KR20160049539A - One-part curable silicone composition and optical semiconductor device - Google Patents

One-part curable silicone composition and optical semiconductor device Download PDF

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KR20160049539A
KR20160049539A KR1020167007805A KR20167007805A KR20160049539A KR 20160049539 A KR20160049539 A KR 20160049539A KR 1020167007805 A KR1020167007805 A KR 1020167007805A KR 20167007805 A KR20167007805 A KR 20167007805A KR 20160049539 A KR20160049539 A KR 20160049539A
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아키코 나베타
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다우 코닝 도레이 캄파니 리미티드
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Abstract

The present invention relates to a one-pack type curable silicone composition comprising (A) a branched chain organopolysiloxane having an alkenyl group and an aryl group; And (B) component (i) at least one compound selected from the group consisting of the following general formula: HR 2 2 SiO (R 2 2 SiO) m SiR 2 2 H wherein R 2 represents the same or different monovalent hydrocarbon groups lacking an aliphatic unsaturated bond, at least 15 mol% of R 2 in one molecule is an aryl group; m is to catalyst, and (iii) the organopolysiloxane, (ii) a hydrosilylation reaction metal-expressed with from 1 to 100 integer) the general formula: R 3 2 NR 4 -NR 3 2 wherein R 3 is the same or different and represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and R 4 represents an alkylene group having 2 to 4 carbon atoms, ≪ / RTI > The one-pack type curable silicone composition has storage stability.

Description

TECHNICAL FIELD [0001] The present invention relates to a one-pack type curable silicone composition and an optical semiconductor device,

The present invention relates to a one-part curable silicone composition which is cured by a hydrosilylation reaction, and to a photosemiconductor device manufactured using the composition.

Priority is claimed on Japanese Patent Application No. 2013-179426, filed on August 30, 2013, the content of which is incorporated herein by reference.

Since the curable silicone composition having an aryl group cured by the hydrosilylation reaction is rapidly cured by heating to form a highly transparent cured product having a high refractive index, the optical semiconductor device such as a light emitting diode (LED) As a sealant of the device and as a protective agent.

Examples of such curable silicone compositions include a curable silicone composition comprising a branched chain organopolysiloxane having phenyl and alkenyl groups, an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule, and a hydrosilylation reaction catalyst Patent Document 1); A straight chain organopolysiloxane having at least two alkenyl groups and at least one aryl group in one molecule, a branched chain organopolysiloxane having at least one alkenyl group and at least one aryl group in one molecule, at least two silicon-bonded An organopolysiloxane having a hydrogen atom bonded thereto, and a hydrosilylation reaction catalyst (see Patent Document 2); A straight chain organopolysiloxane having at least one alkenyl group in one molecule and containing diphenylsiloxane units, a branched chain organopolysiloxane having a vinyl group and a phenyl group, an organopolysiloxane having a diorganohydrogensiloxy group, and a hydrosilylation reaction catalyst (See Patent Document 3).

Such a curable silicone composition is provided with two components divided into a hydrosilylation reaction catalyst and an organopolysiloxane having silicon-bonded hydrogen atoms to ensure storage stability. For use, the two components should be homogeneously mixed. As a result, if the mixing ratio of the two components has to be changed, or if the two components are not sufficiently mixed, the original performance will not be sufficient. Therefore, there is a need for a one-pack curable silicone composition that has storage stability and does not require mixing prior to use.

Patent Document 1: Japanese Patent Application Laid-Open No. H11-001619 Patent Document 2: Japanese Patent Application Laid-Open No. 2004-143361 Patent Document 3: Japanese Patent Application Laid-Open No. 2005-076003

It is an object of the present invention to provide a one-pack type curable silicone composition having storage stability as well as a highly reliable optical semiconductor device using the composition.

In the one-pack type curable silicone composition of the present invention,

(A) the following average unit formula:

(R 1 SiO 3/2) a (R 1 2 SiO 2/2) b (R 1 3 SiO 1/2) c (SiO 4/2) d (XO 1/2) e

(Wherein, R 1 has only the same or different 1 represent a hydrocarbon group, a 5 mol% is alkenyl group of R 1 in the molecule is at least 30 mol% of R 1 is an aryl group; X is a hydrogen atom or an alkyl A represents a positive integer, b represents 0 or a positive integer, c represents 0 or a positive integer, d represents a number of 0 to 0.3, e represents a number of 0 to 0.4 , b / a is a number from 0 to 10, c / a is a number from 0 to 5, and a + b + c + d = 1; And

(B) the following components (i) to (iii) comprise a premixed mixture:

(i) a compound represented by the general formula:

HR 2 2 SiO (R 2 2 SiO) m SiR 2 2 H

(Wherein R 2 represents an identical or different monovalent hydrocarbon group lacking an aliphatic unsaturated bond, more than 15 mol% of R 2 in one molecule is an aryl group, and m is an integer of 1 to 100) Polysiloxanes;

(ii) a hydrosilylation reaction metal catalyst in an amount such that the catalyst metal is in the range of 0.01 to 1,000 ppm by mass with respect to the component (B); And

(iii)

R 3 2 NR 4 -NR 3 2

(B) represented by the general formula (1), wherein R 3 is the same or different and represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and R 4 represents an alkylene group having 2 to 4 carbon atoms, ≪ / RTI > to 1,000 ppm.

The component (ii) in component (B) is preferably a platinum-alkenylsiloxane complex and component (iii) is preferably N, N, N ', N'-tetramethylethylenediamine.

The composition preferably comprises (C) a compound represented by the general formula:

R 5 3 SiO (R 5 2 SiO) n SiR 5 3

Wherein at least two of R 5 in the molecule are alkenyl groups and at least 20 mol% of R 5 is an aryl group, and n is an integer of 5 to 1,000, in which R 5 represents the same or different monovalent hydrocarbon groups, ) In an amount of 100 parts by mass or less per 100 parts by mass of the component (A).

The present composition preferably comprises (D)

(HR 6 2 SiO 1/2) f (R 6 SiO 3/2) g (R 6 2 SiO 2/2) h (R 6 3 SiO 1/2) i (SiO 4/2) j (YO 1 / 2 ) k

(Wherein, R 6 has only the same or a different one aliphatic unsaturated bond lacking represent a hydrocarbon group, at least 10 mole% of R 6 in one molecule is an aryl group; Y represents a hydrogen atom or alkyl; f is a positive J represents a number of 0 to 0.3, and k represents a number of 0 to 0.4, preferably 0 to 0. < RTI ID = 0.0 > G / h + i + j = 1), wherein f / g is a number from 0.1 to 4, h / g is a number from 0 to 10, i / g is a number from 0 to 5, Is used in an amount such that the silicon-bonded hydrogen atoms in component (D) are preferably from 1 to 20 mole percent of the total silicon-bonded hydrogen atoms in component (B) and component (D) .

In the optical semiconductor device of the present invention, the optical semiconductor element is sealed, protected, or covered with a cured product of the one-pack type curable silicone composition described above.

The one-pack type curable silicone composition of the present invention has storage stability and the optical semiconductor device of the present invention has reliability.

1 is a sectional view of an LED which is an example of the optical semiconductor device of the present invention.

First, the one-pack type curable silicone composition of the present invention will be described in detail.

Component (A) is a branched chain organopolysiloxane which is the main material of the composition and is represented by the following average unit formula:

(R 1 SiO 3/2 ) a (R 1 2 SiO 2/2 ) b (R 1 3 SiO 1/2 ) c (SiO 4/2 ) d (XO 1/2 ) e

In the above formula, R 1 represents the same or different monovalent hydrocarbon group. Specific examples include an alkyl group such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group; An alkenyl group such as a vinyl group, an allyl group, a butenyl group, a pentenyl group, a hexenyl group; An aryl group such as a phenyl group, a tolyl group, a xylyl group; An aralkyl group such as a benzyl group or a phenethyl group; Halogenated alkyl groups such as the 3-chloropropyl group, and the 3,3,3-trifluoropropyl group. However, at least 5 mol% of R 1 in one molecule is an alkenyl group, and preferably at least 10 mol% of R 1 is an alkenyl group. Furthermore, at least 30 mol% of R 1 is an aryl group, and preferably at least 40 mol% of R 1 is an aryl group. This is because, due to refraction, reflection, or dispersion, attenuation of light from the resulting cured product is reduced . Furthermore, in the above formula, X represents a hydrogen atom or an alkyl group. Examples of such alkyl groups include methyl, ethyl, propyl, and butyl.

B represents 0 or a positive integer; c represents 0 or a positive integer; d represents a number of 0 to 0.3; and e represents a number of 0 to 0.4. B / a represents a number of 0 to 10, c / a represents a number of 0 to 5, and a + b + c + d = 1.

Component (B) is a crosslinking agent of the present composition, and a catalyst for promoting such crosslinking. (I) a compound represented by the general formula:

HR 2 2 SiO (R 2 2 SiO) m SiR 2 2 H

(Ii) a hydrosilylation reaction metal-based catalyst and (iii) an organopolysiloxane represented by the following general formula:

R 4 2 NR 5 -NR 4 2

With an amine compound represented by the following formula (1).

In component (i), R 2 represents an identical or different monovalent hydrocarbon group lacking an aliphatic unsaturated bond. Specific examples include alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group; An aryl group such as a phenyl group, a tolyl group, a xylyl group; Aralkyl groups such as benzyl or phenethyl; Halogenated alkyl groups such as the 3-chloropropyl group, and the 3,3,3-trifluoropropyl group. However, at least 15 mol% of R 2 in one molecule is an aryl group, it is preferably 30 mol% or more is an aryl group of R 2 or R 2 of 20 mol% or more. This is because, due to refraction, reflection, or dispersion, the attenuation of light from the resulting cured product is reduced. Further, in the above formula, m represents an integer of 1 to 100, preferably an integer of 1 to 50, and most preferably an integer of 1 to 20. [ This is because, when m is less than the maximum value in the above-mentioned range, work efficiency in handling the resulting composition is improved.

Examples of component (ii) include a platinum catalyst, a rhodium catalyst and a palladium catalyst, and a platinum catalyst is preferred. Examples of such platinum catalysts include fine platinum powder, chloroplatinic acid, alcoholic solution of chloroplatinic acid, platinum-alkenylsiloxane complexes, platinum-olefin complexes, and platinum-carbonyl complexes. Platinum-alkenylsiloxane complexes are preferred. Examples of the alkenylsiloxane include 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane , Alkenylsiloxanes in which a part of the methyl groups of such alkenylsiloxanes are substituted with ethyl groups, phenyl groups, etc., and alkenylsiloxanes in which the vinyl groups of such alkenylsiloxanes are substituted with allyl groups, hexenyl groups, and the like. 1,3-divinyl-l, l, 3,3-tetramethyldisiloxane is preferred due to its excellent stability.

Further, in order to further improve the stability of such platinum-alkenylsiloxane complexes, alkenylsiloxanes such as 1,3-diallyl-1,1,3,3-tetramethyldisiloxane, 1,3- Diphenyl-1,3-dimethyl-1,3-diphenyldisiloxane, 1,3-divinyl-1,1,3,3-tetraphenyldisiloxane, 1,3,5,7-tetramethyl- 1,3,5,7-tetravinylcyclotetrasiloxane or an organosiloxane oligomer, such as a dimethylsiloxane oligomer, is preferably added to such a platinum-alkenylsiloxane complex.

The amount of the component (ii) to be added is such that the catalytic metal contained in the component (ii) reaches 0.01 to 1,000 ppm by mass in the component (B). Preferably, the amount is 0.1 to 1,000 ppm, or 0.1 to 500 ppm.

In the above formula, R 3 in component (iii) represents the same or different hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Examples of such an alkyl group include a methyl group, an ethyl group, a propyl group, and a butyl group. R 4 represents an alkylene group having 2 to 4 carbon atoms. Examples of such an alkylene group include an ethylene group, a propylene group, a methylmethylene group and a methylethylene group.

Examples of component (iii) include N, N, N ', N'-tetramethylethylenediamine, N, N-dimethylethylenediamine, N, Diamine, N, N, N ', N'-tetraethylethylenediamine.

Component (iii) is known as a reaction inhibitor in a hydrosilylation-curable silicone composition, but in conventional compositions these components are solely contained alone, while the storage stability of the one-part curable silicone composition is better than the composition ) And component (ii). ≪ / RTI >

The amount of the component (iii) added is 0.5 to 1,000 ppm, and preferably 1 to 400 ppm, in terms of mass in the component (B).

Component (B) is prepared by mixing components (i) to (iii) described above, but these components may be heated or may be cured at room temperature after mixing.

The content of component (B) in the present composition is 0.1 to 5 moles, and preferably 0.5 to 2 moles, of silicon-bonded hydrogen atoms in component (i) per mole of alkenyl group in component (A). This is because when the content of the component (B) is not lower than the lower limit of the above-mentioned range, the composition is sufficiently cured and the content of the component (B) is not more than the upper limit of the above-mentioned range, the heat resistance of the obtained cured product is improved.

To adjust the hardness of the resulting cured product, the present composition preferably comprises (C)

R 5 3 SiO (R 5 2 SiO) n SiR 5 3

Of the present invention may include a straight-chain organopolysiloxane represented by the following formula

In the above formula, R 5 represents the same or different monovalent hydrocarbon groups. An example is a group similar to that presented above for R < 1 >. However, two or more of R < 5 > in one molecule is an alkenyl group. In addition, at least 20 mol% of R 5 in one molecule is an aryl group. Preferably, at least 30 mol% of R 5 is an aryl group, and more preferably at least 40 mol% of R 5 is an aryl group. This is because, due to refraction, reflection, or dispersion, the attenuation of light from the resulting cured product is reduced. In addition, n is an integer of 5 to 1,000, preferably an integer of 5 to 100, and more preferably an integer of 5 to 50.

There is no particular limitation on the content of the component (C) in the present composition, but the content is preferably 100 parts by mass or less per 100 parts by mass of the component (A) so as not to significantly decrease the hardness of the resulting cured product, 70 parts by mass or less. Moreover, in order to suitably adjust the hardness of the resulting cured product and adjust the hardness of the resulting cured product, the above content is preferably more than 1 part by mass, more preferably more than 5 parts by mass, per 100 parts by mass of component (A).

In order to adjust the hardness of the resultant cured product and to impart mechanical strength, the composition preferably further comprises (D)

(HR 6 2 SiO 1/2) f (R 6 SiO 3/2) g (R 6 2 SiO 2/2) h (R 6 3 SiO 1/2) i (SiO 4/2) j (YO 1 / 2 ) k

Lt; RTI ID = 0.0 > organopolysiloxanes < / RTI >

In the above formula, R 6 represents the same or different monovalent hydrocarbon group lacking an aliphatic unsaturated bond. A specific example is a group similar to that shown in the above-mentioned R 2 . However, at least 10 mol% of R 6 in one molecule is an aryl group. At least 15 mol% of R 6 is preferably an aryl group, and more preferably at least 20 mol% of R 6 is an aryl group. This is because, due to refraction, reflection, or dispersion, the attenuation of light from the resulting cured product is reduced. Furthermore, in the above formula, Y represents a hydrogen atom or an alkyl group. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group and a butyl group.

Wherein h represents 0 or a positive integer, i represents 0 or a positive integer, j represents a number of 0 to 0.3, and k represents 0 or a positive integer, and f represents a positive integer, g represents a positive integer, G represents a number of from 0 to 10, i / g represents a number of from 0 to 50, f + g + h represents a number of from 0 to 4, f / g represents a number of from 0.1 to 4, h / + i + j = 1.

There is no particular limitation on the content of the component (D) in the composition. The content of silicon-bonded hydrogen atoms in component (D) is between 1 and 20 of the total silicon-bonded hydrogen atoms in component (B) and component (D) to give a suitable hardness and mechanical strength to the resulting cured product. Mol%, preferably 2 to 20 mol%, and more preferably 2 to 10 mol%. This is because, if the content of the component (D) exceeds the minimum value in the above-mentioned range, mechanical strength can be imparted to the resulting cured product. On the other hand, if the content is below the maximum value in the above-mentioned range, appropriate hardness can be imparted to the resulting cured product.

2-ol, 3,5-dimethyl-1-hexyn-3-ol or 2-phenyl-3-butyn- Come; Ene-in compounds such as 3-methyl-3-pentene-1-yl or 3,5-dimethyl-3-hexene-1-yl; Or 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetrahexenylcyclotetra Siloxanes or benzotriazoles may be included as optional ingredients in the compositions of the present invention. There is no particular limitation on the content of such an inhibitor, but it is preferably in the range of 0.0001 to 5 parts by mass per 100 parts by mass of the composition.

The composition of the present invention may also contain an adhesion-imparting agent to improve the adhesion of the composition. A preferred adhesive-imparting agent is an organosilicon compound having at least one alkoxy group bonded to a silicon atom in one molecule. Such alkoxy groups are exemplified by methoxy, ethoxy, propoxy, butoxy, and methoxyethoxy groups; Particularly preferred is a methoxy group. Furthermore, the non-alkoxy group bonded to the silicon atom of such an organosilicon compound is a substituted or unsubstituted monovalent hydrocarbon group such as an alkyl group, an alkenyl group, an aryl group, an aralkyl group, a halogenated alkyl group and the like; Glycidoxyalkyl groups such as 3-glycidoxypropyl group, 4-glycidoxybutyl group and the like; An epoxy cyclohexyl alkyl group such as a 2- (3,4-epoxycyclohexyl) ethyl group and a 3- (3,4-epoxycyclohexyl) propyl group; Oxiranyl alkyl groups such as 4-oxiranylbutyl group, 8-oxiranyloctyl group and the like; Acrylic group-containing monovalent organic groups such as 3-methacryloxypropyl group and the like; And hydrogen atoms. Such an organosilicon compound preferably has a group capable of reacting with an alkenyl group or a silicon-bonded hydrogen atom in the present composition. Specifically, such an organosilicon compound preferably has a silicon-bonded alkenyl group or a silicon-bonded hydrogen atom. Furthermore, since such an organic silicon compound preferably has at least one epoxy group-containing monovalent organic group in one molecule, as it can give good adhesion to various types of substrates. Organosilicon compounds of this type are exemplified by organosilane compounds, organosiloxane oligomers and alkyl silicates. The molecular structure of the organosiloxane oligomer or alkyl silicate is exemplified by a linear structure, a partially branched linear structure, a branched structure, a cyclic structure, and a network structure. A linear chain structure, a branched chain structure, and a network structure are particularly preferable. Organosilicon compounds of this type include silane compounds such as 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-methacryloxypropyltrimethoxy Silane and the like; A siloxane compound having at least one silicon-bonded alkenyl group or silicon-bonded hydrogen atom in one molecule, and at least one silicon-bonded alkoxy group; A silane compound having at least one silicon-bonded alkoxy group or a mixture of a siloxane compound and at least one siloxane compound having at least one silicon-bonded hydroxyl group and at least one silicon-bonded alkenyl group in one molecule; And methyl polysilicate, ethyl polysilicate, and epoxy group-containing ethyl polysilicate. There is no particular limitation on the content of the adhesive-imparting agent in the present composition. Such an adhesive-imparting agent in a range of 0.01 to 10 parts by mass per 100 parts by mass of the composition is preferred.

Furthermore, inorganic fillers such as silica, glass, alumina or zinc oxide; Organic resin fine powder such as polymethacrylate resin; A heat resistant agent, a dye, a pigment, a flame retardant, a solvent, etc. may be included as a selective component in the composition of the present invention at a level at which the object of the present invention is not impaired.

Curing of the composition is promoted by heating, and heating to a temperature in the range of 50 to 200 DEG C is preferred to promote curing.

In addition, the composition has adequate storage stability even at temperatures of 25 占 폚, but is preferably cooled to a temperature of 5 占 폚 or lower.

The optical semiconductor device of the present invention will now be described in detail.

The optical semiconductor device of the present invention is characterized in that its optical semiconductor element is sealed, protected or covered with a cured product of the one-pack type curable silicone composition described above. The light emitting diode element is an example of such a optical semiconductor element. Another example of such optical semiconductor device is a light emitting diode (LED).

1 shows a cross-sectional view of an example of a surface mount LED of such an apparatus. In the LED device shown in Fig. 1, the optical semiconductor element 1 is die-bonded on a lead frame 2. The optical semiconductor element 1 and the lead frame 3 are wire-bonded by the bonding wire 4. Further, a frame material 5 is provided around the optical semiconductor element 1. [ The optical semiconductor element 1 in this frame material 5 is sealed by the cured product 6 of the one-pack type curable silicone composition according to the present invention.

In the method of manufacturing the surface-mounted LED shown in Fig. 1, the semiconductor element 1 is die-bonded to the lead frame 2. Fig. After the optical semiconductor element 1 and the lead frame 3 are wire-bonded by the gold bonding wire 4, the one-pack type curable silicone composition according to the present invention is packaged in such a frame material 5. Then, the optical semiconductor element 1 is sealed with the cured product 6 by heating at a temperature in the range of 50 to 200 ° C.

Example

The one-pack type curable silicone composition of the present invention as well as the optical semiconductor device will be described in detail by examples. Note that the viscosity is a value obtained at 25 占 폚. In the above formula, Me, Ph, and Vi represent a methyl group, a phenyl group, and a vinyl group, respectively.

The properties of the one-part curable silicone composition were evaluated as follows.

[Curing speed]

Alpha Technologies Rheometer MDR2000P was used to measure the torque change of the one-part curable silicone composition at 150 占 폚. The TS-1 (TS-1) was used as an index of the hardening speed. The TS-1 was measured as the time until the torque value reached 1 dNm immediately after starting the torque measurement.

[Change in viscosity]

The viscosity change of the one-pack type curable silicone composition at 25 占 폚 was measured using AR 550 from TA Instruments under the condition of a shear rate of 20 (1 / s).

[Example 1]

The following formula:

HMe 2 SiO (Ph 2 SiO) SiMe 2 H

100 parts by mass of an organopolysiloxane (content of silicon-bonded hydrogen atoms = 0.60% by mass, content of phenyl groups in all silicon-bonded organic groups = 33% by mole) represented by the following formula , 1,3,3-tetramethyldisiloxane complex (the amount by which platinum metal is 12 ppm in mass per such mixture), and N, N, N ', N'-tetramethylethylenediamine 100 ppm by mass) was uniformly mixed and cured at room temperature for 1 day.

Next, in the production of the one-pack type curable silicone composition, 20 parts by mass of this mixture was added in the following average unit formula:

(PhSiO 3/2 ) 0.75 (ViMe 2 SiO 1/2 ) 0.25

(Vinyl group content = 5.6 mass%, vinyl group content in the total silicon-bonded organic groups = 17 mole%, phenyl group content in the total silicon-bonded organic groups = 50 mole%) represented by the following formula Part number average molecular weight is 2,260, and the following average unit formula:

(PhSiO 3/2 ) 0.40 (HMe 2 SiO 1/2 ) 0.60

3 parts by mass of a branched chain organopolysiloxane (content of silicon-bonded hydrogen atoms = 0.65% by mass, content of phenyl groups in all silicon-bonded organic groups = 25% by mole)

ViMe 2 SiO (PhMeSiO) 26 SiViMe 2

, 18 parts by mass of an organopolysiloxane represented by the following formula (content of vinyl groups = 1.4% by mass, content of phenyl groups in all silicon-bonded organic groups = 45% by mole), and 0.2 parts by mass of tetramethyltetravinylcyclotetrasiloxane . Table 1 shows the properties of this composition.

[Example 2]

The following formula:

HMe 2 SiO (Ph 2 SiO) SiMe 2 H

100 parts by mass of an organopolysiloxane (content of silicon-bonded hydrogen atoms = 0.60% by mass, content of phenyl groups in all silicon-bonded organic groups = 33% by mole) represented by the following formula , 1,3,3-tetramethyldisiloxane complex (the amount by which platinum metal is 16 ppm by mass for this mixture), and N, N, N ', N'-tetramethylethylenediamine 25 parts per million by mass) was uniformly mixed and cured at room temperature for 1 day.

Next, in the production of the one-pack type curable silicone composition, 20 parts by mass of this mixture was added in the following average unit formula:

(PhSiO 3/2 ) 0.75 (ViMe 2 SiO 1/2 ) 0.25

(Vinyl group content = 5.6 mass%, vinyl group content in the total silicon-bonded organic groups = 17 mole%, phenyl group content in the total silicon-bonded organic groups = 50 mole%) represented by the following formula Part number average molecular weight is 2,260, and the following average unit formula:

(PhSiO 3/2 ) 0.40 (HMe 2 SiO 1/2 ) 0.60

3 parts by mass of an organopolysiloxane (content of silicon-bonded hydrogen atoms = 0.65 mass%, content of phenyl groups in all silicon-bonded organic groups = 25 mol%) represented by the following formula:

ViMe 2 SiO (PhMeSiO) 26 SiViMe 2

, 18 parts by mass of an organopolysiloxane represented by the following formula (content of vinyl groups = 1.4% by mass, content of phenyl groups in all silicon-bonded organic groups = 45% by mole), and 0.2 parts by mass of tetramethyltetravinylcyclotetrasiloxane . Table 1 shows the properties of the composition.

[Comparative Example 1]

In the preparation of the one-pack type curable silicone composition,

HMe 2 SiO (Ph 2 SiO) SiMe 2 H

20 parts by mass of an organopolysiloxane represented by the following formula (content of silicon-bonded hydrogen atoms = 0.60% by mass, content of phenyl groups in all silicon-bonded organic groups = 33% by mole)

(PhSiO 3/2 ) 0.75 (ViMe 2 SiO 1/2 ) 0.25

(Vinyl group content = 5.6 mass%, vinyl group content in the total silicon-bonded organic groups = 17 mole%, phenyl group content in the total silicon-bonded organic groups = 50 mole%) represented by the following formula Part number average molecular weight is 2,260, and the following average unit formula:

(PhSiO 3/2 ) 0.40 (HMe 2 SiO 1/2 ) 0.60

3 parts by mass of an organopolysiloxane (content of silicon-bonded hydrogen atoms = 0.65 mass%, content of phenyl groups in all silicon-bonded organic groups = 25 mol%) represented by the following formula:

ViMe 2 SiO (PhMeSiO) 26 SiViMe 2

18 parts by mass of an organopolysiloxane represented by the following formula (content of vinyl group = 1.4% by mass, content of phenyl group in all silicon-bonded organic groups = 45% by mole), 1,3-divinyl- , 3-tetramethyldisiloxane complex (the amount by which the platinum metal is 2.6 ppm in mass per such mixture), 0.2 part by mass of 1-ethenyl-1-cyclohexanol and 0.2 parts by mass of tetramethyltetravinylcyclotetrasiloxane And uniformly mixed. Table 1 shows the properties of the composition.

[Table 1]

Figure pct00001

Industrial availability

The one-pack type curable silicone composition of the present invention has excellent storage stability, does not require mixing before use, and forms a cured product having high refractive index and high light transmittance. As a result, it is ideal as a sealant, adhesive, coating agent or protective agent for optical semiconductor devices.

Explanation of symbols

One Optical semiconductor element

2 Lead frame

3 Lead frame

4 Bonding wire

5 Frame material

6 The cured product of the one-pack type curable silicone composition

Claims (6)

(A) the following average unit formula:
(R 1 SiO 3/2 ) a (R 1 2 SiO 2/2 ) b (R 1 3 SiO 1/2 ) c (SiO 4/2 ) d (XO 1/2 ) e
(Wherein, R 1 has only the same or different 1 represent a hydrocarbon group, a 5 mol% is alkenyl group of R 1 in the molecule is at least 30 mol% of R 1 is an aryl group; X is a hydrogen atom or an alkyl A represents a positive integer, b represents 0 or a positive integer, c represents 0 or a positive integer, d represents a number of 0 to 0.3, e represents a number of 0 to 0.4 , b / a is a number from 0 to 10, c / a is a number from 0 to 5, and a + b + c + d = 1; And
(B) a one-pack type curable silicone composition comprising the following components (i) to (iii) in a premixed mixture:
(i) a compound represented by the general formula:
HR 2 2 SiO (R 2 2 SiO) m SiR 2 2 H
(Wherein R 2 represents an identical or different monovalent hydrocarbon group lacking an aliphatic unsaturated bond, more than 15 mol% of R 2 in one molecule is an aryl group, and m is an integer of 1 to 100) Polysiloxane,
(ii) a hydrosilylation reaction metal catalyst in an amount such that the catalyst metal is in the range of 0.01 to 1,000 ppm by mass with respect to the component (B); And
(iii)
R 3 2 NR 4 -NR 3 2
(B) represented by the general formula (1), wherein R 3 is the same or different and represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and R 4 represents an alkylene group having 2 to 4 carbon atoms, ≪ / RTI > to 1,000 ppm.
The one-part curable silicone composition of claim 1, wherein component (ii) in component (B) is a platinum-alkenylsiloxane complex. 3. The one-part curable silicone composition according to claim 1 or 2, wherein component (iii) in component (B) is N, N, N ', N'-tetramethylethylene diamine. 4. The composition according to any one of claims 1 to 3, which comprises (C)
R 5 3 SiO (R 5 2 SiO) n SiR 5 3
Wherein at least two of R 5 in the molecule are alkenyl groups and at least 20 mol% of R 5 is an aryl group, and n is an integer of 5 to 1,000, in which R 5 represents the same or different monovalent hydrocarbon groups, ) In an amount of 100 parts by mass or less per 100 parts by mass of the component (A), based on 100 parts by mass of the linear organopolysiloxane.
The positive resist composition according to any one of claims 1 to 4, wherein (D)
(HR 6 2 SiO 1/2) f (R 6 SiO 3/2) g (R 6 2 SiO 2/2) h (R 6 3 SiO 1/2) i (SiO 4/2) j (YO 1 / 2 ) k
(Wherein, R 6 has only the same or a different one aliphatic unsaturated bond lacking represent a hydrocarbon group, at least 10 mole% of R 6 in one molecule is an aryl group; Y represents a hydrogen atom or alkyl; f is a positive J represents a number of 0 to 0.3, and k represents a number of 0 to 0.4, preferably 0 to 0. < RTI ID = 0.0 > G / h + i + j = 1), wherein f / g is a number from 0.1 to 4, h / g is a number from 0 to 10, i / g is a number from 0 to 5, Is used in an amount such that the silicon-bonded hydrogen atoms in component (D) are preferably from 1 to 20 mole percent of the total silicon-bonded hydrogen atoms in component (B) and component (D) Lt; RTI ID = 0.0 > 1 < / RTI >
Wherein the optical semiconductor element is sealed, protected, or covered with a cured product of the one-pack type curable silicone composition according to any one of claims 1 to 5.
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