• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a naturally-dried fluorine-based coating composition, and more particularly, to a coating composition composed of a resin, a crosslinking agent, an inorganic pigment, and an additive, using a fluorine-based resin as a resin and a non-yellowing polyisocyanate-based compound as a curing agent at room temperature. The present invention relates to a naturally-dried fluorine-based coating composition which is curable and exhibits excellent coating properties by being painted on concrete and mortar surfaces in building exterior materials, civil engineering, and construction.
    公开号:KR19980059114A
    申请号:KR1019960078450
    申请日:1996-12-30
    公开日:1998-10-07
    发明作者:진창일；이진형
    申请人:김충세；고려화학 주식회사；
    IPC主号:
    专利说明:

    Natural drying type fluorine coating composition
    The present invention relates to a naturally-dried fluorine-based coating composition, and more particularly, to a coating composition composed of a resin, a crosslinking agent, an inorganic pigment, and an additive, using a fluorine-based resin as a resin and a non-yellowing polyisocyanate-based compound as a curing agent at room temperature. The present invention relates to a naturally-dried fluorine-based coating composition which is curable and exhibits excellent coating properties by being painted on concrete and mortar surfaces in building exterior materials, civil engineering, and construction.
    The coating composition refers to a paint composition coated on an inorganic material such as an inner wall of a building, a tunnel, and an underground roadway, that is, concrete or mortar. In the past, excellent weather resistance was required for exterior materials for construction, but recently, new functions for non-pollution such as continuous maintenance, cleanliness, economic feasibility, and constructability of the building from the pollution and various pollution of the surrounding environment due to air pollution A film composition having both is required.
    The inventors of the present invention have tried to solve the problem of poor fouling resistance despite the excellent weatherability of the conventional coating composition. As a result, the present invention improves durability and non-pollution properties, especially under the composition according to the specific mixing design with fluorine-based resins, isocyanate-based curing agents and other additives by using a pollution-resistant mechanism of contaminants and non-contaminants. It is an object of the present invention to provide a new fluorine-based coating composition which can be easily removed by contaminants and impart wear resistance of the coating film to maintain the properties of the coating composition for a long time after removal of the contaminants.
    The present invention is a coating composition composed of a resin, a curing agent, a curing catalyst, a pigment, and other additives, wherein the molecular weight is 2,000 to 100,000, the hydroxyl value is 70 to 150 mgKOH / g-resin, and the fluorine content is 20 to 30%. It is characterized by a naturally-dried fluorine-based coating composition in which the resin is contained in an amount of 30 to 60% by weight based on the total coating composition.
    Referring to the present invention in more detail as follows.
    The fluorine-based coating composition according to the present invention contains a fluorine-based resin, an isocyanate-based curing agent, a curing catalyst, a pigment, a solvent, and other additives. The fluorine-based coating composition contains a fluorine-based resin and a fluorine-based curing agent to improve durability and stain resistance and to facilitate the cleaning of contaminants. .
    The fluorine resin used in the present invention is a resin obtained by copolymerizing a fluoro monomer and a hydrocarbon monomer, and particularly preferably a chlorotrifluoroethylene or tetrafluoroethylene resin. Such fluorine resins improve pigment dispersion and adhesion to substrates, and improve fluorine content and glass transition temperature (Tg) and crosslinking density (crossing linking density) of the coating film while maintaining the excellent weatherability of the existing fluorine resin paint. It plays a role of improving various physical properties such as non-pollution.
    In the present invention, a fluorine-based resin having a molecular weight of 2,000 to 100,000, a fluorine content of 20 to 30%, and an active hydroxyl value of 70 to 150 mgKOH / g-resin (solid content basis) is used. At this time, if the molecular weight of the used fluorine-based resin is less than 2,000, poor adhesion occurs due to an increase in the degree of curing, and if it exceeds 100,000, there is a problem that the curing is delayed. If the active hydroxyl value of the resin is less than 70 mgKOH / g-resin, the resulting crosslinking density of the coating film is lowered, the flexibility and cold resistance of the coating film is good, but there is a problem of poor chemical resistance and fouling resistance, 150mgKOH Excess / g-resin increases the crosslinking density of the coating film, resulting in a dense coating structure resulting in good fouling resistance and chemical resistance, but due to cold shock cycle and thermal shock due to rapid temperature change due to the difference of internal stress The problem that coating film properties, such as a brittle phenomenon and impact resistance of a coating film, fall largely arises. It is preferable that the fluorine-based resin is contained in an amount of 30 to 60% by weight based on the total coating composition. If the content of the fluorine-based resin is less than 30% by weight, the film formation and general properties of the film are deteriorated. It may result in deterioration of film formation.
    In the present invention, by selecting the fluorine-based resin designing the composition to exhibit the fouling-resistant properties to play a role of minimizing the force to attach the contaminants. Contamination is removed by natural external conditions such as rainwater, whereas there is almost no decontamination factor in internal sidewalls such as tunnels and underground roads. Will be performed. Therefore, in the present invention, in order to impart wear resistance and slip resistance to the external physical decontamination work, a separate fluorine compound may be contained within a range of less than 5 wt% with respect to the entire coating composition. As the fluorine-based compound, polytetrafluoroethylene-based wax powder is used, and when mixed with other organic wax-based compounds, better results can be obtained than those used alone. If the content of such a fluorine-based compound exceeds 5% by weight, there is a possibility that the existing physical properties may be lowered, such as glossiness.
    In this invention, the isocyanate type compound used for the purpose of room temperature hardening is contained as a hardening | curing agent. The isocyanate group of the curing agent reacts with the hydroxyl group of the fluorine-based resin to improve yellowing resistance and light resistance. In the present invention, one or more selected from hexamethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate, dimethylmethane diisocyanate, hydrogenated dimethylmethane diisocyanate, 2,2,4-trimethyl-1,6-hexanediisocyanate and hydrogenated xylene diisocyanate; Two or more mixtures are applied. Such a curing agent is preferably contained 5 to 20% by weight based on the total coating composition, if the content is less than 5% by weight of the coating film properties are greatly reduced due to poor crosslinking, durability is not guaranteed, if the content exceeds 20% by weight of the coating film This phenomenon is undesirable because it occurs.
    In addition, the present invention can contain a curing catalyst for the purpose of shortening the coating film drying and curing time, which is used in a small amount in the range of 0.001 to 0.01 wt% based on the total solid content. As the curing catalyst, one selected from tetramethylbutanediamine, bicyclooctane, dibutyltin dilaurate, tin octoate, aluminum triacetylacetonate, cobalt diacetylacetonate, zirconium tetraacetylacetate and zinc diacetylacetonate Or 2 or more types can be used.
    In addition, in the present invention, by imparting a color by containing a ceramic pigment in the coating composition gives a chemical resistance to improve the durability. It is preferable to use less than 40% by weight of the pigment relative to the total coating composition, the use of more than this amount is difficult to form a coating film may cause a decrease in physical properties and poor paint storage properties.
    The solvent used in the present invention is a single solvent or two or more types of mixed solvents selected from xylene, butyl acetate, ketones, and the like, which are contained in the range of 10 to 30% by weight based on the total coating composition. If the amount of the solvent is small, it is difficult to expect each characteristic. If the amount is too large, there is a problem of deterioration of adhesion or durability in overall physical properties. In addition, the diluent is used to maintain the thickness of the coating film and to improve the painting workability can be used by selecting one or more solvents of butyl acetate, xylene, ketones.
    In the coating composition according to the present invention, the glass transition temperature (Tg) of the coating film was 70 ° C. or higher using a fluorine-based resin and a polyisocyanate-based curing agent. When the glass transition temperature is lower than this, deterioration of physical properties occurs in contaminants, especially carbon contamination. It becomes unfavorable for fouling resistance, which is the main function of the present invention.
    As described above, the fluorine-based coating composition prepared and blended according to the present invention is applied to building exterior materials, tunnel interiors and inner walls of underground roadways, and has excellent non-pollution properties without any physical properties such as durability compared to those of conventional fluorine resin coating materials. There is an effect of improving the ease of cleaning of contamination.
    Hereinafter, the present invention will be described in detail with reference to the following Examples, which are not intended to limit the scope of the present invention.
    Example: Preparation of Film Composition
    20 g of fluorine-based resin (LUMIFRON 9100, Japan Asahi Glass Co., Ltd., 65 wt% solids, hydroxyl group 100 (based on solids)) was charged with 3 g of butyl acetate and 7 g of xylene, followed by stirring for 10 minutes at 1000 rpm with a general stirrer.
    To this stirred solution, 0.2 g of Benton and 2 g of polytetrafluoroethylene powder, a fluorine-based wax, were added to the stirred solution and stirred for 10 minutes. Then, 25 g of titanium dioxide (TiO 2 ) was added thereto, followed by stirring. Dispersion is carried out so that the dispersed particle size is 5 탆 or less. 30 g of the same fluorine resin, 0.02 g of dibutyltin dilaurate, and 9 g of xylene were added to the dispersed mill base, followed by stirring for 30 minutes to prepare a first composition (topic).
    Separately, 33 g of hexamethylene diisocyanate type resin (NPI, coronate HX) was added to a mixed solvent of butyl acetate and xylene (50/50 by volume) and stirred at 1000 rpm for 10 minutes to prepare a cured resin as a second composition.
    The first composition (topic) and the second composition (curing agent) thus obtained are mixed in a weight ratio of 85:15 to prepare a desired fluorine-based coating composition.
    Comparative Example 1
    Instead of the fluorine-based resin (Lumiflon, 9100) used as the mill base resin in the above embodiment, a fluorine-free fluorine-based resin (LC 930, Daikin Corporation) was added in the same amount (based on a resin solid content) to prepare the first composition. To produce the same.
    The prepared paint is coated without a second composition (curing agent) to prepare a fluorine coating composition.
    Comparative Example 2
    Instead of the fluorine-based resin used in the above embodiment, a fluorine-based resin (Lumiflon, 200) having a hydroxyl value of 50 or less was replaced with the same amount (based on a resin solid content), and other processes were carried out in the same manner as in the above embodiment.
    Test Example
    The coating compositions prepared in Examples and Comparative Examples 1 and 2 were coated under the following coating conditions, and then tested for appearance, adhesion, fouling (magic, carbon), chemical resistance (sulfuric acid), and outdoor exposure. The results are shown in Table 1 below.
    [Painting conditions and painting system]
    Dilution: Use 20-30% by weight of butyl acetate, xylene, methyl ethyl ketone mixed solvent and adjust the viscosity to 18-20 seconds.
    · Coating System As the coating material, concrete or mortar is used, and night light is selected to facilitate the test.
    ① Undercoat: Apply 50㎛ of two-component epoxy primer.
    ② Medium: 500㎛ two-component epoxy putty.
    ③ Medium: Apply 50㎛ two-component epoxy sealer.
    ④ Top coat: The fluorine paint prepared in Examples and Comparative Examples 1 and 2 is coated twice with 25 μm.
    [Test Methods]
    · Adhesiveness: Using a razor, draw 5 mm intervals to reach the surface of the test specimen and make 25 scales and observe the peeling state when the cellophane tape of KS-A 1528 standard was pressed sufficiently and pulled in 90 ° direction. .
    · Pollution: Observed by dividing magic pollution and carbon pollution, the test method is as follows. Magic pollution is contaminated using magic and washed with alcohol using cotton to observe the decontamination. Carbon contaminants are prepared by preparing a carbon black pigment solution to contaminate the coating film, and then dried in a 60 ° C. drying furnace for 30 minutes and washed with water to observe decontamination properties.
    Chemical resistance: 10% sulfuric acid (H 2 SO 4 ) solution after spot test at 20 ℃ for 1 week, observe the appearance and expose the test specimen to the side of the highway or tunnel inner wall where contamination is severe Observe by comparison.
    · Weathering resistance: Observe after 2,000 hours of W-O-M exposure and 2,000 hours of Q.U.V exposure.
    The fluorine-based coating composition according to the present invention exhibits excellent coating properties by being coated on concrete and mortar surfaces in building exterior materials, civil engineering, and construction fields, and has excellent superiority at room temperature curing.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] In coating compositions composed of resins, curing agents, curing catalysts, pigments and other additives, all fluorine-based resins having a molecular weight of 2,000 to 100,000, a hydroxyl value of 70 to 150 mgKOH / g-resin and a fluorine content of 20 to 30% Naturally dried fluorine-based coating composition, characterized in that contained in 30 to 60% by weight relative to the coating composition.
    [2" claim-type="Currently amended] The method of claim 1, wherein the fluorine-based resin is chlorotrifluoroethylene or tetrafluoroethylene-based resin, characterized in that the natural drying type fluorine-based coating composition.
    [3" claim-type="Currently amended] The method of claim 1, wherein the curing agent is selected from hexamethylene diisocyanate, xylene diisocyanate, hydrogenated dimethylmethane diisocyanate, isophorone diisocyanate, 2,2,4-trimethyl-1,6-hexanediisocyanate and hydrogenated xylene diisocyanate. Naturally dried fluorine-based coating composition, characterized in that one or more selected.
    [4" claim-type="Currently amended] 2. The naturally-dried fluorine-based coating composition according to claim 1, wherein the coating composition contains less than 5% by weight of polytetrafluoroethylene wax powder based on the total coating composition.
    [5" claim-type="Currently amended] The natural dry type fluorine-based coating composition according to claim 1, wherein the coating composition has a glass transition temperature of 70 ° C or higher.
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    同族专利:
    公开号 | 公开日
    KR100484291B1|2006-01-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-30|Application filed by 김충세, 고려화학 주식회사
    1996-12-30|Priority to KR1019960078450A
    1998-10-07|Publication of KR19980059114A
    2006-01-12|Application granted
    2006-01-12|Publication of KR100484291B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960078450A|KR100484291B1|1996-12-30|1996-12-30|Durable and non-polluting, natural dry fluorine membrane composition|
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