JP2008013613A - Silicone composition for forming peelable cured film and coated product of the same - Google Patents

Silicone composition for forming peelable cured film and coated product of the same Download PDF

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JP2008013613A
JP2008013613A JP2006184005A JP2006184005A JP2008013613A JP 2008013613 A JP2008013613 A JP 2008013613A JP 2006184005 A JP2006184005 A JP 2006184005A JP 2006184005 A JP2006184005 A JP 2006184005A JP 2008013613 A JP2008013613 A JP 2008013613A
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cured film
silicone composition
polyorganosiloxane
forming
peelable cured
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Shinya Moriyama
真也 護山
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Momentive Performance Materials Japan LLC
Momentive Performance Materials Inc
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Momentive Performance Materials Japan LLC
Momentive Performance Materials Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a silicone composition for forming peelable cured film having moderate peelability and improved crawling phenomenon in coating a pressure sensitive adhesive. <P>SOLUTION: The silicone composition for forming peelable cured film of an addition reaction type or an ultraviolet ray curing type comprises (A) 100 pts.wt. of a polyorganosiloxane as a base polymer, 0.1-50 pts.wt. of a condensation product (B) of (b-1) a branched polyorganosiloxane having at least one hydroxyl group bonding to a silicon atom in a molecule with a (b-2) a linear polyorganosiloxane with ≥100 of degree of polymerization and a hydroxyl group on a terminal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、粘着剤を塗布する際のハジキ現象が改善された剥離性硬化皮膜形成用シリコーン組成物及びその塗工品に関するものである。   The present invention relates to a peelable cured film-forming silicone composition with improved repellency when a pressure-sensitive adhesive is applied, and a coated product thereof.

従来、紙やプラスチックフィルム等の基材にポリオルガノシロキサン組成物からなる硬化皮膜を形成し、これら基材と粘着性物質との剥離を容易にする技術が知られており、このオルガノポリシロキサン組成物としてはその硬化反応機構から、付加反応型、縮合反応型、紫外線硬化型のものが用いられている。   Conventionally, a technique for forming a cured film composed of a polyorganosiloxane composition on a base material such as paper or plastic film and facilitating peeling between the base material and an adhesive substance is known. As the product, an addition reaction type, a condensation reaction type, or an ultraviolet curing type is used because of its curing reaction mechanism.

これらの組成物の硬化皮膜は、表面エネルギーが小さいため、剥離性に優れているものの、粘着テープやラベル等の製造時において、硬化皮膜上に粘着剤を塗布する際、粘着剤のハジキ現象が生じることがあり、良好な粘着層が得られないことがあった。この問題は、ハジキ現象を生じさせやすいエマルジョン型粘着剤を塗布する場合に特に顕著になる。   Although the cured films of these compositions have excellent peelability due to their low surface energy, when the adhesive is applied onto the cured film during the production of adhesive tapes and labels, the adhesive repelling phenomenon occurs. In some cases, a good adhesive layer could not be obtained. This problem is particularly noticeable when an emulsion-type pressure-sensitive adhesive that tends to cause a cissing phenomenon is applied.

この問題を解決し、ハジキ現象が改善された良好な粘着層を得るための従来技術として、シロキサン変性したアクリルポリマーを用いた剥離用コーティング組成物が提案されているが(特許文献1)、製造が煩雑であるとともに、剥離力の重い硬化皮膜しか得られず、良好な剥離性が得られないという問題があった。
特開平6−329987号公報
As a conventional technique for solving this problem and obtaining a good adhesive layer with improved repelling phenomenon, a coating composition for peeling using a siloxane-modified acrylic polymer has been proposed (Patent Document 1). However, there is a problem that only a cured film having a heavy peeling force can be obtained and good peelability cannot be obtained.
JP-A-6-329987

本発明はかかる従来技術の問題点を解決し、適度な剥離性を有すると共に、粘着剤を塗布する際のハジキ現象が改善された剥離性硬化皮膜形成用シリコーン組成物を提供することを目的とする。   An object of the present invention is to solve the problems of the prior art and to provide a silicone composition for forming a peelable cured film having an appropriate peelability and an improved repellency phenomenon when applying an adhesive. To do.

本発明者らは、かかる目的を達成するため鋭意検討を重ねた結果、剥離性硬化皮膜形成用シリコーン組成物中に、分岐状ポリオルガノシロキサンと直鎖状ポリオルガノシロキサンとの縮合反応生成物を配合することにより、上記目的が達成され、ハジキ現象が改善された剥離性硬化皮膜形成用シリコーン組成物が得られることを見出し、本発明に到達した。   As a result of intensive studies in order to achieve such an object, the present inventors have found that a condensation reaction product of a branched polyorganosiloxane and a linear polyorganosiloxane is contained in a silicone composition for forming a peelable cured film. By blending, it was found that a silicone composition for forming a peelable cured film in which the above-described object was achieved and the repellency phenomenon was improved was obtained, and the present invention was achieved.

即ち、本発明は、付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物において、
(A) ベースポリマーとなるポリオルガノシロキサン100重量部に対し、
(B) (b-1) ケイ素原子に結合する水酸基を1分子中に少なくとも1個有する分岐状ポリオルガノシロキサンと、(b-2) 末端に水酸基を持つ重合度が100以上の直鎖状ポリオルガノシロキサンとの縮合反応生成物を0.1〜50重量部配合することを特徴とする剥離性硬化皮膜形成用シリコーン組成物である。
That is, the present invention provides an addition reaction curable type or ultraviolet curable type peelable cured film-forming silicone composition,
(A) For 100 parts by weight of polyorganosiloxane as a base polymer,
(B) (b-1) a branched polyorganosiloxane having at least one hydroxyl group bonded to a silicon atom in one molecule, and (b-2) a linear poly having a degree of polymerization of 100 or more having a hydroxyl group at the terminal. A silicone composition for forming a peelable cured film, comprising 0.1 to 50 parts by weight of a condensation reaction product with an organosiloxane.

以下、本発明を詳細に説明する。本発明の付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物は、一般に使用されている公知のもので、特に制限なく何れのものも使用できる。   Hereinafter, the present invention will be described in detail. The addition reaction curable type or ultraviolet curable type silicone composition for forming a peelable cured film of the present invention is a commonly used silicone composition, and any silicone composition can be used without any particular limitation.

この付加反応硬化型ポリオルガノシロキサンは、ベースポリマーであるアルケニル基含有ポリオルガノシロキサン、架橋剤であるハイドロジェン基含有ポリオルガノシロキサン、硬化用触媒である白金化合物、からなるものであることは周知の通りである。   It is well known that this addition reaction curable polyorganosiloxane comprises a base polymer alkenyl group-containing polyorganosiloxane, a crosslinking agent hydrogen group-containing polyorganosiloxane, and a curing catalyst platinum compound. Street.

アルケニル基含有ポリオルガノシロキサンとしては、直鎖状でも分岐状でも環状でも良く、またこれらの混合物であっても良い。また1分子中に少なくとも2個のアルケニル基が含有されていれば良く、好ましくは1分子中の全置換基のうち、0.1〜50mol%、特に得られる組成物の硬化性、剥離性などから、0.5〜10mol%であることが好ましい。このアルケニル基は、分子鎖末端、分子鎖側端、いずれの位置に結合していてもよいが、硬化物が優れた機械的強度を有するためには、少なくとも分子鎖末端にあることが好ましい。   The alkenyl group-containing polyorganosiloxane may be linear, branched or cyclic, or a mixture thereof. Further, it is sufficient that at least two alkenyl groups are contained in one molecule, and preferably 0.1 to 50 mol% of all substituents in one molecule, especially the curability and peelability of the resulting composition. From 0.5 to 10 mol%, it is preferable. The alkenyl group may be bonded to any position of the molecular chain end or the molecular chain side end, but is preferably at least at the molecular chain end in order for the cured product to have excellent mechanical strength.

アルケニル基含有ポリオルガノシロキサンにおけるその他の官能基としては、1価の置換または非置換の炭化水素基であり、メチル、エチル、プロピル、ブチル、ヘキシル、ドデシルなどのアルキル基;フェニル基などのアリール基;2−フェニルエチル、2−フェニルプロピルなどのアラルキル基;クロロメチル、3,3,3 −トリフルオロプロピルなどの置換炭化水素基などが例示される。尚、一般的にはメチル基、フェニル基が合成のし易さから好ましい。   Other functional groups in the alkenyl group-containing polyorganosiloxane are monovalent substituted or unsubstituted hydrocarbon groups, alkyl groups such as methyl, ethyl, propyl, butyl, hexyl and dodecyl; aryl groups such as phenyl groups Aralkyl groups such as 2-phenylethyl and 2-phenylpropyl; substituted hydrocarbon groups such as chloromethyl and 3,3,3-trifluoropropyl; In general, a methyl group and a phenyl group are preferable from the viewpoint of easy synthesis.

ハイドロジェン基含有ポリオルガノシロキサンは、架橋剤となる成分である。その配合量は、ベースポリマーのアルケニル基1個に対し、ハイドロジェン原子が0.5〜20個となる量であり、硬化性、優れた剥離特性を有する組成物を得たい場合には、0.5〜10個の範囲が好ましい。0.5個より少ないと、硬化が十分に進行せず、20個を超えると、良好な剥離性が得られなくなってしまう。また、1分子に含まれるケイ素原子に結合したハイドロジェン基数は少なくとも2個以上であることが必要であるが、その他の条件、ハイドロジェン基以外の有機基、結合位置、重合度、構造等については特に限定されず、また2種以上のハイドロジェン基含有ポリオルガノシロキサンを使用してもよい。   The hydrogen group-containing polyorganosiloxane is a component that serves as a crosslinking agent. The amount is 0.5 to 20 hydrogen atoms relative to one alkenyl group of the base polymer, and 0% is desired to obtain a composition having curability and excellent peeling properties. A range of 5 to 10 is preferred. If it is less than 0.5, curing will not proceed sufficiently, and if it exceeds 20, good peelability cannot be obtained. In addition, the number of hydrogen groups bonded to silicon atoms contained in one molecule must be at least 2 or more, but other conditions, organic groups other than hydrogen groups, bonding positions, polymerization degree, structure, etc. Is not particularly limited, and two or more hydrogen group-containing polyorganosiloxanes may be used.

白金化合物は、ベースポリマーのアルケニル基とハイドロジェン基含有ポリオルガノシロキサンのハイドロジェン基を反応させ、硬化物を得るための硬化用触媒である。この白金化合物としては、塩化白金酸、白金オレフィン錯体、白金ビニルシロキサン錯体、白金リン錯体、白金アルコール錯体、白金黒等が例示される。その配合量は、ベースポリマーのアルケニル基含有ポリオルガノシロキサンに対し、白金元素として1〜1000ppmとなる量である。   The platinum compound is a curing catalyst for obtaining a cured product by reacting the alkenyl group of the base polymer with the hydrogen group of the hydrogen group-containing polyorganosiloxane. Examples of the platinum compound include chloroplatinic acid, platinum olefin complex, platinum vinylsiloxane complex, platinum phosphorus complex, platinum alcohol complex, platinum black and the like. The blending amount is an amount of 1 to 1000 ppm as platinum element with respect to the alkenyl group-containing polyorganosiloxane of the base polymer.

紫外線硬化型ポリオルガノシロキサンには、以下のようなものがある。
(1) 分子中にオキシラン環またはオキセタン環、あるいはビニルエーテル構造を持つ官能基を有するポリオルガノシロキサンを、光カチオン発生型触媒の存在下で硬化させるもの。
(2) アルケニル基含有ポリオルガノシロキサンと、ヒドロシリル基含有ポリオルガノシロキサンを、白金系触媒の存在下で硬化させるもの。
(3) (メタ)アクリル基含有ポリオルガノシロキサンを、ラジカル開裂型光反応触媒の存在下で硬化させるもの。
(4) アルケニル基含有ポリオルガノシロキサンと、メルカプト基含有ポリオルガノシロキサンを、ラジカル開裂型光反応触媒の存在下で硬化させるもの。
Examples of the ultraviolet curable polyorganosiloxane include the following.
(1) A polyorganosiloxane having a functional group having an oxirane ring or oxetane ring or a vinyl ether structure in the molecule is cured in the presence of a photocation generating catalyst.
(2) A product in which an alkenyl group-containing polyorganosiloxane and a hydrosilyl group-containing polyorganosiloxane are cured in the presence of a platinum-based catalyst.
(3) A material in which a (meth) acrylic group-containing polyorganosiloxane is cured in the presence of a radical-cleavage photoreaction catalyst.
(4) A product in which an alkenyl group-containing polyorganosiloxane and a mercapto group-containing polyorganosiloxane are cured in the presence of a radical-cleavage photoreaction catalyst.

これらのいずれを用いても良いが、硬化性、生産性、硬化皮膜の特性などから(1)のタイプが好ましい。これらの付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物は、作業性等の面から、トルエン、キシレン、メチルエチルケトン等の有機溶剤に希釈された状態でもよい。   Any of these may be used, but the type (1) is preferred from the viewpoints of curability, productivity, and cured film characteristics. These addition reaction curable type or ultraviolet curable type silicone compositions for forming a peelable cured film may be diluted with an organic solvent such as toluene, xylene or methyl ethyl ketone from the viewpoint of workability.

次に本発明の特徴成分である(B) (b-1) 分岐状ポリオルガノシロキサンと(b-2) 直鎖状ポリオルガノシロキサンとの縮合反応生成物について説明する。   Next, the condensation reaction product of (B) (b-1) branched polyorganosiloxane and (b-2) linear polyorganosiloxane, which is a characteristic component of the present invention, will be described.

(B) 成分中の(b-1) は、ケイ素原子に結合する水酸基を1分子中に少なくとも1個有する分岐状ポリオルガノシロキサンである。(b-1) の分岐状ポリオルガノシロキサンは、主にRSiO1/2単位とSiO単位からなるが、RSiO単位、RSiO3/2単位を有していても良く、1分子中に少なくとも1個の水酸基を持つものである。 (B-1) in the component (B) is a branched polyorganosiloxane having at least one hydroxyl group bonded to a silicon atom in one molecule. The branched polyorganosiloxane (b-1) mainly comprises R 3 SiO 1/2 units and SiO 2 units, but may have R 2 SiO units and RSiO 3/2 units. It has at least one hydroxyl group inside.

上式中、Rはアルキル基、アルケニル基およびアリール基からなる群より選択された何れかを示すが、合成が容易なことからメチル基が好ましい。また一般的には、RSiO1/2単位とSiO単位の比が、SiO単位1モルに対してRSiO1/2単位が0.5〜1.3モルであるものが用いられる。 In the above formula, R represents any one selected from the group consisting of an alkyl group, an alkenyl group, and an aryl group, and a methyl group is preferable because of easy synthesis. Also in general, the ratio of R 3 SiO 1/2 units and SiO 2 units, those R 3 SiO 1/2 units is 0.5 to 1.3 moles with respect to SiO 2 units 1 mole It is done.

(B) 成分中の(b-2) は、末端に水酸基を持つ重合度が100以上の直鎖状ポリオルガノシロキサンである。ケイ素原子に結合する水酸基以外の有機基としては、アルキル基、アルケニル基およびアリール基からなる群より選択された何れかであり、一般的にメチル基等のアルキル基である。(b-2) は、皮膜の性能上から、重合度が100以上であることが必要であり、好ましくは重合度300〜20000のものが使用される。   (B-2) in the component (B) is a linear polyorganosiloxane having a hydroxyl group at the terminal and a degree of polymerization of 100 or more. The organic group other than the hydroxyl group bonded to the silicon atom is any one selected from the group consisting of an alkyl group, an alkenyl group, and an aryl group, and is generally an alkyl group such as a methyl group. (b-2) needs to have a degree of polymerization of 100 or more from the viewpoint of the performance of the film, and preferably has a degree of polymerization of 300 to 20000.

(b-1) 分岐状ポリオルガノシロキサンと(b-2) 直鎖状ポリオルガノシロキサンとの組成比は、目的の皮膜特性を得るためには、重量基準で(b-1) /(b-2) =10/90〜90/10の範囲が好ましい。   The composition ratio of (b-1) branched polyorganosiloxane and (b-2) linear polyorganosiloxane is (b-1) / (b- 2) A range of = 10/90 to 90/10 is preferable.

また、(B) 成分の縮合反応生成物は、製造プロセス、最終形態の作業性等の面から、トルエン、キシレン、メチルエチルケトン等の有機溶剤に希釈された状態で使用してもよい。   Further, the condensation reaction product of the component (B) may be used in a state diluted with an organic solvent such as toluene, xylene, methyl ethyl ketone or the like from the viewpoint of the production process, workability of the final form, and the like.

(b-1) 分岐状ポリオルガノシロキサンと(b-2) 直鎖状ポリオルガノシロキサンとの縮合反応は、公知の手法により行うことができる。即ち、(b-1) 分岐状ポリオルガノシロキサンを必要により有機溶剤に希釈し、これに(b-2) 直鎖状ポリオルガノシロキサンを加え、水酸化ナトリウム等を加え、加熱攪拌することにより目的の縮合反応生成物を得ることができる。   The condensation reaction between (b-1) branched polyorganosiloxane and (b-2) linear polyorganosiloxane can be carried out by a known method. That is, (b-1) dilute the branched polyorganosiloxane in an organic solvent if necessary, add (b-2) linear polyorganosiloxane, add sodium hydroxide, etc., and heat and stir. The condensation reaction product can be obtained.

(B) 成分の縮合反応生成物の配合量は、付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物のベースポリマーであるポリオルガノシロキサン100重量部に対し、0.1〜50重量部である。0.1重量部未満では目的とする効果が得られず、50重量部を超えると剥離力が大きくなりすぎ、目的とする剥離性硬化皮膜が得られなくなる。   The blending amount of the condensation reaction product of the component (B) is 0.1 to 100 parts by weight of the polyorganosiloxane which is the base polymer of the silicone composition for forming a peelable cured film of addition reaction curing type or ultraviolet curing type. 50 parts by weight. If the amount is less than 0.1 part by weight, the intended effect cannot be obtained.

かかる(B) 成分を配合することにより、粘着剤を塗布する際のハジキ現象が改善される理由の詳細は明らかではないが、後記する比較例2のように(b-1) 分岐状ポリオルガノシロキサンと(b-2) 直鎖状ポリオルガノシロキサンとの混合物を配合したのでは本発明所期の効果が得られないことから、以下のようなことが考えられる。もともと分岐状ポリオルガノシロキサンは、直鎖状のものに比べて表面エネルギーが大きく、粘着剤やマジックインキをはじきにくい性質がある。これを(A)成分に混合してもハジキに対して効果がないのは、系内に細かく均一に分散されて、皮膜表面にその性質をあらわすのに充分な量が出てこないのに対し、これを直鎖状ポリオルガノシロキサンと縮合することにより、表面エネルギーの大きい部分を持つ巨大分子が形成され、これが硬化皮膜上に点在することによって本発明の効果が得られたと推測する。   Although details of the reason why the repelling phenomenon upon application of the pressure-sensitive adhesive is improved by blending the component (B) is not clear, as in Comparative Example 2 described later, (b-1) branched polyorgano The following effects are conceivable because the effects of the present invention cannot be obtained by blending a mixture of siloxane and (b-2) a linear polyorganosiloxane. Originally, branched polyorganosiloxane has a surface energy higher than that of a straight chain, and has the property of hardly repelling adhesive and magic ink. Mixing this with component (A) has no effect on repellency because it is finely and evenly dispersed in the system and does not come out in an amount sufficient to express its properties on the coating surface. By condensing this with a linear polyorganosiloxane, a macromolecule having a portion having a large surface energy is formed, and it is presumed that the effect of the present invention was obtained by being scattered on the cured film.

本発明のシリコーン組成物には、以上の成分の他に、さらに必要に応じて、粉体、剥離性調整剤、反応調節剤、顔料、染料等を、本発明の効果を阻害しない範囲で配合することができる。   In addition to the above-described components, the silicone composition of the present invention may further contain powders, peelability modifiers, reaction modifiers, pigments, dyes, etc., as necessary, within a range that does not hinder the effects of the present invention can do.

本発明の剥離性硬化皮膜形成用シリコーン組成物は、上記付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物に(B) 成分の縮合反応生成物および任意成分を均一に混合することにより得られる。   The silicone composition for forming a peelable cured film of the present invention is obtained by uniformly mixing the condensation reaction product of component (B) and an optional component with the above addition reaction curable type or ultraviolet curable silicone composition for forming a peelable cured film. Can be obtained.

本発明の剥離性硬化皮膜形成用シリコーン組成物による基材の処理はこれをそのまま使用してもよいが、この使用に当たっては必要に応じてこれをトルエン、キシレン、メチルエチルケトン、酢酸エチル、ヘキサン、ヘプタンなどの有機溶媒に分散、溶解して用いてもよい。この組成物による基材の処理は、ロールコーター、グラビヤコーター、バーコーターなどの公知の塗工機を用いて、紙、プラスチックフィルム、金属箔等の各種基材に塗工すればよく、次いで常法により加熱(80℃以上程度)あるいは短時間の紫外線照射により硬化され、剥離性の硬化皮膜が形成される。本発明の組成物で処理された基材は、適度な剥離性を有すると共に、粘着剤を塗布する際のハジキ現象が改善されたものとなる。   The treatment of the base material with the silicone composition for forming a peelable cured film of the present invention may be used as it is. However, in this use, this is treated with toluene, xylene, methyl ethyl ketone, ethyl acetate, hexane, heptane as necessary. You may disperse | distribute and melt | dissolve in organic solvents, such as. The treatment of the substrate with this composition may be performed on various substrates such as paper, plastic film, metal foil, etc. using a known coating machine such as a roll coater, gravure coater, bar coater, etc. The film is cured by heating (approximately 80 ° C. or higher) or short-time ultraviolet irradiation to form a peelable cured film. The base material treated with the composition of the present invention has an appropriate peelability and an improved repelling phenomenon when an adhesive is applied.

次に、本発明を実施例によりさらに詳細に説明するが、本発明はこれらの実施例に限定されるものではない。尚、以下の記載において「部」は「重量部」を意味する。
(調製例)
・配合物1
SiO1/2単位(Rはメチル基)とSiO単位からなる分岐状ポリオルガノシロキサン(b-1) の100部(固形分)をトルエン100部に分散させたものに、両末端に水酸基を持つ、平均重合度が5000の直鎖状ポリオルガノシロキサン(b-2) 50部を加え、完全に溶解するまで攪拌した後、水酸化ナトリウムを5ppmとなるよう添加した。これを還流温度で6時間加熱攪拌し、縮合反応を行った後、10ppmのリン酸を加えて中和し、反応物を得た。
・配合物2(比較品)
SiO1/2単位(Rはメチル基)とSiO単位からなる分岐状ポリオルガノシロキサン(b-1) の100部(固形分)をトルエン100部に分散させたものに、両末端に水酸基を持つ、平均重合度が5000の直鎖状ポリオルガノシロキサン(b-2) 50部を加え、完全に溶解するまで攪拌し、混合物を得た。
・配合物3(比較品)
配合物1において、(b-2) として両末端に水酸基を持つ、平均重合度が30の直鎖状ポリオルガノシロキサンを用いた以外は同様にして反応物を得た。
・配合物4
配合物1において、(b-2) として両末端に水酸基を持ち、側鎖にビニル基(ビニル基含有量0.1モル%)を持つ平均重合度が5000の直鎖状ポリオルガノシロキサンを用いた以外は同様にして反応物を得た。
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples. In the following description, “parts” means “parts by weight”.
(Preparation example)
・ Formulation 1
100 parts (solid content) of a branched polyorganosiloxane (b-1) composed of R 3 SiO 1/2 units (R is a methyl group) and SiO 2 units are dispersed in 100 parts of toluene. 50 parts of a linear polyorganosiloxane (b-2) having a hydroxyl group and an average degree of polymerization of 5000 was added and stirred until completely dissolved, and then sodium hydroxide was added to 5 ppm. This was heated and stirred at reflux temperature for 6 hours to conduct a condensation reaction, and neutralized by adding 10 ppm of phosphoric acid to obtain a reaction product.
・ Composition 2 (comparative product)
100 parts (solid content) of a branched polyorganosiloxane (b-1) composed of R 3 SiO 1/2 units (R is a methyl group) and SiO 2 units are dispersed in 100 parts of toluene. 50 parts of a linear polyorganosiloxane (b-2) having a hydroxyl group and an average polymerization degree of 5,000 was added and stirred until completely dissolved to obtain a mixture.
・ Composition 3 (comparative product)
A reaction product was obtained in the same manner as in Formulation 1, except that a linear polyorganosiloxane having hydroxyl groups at both ends and having an average polymerization degree of 30 was used as (b-2).
・ Composition 4
In Formulation 1, as (b-2), a linear polyorganosiloxane having a hydroxyl group at both ends and a vinyl group (vinyl group content of 0.1 mol%) in the side chain and an average polymerization degree of 5000 is used. A reaction product was obtained in the same manner except that

実施例1
分子鎖両末端がジメチルビニル基で封鎖された、ジメチルシロキサン・メチルビニルシロキサン共重合体(ビニル基含有量2.0モル%)100部と、分子鎖両末端がトリメチルシリル基で封鎖されたメチルハイドロジェンポリシロキサン3.0部、反応調節剤として3−メチルー1ブチンー3−オール0.2部、配合物1を固形分として5部となる量を加えて均一に混合した。これに白金系触媒として、固形分に対し白金量100ppmとなる量の白金のビニル基含有シロキサン錯体を添加し、均一に混合して付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Example 1
100 parts of a dimethylsiloxane / methylvinylsiloxane copolymer (vinyl group content 2.0 mol%) having both ends of the molecular chain blocked with dimethylvinyl groups, and methylhydro with both ends of the molecular chain blocked with trimethylsilyl groups An amount of 3.0 parts of Genpolysiloxane, 0.2 parts of 3-methyl-1-butyn-3-ol as a reaction regulator, and 5 parts as a solid content was added and mixed uniformly. As a platinum-based catalyst, a platinum-containing siloxane complex of platinum in an amount of 100 ppm of platinum relative to the solid content was added and mixed uniformly to prepare an addition reaction type peelable cured film forming silicone composition. .

実施例2
分子鎖両末端および側鎖に3,4−オキシシクロヘキシルエチル基(含有量10モル%)を持つポリオルガノシロキサン100部に、光反応触媒として、ビス(ドデシルフェニルヨードニウム)ヘキサフルオロアンチモネート0.5部、配合物1を固形分として5部となるように加えて均一に混合し、紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Example 2
100 parts of polyorganosiloxane having 3,4-oxycyclohexylethyl groups (content 10 mol%) at both ends and side chains of the molecular chain, bis (dodecylphenyliodonium) hexafluoroantimonate 0.5% as a photoreaction catalyst Parts of the composition 1 were added to a solid content of 5 parts and mixed uniformly to prepare a UV-curable silicone composition for forming a peelable cured film.

比較例1
配合物1に代えて配合物2を用いる以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Comparative Example 1
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that the formulation 2 was used in place of the formulation 1.

比較例2
配合物1に代えて配合物3を用いる以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Comparative Example 2
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that Formulation 3 was used in place of Formulation 1.

比較例3
実施例1の配合物1を添加しない以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Comparative Example 3
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that the formulation 1 of Example 1 was not added.

これらの組成物から、後記する方法で剥離性被膜を形成し、ハジキ性を評価した。結果を表1に示す。   From these compositions, a peelable film was formed by the method described later, and the repellency was evaluated. The results are shown in Table 1.

実施例3
実施例1の配合物1の添加量を0.5部とする以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Example 3
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that the amount of Formulation 1 in Example 1 was changed to 0.5 part.

実施例4〜7
実施例1の配合物1を配合物4に代え、添加量を0.5〜25部とする以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Examples 4-7
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that Formulation 1 of Example 1 was replaced with Formulation 4 and the addition amount was 0.5 to 25 parts. .

比較例4
実施例1の配合物1を配合物4に代え、添加量を60部とする以外は実施例1と同様にして付加反応型の剥離性硬化皮膜形成用シリコーン組成物を調製した。
Comparative Example 4
An addition reaction type peelable cured film-forming silicone composition was prepared in the same manner as in Example 1 except that the formulation 1 in Example 1 was replaced with the formulation 4 and the addition amount was 60 parts.

これらの組成物から、後記する方法で剥離性被膜を形成し、ハジキ性を評価すると共に、剥離力と残留接着率を測定した。実施例1、比較例3の組成物とあわせて、結果を表2に示す。
(評価方法)
<剥離性被膜の形成>
実施例、比較例に記載の組成物を、基材(ポリエチレンラミネート紙)上に約0.8g/mの塗布量となるように塗布し、付加型の場合は140℃×30秒、紫外線硬化型の場合は紫外線照射装置(Fusion Hバルブ120W、10m/min)を使用して硬化させた。これらを25℃、50%RHで1日保持し、各種の評価用に供した。
<ハジキ性評価>
上記剥離性皮膜に、アクリルエマルジョン系粘着剤としてオリバインBPE−3110H(東洋インキ製造(株)製)を、ウェット厚25μmとなるように塗工し、1分間室温で保持した後、100℃で5分間乾燥し、粘着面の状態を目視観察し、下記4段階で評価した。
◎;ハジキなし、良好
○;ごくわずかにハジキあり
△;わずかにハジキあり
×;著しくハジキあり
<剥離力の測定>
上記剥離性皮膜上に、ニットー502テープ(50mm幅、日東電工(株)製)を貼り付け、20g/cm荷重下で100℃で1時間保持した後荷重を除き、25℃、50%RHで1時間以上保持して、試験片を作製した。次に引張り試験機を用いて、0.3m/分の剥離速度で180°方向にテープの剥がした時の剥離力を測定した。
<残留接着率の測定>
上記剥離性皮膜上に、ニットー31B(25mm幅、日東電工(株)製)を貼り付け、20g/cmの荷重下に70℃で20時間エイジングさせた後、そのテープを剥がし、ステンレス板に貼り付けた。次いで、この処理テープをステンレス板から180°の角度で剥離速度0.3m/分で剥がして剥離に要する力を測定するとともに、標準テープをステンレス板に貼り付け、同様にしてテープの剥離に要する力を測定し、次式より残留接着率を算出した。なお、標準テープとは、ポリエステルテープのニットー31BをPTFEシート(ナフロンPTFEテープ、ニチアス(株)製)に貼り合せ、試験片と同様に20g/cmの荷重下に70℃で20時間エイジングさせたものをいう。
From these compositions, a peelable film was formed by the method described later, and the repellency was evaluated, and the peel force and the residual adhesion rate were measured. The results are shown in Table 2 together with the compositions of Example 1 and Comparative Example 3.
(Evaluation methods)
<Formation of peelable film>
The compositions described in Examples and Comparative Examples were applied on a base material (polyethylene laminated paper) so as to have an application amount of about 0.8 g / m 2. In the case of an addition type, 140 ° C. × 30 seconds, ultraviolet rays In the case of a curing type, curing was performed using an ultraviolet irradiation device (Fusion H bulb 120W, 10 m / min). These were held at 25 ° C. and 50% RH for 1 day and used for various evaluations.
<Evaluation of repellency>
On the peelable film, ORIBAIN BPE-3110H (manufactured by Toyo Ink Mfg. Co., Ltd.) as an acrylic emulsion-based pressure-sensitive adhesive was applied to a wet thickness of 25 μm and held at room temperature for 1 minute. After drying for a minute, the state of the adhesive surface was visually observed and evaluated in the following four stages.
◎: No repellency, good ○: Slight cissing △; Slight cissing ×; Remarkably cissing <Measurement of peel force>
Nitto 502 tape (50 mm width, manufactured by Nitto Denko Co., Ltd.) was applied on the peelable film, held at 100 ° C. for 1 hour under a load of 20 g / cm 2 , and then removed at 25 ° C. and 50% RH. And kept for 1 hour or more to prepare a test piece. Next, using a tensile tester, the peeling force when the tape was peeled in the 180 ° direction at a peeling speed of 0.3 m / min was measured.
<Measurement of residual adhesion rate>
Nitto 31B (25 mm width, manufactured by Nitto Denko Corporation) was pasted on the peelable film, and after aging at 70 ° C. for 20 hours under a load of 20 g / cm 2 , the tape was peeled off and the stainless steel plate was peeled off. Pasted. Next, the treatment tape is peeled off from the stainless steel plate at an angle of 180 ° at a peeling speed of 0.3 m / min to measure the force required for the peeling, and a standard tape is attached to the stainless steel plate, and similarly required for peeling the tape. The force was measured, and the residual adhesion rate was calculated from the following formula. The standard tape is a polyester tape knit 31B bonded to a PTFE sheet (Naflon PTFE tape, manufactured by Nichias Co., Ltd.) and aged at 70 ° C. for 20 hours under a load of 20 g / cm 2 in the same manner as the test piece. Say something.

残留接着率(%)
=(処理テープの剥離に要する力/標準テープの剥離に要する力)×100
Residual adhesion rate (%)
= (Force required for peeling of treated tape / force required for peeling of standard tape) × 100

Figure 2008013613
Figure 2008013613

Figure 2008013613
Figure 2008013613

Claims (2)

付加反応硬化型あるいは紫外線硬化型の剥離性硬化皮膜形成用シリコーン組成物において、
(A) ベースポリマーとなるポリオルガノシロキサン100重量部に対し、
(B) (b-1) ケイ素原子に結合する水酸基を1分子中に少なくとも1個有する分岐状ポリオルガノシロキサンと、(b-2) 末端に水酸基を持つ重合度が100以上の直鎖状ポリオルガノシロキサンとの縮合反応生成物を0.1〜50重量部配合することを特徴とする剥離性硬化皮膜形成用シリコーン組成物。
In the silicone composition for forming a peelable cured film of addition reaction curing type or ultraviolet curing type,
(A) For 100 parts by weight of polyorganosiloxane as a base polymer,
(B) (b-1) a branched polyorganosiloxane having at least one hydroxyl group bonded to a silicon atom in one molecule and (b-2) a linear poly having a hydroxyl group at the terminal and having a degree of polymerization of 100 or more A silicone composition for forming a peelable cured film, comprising 0.1 to 50 parts by weight of a condensation reaction product with an organosiloxane.
請求項1記載の剥離性硬化皮膜形成用シリコーン組成物を塗工した紙、プラスチック類又は金属箔。 A paper, plastics or metal foil coated with the peelable cured film-forming silicone composition according to claim 1.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8933177B2 (en) 2008-07-11 2015-01-13 Dow Corning Toray Company, Ltd. Release modifier and release coating organopolysiloxane composition
US9926410B2 (en) 2013-03-28 2018-03-27 Dow Corning Corporation Organosiloxane compositions and coatings, manufactured articles, methods and uses

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JPS5729676A (en) * 1980-07-29 1982-02-17 Kanze Kk Fixation agent
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JPH06329987A (en) * 1993-05-24 1994-11-29 Shin Etsu Chem Co Ltd Release coating composition
JPH10110156A (en) * 1996-10-08 1998-04-28 Toray Dow Corning Silicone Co Ltd Silicone-based pressure-sensitive adhesive
WO2005063890A2 (en) * 2003-12-23 2005-07-14 Ge Bayer Silicones Gmbh & Co. Kg Curable siloxane composition with modified surface properties

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729676A (en) * 1980-07-29 1982-02-17 Kanze Kk Fixation agent
JPH04272959A (en) * 1991-02-27 1992-09-29 Shin Etsu Chem Co Ltd Releasing silicone composition
JPH06329987A (en) * 1993-05-24 1994-11-29 Shin Etsu Chem Co Ltd Release coating composition
JPH10110156A (en) * 1996-10-08 1998-04-28 Toray Dow Corning Silicone Co Ltd Silicone-based pressure-sensitive adhesive
WO2005063890A2 (en) * 2003-12-23 2005-07-14 Ge Bayer Silicones Gmbh & Co. Kg Curable siloxane composition with modified surface properties

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8933177B2 (en) 2008-07-11 2015-01-13 Dow Corning Toray Company, Ltd. Release modifier and release coating organopolysiloxane composition
US9926410B2 (en) 2013-03-28 2018-03-27 Dow Corning Corporation Organosiloxane compositions and coatings, manufactured articles, methods and uses

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