetra C such as tin tetra n-butoxide and tin tetra t-butoxide) 1-8 alkoxides), hafnium alkoxides (hafnium tetra C such as hafnium tetra 2-propoxide and hafnium tetra t-butoxide) 1-8 alkoxides), niobium alkoxides (niobium penta C such as niobium pentaethoxide) 1-8 alkoxides), tantalum alkoxides (tantalum penta C such as tantalum penta n-butoxide and tantalum pentaethoxide) 1-8 These metal alkoxides can be used alone or in combination of two or more.

[0071] Among these, titanium alkoxides and aluminum alkoxides are preferred, and titanium tetraalkoxides and aluminum trialkoxides are more preferred. The reactivity of the multiple alkoxide groups in the metal alkoxides varies depending on the number of carbon atoms and whether or not they are branched. On the other hand, if hydrolysis proceeds too quickly, stability (or workability) may decrease. Therefore, taking reactivity and stability into consideration, titanium tetraalkoxides such as titanium tetraethoxide, titanium tetraisopropoxide, titanium tetraisobutoxide, and titanium tetra-n-butoxide are preferred among the titanium tetraalkoxides. 2-4 Alkoxides are particularly preferred, and among aluminum trialkoxides, aluminum tri C such as aluminum triethoxide, aluminum triisopropoxide, and aluminum tri-s-butoxide are preferred. 2-4 Alkoxides are particularly preferred.

[0072] The metal alkoxide may be a commercially available product, for example, D-25 (titanium tetra-n-butoxide, manufactured by Shin-Etsu Chemical Co., Ltd.).

[0073] Examples of the metal chelate compound include metal chelate compounds in which a ligand such as β-diketone, phosphate ester, or alkanolamine is coordinated to a metal.

[0074] Examples of β-diketones include C diketones such as 2,4-pentanedione, 2,4-hexanedione, 3,5-heptanedione, 2,4-octanedione, 2,4-decanedione, and 2,4-tridecanedione. 3-18 Alkanediones: C such as 5,5-dimethyl-2,4-hexanedione, 2,2-dimethyl-3,5-nonanedione, and 2,2,6,6-tetramethyl-3,5-heptanedione 1-3 Alkyl C 3-18 Alkanediones; aryl C such as 1,3-diphenyl-1,3-propanedione 3-18 Alkanediones; cycloalkanediones such as 1,3-cyclopentanedione and 1,3-cyclohexanedione; acetoacetates such as methyl acetoacetate and ethyl acetoacetate. 1-3alkyl; aryl acetoacetates such as phenyl acetoacetate; and the like.

[0075] Examples of the phosphate ester include alkyl phosphate esters such as 2-ethylhexyl phosphate.

[0076] Examples of alkanolamines include monoethanolamine, diethanolamine, and triethanolamine.

[0077] These ligands can be used alone or in combination. Among these, β-diketones are preferred, and C ketones such as 2,4-pentanedione are also preferred. 3-12 Alkanediones are particularly preferred.

[0078] The central metal (metal atom) forming the metal chelate compound is not particularly limited, and examples thereof include aluminum, titanium, zirconium, niobium, magnesium, calcium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, palladium, indium, and tin. These metals can be used alone or in combination. Among these, aluminum, titanium, and zirconium are preferred.

[0079] Specific examples of metal chelate compounds include aluminum chelate compounds [e.g., tris(2,4-pentanedionato)aluminum, tris(ethylacetoacetato)aluminum, bis(ethylacetoacetato)(2,4-pentanedionato)aluminum, etc.], titanium chelate compounds [e.g., tetrakis(2,4-pentanedionato)titanium, tetrakis(ethylacetoacetato)titanium, etc.], zirconium chelate compounds [e.g., tetrakis(2,4-pentanedionato) nato)zirconium, tetrakis(ethylacetoacetato)zirconium, etc.], niobium chelate compounds [e.g., tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionatoniobium(IV) etc.], magnesium chelate compounds [e.g., diaquabis(2,4-pentanedionato)magnesium, etc.], calcium chelate compounds [e.g., diaquabis(2,4-pentanedionato)calcium, etc.], chromium chelate compounds [e.g., tris(2,4-pentanedionato) ) chromium, etc.], manganese chelate compounds [e.g., diaquabis(2,4-pentanedionato)manganese, etc.], iron chelate compounds [e.g., tris(2,4-pentanedionato)iron, etc.], cobalt chelate compounds [e.g., tris(2,4-pentanedionato)cobalt, etc.], nickel chelate compounds [e.g., bis(2,4-pentanedionato)nickel, etc.], copper chelate compounds [e.g., bis(2,4-pentanedionato)copper, etc.], zinc chelate compounds [e.g., bis(2 ,4-pentanedionato)zinc, etc.], gallium chelate compounds [tris(2,4-pentanedionato)gallium, etc.], palladium chelate compounds [e.g., bis(2,4-pentanedionato)palladium, etc.], indium chelate compounds [e.g., tris(2,4-pentanedionato)indium, etc.], tin chelate compounds [e.g., bis(2,4-pentanedionato)tin, etc.]. These metal chelate compounds can be used alone or in combination of two or more.

[0080] Among these, aluminum chelate compounds [e.g., tris(2,4-pentanedionato)aluminum, etc.] 3-8Alkanedionatoaluminum compounds, etc.], titanium chelate compounds [e.g., tetrakis(2,4-pentanedionato)titanium compounds, etc.] 3-8 titanium alkanedionate, etc.], zirconium chelate compounds [e.g., tetrakis(2,4-pentanedionato)zirconium, etc. 3-8 Alkanedionatozirconium compounds are preferred, and aluminum chelate compounds [Tris C] are preferred because they can maintain excellent durability (strength) in the cured film. 3-6 titanium chelate compounds [tetrakis(2,4-pentanedionato)titanium, etc.], 3-6 Alkanedionatotitanium etc. are more preferred.

[0081] The metal chelate compound may be a commercially available product, for example, Orgatix TC-401 (a 2-propanol-containing solution of 65% by mass of tetrakis(2,4-pentanedionato)titanium, manufactured by Matsumoto Fine Chemical Co., Ltd.).

[0082] The metal chelate compound may be an alkoxy group-containing metal chelate compound having an alkoxy group in addition to the ligand. Examples of the alkoxy group include C alkoxy groups such as methoxy, ethoxy, n-propoxy, 2-propoxy, n-butoxy, 2-butoxy, and 2-ethylhexyloxy groups. 1-12 These alkoxy groups can be used alone or in combination of two or more. Among these alkoxy groups, C alkoxy groups such as 2-propoxy groups are preferred. 1-4 An alkoxy group is preferred. Examples of the alkoxy group-containing metal chelate compound include alkoxy group-containing aluminum chelate compounds such as aluminum ethyl acetoacetato diisopropylate and aluminum ethyl acetoacetato dibutoxide, and alkoxy group-containing titanium chelate compounds such as bis(2,4-pentanedionato)bis(2-propanolato)titanium.

[0083] In the metal carboxylate (metal carboxylate), examples of the carboxylic acid include linear C carboxylic acids such as ethanoic acid (acetic acid), propanoic acid (propionic acid), butanoic acid (butyric acid), pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, and tetradecanoic acid. 2-18 Aliphatic carboxylic acids; branched chain C such as 2-methylbutanoic acid, 2-methylpentanoic acid, 2-ethylhexanoic acid, 2-methylheptanoic acid, 4-methyloctanoic acid, and 3,5,5-trimethylhexanoic acid 4-18 Aliphatic carboxylic acids and alicyclic carboxylic acids such as naphthenic acid are examples of such carboxylic acids. These carboxylic acids can be used alone or in combination. Among these, branched chain aliphatic carboxylic acids are preferred, and branched chain C carboxylic acids such as 2-ethylhexanoic acid are also preferred. 6-10 Aliphatic carboxylic acids are more preferred.

[0084] The metal that forms the metal carboxylate is not particularly limited, and examples thereof include the metals exemplified as the metals that form the metal chelate compounds. The metals can be used alone or in combination of two or more. Carboxylic acids that do not form salts are difficult to condense and cannot promote room temperature curing, so they are not preferred as curing catalysts.

[0085] Examples of metal carboxylates include aluminum carboxylate, titanium carboxylate, zirconium carboxylate, niobium carboxylate, magnesium carboxylate, calcium carboxylate, chromium carboxylate, manganese carboxylate, iron carboxylate, cobalt carboxylate, nickel carboxylate, copper carboxylate, zinc carboxylate, gallium carboxylate, palladium carboxylate, indium carboxylate, tin carboxylate, tantalum carboxylate, etc. These metal carboxylates can be used alone or in combination of two or more.

[0086] Of these metal carboxylates, zinc carboxylate, iron carboxylate, cobalt carboxylate, and manganese carboxylate are preferred.

[0087] Examples of zinc carboxylates include branched chain C carboxylates such as zinc acetate and zinc bis(2-ethylhexanoate). 2-12 Examples include aliphatic zinc carboxylates; alicyclic zinc carboxylates such as zinc naphthenate; and branched chain zinc carboxylates such as zinc bis(2-ethylhexanoate). 6-10 Aliphatic zinc carboxylates are preferred.

[0088] Examples of iron carboxylates include branched chain C carboxylates such as iron acetate and iron bis(2-ethylhexanoate). 2-12 Aliphatic iron carboxylates and alicyclic iron carboxylates such as iron naphthenate are examples of iron carboxylates. Among these, branched chain C iron carboxylates such as iron bis(2-ethylhexanoate) are particularly preferred. 6-10 Aliphatic iron carboxylates are preferred.

[0089] Examples of cobalt carboxylates include branched chain C carboxylates such as cobalt acetate and cobalt bis(2-ethylhexanoate). 2-12 Aliphatic cobalt carboxylates; alicyclic cobalt carboxylates such as cobalt naphthenate, etc. Among these, branched chain C cobalt carboxylates such as cobalt bis(2-ethylhexanoate) are preferred. 6-10 Aliphatic cobalt carboxylates are preferred.

[0090] Examples of manganese carboxylates include branched chain manganese carboxylates such as manganese acetate and manganese bis(2-ethylhexanoate). 2-12 Aliphatic manganese carboxylates; alicyclic manganese carboxylates such as manganese naphthenate, etc. Among these, branched chain manganese carboxylates such as manganese bis(2-ethylhexanoate) are preferred. 6-10 Aliphatic manganese carboxylates are preferred.

[0091] These curing catalysts (C) can be used alone or in combination of two or more, and it is preferable to use metal alkoxides, metal chelate compounds, and metal carboxylates individually. The curing catalyst (C) may also be prepared as a catalyst solution in a solvent described below. Among these curing catalysts (C), metal alkoxides and metal chelate compounds are preferred, and titanium-based curing catalysts such as titanium alkoxides and titanium chelate compounds are more preferred.

[0092] The proportion of the curing catalyst (C) may be selected from a range of, for example, about 0.05 parts by mass or more but less than 20 parts by mass (e.g., 0.1 to 19 parts by mass, preferably 1 to 18.5 parts by mass) relative to 100 parts by mass of the silicone-based resin component (A). The lower limit is, for example, 0.3 parts by mass or more (e.g., 0.5 parts by mass or more), preferably 0.6 parts by mass or more (e.g., 0.8 parts by mass or more), more preferably 1 part by mass or more (e.g., 3 parts by mass or more), and particularly 5 parts by mass or more (e.g., 8 parts by mass or more). The upper limit is, for example, 19 parts by mass or less (e.g., 18.5 parts by mass or less), preferably 16 parts by mass or less (e.g., 14 parts by mass or less), and more preferably 12 parts by mass or less. If the proportion of curing catalyst (C) is too low, the water slippage may decrease and rapid curing at room temperature may become difficult. Conversely, if the proportion is too high, snow and ice shedding properties and water slippage may decrease, weather resistance may decrease, and cracks may easily occur, resulting in poor appearance (or reduced visibility of the substrate).

[0093] (D) Solvent The solvent (D) is not particularly limited as long as it is a solvent that can dissolve and / or disperse the silicone resin component (A), reactive silicone oil component (B), and curing catalyst (C) [also simply referred to as components (A) to (C)].

[0094] Examples of the solvent (D) include alcoholic solvents such as methyl alcohol, ethyl alcohol, and isopropyl alcohol (or 2-propanol) (e.g., C 1-4alkanols, etc.); ester solvents such as ethyl acetate, butyl acetate, methoxybutyl acetate, ethyl glycol acetate, and amyl acetate; glycol ether solvents such as ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether; ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, and acetylacetone; paraffin solvents such as isopentane, n-hexane, isohexane, n-heptane, isoheptane, n-octane, isooctane, nonane, isononane, decane, isodecane, and mineral turpentine; naphthenic solvents such as cyclopentane and cyclohexane; aromatic hydrocarbon solvents such as benzene, toluene, xylene, and trimethylbenzene; and petroleum solvents such as mineral spirits. These solvents can be used alone or in combination.

[0095] Among these, alcohol-based solvents (C such as 2-propanol) 2-3 alkanol), paraffinic solvents [preferably isoparaffinic solvents (e.g., C 10 solvents such as isopentane, isohexane, isoheptane, isooctane, isononane, and isodecane) from the viewpoint of workability (coating property and paintability)] 4-12 Isoparaffinic solvents, preferably C 7-10 isoparaffin-based solvents, etc.) may also be used.

[0096] Furthermore, in order to ensure the stability of the coating material, it is preferable that the solvent (D) is substantially free of water. The proportion of water in the composition may be 1% by mass or less, preferably 0.5% by mass or less, more preferably 0.1% by mass or less, and most preferably free of water.

[0097] The proportion of the solvent (D) is not particularly limited and may be adjusted appropriately depending on factors such as workability (applicability and coating ability) and the desired thickness of the cured film (average thickness or weight after drying). The proportion of the total amount of components (A) to (C) (particularly the concentration of the solids that form the cured product) relative to the entire curable composition (particularly the total amount of the components (A) to (D)) may be adjusted to, for example, 4 to 95% by mass (e.g., 9.5% by mass or more). The lower limit is, for example, 4% by mass or more (e.g., 8% by mass or more), preferably 10% by mass or more (e.g., 20% by mass or more), more preferably 25% by mass or more (e.g., 30% by mass or more), and particularly 40% by mass or more. The upper limit is, for example, 95% by mass or less (e.g., 90% by mass or less), preferably 80% by mass or less (e.g., 70% by mass or less), more preferably 65% ​​by mass or less (e.g., 60% by mass or less), and particularly 55% by mass or less (e.g., 50% by mass or less). If the total proportion of components (A) to (C) is too low, depending on the substrate to be applied and the surface condition, repelling or dullness (white out) may occur during application, reducing the visibility of the substrate and resulting in poor appearance, making it impossible to ensure the transparency of the cured product (or the visibility of the substrate (substrate)), and workability (applicability, coating ability) may be reduced [for example, productivity or application ability may be reduced (painting work may take a long time)]. Conversely, if the proportion is too high, the workability (applicability, coating ability) of the curable composition may be reduced, rapid drying after application may easily cause uneven thickness of the cured film, and depending on the application method (for example, when applying with a sponge or brush), paint marks may be easily left, which may reduce workability (applicability, coating ability) and the visibility of the substrate.

[0098] (E) Other ingredients The curable composition of the present invention may further contain a colorant such as a pigment depending on its use and purpose, but it is preferable that it does not contain a colorant such as a pigment in uses where transparency (or visibility of the base) is important. Pigments include inorganic pigments and organic pigments. Of these, inorganic pigments are preferred in terms of weather resistance, etc.

[0099] Examples of inorganic pigments include simple metals such as aluminum and silver; metal oxides such as zinc oxide, aluminum oxide, chromium oxide, titanium oxide (TiO), and iron oxide [e.g., iron oxyhydroxide (FeOOH)]; composite metal oxides such as CuCrO, Cu(Cr,Mn)O, Cu(Fe,Mn)O, Co(Fe,Cr)O, CoAlO, and CoTiO; and pearl mica (a pigment in which natural or synthetic mica is coated with a metal oxide such as titanium oxide or tin oxide). These inorganic pigments can be used alone or in combination. Of these, metal oxides and composite metal oxides are preferred.

[0100] The pigment may be in the form of granules, plates, scales, etc. The average particle size of the pigment is, for example, 0.01 to 500 μm, preferably 0.1 to 200 μm, more preferably 0.5 to 100 μm, and most preferably 1 to 10 μm.

[0101] When a pigment is contained, the proportion thereof can be appropriately selected depending on the color development and hiding properties of the cured product (cured film), and is 30% by mass or less, for example, about 0.1 to 10% by mass, in the curable composition.

[0102] The curable composition of the present invention may further contain conventional additives. Examples of conventional additives include antifouling agents (e.g., cuprous oxide, organotin compounds, thiocarbamates, etc.), stabilizers (antioxidants, ultraviolet absorbers, heat stabilizers, etc.), plasticizers, antistatic agents, flame retardants, dispersants, surfactants, fillers, viscosity modifiers, preservatives, antifungal agents, antibacterial agents, and leveling agents. The total proportion of the conventional additives in the curable composition may be 30% by mass or less, for example, about 0.1 to 10% by mass.

[0103] [Method for preparing curable composition] The method for preparing the curable composition (coating composition) of the present invention is not particularly limited as long as it is a method of mixing the above-mentioned specific silicone resin component (A) and the specific reactive silicone oil component (B) in a predetermined ratio. For example, it may be prepared as a one-component curable composition, or from the viewpoint of storage stability, it may be prepared as a two-component curable composition.

[0104] When preparing a one-component curable composition, for example, at least a silicone resin component (A) and a reactive silicone oil component (B), and optionally a curing catalyst (C), a solvent (D), and other components (E), are blended in the absence of atmospheric moisture (humidity). Specifically, the components may be blended and mixed under an inert gas atmosphere such as nitrogen gas, and the mixture may be sealed in a container. When blending a pigment as the other component (E), the pigment may be dispersed in an organic solvent beforehand and mixed with the other components. The resulting one-component curable composition is usually applied to a substrate (or target object) at the application site immediately before use, with the container opened.

[0105] When preparing a two-component curable composition, the method for dividing the two components is not particularly limited. The two liquid compositions may be prepared by appropriately dividing them into two liquid compositions, taking into consideration factors such as the type of each component [e.g., components (A) to (E)] and storage stability. For example, when at least components (A) to (D) are used, the silicone resin component (A) and the reactive silicone oil component (B) may be mixed to prepare a silicone composition (first liquid composition), and the catalyst (C), solvent (D), and optionally other components (E) may be mixed separately to prepare a catalyst composition (second liquid composition). When a pigment is added as the other component (E), it may be dispersed in an organic solvent before blending, as with a one-component curable composition. The two-component curable composition prepared in this manner is typically mixed with the silicone composition and catalyst composition at the application site to prepare a curable composition for application.

[0106] [Uses of the curable composition] The curable composition of the present invention can be used as various coating compositions (particularly as a snow damage prevention paint composition for promoting snow and ice shedding). For example, by coating the curable composition of the present invention on the surface of a substrate and curing it to form a cured product (cured film, coating film, or protective film), not only water repellency but also snow and ice shedding properties can be imparted to the substrate.

[0107] The cured product may be a cured film that covers at least the surface of the substrate, or may be a cured product that has penetrated into the substrate. Alternatively, a portion of the cured product may form a cured film that covers the surface of the substrate, and the remainder may penetrate into the substrate to form a cured product. For example, by coating the curable composition of the present invention on the surface of a substrate to be protected and curing it to form a protective film, snow and ice adhering to the object can be made to fall off naturally (without the application of force) (snow and ice shedding is promoted).

[0108] Therefore, the present invention includes a method of coating the surface of a substrate with the curable composition to form a cured film and promoting the shedding of snow and ice from the surface of the substrate; and also includes a composite comprising a substrate and a cured film that covers the surface of the substrate and is formed from the cured product.

[0109] The material of the substrate is not particularly limited, and may be formed from, for example, an organic material such as a resin (e.g., a transparent resin such as a methyl methacrylate resin or a polycarbonate resin), a ceramic (e.g., glass), or an inorganic material such as a metal (e.g., aluminum or an alloy thereof, stainless steel, etc.).

[0110] If necessary, various functional layers (coatings, coatings, or treated surfaces) may be formed on the substrate surface to impart functions such as adhesion, colorability (design, decorativeness, or aesthetics), hard coat properties, durability, waterproofing, and stain resistance. These functional layers may be formed alone or in combination of two or more. A typical functional layer is an adhesive layer for improving adhesion between the substrate surface and the cured product of the present invention (cured film or top coat layer (outermost layer)). For example, the substrate (particularly a resin substrate) may have an adhesive layer (primer layer) formed on the surface using a primer or the like. The primer is not particularly limited as long as it ensures adhesion between the substrate surface and the cured product (adhesion between the substrate and primer layer and between the primer layer and cured film (top coat layer)). Conventional primers can be used depending on the type of substrate. A primer layer is not necessarily required; the substrate surface may be roughened (e.g., by blasting) to form a treated surface (or surface treatment layer) such as an uneven surface to improve adhesion with the cured product.

[0111] To effectively achieve the effects of the present invention, the curable composition is preferably applied to a substrate (member) that forms at least a portion of an outdoor structure. Examples of outdoor structures include structures or buildings installed outdoors (buildings, storage tanks, bridges, utility poles, cables, antennas, signs or signboards (road signs, guide signs, etc.), billboards, electronic bulletin boards, traffic signals (traffic signals, particularly LED traffic signals), street lamps, lighthouses, etc.), and transportation equipment used outdoors (automobiles, vehicles, ships, aircraft, etc., preferably covers or housings for such transportation equipment (e.g., covers or housings for electric or electronic components such as lights (or lamps), sensors (vehicle sensors, railway vehicle speedometers, etc.)). In particular, because transparency can be easily ensured even after the formation of a cured product (cured film), the composition is effectively applied to outdoor structures where the visibility of the substrate is particularly important, such as road signs, guide signs, billboards, electronic bulletin boards, traffic signals, street lamps, lighthouses, etc.

[0112] Examples of coating methods include spray coating, bar coating, spin coating, dispenser coating, sponge coating, brush coating, spatula coating, roller coating, and dipping. Among these, spray coating is preferred. The curable composition of the present invention does not require wiping or other operations and is excellent in workability (applicability and coating properties).

[0113] The coating amount (applied amount) of the curable composition may be adjusted as appropriate depending on the substrate, application, coating method, thickness (average thickness) of the cured film, etc., and may be, for example, 0.1 to 80 g / m in terms of weight after drying (weight of the cured product (cured film) formed after drying). 2 , preferably 5 to 40 g / m 2 , and more preferably 10 to 20 g / m 2 The coating may be performed once, or may be repeated, for example, to achieve a desired average thickness. If the weight after drying (weight as cured product) is too high, workability (applicability, coating ability) may decrease, weather resistance may decrease (e.g., cracks may easily occur), and the visibility of the base may decrease. Conversely, if the weight is too low, depending on the substrate, the base may become white and visibility may decrease, durability and mechanical strength may decrease, and resistance to scratches (or impacts) may also decrease.

[0114] In the present invention, the coated composition may be cured by leaving it together with the substrate at room temperature (e.g., 20 to 30°C, preferably about 23°C). The humidity during leaving may be, for example, 10 to 90% RH (e.g., 30 to 70% RH), preferably 40 to 60% RH (e.g., about 50% RH). The leaving time is not particularly limited, and may be any time that allows the solvent (D) and the like to be evaporated (removed) and a cured product to be formed, and may be, for example, 30 minutes or more (e.g., 1 hour or more), preferably 5 hours or more (e.g., 10 hours or more), and more preferably about 10 to 50 hours. When the silicone-based resin component (A), the reactive silicone-based oil component (B), and the curing catalyst (C) contain alkoxy groups, alcohol generated as a by-product during the curing reaction upon leaving at room temperature may be removed (distilled off) during this time.

[0115] The curable composition of the present invention may be of a cold-curing type, but may be heated as needed (for example, by further heat curing after cold curing), or may be heat-cured instead of cold curing. The heating temperature is not particularly limited and may be 50°C or higher (for example, about 50 to 120°C). Heating can further improve the hardness of the cured product.

[0116] The surface of the cured product (or cured film) thus obtained exhibits excellent snow and ice shedding properties. When snow is adhered to the surface of the cured product, the temperature is raised from -15°C to 8-10°C over 30 minutes, and the temperature is maintained at 8-10°C, the time it takes for the snow to fall off may be shorter than the time it takes for snow adhered to the surface of a substrate (an untreated substrate on which a cured film has not been formed) [e.g., a metal substrate such as an A5052 aluminum alloy plate, a resin substrate such as a polymethyl methacrylate plate, etc.]. The specific snow shedding time on the cured film surface of the present invention may be, for example, 0.5 minutes or more (e.g., 1-30 minutes), preferably 3 minutes or more (e.g., 5-15 minutes), and more preferably about 8 minutes or more, faster than when snow is adhered to the surface of the untreated substrate (e.g., an A5052 aluminum alloy plate). In this specification and claims, snow shedding properties (snow shedding time) can be measured by the method described in the snow shedding test in the Examples section below.

[0117] Furthermore, since the surface of the cured product (or cured film) exhibits excellent water repellency, the water contact angle on the surface of the cured product may be, for example, about 70° or more (e.g., 80 to 130°), and preferably about 90 to 120° (e.g., 100 to 110°). In this specification and claims, the water contact angle on the surface of the cured product can be measured by the method described in the water repellency test in the Examples below.

[0118] Furthermore, the surface of the cured product (or cured film) can also exhibit excellent water sliding properties. The water sliding angle on the surface of the cured product may be, for example, about 0 to 40° or less (e.g., 35° or less), preferably 30° or less (e.g., 1 to 30°), more preferably 25° or less, and particularly 20° or less (e.g., 5 to 10°). In this specification and claims, the water sliding angle on the surface of the cured product can be measured by the method described in the water sliding test in the Examples below.

[0119] Furthermore, the curable composition has excellent workability (applicability and coating properties), and therefore can form a coating film (cured film) with a good appearance; for example, it is free from cracks and / or dullness, and even when applied to various substrates, it has a good appearance and the visibility of the base is easily ensured, and even when applied by various methods such as sponge application or brush application, it is possible to easily or efficiently form a coating film with reduced paint marks and cissing.

[0120] Furthermore, the surface of the cured product (or cured film) can also exhibit excellent durability (weather resistance or light resistance). Therefore, even after 480 hours of accelerated weather resistance testing in accordance with JIS K 5600 7-7 (General Test Methods for Paints) (accelerated weather resistance and accelerated light resistance, xenon lamp method), the properties before the test, such as the water sliding angle and coating film appearance on the cured product surface, can be effectively retained. In this specification and claims, the accelerated light resistance test of the cured product surface can be measured by the method described in the Examples below.

[0121] When the cured product forms a cured film, the average thickness of the cured film may be, for example, 1 to 80 μm (e.g., 5 to 20 μm), preferably about 10 to 15 μm. If the average thickness is too thick, workability (applicability, coating ability) may be reduced, weather resistance may be reduced (e.g., cracks may be more likely to occur), and visibility of the substrate may be reduced. Conversely, if the average thickness is too thin, depending on the substrate, visibility may be reduced due to whitening, durability and mechanical strength may be reduced, and resistance to scratches (or impacts) may also be reduced. [Example]

[0122] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Details of the raw materials used and the evaluation methods are shown below.

[0123] [Raw materials used] (A) Silicone resin component KR-500: Methyl silicone methoxy oligomer, composed of T units, kinematic viscosity at 25°C 25mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. KR-400: Methyl silicone methoxy oligomer, composed of T units (containing 10% by mass of organoaluminum catalyst DX-9740), kinematic viscosity at 25°C: 1.2 mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. KC-89S: Methyl silicone methoxy oligomer, composed of T units, kinematic viscosity 5mm at 25℃ 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. X-40-9225: Methyl silicone methoxy oligomer, composed of T units, kinematic viscosity 100mm at 25°C 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. X-40-9246: Methyl silicone methoxy oligomer, consisting of T and D units, kinematic viscosity at 25°C 80mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. X-40-9250: Methyl silicone methoxy oligomer, consisting of T and D units, kinematic viscosity at 25°C 80mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. (B) Silicone oil component KR-4000A: Alkoxy-modified at one end, kinematic viscosity at 25°C 60mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. KP-983: Alkoxy-modified at one end, kinematic viscosity at 25°C 23mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. X-22-176DX: Diol-modified at one end, kinematic viscosity at 25°C 126mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. KF-96-1000cs: Non-reactive silicone oil (polydimethylsiloxane), kinematic viscosity 1000mm at 25°C 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd. (C) Curing catalyst D-25: Titanium-based (titanium (IV) tetra-n-butoxide), manufactured by Shin-Etsu Chemical Co., Ltd. Orgatix TC-401: Titanium chelate (titanium(IV) tetraacetylacetonate), 65% by mass solution in 2-propanol, manufactured by Matsumoto Fine Chemical Co., Ltd. DX-9740: Aluminum-based, manufactured by Shin-Etsu Chemical Co., Ltd. (D) Solvent 2-Propanol (IPA): Vapor pressure 4 kPa at 20°C, manufactured by Kanto Chemical Co., Ltd. ISOPAR-E: Isoparaffinic solvent, vapor pressure 2.37 kPa at 20°C, manufactured by ExxonMobil

[0124] [Preparation of Curable Composition] The silicone resin component (A), silicone oil component (B), curing catalyst (C), and solvent (D) were mixed in a 200 mL glass container in the mass proportions shown in the tables (Tables 2 to 6) described below, and the mixture was stirred for 10 minutes using a magnetic stirrer to prepare curable compositions.

[0125] [Preparation of test specimens] The test objects (substrates) used were flat test pieces (dimensions: 150 mm x 70 mm, thickness: 2 mm, materials: polymethyl methacrylate resin plate, polycarbonate resin plate, and A5052 aluminum alloy plate). One side of each test piece was treated with a primer appropriate for each material. A curable composition was applied to the treated surface in an amount of 10 to 15 g / m2 after drying. 2 The coating was applied using an air spray ("W-101-101E" manufactured by Anest Iwata Corporation) so that the coating was as follows: The coating was then left to stand for 24 hours in an atmosphere at room temperature (23°C) and a humidity of 50% RH to produce test specimens with a dried coating (cured film) having a thickness of 10 to 15 μm.

[0126] [Evaluation method for cured film] (Snow removal test (using shaved ice)) Shaved ice simulating wet snow was made using pure water (deionized water) and an electric ice shaver (Yamazen Corporation, "YSIA-F25"). At temperatures below -15°C, the shaved ice was passed through a sieve (5 mm opening) onto a horizontal test piece (substrate: A5052 aluminum alloy plate) at a concentration of 0.15 to 0.30 g / cm. 2 After leaving the test piece at approximately -15°C for 5 minutes, the test piece was tilted at 90° (perpendicular to the ground). The temperature was gradually raised from -15°C to approximately 8-10°C over 30 minutes, and the test piece was then maintained at 8-10°C, after which the snow (shaved ice) falling from the test piece was observed. The faster the snow fell off compared to an untreated substrate (untreated A5052 aluminum alloy plate) that was not coated with the curable composition (no cured film formed), the better the snow and ice shedding was judged to be.

[0127] 〇: Snow falls off earlier than on untreated substrate △: Snow falls at the same time as on untreated substrate ×: The timing of snow falling is slower than that of the untreated substrate.

[0128] (Water repellency test) The contact angle of pure water (deionized water) was measured using a contact angle meter (OCA 15EC, manufactured by Data Physics Instruments GmbH). The test specimen was placed on a sample table so that the dry coating (cured film) was horizontal, and a 3 μL water droplet was placed on the surface of the dry coating. The water contact angle of the water droplet was measured using the contact angle meter. The average value of the three measurements was used as the contact angle value. A water contact angle of 90° or more was considered to be excellent in water repellency. Test specimens with a substrate of polymethyl methacrylate resin plate or polycarbonate resin plate were used.

[0129] ○: Water contact angle of 90° or more △: Water contact angle 70° to less than 90° ×: Water contact angle less than 70°.

[0130] (Water sliding test) The sliding angle of pure water (deionized water) was measured using a contact angle meter (OCA 15EC, manufactured by Data Physics Instruments GmbH). The test specimen was placed on a sample table so that the dry coating (cured film) was horizontal, and a 50 μL water droplet was placed on the surface of the dry coating. The sample table was gradually tilted to measure the tilt angle (sliding angle) at which the water droplet began to slide. The average value measured at three points was taken as the sliding angle. A water sliding angle of 25° or less was considered to have excellent water sliding properties. Test specimens with a substrate of polymethyl methacrylate resin plate or polycarbonate resin plate were used.

[0131] 〇: Sliding angle 25° or less △: Sliding angle is over 25° and less than 40° ×: Sliding angle is over 40° and less than 90° (water droplets fall) XX: No water droplets fall even when the test piece is tilted at an angle of 90°.

[0132] (Appearance of the coating) The dried coating (cured film) of the test piece was visually observed and evaluated according to the following criteria: The dried coating (cured film) of each test piece prepared using three types of substrate (polymethyl methacrylate resin plate, polycarbonate resin plate, and A5052 aluminum alloy plate) was observed, and the results of the test piece that received the lowest evaluation (poor appearance) are shown in the tables (Tables 2 to 6) described below.

[0133] ○: No cracks or dullness on the dried film △: There are cracks or dullness on the dried coating ×: Both cracks and dullness are present on the dried coating ××: Not dry to the touch.

[0134] (Accelerated weathering test) Accelerated weathering tests were conducted on test specimens using a "Super Xenon Weather Meter" manufactured by Suga Test Instruments Co., Ltd., under conditions conforming to JIS K 5600 7-7 General Test Methods for Paints (accelerated weathering resistance and accelerated light resistance, xenon lamp method). Test specimens with a polymethyl methacrylate resin substrate were used. Using the test specimens obtained after 480 hours of accelerated weathering testing, weathering resistance was evaluated using the same methods and evaluation criteria as in the above sections (Water Slippage Test) and (Appearance of Coating Film).

[0135] [Evaluation method for coating film of silicone oil component (B)] A composition (diluted solution) was prepared by mixing 1 part by mass of the reactive silicone oil component (B) and 99 parts by mass of an isoparaffin solvent ("ISOPAR-E" manufactured by ExxonMobil Corporation), and the resulting composition was applied to a smooth polycarbonate resin substrate (JIS K 6735 compliant) at a rate of 10 g / m 2 The test piece was left to stand for 24 hours at room temperature (23°C) and 50% RH to produce a test piece with a dried film (dried product) on one side. The water contact angle and water sliding angle of the obtained dried film were evaluated using the same methods as in the (water repellency test) and (water sliding test) described above.

[0136] The evaluation results of the dried film (coating film) of the silicone oil component (B) are shown in Table 1 below.

[0137] [Table 1]

[0138] [Examples 1-1 to 1-4 and Reference Examples 1-1 to 1-2] Curable compositions were prepared in the mass proportions shown in Table 2 below, and test pieces were prepared using the obtained curable compositions. The compounding ratios of the curable compositions and the evaluation results are shown below.

[0139] Unless otherwise specified, in the tables, "(A) / total" indicates the mass ratio of the silicone resin component (A) to the entire curable composition (the total amount of components (A) to (D)), and "((A) + (B) + (C)) / total" indicates the mass ratio of the total amount of components (A) to (C) to the entire curable composition [concentration of the components (solids excluding solvent) that form the cured film] (the same applies to the following tables). The values ​​in parentheses in Examples 1-2 represent values ​​calculated based on 90.00 parts by mass of the methyl silicone methoxy oligomer as component (A) and 10.00 parts by mass of the organoaluminum catalyst DX-9740 as component (C) out of 100.00 parts by mass of KR-400.

[0140] [Table 2]

[0141] As is clear from the results in Table 2, the Examples (examples of the silicone-based resin component (A) formed from T units) exhibited excellent snow and ice shedding properties, water repellency, water sliding properties, appearance, and weather resistance. Furthermore, the test pieces of all Examples exhibited excellent visibility of the substrate. On the other hand, the Reference Examples (examples of the silicone-based resin component (A) containing D units) exhibited good water repellency and appearance, but exhibited poor snow and ice shedding properties and water sliding properties.

[0142] [Examples 2-1 to 2-3 and Reference Examples 2-1 to 2-2] Curable compositions were prepared in the mass proportions shown in Table 3 below, and test pieces were prepared using the obtained curable compositions. The compounding ratios of the curable compositions and the evaluation results are shown below.

[0143] [Table 3]

[0144] As is clear from the results in Table 3, the examples (examples of the silicone-based oil component (B) modified at one end) had excellent snow and ice shedding, water repellency, water sliding, and appearance. Furthermore, the test pieces of all examples had excellent visibility of the substrate. Example 2-3 (examples of the silicone-based oil component (B) modified at one end with a diol) had poor weather resistance.

[0145] On the other hand, in Reference Example 2-1 (an example of unmodified silicone oil component (B)), although the water repellency was excellent, the snow and ice shedding properties and water sliding properties were low. Therefore, it was found that high water repellency does not necessarily mean excellent snow and ice shedding properties.

[0146] Furthermore, Reference Example 2-2 (an example corresponding to the components and proportions of the curable composition described in Patent Document 2) had excellent water repellency and better water sliding properties than Reference Example 2-1, but had poor snow and ice shedding properties. Therefore, it appears that the non-stickiness of the cured film described in Patent Document 2 has little effect on snow and ice shedding properties.

[0147] In the snow-shedding test of Example 2-1(1-1), the snow fell off about 10 minutes faster than that of an untreated substrate (A5052 aluminum alloy plate). Furthermore, when the test was conducted in the same manner except that the test specimen (substrate: A5052 aluminum alloy plate) for the snow-shedding test was changed to a specimen based on a polymethyl methacrylate plate, the snow fell off faster in all of Examples 2-1(1-1) to 2-3 than in the untreated polymethyl methacrylate plate (evaluated as ○).

[0148] [Examples 3-1 to 3-8 and Reference Example 3-1] Curable compositions were prepared in the mass proportions shown in Table 4 below, and test pieces were prepared using the obtained curable compositions. The compounding ratios of the curable compositions and the evaluation results are shown below.

[0149] [Table 4]

[0150] As is clear from the results in Table 4, in the Examples, excellent snow and ice shedding properties and water repellency were achieved even when the proportion of the one-end-modified silicone oil component (B) was changed within a specified range. On the other hand, in Reference Example 3-1, in which the proportion of the silicone oil component (B) was low, water repellency was maintained but snow and ice shedding properties were reduced.

[0151] Among Examples 3-1 to 3-6, Example 3-6 was prone to cissing during application, possibly due to the excessive amount of silicone oil component (B) for enhancing water repellency, resulting in poor appearance due to dull gloss. Unlike Examples 3-1 to 3-5, workability (applicability, coating ability) and visibility of the base (appearance) were slightly reduced. Note that cissing tended to occur more easily as the proportion of component (B) increased. For example, when application was performed with a sponge instead of spray coating, cissing did not occur in Example 3-3, but did occur in Example 3-4.

[0152] Furthermore, even when the type of silicone resin component (A) in Examples 3-1 to 3-6 was changed, no differences were observed in the properties [snow and ice removal, water repellency, water slippage, coating film appearance, weather resistance, and workability (e.g., cissing resistance)]. That is, when KR-400, KC-89S, or X-40-9225 (100 parts by mass in each case) was used instead of KR-500 (100 parts by mass) in Examples 3-1 to 3-6, the results for each of the properties were the same as those for Examples 3-1 to 3-6 (note that the examples using KR-400 were prepared (as shown in Table 2) without adding D-25 as a curing catalyst in Examples 3-1 to 3-6).

[0153] [Examples 4-1 to 4-8 and Reference Examples 4-1 to 4-2] Curable compositions were prepared in the mass proportions shown in Table 5 below, and test specimens were prepared using the resulting curable compositions. The blending ratios of the curable compositions and the evaluation results are shown below. The values ​​in parentheses for Examples 4-6 and 4-8 represent values ​​calculated with the solid content of TC-401 as component (C).

[0154] [Table 5]

[0155] As is clear from the results in Table 5, regardless of the type of curing catalyst, all of the Examples had excellent snow and ice removal properties and water repellency. In addition, the test pieces of all of the Examples had excellent visibility of the substrate.

[0156] Reference Example 4-1 shows that when the proportion of curing catalyst (C) was low, the composition could not be cured at room temperature, and even when heated to about 100°C, a cured film could not be formed. In Example 4-1, although the water sliding property was slightly reduced compared to Examples 4-2 and 4-3, the snow and ice shedding property, water repellency, and appearance were all good.

[0157] On the other hand, Reference Example 4-2 showed that a high ratio of the curing catalyst (C) tended to decrease the snow and ice shedding property and water sliding property. In addition, in Example 4-4, although the water sliding property was slightly decreased compared to Examples 4-2 and 4-3, the snow and ice shedding property, water repellency, and appearance were all good, but poor appearance due to cracks occurred after weathering treatment.

[0158] In addition, Examples 4-7 and 4-8 are examples in which the type of solvent (D) was changed from Examples 4-3(1-1) and 4-6, respectively. Both Examples 4-7 and 4-8 had good snow and ice removal properties, water repellency, water sliding properties, appearance, weather resistance, and visibility, and also had excellent workability (applicability and coating ability) compared to Examples 4-3(1-1) and 4-6.

[0159] [Examples 5-1 to 5-5] Curable compositions were prepared in the mass proportions shown in Table 6 below, and test pieces were prepared using the obtained curable compositions. The compounding ratios of the curable compositions and the evaluation results are shown below.

[0160] [Table 6]

[0161] As is clear from the results in Table 6, regardless of the ratio of the total amount of components (A) to (C) to the entire curable composition (total amount of components (A) to (D)) (solids concentration forming the cured film), all examples had excellent snow and ice removal properties, water repellency, and water sliding properties.

[0162] In Example 5-1, some test pieces became whitish after drying, and gloss loss (white blur) was observed, the visibility of the base was low, and the appearance was rated as fair. Furthermore, in Example 5-1, a larger amount had to be applied than in the other examples to achieve the specified post-dry weight (or film thickness), and repelling tended to occur easily during this process, resulting in poor workability (applicability and coating ability).

[0163] On the other hand, in Examples 5-2 to 5-5, all test pieces had excellent visibility of the base, and the workability of spray coating (applicability, paintability) was also good. However, when applying with a sponge or brush instead of spray coating, unlike Examples 5-1 to 5-4, paint marks were likely to remain on the coating film, possibly because the solid content concentration was too high in Example 5-5, and the workability (applicability, paintability) and visibility of the base (appearance) were slightly reduced. [Industrial Applicability]

[0164] The curable composition of the present invention has water repellency and snow and ice shedding properties when cured, and therefore can be effectively used as various coating compositions (paint compositions), particularly as coating compositions for snow damage countermeasures (for promoting snow and ice shedding) (snow and ice prevention or snow and ice shedding promotion paints). Furthermore, because the curable composition of the present invention can be moisture-cured at room temperature, it is suitable for use in applications that do not require heat treatment and is also suitable for use in places where the use of fire is restricted.

[0165] Furthermore, the curable composition of the present invention has excellent durability and is therefore suitable for outdoor use, general household use, etc. Therefore, it can be used as a composition for preventing adhesion of snow, ice, etc. to the surfaces of buildings and structures such as buildings, storage tanks, bridges, utility poles, traffic signals, cables, antennas, and signs, as well as transportation equipment such as automobiles, vehicles, ships, and aircraft.

[0166] Specifically, it can be used as a composition for preventing the adhesion of snow and / or ice, in particular as a composition for promoting the removal of snow and ice (snow and ice removal-accelerating paint), and can be used as a protective film (snow and ice removal-accelerating film) for the surfaces of, for example, road signs, traffic lights (such as LED traffic lights), ETC sensors, soundproof walls on expressways, track switches, roofs, parabolic antennas, electric wires, bridges, meteorological measuring instruments (wind meters), wind turbine blades, transportation equipment [automobiles (windows, wheels, snowplow propellers, etc.), vehicles (railroad vehicle pantographs, etc.), ships, aircraft (airplane blades, drones, etc.)], covers or housings used in transportation equipment, etc. [for example, covers or housings for electrical and electronic components such as lights (or lamps), sensors (on-board sensors, railroad vehicle speedometers, etc.)].

Claims

1. A curable composition comprising a silicone-based resin component (A), a reactive silicone-based oil component (B) having at least one reactive group, and a curing catalyst (C), the silicone-based resin component (A) is substantially free of D units, the proportion of the reactive silicone oil component (B) is 0.1 to 1.2 parts by mass per 100 parts by mass of the silicone resin component (A), the proportion of the curing catalyst (C) is 0.8 to 12 parts by mass per 100 parts by mass of the silicone-based resin component (A), the total amount of the silicone-based resin component (A), the reactive silicone-based oil component (B), and the curing catalyst (C) is 8 mass% or more based on the total amount of the curable composition; A curable composition that is a coating composition for promoting snow and ice shedding and / or water sliding.

2. A curable composition comprising a silicone-based resin component (A), a reactive silicone-based oil component (B) having at least one reactive group, and a curing catalyst (C), the silicone-based resin component (A) is substantially free of D units, the proportion of the reactive silicone oil component (B) is 0.1 to 1.2 parts by mass per 100 parts by mass of the silicone resin component (A), the proportion of the curing catalyst (C) is 0.8 to 12 parts by mass per 100 parts by mass of the silicone-based resin component (A), the total amount of the silicone-based resin component (A), the reactive silicone-based oil component (B), and the curing catalyst (C) is 8 mass% or more based on the total amount of the curable composition; A curable composition that is substantially free of a silicone-based resin having D units.

3. 3. The curable composition according to claim 1, wherein the reactive silicone oil component (B) has a reactive group at only one molecular terminal.

4. 4. The curable composition according to claim 1, wherein the reactive group is a hydroxyl group directly bonded to a silicon atom and / or an alkoxy group directly bonded to a silicon atom.

5. The reactive silicone oil component (B) is a composition prepared under the following condition (i), and when a dried product is produced on a smooth substrate using the composition, the surface of the dried product exhibits the following characteristics (ii) and (iii): The curable composition according to any one of claims 1 to 4, characterized in that the components satisfy the following: (i) A composition consisting of 1 part by mass of a reactive silicone oil component (B) and 99 parts by mass of an isoparaffin solvent. (ii) The water contact angle of 3 μL of water is 90° or more (iii) The water sliding angle of 50 μL of water dropped is 25° or less

6. 6. The curable composition according to claim 1, further comprising a solvent (D), and the proportion of the total amount of the silicone-based resin component (A), the reactive silicone-based oil component (B), and the curing catalyst (C) is 9.5 mass% or more based on the total amount of the curable composition.

7. The curable composition according to any one of claims 1 to 6, which is a coating composition for promoting snow and ice removal.

8. The curable composition according to any one of claims 1 to 7, which is cured to form a cured product, and when snow is adhered to the surface of the obtained cured product and the temperature is raised from -15°C to 8 to 10°C over 30 minutes, the time it takes for the snow to fall off is shorter than the time it takes for snow adhered to the surface of an A5052 aluminum alloy plate to fall off.

9. A cured product of the curable composition according to any one of claims 1 to 8.

10. A method for producing a cured product, comprising coating the surface of a substrate with the curable composition according to any one of claims 1 to 8 and curing the resulting coating film.

11. A composite comprising a substrate and a cured film formed from the cured product according to claim 9, the cured film covering the surface of the substrate.

12. 12. The composite of claim 11, wherein the substrate is a substrate that forms at least a portion of an outdoor structure.

13. 13. The composite according to claim 12, wherein the outdoor structure is a road sign, a guide sign, a billboard, an electronic bulletin board, a traffic light, a street lamp, or a lighthouse.

14. A method for promoting snow and ice shedding on a surface of a substrate, comprising coating the surface of a substrate with the curable composition according to any one of claims 1 to 8 to form a cured film.

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