JP2631098B2 - Silicone pressure sensitive adhesive composition - Google Patents
Silicone pressure sensitive adhesive compositionInfo
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- JP2631098B2 JP2631098B2 JP7288089A JP28808995A JP2631098B2 JP 2631098 B2 JP2631098 B2 JP 2631098B2 JP 7288089 A JP7288089 A JP 7288089A JP 28808995 A JP28808995 A JP 28808995A JP 2631098 B2 JP2631098 B2 JP 2631098B2
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- sensitive adhesive
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、硬化して感圧接着剤と
なり得る付加反応型シリコーン感圧接着剤組成物に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an addition-reaction silicone pressure-sensitive adhesive composition which can be cured to form a pressure-sensitive adhesive.
【０００２】[0002]
【従来の技術】シリコーン感圧接着剤は、感圧接着剤と
して必要とされる接着力、粘着性、タック、凝集力等の
特性に優れており、加えて、シリコーン特有の耐熱性、
耐寒性、電気特性等の特性を有しているので、高度の信
頼性が要求される電気絶縁用テープや耐熱性、耐寒性が
要求される各種粘着製品に幅広く使用されている。一般
に、シリコーン感圧接着剤組成物としては、ジメチルシ
ロキサン重合体およびメチルシロキサン樹脂の混合物か
ら成り有機過酸化物によって硬化する組成物が使用され
ている。また、これとは別にアルケニル基含有オルガノ
ポリシロキサンとケイ素原子結合水素原子含有オルガノ
ポリシロキサンとの付加反応によって硬化する組成物が
提案されている（特公昭５４−３７９０７号参照）。2. Description of the Related Art Silicone pressure-sensitive adhesives have excellent properties such as adhesive strength, tackiness, tack, and cohesive strength required as pressure-sensitive adhesives.
Because of its properties such as cold resistance and electrical properties, it is widely used in electrical insulating tapes requiring high reliability and various adhesive products requiring heat resistance and cold resistance. Generally, as the silicone pressure-sensitive adhesive composition, a composition composed of a mixture of a dimethylsiloxane polymer and a methylsiloxane resin and cured by an organic peroxide is used. In addition, a composition which is cured by an addition reaction between an alkenyl group-containing organopolysiloxane and a silicon-bonded hydrogen atom-containing organopolysiloxane has been proposed (see Japanese Patent Publication No. 54-37907).
【０００３】[0003]
【発明が解決しようとする問題点】ところが、前者の組
成物はこれを感圧接着剤とするためには１３０℃以上の
高温度条件下で加熱し硬化させる必要があり、熱に弱い
基材類へ適用することができなかった。また、後者の組
成物は、前者の組成物に比べてより低温で硬化させるこ
とが可能であるが、前者の組成物に比べて接着力が劣る
という欠点があった。本発明者らはかかる従来技術の問
題点を解消すべく検討した結果、本発明を完成させるに
至った。本発明の目的は、比較的低温度条件下で硬化が
可能であり、タック、凝集力に優れ、特に高い接着力を
有する感圧接着剤となり得る感圧接着剤組成物を提供す
るにある。However, in order to use the former composition as a pressure-sensitive adhesive, it is necessary to heat and cure it under a high temperature condition of 130 ° C. or more. Could not be applied to a class. Further, the latter composition can be cured at a lower temperature than the former composition, but has a drawback that the adhesive strength is inferior to the former composition. The present inventors have studied to solve the problems of the related art, and as a result, completed the present invention. An object of the present invention is to provide a pressure-sensitive adhesive composition that can be cured under relatively low temperature conditions, has excellent tack and cohesive strength, and can be a pressure-sensitive adhesive having particularly high adhesive strength.
【０００４】[0004]
【問題点の解決手段とその作用】上記目的は、 (Ａ)一般式[Means for solving the problem and its operation]
【化２】 ［式中、Ｒは一価炭化水素基、Ｒ1は低級アルケニル基であり、重合度を示すｎ は(Ａ)成分の２５℃における粘度が５０万センチポイス以上となるような整数で ある。］で示され、２５℃における粘度が５０万センチポイズ以上であるジオル ガノポリシロキサン ３０〜７０重量部、 (Ｂ)Ｒ2 3ＳｉＯ1/2単位（式中、Ｒ2はアルキル基、アルケニル基および水酸基か ら選択され、全Ｒ2基の少なくとも９５モル％はメチル基である。）とＳｉＯ2単 位から成り、そのモル比が（０.６：１）〜（０.９：１）の範囲内にあり、ケイ 素原子結合水酸基含有量が０〜１重量％（ただし、０を含まない）の範囲内にあ るオルガノポリシロキサン ７０〜３０重量部、 (Ｃ)１分子中に少なくとも２個のケイ素原子結合水素原子を有するオルガノハイ ドロジェンポリシロキサン (Ａ)成分中のアルケニル基１個あたり、１〜４０個の ケイ素原子結合水素原子を与えるに充分な量 (Ｄ)白金系触媒 (Ａ)〜(Ｃ)成分の合計量１００万重量部に対して 白金金属として０.１〜１,０００重量部 および (Ｅ)有機溶剤 任意量 から成るシリコーン感圧接着剤組成物によって達成され
る。Embedded image [In the formula, R is a monovalent hydrocarbon group, R 1 is a lower alkenyl group, and n indicating the degree of polymerization is an integer such that the viscosity of the component (A) at 25 ° C. becomes 500,000 centipoise or more. Indicated by, Jioru Ganoderma polysiloxane 30-70 parts by weight viscosity at 25 ° C. is 500,000 centipoise or higher, (B) R 2 3 SiO 1/2 units (wherein, R 2 is an alkyl group, an alkenyl group and Selected from hydroxyl groups, at least 95 mol% of all R 2 groups are methyl groups) and SiO 2 units, and the molar ratio thereof is (0.6: 1) to (0.9: 1). 70 to 30 parts by weight of an organopolysiloxane having a silicon atom-bonded hydroxyl group content in the range of 0 to 1 % by weight (but not including 0) , and (C) at least 2 parts per molecule. (D) an amount sufficient to provide 1 to 40 silicon-bonded hydrogen atoms per alkenyl group in the component (A). Total amount of components A) to (C) 100 Is achieved by 0.1 to 1,000 parts by weight (E) a silicone pressure sensitive adhesive composition comprising an organic solvent optionally the amount of platinum metal based on parts by weight.
【０００５】これを説明すると、(Ａ)成分は本発明の感
圧接着剤組成物の主成分であり、(Ｄ)成分の触媒作用に
より(Ｃ)成分と付加反応して硬化する。このような(Ａ)
成分は分子鎖末端に付加反応に必要なアルケニル基を有
することが必要である。上式中、Ｒはメチル基，エチル
基，プロピル基等のアルキル基；ビニル基，アリル基，
プロペニル基等のアルケニル基；フェニル基等の一価炭
化水素基であり、一般にはメチル基が好ましい。特に耐
熱性が必要な場合にはフェニル基をメチル基に共存させ
てもよい。Ｒ1はビニル基、アリル基、プロペニル基等
のアルケニル基、好ましくは低級アルケニル基である。
(Ａ)成分の粘度は２５℃において５０万センチポイズ以
上であり、１００万センチポイズ以上であることが好ま
しく、(Ａ)成分は、通常、シリコーン生ゴムと呼ばれる
形態を有するものが好ましく使用される。[0005] Explaining this, component (A) is the main component of the pressure-sensitive adhesive composition of the present invention, and is cured by addition reaction with component (C) by the catalytic action of component (D). (A)
The component must have an alkenyl group required for the addition reaction at the end of the molecular chain. In the above formula, R is an alkyl group such as a methyl group, an ethyl group, or a propyl group; a vinyl group, an allyl group,
An alkenyl group such as a propenyl group; a monovalent hydrocarbon group such as a phenyl group; generally, a methyl group is preferred. In particular, when heat resistance is required, a phenyl group may coexist with a methyl group. R 1 is an alkenyl group such as a vinyl group, an allyl group or a propenyl group, preferably a lower alkenyl group.
The viscosity of the component (A) is at least 500,000 centipoise at 25 ° C., and preferably at least 1,000,000 centipoise, and the component (A) usually has a form called silicone raw rubber.
【０００６】(Ｂ)成分は硬化後の感圧接着剤に接着力を
付与するオルガノポリシロキサンレジンであり、上式
中、Ｒ2はメチル基、エチル基、プロピル基等のアルキ
ル基；ビニル基、アリル基等のアルケニル基および水酸
基から選択され、全Ｒ2基の少なくとも９５モル％はメ
チル基である。尚、本発明においては全Ｒ2基のうちア
ルケニル基の含有量は０.５モル％以下であり、好まし
くは０モル％である。そして、Ｒ2 3ＳｉＯ1/2単位とＳ
ｉＯ2単位のモル比が、（０.６：１）〜（０.９：１）
の範囲にあることが必要である。これはＲ2 3ＳｉＯ1/2
単位が０.６未満になると接着力が低下し、０.９を越え
ると凝集力が低下するからである。このようなオルガノ
ポリシロキサンの合成方法は公知である。(Ｂ)成分中の
ケイ素原子に結合した水酸基の含有量は、(Ｂ)成分の全
重量に対して０〜１重量％の範囲内にあることが必要で
あり、好ましくは０〜０.６重量％の範囲内である。こ
れは、ケイ素原子に結合した水酸基の含有量が１重量％
を越えると、高い接着力が得られないからである。本発
明においては特にこの水酸基の含有量が重要である。The component (B) is an organopolysiloxane resin that imparts adhesive strength to the cured pressure-sensitive adhesive, wherein R 2 is an alkyl group such as a methyl group, an ethyl group, or a propyl group; , An alkenyl group such as an allyl group and a hydroxyl group, and at least 95 mol% of all R 2 groups are methyl groups. In the present invention, the content of the alkenyl group in all R 2 groups is 0.5 mol% or less, preferably 0 mol%. And, R 2 3 SiO 1/2 units and S
The molar ratio of iO 2 units is (0.6: 1) to (0.9: 1)
Must be in the range of This is R 2 3 SiO 1/2
This is because if the unit is less than 0.6, the adhesive strength is reduced, and if it exceeds 0.9, the cohesive strength is reduced. Methods for synthesizing such organopolysiloxanes are known. The content of the hydroxyl group bonded to the silicon atom in the component (B) must be within the range of 0 to 1% by weight, preferably 0 to 0.6%, based on the total weight of the component (B). % By weight. This means that the content of hydroxyl groups bonded to silicon atoms is 1% by weight.
This is because high adhesive strength cannot be obtained if the ratio exceeds. In the present invention, the content of the hydroxyl group is particularly important.
【０００７】(Ｃ)成分は(Ａ)成分の架橋剤として働くオ
ルガノポリシロキサンであり、(Ｄ)成分の触媒作用によ
り本成分中のケイ素原子結合水素原子が(Ａ)成分中のア
ルケニル基と付加反応して硬化するものである。このよ
うな(Ｃ)成分は(Ａ)成分中のアルケニル基１個あたり、
１〜４０個のケイ素原子結合水素原子を与えるに充分な
量であればよい。これは１個未満でも４０個より多くて
も充分な凝集力が得られないからである。(Ｃ)成分の分
子構造は、鎖状、網状、環状等どのような形態のもので
も差し支えない。The component (C) is an organopolysiloxane which functions as a crosslinking agent for the component (A), and the silicon-bonded hydrogen atom in the component is replaced with the alkenyl group in the component (A) by the catalytic action of the component (D). It is cured by an addition reaction. Such a component (C) is contained per alkenyl group in the component (A),
Any amount is sufficient to provide 1 to 40 silicon-bonded hydrogen atoms. This is because a sufficient cohesive force cannot be obtained if the number is less than 1 or more than 40. The molecular structure of the component (C) may be in any form such as a chain, a network, and a ring.
【０００８】(Ｄ)成分は、(Ａ)成分と(Ｃ)成分との付加
反応を促進する白金系触媒である。これらの具体例とし
ては、塩化白金酸、塩化白金酸とオレフィンとの錯体、
塩化白金酸とビニルシロキサンとの錯体、あるいはアル
ミナのような微細粉状担体上に白金を担持させたものな
どが挙げられる。(Ｄ)成分の添加量は、(Ａ)成分〜(Ｃ)
成分の合計量１００万重量部に対して白金金属として
０.１〜１,０００重量部であり、好ましくは１〜３００
重量部である。これは、０.１重量部未満では架橋反応
が不十分となり、凝集力が低下する傾向にあり、１,０
００重量部を越えると可使時間が短くなり、またコスト
が高くなり不利であるからである。[0008] The component (D) is a platinum-based catalyst that promotes the addition reaction between the components (A) and (C). Specific examples of these include chloroplatinic acid, complexes of chloroplatinic acid and olefins,
Examples thereof include a complex of chloroplatinic acid and vinyl siloxane, or a material in which platinum is supported on a fine powdery carrier such as alumina. The added amount of the component (D) ranges from the components (A) to (C).
The total amount of the components is 0.1 to 1,000 parts by weight, preferably 1 to 300 parts by weight, as platinum metal with respect to 1 million parts by weight.
Parts by weight. If the amount is less than 0.1 part by weight, the crosslinking reaction becomes insufficient, and the cohesive strength tends to decrease.
If the amount exceeds 00 parts by weight, the pot life becomes short, and the cost increases, which is disadvantageous.
【０００９】(Ｅ)成分は、(Ａ)〜(Ｄ)成分を溶解し本発
明の感圧接着剤組成物を各種基材上に塗布し易くする作
用をする。これらの具体例としては、トルエン、キシレ
ン、ミネラルスピリット等が挙げられるが、(Ａ)〜(Ｄ)
成分を溶解し、かつ上記付加反応を阻害しない有機溶剤
であればよく、その種類等は特に限定されない。これら
の有機溶剤の量は任意量であり、通常は、２５〜４００
重量部で使用される。The component (E) functions to dissolve the components (A) to (D) and facilitate application of the pressure-sensitive adhesive composition of the present invention onto various substrates. Specific examples of these include toluene, xylene, mineral spirit and the like, but (A) to (D)
Any organic solvent may be used as long as it dissolves the components and does not inhibit the above addition reaction, and the type and the like are not particularly limited. The amount of these organic solvents is arbitrary, and is usually 25 to 400.
Used in parts by weight.
【００１０】本発明においては、(Ａ)〜(Ｅ)成分の他に
従来公知の付加反応抑制剤を添加配合することは何ら差
し支えない。これらの具体例としては、３−メチル−１
−ブチン−３−オール、３.５ジメチル−１−ヘキシン
−３−オール、３−メチル−１−ペンテン−３−オー
ル、フェニルブチノールなどのアセチレンアルコールや
３−メチル−３−ペンテン−１−イン、３.５−ジメチ
ル−３−ヘキセン−１−インなどが挙げられる。さら
に、本発明の組成物に少量の追加成分を加えることも可
能である。そのような追加成分としては各種の酸化防止
剤、顔料、安定剤、及び充填剤が挙げられる。また本発
明の感圧接着剤組成物を用いて粘着製品を作る場合の基
材としては、ポリエステル、テフロン、ポリイミドなど
のプラスチックフィルム；和紙、合成紙などの紙；布、
グラスウール、金属箔など種々の材質のものが、使用可
能である。In the present invention, in addition to the components (A) to (E), a conventionally known addition reaction inhibitor may be added and mixed at all. Specific examples of these include 3-methyl-1
Acetylene alcohols such as butyn-3-ol, 3.5 dimethyl-1-hexyn-3-ol, 3-methyl-1-penten-3-ol and phenylbutynol, and 3-methyl-3-penten-1- And 3.5-dimethyl-3-hexen-1-yne. In addition, small amounts of additional components can be added to the compositions of the present invention. Such additional components include various antioxidants, pigments, stabilizers, and fillers. In addition, when a pressure-sensitive adhesive composition of the present invention is used to produce a pressure-sensitive adhesive product, the base material may be a plastic film such as polyester, Teflon, or polyimide; a paper such as Japanese paper or synthetic paper; a cloth;
Various materials such as glass wool and metal foil can be used.
【００１１】[0011]
【実施例】次に、本発明を実施例にて説明する。実施例
中、部は重量部を示し、％は重量％を示し、粘度は２５
℃における値である。また、実施例中に示した各特性は
次の方法により測定した。 ○接着力の測定方法 基材にシリコーン感圧接着剤組成物を所定厚さに塗工後
加熱硬化して得られた粘着テープを、２８０番耐水研磨
紙で表面を磨いたステンレス板（ＳＵＳ３０４）に２kg
重のゴムローラーを用いて貼り合わせた。室温下１時間
静置後、引張り試験器［テンシロン：東洋ボールドウィ
ン（株）製］を用い０.３ｍ／minの早さで剥した時の接
着力を測定し、ｇ／２.５cmの単位で表示した。 ○凝集力の測定方法 上記接着力の測定方法と同じ方法で作られた粘着テープ
を、２８０番耐水研磨紙で表面を磨いたステンレス板
（ＳＵＳ３０４）上に、長さ２０mm、幅１０mmの面積部
分で２kg重のゴムローラーを用いて貼り合わせた。この
粘着テープの下端に５００ｇの荷重をかけ、１００℃の
オーブン中に２時間つるした後のずれ距離を、読取り顕
微鏡で測定し、mm単位で表示した。 ○ボールタックの測定方法 接着力測定の際と同じ方法で作られた粘着テープを粘着
面を上にして、傾斜角３０度のボールタックテスター
［テスター産業（株）製］の上に貼り付ける。１０cm長
の助走路をもたせて、種々の大きさの鋼球をころがし、
１０cm長の粘着面で停止した最大の鋼球の直径を１／３
２インチ単位で示した。例えば、表示１０は、直径１０
／３２インチの鋼球がこの粘着面上で止まり得た最大の
鋼球であったことを示す。測定は室温で行った。Next, the present invention will be described with reference to examples. In the examples, “part” indicates “part by weight”, “%” indicates “% by weight”, and the viscosity is 25%.
It is a value at ° C. Each characteristic shown in the examples was measured by the following method. ○ Measurement method of adhesive strength A pressure-sensitive adhesive tape obtained by applying a silicone pressure-sensitive adhesive composition to a base material to a predetermined thickness and then heating and curing the same is used. 2kg
Lamination was performed using a heavy rubber roller. After standing at room temperature for 1 hour, the adhesive strength when peeled at a speed of 0.3 m / min using a tensile tester [Tensilon: manufactured by Toyo Baldwin Co., Ltd.] was measured, and the unit was g / 2.5 cm. displayed. ○ Measurement method of cohesion force An adhesive tape made by the same method as the adhesion force measurement method above was placed on a stainless plate (SUS304) whose surface was polished with No. 280 water-resistant abrasive paper, and an area of 20 mm in length and 10 mm in width was used. And bonded using a 2 kg weight rubber roller. A load of 500 g was applied to the lower end of the pressure-sensitive adhesive tape, and the resulting tape was suspended in an oven at 100 ° C. for 2 hours. The displacement distance was measured with a reading microscope and indicated in mm. O Measurement method of ball tack A pressure-sensitive adhesive tape made in the same manner as in the measurement of the adhesive strength is stuck on a ball tack tester (manufactured by Tester Sangyo Co., Ltd.) with a 30-degree inclination angle, with the adhesive face up. Rolling steel balls of various sizes with a 10cm long runway,
1/3 the diameter of the largest steel ball stopped on a 10 cm long adhesive surface
Indicated in units of 2 inches. For example, the display 10 has a diameter of 10
This indicates that the / 32 inch steel ball was the largest steel ball that could stop on this sticky surface. The measurement was performed at room temperature.
【００１２】[0012]
【実施例１】（ＣＨ3）3ＳｉＯ1/2単位とＳｉＯ2単位か
らなり、そのモル比が０.７：１.０であり、水酸基含有
量が０.５％のメチルポリシロキサンレジン５５部、生
ゴム状の両末端ジメチルビニルシロキシ基封鎖ジメチル
ポリシロキサンレジン（ビニル基含有量０.０２％）４
５部、粘度２０センチポイズの両末端トリメチルシロキ
シ基封鎖のメチルハイドロジェンポリシロキサン（ケイ
素原子結合水素原子含有量１.６％）０.２部を混合し
た。この混合物においてケイ素原子結合水素原子とビニ
ル基のモル比は９.６であった。次いで、この混合物に
反応抑制剤として３−メチル−１−ブチン−３−オール
０.２部を１５０部のトルエンに溶解した。次いで、こ
れに塩化白金酸とテトラビニルテトラメチルシロキサン
の錯体を上記ポリシロキサンの合計量に対して白金金属
として１００ppmとなるような量を加えて混合し、不揮
発分４０％の感圧接着剤組成物を得た。この組成物を加
熱後の膜厚が５０ミクロンになるように厚さ５０ミクロ
ンのアルミ箔に塗工し、８０℃で５分間加熱した。得ら
れたアルミ箔基材の粘着テープについて、その皮膜形成
性、接着力、ボールタック、凝集力を測定して表１の結
果を得た。比較のために、上記水酸基含有量が０.５％
であるメチルポリシロキサンレジンの代りに、水酸基含
有量が２.０％のメチルポリシロキサンレジンを用いて
感圧接着剤組成物を得た。この組成物について上記と同
一の方法によって評価した結果を比較例１として表１に
併記した。表１から本発明の感圧接着剤組成物は、比較
例１のそれと比べて接着力にすぐれていることが分っ
た。EXAMPLE 1 A methylpolysiloxane resin 55 consisting of (CH 3 ) 3 SiO 1/2 units and SiO 2 units, having a molar ratio of 0.7: 1.0 and a hydroxyl group content of 0.5%. Part, raw rubber-like dimethylvinylsiloxy group-blocked dimethylpolysiloxane resin (vinyl group content: 0.02%) 4
5 parts and 0.2 part of methylhydrogenpolysiloxane (silicon-bonded hydrogen atom content: 1.6%) having a viscosity of 20 centipoise and capped at both ends with a trimethylsiloxy group were mixed. In this mixture, the molar ratio of silicon-bonded hydrogen atoms to vinyl groups was 9.6. Next, 0.2 part of 3-methyl-1-butyn-3-ol as a reaction inhibitor was dissolved in 150 parts of toluene in this mixture. Next, a complex of chloroplatinic acid and tetravinyltetramethylsiloxane was added thereto in an amount of 100 ppm as platinum metal with respect to the total amount of the above-mentioned polysiloxane, and the mixture was mixed. I got something. This composition was coated on an aluminum foil having a thickness of 50 μm so that the film thickness after heating became 50 μm, and heated at 80 ° C. for 5 minutes. The film forming property, adhesive strength, ball tack and cohesive strength of the obtained adhesive tape of the aluminum foil substrate were measured, and the results shown in Table 1 were obtained. For comparison, the above hydroxyl group content was 0.5%
A pressure-sensitive adhesive composition was obtained by using a methylpolysiloxane resin having a hydroxyl group content of 2.0% instead of the methylpolysiloxane resin. The results of evaluation of this composition by the same method as described above are also shown in Table 1 as Comparative Example 1. From Table 1, it was found that the pressure-sensitive adhesive composition of the present invention was superior in adhesive strength to that of Comparative Example 1.
【表１】 [Table 1]
【００１３】[0013]
【実施例２】実施例１において、メチルハイドロジェン
ポリシロキサンの配合量を０.４部とした以外は実施例
１と同様にして感圧接着剤組成物を得た。ここで、ケイ
素原子結合水素原子とビニル基のモル比は１９.２であ
った。次いで、この組成物の感圧接着剤としての特性を
測定した。結果は表２に示す通りであった。Example 2 A pressure-sensitive adhesive composition was obtained in the same manner as in Example 1, except that the blending amount of methyl hydrogen polysiloxane was changed to 0.4 part. Here, the molar ratio of the silicon-bonded hydrogen atom to the vinyl group was 19.2. Next, the properties of this composition as a pressure-sensitive adhesive were measured. The results were as shown in Table 2.
【表２】 [Table 2]
【００１４】[0014]
【実施例３】実施例１において、メチルハイドロジェン
ポリシロキサン０.２部の代りに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１.２部を使
用した以外は実施例１と同様にして感圧接着剤組成物を
得た。ここで、ケイ素原子結合水素原子とビニル基のモ
ル比は２８.８であった。次いで、この組成物の感圧接
着剤組成物としての特性を測定した。結果は表３に示す
通りであった。Example 3 In Example 1, dimethylsiloxane-polysiloxane was used in place of 0.2 part of methylhydrogenpolysiloxane.
A pressure-sensitive adhesive composition was obtained in the same manner as in Example 1, except that 1.2 parts of the methylhydrogensiloxane copolymer was used. Here, the molar ratio of the silicon-bonded hydrogen atom to the vinyl group was 28.8. Next, the properties of this composition as a pressure-sensitive adhesive composition were measured. The results were as shown in Table 3.
【表３】 [Table 3]
【００１５】[0015]
【発明の効果】本発明のシリコーン感圧接着剤組成物
は、(Ａ)分子鎖の両末端に低級アルケニル基を有する２
５℃の粘度が５０万センチポイス以上のジオルガノポリ
シロキサン、(Ｂ)Ｒ2 3ＳｉＯ1/2単位とＳｉＯ2単位から
成りケイ素原子結合水酸基含有量が０〜１重量％（ただ
し、０を含まない）の範囲内にあるオルガノポリシロキ
サン、(Ｃ)１分子中に少なくとも２個のケイ素原子結合
水素原子を有するオルガノハイドロジェンポリシロキサ
ン、(Ｄ)白金系触媒および(Ｅ)有機溶剤から成るので、
比較的低温度条件下で硬化が可能であり、タック、凝集
力に優れ、特に高い接着力を有する感圧接着剤となり得
るという特徴を有する。The silicone pressure-sensitive adhesive composition of the present invention comprises (A) a compound having a lower alkenyl group at both ends of the molecular chain.
5 viscosity ℃ is more than 500,000 centipoise diorganopolysiloxane, (B) R 2 3 silicon-bonded hydroxyl content consists SiO 1/2 units and SiO 2 units 0-1 wt% (only
And organopolysiloxane in the range of not including 0), (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule, (D) a platinum catalyst and (E) Because it consists of organic solvents,
It has the characteristics that it can be cured under relatively low temperature conditions, has excellent tack and cohesive strength, and can be a pressure-sensitive adhesive having particularly high adhesive strength.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０９Ｊ 183:04 183:05） (Ｃ０９Ｊ 183/07 183:06 183:05） ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical indication location C09J 183: 04 183: 05) (C09J 183/07 183: 06 183: 05)
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7288089A JP2631098B2 (en) | 1995-10-09 | 1995-10-09 | Silicone pressure sensitive adhesive composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7288089A JP2631098B2 (en) | 1995-10-09 | 1995-10-09 | Silicone pressure sensitive adhesive composition |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62292773A Division JPH0684494B2 (en) | 1986-11-28 | 1987-11-19 | Silicone pressure sensitive adhesive composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08209104A JPH08209104A (en) | 1996-08-13 |
| JP2631098B2 true JP2631098B2 (en) | 1997-07-16 |
Family
ID=17725653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7288089A Expired - Lifetime JP2631098B2 (en) | 1995-10-09 | 1995-10-09 | Silicone pressure sensitive adhesive composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2631098B2 (en) |
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| JPS5437907A (en) * | 1977-09-01 | 1979-03-20 | Awano Seiichi | Ejector apparatus |
| US4255316A (en) * | 1979-04-26 | 1981-03-10 | Dow Corning Corporation | Ceramifiable silicone adhesives |
| US4591622A (en) * | 1984-10-29 | 1986-05-27 | Dow Corning Corporation | Silicone pressure-sensitive adhesive process and product thereof |
| JPH0684494B2 (en) * | 1986-11-28 | 1994-10-26 | 東レ・ダウコーニング・シリコーン株式会社 | Silicone pressure sensitive adhesive composition |
| JPH0637614A (en) * | 1992-07-20 | 1994-02-10 | Toyota Autom Loom Works Ltd | Driving circuit for current driving type semiconductor switching element |
| JPH0684494A (en) * | 1992-09-01 | 1994-03-25 | Hitachi Ltd | Ion implanter |
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- 1995-10-09 JP JP7288089A patent/JP2631098B2/en not_active Expired - Lifetime
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|---|---|
| JPH08209104A (en) | 1996-08-13 |
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