JPWO2006070947A1 - Solvent-free peelable cured film-forming organopolysiloxane composition - Google Patents

Abstract

[PROBLEMS] Solvent-free organopolysiloxane composition capable of forming a cured film that is easy to handle and has excellent slipperiness of the cured film and excellent releasability from adhesive substances, a sheet-like substrate having the cured film, and a method for producing the same I will provide a. [Solution] (A) Organopolysiloxane having a viscosity of 20 to 300 mPa · s and having at least two silicon-bonded alkenyl groups and at least two silicon-bonded phenyl groups in one molecule, (B) viscosity Having a viscosity of 1 to 1,000 mPa · s, and having at least three silicon-bonded hydrogen atoms in one molecule And (D) a solvent-free peelable cured film-forming organopolysiloxane composition comprising a hydrosilylation reaction catalyst.

Description

  The present invention is easy to handle, forms a cured film on the surface of a substrate, and can provide a good peelability to an adhesive substance and a smooth slipperiness of the surface to be treated. The present invention relates to a formable organopolysiloxane composition, and relates to a sheet-like substrate having a peelable cured film obtained by curing the composition and a method for producing the same.

  A method of imparting releasability to an adhesive substance by forming a cured film of an organopolysiloxane composition on the surface of a substrate such as various papers, laminated papers, synthetic films, and metal foils is well known. In this case, as a method for forming a peelable cured film, an addition reaction type organopolysiloxane in which an organopolysiloxane having an unsaturated hydrocarbon group and an organohydrogenpolysiloxane are subjected to an addition reaction in the presence of a hydrosilylation reaction catalyst. Compositions (see, for example, JP-A-47-32072) have been widely used, and as properties of these peelable cured film-forming organopolysiloxane compositions, these were dissolved in an organic solvent such as toluene. A solvent type, an emulsion type obtained by emulsifying these, and a solventless type consisting only of organopolysiloxane are known. In recent years, from the viewpoint of safety and the environment, a solvent-free peelable cured film-forming organopolysiloxane composition has been demanded for a wide range of applications in place of the solvent type. For example, JP-A-2004-307691 discloses a solvent-free peelable cured film-forming organopolysiloxane composition.

  However, the conventional solvent-free peelable cured film-forming organopolysiloxane composition has a low viscosity of about 50 to 1000 cs, and contains a high-viscosity organopolysiloxane. However, there is a disadvantage that the formed film is poorly slidable and its application is limited. That is, the solventless composition using these low-viscosity organopolysiloxanes as the main agent, when used as a release agent for kraft tape, the formed cured film has poor sliding properties, and the tape is made of cardboard, etc. The sticking work was not performed smoothly, and the pressure-sensitive adhesive was not completely adhered and sometimes peeled off. In addition, even when a cured film is formed on paper, laminated paper, or plastic film, the cured film is not slippery and may damage the tape or cause the tape to rotate smoothly and cause secondary troubles in the process. There was a problem. Furthermore, when a solvent-free organopolysiloxane composition using this type of low-viscosity organopolysiloxane as a main ingredient is applied to paper or a plastic film to form a cured film, a release paper is produced. Due to poor slipping property, the cured film comes into contact with the metal or plastic roll before winding the release paper, resulting in damage to the cured film or releasability when adhesive coating is applied later. There was a problem that the paper or plastic film could not be smoothly wound.

  In JP-A-61-159480, the content of vinyl groups is 0.5 to 10.0 mol% or less and the viscosity at 25 ° C. is 50 to 100, for the purpose of improving the slipperiness of the cured film. A method of adding organopolysiloxane at 000 cps has been proposed. JP-A-61-264052 discloses an organopolysiloxane having a vinyl group content of 0.5 to 10.0% of all organic groups and a viscosity at 25 ° C. of 50 to 10,000 cps; For solvent-free release paper having a viscosity of 50 to 10,000 cs at 25 ° C., which contains a substantially linear organopolysiloxane having a hydroxyl group at the molecular chain end and a viscosity at 25 ° C. of 100,000 cps or more. Silicone compositions have been proposed. However, these compositions require the addition of a large amount of organopolysiloxane having a low vinyl group content, which increases the viscosity of the peelable cured film-forming organopolysiloxane composition and makes it difficult to handle. There was a problem. Furthermore, the slipperiness was not satisfactory.

Japanese Patent Laid-Open No. 47-32072 JP 2004-307691 A Japanese Patent Laid-Open No. 61-159480 JP-A-61-264052

  The present invention has been made to solve the above-mentioned problems, is easy to handle, and has a non-solvent releasable cured film-forming organopolyester that is easy to handle and excellent in the slipperiness of the formed cured film and releasable from adhesive substances. A siloxane composition is provided. Moreover, the sheet-like base material which has a peelable cured film formed by hardening this composition, and its manufacturing method are provided.

（式中、Ｒ^１はそれぞれ独立に炭素原子数１〜８の１価のアルキル基であり、Ｒ^２はＲ^１、炭素原子数２〜８の１価のアルケニル基またはフェニル基からなる群から選択される同一または異種の基、Ｒ^３はフェニル基、Ｒ^４は炭素原子数２〜８のアルケニル基であり、Ｒ^１〜Ｒ^４のうち少なくとも２つ以上はアルケニル基である。ｘは２≦ｘ≦１０であり、ｙは１≦ｙ≦１０であり、ｚは２０≦ｚ≦９７であり、ｘ＋ｙ＋ｚは前記粘度範囲を満足する数である）、
（Ｂ）２５℃における粘度が１００，０００ｍＰａ・ｓ以上であり、ケイ素原子に結合した全ての有機基のうち９０モル％以上が非反応性のアルキル基またはアリール基であるオルガノポリシロキサン： ０．５〜１５重量部
（Ｃ）２５℃における粘度が１〜１，０００ｍＰａ・ｓであり、かつ、１分子中に少なくとも３個のケイ素原子結合水素原子を有し、脂肪族不飽和結合を有しないオルガノハイドロジェンポリシロキサン： ０．５〜３０重量部、および
（Ｄ）ヒドロシリル化反応触媒： 触媒量
からなることを特徴とする無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物および該組成物を硬化させてなる剥離性硬化皮膜を有するシート状基材により前記課題を解決できることを見出し、本発明に到達した。As a result of intensive studies to achieve the above object, the present inventors
(A) Organopoly having a viscosity of 20 to 300 mPa · s at 25 ° C. and having at least two silicon atom-bonded alkenyl groups and at least two silicon atom-bonded phenyl groups in one molecule represented by the following general formula: Siloxane: 100 parts by weight

Wherein R ¹ is independently a monovalent alkyl group having 1 to 8 carbon atoms, and R ² is a group consisting of R ¹ , a monovalent alkenyl group having 2 to 8 carbon atoms or a phenyl group. The same or different groups selected, R ³ is a phenyl group, R ⁴ is an alkenyl group having 2 to 8 carbon atoms, and at least two of R ^{1 to} R ⁴ are alkenyl groups, x is 2 ≦ x ≦ 10, y is 1 ≦ y ≦ 10, z is 20 ≦ z ≦ 97, and x + y + z is a number satisfying the viscosity range).
(B) Organopolysiloxane having a viscosity at 25 ° C. of 100,000 mPa · s or more and 90 mol% or more of all organic groups bonded to silicon atoms being a non-reactive alkyl group or aryl group: 5 to 15 parts by weight (C) The viscosity at 25 ° C. is 1 to 1,000 mPa · s, has at least 3 silicon-bonded hydrogen atoms in one molecule, and does not have an aliphatic unsaturated bond Organohydrogenpolysiloxane: 0.5 to 30 parts by weight, and (D) hydrosilylation reaction catalyst: a solvent-free peelable cured film-forming organopolysiloxane composition characterized by comprising a catalytic amount and the composition The present inventors have found that the above-mentioned problems can be solved by a sheet-like substrate having a peelable cured film obtained by curing the resin.

（式中、Ｒ^１はそれぞれ独立に炭素原子数１〜８の１価のアルキル基であり、Ｒ^２はＲ^１、炭素原子数２〜８の１価のアルケニル基またはフェニル基からなる群から選択される同一または異種の基、Ｒ^３はフェニル基、Ｒ^４は炭素原子数２〜８のアルケニル基であり、Ｒ^１〜Ｒ^４のうち少なくとも２つ以上はアルケニル基である。ｘは２≦ｘ≦１０であり、ｙは１≦ｙ≦１０であり、ｚは２０≦ｚ≦９７であり、ｘ＋ｙ＋ｚは前記粘度範囲を満足する数である）、
（Ｂ）２５℃における粘度が１００，０００ｍＰａ・ｓ以上であり、ケイ素原子に結合した全ての有機基のうち９０モル％以上が非反応性のアルキル基またはアリール基であるオルガノポリシロキサン： ０．５〜１５重量部
（Ｃ）２５℃における粘度が１〜１，０００ｍＰａ・ｓであり、かつ、１分子中に少なくとも３個のケイ素原子結合水素原子を有し、脂肪族不飽和結合を有しないオルガノハイドロジェンポリシロキサン： ０．５〜３０重量部、および
（Ｄ）ヒドロシリル化反応触媒： 触媒量
からなることを特徴とする無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物。
［２］（Ｂ）成分が、２５℃における粘度が１００，０００ｍＰａ・ｓ以上である分子鎖末端がトリメチルシロキシ基，シラノール基またはビニル基からなる群から選択される同一または異種の基で封鎖された直鎖状もしくは分岐状のジメチルポリシロキサンであることを特徴とする、［１］に記載の無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物。
［３］２５℃における組成物全体の粘度が５０〜２，０００ｍＰａ・ｓであることを特徴とする、［１］に記載の無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物。
［４］さらに（Ｅ）ヒドロシリル化反応抑制剤：０．００１〜５重量部からなり、常温で非硬化性であり、加熱硬化性である［１］〜［３］のいずれか１項に記載の無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物。
［５］［１］〜［４］のいずれか１項に記載の剥離性硬化皮膜形成性オルガノポリシロキサン組成物を硬化させてなる剥離性硬化皮膜を有するシート状基材。
［６］基材が、ポリエチレンラミネート紙またはプラスチックフィルムである［５］に記載のシート状基材。
［７］シート状基材上に［１］〜［６］のいずれか１項に記載の剥離性硬化皮膜形成性オルガノポリシロキサン組成物をコーテイングし、加熱して硬化させることを特徴とする剥離性硬化皮膜を有するシート状基材の製造方法。
［８］シート状基材が、ポリエチレンラミネート紙またはプラスチックフィルムである［７］に記載のシート状基材の製造方法。」である。That is, the present invention
“[1] (A) The viscosity at 25 ° C. is 20 to 300 mPa · s, and it has at least two silicon atom-bonded alkenyl groups and at least two silicon atom-bonded phenyl groups in one molecule represented by the following general formula. Organopolysiloxane: 100 parts by weight

Wherein R ¹ is independently a monovalent alkyl group having 1 to 8 carbon atoms, and R ² is a group consisting of R ¹ , a monovalent alkenyl group having 2 to 8 carbon atoms or a phenyl group. The same or different groups selected, R ³ is a phenyl group, R ⁴ is an alkenyl group having 2 to 8 carbon atoms, and at least two of R ^{1 to} R ⁴ are alkenyl groups, x is 2 ≦ x ≦ 10, y is 1 ≦ y ≦ 10, z is 20 ≦ z ≦ 97, and x + y + z is a number satisfying the viscosity range).
(B) Organopolysiloxane having a viscosity at 25 ° C. of 100,000 mPa · s or more and 90 mol% or more of all organic groups bonded to silicon atoms being a non-reactive alkyl group or aryl group: 5 to 15 parts by weight (C) The viscosity at 25 ° C. is 1 to 1,000 mPa · s, has at least 3 silicon-bonded hydrogen atoms in one molecule, and does not have an aliphatic unsaturated bond Organohydrogenpolysiloxane: 0.5-30 parts by weight, and (D) hydrosilylation reaction catalyst: A solvent-free peelable cured film-forming organopolysiloxane composition characterized by comprising a catalytic amount.
[2] The component (B) is blocked with the same or different group selected from the group consisting of trimethylsiloxy group, silanol group or vinyl group at the molecular chain terminal having a viscosity at 25 ° C. of 100,000 mPa · s or more. The solvent-free peelable cured film-forming organopolysiloxane composition according to [1], which is a linear or branched dimethylpolysiloxane.
[3] The solvent-free peelable cured film-forming organopolysiloxane composition according to [1], wherein the viscosity of the entire composition at 25 ° C. is 50 to 2,000 mPa · s.
[4] Furthermore, (E) hydrosilylation reaction inhibitor: 0.001 to 5 parts by weight, non-curable at normal temperature, and heat-curable [1] to [3] Solvent-free peelable cured film-forming organopolysiloxane composition.
[5] A sheet-like substrate having a peelable cured film obtained by curing the peelable cured film-forming organopolysiloxane composition according to any one of [1] to [4].
[6] The sheet-like substrate according to [5], wherein the substrate is polyethylene laminated paper or a plastic film.
[7] Peeling characterized in that the peelable cured film-forming organopolysiloxane composition according to any one of [1] to [6] is coated on a sheet-like substrate, and cured by heating. For producing a sheet-like substrate having a heat-resistant cured film.
[8] The method for producing a sheet-like substrate according to [7], wherein the sheet-like substrate is polyethylene laminated paper or a plastic film. It is.

  According to the present invention, it is possible to provide a solventless releasable cured film-forming organopolysiloxane composition that is easy to handle and excellent in the slipperiness of the formed cured film and the releasability from adhesive substances. Moreover, the sheet-like base material which has a peelable cured film formed by hardening this composition, and its manufacturing method can be provided.

  The component (A) is a main component of the present invention, and since the compatibility with the component (B) that imparts slipperiness to the cured film is low, the component (B) is effective on the surface of the cured film formed by the addition reaction. Can be raised. For this reason, only by adding a small amount of (B) component, the outstanding slip property can be provided to a cured film. The component (A) is an organopolysiloxane having a viscosity of 20 to 300 mPa · s at 25 ° C. and having at least two silicon atom-bonded alkenyl groups and at least two silicon atom-bonded phenyl groups in one molecule. There is something. Hereinafter, the component (A) will be specifically described.

上式中、Ｒ^１はそれぞれ独立に炭素原子数１〜８の１価のアルキル基であり、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、ヘプチル基、オクチル基が例示され、好ましくはメチル基である。Ｒ^２はＲ^１、炭素原子数２〜８の１価のアルケニル基またはフェニル基からなる群から選択される同一または異種の基であり、具体的には前記のＲ^１やビニル基、アリル基、ブテニル基、ペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基などのアルケニル基、またはフェニル基が例示される。Ｒ^３はフェニル基、Ｒ^４は炭素原子数２〜８のアルケニル基であり、Ｒ^１〜Ｒ^４のうち少なくとも２つ以上はアルケニル基である。ｘは２≦ｘ≦１０であり、一分子中に少なくとも２個のケイ素原子結合フェニル基を有する。また、ｙは１≦ｙ≦１０であり、側鎖部分に少なくとも１個のケイ素原子結合アルケニル基を有する。ｚは２０≦ｚ≦９７であり、ｘ＋ｙ＋ｚは前記粘度範囲を満足する数である。ｘが前記上限を超えると（Ｂ）成分との相溶性が著しく悪くなり、組成物全体が白濁しやすくなる。またｙが前記上限を超えると本発明組成物からなる硬化皮膜の被着体との密着性が低下する可能性がある。また、（Ａ）成分の２５℃における粘度は２０〜３００ｍＰａ・ｓであり、より好ましくは、５０〜２５０ｍＰａ・ｓである。（Ａ）成分の粘度が前記上限を超えると、組成物の粘度が高くなりすぎるため塗工性に劣る結果となる。Component (A) has a viscosity at 25 ° C. of 20 to 300 mPa · s, and has at least two silicon atom-bonded alkenyl groups and at least two silicon atom-bonded phenyl groups in one molecule represented by the following general formula. Organopolysiloxane.

In the above formula, each R ¹ is independently a monovalent alkyl group having 1 to 8 carbon atoms, specifically, a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a heptyl group, or an octyl group. Illustratively, a methyl group is preferable. R ² is R ¹ , the same or different group selected from the group consisting of a monovalent alkenyl group having 2 to 8 carbon atoms or a phenyl group, and specifically R ¹ , a vinyl group, or an allyl group. , An alkenyl group such as a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, or a phenyl group. R ³ is a phenyl group, R ⁴ is an alkenyl group having 2 to 8 carbon atoms, and at least two of R ^{1 to} R ⁴ are alkenyl groups. x is 2 ≦ x ≦ 10, and has at least two silicon-bonded phenyl groups in one molecule. Y is 1 ≦ y ≦ 10 and has at least one silicon-bonded alkenyl group in the side chain portion. z is 20 ≦ z ≦ 97, and x + y + z is a number satisfying the viscosity range. When x exceeds the above upper limit, the compatibility with the component (B) is remarkably deteriorated, and the whole composition tends to become cloudy. Moreover, when y exceeds the said upper limit, the adhesiveness with the adherend of the cured film which consists of this invention composition may fall. Moreover, the viscosity in 25 degreeC of (A) component is 20-300 mPa * s, More preferably, it is 50-250 mPa * s. When the viscosity of the component (A) exceeds the above upper limit, the viscosity of the composition becomes too high, resulting in poor coatability.

  The component (B) acts as an additive for providing slipperiness in the composition of the present invention. The component (B) is a diorganopolysiloxane having a viscosity at 25 ° C. of 100,000 mPa · s or more. Examples of the organic group bonded to the silicon atom include alkyl groups such as a methyl group, an ethyl group, and a propyl group; vinyl Examples include alkenyl groups such as a group, allyl group and 5-hexenyl group; aryl groups such as phenyl group; haloalkyl groups such as 3,3,3-trifluoropropyl group and nonafluorohexyl group; and silanol groups. In order to achieve the object of the present invention, it is necessary that 90% or more of the organic group bonded to the silicon atom is a non-reactive alkyl group or aryl group. Component (B) may be in the form of a liquid having a viscosity of 100,000 mPa · s or more or a raw rubber. In the case of a liquid, the viscosity is preferably 1,000,000 mPa · s or more. Further, when the component (B) is in the form of raw rubber, its plasticity (plasticity measured by a plasticity meter according to the method specified in JIS K 6249: 1 kgf on a spherical sample of 4.2 g at 25 ° C. The value when the load is applied for 3 minutes is preferably in the range of 0.5 to 10.0 mm, particularly preferably in the range of 0.9 to 3.0 mm.

  As the component (B), specifically, the molecular chain terminal is blocked with the same or different group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, a haloalkyl group, or a silanol group bonded to a silicon atom. Examples thereof include polydimethylsiloxane, dimethylsiloxane / phenylmethylsiloxane copolymer, and dimethylsiloxane / diphenylsiloxane copolymer. As such component (B), a linear or branched dimethylpolysiloxane whose molecular chain end is blocked with the same or different group selected from the group consisting of trimethylsiloxy group, silanol group or vinyl group is particularly preferred. preferable. A mixture of polydimethylsiloxanes having different degrees of polymerization may be used.

  The solvent-free peelable cured film-forming organopolysiloxane composition of the present invention contains 0.5 to 15 parts by weight of component (B) with respect to 100 parts by weight of component (A). When the content of the component (B) is less than the lower limit, the surface of the cured film is insufficiently slipped. When the content exceeds the upper limit, the viscosity of the organopolysiloxane composition becomes too high, which hinders actual work.

Component (C) is an organohydrogenpolysiloxane having a viscosity at 25 ° C. of 1 to 1,000 mPa · s, having at least three silicon-bonded hydrogen atoms in one molecule, and having no alkenyl group. And functions as the above-mentioned (A) crosslinking agent to form a cured film. Component (C) needs to have at least three silicon-bonded hydrogen atoms in one molecule, and the bonding position is not particularly limited, but the content of silicon-bonded hydrogen atoms is an organopolysiloxane composition. The total amount is preferably 0.1 to 2.0% by weight, and more preferably 0.5 to 1.8% by weight. The amount of hydrogen atoms directly bonded to silicon atoms relative to the amount of alkenyl groups contained in component (A) is preferably in the range of 1.0 to 5.0 in terms of molar ratio. When the molar ratio is less than the lower limit, curability is lowered, and when the upper limit is exceeded, the peel resistance increases and practical peelability cannot be obtained.
Moreover, as an organic group couple | bonded with the silicon atom which (C) component contains other than a hydrogen atom, the alkyl group of a methyl group, an ethyl group, a propyl group, a butyl group, an octyl group is illustrated, and is a methyl group Is preferred. In addition, examples of the molecular structure include straight chain, branched chain, and branched ring. In the case of a straight chain or branched chain, examples of the molecular chain terminal group include a trimethylsiloxy group and a dimethylhydrogensiloxy group.

  (C) The viscosity in 25 degreeC of a component is 1-1000 mPa * s, Preferably it is 5-500 mPa * s. When the viscosity at 25 ° C. is less than 1 mPa · s, the component (C) is easily volatilized from the organopolysiloxane composition, and when it exceeds 1,000 mPa · s, the curing time of the organopolysiloxane composition is This is because it becomes longer. Specific examples of such a component (C) include a trimethylsiloxy group-capped dimethylsiloxane / methylhydrogensiloxane copolymer at both ends, a dimethylhydrogensiloxy group-capped dimethylsiloxane / methylhydrogensiloxane copolymer at both ends, Examples thereof include trimethylsiloxy group-blocked methyl hydrogen polysiloxane, cyclic methyl hydrogen polysiloxane, and cyclic methyl hydrogen siloxane / dimethyl siloxane copolymer.

  The solvent-free peelable cured film-forming organopolysiloxane composition of the present invention contains 0.5 to 30 parts by weight of component (C) with respect to 100 parts by weight of component (A). It is preferable to contain -20 weight part. When the content of the component (C) is less than the lower limit, the curing of the organopolysiloxane composition becomes insufficient, and when the content exceeds the upper limit, the peel resistance of the peelable cured film of the composition of the present invention increases, and further with time. This is because the peeling resistance increases.

Component (D) is a hydrosilylation reaction catalyst, and is a component that crosslinks (A) component and (C) component by addition reaction. Such component (D) is not particularly limited as long as it is a catalyst used in the hydrosilylation reaction. Specifically, chloroplatinic acid, alcohol-modified chloroplatinic acid, olefin complexes of chloroplatinic acid, Complex of chloroplatinic acid and ketones, complex of platinum and alkenylsiloxane, platinum tetrachloride, platinum fine powder, alumina or silica supported on solid platinum, platinum black, platinum olefin complex, platinum A platinum-based catalyst of a thermoplastic organic resin powder such as methyl methacrylate resin, polycarbonate resin, polystyrene resin, and silicone resin containing these platinum-based catalysts; Formula: [Rh (O ₂ CCH ₃ ) ₂ ] ₂ , Rh (O ₂ CCH ₃ ) ₃ , Rh ₂ (C ₈ H ₁₅ O ₂ ) ₄ , Rh (C ₅ H ₇ O ₂ ) ₃ , Rh (C ₅ H ₇ O ₂ ) (CO) ₂ , Rh (CO) [Ph ₃ P] (C ₅ H ₇ O ₂ ), RhX ₃ [(R ⁶ ) ₂ S] ₃ , (R ⁷ ₃ P) ₂ Rh (CO) X, ( R ⁷ ₃ P) ₂ Rh (CO) H, Rh ₂ X ₂ Y ₄ , H _a Rh _b (E) _c Cl _d , or Rh [O (CO) R] ₃ -n (OH) _n Rhodium catalyst (wherein X is a hydrogen atom, chlorine atom, bromine atom, or iodine atom, Y is an alkyl group, CO, C ₈ H ₁₄ , R ⁶ is an alkyl group, a cycloalkyl group, or an aryl group) R ⁷ is an alkyl group, aryl group, alkyloxy group, or aryloxy group, E is an olefin, a is 0 or 1, b is 1 or 2, and c is 1 to 2. An integer of 4, d is 2, 3, or 4 and n is 0 or 1 .); The _{formula: Ir (OOCCH 3) 3,} Ir (C 5 H 7 O 2) 3, represented by _{2 [Ir (Z) (E} ) 2] 2 , or, [Ir (Z) (Dien )] Examples include iridium-based catalysts (wherein Z is a chlorine atom, bromine atom, iodine atom, or alkoxy group, E is an olefin, and Dien is cyclooctadiene). It is preferable to use a chloroplatinic acid, an olefin complex of platinum, a complex of platinum and vinylsiloxane, a complex of chloroplatinic acid and divinyltetramethyldisiloxane, a complex of chloroplatinic acid and tetramethyltetravinylcyclotetrasiloxane, Platinum alkenylsiloxane complexes such as platinum divinyltetramethyldisiloxane complex and platinum tetramethyltetravinylcyclotetrasiloxane complex are particularly preferred. The amount of component (D) added may be a catalytic amount, and is usually the amount of metal contained in component (D) with respect to the total mass of the solvent-free peelable cured film-forming organopolysiloxane composition of the present invention. It is preferably 1 to 1,000 ppm, and more preferably in the range of 5 to 500 ppm.

  In addition to the above components, the peelable cured film-forming organopolysiloxane composition of the present invention suppresses gelation and curing at room temperature, improves storage stability, and is heat curable (E ) It preferably contains a hydrosilylation reaction inhibitor. Examples of the hydrosilylation reaction inhibitor include acetylene compounds, enyne compounds, organic nitrogen compounds, organic phosphorus compounds, and oxime compounds. Specific examples include 3-methyl-1-butyn-3-ol and 3,5-dimethyl. Alkynyl alcohols such as -1-hexyn-3-ol, 3-methyl-1-penten-3-ol, phenylbutynol; 3-methyl-3-penten-1-yne, 3,5-dimethyl-1-hexyne Examples include -3-in, benzotriazole, 1-ethynyl-1-cyclohexanol, and methylvinylcyclosiloxane. The amount of addition reaction inhibitor is usually in the range of 0.001 to 5 parts by weight per 100 parts by weight of component (A), but the type of this component, the performance and content of the hydrosilylation reaction catalyst, and the component It may be selected appropriately according to the amount of alkenyl groups in (A) and the amount of silicon atom-bonded hydrogen atoms in component (C).

  The composition of the present invention comprises the component (A), the component (B), the component (C), the component (D), and optionally the component (E), but reduces the peel strength of the cured film to the adhesive substance. Therefore, an alkenyl group-containing organopolysiloxane resin may be further blended. Further, a thickener such as silica fine powder may be further blended in order to increase the viscosity of the coating solution. Furthermore, known additives such as heat-resistant agents, dyes, and pigments may be further blended so long as the object and effect of the present invention are not impaired. The composition of the present invention preferably has a viscosity of the entire composition at 25 ° C. in the range of 50 to 2,000 mPa · s from the viewpoint of coating properties to the sheet-like substrate.

  The composition of the present invention can be produced by simply uniformly mixing the components (A) to (D), the component (E) and other optional components. The order of addition of each component is not particularly limited, but when not immediately used after mixing, the component (A), the component (B) and the component (C) are mixed with the component (D) separately. It is preferable to store them in a mixture and mix them immediately before use. Moreover, in the composition consisting of the component (A) to the component (D) and the component (E), the amount of the component (E) is adjusted so that it is not crosslinked at room temperature, and is crosslinked and cured when heated. Compositions are also preferred.

  The peelable cured film-forming organopolysiloxane composition of the present invention as described above is applied to paper, corrugated paper, clay coated paper, polyolefin laminated paper, especially polyethylene laminated paper, synthetic resin film, cloth, synthetic fiber, and metal foil. When uniformly coated on the surface of various sheet-like substrates such as component (A) and component (C) under conditions sufficient for hydrosilylation reaction and crosslinking, these sheet-like substrate surfaces It forms a cured film that is excellent in slipperiness and has an appropriate peeling resistance against adhesive substances. In addition, the cured film is characterized by excellent adhesion to the sheet-like substrate.

  The curing temperature of the peelable cured film-forming organopolysiloxane composition of the present invention on a sheet-like substrate is generally appropriately 50 to 200 ° C., but 200 ° if the heat resistance of the sheet-like substrate is good. It may be higher than ℃. The heating method is not particularly limited, and examples include heating in a hot air circulation oven, passing through a long heating furnace, and heat ray radiation using an infrared lamp or a halogen lamp. Moreover, you may make it harden | cure using heating and ultraviolet irradiation together. When the component (D) is a platinum alkenylsiloxane complex catalyst, even if the blending amount is 80 to 200 ppm in terms of platinum metal amount per total amount of the composition, in a short time of 1 to 40 seconds at 100 to 150 ° C. Moreover, it is possible to easily obtain a cured film having excellent adhesion to a sheet-like substrate and excellent releasability from an adhesive substance.

  The sheet-like substrate to which the peelable cured film-forming organopolysiloxane composition of the present invention is applied is preferably polyolefin laminated paper, more preferably polyethylene laminated paper. The polyethylene laminated paper may have a polyethylene surface treated with corona discharge.

  The coater for applying the peelable cured film-forming organopolysiloxane composition of the present invention to the surface of the sheet-like substrate is not particularly limited, and is a roll coater, gravure coater, air coater, curtain flow coater, offset transfer roll. A coater is exemplified. The adhesive substance applied to the peelable sheet formed by applying and curing the peelable cured film-forming organopolysiloxane composition of the present invention on the surface of the sheet-like substrate is various adhesives, various adhesives, etc. Examples include acrylic resin adhesives, rubber adhesives, silicone adhesives; acrylic resin adhesives, synthetic rubber adhesives, silicone adhesives, epoxy resin adhesives, and polyurethane adhesives. Moreover, sticky foods such as asphalt and straw, glue, and bird rice cake are exemplified.

  The composition of the present invention is useful for forming a cured film having excellent surface slipperiness and releasability to adhesive substances, and particularly as a peelable cured film forming agent for process paper, asphalt wrapping paper, and various plastic films. Is preferred. Moreover, the sheet-like substrate having a peelable film obtained by curing the composition of the present invention can be suitably used particularly for process paper, adhesive material wrapping paper, adhesive tape, adhesive label, and the like.

EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not limited to the following Example. In the following examples, all parts are parts by weight, and the viscosity and plasticity are values measured at 25 ° C. Further, the sliding property of the cured film of the solvent-free peelable cured film-forming organopolysiloxane composition and the peelability of the adhesive substance were evaluated by measuring the dynamic friction coefficient and the peel resistance value by the following methods.
[Peeling resistance value]
Solvent-free peelable cured film-forming organopolysiloxane composition is 0.8 g / m ^{2 in} terms of siloxane on the surface of polyethylene laminated paper using a printing tester [manufactured by Akira Seisakusho; RI-2]. After coating, the cured film was formed by heat treatment at 130 ° C. for 30 seconds in a hot air circulating oven. An acrylic solvent-type adhesive [trade name: Orbine BPS-5127, manufactured by Toyo Ink Manufacturing Co., Ltd., product name] was uniformly applied to the cured film surface using an applicator so that the wet thickness became 70 μm, and the temperature was 70 ° C. for 2 minutes. Heat-dried. Next, a pasting paper was pasted on this, a load of 20 g / cm ² was applied, and it was left for 24 hours under conditions of a temperature of 25 ° C. and a humidity of 60%. Thereafter, using a tensile tester, the laminated paper was pulled in the opposite direction under the conditions of an angle of 180 degrees, a peeling speed of 0.3 m / min, or a peeling speed of 100 m / min, and the force (gf) required for peeling was measured. . The sample width was 5 cm when the peeling speed was 0.3 m / min, and 2.5 cm when the peeling speed was 100 m / min.
[Dynamic friction coefficient]
Two cured films were formed under the same conditions as the measurement of the above-described peeling resistance value. These cured films were overlapped so that the cured film surfaces were in contact with each other, and pulled with a high-speed peel tester under the conditions of a load of 200 g and a tensile speed of 5 m / min, and the force (g) required for the tension was measured. Furthermore, the force (g) / 200 (g) required for pulling was calculated as the dynamic friction coefficient of the cured film.
[Example 1]

（Ｂ）可塑度が１．４ｍｍの分子鎖末端がビニル基で封鎖されたジメチルシロキサン生ゴム３．０部、（Ｃ）粘度２５ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％）７．０部、（Ｅ）１−エチル−１−シクロヘキサノール０．３部を均一に混合した。この混合物に、（Ｄ）塩化白金酸・１，３−ジビニル−１，１，３，３−テトラメチルジシロキサン錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、粘度９０ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られたオルガノポリシロキサン組成物を前記の方法で硬化させて得た硬化皮膜の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。
［実施例２］(A) 100 parts of an organopolysiloxane A (viscosity 70 mPa · s) represented by the following average structural formula,

(B) 3.0 parts of dimethylsiloxane raw rubber whose molecular chain end has a plasticity of 1.4 mm and is blocked with a vinyl group, (C) molecular chain both ends trimethylsiloxy group-blocked methylhydrogenpolysiloxane having a viscosity of 25 mPa · s ( 7.0 parts of silicon-bonded hydrogen atom content (1.6% by weight) and (E) 0.3 part of 1-ethyl-1-cyclohexanol were uniformly mixed. In this mixture, (D) chloroplatinic acid • 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) is added in an amount such that the platinum metal amount becomes 100 ppm. Addition and blending was performed to obtain a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 90 mPa · s. The dynamic friction coefficient and peel resistance value of the cured film obtained by curing the obtained organopolysiloxane composition by the above-mentioned method were measured, and the results are shown in Table 1.
[Example 2]

（Ｂ）可塑度が１．４ｍｍの分子鎖末端がビニル基で封鎖されたジメチルシロキサン生ゴム３．０部、（Ｃ）粘度２５ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％）１１．０部、（Ｅ）１−エチル−１−シクロヘキサノール０．３部を均一に混合した。この混合物に、（Ｄ）塩化白金酸・１，３−ジビニル−１，１，３，３−テトラメチルジシロキサン錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、粘度９０ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られた組成物の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。
［実施例３］(A) 100 parts of an organopolysiloxane B (viscosity 70 mPa · s) represented by the following average structural formula,

(B) 3.0 parts of dimethylsiloxane raw rubber whose molecular chain end has a plasticity of 1.4 mm and is blocked with a vinyl group, (C) molecular chain both ends trimethylsiloxy group-blocked methylhydrogenpolysiloxane having a viscosity of 25 mPa · s ( 11.0 parts of silicon atom-bonded hydrogen atom content (1.6% by weight) and (E) 0.3 part of 1-ethyl-1-cyclohexanol were uniformly mixed. In this mixture, (D) chloroplatinic acid • 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) is added in an amount such that the platinum metal amount becomes 100 ppm. Addition and blending was performed to obtain a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 90 mPa · s. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Example 3]

（Ｂ）可塑度が１．４ｍｍの分子鎖末端がビニル基で封鎖されたジメチルシロキサン生ゴム３．０部、（Ｃ）粘度２５ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％）１２．０部、（Ｅ）１−エチル−１−シクロヘキサノール０．３部を均一に混合した。この混合物に、（Ｄ）塩化白金酸とジビニルテトラメチルジシロキサンの錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、粘度２００ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られた組成物の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。
［実施例４］(A) 100 parts of an organopolysiloxane C (viscosity 190 mPa · s) represented by the following average structural formula,

(B) 3.0 parts of dimethylsiloxane raw rubber whose molecular chain end has a plasticity of 1.4 mm and is blocked with a vinyl group, (C) molecular chain both ends trimethylsiloxy group-blocked methylhydrogenpolysiloxane having a viscosity of 25 mPa · s ( 12.0 parts of silicon atom-bonded hydrogen atom content (1.6% by weight) and (E) 0.3 part of 1-ethyl-1-cyclohexanol were uniformly mixed. To this mixture, (D) a complex of chloroplatinic acid and divinyltetramethyldisiloxane (platinum metal content 0.6% by weight) was added and blended so that the amount of platinum metal was 100 ppm, and a solvent-free solvent having a viscosity of 200 mPa · s. A mold-peelable cured film-forming organopolysiloxane composition was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Example 4]

(A) 100 parts of the above-mentioned organopolysiloxane A (viscosity 70 mPa · s), (B) 6.0 parts of dimethylsiloxane raw rubber whose molecular chain end having a plasticity of 1.4 mm is blocked with a vinyl group, and (C) viscosity 25 mPa · s molecular chain both ends trimethylsiloxy group-blocked methylhydrogenpolysiloxane (silicon atom-bonded hydrogen atom content 1.6 wt%) 7.0 parts, (E) 1-ethyl-1-cyclohexanol 0.3 The parts were mixed uniformly. In this mixture, (D) chloroplatinic acid • 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) is added in an amount such that the platinum metal amount becomes 100 ppm. Addition and blending was performed to obtain a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 90 mPa · s. The dynamic friction coefficient and peel resistance value of the cured film obtained by curing the obtained organopolysiloxane composition by the above-mentioned method were measured, and the results are shown in Table 1.
[Example 5]

(A) 100 parts of the above-mentioned organopolysiloxane A (viscosity 70 mPa · s), (B) 6.0 parts of dimethylsiloxane having a viscosity of 1,000,000 mPa · s and a molecular chain end blocked with a trimethylsiloxy group, C) Molecular hydrogen both ends trimethylsiloxy group-blocked methyl hydrogen polysiloxane having a viscosity of 25 mPa · s (silicon atom-bonded hydrogen atom content 1.6 wt%) 7.0 parts, (E) 1-ethyl-1-cyclohexanol 0.3 part was mixed uniformly. In this mixture, (D) chloroplatinic acid • 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) is added in an amount such that the platinum metal amount becomes 100 ppm. An additive-blended organopolysiloxane composition having a viscosity of 120 mPa · s and having a viscosity of 120 mPa · s was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Comparative Example 1]

可塑度が１．４ｍｍの分子鎖末端がビニル基で封鎖されたジメチルシロキサン生ゴム ３．０部、粘度２５ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％） ４．７部、１−エチル−１−シクロヘキサノール ０．３部を均一に混合した。この混合物に、塩化白金酸・１，３−ジビニル−１，１，３，３−テトラメチルジシロキサン錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、粘度１３０ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られた組成物の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。
［比較例２］100 parts of an organopolysiloxane represented by the following average structural formula (viscosity: 100 mPa · s),

3.0 parts of dimethylsiloxane raw rubber whose molecular chain end is blocked with a vinyl group having a plasticity of 1.4 mm, and trimethylsiloxy group-blocked methylhydrogenpolysiloxane having a viscosity of 25 mPa · s (containing silicon-bonded hydrogen atoms) (Amount 1.6 wt%) 4.7 parts and 0.3 part of 1-ethyl-1-cyclohexanol were mixed uniformly. To this mixture, chloroplatinic acid / 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) was added and added so that the amount of platinum metal was 100 ppm. Thus, a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 130 mPa · s was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Comparative Example 2]

可塑度が１．４ｍｍの分子鎖末端がビニル基で封鎖されたジメチルシロキサン生ゴム ３．０部、粘度２５ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％） ７．０部、１−エチル−１−シクロヘキサノール ０．３部を均一に混合した。この混合物に、塩化白金酸・１，３−ジビニル−１，１，３，３−テトラメチルジシロキサン錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、粘度９０ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られた組成物の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。
［比較例３］100 parts of an organopolysiloxane represented by the following average structural formula (viscosity: 70 mPa · s),

3.0 parts of dimethylsiloxane raw rubber whose molecular chain end is blocked with a vinyl group having a plasticity of 1.4 mm, and trimethylsiloxy group-blocked methylhydrogenpolysiloxane having a viscosity of 25 mPa · s (containing silicon-bonded hydrogen atoms) (Amount 1.6 wt%) 7.0 parts and 0.3 part of 1-ethyl-1-cyclohexanol were mixed uniformly. To this mixture, chloroplatinic acid / 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) was added and added so that the amount of platinum metal was 100 ppm. Thus, a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 90 mPa · s was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Comparative Example 3]

In Example 1, a solvent-free peelable cured film having a viscosity of 65 mPa · s was formed in the same manner as in Example 1 except that 3.0 parts of dimethylsiloxane raw rubber whose molecular chain ends were blocked with vinyl groups was not blended. An organopolysiloxane composition was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Comparative Example 4]

Example 1 is the same as Example 1 except that 3.0 parts of dimethylpolysiloxane having a viscosity of 1,000 mPa · s is blended in place of 3.0 parts of dimethylsiloxane raw rubber whose molecular chain ends are blocked with vinyl groups. Thus, a solvent-free peelable cured film-forming organopolysiloxane composition having a viscosity of 70 mPa · s was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.
[Comparative Example 5]

分子鎖末端がジメチルビニルシロキシ基およびトリメチルシロキシ基で封鎖され、ジフェニルシロキサン単位を５モル％含有するメチルフェニルポリシロキサン（粘度３，０００ｍＰａ・ｓ） １．８部、（Ｃ）粘度２０ｍＰａ・ｓの分子鎖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（ケイ素原子結合水素原子含有量１．６重量％） ２．０部、（Ｅ）１−エチル−１−シクロヘキサノール ０．３部を均一に混合した。この混合物に、（Ｄ）塩化白金酸・１，３−ジビニル−１，１，３，３−テトラメチルジシロキサン錯体（白金金属含有率０．６重量％）を白金金属量が１００ｐｐｍとなる量添加配合して、２５℃における粘度４００ｍＰａ・ｓの無溶剤型剥離性硬化皮膜形成性オルガノポリシロキサン組成物を得た。得られた組成物の動摩擦係数、剥離抵抗値を測定し、それらの結果を表１に示した。100 parts of dimethylpolysiloxane blocked with dimethylvinylsiloxy groups at both ends of the molecular chain represented by the following average structural formula (viscosity 400 mPa · s),

The molecular chain end is blocked with a dimethylvinylsiloxy group and a trimethylsiloxy group, and 1.8 parts of methylphenylpolysiloxane (viscosity 3,000 mPa · s) containing 5 mol% of diphenylsiloxane units, and (C) a viscosity of 20 mPa · s. Molecular chain both ends trimethylsiloxy group-blocked methyl hydrogen polysiloxane (silicon atom-bonded hydrogen atom content 1.6 wt%) 2.0 parts, (E) 1-ethyl-1-cyclohexanol 0.3 parts uniformly Mixed. In this mixture, (D) chloroplatinic acid • 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex (platinum metal content 0.6% by weight) is added in an amount such that the platinum metal amount becomes 100 ppm. An additive-blended organopolysiloxane composition having a viscosity of 400 mPa · s at 25 ° C. and having a viscosity of 400 mPa · s was obtained. The dynamic friction coefficient and peel resistance value of the obtained composition were measured, and the results are shown in Table 1.

Claims (8)

(A) Organopoly having a viscosity of 20 to 300 mPa · s at 25 ° C. and having at least two silicon atom-bonded alkenyl groups and at least two silicon atom-bonded phenyl groups in one molecule represented by the following general formula: Siloxane: 100 parts by weight

Wherein R ¹ is independently a monovalent alkyl group having 1 to 8 carbon atoms, and R ² is a group consisting of R ¹ , a monovalent alkenyl group having 2 to 8 carbon atoms or a phenyl group. The same or different groups selected, R ³ is a phenyl group, R ⁴ is an alkenyl group having 2 to 8 carbon atoms, and at least two of R ^{1 to} R ⁴ are alkenyl groups, x is 2 ≦ x ≦ 10, y is 1 ≦ y ≦ 10, z is 20 ≦ z ≦ 97, and x + y + z is a number satisfying the viscosity range).
(B) Organopolysiloxane having a viscosity at 25 ° C. of 100,000 mPa · s or more and 90 mol% or more of all organic groups bonded to silicon atoms being a non-reactive alkyl group or aryl group: 5 to 15 parts by weight (C) The viscosity at 25 ° C. is 1 to 1,000 mPa · s, has at least 3 silicon-bonded hydrogen atoms in one molecule, and does not have an aliphatic unsaturated bond Organohydrogenpolysiloxane: 0.5-30 parts by weight, and (D) hydrosilylation reaction catalyst: A solvent-free peelable cured film-forming organopolysiloxane composition characterized by comprising a catalytic amount.   (B) A linear chain in which the end of the molecular chain having a viscosity at 25 ° C. of 100,000 mPa · s or more is blocked with the same or different group selected from the group consisting of a trimethylsiloxy group, a silanol group or a vinyl group The solvent-free peelable cured film-forming organopolysiloxane composition according to claim 1, wherein the composition is a dimethylpolysiloxane in the form of a branch or a branch.   The solvent-free peelable cured film-forming organopolysiloxane composition according to claim 1, wherein the viscosity of the entire composition at 25 ° C is 50 to 2,000 mPa · s.   Furthermore, (E) Hydrosilylation reaction inhibitor: It consists of 0.001-5 weight part, is non-hardening at normal temperature, and is heat-hardening, The solvent-free of any one of Claims 1-3 Mold-peelable cured film-forming organopolysiloxane composition.   The sheet-like base material which has a peelable cured film formed by hardening | curing the peelable cured film forming organopolysiloxane composition of any one of Claims 1-4.   The sheet-like substrate according to claim 5, wherein the substrate is polyethylene laminated paper or a plastic film.   A peelable cured film characterized by coating the peelable cured film-forming organopolysiloxane composition according to any one of claims 1 to 6 on a sheet-like substrate, and curing it by heating. The manufacturing method of the sheet-like base material which has this.   The method for producing a sheet-like substrate according to claim 7, wherein the sheet-like substrate is polyethylene laminated paper or a plastic film.