TW200920799A - Coating composition and article using the same - Google Patents

Abstract

To provide a coating composition which is excellent in water resistance, insulating properties and ultraviolet degradation resistance, and is also excellent in transparency of a coating film formed after coating.

Description

200920799 IX. Description of the invention: [Technical field to which the invention pertains] This disclosure relates to a coating composition and an article using the same. [Prior Art] A coating composition using a fluoropolymer is generally known and widely used due to properties such as water repellency. Japanese Laid-Open Publication No. 6-1 1 653 No. 1 describes a fluorine-containing polymer overcoat material for aqueous coating of a thin crucible for imparting water repellency to a building structure such as a roof, a balcony and a bathroom. The aqueous overcoat material is a composite waterproof layer comprising a water-repellent coating film layer comprising an aqueous dispersion solution (component A) based on a copolymer of vinyl acetate and a cement binder, and a component A, a fluoropolymer dispersion solution And a coating film layer of the pigment. Japanese Laid-Open Publication No. 57-34107 and No. 57-34108 describe a fluorine-containing copolymer which is soluble in an organic solvent for exhibiting water repellency in baking coating materials and other coating materials. f \ ^ In addition, Japanese Patent Publication No. 8-2 17993 describes a fluid-repellent coating material which contains particles of a low molecular weight tetrafluoroethylene resin and a binder resin, which are suitable for coating on automobile bodies and tableware. In addition, the present invention discloses an EL (electroluminescence) light-emitting element in which the light-emitting portion is sealed by a protective layer containing a gas-based monomer coated on the entire periphery of the light-emitting portion. A waterproof coating formed and a waterproof layer formed from a material sold under the trade name "TEFLON" or a polyfluorene tube. 134045.doc 200920799 On the other hand, Japanese Patent Publication No. 20034143-4 discloses an antireflection film comprising a transparent substrate and at least one single light scattering layer formed on the transparent substrate, which is not directly related to imparting water repellency Covering the composition. The present disclosure describes a light-scattering layer containing translucent fine particles and a translucent resin and having a difference in refractive index between the translucent fine particles and the translucent resin of 〇〇 2 or more. Big and 〇. 丨 5 or less. Polyethylene beads are also included as translucent fine particles and include bis(cardomethyl propylene sulfhydryl) sulfide as a translucent resin. The difference in refractive index can be adjusted to achieve a better light scattering angle.

The use of LEDs (light-emitting diodes) has gradually increased. For example, [ED has been increasingly used for illuminated traffic signal devices. Because these traffic signal devices have used a large and sturdy casing to maintain high water resistance, replacing the light bulbs and fluorescent lamps used in such devices with LEDs saves energy and reduces maintenance costs. The use of LEDs in automotive red taillights has also increased. While the LED itself is in the form of a carrier-type wafer in a light-emitting device, such as a traffic signal device, a large-sized pedestal is required to mount the LED wafer, and a large-sized transparent casing or cover layer is required to provide water repellency. Furthermore, it is expected that in the future, LEDs used in lighting devices such as highway lighting and exterior lighting can be turned on at night to achieve further energy savings. In view of such aspects and problems of the traffic signal device above, it is preferred to provide a durable, bulky, and waterproof light-emitting device such as a traffic signal device or an external lighting system. In addition, it is desirable to have the interior of the device transparent for subsequent repair after the device has been coated with the water-repellent coating composition. 134045.doc 200920799 To solve these problems, it is considered to seal the LED used as a light-emitting device with a waterproof coating material to impart waterproof function to the LED. However, conventional waterproof coating materials are insufficient in insulation and are resistant to ultraviolet degradation, which limits their use outdoors. SUMMARY OF THE INVENTION Accordingly, it is desirable to provide a coating composition having excellent water repellency, insulation, and resistance to ultraviolet degradation, which seals wiring, electrical contacts, and conductive portions of wires to provide a durable, bulky, and waterproof device. , such as a lighting device. The present disclosure includes the following aspects. In one embodiment, 'providing a coating composition comprising fluoropolymer A, fluoropolymer B and a solvent, wherein fluoropolymer A is soluble in a solvent, and fluoropolymer B is in the form of particles and is insoluble in a solvent. . In another embodiment, an article comprising an article and a coating formed from the coating composition is provided, wherein the coating composition is used to seal at least one electrically conductive portion of the article. As will be readily appreciated by the following description, "conductive portion" as used herein includes any electrical connection member used to construct the articles of the present disclosure. Examples of suitable electrical connections include, but are not limited to, electrical contacts such as electrical/electronic circuits, wires, flip chips, and bumps. In the present disclosure, an antenna is also referred to as a "conducting portion. In addition, a functional element as used herein includes optional components that can be actively or passively acted upon in electronic devices and other devices. Typical examples of functional devices include (but not Limited to light-emitting devices (such as LED chips), semiconductor elements 134045.doc 200920799 (such as 'ic (integrated circuit) wafers or LSI (lightening imaging sensors) wafers), capacitors (capacit〇r/ Condenser), reactor, inductor, and resistor.

In the case of sealing a conductive portion such as an electric/electronic circuit, an electric wiring, an electrical contact or a wire, a coating which can be easily formed into a sealing layer (hereinafter referred to as "coating" in the present disclosure) is provided. combination. The coating composition also imparts excellent water repellency, insulation and durability to the resulting sealed article, particularly against UV degradation, which is derived from the physical properties of the coating. In addition, the present disclosure contains emulsion polymer particles which are insoluble in the solvent and thus can be suitably modified without shortening the working life or even the dry seam coating composition. Therefore, it is easy to carry out the thick coating of the coating composition and a thick transparent coating film can be formed by a single coating operation. Further, the coating composition is easily prepared, for example, by dissolving a fluoropolymer in a solvent and dispersing the fluoropolymer (IV), and thus can be applied by a simple coating method such as brushing or dip coating. cover. Therefore, the coating composition is coated on a dielectric body having an irregular surface (for example, a circuit board including an LED chip on the surface or a semiconductor substrate including a wafer). The coating obtained by Sifeng has excellent water repellency, and the Bean P|Working Soil (7) is inferior, insulating and durable. A W 4 "Moon 匕 & , for example, outdoor advertising training, stationed in the straight led device, traffic

No. device, electroluminescent device, other electric device, 乂通L 雷, , ^ ', ,, Ming system and 爹 frost wire. These objects can maintain excellent characteristics for a long period of time between 134045.doc and 200920799 even when exposed and smeared with light or wind and rain. For example, it is considered that the items in this disclosure can be used continuously for about 1 year without Deterioration and damage of the features may occur. Of course, since the coating composition of the present disclosure contains a fluoropolymer as a substrate, it is possible to impart other good characteristics to the resulting article: such as excellent water repellency, insulation, and longevity (especially resistance) UV, line degradability and heat resistance and oil resistance or stain resistance. In addition, even if the object is not used in water, the object of this disclosure has excellent water resistance (Japanese Industrial Standard C0920 (corresponding to IEC6〇529) protection level 7 or higher grade (waterproof dip type): immersed in water in an amount sufficient to cause adverse effects, even immersed in 15 (: „1 to 1 m deep water for 3 〇 minutes has no effect) and therefore may be Used close to the conditions of use in water. For example, in the case of a light-emitting device requiring a direct current (Dc) power source (such as a device using an LED), and using (for example) Water resistance (ie, water resistance) is extremely important in light bulbs or fluorescent lamps that require an alternating current (AC) power source. Even in the case of an AC power source, even some of the insulating material is slightly damaged by water. In addition, in the case of a device using a DC power source, if the insulating material is damaged, it is feared that oxygen and hydrogen may be generated by water electrolysis. In addition, copper and lead may be generated. The wiring made of silver or silver for connection tends to be ionized and dissolved in water. However, since the coating composition of the present disclosure is excellent in water repellency, when the coating composition is coated on the LED and the resulting led When placed outdoors or placed in a place where the LED may be exposed to moisture (high humidity or where dew condensation may occur), the LED is not damaged and it will not become unusable because of durability, especially UV degradation. Sexually added to other objects of this feature 134045.doc 200920799 and parts thereof (in the case of cloth material surface, floor material table), so the future can be expected as a wood table Market expansion of paper surface, surface). Revealing provides a coating composition and an article (eg, coffee maker, various electrical devices and antennas) in which conductive parts (such as wiring, electrical contacts or wires) ) is sealed by coating with the coating composition.

In one embodiment, by dissolving a solvent-insoluble I polymer (gas-polymerized human particles in a coating substantially comprising a solvent-soluble compound (a solvent of a fluoropolymer in which pepper 3 is present) The composition is prepared in a composition. The term "solvent-soluble fluoropolymer" means that a mixture of solvates of solvent blood made of a fluoropolymer exhibits a stable, single and uniform liquid state in a macroscopic state. Fluoropolymer. Similarly, the term "solvent-insoluble fluoropolymer" means a fluoropolymer dispersed in a solvent. The difference between the refractive index of fluoropolymer VIII and the refractive index of fluoropolymer R is preferably less than 0.15. This is because it provides a clear coating. The fluoropolymer A used in the present disclosure can exhibit various features such as molecular structure and useful fluorine atoms contained in the molecule. For example, fluoropolymer A is essentially It is transparent and does not adversely affect light transmission. Gas polymer A also has specific characteristics of water repellency, insulation, durability (including UV degradation resistance, heat resistance and oil resistance (anti-pollution)). The fluoropolymer A of the present disclosure can be easily dissolved in a solvent and thus can be easily applied by coating. The fluoropolymer A and the solvent used in the present disclosure do not necessarily require heating to polymerize fluorine. The dissolution of the material not only significantly improves the handling properties, but also increases the range of use of the fluoropolymer A. In the prior art, 134,045.doc •10-200920799, it is necessary to use an additive (such as a reaction catalyst or Crosslinking (4) cross-linking structure to form a fluororesin coating to increase the film strength. However, in the present disclosure, it is not necessary to use an additive such as § Xuan, which can react to cross-link the gas polymer. In the embodiment, the fluoropolymer A is not particularly limited as long as it has the above-mentioned excellent characteristics and is also sufficiently exhibited in the obtained coating composition and article, and includes various fluorine-based resins and fluorine-based resins. In addition, the molecular weight of the fluoropolymer A can vary over a wide range, but is usually about 10,000 or more. When the molecular weight is less than 1 Torr, it is impossible to dry the coating composition. The resin film is then formed. The molecular weight of the a polymer A is preferably in the range of about 50,000 to 200, Å, and more preferably about 50,000 to 150,000. When the fluoropolymer a has a high molecular weight, it is more satisfactorily exhibited. The above characteristics. The molecular weight of fluoropolymer A means by ASTM D4001-93 (2006): Standard Test Method for

Determination of Weight-Average Molecular Weight of Polymers by Light Scattering. Fluoropolymer A includes partially fluorinated and perfluorinated polymers, including fluoroplastics and fluoroelastomers. Examples of fluoropolymer A of the present disclosure include, but are not limited to, FEVE (fluoroethylene-alkyl vinyl ether alternating copolymer) based fluoropolymer, PVDF (polyvinylidene fluoride) based fluoropolymer and based on Fluoropolymer of THV. These fluoropolymers may be used singly or in combination. The fluoropolymer based on FEVE is, for example, a fluorinated copolymer containing a dilute hydrocarbon, a cyclohexyl ether ether, an alkyl vinyl ether, and a hydroxyalkyl vinyl ether as a main component, wherein the copolymer can be partially fluorinated. Or perfluorinated. In such a 134,045.doc 200920799 copolymer, the content of olefin, cyclohexyl vinyl ether, alkyl vinyl ether and hydroxyalkyl vinyl ether is 40 to 60 mol% (mole%), 5 to 45 mol%, 3, respectively. To 15 mol% and 0 to 30 mol%. Perhalogenated olefins, trifluoroethylene or tetrafluoroethylene can be used as the olefin. An example of a fluoropolymer based on FEVE is a fluorine-containing copolymer containing a fluoroolefin, a cyclohexyl vinyl ether, and a glycidyl vinyl ether as a main component. The VDF-based fluoropolymer may be a rubber (elastomer) based fluoropolymer or plastic. When the VDF-based fluoropolymer is a rubber-based fluoropolymer, it includes, for example, vinylidene fluoride (VDF), a copolymer of tetrafluoroethylene (TFE) and propylene; and contains VDF and hexafluoropropylene (HFP). a fluororubber of a copolymer; and a fluororubber comprising a copolymer of VDF, HFP and TFE. When the VDF-based fluoropolymer is a plastic-based fluoropolymer, it includes, for example, a VDF polymer and a VDF-TFE copolymer. The fluoropolymer A may be a fluoropolymer containing at least HFP and VDF. Such fluoropolymers are typically binary fluoropolymers comprising HFP and VDF, or fluoropolymers comprising at least TFE, HFP and VDF, such as ternary fluoropolymers comprising the above monomers (e.g., THV). Among these THV-based fluoropolymers, some THV-based fluoropolymers are readily soluble in solvents and have excellent characteristics such as water repellency, insulation, and resistance to ultraviolet degradation. Further, the fluoropolymer can be coated on the uneven surface of the board by a simple method such as brushing or dip coating and the thicker coated film can be easily formed by multiple coatings. In the above binary or ternary fluoropolymer, the composition ratio of TFE, HFP and VDF in the fluoropolymer can be varied within a wide range. However, when a fluoropolymer is used for the purpose of sealing a article, a fluoropolymer having excellent fluidity, excellent 134045.doc -12-200920799, and low water permeability is required. Fluoropolymers having suitable crystallinity and a suitable melting point are also preferred for sealing articles. When a fluoropolymer is used for an LED, light transmission is also extremely important for maintaining the intensity of light emitted from the LED. In one embodiment, fluoropolymer A contains from about 36 to 72 wt/tw of TFE, from about 0 to 56 wt% of HFP, and from about 30 to 65 wt% of VDF. When the TFE content increases and deviates from this composition ratio, the resulting fluoropolymer becomes opaque and the transparency is lowered. The fluoropolymer A having a preferred composition ratio as disclosed above also has the advantage that it maintains chemical resistance similar to the chemical resistance of PTFE (polytetraethylene B: #), and has low substance penetration. Properties, about 30% crystallinity (which cannot be obtained from conventional fluororubber) and flexibility. When coated on a flexible circuit board, the fluoropolymer such as fluoropolymer A can be easily deformed with flexibility due to flexibility, and defects such as cracks do not occur. Therefore, it can be advantageously used to manufacture small electronic devices having complex component configurations. For reference only, a THV-based fluoropolymer containing about 36 to 72 wt% of TFE, about 0 to 56 wt/h of HFP, and about 8 to 45 wt% of VDF is compared with a conventional fluororesin, and Obtain the following results. Table 1 Features THV PTFE PFA FEP PVDF ETFE Excellent water resistance Excellent Excellent Excellent Excellent Excellent weatherability Excellent Excellent Excellent Excellent Excellent Excellent Transmittance Excellent Unqualified Good Excellent Excellent Excellent processability (melting point) Excellent unqualified pass qualified good (120-180°〇 (327°〇(290-310°〇(255-260°〇(160- 175°〇(260- 270°〇 adhesive) Excellent Qualified Qualified Good Good 134045.doc -13· 200920799 Note) Evaluation Criteria: Excellent> Good &Qualified> Unqualified PFA: Perfluoroalkoxy Ethylene FEP: Perfluoroethylene-propylene Copolymer PVDF : Polyvinylidene fluoride ETFE: Ethylene-tetrafluoroethylene ethene copolymer based on THV gas polymer can be obtained, for example, from Dyneon Co., Oakdale, MN under the trade name "DYNEON" THV 220, "DYNEONnTHV 415," DYNEON" THV 500 speaks. In the present disclosure, THV220 is especially useful for C and has the following characteristics: a melting point of 120 ° C, a glass transition temperature of 5 ° C, a flame retardancy V-0 (according to UL-94), Low moisture penetration and refractive index of 1.36. Coating composition contains solvent and appropriate amount The fluoropolymer A is dissolved in a solvent. The solvent is not particularly limited as long as the solvent can easily dissolve the fluoropolymer A without adversely affecting the characteristics of the resulting coating composition and article. The solvent is preferably based on a ketone. a solvent, an ester-based solvent, a furan-based solvent or a polar solvent. These solvents may be used singly or in combination. Suitable solvents (such as those in which a THV-based fluoropolymer is dissolved) ί : Examples include ketone-based Solvents, solvents based on S and polar solvents. Examples of ketone-based solvents include: acetone (dinonyl ketone), hydrazine (methyl ethyl ketone), diethyl ketone and hydrazine (methyl isobutyl) Examples of the ester-based solvent include decyl acetate, ethyl acetate, and butyl acetate. Examples of the furan-based solvent include THF (tetrahydrofuran). Examples of the polar solvent include hydrazine (fluorenyl-fluorenyl-2-pyrrolidine) Ketones. Examples of solvents suitable for dissolving PVDF-based fluoropolymers include: polar solvents such as hydrazine (hydrazine-methyl-2-pyrrolidone), DMAC (dimercaptopropyl 134045.doc -14-200920799 醯amine ), dmso (disulfoxide) and DMF (N,N-dimethylformamide); and butyl acetate, MIBK (mixture of methyl isobutyl and toluene. Dissolve fluoropolymer A) The amount of the fluoropolymer a in the above solvent may vary widely depending on the details of the fluoropolymer A, the solvent and the coating composition. The fluoropolymer A may be about 25 or less and preferably about 5 to 20 wt / by weight of the coating composition for removing the solvent-insoluble fluoropolymer (fluoropolymer B). The amount used. The fluoropolymer a is more preferably used in an amount of from about 1 Torr to about 15. When the amount of gas polymer A is less than! At wt%, a composition having a viscosity suitable for coating cannot be obtained and the coated film cannot exhibit various characteristics derived from the fluoropolymer. On the contrary, when the amount of the fluoropolymer A is more than 20% by weight, a composition having a viscosity suitable for coating cannot be obtained and only a composition having low strength and poor characteristics is obtained. In the coating composition of the present disclosure, a fluoropolymer which is granulated and insoluble in a solvent (fluoropolymer (1) is added and dispersed in fluoropolymer A and solvent = two: gas polymer B makes it possible to adjust the viscosity And the viscosity of the viscosity: enough to apply a thicker coating through a single coating operation. In addition, the coating is designed to achieve the optimum coating thickness and suitable drying time. Right increase without adding fluoropolymer 8 When the character is concentrated to achieve a thicker coating, the resulting one is added, but the viscosity of the resulting composition will increase rapidly and become more difficult to handle. Moreover, the dry weight of the fluoropolymer B particles will be too short. The amount of the human B particles is preferably Α 。 Α granule dry weight meter 'fluorine concentration ratio is too small,; == 15 〇 %. When the role of the carrier-added conjugate B is not exerted. , 134045.doc 200920799 When the percentage of fluoropolymer B is too large, voids may be formed due to insufficient amount of gas polymer A used as a continuous matrix after the coating composition is dried. Examples of fluoropolymer B include: PTFE-based Particles, thv-based particles, PFA-based particles, FEP-based particles, etfe-based particles, VDF-based particles, PCTFE (polytrifluoroethylene) based particles, and ECTFE (ethylene-chlorotrifluoroethylene copolymer) based particles and combinations thereof. The difference between the refractive index of A and the refractive index of fluoropolymer B is less than 0.15. The refractive index similarity between fluoropolymers A and B allows the coated enamel after drying of the coating composition to be transparent. The refractive index of the fluoropolymer A and the refractive index of the fluoropolymer 8 are not particularly limited, but in between

The difference is less than 〇, 15. For example, when fluoropolymer A is a THV-based polymer (refractive index is about 丨.36) and a large amount of PTFE particles (refractive index: 135) and TFE particles are added to a solution of fluoropolymer A and a solvent. A dry coating composition having good transparency can be achieved. The refractive index is measured by the IsS (10) PlaStiCS-Determinati〇n 〇f. Although the particle diameter of the fluoropolymer B is not particularly limited, it is usually U (translation). When the particle size is too small, it is difficult to easily obtain a thick coating. On the other hand, when the particle size is too large, it may be difficult to achieve transparency and smoothness of the film coating. The fluoropolymer B particles preferably have high transparency to be coated by the group. The coated film of the obtained material has transparency. Transparency can be obtained by reducing the particle size under the granules based on gauntlet. The laser particle size can be measured by the laser scattering method of -_1U999 VII G1. The coating composition of the invention includes at least three components, such as an I polymer (fluoropolymer A) dissolved in a solvent and a 134045.doc 200920799 2 compound (fluoropolymer B) insoluble in a solvent. Depending on the case, it may be used to generally apply frosting to the composition of the coating to help prepare or impart a preferred additive, including, for example, a surfactant, having a permeation: two test =, (four) dye, increase White agent, antioxidant and ultraviolet light = and optional additives are dissolved in the solvent and the polybatch B is added to the solution to prepare the water meter. The coating combination coating solution of the present invention has the desired viscosity. Abut, and thus can use conventional techniques (such as,

Coating, dip coating or spraying) is applied to the surface of the article. In some cases, the sealing portion may be formed by dropping a coating solution into a predetermined portion using a technique such as perfusion. Depending on the viscosity of the composition, the coating solution can be applied by a single or multiple coating operations. However, because the viscosity can be increased by adding fluorine. Material B is adjusted so that a thick coating can be achieved in a single coating operation. The single coating operation also reduces the opacity caused by the inclusion of air at the interface between the layers in the case of multiple coating operations. After the coating is completed, the resulting coated film is cured by drying. Drying can be carried out at ambient temperature and, if necessary, accelerated drying using a heater or oven. The thickness of the coated film after drying (i.e., the coating (or sealing layer) for coating the surface of the article) varies depending on the amount of the coating solution and the number of coatings. The coating thickness is typically at least about 10 μm (micrometers) and is, for example, about i pm or more. Since fluoropolymer particles (fluoropolymer B) are added to the coating set of the present disclosure, the thickness of the coating can be controlled to 〇. $ mm (mm) or more by a single coating operation. And especially 1 more. The coating composition of the present disclosure has remarkable characteristics such as light transmittance and /134045.doc -17-200920799 or diffusibility, water repellency, ultraviolet ~ 糸 疋 疋 及 及 及 及 及 及 及 及 。 。 。 。 。 。 。 。 。 。 。 。 。 。 this

The coating compositions of the disclosure can be used to coat various articles, for example, to form a coating: or a sealing layer. In particular, a coating or a seal can be formed on the conductive portion of the article. The coating composition of the present invention can be used to coat articles whereby the conductive portions included in the article are sealed. Since the exposed portion (circuit wiring, antenna, etc.) can be protected from moisture, ultraviolet light, or other surrounding adverse effects, the article including the conductive portion coated with the coating composition of the present disclosure can be stably maintained for a long period of time. Furthermore, the use of the coating compositions of the present disclosure also enables the reduction of articles, such as traffic signal devices, since sufficient water repellency can be achieved via the coating composition, eliminating the use of bulky casings, shields or the like. . The present invention also provides an article comprising an article having a conductive portion and a coating formed from the coating composition of the present disclosure wherein at least the conductive portion is sealed. The articles of the present disclosure may include various articles having conductive portions. Typical examples thereof include, but are not limited to: LED device 'where the LED component of the LED device and the conductive portion connected to the LED component are sealed by at least the coating of the present disclosure, the flexible circuit board (also referred to as a printed circuit board) a functional component mounted on a surface, wherein the functional component of the circuit board and the conductive portion connected to the functional component are at least sealed by the coating of the present disclosure, and the electronic component includes a functional component mounted therein. Wherein the functional component of the device and the electrically conductive portion coupled to the functional component are at least sealed by the coating of the present disclosure, the coated electrical wire wherein the exposed wire of the electrical wire is at least coated by the disclosure of 134045.doc -18-200920799 A seal, and an antenna, coated with a coating of the present disclosure. Specific examples of use include, but are not limited to, the following items. The coffee device includes, for example, a traffic k device (for example, a road signal device, a railway signal device, a construction sign with a letter (4), and an EL panel (for example, a lift type panel, an information card, an on-board traffic signal device). , ring lights, etc.), road traffic signs ti (such as 'direction cards, traffic jam display boards, accompanying road guide lights, etc.), advertising media (for example, large LED TVs, advertising lights, poles, interior lighting EL signs, Slotted characters, edge lights, etc.) and on-board lights. - the circuit board comprises: a rigid printed circuit board made of a resin comprising cellulose, an epoxy resin comprising a glass and a fiber, or a fluororesin; and a polyimide resin or a hydrocarbon-based resin ( A flexible printed circuit board made of PE, pp, etc., an LED chip or a semiconductor wafer mounted on a surface. In more detail, in a flexible printed circuit board, the base material is usually formed of a flexible film. And may be formed of an acrylic resin, a polyester resin, a polyamino phthalate resin, a polystyrene resin or a hydrocarbon-based resin in addition to the polyimine resin. Further, it can be used and used to manufacture printed circuits. The same technique of the board forms a conductive portion such as a wiring, a circuit, and a contact having an optional pattern on the base material. For example, a technique such as vacuum deposition or inkjet printing can be used 'from a conductive metal (such as copper, recorded, Gold, silver or Ming or its alloy) forms a wiring pattern such as wiring. Also, the conductor film can be applied to the entire surface of the film substrate material and selectively etched. A thin film is formed to form a wiring pattern layer. If necessary, the wiring pattern layer can be formed using a technique such as soldering. 134045.doc -19- 200920799 Each of FIGS. 1 to 3 shows an example of a linear lamp including a circuit board on which an LED chip is mounted. In the plan view of the respective drawings, the coating 5 is shown hatched to help understand the alignment. Fig. 1 shows a linear lamp in which the LED chip 3 is mounted on the surface of a circuit board 1 made of epoxy resin including glass fibers. ^ The LED chip 3 can emit white light. On the surface of the circuit board 1, the copper wiring 2 is exposed and connected to the copper wiring via the covered wire 6 and fixed using the flux 4. The copper wiring 2 and the connection portion between the copper wiring 2 and the wire 6 And the LED wafer 3 is sealed by coating 5 to coat it. The coating composition of the present disclosure can be dropped in a spot-like manner by using a drip method and the coating composition is cured to form a coating 5 easily. In the example shown in the figure, 'only the coating composition of the present disclosure is applied to one part of the surface of the circuit board 1 to be coated. The adhesion of the coating composition to the circuit board 1 is extremely strong and during use. Coating 5 will not peel off The water repellency, insulation and durability of the circuit board can be further improved by applying the coating composition to the entire surface of one surface of the circuit board 1. Fig. 2 shows an improvement of the circuit board shown in Fig. 1. In Fig. 2, the coating composition of the present invention is applied to the entire surface of a circuit board 1 including an LED wafer 3. In this example, the coating composition can be applied by a spray coating method. The coating composition has strong adhesion to the circuit board and does not peel off during use. The water repellency and insulation of the circuit board can be further improved by applying the coating composition to the entire surface of the circuit board. And durability, and thus the range of use of the circuit board 1 can be further increased. Figure 3 shows another modification of the circuit board 1 shown in Figure 1. In Figure 3, the coating composition of the present disclosure is evenly coated 134045 .doc • 20- 200920799 Overlay the entire surface of board 1 (5. In this example, the coating can be applied to the coating and the coating of the board. Coating. Extremely strong and the coating 5 does not peel during use. The smear of the present disclosure can be used to protect or seal the exposed portion of the wire (not shown). For example, 'an example, s, usually covered with gas vinyl. For ease of use, the battery should be detached from the nt 〃 cover. Coating composition of the present disclosure

f is used to coat exposed wires to protect exposed wires from external influences (eg UN, moisture). Similarly, the surface of the various antennas can be coated with the coating composition of the present disclosure to protect the antenna. The antenna can be used continuously for a long time, while still renting $治> ^ ^ 1J appeals to maintain the excellent characteristics of the antenna without defects. EXAMPLES The present disclosure will now be described by way of examples. This disclosure is not limited by these examples. Example 1 In this example, the relationship between the viscosity of the coating composition and the drying time was examined based on the addition (or no addition) of the fluoropolymer B. Fluoropolymer A is a copolymer of TFE, HFP and VDF, which is composed of Dyne〇n

LLC, Oakdale, MN is sold under the trade name "DYNEON" THV 220A, and MEK is used as a solvent. Gas polymer B is a PTFE powder sold by Dyneon LLC, Oakdale MN under the trade name "DYNEON" Microp〇wder TF 9205. DYNE ON THV 220A is a fluoropolymer having a molecular weight exceeding i〇, 〇〇〇. DYNEON Micropowder TF 9205 has an average particle size measured by a laser 134045.doc •21 · 200920799 scattering method, and is an 8-coated composition. Drying time and viscosity. μιη. Measuring the coating with various concentrations for measuring the drying time First, the fluoropolymer hydrazine is added to the solvent at room temperature (25 〇 under the mash and dissolved by mixing to obtain The coating composition of the polymer B is not included. In the coating composition of the present disclosure, the fluoropolymer B is further added, followed by the mixing to obtain a homogenous dispersion solution. 0.5 coating is applied in the experiment. The composition is spread over a circular horizontal glass plate having a diameter of about 3 〇匪 (25 to 30 mm). The coating composition applied from the surface of the plate is solidified until the liquid does not adhere to the finger at the time of light touch. The time required is considered to be dry Time. Although the coating is dry when touched, fluid may still be present under the surface and the coating may be rendered elastic. The time when the coating is no longer felt to be elastic is recorded as the total drying time. Viscosity measurement according to JIS K6833 (Fiscal Year 1994) The viscosity of the coating composition was measured using a viscometer manufactured by Tokyo Keiki c〇Ud. The composition, drying time and viscosity of each group of injuries are summarized in Table 2 below. 134045.doc -22- 200920799 Table 2 Based on the total weight of fluoropolymer A and MEK, the weight of fluoropolymer A is based on the weight of fluoropolymer A, the weight of fluoropolymer B (%), surface drying time (min), total drying time (min) Viscosity of the composition (mPa.s) 10 0 6.5 7.5 41 15 0 6.5 8.5 220 20 0 5.5 8.5 750 25 0 5.5 10.5 4 500 30 0 2.5 11.0 8 400 35 0 2.0 14.5 26 000 __40 ------- — 1 —-0 0.5 16.5 43,000 20 5 7.5 9.0 780 20 25 6.0 9.0 820 20 50 5.5 100 〇rt〇_ 20 100 3.5 20.0 1 mo 20 ----- --_ 3.5 20.5 1,600 20 200 2.0 24.5 2,000 As shown in Table 2, when the viscosity of the coating composition is 4,000 mPa.s or more, the surface is dry. When the time is less than 55 min, when the surface drying time is 3 minutes or less, it is almost impossible to apply by brushing.

As is apparent from the results shown in Table 2, in the coating without the defeat of the polymer B, and in the mouth, # increase the concentration of the fluoropolymer A to form a thick coating, or - or a greater concentration Excessively increase the viscosity and excessive _ between, and therefore can not be brushed. On the other hand, in the present coating composition, a suitable viscosity and a suitable surface drying time can be maintained and a thick coating is carried out by a single coating operation. By optimizing the thickness; coating: adding the thickness of the coated film to obtain by a single coating operation 134045.doc -23, 200920799 Example 2 Adding 5 g DYNEON THV 220A (fluoropolymer A) to 20 g MEK and dissolved by mixing to obtain a 20% fluoropolymer A solution. 5 g of different THV copolymer (manufactured by Dyneon Co., Oakdale, MN, sold under the trade name DYNEON "THV 610) (fluoropolymer 3) ground product (classified as particle size 4 5 to 12 5 The powder between μηι) was added to the resulting solution, followed by stirring to obtain a coating composition. This coating composition was dip-coated on a green copper substrate and dried 3 times. Compared with DYNEON THV 220, DYNEON THV 610 had a higher tetrafluoroethylene content and was insoluble in MEK. Example 3 Example 3 was carried out in the same manner as in Example 2 except that the particle size of DYNEON THV610 was classified between 125 and 250 μm. Example 4 Except for DYNEON THV610 Example 4 was carried out in the same manner as in Example 2 except that the diameter was between 125 and 250 μηι and butyl acetate was used instead of hydrazine as a solvent. Example 5 The fluoropolymer oxime was sold under the trade name "DYNEON" TF9207 Micropowder. Example 5 was carried out in the same manner as in Example 2 except that PTFE fluororesin particles (manufactured by 3M Co., St. Paul, MN) and butyl acetate were used instead of MEK as a solvent. Comparative Example 1 except for the addition of 0.5 g (same volume as 5 g DYNEON THV 610) sold under the trade name "3M Glass Bubbles K20" (manufactured by 3M Co., St. Paul, MN) 134045.doc -24- 200920799 Comparative Example 1 was prepared in the same manner as in Example 2 except that the glass was bubbled and a coating composition was prepared. The glass bubble is a soda-calcium borosilicate glass having a true specific gravity of 〇〇.2〇〇士〇.〇2 and a particle size distribution of 3〇 to 11〇01!1 (8〇% or more). Comparative Example 2 Comparative Example 2 was prepared in the same manner as in Comparative Example 1, except that butyl acetate was used instead of MEK as a solvent. Comparative Example 3 Comparative Example 3 was prepared in the same manner as in Example 除 except that fluoropolymer B was not added. Comparative Example 4 Comparative Example 4 was prepared in the same manner as in Example 1 except that fluoropolymer B was not added and butyl acetate was used instead of MEK as a solvent. The samples of the above examples and comparative examples were subjected to a light transmission test and a water repellency test. Measurement of Transmittance: The film was peeled off from the phenolic paper copper substrate and the spectral transmittance was measured over the entire visible range using a U-4 100 spectrophotometer manufactured by Hitachi, Ltd. The visible light transmittance is then determined by correcting the visibility and the light source. Water resistance test: The phenolic paper copper substrate used for coating has a width of 丨6 mm, a thickness of 1.5 mm and a length of 75 mm, and a slit having a width of mm2 mm at the center (see Fig. 4). Therefore, the copper wirings 2 on the right and left sides of the substrate are electrically independent. The entire portion below the line c_c is coated with a coating $ formed by dip coating. Further, the water repellency test was carried out by immersing the water in a line w_w below the line c_c. The right side and the left side of the upper copper wiring are exposed. I34045.doc -25- 200920799 is clamped with a spring clip connected to a digital multimeter (P-ίο, manufactured by METEX Co.), and then the resistance value is measured. As shown in Table 3, the uncoated test sample showed resistance values of several hundred kQ (kilo ohms). In the water resistance test, a sample having a coating exhibiting a resistance value of 40 Μ Ω or higher (showing sufficient insulation and water repellency) measured after 30 minutes in water was rated as "qualified". The test results are shown below. Table 3 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Fluoropolymer THV220A THV220A THV220A THV220A THV220A THV220A THV220A THV220A A(g) 5 g 5 g 5g 5 g 5g 5g 5 g 5g fluoropolymer THV 610 THV 610 THV 610 TF9207 K20 K20 without B (g) 5g 5 g 0.5 g 0.5 g fluoropolymer B particle size (μηι) 45-125 125-250 125-250 about 4 30- 110 30-110 No added solvent (g) MEK MEK Butyl acetate butyl acetate MEK Butyl acetate MEK Butyl acetate 20 g 20 g 20 g 20 g 20 g 20 g 20 g 20 g Dry film thickness (mm) 0.58 0.77 0.73 0.65 0.60 0.75 0.23 0.23 Transmittance (%) 76 64 65 76 20 18 79 88 Waterproof qualified pass qualified pass qualified pass qualified As shown in Table 3, it is obvious when adding fluoropolymer particles B and Thick coating when adding glass bubbles Even when the fluoropolymer particles B are added, the light transmittance is almost the same as when the fluoropolymer B is not added. On the other hand, when the glass bubbles are added, the light transmittance is low and the coating film becomes white. The system is obtained by the similarity of the refractive index, because the refractive index of DYNEON THV 220A is about 1.36, and the refractive index of the ground DYNEON THV610 and the unground DYNEON THV 610 is about 1.36, and the refractive index of DYNEON TF9207 Micropowder is 1.35. -26- 134045.doc 200920799 On the other hand, since the glass bubble contains sodium calcium borosilicate glass (refractive index: 1.53 to 1.57) as the main component, the refractive index between DYNEON TF9207 Micropowder and DYNEON THV 220A The difference is more than 0.15 (for example, 0.17 to 0.21). Therefore, the transparency of the dry coating composition cannot be obtained.

By adding the same amount of DYNEON TF9205 Micropowder to DYNEON THV220A by weight, as described in Example 1, to produce a weight of fluoropolymer a of 2% by weight and fluorine based on the total weight of fluoropolymer A and solvent. A coating composition of the present disclosure was prepared by coating a coating composition having a weight of the fluoropolymer b of 1% by weight of the polymer A. This coating composition was coated on the circuit board 1 to form the article shown in Fig. 5. The 'LEDs' are connected to the board 经由 via wires as shown in FIG. The wire 6 is attached to the circuit board to connect the power source and the coating composition is applied to the circuit board to be wrapped with the coating 5. The bullet-shaped LED of the object shown in Fig. 5 is soldered to the board. Since the shape is complicated, a dip coating method, a brush coating method, and a potting method are used in combination to apply the coating composition onto a circuit board containing an LED. The length of the LED pins that penetrate the board and protrude from the board 1 varies from 丨 to 5 mm. Even when the length of the protruding pins is 5 mm, the coating composition of the present disclosure can also be used for thick coating. Connect the resulting object (Figure 5) to a power source and immerse in water. The LED continuously emits 3G minutes or more. Neither oxygen nor hydrogen (electrolysis) was observed during the immersion in the water, nor was the dissolution of the metal ions observed. Example 7 134045.doc • 27· 200920799 A coating composition was prepared as disclosed in Example 6, and coated by a dip coating method on an LED linear lamp (according to the trade name "white LED Substrate Unit NP-00014 'on the basis of 'shibazaki Seisakusho Ltd.'), and then by continuously storing the current for 2 hours or more in a state where the average thickness is 〇〇〇, the 〇〇〇 board is immersed in water at a depth of 1 m from the water surface Open. Therefore, it has been found that the circuit board on which the lEd of this example is mounted has water resistance corresponding to (Japanese Industrial Standard c〇92〇) protection grade 7 or higher (waterproof dip type). Modifications and variations of the present invention are obvious to those skilled in the art without departing from the scope of the invention. The present invention should not be limited to the embodiments set forth herein for the purpose of illustration. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view (A) and a cross-sectional view (B) showing an example of a circuit board including an LED chip mounted therein according to the present disclosure; FIG. 2 is a view showing installation according to the present disclosure. A plan view (A) and a cross-sectional view (B) of another example of a circuit board of an internal LED chip; FIG. 3 is a plan view showing another example of a circuit board including an [ED wafer] mounted inside according to the present disclosure ( A) and cross-sectional view (B); FIG. 4 is a perspective view of the substrate used in the waterproof test; and FIG. 5 is a plan view and a side view (B) of the substrate using the bullet-shaped LED including the long pins. [Main component symbol description] Figure 1-3 Circuit board/substrate 134045.doc -28· 200920799 2 Copper wiring 3 LED wafer 4 Flux 5 Coating 6 Covered wire Figure 4 1 Phenolic paper copper substrate 2 Copper wiring 5 Coating pattern 5 1 circuit board 5 coated 6 wire

L 134045.doc -29

Claims (1)

200920799 X. Patent application scope: A coating composition comprising fluoropolymer A, a polymer B, and a solvent, wherein the fluoropolymer is dissolved in the solvent, and wherein the oxime is in the form of particles and is insoluble in the solvent. 2. The difference between the refractive index of the fluoropolymer oxime and the refractive index of the gas polymer B in the coating composition of claim 1 is less than 〇15. 3. 4. 5. 6. The coating composition of claim 1 or 2, wherein the fluoropolymer A is a fluoropolymer comprising at least hexafluoropropylene and vinylidene fluoride. The coating composition of claim 1 or 2, wherein the fluoropolymer A is a fluoropolymer comprising tetrahydroethylene, hexafluoropropylene and ethylene dioxyethylene. The coating composition of claim 1, wherein the fluoropolymer B is selected from the group consisting of: a gas polymer comprising: tetrafluoroethylene, hexafluoropropylene, and a polymer of partial or fluoroethylene Polytetraethylene-based fluoropolymer; fluoropolymer based on perfluoroethylene-propylene copolymer; fluoropolymer based on ethylene-tetrafluoroethylene copolymer Base: a fluoropolymer of polyvinylidene fluoride; a fluoropolymer based on polychlorotrifluoroethylene; or a fluoropolymer based on an ethylene-trifluoroethylene copolymer. The coating composition of 2 π, wherein the fluoropolymer 6 has a dry weight of the fluoropolymer, and the fluoropolymer enthalpy is contained in an amount of from 50 to 15 Å Q/°. The coating composition of claim 1 for sealing at least the electrically conductive portion included in the article. An article comprising a conductive portion and a coating formed from the coating composition of any one of claims 1 to 7, wherein at least the conductive portion is sealed by the coating composition. 134045.doc 200920799 9. The object of claim 8, straight.导电 Τ the conductive #刀 is exposed from the object 10. The object of claim 8 or 9, which is a coffee device, and at least - the LED component of the device is connected to the conductive component of the LED component seal. 11. The object of claim 8 or 9, which is a flexible circuit board comprising a functional component mounted on a surface, and at least the functional component of the flexible circuit board and the conductive portion connected to the functional component are The coating is sealed. 12. The article of claim 8 or 9, which is an electronic device comprising a function 70 mounted therein, and at least the functional component of the device and the electrically conductive portion coupled to the functional component are sealed by the coating. 13. The article of claim 8 or 9, which is a coated wire or antenna, and at least the wire or exposed portion of the antenna is sealed by the coating. 134045.doc