JP2000327921A - Curable silicone composition - Google Patents

Curable silicone composition

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Publication number
JP2000327921A
JP2000327921A JP2000022621A JP2000022621A JP2000327921A JP 2000327921 A JP2000327921 A JP 2000327921A JP 2000022621 A JP2000022621 A JP 2000022621A JP 2000022621 A JP2000022621 A JP 2000022621A JP 2000327921 A JP2000327921 A JP 2000327921A
Authority
JP
Japan
Prior art keywords
component
amount
mol
units
sio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000022621A
Other languages
Japanese (ja)
Inventor
Akihiro Nakamura
昭宏 中村
Hiroshi Enami
博司 江南
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DuPont Toray Specialty Materials KK
Original Assignee
Dow Corning Toray Silicone Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Corning Toray Silicone Co Ltd filed Critical Dow Corning Toray Silicone Co Ltd
Priority to JP2000022621A priority Critical patent/JP2000327921A/en
Publication of JP2000327921A publication Critical patent/JP2000327921A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a curable silicone composition capable of being cured through hydrosilylation reaction to form a cured silicone material having excellent repairing properties. SOLUTION: This curable silicone composition comprises (A) an organopolysiloxane comprising a unit of R12SiO2/2 in an amount of 80-96.5 mol%, a unit of R1SiO3/2 in an amount of 1.0-10.0 mol%, a unit of R13SiO1/2 in an amount of 0-6.0 mol%, and a unit of R12SiO1/2 in an amount of 0.25-4.0 mol% (R1 is a monovalent hydrocarbon; R2 is an alkenyl), (B) a diorganopolysiloxane having two or more alkenyl groups in a molecule in average, (C) an organopolysiloxane having two or more hydrogen atoms bonding to silicon atoms in a molecule in average (in such an amount that a mole ratio of the hydrogen atoms bonding to the silicon atoms in the component C to the total amount of the alkenyl groups in the component A and the component B attains to a range of 0.7 to 1.5), (D) a platinum-based catalyst for hydrosilylation reaction, and (E) alumina powder.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は硬化性シリコーン組
成物に関し、詳しくは、ヒドロシリル化反応により硬化
して、リペア性が優れるシリコーン硬化物を形成する硬
化性シリコーン組成物に関する。
The present invention relates to a curable silicone composition, and more particularly, to a curable silicone composition which is cured by a hydrosilylation reaction to form a cured silicone product having excellent repairability.

【0002】[0002]

【従来の技術】アルケニル基を有する分岐鎖状のオルガ
ノポリシロキサン、ケイ素原子結合水素原子を有するオ
ルガノポリシロキサン、およびヒドロシリル化反応用白
金系触媒からなる硬化性シリコーン組成物、さらには任
意の成分としてシリカ粉末等の無機充填剤を含有する硬
化性シリコーン組成物は、例えば、特開昭58−745
2号公報、特開昭62−181357号公報、特開昭6
3−246856号公報、特開平5−70693号公
報、および特開平10−212413号公報に提案され
ている。
2. Description of the Related Art A curable silicone composition comprising a branched-chain organopolysiloxane having an alkenyl group, an organopolysiloxane having a silicon-bonded hydrogen atom, and a platinum-based catalyst for a hydrosilylation reaction. Curable silicone compositions containing an inorganic filler such as silica powder are disclosed, for example, in JP-A-58-745.
No. 2, JP-A-62-181357, JP-A-62-181357
It has been proposed in JP-A-3-246856, JP-A-5-70693, and JP-A-10-212413.

【0003】このような硬化性シリコーン組成物は、I
C、MPU、トランジスター等の電気・電子部品の封止
・充填剤として使用されている(特開昭63−2468
56号公報、および特開平10−212413号公報参
照)が、硬化して得られる低硬度のシリコーンゴムある
いはシリコーンゲルは強度や伸びが低いために、電気・
電子部品の交換や修理を行なうためにこれを除去しよう
とすると、亀裂を生じてきれいに剥がすことができず、
リペア性が悪いという問題があった。
[0003] Such a curable silicone composition comprises I
It is used as a sealing and filling agent for electric and electronic parts such as C, MPU and transistor (Japanese Patent Application Laid-Open No. 63-2468).
No. 56 and Japanese Unexamined Patent Publication No. 10-212413), but the low hardness silicone rubber or silicone gel obtained by curing has low strength and low elongation.
If you try to remove it to replace or repair electronic components, it will crack and cannot be removed cleanly,
There was a problem of poor repairability.

【0004】[0004]

【発明が解決しようとする課題】本発明者らは、上記の
課題について鋭意検討した結果、本発明に到達した。す
なわち、本発明の目的は、ヒドロシリル化反応により硬
化して、リペア性が優れるシリコーン硬化物を形成する
硬化性シリコーン組成物を提供することにある。
DISCLOSURE OF THE INVENTION The present inventors have intensively studied the above-mentioned problems, and as a result, have reached the present invention. That is, an object of the present invention is to provide a curable silicone composition which is cured by a hydrosilylation reaction to form a cured silicone product having excellent repairability.

【0005】[0005]

【課題を解決するための手段】本発明の硬化性シリコー
ン組成物は、(A)80〜96.5モル%のR1 2SiO2/2
単位、1.0〜10.0モル%のR1SiO3/2単位、0〜
6.0モル%のR1 3SiO1/2単位、および0.25〜4.
0モル%のR1 22SiO1/2単位からなるオルガノポリ
シロキサン{式中、R1は脂肪族不飽和結合を有しない
一価炭化水素基であり、R2はアルケニル基であ
る。}、(B)25℃における粘度が1〜100,000m
Pa・sであり、一分子中に平均2個以上のアルケニル基を
有するジオルガノポリシロキサン{上記(A)成分と本成
分の合計量中で10〜90重量%となる量}、(C)25
℃における粘度が1〜100,000mPa・sであり、一分
子中に平均2個以上のケイ素原子結合水素原子を有する
オルガノポリシロキサン{上記(A)成分中のアルケニル
基と(B)成分中のアルケニル基の合計に対する本成分中
のケイ素原子結合水素原子のモル比が0.7〜1.5とな
る量}、(D)ヒドロシリル化反応用白金系触媒{上記
(A)成分〜(C)成分の合計量に対して、本成分中の白金
金属が重量単位で0.01〜1,000ppmとなる量}、
および(E)アルミナ粉末{上記(A)成分と(B)成分の合
計量100重量部に対して、200〜1,500重量部
となる量}からなることを特徴とする。
Means for Solving the Problems] The curable silicone composition of the present invention, (A) from 80 to 96.5 mol% of R 1 2 SiO 2/2
Units, 1.0 to 10.0 mol% of R 1 SiO 3/2 units,
6.0 mol% of R 1 3 SiO 1/2 units, and 0.25 to 4.
During 0 mole% of R 1 2 R 2 SiO 1/2 organopolysiloxane {equation composed of units, R 1 is monovalent hydrocarbon group with no aliphatic unsaturated bonds, R 2 is an alkenyl group. }, (B) viscosity at 25 ° C. is 1 to 100,000 m
Pa.s, a diorganopolysiloxane having an average of two or more alkenyl groups in one molecule {an amount of 10 to 90% by weight in the total amount of the above component (A) and this component}, (C) 25
Organopolysiloxane having a viscosity at 1 ° C. of 1 to 100,000 mPa · s and having an average of two or more silicon-bonded hydrogen atoms in one molecule. The alkenyl group in the component (A) and the component (B) An amount in which the molar ratio of silicon-bonded hydrogen atoms in this component to the total alkenyl groups is 0.7 to 1.5 {(D) a platinum-based catalyst for hydrosilylation reaction}
(A) The amount of platinum metal in this component is 0.01 to 1,000 ppm by weight based on the total amount of components (C) to (C),
And (E) alumina powder {amount of 200 to 1,500 parts by weight based on 100 parts by weight of the total of the above components (A) and (B)}.

【0006】[0006]

【発明の実施の形態】本発明の硬化性シリコーン組成物
を詳細に説明する。(A)成分のオルガノポリシロキサン
は、R1 2SiO2/2単位、R1SiO3/2単位、R1 22
iO1/2単位、および任意のシロキサン単位として、R1
3SiO1/ 2単位からなることを特徴とする。これらの単
位中のR1は脂肪族不飽和結合を有しない一価炭化水素
基であり、メチル基、エチル基、プロピル基等のアルキ
ル基;フェニル基、トリル基、キシリル基等のアリール
基;ベンジル基、フェネチル基等のアラルキル基;3−
クロロプロピル基、3,3,3−トリフルオロプロピル基
等のハロゲン化アルキル基が例示される。また、R2
アルケニル基であり、ビニル基、アリル基、ブテニル
基、ペンテニル基、ヘキセニル基が例示され、好ましく
は、ビニル基である。
BEST MODE FOR CARRYING OUT THE INVENTION The curable silicone composition of the present invention will be described in detail. (A) The organopolysiloxane of the component, R 1 2 SiO 2/2 units, R 1 SiO 3/2 units, R 1 2 R 2 S
As an iO 1/2 unit and an optional siloxane unit, R 1
Characterized by comprising the 3 SiO 1/2 units. R 1 in these units is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and is an alkyl group such as a methyl group, an ethyl group, or a propyl group; an aryl group such as a phenyl group, a tolyl group, or a xylyl group; Aralkyl groups such as benzyl group and phenethyl group; 3-
Examples are halogenated alkyl groups such as a chloropropyl group and a 3,3,3-trifluoropropyl group. R 2 is an alkenyl group, and is exemplified by a vinyl group, an allyl group, a butenyl group, a pentenyl group, and a hexenyl group, and is preferably a vinyl group.

【0007】このような(A)成分のオルガノポリシロキ
サンにおいて、R1 2SiO2/2単位の含有量は80〜9
6.5モル%の範囲内であり、R1SiO3/2単位の含有
量は1.0〜10.0モル%の範囲内であり、R1 22
iO1/2単位の含有量は0.25〜4.0モル%の範囲内
であり、また、任意のシロキサン単位であるR1 3SiO
1/2単位の含有量は0〜6.0モル%の範囲内である。こ
れは、R1SiO3/2単位の含有量が上記範囲の下限未満
であるオルガノポリシロキサンを用いて得られるシリコ
ーン硬化物は物理的特性、特に、強度が低下する傾向が
あるからであり、一方、上記範囲の上限をこえるオルガ
ノポリシロキサンは著しく粘度が高くなり、これを用い
て得られる硬化性シリコーン組成物の取扱作業性や流動
性が著しく低下する傾向があるからである。
[0007] The content of the organopolysiloxane of component (A), R 1 2 SiO 2/2 units 80-9
In the range of 6.5 mol%, the content of R 1 SiO 3/2 units is in the range of 1.0 to 10.0 mol%, R 1 2 R 2 S
The content of iO 1/2 units is in the range of 0.25 to 4.0 mol%, also, R 1 3 SiO is any siloxane units
The content of 1/2 unit is in the range of 0 to 6.0 mol%. This is because a cured silicone product obtained using an organopolysiloxane having a content of R 1 SiO 3/2 units less than the lower limit of the above range tends to have reduced physical properties, particularly strength. On the other hand, organopolysiloxanes exceeding the upper limit of the above range have a remarkably high viscosity, and the curability of the curable silicone composition obtained by using the same tends to significantly lower the workability and fluidity.

【0008】(B)成分のジオルガノポリシロキサンは、
25℃における粘度が1〜100,000mPa・sであり、
一分子中に平均2個以上のアルケニル基を有することを
特徴とする。(B)成分中のアルケニル基としては、上記
2で例示した基が挙げられ、特に、ビニル基であるこ
とが好ましい。また、(B)成分中のアルケニル基以外の
ケイ素原子結合の基としては、上記R1で例示した一価
炭化水素基が挙げられ、特に、メチル基、フェニル基で
あることが好ましい。このような(B)成分の分子構造は
実質的に直鎖状であるが、分子鎖の一部が分岐していて
もよい。
The diorganopolysiloxane of the component (B) is
The viscosity at 25 ° C. is 1 to 100,000 mPa · s,
It is characterized by having an average of two or more alkenyl groups in one molecule. Examples of the alkenyl group in the component (B) include the groups exemplified for R 2 above, and particularly preferably a vinyl group. As the silicon-bonded groups other than alkenyl groups in component (B), include exemplified monovalent hydrocarbon groups in the above R 1, especially, a methyl group is preferably a phenyl group. Although the molecular structure of the component (B) is substantially linear, a part of the molecular chain may be branched.

【0009】本組成物中の(B)成分の含有量は、上記
(A)成分と本成分の合計量中で本成分が10〜90重量
%となる量である。これは、上記(A)成分と本成分の合
計量中で本成分の含有量が上記範囲の下限未満である
と、得られるシリコーン硬化物の物理的特性、特に、伸
びが低下する傾向があるからであり、一方、上記範囲の
上限をこえると、得られるシリコーン硬化物の物理的特
性、特に、強度が低下する傾向があるからである。
The content of the component (B) in the composition is as described above.
The amount of the present component is 10 to 90% by weight in the total amount of the component (A) and the present component. This is because if the content of the component is less than the lower limit of the above range in the total amount of the component (A) and the component, the physical properties of the obtained cured silicone material, particularly, the elongation tends to decrease. On the other hand, when the upper limit of the above range is exceeded, the physical properties of the obtained silicone cured product, particularly, the strength, tend to decrease.

【0010】(C)成分のオルガノポリシロキサンは、一
分子中に平均2個以上のケイ素原子結合水素原子を有
し、25℃における粘度が1〜100,000mPa・sであ
り、好ましくは、25℃における粘度が1〜5,000m
Pa・sである。(C)成分中のケイ素原子に結合する基とし
ては、上記R1で例示した一価炭化水素基が挙げられ、
特に、メチル基、フェニル基であることが好ましい。こ
のような(C)成分の分子構造としては、直鎖状、一部分
岐を有する直鎖状、分岐鎖状、環状、網状が例示され
る。
The organopolysiloxane of component (C) has an average of two or more silicon-bonded hydrogen atoms in one molecule, and has a viscosity at 25 ° C. of 1 to 100,000 mPa · s. The viscosity at ℃ is 1-5,000m
Pa · s. Examples of the group bonded to the silicon atom in the component (C) include the monovalent hydrocarbon groups exemplified for R 1 above,
Particularly, a methyl group or a phenyl group is preferable. Examples of the molecular structure of the component (C) include a straight chain, a partially branched straight chain, a branched chain, a ring, and a network.

【0011】本組成物中の(C)成分の含有量は、上記
(A)成分中のアルケニル基と上記(B)成分中のアルケニ
ル基の合計に対する本成分中のケイ素原子結合水素原子
のモル比が0.7〜1.5の範囲内となる量であり、好ま
しくは、0.8〜1.3の範囲内となる量である。これ
は、(C)成分の含有量が、上記範囲の下限未満となる量
である場合には、得られる硬化性シリコーン組成物が十
分に硬化しなくなる傾向があるからであり、一方、上記
範囲の上限をこえる量である場合には、得られるシリコ
ーン硬化物の耐熱性が低下する傾向があるからである。
The content of the component (C) in the composition is as described above.
The amount is such that the molar ratio of the silicon-bonded hydrogen atoms in this component to the total of the alkenyl groups in component (A) and the alkenyl groups in component (B) is in the range of 0.7 to 1.5, Preferably, the amount is in the range of 0.8 to 1.3. This is because, when the content of the component (C) is less than the lower limit of the above range, the curable silicone composition obtained tends to be not sufficiently cured. If the amount exceeds the upper limit, the heat resistance of the obtained cured silicone material tends to decrease.

【0012】(D)成分のヒドロシリル化反応用白金系触
媒は本組成物のヒドロシリル化反応による硬化を促進す
るための触媒であり、例えば、塩化白金酸、塩化白金酸
のアルコール溶液、白金のオレフィン錯体、白金のアル
ケニルシロキサン錯体、白金のカルボニル錯体が挙げら
れる。
The platinum catalyst for the hydrosilylation reaction of the component (D) is a catalyst for accelerating the curing of the composition by the hydrosilylation reaction. Examples thereof include chloroplatinic acid, an alcohol solution of chloroplatinic acid, and an olefin of platinum. Complexes, alkenylsiloxane complexes of platinum and carbonyl complexes of platinum.

【0013】本組成物中の(D)成分の含有量は、上記
(A)成分〜(C)成分の合計量に対して、本成分中の白金
金属が重量単位で0.01〜1,000ppmとなる量であ
り、好ましくは、これが0.1〜500ppmとなる量であ
る。これは、(D)成分の含有量が上記範囲の下限未満で
ある場合には、得られる硬化性シリコーン組成物が速や
かに硬化しなくなる傾向があるからであり、一方、上記
範囲の上限をこえても、得られる硬化性シリコーン組成
物の硬化性がさほど向上しなくなるからである。
The content of the component (D) in the composition is as described above.
The amount of platinum metal in this component is 0.01 to 1,000 ppm by weight, preferably 0.1 to 500 ppm, based on the total amount of components (A) to (C). Quantity. This is because when the content of the component (D) is less than the lower limit of the above range, the curable silicone composition to be obtained tends not to be quickly cured, while the amount exceeds the upper limit of the above range. This is because the curability of the curable silicone composition obtained does not improve so much.

【0014】(E)成分のアルミナ粉末は、得られるシリ
コーン硬化物のリペア性を向上させるための成分であ
る。この(E)成分の粒子径は限定されないが、その平均
粒子径が500μm以下であることが好ましく、さらに
は、100μm以下であることが好ましく、特には、5
0μm以下であることが好ましい。また、この(E)成分
の形状は限定されず、球状、偏平形状、不定形状が例示
される。
The alumina powder of the component (E) is a component for improving the repairability of the obtained cured silicone product. The particle diameter of the component (E) is not limited, but the average particle diameter is preferably 500 μm or less, more preferably 100 μm or less, and particularly preferably 5 μm or less.
It is preferably 0 μm or less. The shape of the component (E) is not limited, and examples include a spherical shape, a flat shape, and an irregular shape.

【0015】本組成物中の(E)成分の含有量は、上記
(A)成分と上記(B)成分の合計量100重量部に対し
て、本成分が200〜1,500重量部となる量であ
る。これは、(E)成分の含有量が上記範囲の下限未満で
あると、得られるシリコーン硬化物の強度が低下して、
リペア性が低下する傾向があるからであり、一方、上記
範囲の上限をこえると、本成分を硬化性シリコーン組成
物中に均一に分散させることができなったり、得られる
硬化性シリコーン組成物の流動性が低下する傾向がある
からである。
The content of the component (E) in the composition is as described above.
This component is used in an amount of 200 to 1,500 parts by weight based on 100 parts by weight of the total of the component (A) and the component (B). This is because if the content of the component (E) is less than the lower limit of the above range, the strength of the obtained cured silicone product is reduced,
On the other hand, if the upper limit of the above range is exceeded, the component cannot be uniformly dispersed in the curable silicone composition, or the resulting curable silicone composition has This is because the fluidity tends to decrease.

【0016】本発明の硬化性シリコーン組成物は、上記
(A)成分〜(E)成分を混合することにより調製される
が、その他任意の成分として、例えば、アセチレン系化
合物、ヒドラジン系化合物、フォスフィン系化合物、メ
ルカプタン系化合物等の反応抑制剤;その他、顔料、染
料、蛍光染料、耐熱向上剤、難燃性付与剤、可塑剤、接
着付与剤を配合することができる。
[0016] The curable silicone composition of the present invention comprises
It is prepared by mixing the components (A) to (E), and as other optional components, for example, a reaction inhibitor such as an acetylene-based compound, a hydrazine-based compound, a phosphine-based compound, a mercaptan-based compound; Pigments, dyes, fluorescent dyes, heat resistance improvers, flame retardants, plasticizers, and adhesion promoters can be added.

【0017】このような本発明の硬化性シリコーン組成
物は、ヒドロシリル化反応により硬化して、JIS K
6253に規定のタイプAデュロメータによる硬さが
30以下、好ましくは、20以下であるような比較的低
硬度のシリコーンゴム、あるいはシリコーンゲル等のエ
ラストマー状のシリコーン硬化物を形成でき、リペア性
が優れるので、電気・電子部品の封止・充填剤、あるい
は電気回路基板のコーティング剤等に使用することがで
きる。
Such a curable silicone composition of the present invention is cured by a hydrosilylation reaction to obtain JIS K
A relatively low-hardness silicone rubber having a hardness of 30 or less, preferably 20 or less according to a type A durometer specified in 6253, or an elastomeric silicone cured product such as silicone gel can be formed, and the repairability is excellent. Therefore, it can be used as a sealant / filler for electric / electronic parts or a coating agent for electric circuit boards.

【0018】[0018]

【実施例】本発明の硬化性シリコーン組成物を実施例に
より詳細に説明する。なお、実施例中の物理的特性は2
5℃における値である。
EXAMPLES The curable silicone composition of the present invention will be described in more detail with reference to examples. The physical characteristics in the examples are 2
The value at 5 ° C.

【0019】下記の成分を表1に示した組成で混合し
て、4種のシリコーンゴム組成物を調製した。表1中の
SiH/Viは、シリコーンゴム組成物中、上記(A)成分と
(B)成分に相当する成分中のビニル基のモル数の合計に
対する、上記(C)成分に相当する成分中のケイ素原子結
合水素原子のモル数の比を示した。これらのシリコーン
ゴム組成物を熱プレスにより120℃で30分間加熱す
ることにより、厚さ2mmのシリコーンゴムシートを作成
した。このシリコーンゴムの硬さをJIS K6253
に規定のタイプAデュロメータにより測定し、また、ダ
ンベル状3号形に成形したシリコーンゴムシートの引張
り強度、および伸びをJIS K 6249に規定の方
法に準じて測定した。また、同様に硬化させてなるシリ
コーンゴムシートを100℃で1000時間加熱するこ
とにより耐久試験を行ない、同様の試験を行なった。一
方、シリコーンゴムのリペア性は、アルミ板上でシリコ
ーンゴム組成物を120℃で30分間加熱することによ
り硬化させたシリコーンゴム(厚さ2mm、幅10mm)を、
剥離速度300mm/分で180°ピール試験することに
より測定した。また、同様にアルミ板上でシリコーンゴ
ム組成物を硬化させてなる試験体を100℃で1000
時間加熱することにより耐久試験を行ない、同様のピー
ル試験を行なった。これらの結果を表1に記載した。
The following components were mixed with the compositions shown in Table 1 to prepare four types of silicone rubber compositions. In Table 1
SiH / Vi is the same as the above component (A) in the silicone rubber composition.
The ratio of the number of moles of silicon-bonded hydrogen atoms in the component corresponding to component (C) to the total number of moles of vinyl groups in the component corresponding to component (B) is shown. These silicone rubber compositions were heated by a hot press at 120 ° C. for 30 minutes to produce a silicone rubber sheet having a thickness of 2 mm. The hardness of this silicone rubber is determined according to JIS K6253.
And a tensile strength and an elongation of a silicone rubber sheet formed into a dumbbell-shaped No. 3 shape were measured according to a method specified in JIS K6249. A durability test was performed by heating the similarly cured silicone rubber sheet at 100 ° C. for 1000 hours, and a similar test was performed. On the other hand, the repairability of the silicone rubber is such that the silicone rubber composition (thickness 2 mm, width 10 mm) cured by heating the silicone rubber composition on an aluminum plate at 120 ° C. for 30 minutes,
It was measured by performing a 180 ° peel test at a peeling speed of 300 mm / min. Similarly, a test specimen obtained by curing the silicone rubber composition on an aluminum plate was subjected to a 1000
An endurance test was performed by heating for an hour, and a similar peel test was performed. Table 1 shows the results.

【0020】成分a−1:93.85モル%の(CH3)2
SiO2/2単位、2.51モル%の(CH3)3SiO1/2
位、3.01モル%のCH3SiO3/2単位、および0.6
3モル%の(CH3)2(CH2=CH)SiO1/2単位からな
るオルガノポリシロキサン(ビニル基の含有量=0.23
重量%) 成分a−2:93.89モル%の(CH3)2SiO2/2
位、1.00モル%の(CH3)3SiO1/2単位、3.01
モル%のCH3SiO3/2単位、および2.10モル%の
(CH3)2(CH2=CH)SiO1/2単位からなるオルガノ
ポリシロキサン(ビニル基の含有量=0.76重量%) 成分b:粘度900mPa・s、ビニル基含有量=0.23重
量%である分子鎖両末端ジメチルビニルシロキシ基封鎖
ジメチルポリシロキサン 成分c−1:粘度5mPa・s、ケイ素原子結合水素原子の
含有量=0.12重量%である分子鎖両末端ジメチルハ
イドロジェンシロキシ基封鎖ジメチルポリシロキサン 成分c−2:粘度20mPa・s、ケイ素原子結合水素原子
の含有量=0.76重量%である分子鎖両末端トリメチ
ルシロキシ基封鎖ジメチルシロキサン・メチルハイドロ
ジェンシロキサン共重合体 成分d:白金の1,3−ジビニルテトラメチルジシロキ
サン錯体の1,3−ジビニルテトラメチルジシロキサン
溶液{なお、表1において、成分dの含有量は、シリコ
ーンゴム組成物中の(A)〜(C)成分に相当する成分の合
計重量に対する白金金属の重量(ppm)により示した。} 成分e:平均粒子径が1.2μmのアルミナ粉末
Component a-1: 93.85 mol% of (CH 3 ) 2
SiO 2/2 units, 2.51 mol% of (CH 3 ) 3 SiO 1/2 units, 3.01 mol% of CH 3 SiO 3/2 units, and 0.6
Organopolysiloxane consisting of 3 mol% of (CH 3 ) 2 (CH 2 CHCH) SiO 1/2 units (vinyl group content = 0.23
Component a-2: 93.89 mol% of (CH 3 ) 2 SiO 2/2 units, 1.00 mol% of (CH 3 ) 3 SiO 1/2 units, 3.01
Mole% CH 3 SiO 3/2 units, and 2.10 mole%
Organopolysiloxane composed of (CH 3 ) 2 (CH 2 CHCH) SiO 1/2 units (vinyl group content = 0.76% by weight) Component b: viscosity 900 mPa · s, vinyl group content = 0.23 Dimethylpolysiloxane blocked with dimethylvinylsiloxy groups at both ends of the molecular chain which is weight% Component c-1: dimethylhydrogensiloxy at both ends of the molecular chain having a viscosity of 5 mPa · s and a content of silicon-bonded hydrogen atoms = 0.12% by weight Group c-blocked dimethyl polysiloxane Component c-2: a dimethyl siloxane-methyl hydrogen siloxane copolymer having a trimethylsiloxy group-capped at both ends of the molecular chain having a viscosity of 20 mPa · s and a content of silicon-bonded hydrogen atoms of 0.76% by weight. d: 1,3-divinyltetramethyldisiloxane solution of 1,3-divinyltetramethyldisiloxane complex of platinum {in Table 1, the components The content of d was represented by the weight (ppm) of platinum metal with respect to the total weight of components corresponding to components (A) to (C) in the silicone rubber composition. } Component e: Alumina powder having an average particle size of 1.2 μm

【0021】[0021]

【表1】 [Table 1]

【0022】[0022]

【発明の効果】本発明の硬化性シリコーン組成物はヒド
ロシリル化反応により硬化して、リペア性が優れるシリ
コーン硬化物を形成するという特徴がある。
The curable silicone composition of the present invention is characterized by being cured by a hydrosilylation reaction to form a cured silicone product having excellent repairability.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (A)80〜96.5モル%のR1 2SiO
2/2単位、1.0〜10.0モル%のR1SiO3/2単位、
0〜6.0モル%のR1 3SiO1/2単位、および0.25
〜4.0モル%のR1 22SiO1/2単位からなるオルガ
ノポリシロキサン{式中、R1は脂肪族不飽和結合を有
しない一価炭化水素基であり、R2はアルケニル基であ
る。}、(B)25℃における粘度が1〜100,000m
Pa・sであり、一分子中に平均2個以上のアルケニル基を
有するジオルガノポリシロキサン{上記(A)成分と本成
分の合計量中で10〜90重量%となる量}、(C)25
℃における粘度が1〜100,000mPa・sであり、一分
子中に平均2個以上のケイ素原子結合水素原子を有する
オルガノポリシロキサン{上記(A)成分中のアルケニル
基と(B)成分中のアルケニル基の合計に対する本成分中
のケイ素原子結合水素原子のモル比が0.7〜1.5とな
る量}、(D)ヒドロシリル化反応用白金系触媒{上記
(A)成分〜(C)成分の合計量に対して、本成分中の白金
金属が重量単位で0.01〜1,000ppmとなる量}、
および(E)アルミナ粉末{上記(A)成分と(B)成分の合
計量100重量部に対して、200〜1,500重量部
となる量}からなる硬化性シリコーン組成物。
1. A (A) 80 to 96.5 mol% of R 1 2 SiO
2/2 units, 1.0 to 10.0 mol% of R 1 SiO 3/2 units,
0 to 6.0 mol% of R 1 3 SiO 1/2 units, and 0.25
Organopolysiloxane {wherein consisting to 4.0 mol% of R 1 2 R 2 SiO 1/2 units, R 1 is monovalent hydrocarbon group with no aliphatic unsaturated bonds, R 2 is an alkenyl group It is. }, (B) viscosity at 25 ° C. is 1 to 100,000 m
Pa.s, a diorganopolysiloxane having an average of two or more alkenyl groups in one molecule {an amount of 10 to 90% by weight in the total amount of the above component (A) and this component}, (C) 25
Organopolysiloxane having a viscosity at 1 ° C. of 1 to 100,000 mPa · s and having an average of two or more silicon-bonded hydrogen atoms in one molecule. The alkenyl group in the component (A) and the component (B) An amount in which the molar ratio of silicon-bonded hydrogen atoms in this component to the total alkenyl groups is 0.7 to 1.5 {(D) a platinum-based catalyst for hydrosilylation reaction}
(A) The amount of platinum metal in this component is 0.01 to 1,000 ppm by weight based on the total amount of components (C) to (C),
And (E) an alumina powder {an amount of 200 to 1,500 parts by weight based on 100 parts by weight of the total of the components (A) and (B)}.
JP2000022621A 1999-03-12 2000-01-31 Curable silicone composition Pending JP2000327921A (en)

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JP2004296555A (en) * 2003-03-25 2004-10-21 Dow Corning Toray Silicone Co Ltd Semiconductor device and method for manufacturing the same
JP2007131694A (en) * 2005-11-09 2007-05-31 Dow Corning Toray Co Ltd Curable silicone composition
US8344268B2 (en) 2008-07-02 2013-01-01 Panasonic Corporation Electronic component packaging structure having two-layer moisture-proof coating and method for manufacturing the same
CN103102689A (en) * 2011-11-15 2013-05-15 佛山市金戈消防材料有限公司 Organic-silicon pouring sealant composition with high thermal conductivity and application thereof

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JPS5980464A (en) * 1982-09-02 1984-05-09 ゼネラル・エレクトリツク・カンパニイ Improved solvent-resistant vulcanizable silicone rubber composition
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US8344268B2 (en) 2008-07-02 2013-01-01 Panasonic Corporation Electronic component packaging structure having two-layer moisture-proof coating and method for manufacturing the same
CN103102689A (en) * 2011-11-15 2013-05-15 佛山市金戈消防材料有限公司 Organic-silicon pouring sealant composition with high thermal conductivity and application thereof
CN103102689B (en) * 2011-11-15 2015-04-01 佛山市金戈消防材料有限公司 Organic-silicon pouring sealant composition with high thermal conductivity and application thereof

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