JP2002097440A - Silicone adhesive composition - Google Patents

Silicone adhesive composition

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Publication number
JP2002097440A
JP2002097440A JP2000287577A JP2000287577A JP2002097440A JP 2002097440 A JP2002097440 A JP 2002097440A JP 2000287577 A JP2000287577 A JP 2000287577A JP 2000287577 A JP2000287577 A JP 2000287577A JP 2002097440 A JP2002097440 A JP 2002097440A
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JP
Japan
Prior art keywords
parts
weight
units
group
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.)
Granted
Application number
JP2000287577A
Other languages
Japanese (ja)
Other versions
JP4054942B2 (en
Inventor
Takahide Kobori
高秀 小堀
Shigeru Mori
滋 森
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.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
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Priority to JP2000287577A priority Critical patent/JP4054942B2/en
Publication of JP2002097440A publication Critical patent/JP2002097440A/en
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Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a silicon adhesive composition which exhibits an improved adhesive power to a silicone rubber, a metal, glass, or the like, exhibits an adhesive power very stronger than that of a conventional pressure-sensitive silicone adhesive, and can be cured at room temperature in a short time without the necessity for a primer treatment. SOLUTION: This composition contains, as indispensable ingredients, (A) a hydroxyl-terminated diorganopolysiloxane represented by the formula: HO(R12 SiO)nH (wherein R1 is a monovalent hydrocarbon group; and (n) is an integer of 200-2,000), (B) an organopolysiloxane resin having a molar ratio of SiO2 units to R23SiO0.5 units of (1:0.5)-(1:1.5), (C) an organohydrogenpolysiloxane having at least two Si-bonded hydrogen atoms, (D) an organic carboxylate of a metal selected from among tin, lead, iron, and zinc, (E) a boron-containing polysiloxane, and (F) a branched organopolysiloxane essentially comprising C6H5SiO1.5 units and [(CH3)2SiO]n units.

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、シリコーン接着剤
組成物に関し、特にシリコーンゴム/シリコーンゴム、
金属/金属及びシリコーンゴム/金属等の接着に優れた
接着性を有するシリコーン接着剤組成物に関する。
The present invention relates to a silicone adhesive composition, and more particularly to a silicone rubber / silicone rubber,
The present invention relates to a silicone adhesive composition having excellent adhesion to metal / metal and silicone rubber / metal.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来、
フィルム状の支持体上に、分子鎖末端が水酸基で封鎖さ
れた高重合度ジメチルポリシロキサンと、SiO単位
と(CHSiO0.5単位とからなる共重合体
(いわゆるMQレジン)とを縮合させて得られるシリコ
ーン粘着剤が知られている。しかし、この種の粘着剤は
粘着テープのように再剥離性を必要とする用途には適し
ているが、強力な接着力を要求される分野には適さな
い。
2. Description of the Related Art
A copolymer (a so-called MQ resin) consisting of a highly polymerized dimethylpolysiloxane having a molecular chain terminal blocked with a hydroxyl group on a film-like support, and SiO 2 units and (CH 3 ) 3 SiO 0.5 units. And silicone pressure-sensitive adhesives obtained by condensation of However, this kind of pressure-sensitive adhesive is suitable for applications requiring removability, such as pressure-sensitive adhesive tape, but is not suitable for fields requiring strong adhesion.

【0003】なお、粘着剤を接着剤として応用するには
鉛等の金属塩を触媒として、200℃/2時間以上の加
熱が必要であり、それをもってしても満足できる接着力
は得られず、特にシリコーンゴムに対しては実用にはほ
ど遠い接着力であった。
In order to apply a pressure-sensitive adhesive as an adhesive, it is necessary to heat at 200 ° C./2 hours or more using a metal salt such as lead as a catalyst. In particular, the adhesion was far from practical for silicone rubber.

【0004】強力な接着力を必要とする分野には、液状
シリコーンゴムが使用されているが、硬化時間が長く、
臭気や腐食性の問題がある。
[0004] Liquid silicone rubber is used in fields requiring strong adhesive strength, but the curing time is long,
Has odor or corrosive problems.

【0005】従って、本発明の目的はシリコーンゴム、
金属等に良く接着するシリコーン接着剤組成物を提供す
ることにある。
Accordingly, an object of the present invention is to provide silicone rubber,
An object of the present invention is to provide a silicone adhesive composition that adheres well to metals and the like.

【0006】[0006]

【課題を解決するための手段及び発明の実施の形態】本
発明者は、上記目的を達成するため鋭意検討を行った結
果、MQレジン、ヒドロキシル基含有ジオルガノポリシ
ロキサン、オルガノハイドロジェンポリシロキサン、分
岐型オルガノポリシロキサン、ホウ素含有ポリシロキサ
ン、及び有機カルボン酸金属塩からなる組成物を一定の
条件下で使用した場合、室温硬化でかつ短時間に良好な
接着性が得られ、特にシリコーンゴム/シリコーンゴ
ム、金属/金属、シリコーンゴム/金属の接着に優れた
接着性を与えることを知見し、本発明をなすに至った。
Means for Solving the Problems and Embodiments of the Invention The present inventors have made intensive studies to achieve the above object, and as a result, have found that MQ resin, hydroxyl-containing diorganopolysiloxane, organohydrogenpolysiloxane, When a composition comprising a branched organopolysiloxane, a boron-containing polysiloxane, and a metal salt of an organic carboxylic acid is used under certain conditions, good adhesion can be obtained at room temperature and in a short time. The present inventors have found that silicone rubber, metal / metal, and silicone rubber / metal provide excellent adhesion, and have accomplished the present invention.

【0007】即ち、本発明は、(A)下記一般式(1)That is, the present invention provides (A) the following general formula (1)

【化2】 (式中、Rは非置換又は置換一価炭化水素基を表し、
mは200〜2000の整数である。)で表される両末
端ヒドロキシル基含有ジオルガノポリシロキサン:10
0重量部、(B)SiO単位とR SiO0.5
位(Rは炭素数3以下の一価炭化水素基を表す)との
モル比が1:0.5〜1:1.5であるオルガノポリシ
ロキサン樹脂:150〜300重量部、(C)一分子中
に少なくとも2個のケイ素原子結合水素原子を含有する
オルガノハイドロジェンポリシロキサン:(A),
(B)成分の合計量100重量部に対し0.1〜2重量
部、(D)金属が錫、鉛、鉄及び亜鉛から選ばれる有機
カルボン酸金属塩:(A),(B)成分の合計量100
重量部に対し0.5〜5重量部、(E)ホウ素含有ポリ
シロキサン:(A),(B)成分の合計量100重量部
に対し0.05〜5重量部、(F)本質的にC
iO1.5単位と[(CHSiO]単位(nは
5〜100の整数)からなる分岐型オルガノポリシロキ
サン:(A),(B)成分の合計量100重量部に対し
0.1〜10重量部を必須成分とすることを特徴とする
シリコーン接着剤組成物を提供する。
Embedded image (Wherein, R 1 represents an unsubstituted or substituted monovalent hydrocarbon group,
m is an integer of 200 to 2000. ) A diorganopolysiloxane containing hydroxyl groups at both ends: 10
0 parts by weight, the molar ratio of (B) SiO 2 unit to R 2 3 SiO 0.5 unit (R 2 represents a monovalent hydrocarbon group having 3 or less carbon atoms) is 1: 0.5 to 1: 1 (C) an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in one molecule: (A),
0.1 to 2 parts by weight based on 100 parts by weight of the total amount of the component (B), (D) a metal salt of an organic carboxylic acid whose metal is selected from tin, lead, iron and zinc: components (A) and (B) Total amount 100
0.5 to 5 parts by weight based on parts by weight, (E) boron-containing polysiloxane: 0.05 to 5 parts by weight based on 100 parts by weight of the total amount of components (A) and (B), (F) essentially C 6 H 5 S
Branched organopolysiloxane consisting of 1.5 units of iO and n units of [(CH 3 ) 2 SiO] (n is an integer of 5 to 100): 0 based on 100 parts by weight of the total amount of components (A) and (B) The present invention provides a silicone adhesive composition characterized by comprising 1 to 10 parts by weight as an essential component.

【0008】以下、本発明につき更に詳しく説明する。
本発明のシリコーン粘着剤組成物において、上記(A)
成分は本発明の接着剤としての皮膜形成成分であり、
(C)成分の架橋剤と(D)成分の触媒作用により、
(B)成分と脱水縮合して硬化する。該(A)成分は分
子鎖の両末端に脱水反応に必要なヒドロキシル基を有す
ることが必要である。
Hereinafter, the present invention will be described in more detail.
In the silicone pressure-sensitive adhesive composition of the present invention, (A)
The component is a film forming component as an adhesive of the present invention,
By the cross-linking agent of component (C) and the catalytic action of component (D),
It hardens by dehydration condensation with the component (B). The component (A) needs to have hydroxyl groups necessary for a dehydration reaction at both ends of the molecular chain.

【0009】この(A)成分は、下記一般式(1)で表
されるものである。
The component (A) is represented by the following general formula (1).

【化3】 Embedded image

【0010】ここで、Rは非置換又は置換一価炭化水
素基であり、炭素数1〜12、特に1〜8のものが好ま
しく、具体的には、メチル基、エチル基、プロピル基、
ブチル基、ヘキシル基、オクチ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、トリル基等のアリール基、ベンジル基、フェ
ニルエチル基等のアラルキル基や、これらの基の水素原
子の一部又は全部をハロゲン原子やシアノ基等で置換し
た基などが挙げられるが、工業的観点からはメチル基が
好ましい。mは200〜2000の整数であり、このオ
ルガノポリシロキサンの粘度は25℃において10〜1
00Pa・sが好ましく、特に30〜70Pa・sのも
のが好ましい。粘度が10Pa・s未満では接着力及び
耐熱性が低くなり、100Pa・sを超えると作業性が
悪くなり、接着力も低くなる。
Here, R 1 is an unsubstituted or substituted monovalent hydrocarbon group, and preferably has 1 to 12 carbon atoms, particularly 1 to 8 carbon atoms, and specifically includes a methyl group, an ethyl group, a propyl group,
Alkyl groups such as butyl group, hexyl group and octyl group; alkenyl groups such as vinyl group, allyl group and propenyl group; aryl groups such as phenyl group and tolyl group; aralkyl groups such as benzyl group and phenylethyl group; Examples thereof include a group in which part or all of the hydrogen atoms of a group are substituted with a halogen atom, a cyano group, or the like, and a methyl group is preferable from an industrial viewpoint. m is an integer of 200 to 2000, and the viscosity of the organopolysiloxane is 10 to 1 at 25 ° C.
00 Pa · s is preferred, and especially 30 to 70 Pa · s is preferred. If the viscosity is less than 10 Pa · s, the adhesive strength and heat resistance will be low, and if it exceeds 100 Pa · s, the workability will be poor and the adhesive strength will be low.

【0011】(B)成分のオルガノポリシロキサン樹脂
は本発明の接着剤組成物の主成分であり、実質的にR
SiO0.5単位(M単位)とSiO単位(Q単
位)からなる粘着付与樹脂であり、これは一般的にMQ
レジンと呼ばれている。Rは炭素数3以下の一価の炭
化水素基を表し、特にメチル基、エチル基、プロピル基
等のアルキル基、アリル基等のアルケニル基から選択さ
れる有機基であり、全R 基の少なくとも95モル%は
メチル基であることが好ましい。また、M単位とQ単位
のモル比が0.5:1〜1.5:1の範囲内にあるもの
であるが、特に本発明の接着性組成物の場合には、0.
6:1〜1.2:1が好ましい。M単位が0.5未満に
なると接着力が低下し、1.5を超えると耐熱性が低下
する。該MQレジンの合成法は公知である。
Organopolysiloxane resin of component (B)
Is a main component of the adhesive composition of the present invention, and substantially R2
3SiO0.5Unit (M unit) and SiO2Unit (single Q
), Which is generally MQ
It is called resin. R2Is monovalent charcoal with 3 or less carbon atoms
Represents a hydride group, especially a methyl group, an ethyl group, or a propyl group
And alkenyl groups such as allyl groups.
Organic group, and all R 2At least 95 mol% of the groups
Preferably, it is a methyl group. Also, M unit and Q unit
Having a molar ratio of 0.5: 1 to 1.5: 1
In particular, in the case of the adhesive composition of the present invention, 0.1.
6: 1 to 1.2: 1 are preferred. M unit less than 0.5
When it becomes, the adhesive strength decreases, and when it exceeds 1.5, the heat resistance decreases.
I do. Methods for synthesizing the MQ resin are known.

【0012】(B)成分の本発明における配合量は、
(A)成分100重量部に対して150〜300重量部
である。150重量部未満では十分な接着力が得られ
ず、300重量部を超えるとタックが殆どなくなるた
め、基材と被着体の接着が困難となる。
The amount of component (B) in the present invention is as follows:
It is 150 to 300 parts by weight based on 100 parts by weight of the component (A). If the amount is less than 150 parts by weight, a sufficient adhesive strength cannot be obtained, and if it exceeds 300 parts by weight, almost no tack occurs, and it becomes difficult to adhere the substrate and the adherend.

【0013】(C)成分のオルガノハイドロジェンポリ
シロキサンは、(A)成分と(B)成分のオルガノポリ
シロキサンを架橋させるものであり、一分子中にケイ素
原子に結合している水素原子を少なくとも2個含有する
もの中から適宜選択することができ、直鎖状、分岐状、
環状等のいずれであっても良い。
The organohydrogenpolysiloxane of the component (C) crosslinks the organopolysiloxane of the component (A) with the organopolysiloxane of the component (B), and has at least one hydrogen atom bonded to a silicon atom in one molecule. It can be appropriately selected from those containing two, linear, branched,
Any of a ring shape and the like may be used.

【0014】このオルガノハイドロジェンポリシロキサ
ンとしては、下記平均組成式 R SiO(4−a−b)/2 (式中、Rは上記Rと同様の一価炭化水素基、aは
0.7〜2.1、bは0.001〜1.0で、a+b=
0.8〜3.0を満足する正数である。)で示され、好
ましくはケイ素原子数が2〜500個程度のものを使用
することができる。
The organohydrogenpolysiloxane includes the following average compositional formula: R 3 a Hb SiO (4-ab) / 2 (wherein R 3 is the same monovalent hydrocarbon group as R 1 described above; a is 0.7 to 2.1, b is 0.001 to 1.0, and a + b =
It is a positive number that satisfies 0.8 to 3.0. ), Preferably having about 2 to 500 silicon atoms.

【0015】具体的には、1,1,3,3−テトラメチ
ルジシロキサン、メチルハイドロジェンシクロポリシロ
キサン、メチルハイドロジェンシロキサン・ジメチルシ
ロキサン環状共重合体、両末端トリメチルシロキシ基封
鎖メチルハイドロジェンポリシロキサン、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、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、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シロキ
サン・メチルハイドロジェンシロキサン共重合体、両末
端トリメチルシロキシ基封鎖メチルハイドロジェンシロ
キサン・ジフェニルシロキサン共重合体、両末端トリメ
チルシロキシ基封鎖メチルハイドロジェンシロキサン・
ジフェニルシロキサン・ジメチルシロキサン共重合体、
両末端ジメチルハイドロジェンシロキシ基封鎖メチルハ
イドロジェンシロキサン・ジメチルシロキサン・ジフェ
ニルシロキサン共重合体、(CHHSiO1/2
単位と(CHSiO 1/2単位とSiO4/2
位とからなる共重合体、(CHHSiO1/
位とSiO4/2単位とからなる共重合体、(CH
HSiO1/2単位とSiO4/2単位と(C
SiO1/2単位とからなる共重合体などが
挙げられる。
Specifically, 1,1,3,3-tetramethyl
Rudisiloxane, methyl hydrogen cyclopolysilo
Xan, methyl hydrogen siloxane, dimethyl
Roxane cyclic copolymer, both ends trimethylsiloxy group sealed
Chain methyl hydrogen polysiloxane, both ends trim
Tylsiloxy group-blocked dimethyl siloxane / methyl hydride
Rogen siloxane copolymer, both ends dimethylhydro
Gensiloxy-blocked dimethylpolysiloxane, both ends
Dimethyl hydrogen siloxy group-blocked dimethyl siloxy
Sun methyl hydrogen siloxane copolymer, both ends
Trimethylsiloxy end-blocked methyl hydrogen silo
Xan-diphenylsiloxane copolymer, trimmed at both ends
Tylsiloxy-blocked methyl hydrogen siloxane
Diphenylsiloxane / dimethylsiloxane copolymer,
Both ends dimethyl hydrogensiloxy group-blocked methyl group
Hydrogensiloxane / Dimethylsiloxane / Dife
Nylsiloxane copolymer, (CH3)2HSiO1/2
Unit and (CH3)3SiO 1/2Unit and SiO4/2single
And a copolymer consisting of (CH3)2HSiO1 / 2single
And SiO4/2Copolymer consisting of units (CH3)
2HSiO1/2Unit and SiO4/2Unit and (C
6H5)3SiO1/2Copolymers consisting of units
No.

【0016】該(C)成分の配合量は、(A)成分と
(B)成分の共重合体100重量部に対し0.1〜2重
量部である。0.1重量部未満では十分な架橋が得られ
ず、2重量部を超えると、過剰であり、いずれも接着力
及び耐熱性が低下する。
The amount of the component (C) is 0.1 to 2 parts by weight based on 100 parts by weight of the copolymer of the components (A) and (B). If the amount is less than 0.1 part by weight, sufficient crosslinking cannot be obtained.

【0017】(D)成分の有機カルボン酸金属塩は、
(A)〜(C)成分のための硬化触媒であり、例えばジ
ブチル錫ジアセテート、ジブチル錫ジオクトエート、ジ
ブチル錫ジラウレート、錫オクトエート、錫ナフテー
ト、鉛オクトエート、鉄オクトエート、亜鉛オクトエー
ト等を挙げることができるが、これらの中でも特にジブ
チル錫ジアセテート、ジブチル錫ジオクトエートの錫塩
が好ましい。
The metal salt of an organic carboxylic acid as the component (D) is
A curing catalyst for the components (A) to (C), examples of which include dibutyltin diacetate, dibutyltin dioctoate, dibutyltin dilaurate, tin octoate, tin naphthate, lead octoate, iron octoate, and zinc octoate. Of these, dibutyltin diacetate and tin salts of dibutyltin dioctoate are particularly preferred.

【0018】該(D)成分の配合量は、(A)成分と
(B)成分の共重合体100重量部に対し0.5〜5重
量部である。0.5重量部未満では硬化性が遅く、5重
量部を超えるとポットライフが短くなり、作業性が悪く
なる。
The amount of the component (D) is 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer of the components (A) and (B). If the amount is less than 0.5 part by weight, the curability is slow, and if it exceeds 5 parts by weight, the pot life is shortened and the workability is deteriorated.

【0019】(E)成分のホウ素含有シロキサンは、
(A)〜(D)成分からなる接着剤組成物に、より強力
な接着性を付与するための接着助剤である。従来、基材
と基材との接着性を改良する目的で、予め基材にプライ
マー処理を施すことは公知であるが、作業性に劣る欠点
がある。本発明は(E)成分を本接着剤組成物中に添加
することにより、かかるプライマー処理は不要となるた
め作業性が向上する。
The boron-containing siloxane of the component (E) is
It is an adhesion aid for imparting stronger adhesiveness to the adhesive composition comprising the components (A) to (D). Conventionally, it has been known to apply a primer treatment to a substrate in advance for the purpose of improving the adhesion between the substrate and the substrate, but there is a disadvantage that the workability is poor. In the present invention, the addition of the component (E) to the present adhesive composition eliminates the need for such a primer treatment, thereby improving workability.

【0020】(E)成分のホウ素含有シロキサンはB−
O−Si結合を有する有機ケイ素化合物であれば特に限
定されないが、単量体は加水分解性が高いため、オリゴ
マー及びポリマーが好ましい。該ホウ素含有シロキサン
としては、例えば下記平均組成式(2) R (RO)SiO(4−c−d)/2 (2) (式中、Rは一価炭化水素基、Rは水素原子又は一
価炭化水素基を表し、c,dは、0<c<4、0<d<
4、かつ0<c+d<4を満足する正数である。)で示
されるオルガノポリシロキサンとホウ酸との反応物を挙
げることができる。
The boron-containing siloxane of component (E) is B-
There is no particular limitation as long as it is an organosilicon compound having an O-Si bond, but oligomers and polymers are preferred because monomers have high hydrolyzability. Examples of the boron-containing siloxane include, for example, the following average composition formula (2) R 4 c (R 5 O) d SiO (4-cd) / 2 (2) (wherein R 4 is a monovalent hydrocarbon group, R 5 represents a hydrogen atom or a monovalent hydrocarbon group, and c and d are 0 <c <4, 0 <d <
4 and a positive number satisfying 0 <c + d <4. )) And a reaction product of an organopolysiloxane and boric acid.

【0021】ここで、Rとしては、炭素数1〜12、
特に1〜8の一価炭化水素基が好ましく、具体的にはメ
チル基、エチル基、プロピル基、イソプロピル基、ブチ
ル基、イソブチル基等のアルキル基、フェニル基、トリ
ル基等のアリール基、ビニル基、アリル基等のアルケニ
ル基が例示され、またRとしては、水素原子又は炭素
数1〜12、特に1〜8の一価炭化水素基、具体的には
メチル基、エチル基、プロピル基、イソプロピル基等の
アルキル基、ビニル基、アリル基、イソプロペニル基等
のアルケニル基が例示されるが、一分子中のR,R
の各々は全て同一である必要はない。またホウ酸の水酸
基とRO基は特に合わせる必要はないが、等モルある
いはRO基過剰の方が本化合物の安定性の面で好まし
い。
Here, R 4 has 1 to 12 carbon atoms;
Particularly, a monovalent hydrocarbon group of 1 to 8 is preferable. Specifically, an alkyl group such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group and an isobutyl group, an aryl group such as a phenyl group and a tolyl group, and vinyl And R 5 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms, especially 1 to 8 carbon atoms, specifically, a methyl group, an ethyl group, a propyl group. And an alkenyl group such as an alkyl group such as isopropyl group and the like, a vinyl group, an allyl group and an isopropenyl group, and R 4 and R 5 in one molecule.
Need not all be the same. The hydroxyl group of boric acid and the R 5 O group do not need to be particularly matched, but an equimolar amount or an excess of R 5 O group is preferable in view of the stability of the present compound.

【0022】なお、上記オルガノポリシロキサンとホウ
酸との反応物は、該オルガノポリシロキサンとホウ酸と
を加熱下に反応させることにより得ることができ、一例
を挙げれば、B(OH)16重量部、CHSi(O
46重量部、(CHSi(OC
38重量部とを70℃で6時間の条件下で反応さ
せることにより得ることができる。
The above-mentioned reaction product of the organopolysiloxane and boric acid can be obtained by reacting the organopolysiloxane with boric acid under heating. For example, B (OH) 3 16 Parts by weight, CH 3 Si (O
C 2 H 5) 3 46 parts by weight, (CH 3) 2 Si ( OC 2 H
5) and 2 38 parts by weight can be obtained by reacting under the conditions of 6 hours at 70 ° C..

【0023】(E)成分の配合量は、(A)成分と
(B)成分の共重合体100重量部に対し、0.05〜
5重量部である。0.05重量部未満では接着性向上の
効果に乏しく、5重量部を超えると、耐熱性が低下す
る。
The amount of component (E) is from 0.05 to 100 parts by weight of the copolymer of component (A) and component (B).
5 parts by weight. If the amount is less than 0.05 part by weight, the effect of improving the adhesiveness is poor, and if it exceeds 5 parts by weight, the heat resistance decreases.

【0024】(F)成分の分岐型オルガノポリシロキサ
ンは、(A)〜(E)成分からなる本接着剤組成物の耐
熱性向上を目的に使用されるものであり、本質的にC
SiO1.5単位と[(CHSiO]単位
とからなるメチルフェニルポリシロキサンである。具体
的には、CSiXとX−[(CHSi
O]n−1(CHSiX(nは5〜100の整
数、Xはアルコキシ基、塩素等の加水分解性基)とを加
水分解し、続いて重合してなるオルガノポリシロキサン
であり、任意成分としてCCHSiX,(C
SiX,CHSiX,(C
iX等の加水分解性シランも添加しても良い。さらに
具体的には、CCHSiCl,CSi
Cl及びCl−[(CHSiO]20(C
SiClの共加水分解物をアルカリ重合するこ
とにより得られる。
The branched organopolysiloxane of the component (F) is used for the purpose of improving the heat resistance of the present adhesive composition comprising the components (A) to (E), and is essentially C 6.
It is a methylphenylpolysiloxane composed of 1.5 units of H 5 SiO and n units of [(CH 3 ) 2 SiO]. Specifically, C 6 H 5 SiX 3 and X-[(CH 3 ) 2 Si
O] n-1 (CH 3 ) 2 SiX (n is an integer of 5 to 100, X is a hydrolyzable group such as an alkoxy group or chlorine), and is an organopolysiloxane obtained by polymerization. , C 6 H 5 CH 3 SiX 2 , (C
H 3 ) 2 SiX 2 , CH 3 SiX 3 , (C 6 H 5 ) 2 S
hydrolyzable silane such as iX 2 may also be added. More specifically, C 6 H 5 CH 3 SiCl 2 , C 6 H 5 Si
Cl 3 and Cl - [(CH 3) 2 SiO] 20 (C
It is obtained by subjecting a co-hydrolysate of H 3 ) 2 SiCl to alkali polymerization.

【0025】(F)成分の配合量は、(A)成分と
(B)成分の共重合体100重量部に対し、0.1〜1
0重量部である。0.1重量部未満では十分な耐熱性が
得られず、10重量部を超えると十分な接着力が得られ
ない。
The amount of the component (F) is 0.1 to 1 part by weight based on 100 parts by weight of the copolymer of the components (A) and (B).
0 parts by weight. If it is less than 0.1 part by weight, sufficient heat resistance cannot be obtained, and if it exceeds 10 parts by weight, sufficient adhesive strength cannot be obtained.

【0026】一般に、本発明の接着剤組成物を得るに
は、まず(A)成分と(B)成分及び(F)成分をアル
カリ縮合触媒の存在下、25℃〜120℃で1時間〜1
0時間反応させる。この際トルエン又はキシレンのよう
な希釈溶剤を用いても良い。ついで得られた反応物に
(C),(E)成分を混合する。
Generally, in order to obtain the adhesive composition of the present invention, first, the components (A), (B) and (F) are mixed at 25 ° C. to 120 ° C. for 1 hour to 1 hour in the presence of an alkali condensation catalyst.
Incubate for 0 hours. At this time, a diluting solvent such as toluene or xylene may be used. Next, the components (C) and (E) are mixed with the obtained reaction product.

【0027】本発明の組成物は、無溶剤下あるいは溶剤
で希釈して使用される。塗工性改良や膜厚制御の目的
で、トルエン、キシレン、エチルベンゼン、ヘキサン、
ヘプタン、オクタン、メチルエチルケトン、酢酸エチル
等の溶剤で希釈しても良い。
The composition of the present invention is used without a solvent or after being diluted with a solvent. To improve coatability and control film thickness, toluene, xylene, ethylbenzene, hexane,
It may be diluted with a solvent such as heptane, octane, methyl ethyl ketone, and ethyl acetate.

【0028】このようにして得られた本発明のシリコー
ン接着剤組成物は、(D)成分を添加してから、種々の
基材に塗布し硬化させて接着層を形成させれば、優れた
接着特性が得られる。この基材としては、例えば、鉄、
銅、アルミニウム等の金属やポリエステル、ポリイミ
ド、ポリアミド、ポリイミドアミド等のプラスチック、
ガラスクロス等の布、和紙、合成紙等の紙、一般に接着
し難いシリコーンゴムなどが使用できる。
The silicone adhesive composition of the present invention thus obtained is excellent when the component (D) is added and then applied to various substrates and cured to form an adhesive layer. Adhesive properties are obtained. As this base material, for example, iron,
Metals such as copper and aluminum, and plastics such as polyester, polyimide, polyamide and polyimide amide,
Cloth such as glass cloth, paper such as Japanese paper and synthetic paper, and silicone rubber which is generally difficult to adhere to can be used.

【0029】(A)〜(F)成分を含有する本組成物
は、基材に塗布してから25℃〜50℃で5分〜30分
風乾した後、貼付してから室温で1時間放置するだけで
良好な接着力が得られ、さらに放置することでより強固
な接着力を得られる。
The present composition containing the components (A) to (F) is applied to a substrate, air-dried at 25 ° C. to 50 ° C. for 5 minutes to 30 minutes, attached, and left at room temperature for 1 hour. Good adhesive strength can be obtained simply by performing the process, and stronger adhesive strength can be obtained by further standing.

【0030】[0030]

【実施例】以下、実施例及び比較例を示し、本発明を具
体的に説明するが、本発明は下記の実施例に制限される
ものではない。なお、下記の例において部は重量部を示
す。また、実施例中に示した接着力は次の方法により測
定した。
EXAMPLES The present invention will be described below in detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. In addition, in the following examples, a part shows a weight part. Further, the adhesive force shown in the examples was measured by the following method.

【0031】(接着力の測定方法)基材にシリコーン接
着剤組成物を所定厚さ(0.8g/m)に塗工後、3
0分風乾してから、各種被着体に2kg重のゴムローラ
ーを用いて貼付し、試験片とした。該試験片を25℃・
55%RHで5時間静置後及び200℃中で24時間加
熱後、引き剥がし接着力はオートグラフ〔(株)島津製
作所製〕を用い、0.3m/min.のスピードで18
0°Peelで引き剥がした時の接着力を測定し、gf
/10mmの単位で表示した。また、剪断接着力はスト
ログラフ〔東洋精機(株)製〕を用い、50mm/mi
n.のスピードで垂直方向に引き剥がしたときの接着力
をgf/cmの単位で表示した。その結果を引き剥が
し接着力は表1に、剪断接着力は表2に示した。
(Measurement Method of Adhesive Strength) After applying the silicone adhesive composition to the base material to a predetermined thickness (0.8 g / m 2 ),
After air-drying for 0 minutes, the test pieces were affixed to various adherends using a 2 kg weight rubber roller to obtain test pieces. The test piece was placed at 25 ° C
After standing at 55% RH for 5 hours and heating at 200 ° C. for 24 hours, the peel adhesion was measured using an autograph (manufactured by Shimadzu Corporation) at 0.3 m / min. 18 at the speed of
The adhesive strength when peeled off at 0 ° Peel was measured and gf
It was indicated in units of / 10 mm. The shear adhesive strength was measured using a strograph (manufactured by Toyo Seiki Co., Ltd.) at 50 mm / mi.
n. The adhesive force when peeled off in the vertical direction at the speed of is shown in units of gf / cm 2 . The results are shown in Table 1 for peel adhesion and Table 2 for shear adhesion.

【0032】[実施例1]両末端ヒドロキシル基封鎖ジ
メチルポリシロキサン(粘度50Pa・s)100部、
(CHSiO0.5単位とSiO単位とからな
り、そのモル比が0.8:1.0であるメチルポリシロ
キサン200部、及びトルエン130部の混合物を11
0℃で5時間加熱攪拌した後、冷却して接着剤ベース溶
液(固形分70%)を得た。この溶液100部に対し、
平均組成式(CHSiO[(CH)HSiO]
38Si(CHで示されるメチルハイドロジェン
ポリシロキサン2部、(CHSiO1.5
0.1[(CHSiO]0.8(BO1.5
0.1で示されるホウ素含有ポリシロキサン1部、平均
組成式(CCHSiO)0.02(C
iO1.50.46[(CHSiO]0.52
で示される分岐型メチルフェニルポリシロキサン2部及
びCAT−PS−1(ジブチル錫ジアセテート、信越化
学製:製品名)3部を混合してシリコーン接着剤組成物
−1を得た。
Example 1 100 parts of dimethylpolysiloxane (viscosity: 50 Pa · s) having hydroxyl groups blocked at both ends,
A mixture of 200 parts of methylpolysiloxane and 130 parts of toluene consisting of 0.5 units of (CH 3 ) 3 SiO and 2 units of SiO 2 and having a molar ratio of 0.8: 1.0 is used.
After heating and stirring at 0 ° C. for 5 hours, the mixture was cooled to obtain an adhesive base solution (solid content: 70%). For 100 parts of this solution,
Average composition formula (CH 3 ) 3 SiO [(CH 3 ) HSiO]
38 parts of methyl hydrogen polysiloxane represented by Si (CH 3 ) 3 , (CH 3 SiO 1.5 )
0.1 [(CH 3 ) 2 SiO] 0.8 (BO 1.5 )
0.1 part of boron-containing polysiloxane represented by 0.1 , average composition formula (C 6 H 5 CH 3 SiO) 0.02 (C 6 H 5 S
iO 1.5) 0.46 [(CH 3 ) 2 SiO] 0.52
Was mixed with 3 parts of CAT-PS-1 (dibutyltin diacetate, manufactured by Shin-Etsu Chemical: product name) to obtain a silicone adhesive composition-1.

【0033】[実施例2]実施例1の両末端ヒドロキシ
ル基封鎖ジメチルポリシロキサンの粘度を10Pa・s
に替えた以外は、実施例1と同様にしてシリコーン接着
剤組成物−2を得た。
Example 2 The viscosity of the dimethylpolysiloxane having hydroxyl groups blocked at both ends in Example 1 was 10 Pa · s.
Except having changed to, the silicone adhesive composition-2 was obtained in the same manner as in Example 1.

【0034】[実施例3]実施例1の(CHSi
0.5単位とSiO単位とのモル比が0.8:1.
0であるメチルポリシロキサンの配合量を160部に替
えた以外は、実施例1と同様にしてシリコーン接着剤組
成物−3を得た。
Example 3 (CH 3 ) 3 Si of Example 1
The molar ratio of O 0.5 units to SiO 2 units is 0.8: 1.
Silicone adhesive composition-3 was obtained in the same manner as in Example 1, except that the blending amount of methylpolysiloxane, which was 0, was changed to 160 parts.

【0035】[比較例1]実施例1のホウ素含有ポリシ
ロキサンを全く配合せずに、その他は実施例1と同様に
してシリコーン接着剤組成物−4を得た。
Comparative Example 1 A silicone adhesive composition-4 was obtained in the same manner as in Example 1 except that the boron-containing polysiloxane of Example 1 was not added at all.

【0036】[比較例2]実施例1の分岐型メチルフェ
ニルポリシロキサンを全く配合せずに、その他は実施例
1と同様にしてシリコーン接着剤組成物−5を得た。
Comparative Example 2 A silicone adhesive composition-5 was obtained in the same manner as in Example 1 except that the branched methylphenylpolysiloxane of Example 1 was not added at all.

【0037】[比較例3]実施例1の両末端ヒドロキシ
ル基封鎖ジメチルポリシロキサンの粘度を500Pa・
sに替えた以外は、実施例1と同様にしてシリコーン接
着剤組成物−6を得た。
Comparative Example 3 The viscosity of the dimethylpolysiloxane having hydroxyl groups blocked at both ends of Example 1 was 500 Pa ·
Except having replaced by s, it carried out similarly to Example 1, and obtained silicone adhesive composition-6.

【0038】[比較例4]実施例1の(CHSi
0.5単位とSiO単位とからなり、そのモル比が
0.8:1.0であるメチルポリシロキサンの配合量を
130部に替えた以外は、実施例1と同様にしてシリコ
ーン接着剤組成物−7を得た。
Comparative Example 4 (CH 3 ) 3 Si of Example 1
Silicone bonding was carried out in the same manner as in Example 1 except that the mixing amount of methylpolysiloxane consisting of 0.5 units of O and 2 units of SiO 2 and having a molar ratio of 0.8: 1.0 was changed to 130 parts. Agent composition-7 was obtained.

【0039】[比較例5]一般に知られている両末端ヒ
ドロキシル基封鎖ジメチルポリシロキサン(粘度1万P
a・s)100部とM:Q=0.85:1.0のMQレ
ジン130部からなるシリコーン100部に過酸化ベン
ゾイル2部を混合して得た粘着剤−1を基材に所定厚に
塗工し、150℃で15分硬化させてから、実施例と同
様に被着体に貼り合わせ、所定時間静置後接着力を測定
した。
[Comparative Example 5] A dimethylpolysiloxane having a hydroxyl group blocked at both ends, which is generally known (viscosity of 10,000 P
a · s) Adhesive-1 obtained by mixing 2 parts of benzoyl peroxide with 100 parts of silicone composed of 100 parts and 130 parts of MQ resin of M: Q = 0.85: 1.0 is applied to a substrate having a predetermined thickness. And cured at 150 ° C. for 15 minutes, then bonded to an adherend in the same manner as in the example, and allowed to stand for a predetermined time before measuring the adhesive force.

【0040】[0040]

【表1】 [Table 1]

【0041】[0041]

【表2】 *1:KE−951U(信越化学工業(株)製;厚み2
mm) *2:JIS SH−748−L((株)テストピース
製;厚み0.3mm) *3:25℃・55%RH×10時間静置後 *4:200℃×20時間後 *5:JIS SH−741−A((株)テストピース
製;厚み0.3mm) *6:JIS SG−743−A((株)テストピース
製;厚み0.3mm) *7:KE−4603U(信越化学工業(株)製;厚み
2mm)
[Table 2] * 1: KE-951U (manufactured by Shin-Etsu Chemical Co., Ltd .; thickness 2)
mm) * 2: JIS SH-748-L (manufactured by Test Piece Co., Ltd .; thickness 0.3 mm) * 3: After standing at 25 ° C. and 55% RH × 10 hours * 4: After 200 ° C. × 20 hours * 5 : JIS SH-741-A (manufactured by Test Piece Co., Ltd .; thickness 0.3 mm) * 6: JIS SG-743-A (manufactured by Test Piece Co., Ltd .; thickness 0.3 mm) * 7: KE-4603U (Shin-Etsu) (Manufactured by Chemical Industry Co., Ltd .; thickness 2 mm)

【0042】[0042]

【発明の効果】本発明のシリコーン接着剤組成物によれ
ば、シリコーンゴム、金属、ガラス等に対する接着力が
改良され、従来のシリコーン粘着剤より大幅に接着力が
向上し、かつプライマー処理することなく室温で短時間
に硬化することができるため、作業性にも優れている。
According to the silicone adhesive composition of the present invention, the adhesive strength to silicone rubber, metal, glass, etc. is improved, the adhesive strength is significantly improved as compared with conventional silicone adhesives, and primer treatment is performed. It can be cured in a short time at room temperature without any problems, and therefore has excellent workability.

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 4J040 EK031 EK042 EK062 EK072 GA01 GA32 HD41 HD43 JA02 JB02 JB05 KA14 KA16 KA25 LA05 LA06 LA08 MA02 MA05 MA09 MA10 MA12 NA16 PA30 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4J040 EK031 EK042 EK062 EK072 GA01 GA32 HD41 HD43 JA02 JB02 JB05 KA14 KA16 KA25 LA05 LA06 LA08 MA02 MA05 MA09 MA10 MA12 NA16 PA30

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (A)下記一般式(1) 【化1】 (式中、Rは非置換又は置換一価炭化水素基を表し、
mは200〜2000の整数である。)で表される両末
端ヒドロキシル基含有ジオルガノポリシロキサン:10
0重量部、(B)SiO単位とR SiO0.5
位(Rは炭素数3以下の一価炭化水素基を表す)との
モル比が1:0.5〜1:1.5であるオルガノポリシ
ロキサン樹脂:150〜300重量部、(C)一分子中
に少なくとも2個のケイ素原子結合水素原子を含有する
オルガノハイドロジェンポリシロキサン:(A),
(B)成分の合計量100重量部に対し0.1〜2重量
部、(D)金属が錫、鉛、鉄及び亜鉛から選ばれる有機
カルボン酸金属塩:(A),(B)成分の合計量100
重量部に対し0.5〜5重量部、(E)ホウ素含有ポリ
シロキサン:(A),(B)成分の合計量100重量部
に対し0.05〜5重量部、(F)本質的にC
iO1.5単位と[(CHSiO]単位(nは
5〜100の整数)からなる分岐型オルガノポリシロキ
サン:(A),(B)成分の合計量100重量部に対し
0.1〜10重量部を必須成分とすることを特徴とする
シリコーン接着剤組成物。
(A) The following general formula (1): (Wherein, R 1 represents an unsubstituted or substituted monovalent hydrocarbon group,
m is an integer of 200 to 2000. ) A diorganopolysiloxane containing hydroxyl groups at both ends: 10
0 parts by weight, the molar ratio of (B) SiO 2 unit to R 2 3 SiO 0.5 unit (R 2 represents a monovalent hydrocarbon group having 3 or less carbon atoms) is 1: 0.5 to 1: 1 (C) an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in one molecule: (A),
0.1 to 2 parts by weight based on 100 parts by weight of the total amount of the component (B), (D) a metal salt of an organic carboxylic acid whose metal is selected from tin, lead, iron and zinc: components (A) and (B) Total amount 100
0.5 to 5 parts by weight based on parts by weight, (E) boron-containing polysiloxane: 0.05 to 5 parts by weight based on 100 parts by weight of the total amount of components (A) and (B), (F) essentially C 6 H 5 S
Branched organopolysiloxane consisting of 1.5 units of iO and n units of [(CH 3 ) 2 SiO] (n is an integer of 5 to 100): 0 based on 100 parts by weight of the total amount of components (A) and (B) A silicone adhesive composition comprising 1 to 10 parts by weight as an essential component.
JP2000287577A 2000-09-21 2000-09-21 Silicone adhesive composition Expired - Fee Related JP4054942B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957398B1 (en) 2002-05-01 2010-05-11 신에쓰 가가꾸 고교 가부시끼가이샤 Addition-Curable Silicone Rubber Composition
CN106753201A (en) * 2016-12-14 2017-05-31 中蓝晨光化工研究设计院有限公司 A kind of automotive electronics label silicon rubber bonder and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957398B1 (en) 2002-05-01 2010-05-11 신에쓰 가가꾸 고교 가부시끼가이샤 Addition-Curable Silicone Rubber Composition
CN106753201A (en) * 2016-12-14 2017-05-31 中蓝晨光化工研究设计院有限公司 A kind of automotive electronics label silicon rubber bonder and preparation method thereof

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Publication number Publication date
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