KR20160073484A - Coating compositions for forming film comprising silicone emulsions - Google Patents
Coating compositions for forming film comprising silicone emulsionsInfo
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- KR20160073484A KR20160073484A KR1020140181626A KR20140181626A KR20160073484A KR 20160073484 A KR20160073484 A KR 20160073484A KR 1020140181626 A KR1020140181626 A KR 1020140181626A KR 20140181626 A KR20140181626 A KR 20140181626A KR 20160073484 A KR20160073484 A KR 20160073484A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/022—Emulsions, e.g. oil in water
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2203/00—Other substrates
- B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
- B05D2203/35—Glass
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention provides a coating composition for forming a film which imparts water repellency and gloss to surfaces such as a metal coating surface and a glass surface. The coating composition of the present invention is a water-based composition which is safe for human body and can easily and easily form a coating on the surface, which not only facilitates the construction but also forms a film excellent in water repellency, water repellency and gloss.
Description
The present invention relates to a coating composition for forming a film which imparts water repellency and gloss to surfaces such as a metal coating surface and a glass surface.
Automotive paint surfaces are easily contaminated by dust, rain, and combustion additives (eg, exhaust gases). In order to prevent such contamination, the automobile body is coated with wax to form a wax coating, thereby preventing contamination of the body.
By water-repellent treatment of the surface of the paint surface, when water in the rain or car wash process touches the paint surface, water droplets are formed and fall down to the surface, so that the contaminants in the water (water used for car washing) adhere to the surface, And the wax coating makes it difficult for the contaminant component to adhere to the surface of the body, and even if the contaminant component adheres to the surface, it can be easily washed with water.
However, the effect of the water-repellent treatment by the conventional water-repellent wax can not be said to be successful, and even when sufficient water-repellent treatment is initially performed, the effect does not last long and does not exhibit sufficient water-repellent and antifouling effect for a long time. In addition, the conventional hydrophobic coating imparts hydrophobicity only temporarily or in a short time, so that it is difficult to expect the hydrophobic effect to be sufficiently persistent, and the hydraulic force (contact angle) at the surface of the hydrophobic coating is mostly in the range of 95-98 degrees . The reason for this is that the wax and silicon type raw materials used to impart water repellency have poor adhesion to the coating surface and the contact angles of these materials show about 95-97 degrees on the coating surface. Also, the coating is easily removed due to rain or washing.
Also, as a method for imparting water repellency to the exterior of automobiles, a method has been widely used in which a water repellent agent obtained by mixing a silicone compound with an oil repellent agent is coated on a painted surface and cured for a certain period of time. However, due to exposure of a large amount of organic solvent which may be harmful to human body, the above-mentioned construction method has a problem that it must be ventilated during construction, and a curing time is required for a certain period of time.
Numerous papers and patent documents are referenced and cited throughout this specification. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety to better understand the state of the art to which the present invention pertains and the content of the present invention.
The present inventors have made efforts to develop a water-based automotive surface coating composition which is excellent in water repellency and gloss and can be easily applied. As a result, it has been found that a coating composition comprising a silicone emulsion, a volatile solvent and water is prepared, and that the composition exhibits excellent physical properties in terms of water repellency, gloss increasing ability and water retentivity (washing durability) .
Accordingly, an object of the present invention is to provide a coating composition which forms a coating on a surface.
Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.
According to one aspect of the present invention, there is provided a coating composition for forming a coating on a surface comprising a silicone emulsion, a volatile solvent and water.
The present inventors have made efforts to develop a water-based automotive surface coating composition which is excellent in water repellency and gloss and can be easily applied. As a result, a coating composition including a silicone emulsion, a volatile solvent and water was prepared, and it was confirmed that the composition exhibited excellent physical properties in terms of water repellency, gloss increasing ability, and water retentivity (cleaning durability).
The composition of the present invention includes a silicone emulsion prepared by dispersing (emulsifying) silicon in water using a surfactant.
According to one embodiment of the present invention, the silicone emulsion is contained in an amount of 0.1-10 wt% based on the total weight of the composition. According to one particular example, the silicone emulsion is included in an amount of 1-10%, 2-10% or 3-10% by weight based on the total weight of the composition.
According to one embodiment of the present invention, the silicone emulsion is selected from the group consisting of polydimethylsiloxane emulsions, alkyl modified polydimethylsiloxane emulsions, amine modified polydimethylsiloxane emulsions, MQ resin emulsions, and combinations thereof.
Composition of a polydimethylsiloxane of the silicone emulsion is CH 3 [Si (CH 3) 2 O] n Si (CH 3) 3 is represented by (n is an integer of 1 or more), alkyl-modified polydimethylsiloxane is Si (CH 3 ) 3 O [SiRCH 3 O] n Si (CH 3 ) 3 wherein R is C 4-12 alkyl and n is an integer of 1 or more, and the amine-modified polydimethylsiloxane is represented by NH 2 Si (CH 3 ) 2 O [ Si (CH 3 ) 2 O] n Si (CH 3 ) 2 NH 2 (n is an integer of 1 or more).
According to one embodiment of the present invention, the alkyl of the alkyl-modified polydimethylsiloxane is C 4-11 , C 4-10 , C 4-9 , C 4-8 , C 4-7 or C 4-6 .
According to one embodiment of the present invention, the silicone emulsion is a combination of an MQ resin emulsion and a polydimethylsiloxane emulsion. The coating compositions (Preparation Examples 3 and 6) containing the MQ resin emulsion and the polydimethylsiloxane emulsion as silicone emulsions exhibited excellent water repellency and gloss enhancement (see Table 1), as confirmed by the following experimental examples.
According to one particular example, the combination of the MQ resin emulsion and the polydimethylsiloxane emulsion comprises 2-10 wt%, 3-10 wt%, 3-8 wt%, or 3-6 wt%, based on the total weight of the composition .
According to one embodiment of the invention, the silicone emulsion is a combination of an alkyl modified polydimethylsiloxane emulsion and an MQ resin emulsion. As shown in the following Experimental Example, the coating composition (Preparation Example 2) containing an alkyl-modified polydimethylsiloxane emulsion and an MQ resin emulsion as a silicone emulsion exhibited excellent water repellency and gloss enhancement (see Table 1).
According to one particular example, the combination of the alkyl-modified polydimethylsiloxane emulsion and the MQ resin emulsion comprises 4-10 wt%, 5-10 wt%, or 5-8 wt%, based on the total weight of the composition.
According to one embodiment of the invention, the silicone emulsion is a combination of an amine-modified polydimethylsiloxane emulsion or an amine-modified polydimethylsiloxane emulsion and an alkyl-modified polydimethylsiloxane emulsion. The coating compositions (Preparation Examples 1 and 5) comprising an amine-modified polydimethylsiloxane emulsion alone or an amine-modified polydimethylsiloxane emulsion and an alkyl-modified polydimethylsiloxane emulsion as silicone emulsions (Preparation Examples 1 and 5) (See Table 1).
According to one particular example, the amine-modified polydimethylsiloxane emulsion is included in an amount of 2-10 wt%, 3-10 wt%, 3-8 wt%, or 3-6 wt% based on the total weight of the composition.
According to one particular example, the combination of the amine-modified polydimethylsiloxane emulsion and the alkyl-modified polydimethylsiloxane emulsion is 2-10 wt%, 3-10 wt%, 3-8 wt%, or 3-6 wt% By weight.
The volatile solvent to be contained in the composition of the present invention includes, for example, alcohols (methanol, ethanol, propanol, butanol, pentanol, hexanol and mixed solvents thereof); Aromatic hydrocarbons such as benzene, toluene, ethylbenzene, chlorobenzene, o-xylene, m-xylene, p-xylene, styrene, isopropylbenzene, n-propylbenzene, chlorotoluene, butylbenzene, dichlorobenzene, Propylbenzene, nitrotoluene, mixed solvents thereof, etc.); Aliphatic hydrocarbons such as pentane, hexane, octane, nonane, decane, decalin, undecane, dodecane, tridecane, tetradecane, isononane, isodecane, isodecane, isododecane, isotridecane, isotetradecane, Nonane, cyclodecane, cyclododecane, cyclododecane, cyclotridecane, cyclotetradecane, mixed solvent thereof, etc.); Examples of the solvent include halogenated hydrocarbons such as chloroform, dichloromethane and mixed solvents thereof, esters such as benzyl acetate, allyl hexanoate, butyl butyrate, ethyl acetate, ethyl butyrate, ethylhexanoate, ethyl cinanoate, ethylheptanoate, Nanoate, ethyl pentanoate, isobutyl acetate, isobutyl formate, isoamyl acetate, isopropyl acetate, methylphenyl acetate and mixed solvents thereof); Ketones (such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and mixed solvents thereof); And solvents such as ethers (diethyl ether, dimethoxyethane, dimethoxy methane, dioxane, tetrahydrofuran, anisole, crown ether, mono- or polyethylene glycol, and mixed solvents thereof).
According to one embodiment of the present invention, the volatile solvent is alcohol.
According to one embodiment of the present invention, the volatile solvent is contained in an amount of 0.5-10% by weight based on the total weight of the composition. According to one particular example, the content of said volatile solvent is 2-8% by weight.
According to one embodiment of the present invention, the water is included in an amount of 70-99% by weight based on the total weight of the composition. According to one particular example, the content of water is 75-95% by weight or 80-93% by weight.
The coating composition of the present invention can be applied to various surfaces (for example, metal coating surfaces such as automobiles and motorcycles, glass surfaces, etc.) to form coatings, (Antifouling composition) and the like can be exerted.
According to one embodiment of the present invention, the coating formed by the coating composition of the present invention exhibits a contact angle of 100-105 degrees. According to one particular example, the coating composition of the present invention is a super water repellent coating composition exhibiting a contact angle of 103-105 degrees.
The composition of the present invention may further contain other additives such as fragrance, dispersant, preservative and the like in addition to the above components.
The features and advantages of the present invention are summarized as follows:
(I) The present invention provides a coating composition for forming a film which imparts water repellency and gloss to surfaces such as a metallic coating surface and a glass surface.
(Ii) The coating composition of the present invention is a water-based composition which is safe to human body and can easily and easily form a coating on the surface, thereby facilitating the formation of a coating film with excellent water repellency, water repellency and gloss.
Figure 1 shows the change in contact angle (water repellency) with the number of rinsing times.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .
Example
Production Example 1. Preparation of aqueous liquid phase coating composition 1
The main reaction vessel was charged with 91.4 wt% purified water, 1.4 wt% silicone emulsion (X-52-8048, alkyl modified polydimethylsiloxane emulsion, Shinetsu Japan) and 2 wt% silicone emulsion (E125, amine denatured polydimethylsiloxane emulsion, Bluestar) Followed by stirring at room temperature (20 ° C) using a stirrer, followed by stirring at 300 rpm for 20 minutes. 0.2 wt% of volatile solvent (ethanol 5 wt%) and other adjuvant (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and then charged into the main reaction vessel. The final mixed solution was stirred for 30 minutes using a stirrer at 300 rpm for 10 minutes to obtain a milky liquid (yield: 99%).
Production Example 2. Preparation of aqueous liquid phase coating composition
1.4 wt% of silicone emulsion (X-52-8048, alkyl-modified polydimethylsiloxane emulsion, Shinetsu Japan) and silicone emulsion (X-51-1302M, MQ resin emulsion, Shinetsu Japan) 4.5 wt% of purified water distilled water wt%, and the mixture was stirred at room temperature (20 ° C) using a stirrer, followed by stirring at 300 rpm for 20 minutes. 0.2 wt% of a volatile solvent (ethanol 5 wt%) and other auxiliaries (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and a milky liquid was obtained in the same manner as in Preparation Example 1 Yield 99%).
Preparation Example 3. Preparation of aqueous liquid phase coating composition
1.5 wt% of silicone emulsion (SI4002Z, polydimethylsiloxane emulsion, KCC) and 2 wt% of silicone emulsion (X-51-1302M, MQ resin emulsion, Shinetsu Japan) were added to the main reaction vessel at room temperature 20 ° C) using a stirrer, and then agitated at 300 rpm for 20 minutes. 0.2 wt% of a volatile solvent (ethanol 5 wt%) and other auxiliaries (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and a milky liquid was obtained in the same manner as in Preparation Example 1 Yield 99%).
Production Example 4. Preparation of aqueous liquid phase coating composition
(X-51-1309, amine-modified polydimethylsiloxane emulsion, Shinetsu Japan) 1.4 wt% and silicone emulsion (X-51-1302M, MQ resin emulsion, Shinetsu Japan) 2 wt%, and the mixture was stirred at room temperature (20 ° C) using a stirrer, followed by stirring at 300 rpm for 20 minutes. 0.2 wt% of a volatile solvent (ethanol 5 wt%) and other auxiliaries (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and a milky liquid was obtained in the same manner as in Preparation Example 1 Yield 99%).
Preparation Example 5. Preparation of aqueous liquid phase coating composition
The main reaction vessel was charged with 91.4 wt% purified water, 1.4 wt% silicone emulsion (X-51-1309, amine modified polydimethylsiloxane emulsion, Shinetsu Japan) and 2 wt% silicone emulsion (E125, amine denatured polydimethylsiloxane, Bluestar) The mixture was stirred at room temperature (20 ° C) using a stirrer, and then stirred at 300 rpm for 20 minutes. 0.2 wt% of a volatile solvent (ethanol 5 wt%) and other auxiliaries (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and a milky liquid was obtained in the same manner as in Preparation Example 1 Yield 99%).
Preparation Example 6. Preparation of aqueous liquid phase coating composition
1 wt% of silicone emulsion (KM9717, MQ resin emulsion, Shinetsu Japan), 1 wt% of silicone emulsion (X-51-1302M, MQ resin emulsion, Shinetsu Japan) and silicone emulsion (KMK740 , Polydimethylsiloxane emulsion, Shinetsu Korea) was added thereto, followed by stirring at room temperature (20 ° C) using a stirrer, followed by stirring at 300 rpm for 20 minutes. 0.2 wt% of a volatile solvent (ethanol 5 wt%) and other auxiliaries (preservative) were added to the auxiliary container, and the mixture was stirred at 300 rpm for 10 minutes using a stirrer, and a milky liquid was obtained in the same manner as in Preparation Example 1 Yield 99%).
Experimental Example 1. Evaluation of hydraulic force and gloss increase
The hydraulic powers of the coating compositions prepared in Preparation Examples 1 to 6 were compared and shown in Table 1. For the hydrostatic force, 1 g of each composition was applied to a 10 * 8 cm 2 coating sample of Preparation Examples 1 to 6, and then wiped evenly using a dedicated microfiber, followed by washing with water having a constant flow rate for 5 seconds Direct hydraulic power was measured. Further, in order to confirm the gloss improvement of the coating compositions of Production Examples 1 to 6, specimen preparation and measurement were carried out as follows.
The measurement results are shown in Table 1.
<Preparation of Psalter>
3 g of celite which was diluted with 10 wt% of water, which was 0.8 mm in width, 75 mm in width and 155 mm in height, was sampled on the abrasive paper and rubbed so that the gloss of the steel sheet fell to 60. After polishing, the remaining celite was thoroughly washed with water and fused, and then completely dried to prepare a specimen. The initial glossiness was measured on the specimens prepared above, and about 1 g of the coating composition of Production Examples 1 to 6 was applied to the entire steel sheet, followed by coating with a dedicated microfiber, followed by washing with water having a constant flow rate for 5 seconds, Respectively.
In the above table,
◎: water hydraulic force of 104 degrees or more, spreadability is excellent,
○: Water hydraulic force of 100 degrees or more and 104 degrees or less, excellent spreadability,
△: Water repellency is 100 degrees or less and spreadability is low.
As shown in Table 1, the coating compositions of Preparation Examples 2 and 6 exhibited excellent water repellency and gloss enhancement, and exhibited excellent water repellency and workability at the same time. Next, the coating compositions of Preparation Examples 1, 3 and 5 showed lower water repellency than the compositions of Preparation Examples 2 and 6, but exhibited a good level of water repellency with a contact angle of 100-101 degrees. The coating composition of Preparation Example 4 exhibited relatively low water repellency and gloss improvement as compared with the compositions of other preparations (Table 1).
Experimental Example 2. Evaluation of durability (water repellency)
The cleaning durability of the coating compositions prepared in Preparation Examples 1 to 6 was evaluated and shown in Table 2 and Fig. For the evaluation of durability for cleaning, coating compositions of Preparation Examples 1 to 6 were applied to coating samples each having a size of 10 * 8 cm 2 in an amount of 1 g per each solution, wiped evenly using a dedicated microfiber, And then mounted on a Gardner machine. The durability test conditions were as follows: After the urethane sponge was wiped, the specimen was soaked in 10% diluted detergent, washed 100 times at a speed of 40 reciprocations per minute, washed for 5 seconds with constant flow rate of water, Respectively. The contact angle of 90 degrees was judged to be the end of the hydraulic power.
As shown in Table 2 and Fig. 1, the coating compositions of Preparation Examples 2 and 6 were excellent in durability against washing, and thus remained hydrolyzable even after long cleaning.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140181626A KR20160073484A (en) | 2014-12-16 | 2014-12-16 | Coating compositions for forming film comprising silicone emulsions |
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| KR1020140181626A KR20160073484A (en) | 2014-12-16 | 2014-12-16 | Coating compositions for forming film comprising silicone emulsions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023086611A1 (en) * | 2021-11-12 | 2023-05-19 | Energizer Auto, Inc. | Surface gloss compositions and methods of use thereof |
| EP4139378A4 (en) * | 2020-04-21 | 2024-06-19 | Energizer Auto, Inc. | Rapid hydrophobic surface modification compositions and methods of use thereof |
-
2014
- 2014-12-16 KR KR1020140181626A patent/KR20160073484A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4139378A4 (en) * | 2020-04-21 | 2024-06-19 | Energizer Auto, Inc. | Rapid hydrophobic surface modification compositions and methods of use thereof |
| WO2023086611A1 (en) * | 2021-11-12 | 2023-05-19 | Energizer Auto, Inc. | Surface gloss compositions and methods of use thereof |
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