KR102028843B1 - Coating Composition and Method for Forming Coating Layer Using The Same - Google Patents

Abstract

The present invention relates to a coating composition, and to a method for forming a coating layer using the same and, more specifically, to a coating composition having excellent cushioning properties, anti-scratching properties, and coating properties of a coating film, and to a method for forming a coating layer using the same. The coating composition is natural-cured in a short time at the room temperature, and then the coating composition and the coating layer have excellent properties in durability, anti-scratching properties, cushioning properties, water repellency, and the like.

Description

Coating composition and method for forming a coating layer using the same {Coating Composition and Method for Forming Coating Layer Using The Same}

The present invention relates to a coating composition, a method for forming a coating layer using the same, and more particularly, to a coating composition having excellent cushioning properties, scratch resistance, coating properties of the coating film, a method for forming a coating layer using the same.

In the past, various countermeasures have been discussed to prevent contamination of the surface of articles. The surface of the foam is easily contaminated with dust, combustion additives, and the like. Therefore, by coating the surface of the article with wax to prevent contamination of the body or water repellent treatment, water contaminates the contaminants in the water by forming water droplets when the water contacts the surface of the article and rolling down below the surface. Difficult methods have been used.

In addition, according to the related art 1 (Korean Patent Publication No. 10-2005-0084617), the polysilazane-containing coating liquid is polysilazane having a Si-H bond, a diluting solvent, a catalyst such as 4,4'-trimethylenebis ( 1-methylpiperidine) is used to form a film using 0.1 to 10% is known.

In addition, according to the related art 2 (Korean Patent Publication No. 10-2009-0019226), in order to form a glass film for protecting the surface, a technique for forming a glass film through coating and curing the polysilazane is known.

In addition, according to the related art 3 (Korean Patent Laid-Open Publication No. 10-2005-0100412), a technique for realizing a high contact angle is known in the method of forming a coating film with a composition containing amino silicon.

In addition, according to the related art 4 (Korean Patent Laid-Open Publication No. 10-2014-0040634), a technique using an aluminum catalyst is known in a surface coating agent for coating a vehicle by combining a silicone-based coating agent and a fluorine-modified polysilazane. .

In addition, according to the related art 5 (Korean Patent Publication No. 10-2009-0004546), in the liquid silicone rubber coating composition, a technique for forming a cured coating layer using an organopolysiloxane, an addition reaction catalyst and the like is known.

According to the related arts 1 to 5, in the case of not forced curing in order to secure the coating property, there is a disadvantage that takes 7 to 20 days of curing time. Moreover, when trying to obtain hardening in a short time, there exists a problem that the characteristics, such as durability and a coating property, fall. Accordingly, an object of the present invention is to provide a coating composition having a natural hardening at room temperature in a relatively short time, and excellent properties in scratch resistance, cushioning, water repellency and the like.

The present invention provides a coating composition containing a silicone oil, a solvent, a first catalyst having a glycidyl group, a second catalyst having an amino group, a cushioning agent, and a solvent.

Further, another embodiment of the present invention, 40 to 70% by weight of the silicone oil, 0.5 to 2% by weight of the first catalyst having the glycidyl group, 0.5 to 2% by weight of the second catalyst having the amino group, imparting the cushioning properties It provides a coating composition, characterized in that 1 to 10% by weight, 20 to 45% by weight of the solvent.

In addition, another embodiment of the present invention, the first catalyst having a glycidyl group is a compound represented by the following formula (1),

(Wherein R1 to R3 are each independently selected from methoxy, ethoxy, propoxy, and n represents an integer of 1 to 10).

The second catalyst having an amino group is a compound represented by the following formula (2),

(Wherein R1 to R3 are each independently selected from an alkyl group having 1 to 5 carbon atoms, an aryl group, -Cl, -F, and CH2F, and n1 and n2 independently represent an integer of 1 to 3).

The density of the first catalyst is 1.00 to 1.1 g / mL, Tb is 110 to 130 ℃,

The density of the second catalyst is 1.00 to 1.1 g / mL, Tb provides a coating composition, characterized in that 130 to 150 ℃.

In addition, another embodiment of the present invention provides a coating composition characterized by further containing a compound represented by the following formula (3) as a cushion imparting agent.

(Wherein R1 and R2 are each independently selected from an alkyl group having 1 to 3 carbon atoms, methoxy, ethoxy, propoxy, and R3 and R4 are each independently an alkyl group having 1 to 3 carbon atoms, CF3-, CHF2) -, CH2F-, or any one selected from a phenyl group, n represents an integer of 1 to 5.)

In addition, another embodiment of the present invention, the R1 and R2 provide a coating composition, characterized in that each independently an alkyl group having 1 to 3 carbon atoms.

In addition, another embodiment of the present invention provides a method of coating a coating composition on a substrate.

In addition, another embodiment of the present invention provides a method for coating a substrate with a coating composition, characterized in that the coating is formed by dividing the upper layer and the lower layer.

In addition, another embodiment of the present invention, the ratio of the content of the cushioning imparting agent of the lower layer to the content of the cushioning imparting agent of the upper layer is 1: 0.1 to 1: 0.3 coating the coating composition on the substrate Provide a method.

According to the present invention, the coating composition has an advantage of providing a coating composition, a method of manufacturing the same, a coating film having excellent properties in durability, scratch resistance, cushioning, water repellency, etc. in a short time natural curing at room temperature.

Hereinafter, preferred embodiments of the present invention will be described in detail. The terms or words used in the specification and claims are not to be construed as being limited to conventional or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical matters of the present invention.

Embodiments described herein are preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, and thus, there may be various equivalents and modifications that may replace them at the time of the present application.

The coating composition of the present invention may include a silicone oil, a solvent, a first catalyst having a glycidyl group, a second catalyst having an amino group, a cushioning agent, a solvent.

The silicone oil is preferably 40 to 70% by weight, more preferably 50 to 60% by weight. If the silicone oil content is too high, the viscosity of the coating composition is increased, the embedding and coating properties worsen, if too low, there is a disadvantage that the thickness of the coating film becomes thin. Silicone oil may be a modified silicone oil, it may be used phenylmethyl polysiloxane (PhenylmethylPolysiloxane).

The solvent consists of a solvent capable of dissolving the silicone oil. Although it will not specifically limit, if it can dissolve a silicone oil, (1) As an aromatic compound solvent, (2) Hydrocarbon compound solvent, such as benzene, toluene, xylene, ethylbenzene, diethylbenzene, trimethylbenzene, triethylbenzene, etc. As n-pentane, i-pentane, n-hexane, i-hexane, n-heptane, i-heptane, n-octane, i-octane, n-nonane, i-nonane, n-decane, i-decane and the like And (3) as an alicyclic hydrocarbon compound solvent, (4) ethers, for example, ethylcyclohexane, methylcyclohexane, cyclohexane, cyclohexene, p-mentane, decahydronaphthalene, dipentene, limonene, etc. Methyl isobutyl ketone etc. can be used as (e) ketone solvents, such as ether, dibutyl ether, diethyl ether, methyl tertiary butyl ether, and anisole. Alcohols, such as ethanol, methanol, a propanol, can be used, Anhydrous ethanol is more preferable for reaction with a catalyst.

The solvent is preferably 20 to 45% by weight, more preferably 25 to 40% by weight. The solvent content can be determined in consideration of the volatility of the solvent.

As a 1st catalyst, the compound containing the glycidyl group represented by following General formula (1) can be used.

Formula (1)

Here, R1 to R3 are each independently selected from methoxy, ethoxy and propoxy, and n represents an integer of 1 to 10.

The density of the compound represented by the formula (1) is preferably 1.00 to 1.1 g / mL, and Tb (boiling temperature) is preferably 110 to 130 ° C.

It is more preferable to use the compound represented by the following general formula (1-1).

Formula (1-1)

The amino group containing compound represented by following General formula (2) can be used as a compound of a 2nd catalyst.

Formula (2)

Here, each of R1 to R3 is independently one selected from an alkyl group having 1 to 5 carbon atoms, an aryl group, -Cl, -F, and CH2F, and n1 and n2 each independently represent an integer of 1 to 3.

The density of the compound represented by the formula (2) is preferably 1.00 to 1.1 g / mL, and Tb (boiling temperature) is preferably 130 to 150 ° C.

It is preferable to use in combination of the compound represented by General formula (1) and the compound represented by General formula (2), and to use it in combination of the compound represented by General formula (1-1) and the compound represented by General formula (2) More preferred. Accordingly, when mixed with the silicone compound, curing may occur in a short time. The curing time is 5 minutes to 60 minutes, preferably curing may occur in 10 minutes to 40 minutes. The natural curing time of the conventional silicone compound is an advantage compared to the 7 to 14 days it takes.

It is preferable to use 0.5 to 2 weight% of a 1st catalyst, and it is more preferable to use 0.8 to 1.6 weight%. In addition, it is preferable to use 0.5-2 weight% of 2nd catalysts, and it is more preferable to use 0.8-1.6 weight%. When the first catalyst and the second catalyst are each less than 0.5% by weight, the force for drawing oxygen in the air becomes weak when the coating liquid is applied, and thus it is difficult to completely cure. When the first and second catalysts are each greater than 2% by weight, the coating liquid is prepared. After the curing, it is hardened immediately, and there is no time to apply the coating on the substrate, and the viscosity becomes too high even when applying, so that a uniform coating cannot be obtained.

As a cushioning imparting agent, the compound represented by following General formula (3) can be contained.

Formula (3)

Here, R1 and R2 are each independently selected from an alkyl group having 1 to 3 carbon atoms, methoxy, ethoxy and propoxy. From the viewpoint of the cushioning imparting agent, each of R 1 and R 2 is preferably an alkyl group having 1 to 3 carbon atoms. R3 and R4 are each independently selected from an alkyl group having 1 to 3 carbon atoms, CF3-, CHF2-, CH2F-, and a phenyl group, and n represents an integer of 1 to 5;

In order to improve cushioning property and abrasion resistance, the compound represented by the following general formula (4) may be further contained. Formula (4) may contain 1% to 10% by weight. More preferably 3% to 8% by weight, most preferably 4% to 7% by weight.

Formula (4)

Here, R is any one selected from a hydrogen atom, an alkyl group, and alkoxy. The alkyl group is preferably an alkyl group having 1 to 10 carbon atoms, particularly an alkyl group having a large carbon number is excellent in terms of flexibility, and most preferably an octyl group. The alkoxy group is preferably an alkoxy group having 1 to 10 carbon atoms. In particular, the alkoxy group is preferably CH3O-, C2H5O-, C3H7O- from the viewpoint of cushioning properties, and CH3O- is most preferred.

In addition, the ratio of R in the compound represented by the formula (4) in the point of imparting cushioning properties to the coating film is preferably both an alkyl group and alkoxy, especially in order to impart cushioning properties to the coating film The ratio of alkyl group and alkoxy group in the compound is preferably 1: 0.5 to 1: 2, and most preferably 1: 1. For example, in formula (4), four R may use an octyl group, and four R may use CH3O-.

The method of coating the substrate may include a first step of preparing the substrate and a second step of applying the coating composition. Here, the step of applying the coating composition has the advantage that a sufficient film thickness can be obtained even by performing once. When the conventional silicone oil is coated, it is necessary to form a multi-coating layer by coating several times. This is because when the conventional coating is applied thickly to the substrate, it is difficult for oxygen to enter the inside of the coating film, so the coating needs to be repeated several times. However, the present invention has a very advantageous effect in the process because it can obtain a constant thickness in one coating.

It can be obtained that the thickness of the coated film obtained by the composition of the present invention is 0.1 to 5 탆. 1-3 micrometers is preferable from a viewpoint of cushioning property, anti-scratching property, and applicability | paintability.

In addition, in the method of coating the substrate by applying the coating composition of the present invention to the substrate, the order of mixing the coating composition may be selected to (I) or (II).

According to the step (I), the first coating composition stored in the step I-1, in which the silicone oil, the solvent, and the first catalyst are mixed to prepare and store the first coating composition, and the coating composition is coated on the substrate. The second catalyst may be mixed into a step I-2 to prepare a second coating composition, and step I-3 to apply the second coating composition on a substrate. Here, the coating imparting agent or the compound represented by the formula (4) may be put in step I-1 or in step I-2.

Alternatively, according to the step (II), in the step II-1 of mixing the silicone oil, the solvent, and the second catalyst to prepare and store the first coating composition, when coating the coating composition on the substrate, the first stored Mixing the first catalyst to the coating composition may be divided into step II-2 to prepare a second coating composition, and step II-3 to apply the second coating composition on a substrate. The coating imparting agent or the compound represented by the formula (4) may be added to step II-1 or may be added to step II-2.

When preparing the coating composition, a mixture of a silicone oil, a solvent, and a coating imparting agent may be stored, and a coating composition may be used by adding a first catalyst or a second catalyst when coating is required. However, when storing a mixture of a silicone oil, a solvent, and a coating agent, even when only one of the first catalyst and the second catalyst is stored, the mixture is very hard to cure even if it takes 7 days. It is because it is excellent in convenience to put any one of the catalyst at the time of coating because it is not made.

It is also preferable to coat in the air at the time of coating, but it is more preferable to coat in oxygen atmosphere. As for oxygen concentration atmosphere, 40-60 mass% is preferable. In the range there is an advantage that can shorten the curing time to 1 to 5 minutes.

When the cushioning imparting agent or the cushioning imparting agent and the compound represented by the formula (4) are mixed, when the coating composition is coated on the substrate, the coating layer is cured by dividing the component into an upper layer and a lower layer. Here, it may be divided into a lower layer which is a hard region and an upper layer which is a soft region, and the cushioning agent or cushioning property of the lower layer relative to the content of the cushioning agent or cushioning agent and the compound represented by the formula (4) of the upper layer. The weight ratio of the content of the imparting agent and the compound represented by the general formula (4) is preferably 1: 0.1 to 1: 0.3 in that it has resilience to scratches and scratch resistance.

Substrate that can be applied to the present invention may be any one selected from metal, glass, wood, ceramic, cement and the like. As a base material, it can be used in the body, wheels, and glass windows of automobiles, trains, airplanes, bicycles, motorcycles, etc., and is used for products used with water in interior and exterior materials of a house, toilet, kitchen, washroom, bathtub, etc. It may have excellent properties such as antifouling properties.

(Example 1)

60% by mass of silicon (MHX1107, Dow Corning), 32% by mass of anhydrous ethanol as a solvent, 1% by mass of the compound represented by the formula (1-1) as the first catalyst, and the compound represented by the formula (2) as the second catalyst ( Here, R1 to R3 are methyl groups, n1 = 1, n2 = 1) 1 mass%, and as a cushioning agent, 6 mass% of the formula (3) (where R1 and R2 are methyl groups, R3 and R4 are ethyl groups, n = 1) Mixed. Immediately after mixing, the coating composition generated bubbles and heat, and the glass was coated by spraying. After coating, the mixture was dried at room temperature for 20 minutes and subjected to a physical property test.

(Example 2)

60% by mass of silicon (MHX1107, Dow Corning), 32% by mass of anhydrous ethanol as a solvent, 1% by mass of the compound represented by the formula (1-1) as the first catalyst, and the compound represented by the formula (2) as the second catalyst ( Where R1 to R3 are methyl groups, n1 = 1, n2 = 1) 1 mass%, and as a cushioning imparting agent, formula (3) (where R1 and R2 are methyl groups, R3 and R4 are ethyl groups, n = 1) 3 mass%, As the additive 1, the formula (4) (wherein R are all ethyl groups) was mixed. Immediately after mixing, the coating composition generated bubbles and heat, and the glass was coated by spraying. After coating, the mixture was dried at room temperature for 20 minutes and subjected to a physical property test.

(Example 3)

60 mass% of silicone (MHX1107, Dow Corning), 32 mass% of anhydrous ethanol as a solvent, 1 mass% of the compound represented by general formula (1-1) as a 1st catalyst, and compound 1 represented by general formula (2) as a 2nd catalyst 3% by mass of formula (3) (wherein R1 and R2 are methyl groups, R3 and R4 are ethyl groups, n = 1) as cushioning agent, formula (4) as additive 2 (wherein octyl group and methoxy group Ratio of 1: 1) was mixed. Immediately after mixing, the coating composition generated bubbles and heat, and the glass was coated by spraying. After coating, the mixture was dried at room temperature for 20 minutes and subjected to a physical property test.

(Comparative Example 1)

60% by mass of silicon (MHX1107, Dow Corning), 38% by mass of anhydrous ethanol as a solvent, 1% by mass of the compound represented by the formula (1-1) as the first catalyst, and the compound represented by the formula (2) as the second catalyst ( Here, R1-R3 mixed the methyl group, n1 = 1, n2 = 1) 1 mass%. Immediately after mixing, the coating composition generated bubbles and heat, and the glass was coated by spraying. After coating, the mixture was dried at room temperature for 20 minutes and subjected to a physical property test.

Example 1 Example 2 Example 3 Comparative Example 1 ingredient Silicone oil 60 60 60 60 menstruum 32 32 32 38 First catalyst One One One One Second catalyst One One One One Cushioning agent 6 3 3 - Additive 1 - 3 - - Additive 2 - - 3 -

(Unit weight%)

The cushion test was carried out by pressing the upper part of the coating film with a ballpoint pen and checking whether there was a mark on the coating film after 3 days.

The coating property was determined whether the coating became uniform after coating the coating composition.

Examples 1 to 3 and Comparative Example 1 were subjected to a cushioning test and a coating uniformity test. The result is as follows.

Example 1 Example 2 Example 3 Comparative Example 1 Cushion usually good Very good Bad Coating good Very good Very good usually

In Examples 2 and 3, the coating property was the best, and the cushioning property was improved by adding the cushioning agent and the additive. By adding an appropriate amount of the cushioning agent and the compound represented by the formula (4), the marks appeared on the external impact, but it was confirmed that the marks on the coating disappeared over time.

Claims (8)

A silicone oil, a first catalyst having a glycidyl group, a second catalyst having an amino group, a compound represented by the following formula (3) as a cushioning imparting agent, a compound represented by the following formula (4), and a solvent,
The first catalyst having the glycidyl group is a compound represented by the following formula (1),

(Wherein R1 to R3 are each independently selected from methoxy, ethoxy, propoxy, and n represents an integer of 1 to 10).
The second catalyst having an amino group is a compound represented by the following formula (2),

(Wherein R1 to R3 are each independently selected from an alkyl group having 1 to 5 carbon atoms, an aryl group, -Cl, -F, and CH2F, and n1 and n2 independently represent an integer of 1 to 3).
The density of the first catalyst is 1.00 to 1.1 g / mL, Tb is 110 to 130 ℃,
The density of the second catalyst is 1.00 to 1.1 g / mL, Tb is 130 to 150 ℃,
40 to 70% by weight of the silicone oil, 0.5 to 2% by weight of the first catalyst having the glycidyl group, 0.5 to 2% by weight of the second catalyst having the amino group, 1 to 10% by weight of the compound represented by the following formula (3) %, The coating composition containing 1 to 10% by weight of the compound represented by the following formula (4), 20 to 45% by weight of the solvent.
Formula (3)

(Wherein R1 and R2 are each independently selected from an alkyl group having 1 to 3 carbon atoms, methoxy, ethoxy, propoxy, and R3 and R4 are each independently an alkyl group having 1 to 3 carbon atoms, CF _3- , CHF _2- , CH ₂ F-, or any one selected from a phenyl group, n represents an integer of 1 to 5.)
Formula (4)

Wherein R is an alkyl group and an alkoxy group, wherein said alkyl group is C8H17- and said alkoxy group is CH3O- delete delete delete delete A method for forming a coating layer by coating the coating composition of claim 1 on a substrate. The method according to claim 6,
The coating layer is a method for forming a coating layer on a substrate with a coating composition, characterized in that formed by dividing into an upper layer and a lower layer. The method according to claim 7,
The ratio of the content of the cushioning imparting agent of the lower layer to the content of the cushioning imparting agent of the upper layer is 1: 0.1 to 1: 0.3 method for forming a coating layer on a substrate with a coating composition.