WO2007125785A1 - 硬化性樹脂組成物 - Google Patents
硬化性樹脂組成物 Download PDFInfo
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- WO2007125785A1 WO2007125785A1 PCT/JP2007/058371 JP2007058371W WO2007125785A1 WO 2007125785 A1 WO2007125785 A1 WO 2007125785A1 JP 2007058371 W JP2007058371 W JP 2007058371W WO 2007125785 A1 WO2007125785 A1 WO 2007125785A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a cured product having a high refractive index, heat resistance, and weather resistance suitable for sealing optical devices such as LEDs (hereinafter sometimes referred to as light emitting elements), photosensors, lasers, and general optical materials. Excellent heat resistance and light resistance suitable for sealing LEDs and white light emitting devices that emit blue to ultraviolet light, and curable resin compositions containing this polyorganosiloxane.
- the present invention relates to an LED encapsulant composition excellent in workability as well as an optical device encapsulated with the curable resin composition.
- LEDs have excellent features such as long life, high brightness, and low power consumption, and their applications are expanding year by year.
- blue and ultraviolet LEDs have recently been developed and are rapidly spreading in applications such as illumination light sources, display devices, and liquid crystal display knocklights.
- LEDs that emit light with a wavelength of about 350 nm to 500 nm such as blue LEDs and ultraviolet LEDs, generate a large amount of heat from the semiconductor chip and have a short wavelength. Coloring due to the deterioration of the fat is promoted, which absorbs the light emitted from the semiconductor chip force, thereby reducing the transmitted light, resulting in a decrease in the brightness of the LED in a short time.
- Silicone-based resins are known as other LED sealing materials. Silicone-based sealing materials are excellent in transparency, weather resistance, and heat resistance, so they are often used in blue LED and ultraviolet LED applications that deteriorate with epoxy resin.
- Conventional silicone-based encapsulants are mainly composed of alkenyl group-containing polyorganosiloxane, hydrogen polyorganosiloxane, hydrosilation catalyst, curing regulator, etc.
- a gel-like or rubber-like elastic body It is used as a sealing material for LEDs by utilizing this (for example, Patent Documents 4 and 5).
- Patent Documents 4 and 5 Due to the higher brightness of LEDs and the accompanying increase in the amount of heat generated, even in the case of sealing materials using silicone resins, coloring gradually progresses. However, further improvement in heat resistance and light resistance has been desired.
- Patent Document 1 JP 2003-176334 A
- Patent Document 2 Japanese Patent Laid-Open No. 2003-26763
- Patent Document 3 Japanese Patent Laid-Open No. 2003-277473
- Patent Document 4 Japanese Patent Laid-Open No. 3-22553
- Patent Document 5 Japanese Patent Laid-Open No. 3-166262
- the first object of the present invention is excellent in transparency, weather resistance and heat resistance with a high refractive index, and curing with an appropriate balance of hardness and strength.
- the second object is to provide a polyorganosiloxane suitable for encapsulating opto-devices, particularly blue LEDs and ultraviolet LEDs, and a second object is to provide a curable resin containing the polyorganosiloxane.
- An object of the present invention is to provide an oil composition and an opto-device sealed with the curable resin composition.
- the third purpose is sealing for LED, especially silicone sealing for blue LED and UV LED as a sealing material with excellent transparency, heat resistance, light resistance and workability. It is to provide an LED sealed with a material and this sealing material.
- the present inventors As a result of intensive investigations to achieve the above object, the present inventors, as a result of using polyorganosiloxane having a specific structural unit and an average composition, have excellent transparency and a high refractive index. It has been found that it is possible to provide a curable resin composition that provides a cured product with excellent balance, having good hardness and strength, and an opto-device sealed thereby.
- a composition comprising a polyorganosiloxane mixture composed of units having a specific structure, a polyorganohydrodiene polysiloxane mixture, and an addition reaction catalyst in a specific ratio allows for transparency, light resistance,
- An LED encapsulant composition having excellent workability that gives a cured product with excellent heat resistance and sealing We found that we could provide the LED.
- the present invention has been completed based on strong knowledge.
- R 1 represents a vinyl group
- R 2 represents a methyl group or a phenyl group
- R represents an alkyl group having 1 to 6 carbon atoms
- Ph represents a fur group
- the active solvent is used as a mixture of carboxylic acids alone or one or more solvents selected from aliphatic carboxylic acid esters, ethers, aliphatic ketones and aromatic solvents and carboxylic acids (2) ),
- the terminal silanol group is hexamethyldisilazane, trimethylchlorosilane, triethyl Choose from chlorosilane, triphenylchlorosilane and dimethylvinylchlorosilane
- the (B) component polyorganohydrogenpolysiloxane has (CH 3) SiHO units and / or
- the blending amount of component (B) relative to component (A) is such that the molar ratio of hydrogen atoms bonded to the silicon atoms in component (B) to vinyl groups in component (A) is 0.5.
- R 3 to R 5 represent methyl group or phenyl group, respectively
- the blending ratio of the (Y) component to the (X) component is such that the molar ratio of hydrogen atoms bonded to the silicon atom in the (Y) component to the vinyl group in the (X) component is 0.8.
- a cured product with excellent transparency, high refractive index, weather resistance, heat resistance, and a suitable balance of hardness and strength
- opto device applications especially A polyorganosiloxane suitable for sealing for blue LEDs and ultraviolet LEDs, a curable resin composition containing the polyorganosiloxane, and an opto-device sealed with the curable resin composition can be provided. .
- a sealing material for LED sealing especially blue LED and ultraviolet LED
- a silicone-based sealing material composition excellent in transparency, heat resistance, light resistance and workability, and this sealing material composition An LED sealed with an object can be provided.
- FIG. 1 is a GPC curve of the polyorganosiloxane obtained in Example 1.
- FIG. 2 is a 1 ! “I-NMR chart of the polyorganosiloxane obtained in Example 3.
- FIG. 3 is an IR chart of the polyorganosiloxane obtained in Example 3.
- the polyorganosiloxane of the present invention has a structural unit and an average composition of the following formula (I)
- R 1 represents a bur group
- R 2 represents a methyl group or a phenol group
- a to e represent a molar ratio, 0.15 ⁇ a ⁇ 0.4, 0.l ⁇ b ⁇ 0. 2, 0. 15 ⁇ c ⁇ 0. 4, 0. 2 ⁇ d ⁇ 0. 4
- Ph represents a phenyl group.
- the cured product When d is less than 0.2, the cured product becomes a soft and sticky cured product, and when d is greater than 0.4, the cured product becomes hard and brittle.
- e is for controlling the curability of the polyorganosiloxane, and when it is larger than 0.2, the curing speed is increased and the cured product is distorted, which is not preferable for the LED encapsulant.
- the cured product becomes hard and brittle, or becomes a soft adhesive cured product, light resistance or refractive index decreases, LE It is not preferred as a resin for D sealing material.
- the polyorganosiloxane represented by the above formula (I) those having a molecular weight of about 500,000 to 100,000 are preferably used from the viewpoint of viscosity and solubility with other components, one kind alone or two kinds or more. It can be used in combination.
- the polyorganosiloxane of the present invention represented by the above formula (I) can be obtained by a cocondensation reaction after hydrolysis using organosilanes corresponding to each structural unit.
- raw materials such as chlorosilanes such as trimethylchlorosilane, triethylchlorosilane, triphenylchlorosilane, tripropylchlorosilane, diphenyldichlorosilane, vinyl trichlorosilane, phenyltrichlorosilane, methyltrichlorosilane, and ethyltrichlorosilane.
- an acidic catalyst such as hydrochloric acid, but preferably at least the following formula (II)
- R 1 represents a beer group
- R 2 represents a methyl group or a phenyl group
- R represents an alkyl group having 1 to 6 carbon atoms
- methyl ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, isopentyl, neopentyl, hexyl, isohexyl, cyclohexyl, etc.
- the methyl group is preferable from the viewpoint of availability and reactivity.
- Ph represents a phenol group.
- alkoxysilane represented by the above formula (II) examples include trimethylmethoxysilane, trimethylenoethoxysilane, trimethylenopropoxyxysilane, triphenylmethoxysilane, triphenylethoxysilane, diphenyldimethoxysilane, diphenylgers.
- Toxisilane, vinyl trimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltrie Examples include toxisilane.
- a carboxylic acid alone or a mixed solvent of at least one solvent selected from aliphatic carboxylic acid esters, ethers, aliphatic ketones, and aromatic solvents and a powerful rubonic acid should be used.
- carboxylic acids include formic acid, acetic acid, propionic acid, benzoic acid and the like
- solvents for aliphatic carboxylic acid esters include ethyl formate, propyl formate, and formic acid.
- ether solvents include jetinoreethenole, methinoreethinoreethenore , Methinorepropinoreethenole, ethylene glycolenoresimethyl ether, diisopropylacetate Terephthalate, tetrahydrofuran, dioxane, dioxolan and the like, and aliphatic ketone solvents include acetone, methyl ethyl ketone, methyl isobutyl ketone, diisoptyl ketone, cyclopentanone, cyclohexanone, and the like.
- Examples of the group solvents include benzene, toluene, xylene, ethylbenzene, black benzene, dichlorobenzene, etc., preferably acetic acid alone, or a mixed solvent of acetic acid with methyl ethyl ketone and Z or toluene be able to.
- the amount of the carboxylic acids used is usually 1.0 to 5.0 times, preferably 1.2 times the molar amount of the carboxylic acids relative to the total molar amount of the raw material alkoxysilane in order to allow the condensation reaction to proceed completely. It is preferable that the ratio of carboxylic acid to organic solvent is 1:10 to LO: l.
- the reaction temperature at the time of synthesizing the polyorganosiloxane of the present invention represented by the above formula (I) varies depending on the solvent and raw materials used, and is usually 20 ° C to 150 ° C, preferably 50 ° C to 120 ° C.
- an acid chloride such as acetyl chloride, propiochloride, benzoyl chloride, silyl chloride such as trimethylsilyl chloride, triethylsilyl chloride, etc.
- acetyl chloride is used.
- These catalysts can be used in the range of 0.01 to 0.5 mass% with respect to the reaction solution.
- the polyorganosiloxane of the present invention represented by the above formula (I) has a terminal silanol group which may adversely affect the stability of the compound and the physical properties of the cured product.
- Silazane, trimethylchlorosilane, triethylchlorosilane, triphenylchlorosilane, and dimethylvinylchlorosilane force Select by sealing with one or more selected silanic compounds.
- the curable resin composition of the present invention has (A) the polyorganosiloxane of the present invention represented by the above formula (I), and (B) an average of two or more hydrogen atoms bonded to a silicon atom in one molecule.
- a composition comprising polyorganohydrogenpolysiloxane and (C) a hydrosilylation catalyst, which can be used as a sealing material.
- the polyorganohydrogenpolysiloxane which is the component (B) in the curable resin composition of the present invention is a crosslinking agent for curing the composition by reacting with the component (A) by hydrosilylation reaction.
- polyorganohydrogenpolysiloxane examples include 1, 1, 3, 3-tetramethyldisiloxane, 1, 3, 5, 7-tetramethylcyclotetrasiloxane, 1, 1, 3, 3-tetraphenyl.
- Copolymer comprising SiO units and SiO units, (CH) HSiO units and (C H) SiO
- Examples thereof include copolymers composed of 1/2 4/2 3 2 1/2 6 5 3/2 units.
- the blending amount of the polyorganohydrogenpolysiloxane as the component (B) is as follows: Mono ktt force of hydrogen atom directly connected to the silicon atom in component (B) with respect to the total molar amount of vinyl groups in the component, usually 0.5 to 2.0 times, preferably 0.8 to 1 By setting the amount to 5 times, a good cured product can be obtained.
- the hydrosilylation reaction catalyst which is the component (C) in the curable resin composition of the present invention is usually used to promote the hydrosilylation reaction between a hydrogen atom bonded to a hydrogen atom and a hydrocarbon having multiple bonds.
- the catalyst is used to promote the hydrosilylation reaction between the bur group in component (A) and the SiH group in component (B).
- Examples of the hydrosilylation reaction catalyst that is component (C) include platinum group metal catalysts such as metals, metal compounds such as platinum, rhodium, palladium, ruthenium, and iridium. In particular, it is preferable to use platinum and a platinum compound. Platinum compounds include PtCl, H PtCl ⁇ 6 ⁇ 0, Na PtCl ⁇ 4 ⁇ 0, H PtCl-6H O and cyclohexane.
- Platinum halides such as reaction product, platinum-1,3 divinyl-1,1,3,3-tetramethyldisiloxane complex, bis ( ⁇ -picoline) -platinum dichloride, trimethylenedipyridine platinum dichloride, dicyclopenta Gen-Platinum Dichloride, Cyclooctagen Platinum Dichloride, Cyclopentagen-Platinum Dichloride, Bis (Anoalkyl) bis (Triphenylphosphine) Platinum Complex, Bis (alkyl) (Cyclooctagen) Palladium Complex, etc.
- Various platinum complexes are mentioned.
- the compounding amount of the hydrosilylation reaction catalyst as component (C) is usually about 1 to 500 ppm, particularly about 2 to about LOO ppm, based on the total mass of the components ()) and ( ⁇ ) as platinum group metals. It is preferable.
- various additives can be added to the curable resin composition of the present invention as long as the effects thereof are not impaired.
- a reaction control agent for hydrosilylation reaction to give curability and pot life a phosphor such as YAG for white light emission, and inorganic fillers and pigments such as fine-particle silica and titanium oxide as required, organic You may mix
- Curing conditions are usually 30 ° C to 200 ° C, preferably 80 ° C to 150 ° C, and cured for 10 minutes to 300 minutes at a temperature suitable for the type of catalyst used. Thus, a good cured product can be obtained.
- the curable resin composition of the present invention is used as an optical device sealing material, it is necessary to transmit light. It is not only transparent but also refracted to increase the light extraction efficiency from the light emitting element. A high rate is desirable. In addition, in order to reduce deformation and distortion so that stress is not applied to the light emitting element as much as possible, it is required to have a certain degree of hardness and be resistant to impact, so that it is difficult to break.
- the curable resin composition of the present invention sufficiently satisfies these required characteristics and is particularly effective as an encapsulant composition for opto-devices, especially LEDs.
- the sealed opto-device of the present invention is obtained by coating a light-emitting element having a main light emission peak of usually 550 nm or less using the curable resin composition of the present invention and heat-curing at a predetermined temperature. can get.
- the light emitting element is not particularly limited as long as the main light emission peak is usually 550 nm or less, and conventionally known LEDs are exemplified, and nitride LEDs such as GaN and InGaN are particularly preferable.
- Such LEDs are manufactured by stacking semiconductor materials on a substrate with a buffer layer of GaN, A1N, etc., if necessary, by various methods such as MOCVD, HDVPE, and liquid phase growth. The thing which was done is mentioned.
- Various materials can be used as the substrate in this case, and examples thereof include sapphire, spinel, SiC, Si, ZnO, and GaN single crystals. Of these, sapphire is preferred from the viewpoint of being able to easily form GaN with good crystallinity and high industrial utility value.
- An electrode can be formed by a method known in the art! /, And the electrode on the LED is electrically connected to a lead terminal or the like by various methods.
- a material having good ohmic mechanical connectivity with the electrode of the light emitting element is preferable.
- a bonding wire using gold, silver, copper, platinum, aluminum or an alloy thereof can be given.
- a conductive adhesive or the like in which a conductive filler such as silver or carbon is filled with a resin can also be used. Of these, from the viewpoint of good workability, it is preferable to use aluminum wire or gold wire.
- the lead terminal used in the present invention preferably has good adhesion to an electrical connection member such as a bonding wire, good electrical conductivity, etc.
- the electrical resistance of the lead terminal is preferably 3 00 ⁇ ⁇ ' More preferably, it is 3 ⁇ ′cm or less.
- these lead terminal materials include iron, copper, iron-containing copper, tin-containing copper, and those obtained by plating silver, nickel, or the like. The glossiness of these lead terminals may be adjusted as appropriate to obtain a good light spread.
- the sealed opto-device of the present invention can be produced by coating the LED connected with electrodes, lead terminals, etc. with the curable resin composition of the present invention, followed by heat curing.
- the coating is not limited to directly sealing the LED, but includes the case of indirectly coating the LED.
- the LED may be sealed by various methods conventionally used directly with the curable resin composition of the present invention !, and conventionally used epoxy resin, acrylic resin, urea resin. After sealing the LED with a sealing resin such as fat or imide resin, the top or the periphery thereof may be coated with the curable resin composition of the present invention.
- the LED may be sealed with the curable resin composition of the present invention, and then molded with a conventionally used epoxy resin, acrylic resin, urea resin, imide resin, or the like.
- a conventionally used epoxy resin acrylic resin, urea resin, imide resin, or the like.
- the liquid curable resin composition of the present invention may be poured into a cup, a cavity, a knock recess, or the like having an LED placed on the bottom by a dispenser or other methods and cured under the above heating conditions.
- the solid or high viscosity liquid curable resin composition of the present invention may be heated and flowed to be similarly injected into a package recess or the like and further heated to be cured.
- the package in this case can be manufactured using various materials, such as polycarbonate resin, polyphenylene sulfide resin, epoxy resin, acrylic resin, silicone resin, ABS resin, etc. be able to.
- the curable resin composition of the present invention is injected into a mold mold and then the lead frame having the LED fixed therein is immersed therein and then hardened.
- the curable resin composition of the present invention is used by injection with a dispenser, transfer molding, injection molding, etc. into the mold into which the LED is inserted.
- the sealing layer may be formed and cured.
- the curable resin composition of the present invention simply in a liquid or fluid state may be dropped or coated on an LED to be cured.
- a sealing layer made of the curable resin composition of the present invention can be formed and cured by stencil printing, screen printing, or coating through a mask on the LED.
- a method of fixing the curable resin composition of the present invention, which has been partially cured or cured into a swaged plate shape or a lens shape, on the LED may be used.
- it can be used as a die-bonding agent that fixes the LED to the lead terminal or package, or it can be used as a passivation film on the LED.
- the shape of the covering portion is not particularly limited and can take various shapes.
- These shapes may be formed by molding and curing the curable resin composition of the present invention, or may be formed by post-processing after curing the curable resin composition of the present invention.
- the sealed opto-device of the present invention can be of various types, for example, any type such as a lamp type, an SMD type, and a chip type.
- Various types of SMD type and chip type package substrates are used, and examples thereof include epoxy resin, BT resin, and ceramic.
- the sealed opto-device of the present invention can be used for various known applications. Specific examples include backlights, illumination, sensor light sources, vehicle instrument light sources, signal lights, indicator lights, display devices, light sources for planar light emitters, displays, decorations, and various lights.
- the LED encapsulant composition of the present invention (hereinafter sometimes simply referred to as a composition) will be specifically described.
- the composition of the present invention is basically a curable resin composition comprising only the above components (X) to (Z) or, if necessary, only an inorganic filler or a phosphor material. It is characterized by a curing regulator, antioxidant, and adhesion improver that are conventionally used. No organic compound is added, and the ratio of the vinyl atom in the (X) component and the hydrogen atom bonded to the silicon atom in the (Y) component is optimized, so that conventional silicone LED encapsulation The LED encapsulant composition is superior in heat resistance and light resistance compared to the material.
- the polyorganosiloxane mixture as the component (X) in the composition of the present invention has a structural unit and an average composition represented by the following formula (III), and an average of two or more vinyls per molecule.
- the curability and pot life are not adjusted by adding a curing modifier.
- Hydrosilylation rate which is a curing reaction for vinyl groups in CH (CH) SiO) units
- the curing rate can be adjusted arbitrarily by adjusting the content of these two types of bur groups in the polyorganosiloxane, and the ratio of i: j is preferably in the range of 1: 4 to 4: 1. By doing so, it was found that curability and stability can be obtained. As a result, it is possible to obtain a sufficient pot life without adding a conventional organic curing regulator that has been one of the causes of coloring by remaining in the cured product of the silicone resin.
- the ratio of i: j in component (X) can be determined arbitrarily according to the curability suitable for the intended application in the range of 1: 4 to 4: 1.
- the curing reaction proceeds relatively slowly, and the curing reaction proceeds relatively quickly when the ratio of j is increased.
- the molar ratio of i: j is outside the above range, for example, when i is too small, and when j is too large, the hydrosilylation reaction proceeds significantly even at room temperature, which tends to cause thickening and gelling. Too much j is too little However, it is not preferable because it is stable at room temperature but slows in the curing reaction, requiring long-time curing and curing at a higher temperature, which is disadvantageous in terms of productivity.
- Component (X) is obtained by using organosilanes and Z or organosiloxanes corresponding to each structural unit as raw materials, and co-hydrolyzing or co-hydrolyzing condensates using an acid or alkali. Can do.
- raw materials include trimethylchlorosilane, triphenylchlorosilane, vinyldimethylchlorosilane, dimethyldichlorosilane, phenylmethyldichlorosilane, diphenyldichlorosilane, vinyltrichlorosilane, phenyltrichlorosilane, chlorosilanes such as methyltrichlorosilane, trimethylmethoxysilane, Triphenylmethoxysilane, vinyldimethylmethoxysilane, divinyltetramethyldisiloxane, dimethyldimethoxysilane, phenylmethyldimethoxysilane, diphenyldimethoxysilane, vinyltrimethoxysilane, phenyltrimethoxysilane, methyltrimethoxysilane, etc. Of these alkoxysilanes.
- the polyorganohydrogenpolysiloxane mixture as the component (Y) in the composition of the present invention serves as a crosslinking agent for curing the composition by a hydrosilylation reaction with the polyorganosiloxane mixture as the component (X). It consists of at least one polyorganohydrogenpolysiloxane having two or more hydrogen atoms bonded to silicon atoms in one molecule.
- the polyorganohydrogenpolysiloxane is not particularly limited, but the same compounds as exemplified in the description of the polyorganohydrogenpolysiloxane (B) in the curable resin composition described above should be mentioned. Can do.
- the conventional addition reaction type silicone resin has a molar ratio of hydrogen atoms bonded to silicon atoms to vinyl groups of 1.5 times or more.
- the inventors have reduced the long-term heat resistance and light resistance of the cured product as the molar ratio of hydrogen atoms bonded to silicon atoms to vinyl groups increases. It was found that the color tends to be colored, and that the tendency becomes remarkable especially when the molar ratio exceeds 1.2 times.
- the blending amount of the polyorganohydride polysiloxane of component (Y) is the molar ratio of hydrogen atoms bonded to the silicon atom in component (Y) with respect to the vinyl group of polyorganosiloxane of component (X). Is an amount that is about 0.8 to 1.2 times, preferably 0.9 to 1.1 times. By setting it as such an amount, a cured product having excellent heat resistance and light resistance can be obtained.
- the molecular weight of the polyorganosiloxane mixture of component (X) and the polyorganohydrodiene polysiloxane mixture of component (Y) used in the present invention is preferably about 500 to 10,000 from the viewpoint of compatibility and viscosity. From the viewpoint of workability, it is preferably about 0.1 to 30 Pa ′S in a state where the (X) component and the (Y) component are mixed.
- the addition reaction catalyst of the component (Z) in the composition of the present invention is a catalyst that is usually used to promote the addition reaction between a silicon atom to which a hydrogen atom is bonded and a hydrocarbon having a multiple bond. In the present invention, this is a catalyst for promoting the hydrosilylation addition reaction between the vinyl group in the component (X) and the hydrogen atom directly bonded to the silicon atom in the component (Y).
- a platinum group metal catalyst is preferred.
- the hydrosilylation reaction catalyst of the component (C) in the curable resin composition is described below. As described.
- this addition reaction catalyst can be a catalytic amount, it is usually 1 to 500 ppm, particularly about 5 to 50 ppm based on the total mass of the (X) and (Y) components as a platinum group metal. It is preferable to do.
- an inorganic filler and a phosphor material can be added to the LED encapsulant composition of the present invention as necessary.
- the inorganic filler include fine-particle silica, acid titanium, and acid zirconium, and can be added as long as the transparency is not lost.
- it can be used as a sealing material for white LEDs by adding a phosphor material for wavelength conversion.
- the phosphor is not particularly limited, but generally a phosphor such as YAG is used.
- Curing conditions are 50 ° C to 200 ° C, preferably 80 ° C to 150 ° C, and cured for 30 minutes to 180 minutes at a temperature suitable for the type and amount of the catalyst used. As a result, a good cured product can be obtained.
- the LED package of the present invention is obtained by coating a light-emitting element having a main light emission peak power, preferably 550 nm or less, and heat-curing at a predetermined temperature using the composition of the present invention.
- the light-emitting element is described in the description of the sealed opto device described above. It is a cage.
- An electrode can be formed on a light emitting element by a conventionally known method.
- the electrode on the light emitting element can be electrically connected to the lead terminal or the like by various methods.
- a material having good ohmic mechanical connection with the electrode of the light emitting element is preferable, for example, a bonding wire using gold, silver, copper, platinum, aluminum, or an alloy thereof. It is done.
- a conductive adhesive or the like in which a conductive filler such as silver or carbon is filled with a resin can also be used. Of these, aluminum wire or gold wire is preferred from the viewpoint of good workability.
- the electrical resistance of the lead terminal is preferably one having good adhesion to an electrical connection member such as a bonding wire and good electrical conductivity. It is preferably ⁇ -cm or less, more preferably 3 ⁇ -cm or less.
- these lead terminal materials include iron, copper, iron-containing copper, tin-containing copper, and those obtained by plating silver, nickel, or the like. The glossiness of these lead terminals may be adjusted as appropriate in order to obtain a good light spread.
- the LED package of the present invention can be produced by coating a light emitting device with the composition of the present invention, followed by heat curing.
- the coating is not limited to directly sealing the light emitting element, but includes a case where the light emitting element is indirectly coated.
- the light-emitting element may be sealed by various methods conventionally used directly with the composition of the present invention, and conventionally used epoxy resin, acrylic resin, urea resin, imide resin, etc. After sealing the light-emitting element with glass sealing resin, it may be covered with the composition of the present invention. Further, after sealing the light emitting element with the composition of the present invention, it may be molded with a conventionally used epoxy resin, acrylic resin, urea resin, imide resin, or the like.
- the transmittance at 400 nm was measured using a spectrophotometer UV-1650PC manufactured by Shimadzu Corporation.
- the same resin board as that for light transmittance measurement was prepared and measured according to JIS K7105.
- the same resin plate as that for light transmittance measurement was prepared and left in an oven at 150 ° C. for 72 hours, and then the transmittance (%) at 400 nm was measured as a heat resistance index.
- 300 ml of toluene was added and washed 5 times with 300 ml of water to obtain a toluene solution of a polyorganosiloxane mixture.
- Toluene was removed from this solution by distillation under reduced pressure to obtain polyorganosiloxane having an average composition of the following formula. Number to the right of each structural unit Indicates the molar ratio of each structural unit.
- the structural unit (CH ⁇ CH 2 SiO 2) is a polyorganosilane of the present invention.
- Fabric 1 To 100 parts by weight of “Fabric 1”, 70 parts by weight of a poly (dimethylnodoxysiloxy) siloxane (number average molecular weight 1000) represented by the following formula (IV) is added, and this mixture is used as a catalyst. Platinum 1,3 divinyl-1,1,3,3-tetramethyldisiloxane complex was added to a platinum content of 30 ppm, and the mixture was thoroughly mixed and degassed.
- a poly (dimethylnodoxysiloxy) siloxane number average molecular weight 1000
- platinum 1,3 divinyl-1,1,3,3-tetramethyldisiloxane complex was added to a platinum content of 30 ppm, and the mixture was thoroughly mixed and degassed.
- the resin composition is mounted on a stem mounted with an LED chip having a peak wavelength of 465 nm.
- a transparent LED package with no tack or cracks in the sealed part was obtained.
- a 20 mm current was passed through the LED package between the glass plates with a 2 mm spacer, and cured under the same conditions to obtain a resin plate.
- the resin board was measured for transmittance at 400 mm, refractive index, weather resistance, and heat resistance.
- the state of the LED sealing part was evaluated.
- a commercially available terminal vinyl polydimethylsiloxane (number average molecular weight 770) represented by the following formula (VI) is a methylhydrogensiloxane file represented by the formula (V) commercially available as an organohydrogenpolysiloxane.
- Methylsiloxane copolymer (number average 50 parts by mass of molecular weight 1100) is added, and platinum-1, 3 divinyl-1, 1,3,3-tetramethyldisiloxane complex is added to the mixture as a catalyst so that the platinum amount is 30 ppm and stirred well. Mix and degas.
- the cured product obtained from the curable resin composition of the present invention and L The ED package is remarkably improved in refractive index and hardness while maintaining excellent light transmission, weather resistance and heat resistance.
- Illuminance retention rate (%) (irradiance after test) / (initial irradiance) X 100
- the reaction was carried out as described above to obtain a polyorganosiloxane mixture having an average composition of the following formula corresponding to the component (X). This is designated as “Resin B”.
- the numbers on the right side of each structural unit indicate the molar ratio.
- “Fabric A” 100 parts by weight of 1,3,5,7-tetramethylcyclotetrasiloxane 21 parts by weight as polyorganohydrogenpolysiloxane (amount of SiH to be 0.9 equivalent to vinyl group)
- 50 ppm of platinum 1,3 dibiru 1,1,3,3-tetramethyldisiloxane complex was added to this mixture as a catalyst, and the mixture was thoroughly mixed and degassed.
- this LED encapsulant composition was potted on a stem mounted with an LED chip having a peak wavelength of 465 nm and heated and cured at 150 ° C for 180 minutes. D package was obtained. The illuminance when a current of 20 mA was passed through this LED package was measured.
- composition was poured between glass plates with a spacer having a thickness of 2 mm, and cured at 150 ° C. for 180 minutes to obtain a resin plate.
- the IR spectrum of this resin board was measured to measure the transmittance at 400 nm and to confirm the curability.
- the obtained you! / On IR ⁇ vector confirmed the absorption derived from the absorption and 1000cm- 1 Bulle group derived from 2100cm- 1 of Si- H Te, Si- curing reaction absorption is completely without derived from H is completed It was.
- Table 3 The results are shown in Table 3.
- “Fabric D” 100 parts by mass of polyorganohydrogenpolysiloxane represented by the above formula (IV) (dimethylhydrogensiloxy) siloxane (number average molecular weight 1 000) 37 parts by mass (SiH is vinyl group) To this mixture, and add 50 ppm of platinum-1,1,3 dibule-1,1,3,3-tetramethyldisiloxane complex as a catalyst to this mixture. Defoamed. This composition thickened during work at room temperature and then gelled, making it impossible to perform each measurement.
- “Fabric E” 100 parts by mass of polyorganohydrogenpolysiloxane represented by the above formula (IV) (dimethylhydrogensiloxy) siloxane (number average molecular weight 1 000) 36 parts by mass (SiH is vinyl group) To this mixture, and add 50 ppm of platinum-1,1,3 dibule-1,1,3,3-tetramethyldisiloxane complex as a catalyst to this mixture. Defoamed. For this composition, a cured product was prepared in the same manner as in Example 5, and the IR spectrum was measured. Obtained was confirmed absorption from 2100 cm- 1 of the Si- H from absorption and 1000Cm- 1 Bulle group in IR ⁇ vectors, both absorption and remain, curing such have completed ChikaraTsuta.
- Resin D number average molecular weight 1 000
- “Fabric B” 100 parts by mass of poly (hydroxyhydrogensiloxy) siloxane (number average molecular weight 1 000) represented by the above formula (IV) as polyorganohydrogenpolysiloxane 50 parts by mass (SiH is vinyl group) To the mixture), and then add 50 ppm of platinum-1,3-dibule-1,1,3,3-tetramethyldisiloxane complex as a catalyst to this mixture and mix well. , Defoamed. With respect to this composition, an LED package and a cured product were produced in the same manner as in Example 5, and each characteristic was obtained. These results are shown in Table 3. In the obtained IR ⁇ vector, absorption from 2100 cm- 1 Si-H and absorption from 1000 cm- 1 bur group were confirmed. As a result, there was no absorption derived from vinyl group and the curing reaction was completed.
- a silicone that provides a cured product with excellent balance, having excellent transparency, weather resistance with high refractive index, and heat resistance as an encapsulation material for optical devices, particularly blue LEDs and ultraviolet LEDs.
- System curable resin compositions and excellent opto-devices are provided.
- an LED encapsulant composition having workability can be provided.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
- Silicon Polymers (AREA)
- Led Device Packages (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/297,466 US20090105395A1 (en) | 2006-04-25 | 2007-04-17 | Curable resin composition |
JP2008513149A JPWO2007125785A1 (ja) | 2006-04-25 | 2007-04-17 | 硬化性樹脂組成物 |
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RU2006113774 | 2006-04-25 | ||
RU2006113774/04A RU2401846C2 (ru) | 2006-04-25 | 2006-04-25 | Функциональные полиорганосилоксаны и композиция, способная к отверждению на их основе |
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PCT/JP2007/058371 WO2007125785A1 (ja) | 2006-04-25 | 2007-04-17 | 硬化性樹脂組成物 |
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US (1) | US20090105395A1 (ja) |
JP (1) | JPWO2007125785A1 (ja) |
KR (1) | KR20080110761A (ja) |
CN (1) | CN101426835A (ja) |
RU (2) | RU2401846C2 (ja) |
WO (1) | WO2007125785A1 (ja) |
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Also Published As
Publication number | Publication date |
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RU2008146390A (ru) | 2010-05-27 |
US20090105395A1 (en) | 2009-04-23 |
KR20080110761A (ko) | 2008-12-19 |
RU2401846C2 (ru) | 2010-10-20 |
JPWO2007125785A1 (ja) | 2009-09-10 |
CN101426835A (zh) | 2009-05-06 |
RU2006113774A (ru) | 2007-11-20 |
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