JP6356042B2 - Polysiloxane group-containing polymer and thermosetting film - Google Patents

Description

  The present invention relates to a polysiloxane group-containing polymer obtained by homopolymerizing or copolymerizing a novel reactive polysiloxane compound, and a thermosetting coating obtained by reacting the polymer with a crosslinking agent. More specifically, the present invention can be used for paints and coating agents, and a film formed using the coating has functions such as water repellency, oil repellency, releasability, transferability, substrate adhesion and stain resistance. In addition, since the polymer can use carbon dioxide as a raw material for its synthesis, it is possible to provide a polysiloxane group-containing polymer that can provide an excellent product in terms of dealing with environmental problems in recent years. It relates to coalescence and thermosetting coating.

  Polysiloxane resins have a siloxane bond, which is an inorganic structure, in the main skeleton, and have excellent functionality such as water repellency, heat resistance, surface slipperiness, mold release, insulation, etc. It is used as a forming component or as an additive such as a modifier. The polysiloxane compound used for such a use is an oligomer having a linear chemical structure, and is usually an oily and inactive substance. For this reason, when using it as a material for coating materials, it is necessary to introduce an organic functional group having reactivity into the polysiloxane compound. For this reason, various reactive silicone oils modified with reactive organic functional groups such as a hydroxyl group, an epoxy group, an amino group, and an unsaturated group are on the market.

  Further, in order to impart water repellency and releasability as the surface characteristics of the resin or coating film, it is necessary to have a chemical structure in which the siloxane chain is easily oriented on the surface. On the other hand, since the siloxane chain is hydrophobic, it usually has a feature that it easily moves to the interface with air. However, since the movement of the polymer is limited, it is preferable to use a compound having an organic functional group at one end of the molecule. That is, the polymer material obtained from such a compound is advantageous for surface orientation because the siloxane chain is grafted.

  Among the various organic functional groups listed above, the unsaturated bond can be polymerized alone, so that it is easy to produce a graft polymer and has a wide range of applications. For example, Patent Document 1 has devised a paint having scratch resistance, and Patent Document 2 has devised use as a temperature-sensitive adhesive sheet. However, the polysiloxane compound containing an unsaturated group used in these documents does not have a polar group in the chemical structure, so that it is hydrophobic when copolymerized with a component having another unsaturated group. Strong siloxane segments cause phase separation. As a result, when a coating film or the like is formed, the surface performance is not uniform, or a part of the siloxane component remains unreacted. In particular, in the case of a resin synthesized as a resin for paint, it is often copolymerized with a component having a hydroxyl group, such as 2-hydroxyethyl acrylate, for the purpose of achieving adhesion and crosslinking performance. The siloxane component is easily separated. On the other hand, when the siloxane component remains unreacted or in an oligomer state, these components bleed to the surface, resulting in a decrease in oil repellency, or a problem that these components migrate from the contact surface to the base material. It can be caused.

  On the other hand, for the purpose of improving compatibility, adhesion, and mechanical strength, a method of converting to urethane acrylate by introducing a terminal unsaturated group through a urethane bond which is a polar group has been devised. For example, Patent Literature 3 devises a method using a diisocyanate compound and an acrylate compound having a hydroxyl group, and a method using a compound having both a methacryl group and an isocyanate group. However, according to the study by the present inventors, introduction of urethane bonds by these methods is effective in improving mechanical strength, but is not sufficient in terms of improving hydrophobicity. For improving hydrophobicity, It is considered necessary to introduce a chemical structure that is more polar than the urethane bond.

  On the other hand, apart from the technique described above, in recent years, a method using a reaction of a 5-membered cyclic carbonate compound and an amine compound has been devised as a urethane bond formation reaction, unlike the conventional method using an isocyanate compound and a polyol. (Patent Document 4). Unlike the urethane bond obtained by the conventional reaction, the urethane bond obtained by this method has a hydroxyl group at the γ-position of the carbonyl, so it is particularly called a hydroxyurethane structure, and is more hydrophilic than the conventional urethane bond. Furthermore, since the above reaction can use carbon dioxide as one of raw materials in the production of a five-membered cyclic carbonate compound, it should be noted as a method for producing a material that addresses environmental problems. But there is. Further, according to the study by the present inventors, the above reaction can be expected to be used in various ways as a method for producing a compound having a hydroxyl group simultaneously with a urethane bond.

JP 2007-2260 A JP 2009-120743 A Japanese Patent Laid-Open No. 3-181509 US Pat. No. 3,072,613

  Accordingly, an object of the present invention is to eliminate the drawbacks of the prior art, and the coating film or film formed is excellent in water repellency, oil repellency, releasability, transferability, substrate adhesion and stain resistance. Another object is to provide a polysiloxane group-containing polymer that can be used as a material for a coating agent and a cured film thereof. In particular, the object of the present invention is to reduce the disadvantages such as transferability while being excellent in surface properties as compared with conventional compounds, and a new polysiloxane group-containing polymer that contributes to reduction of environmental burden and It is to provide the cured coating.

［一般式（１）中、ｍは０〜３００のいずれかの整数であり、Ｘ₁は、水酸基とウレタン結合を有する下記式（２）〜（５）から選ばれるいずれかのヒドロキシウレタン結合であり、Ｚは、ないか、−ＣＨ₂−Ｏ−、−Ｏ−、−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）、−ＣＯ−Ｏ−、−ＣＯ−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）から選ばれるいずれかである。また、Ｒ₁及びＲ₂は、それぞれＣＨ₃又はＨであり、同一であっても異なっていてもよく、Ｒ₃は、ＣＨ₃又は式（６）の基であり、同一であっても異なっていてもよい。また、Ｙ₁は、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造を含んでいてもよい、炭素数１〜３０の、アルキレン基又はアリーレン基又は繰り返し単位１〜３００のポリエチレングリコール鎖である。Ｗは、炭素数１〜３０のアルコキシ基、或いは、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造を含んでいてもよい、炭素数１〜３０のアルキル基又はアリール基である。］ The above problems are solved by the present invention. That is, the present invention relates to a reactive polysiloxane compound having an ethylenically unsaturated group at one end via a hydroxyurethane bond represented by the following general formula (1), either homopolymerized or co-polymerized with other polymerizable monomers. Provided is a polysiloxane group-containing polymer which is a polymer or copolymer obtained by polymerization and has a weight average molecular weight of 10,000 to 1,000,000.

[In General Formula (1), m is an integer of 0 to 300, and X ₁ is a hydroxyurethane bond selected from the following formulas (2) to (5) having a hydroxyl group and a urethane bond. Yes, Z is absent, —CH ₂ —O—, —O—, —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10), —CO—O—, —CO —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10). R ₁ and R ₂ are each CH ₃ or H, and may be the same or different, and R ₃ is CH ₃ or a group of the formula (6), and may be the same or different. It may be. Y ₁ may contain any of O, S or N or a cyclic structure in the structure, and the alkylene group or arylene group or polyethylene having 1 to 300 repeating units having 1 to 30 carbon atoms. Glycol chain. W is an alkoxy group having 1 to 30 carbon atoms, or an alkyl group or aryl group having 1 to 30 carbon atoms, which may contain any element of O, S or N or a cyclic structure in the structure. is there. ]

［式（２）中、Ｒ₄は、Ｈ又はＣＨ₃である。］

［式（３）中、Ｒ₄は、Ｈ又はＣＨ₃である。］

［式（６）中、ｍは０〜３００のいずれかの整数であり、Ｗは、炭素数１〜３０のアルコキシ基、或いは、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造を含んでいてもよい、炭素数１〜３０の、アルキル基又はアリール基である。］

[In the formula (2), R ₄ is H or CH ₃ . ]

[In the formula (3), R ₄ is H or CH ₃ . ]

[In Formula (6), m is any integer of 0 to 300, and W is an alkoxy group having 1 to 30 carbon atoms, or any element of O, S, or N in the structure, or cyclic It is a C1-C30 alkyl group or aryl group which may contain a structure. ]

Preferred embodiments of the present invention include the following configurations.
The polysiloxane group containing polymer whose content of the polysiloxane segment component in the said polymer or copolymer is 0.1-20 mass%. The polysiloxane group-containing polymer, wherein the other polymerizable monomer for forming the copolymer is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic ester and methacrylic ester .

  The reactive polysiloxane compound includes a polysiloxane compound having an amino group at one end and a compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure having an ethylenically unsaturated group at one end. A polysiloxane group-containing polymer obtained by reaction.

［一般式（７）及び（８）中の、Ｒ₁、Ｒ₂及びＺは、前記一般式（１）中におけるこれらの記号と同義であり、一般式（７）中のＲ₄は、Ｈ又はＣＨ₃である。］ The compound having both the ethylenically unsaturated group and the 5-membered cyclic carbonate structure has the following general formula (7) having one ethylenically unsaturated group and one 5-membered cyclic carbonate structure: Or the polysiloxane group containing polymer which is a compound shown by General formula (8).

[R ₁ , R ₂ and Z in the general formulas (7) and (8) have the same meanings as those symbols in the general formula (1), and R ₄ in the general formula (7) is H Or CH ₃ . ]

［上記式中の、Ｙ₁、Ｒ₃、Ｗ及びｍは、前記一般式（１）中におけるこれらの記号と同義である。］ The polysiloxane group-containing polymer, wherein the polysiloxane compound having an amino group at one end is a compound represented by the following formula.

[Y ₁ , R ₃ , W and m in the above formula have the same meanings as those symbols in the general formula (1). ]

  A polysiloxane group-containing polymer in which the 5-membered cyclic carbonate structure is synthesized from an epoxy group and carbon dioxide. A polysiloxane group-containing polymer in which 0.1 to 20% by mass of the total mass of the polymer or copolymer is composed of carbon dioxide-derived —O—CO— bonds.

  Moreover, this invention provides the thermosetting film characterized by making a crosslinking agent react with one of the above-mentioned polysiloxane group containing polymers as another embodiment. As a preferable form, the cross-linking agent is a polyisocyanate.

  According to the present invention, a novel reactive polysiloxane compound to which a hydroxyurethane synthesis technique is applied is a novel polymer or copolymer that is used as a monomer component for homopolymerization or copolymerization with other polymerizable monomers (hereinafter referred to as “polymeric copolymer”). A polysiloxane group-containing polymer (sometimes simply referred to as a polymer). More specifically, the polysiloxane group-containing polymer of the present invention uses a new reactive polysiloxane compound as a monomer component, thereby introducing a hydroxyurethane structure, which has a chemical structure different from conventional compounds, into the polymer. Since the polysiloxane chain is randomly copolymerized and has a chemical structure having a hydroxyl group at the root of the polysiloxane chain, the siloxane chain tends to cause surface orientation, and thermal crosslinking with a crosslinking agent such as polyisocyanate is also possible. The formed thermosetting film is easy and becomes a film (coating film) excellent in functionality having water repellency, oil repellency, releasability, transferability, substrate adhesion and stain resistance. In addition, the polysiloxane group-containing polymer provided by the present invention is a compound that can use carbon dioxide as a raw material (formation material), and in this respect, it can also contribute to a reduction in environmental burden.

4 is an IR chart of the 5-membered cyclic carbonate compound C-1 synthesized in Synthesis Example 1. 4 is an IR chart of a polysiloxane compound HS-1 having an ethylenically unsaturated group at one end through a hydroxyurethane bond synthesized in Synthesis Example 1. 2 is an IR chart of the polysiloxane group-containing polymer-1 of Example 1. FIG.

  Next, the present invention will be described in detail with reference to preferred embodiments for carrying out the invention. The polysiloxane group-containing polymer of the present invention is a homopolymerization of a reactive polysiloxane compound represented by the following general formula (1), having an ethylenically unsaturated group at one end via a hydroxyurethane bond, or It is a polymer or copolymer obtained by copolymerizing with other polymerizable monomers such as acrylic monomers, and has a weight average molecular weight of 10,000 to 1,000,000. Hereinafter, the compound represented by the general formula (1) may be simply referred to as “reactive polysiloxane compound”.

［一般式（１）中、ｍは０〜３００のいずれかの整数であり、Ｘ₁は、水酸基とウレタン結合を有する下記式（２）〜（５）から選ばれるいずれかのヒドロキシウレタン結合であり、Ｚは、ないか、−ＣＨ₂−Ｏ−、−Ｏ−、−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）、−ＣＯ−Ｏ−、−ＣＯ−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）から選ばれるいずれかである。また、Ｒ₁及びＲ₂は、それぞれＣＨ₃又はＨであり、同一であっても異なっていてもよく、Ｒ₃は、ＣＨ₃又は式（６）の基であり、同一であっても異なっていてもよい。また、Ｙ₁は、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造（例えば、フェニレン基、シクロヘキシレン基など）を含んでいてもよい、炭素数１〜３０の、アルキレン基又はアリーレン基又は繰り返し単位１〜３００のポリエチレングリコール鎖である。Ｗは、炭素数１〜３０のアルコキシ基、或いは、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造（例えば、フェニル基、シクロヘキシル基など）を含んでいてもよい、炭素数１〜３０のアルキル基又はアリール基である。］

[In General Formula (1), m is an integer of 0 to 300, and X ₁ is a hydroxyurethane bond selected from the following formulas (2) to (5) having a hydroxyl group and a urethane bond. Yes, Z is absent, —CH ₂ —O—, —O—, —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10), —CO—O—, —CO —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10). R ₁ and R ₂ are each CH ₃ or H, and may be the same or different, and R ₃ is CH ₃ or a group of the formula (6), and may be the same or different. It may be. Y ₁ is an alkylene group having 1 to 30 carbon atoms, which may contain any element of O, S or N or a cyclic structure (eg, phenylene group, cyclohexylene group, etc.) in the structure. Or an arylene group or a polyethylene glycol chain of 1 to 300 repeating units. W is an alkoxy group having 1 to 30 carbon atoms, or may contain any element of O, S or N or a cyclic structure (for example, phenyl group, cyclohexyl group, etc.) in the structure. 1-30 alkyl groups or aryl groups. ]

［式（２）中、Ｒ₄は、Ｈ又はＣＨ₃である。］

［式（３）中、Ｒ₄は、Ｈ又はＣＨ₃である。］

［式（６）中、ｍは０〜３００のいずれかの整数であり、Ｗは、炭素数１〜３０のアルコキシ基、或いは、構造中に、Ｏ、Ｓ又はＮのいずれかの元素或いは環状構造（例えば、フェニル基、シクロヘキシル基など）を含んでいてもよい、炭素数１〜３０の、アルキル基又はアリール基である。］

[In the formula (2), R ₄ is H or CH ₃ . ]

[In the formula (3), R ₄ is H or CH ₃ . ]

[In Formula (6), m is any integer of 0 to 300, and W is an alkoxy group having 1 to 30 carbon atoms, or any element of O, S, or N in the structure, or cyclic It is a C1-C30 alkyl group or aryl group which may contain a structure (for example, a phenyl group, a cyclohexyl group, etc.). ]

  The polysiloxane group-containing polymer of the present invention is characterized by a polymer or copolymer obtained by using the above-mentioned reactive polysiloxane compound as a polymerizable monomer and homopolymerizing or copolymerizing it with other polymerizable monomers. There is to be. The reactive polysiloxane compound characterizing the present invention has a reactive (polymerizable) ethylenically unsaturated group at its terminal, and the ethylenically unsaturated group has a specific structure having a hydroxyl group and a urethane bond. It is characterized by being bonded to a polysiloxane structure through one hydroxyurethane bond, and can be obtained by, for example, the following method. That is, the reactive polysiloxane compound having the above structure includes both a polysiloxane compound having an amino group at one end and an ethylenically unsaturated group and a 5-membered cyclic carbonate structure having an ethylenically unsaturated group at one end. It can obtain by forming the hydroxy urethane bond of the structure chosen from said Formula (2)-(5) by making it react with the compound which has. In addition, since the 5-membered cyclic carbonate structure of the compound used in the above reaction can be synthesized from an epoxy group and carbon dioxide, the reactive polysiloxane compound of the present invention has an environmental load in the structure of the compound. It is possible to fix carbon dioxide that can contribute to reduction. Hereinafter, the above points will be described in detail.

[Reactive polysiloxane compound]
The reactive polysiloxane compound characterizing the present invention represented by the general formula (1) will be described. The chemical structure represented by X ₁ , which characterizes this compound, that is, the hydroxyurethane bond having a hydroxyl group and a urethane bond as represented by the general formulas (2) to (5), is as described below. It can be formed by an addition reaction between a cyclic carbonate compound and an amine compound. In the reaction between a 5-membered cyclic carbonate compound and an amine compound, as shown below, since there are two types of cleavage of the 5-membered cyclic carbonate group, it is known that products having two types of structures can be obtained. Yes. The chemical structure obtained by this addition reaction is a urethane bond, but has a unique structure having a hydroxyl group, and is particularly distinguished from a normal urethane bond and is called a hydroxyurethane bond (or hydroxyurethane structure). Is. In the present specification, this is called a hydroxyurethane bond.

  Conventionally, a compound in which an unsaturated group is introduced into a polysiloxane compound via a urethane bond has been reported as a urethane acrylate compound, for example. Advantages of the urethane acrylate compound containing a urethane bond include improvements in mechanical strength, adhesion, compatibility, etc., and the compound represented by the general formula (1) characterizing the polymer of the present invention is also It can be said that it is a group of such compounds. However, the reactive polysiloxane compound represented by the general formula (1) is greatly different in that it has the above-described hydroxyurethane bond different from the conventional urethane bond. The reason why the hydroxyurethane bond is distinguished from the normal urethane bond is that it has a hydroxyl group in its structure as described above. On the other hand, such a chemical structure cannot be obtained by a conventional synthesis method in which a urethane bond is formed by reacting a hydroxyl group with an isocyanate group. The hydroxyurethane bond present in the reactive polysiloxane compound that characterizes the present invention introduces this unique bond into the structure of the compound, so that the compound improves mechanical strength in the same manner as conventional urethane bonds. At the same time as having an effect, the hydrophilicity can be sufficiently improved by the effect of a hydroxyl group that has not existed in conventional compounds. For this reason, the polymer obtained by using the compound as a polymerizable monomer is applied to raw materials such as paints and coating materials, for example, to improve compatibility with other materials and to form a coating film, etc. This can contribute to the improvement of the adhesion to the substrate. In particular, since a normal polysiloxane compound is a highly hydrophobic compound, it is possible to improve the hydrophilicity by the effect of the hydroxyl group. The modification effect by the urethane bond is more effectively exhibited.

The reactive polysiloxane compound represented by the general formula (1) used as a polymerizable monomer when forming the polymer of the present invention is synthesized by utilizing a reaction between a 5-membered cyclic carbonate compound and an amine compound. can do. And from a viewpoint of reduction of an environmental load, it is preferable that the 5-membered cyclic carbonate compound used here is what was synthesize | combined by reaction of an epoxy compound and a carbon dioxide. The reaction at that time will be described later. That is, the 5-membered cyclic carbonate compound synthesized using carbon dioxide in this way is used as a raw material, and the polysiloxane compound obtained has X ₁ in the general formula (1). The —O—CO— bond of the chemical structure selected from the formulas (2) to (5) is derived from carbon dioxide as a raw material. As a result, the reactive polysiloxane compound that characterizes the present invention having one hydroxyurethane bond is obtained by fixing a large amount of carbon dioxide in its structure. The product to which the polymer of the present invention is applied is worthy of dealing with environmental problems.

  The reactive polysiloxane compound characterizing the present invention having the above-mentioned specific chemical structure preferably has a weight average molecular weight of 1000 to 20000. Moreover, as a preferable range of the hydroxyl value (JIS K1557) which shows the amount of hydroxyl groups in this compound, it is 5-100 mgKOH / g, More preferably, it is 5-50 mgKOH / g. Furthermore, the reactive polysiloxane compound used in the present invention is a reactive polysiloxane compound obtained by synthesizing a 5-membered cyclic carbonate compound as a raw material by the reaction of an epoxy compound and carbon dioxide as described above. 0.1 to 10% by mass of the total mass of the siloxane compound is composed of —O—CO— bonds derived from carbon dioxide. In addition, it is more preferable that this amount is as large as possible from the viewpoint of environmental compatibility. Hereinafter, components and production methods used for obtaining the reactive polysiloxane compound characterizing the present invention having the above-described characteristics will be described.

<Compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure>
The reactive polysiloxane compound represented by the general formula (1) used for the polymerizable monomer constituting the polymer of the present invention includes, for example, a polysiloxane compound having one amino group at the terminal, and one terminal It can be easily obtained by reacting a compound having an ethylenically unsaturated group and a compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure. First, the “compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure” used in this case will be described. Examples of the compound having such a structure include compounds represented by the following general formula (7) or (8), and any of them can be preferably used in the present invention.

［一般式（７）及び（８）中の、Ｒ₁、Ｒ₂及びＺは、前記一般式（１）中におけるこれらの記号と同義である。具体的には、Ｚは、ないか、−ＣＨ₂−Ｏ−、−Ｏ−、−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）、−ＣＯ−Ｏ−、−ＣＯ−Ｏ−(ＣＨ₂)_n−Ｏ−（但し、ｎは１〜１０の整数）のいずれかであり、また、Ｒ₁及びＲ₂は、それぞれＣＨ₃又はＨであり、同一であっても異なっていてもよい。また、一般式（７）中のＲ₄は、Ｈ又はＣＨ₃である。］

[R ₁ , R ₂ and Z in the general formulas (7) and (8) have the same meanings as those symbols in the general formula (1). Specifically, Z is absent, —CH ₂ —O—, —O—, —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10), —CO—O—. , —CO—O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10), and R ₁ and R ₂ are each CH ₃ or H, and are the same It may or may not be. R ₄ in the general formula (7) is H or CH ₃ . ]

  As described above, the compound represented by the general formula (7) or (8) is synthesized from the reaction of the corresponding epoxy compound and carbon dioxide as shown in the following formula. Is preferred. By using the compound represented by the general formula (7) or (8) synthesized as described above, the reactive polysiloxane compound represented by the general formula (1) has carbon dioxide used as a raw material in its structure. Is incorporated and immobilized, and the polymer of the present invention using this also has a structure in which carbon dioxide is incorporated and immobilized. Therefore, by configuring as described above, the polymer of the present invention becomes more valuable and can cope with environmental problems. Specific examples of the compound represented by the general formula (7) or (8) will be described later.

  As described above, the production conditions for obtaining a 5-membered cyclic carbonate compound represented by the general formula (7) or (8) from the epoxy compound and carbon dioxide include, for example, an epoxy compound as a raw material. In the presence of a catalyst, the reaction may be performed at a temperature of 0 ° C. to 160 ° C. in a carbon dioxide atmosphere pressurized to about atmospheric pressure to 1 MPa for 4 to 24 hours. As a result, a 5-membered cyclic carbonate compound in which carbon dioxide used as a raw material is fixed to the ester moiety can be obtained.

  Examples of the catalyst used for the reaction between the epoxy compound and carbon dioxide include halogenated salts such as lithium chloride, lithium bromide, lithium iodide, sodium chloride, sodium bromide, sodium iodide, and quaternary ammonium salts. Is preferable. The amount used is preferably 1 to 50 parts by mass, more preferably 1 to 20 parts by mass, per 100 parts by mass of the raw material epoxy compound. Further, triphenylphosphine or the like may be used at the same time in order to improve the solubility of salts serving as these catalysts.

  Further, the reaction between the epoxy compound and carbon dioxide can be performed in the presence of an organic solvent. Any organic solvent can be used as long as it dissolves the aforementioned catalyst. Specifically, for example, amide solvents such as N, N-dimethylformamide, dimethyl sulfoxide, dimethylacetamide, N-methyl-2-pyrrolidone, alcohol solvents such as methanol, ethanol, propanol, ethylene glycol, propylene glycol, Ether solvents such as ethylene glycol monomethyl ether, ethylene glycol dimethyl ether, propylene glycol methyl ether, diethylene glycol monomethyl ether, diethylene glycol dimethyl ether, and tetrahydrofuran are preferable organic solvents.

  Examples of the ethylenically unsaturated group in the compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure include an allyl group, an acryl group, and a methacryl group having a double bond. In the present invention, any of these groups may be used. As the specific compound represented by the general formula (7) or (8) described above, which is a compound having both one ethylenically unsaturated group and one 5-membered cyclic carbonate structure, which is preferable in the present invention, Examples thereof include the following compounds (7-1) to (7-8), (8-1), and (8-2).

  Of the compounds exemplified above, those having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure having an ethylenically unsaturated group at one end, in particular the compounds represented by the general formula (7) or (8) In the production, if necessary, it can be carried out in the presence of a polymerization inhibitor for suppressing polymerization of unsaturated bonds during the reaction. The compound that can be used as the polymerization inhibitor in this case is not particularly limited, and examples thereof include phenol polymerization inhibitors such as p-methoxyphenol, quinone polymerization inhibitors such as benzoquinone, 2,2′-methylene-bis (6 Hindered phenol polymerization inhibitors such as -tert-butyl-4-ethylphenol), aromatic amine polymerization inhibitors such as phenothiazine, sulfur polymerization inhibitors such as diphenylthiourea, 2,2,6,6- Any stable radical compound such as tetramethylpiperidine 1-oxyl can be used.

<Polysiloxane compound having an amino group at one end>
The polymer of the present invention is obtained by polymerizing or copolymerizing the reactive polysiloxane compound represented by the general formula (1). The reactive polysiloxane compound characterizing the present invention is the above-mentioned “ethylenically unsaturated group”. And a compound having both a 5-membered cyclic carbonate structure and a “polysiloxane compound having an amino group at one end” as described below. That is, as a result of the above reaction, the reactive polysiloxane characterizing the present invention having a structure having a polysiloxane chain having one hydroxyurethane bond in the structure and a polymerizable ethylenically unsaturated group at the terminal. Become a compound.

  As the “polysiloxane compound having an amino group at one end” used in the present invention, a conventionally known compound can be used without any particular limitation. Of course, a newly synthesized compound according to the object of the present invention can also be used. Can be used. In particular, it is preferable to use a polysiloxane compound having a structure as shown below and having one amino group at one end. As what can be obtained from a market, for example, functional group equivalent 2500 mg / mol one terminal amino group modified silicone oil (trade name: TSF-4701, manufactured by Momentive Performance Materials Japan), functional group equivalent 3000 mg / mol One terminal amino group-modified silicone oil (trade name: TSF-4700, manufactured by Momentive Performance Materials Japan) and the like. Each of these compounds has the structure shown below. The functional group equivalent means the mass of the main skeleton (polydimethylsiloxane) bonded to 1 mol of the amino group which is a functional group.

［上記式中の、Ｙ₁、Ｒ₃、Ｗ及びｍは、前記一般式（１）中におけるこれらの記号と同義である。］

[Y ₁ , R ₃ , W and m in the above formula have the same meanings as those symbols in the general formula (1). ]

<Reaction>
Using the polysiloxane compound having one amino group at one end as described above and the compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure as described above, a 5-membered cyclic carbonate A reactive polysiloxane compound characterizing the present invention can be obtained by reacting the structure (group) with an amino group. For example, the above reaction may be performed in the presence or absence of a solvent at a temperature of 40 to 200 ° C. for 4 to 24 hours to obtain a reactive polysiloxane compound that is a constituent of the polymer of the present invention. Can be obtained.

  As the solvent that can be used in the above reaction, any organic solvent that is inert with respect to the raw material to be used and the compound to be obtained can be used. Examples of preferred ones include methyl ethyl ketone, methyl-n-propyl ketone, methyl isobutyl ketone, diethyl ketone, methyl formate, ethyl formate, propyl formate, methyl acetate, ethyl acetate, butyl acetate, acetone, cyclohexanone, tetrahydrofuran, dioxane, toluene, Xylene, dimethylformamide, dimethyl sulfoxide, perchlorethylene, trichloroethylene, methanol, ethanol, propanol, ethylene glycol, propylene glycol, ethylene glycol monomethyl ether, ethylene glycol dimethyl ether, propylene glycol methyl ether, diethylene glycol monomethyl ether, diethylene glycol dimethyl ether, etc. It is done.

  The above-mentioned reaction between the 5-membered cyclic carbonate group and the amino group can be carried out without using a catalyst, but in order to accelerate the reaction, it can also be carried out in the presence of the following catalysts. It is. Examples of the catalyst used in this case include basic catalysts such as triethylamine, tributylamine, diazabicycloundecene (DBU), triethylenediamine (DABCO), pyridine, and Lewis acid catalysts such as tetrabutyltin and dibutyltin dilaurate. Can be used. It is preferable that the preferable usage-amount of these catalysts shall be in the range of 0.01-10 mass parts with respect to the total amount (100 mass parts) of the carbonate compound and amine compound which are used for reaction.

[Polysiloxane group-containing polymer]
Since the reactive polysiloxane compound represented by the general formula (1) defined in the present invention has a unsaturated bond reactive with the polysiloxane segment in the molecule, it can be homopolymerized or other polymerizable monomer (unsaturated). And a compound having a saturated group). The polysiloxane group-containing polymer of the present invention is a polymer or copolymer obtained by homopolymerizing or copolymerizing the reactive polysiloxane compound described above with another compound having an unsaturated group. It is characterized by.

  There is no restriction | limiting in particular in the polymerizable monomer which can be used when setting it as a copolymer, If it is a compound which has a well-known unsaturated group, it can be used. Examples of such polymerizable monomers include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, octyl acrylate, cyclohexyl acrylate, tetrahydrofurfuryl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate, lauryl methacrylate, methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, styrene, α-methylstyrene, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl chloride, vinylidene chloride , Vinyl fluoride, vinylidene fluoride, glycidyl Acrylate, glycidyl methacrylate, allyl glycidyl ether, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, maleic anhydride, citraconic acid, acrylamide, methacrylamide, N-methylolacrylamide, N, N-dimethylacrylamide, N, Examples thereof include N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl methacrylate, diacetone acrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and allyl alcohol.

  Moreover, the compound shown by the general formula (7) or (8) shown above can also be used as the polymerizable monomer, and it is a preferred embodiment to use these compounds for the following reasons. That is, the polysiloxane group-containing polymer of the present invention obtained by copolymerizing the compound represented by the general formula (7) and the compound represented by the general formula (8) together with the compound represented by the general formula (1). The content derived from carbon dioxide in the combined structure can be increased. More specifically, 0.1 to 20% by mass of the total mass of the polysiloxane group-containing polymer of the present invention can be composed of carbon dioxide-derived —O—CO— bonds. The carbon dioxide content in the polysiloxane group-containing polymer of the present invention can be appropriately controlled depending on the type and ratio of the polymerizable monomer to be used, but from the viewpoint of reducing the environmental burden, the carbon dioxide used in the raw material is more used. It is preferable that the content of —O—CO— bond derived from is increased.

  As described above, the reactive polysiloxane compound characterizing the present invention can be copolymerized with other polymerizable monomers as necessary, but in this case, as described below, such as a hydroxyl group or a carboxyl group. It is also a preferred embodiment to copolymerize a polymerizable monomer having a reactive functional group. Since the reactive polysiloxane compound characterizing the present invention has a reactive hydroxyl group as shown in the general formula (1) defined in the present invention, by reacting with a crosslinking agent such as polyisocyanate, It can be set as the thermosetting film of this invention. Furthermore, the amount of functional groups of the polymer can be increased by copolymerizing the reactive polysiloxane compound with a compound having a reactive functional group such as a hydroxyl group or a carboxyl group. The thermosetting film of the present invention obtained by reacting with a crosslinking agent such as the one further improves the crosslinking density. That is, by configuring as described above, the thermosetting film of the present invention can be applied to a wider range of applications because the cross-linking density can be appropriately changed according to the required performance.

  The concentration of the polysiloxane chain (polysiloxane segment component) in the polysiloxane group-containing polymer of the present invention is not particularly limited, but is contained in the range of about 0.1 to 20% by mass in 100% by mass of the polymer. It is preferable that If it is 0.1% by mass or less, when a coating film is formed using the polymer of the present invention, the orientation of the polysiloxane chain on the surface may be insufficient. On the other hand, at 20 mass% or more, when a coating film is formed using the polymer of the present invention, the coating film tends to be soft and scratch properties and the like tend to be poor. The polymer of the present invention can also be used as an additive component for other resins. However, in such applications, there is no particular problem even if the concentration of the polysiloxane chain is more than 20% by mass. The polysiloxane chain concentration can be controlled by the blend ratio with other resins.

[Polymerization reaction]
The polymerization reaction for obtaining the polysiloxane group-containing polymer of the present invention can be carried out in the absence of a solvent, but it must be carried out at a temperature equal to or higher than the melting point of the obtained polymer, and the viscosity during the reaction is high. In such a case, since the polymerization may become non-uniform, in that case, it is preferable to carry out in a solvent. The amount of the solvent used for the reaction is preferably in the range of 10 to 80% by mass in 100% by mass of the reaction solution.

  There is no restriction | limiting in particular in the solvent which can be used above, The organic solvent as mentioned below can be used suitably. For example, aromatic hydrocarbon solvents such as toluene, xylene, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, ester solvents such as ethyl acetate, butyl acetate, propyl acetate, isobutyl acetate, ethanol, isopropanol, butanol, Examples include alcohol solvents such as isobutanol, and ether solvents such as tetrahydrofuran, ethyl ether, ethylene glycol monomethyl ether, ethylene glycol dimethyl ether, propylene glycol methyl ether, diethylene glycol monomethyl ether, and diethylene glycol dimethyl ether.

  Moreover, in the synthesis | combination of the polymer of this invention, although a polymerization initiator can be used as needed, a conventionally well-known compound can be used without a restriction | limiting in particular in that case. Examples thereof include peroxides such as benzoyl peroxide, lauryl peroxide, cumene peroxide, and azo compounds such as azobisisobutyronitrile, and any of them can be used. The amount used is preferably in the range of 0.1 to 10% by mass, and two or more types can be used in combination as required.

  Moreover, in the synthesis | combination of the polymer of this invention, although reaction temperature does not have a restriction | limiting in particular, It is preferable to set conditions according to the solvent and initiator to be used. For example, it is preferable that it is the range of 50 to 150 degreeC. The reaction time is preferably 2 to 12 hours.

  The polysiloxane group-containing polymer of the present invention obtained as described above needs to have a weight average molecular weight in the range of 10,000 to 1,000,000. The reason for this is that the performance of a coating film (coating film) obtained by utilizing the polymer of the present invention is considered.

[Other ingredients]
The polymer of the present invention having the above-described characteristics can be used as it is, but may be used by blending with other resins. Examples of other resins at this time include acrylic resins, polyurethane resins, polyester resins, polyamide resins, phenoxy resins, styrene elastomers (SBS, SEBS, maleic acid-modified SEBS, etc.), and olefin elastomers (EPR). , EPDM, etc.), styrene resins (PS, HIPS, AS, ABS, AES, etc.), chlorine resins (PVC, chlorine polyethylene, etc.), olefin resins (PE, PP, EVA, etc.) and the like.

[Thermosetting film]
The polysiloxane group-containing polymer of the present invention is thermoplastic and can form a film. Moreover, when forming a film, it can be made into a thermosetting film by making it crosslink with a various crosslinking agent using the hydroxyl group which the hydroxy urethane bond has at the time of the film formation. By fixing the molecular chain by crosslinking, performance such as durability, heat resistance, and contamination resistance of the coating is improved. In particular, since the polysiloxane group-containing polymer of the present invention has a hydroxyl group directly bonded to a siloxane chain, it is fixed in a state where the siloxane chain is surface-oriented by crosslinking, so that the above-described effect obtained by crosslinking is large.

  Any crosslinking agent may be used as long as it reacts with the hydroxyl group of the polysiloxane group-containing polymer of the present invention. For example, urea resin, melamine resin, epoxy resin, polyisocyanate, acid anhydride, organic titanium compound and the like can be used. Among these, particularly preferred crosslinking agents include polyisocyanates. The amount of the crosslinking agent as described above is preferably such an amount that 10 to 90% of the hydroxyl groups of the polysiloxane group-containing polymer of the present invention are reacted.

  Moreover, as a method for obtaining a film from the polysiloxane group-containing polymer of the present invention, for example, either a melt molding method or a method of forming a resin layer on a substrate by a coating method from a solution state However, in order to obtain a crosslinked film having excellent surface performance, it is preferable to carry out by a coating method. As a specific method, apply it to the substrate with a gravure coater, knife coater, reverse coater, bar coater, spray coater, slit coater, etc., volatilize the solvent, and if it is in the presence of a crosslinking agent, heat cure further Thus, a dry film or a thermosetting film can be obtained.

  Next, the present invention will be described more specifically with specific synthesis examples, examples and comparative examples, but the present invention is not limited to these examples. In the following examples, “part” and “%” are based on mass unless otherwise specified.

(Synthesis Example 1) [Production of Reactive Polysiloxane Compound HS-1 Represented by General Formula (1)]
(Production of 5-membered cyclic carbonate compound C-1)
100 parts of glycidyl methacrylate (Mitsubishi Rayon, trade name: Acryester G, molecular weight 142.1), 5.4 parts of lithium bromide (manufactured by Wako Pure Chemical Industries) as a catalyst, and 100 parts of N-methyl-2-pyrrolidone Was charged in a reaction vessel equipped with a stirrer and a reflux with an air opening. Subsequently, carbon dioxide was continuously blown in with stirring, and the reaction was performed at 100 ° C. for 10 hours. To the solution after completion of the reaction, 200 parts of water and 200 parts of toluene were added and mixed. The obtained mixed liquid is transferred to a separating funnel, the separated water tank (lower layer) is removed, and then washed in 50 parts of water in the separating funnel three times in the same manner, whereby the catalyst is removed from the reaction liquid. Was removed. From the washed toluene layer (upper layer), toluene was evaporated by a rotary evaporator to obtain a pale yellow liquid substance (yield 93%).

The liquid material obtained above was analyzed by IR (measured with an infrared spectrophotometer FT-720 manufactured by HORIBA, Ltd. The same applies to the following). As a result, the raw material epoxy near 910 cm ⁻¹ was analyzed. Absorption derived from the group disappeared, and absorption derived from the carbonyl of the carbonate group that could not be present in the raw material was confirmed in the vicinity of 1800 cm ⁻¹ . FIG. 1 shows the IR chart. Moreover, as a result of analysis by gas chromatography (manufactured by Shimadzu Corporation, trade name: GC-2014, column DB-1), the peak of the glycidyl methacrylate of the raw material disappeared and the appearance of a new peak having a longer retention time than the raw material was confirmed. The peak material that appeared was 97% pure by the simple area percentage method.

  From the above results, it was confirmed that the liquid material obtained above was a compound having a structure represented by the following formula in which a cyclic carbonate group was introduced by the reaction of an epoxy group and carbon dioxide. This was abbreviated as C-1. It was 23.6% when the ratio for which the component derived from the carbon dioxide used as a raw material occupied in the chemical structure of C-1 was calculated. This value is a calculated value obtained from the molecular weight on the chemical structural formula. Also for the following examples, the amount of carbon dioxide in the compound structure was calculated in the same manner.

(Production of Reactive Polysiloxane Compound HS-1 Represented by General Formula (1))
7.4 parts of C-1 obtained in Synthesis Example 1 and 100 amino acid-modified silicone oil having a functional group equivalent of 2500 g / mol (product name: TSF-4701, manufactured by Momentive Performance Materials Japan) , 46 parts of toluene, 0.007 part of p-methoxyphenol (manufactured by Wako Pure Chemical Industries, Ltd.) as a polymerization inhibitor, and charged in a reaction vessel equipped with a stirrer and a reflux opening with an atmosphere opening. Next, the reaction was performed at 60 ° C. with stirring. The progress of the reaction was confirmed by neutralization titration of the reaction solution sampled during the reaction, and the reaction was terminated when the amine concentration decreased below the measurement limit. The reaction time was 8 hours.

The IR analysis of the solution after the reaction, the peak of the carbonyl derived cyclic carbonate around 1800 cm ^-1 is disappeared, in the vicinity of 1760 cm ^-1, a new peak attributable to carbonyl of the urethane bond. FIG. 2 shows the IR chart. After confirming the completion of the reaction, the reaction vessel was depressurized to completely remove toluene, and a pale yellow transparent liquid compound was obtained.

  The obtained compound had a hydroxyl value (JIS K1557-1) of 18.9 mgKOH / g and a weight average molecular weight (in terms of polystyrene) of 4300 as measured by GPC. From the above, it was confirmed that the obtained compound was a reactive polysiloxane compound represented by the general formula (1) defined in the present invention containing an unsaturated group at one end via a hydroxyurethane bond. It was done. This was abbreviated as HS-1. The proportion of carbon dioxide components derived from C-1 used for the reaction in the chemical structure of HS-1 is 1.6% (calculated value from molecular weight on chemical structural formula).

(Synthesis Example 2) [Production of Reactive Polysiloxane Compound HS-2 Represented by General Formula (1)]
(Production of polysiloxane compound S-1 having an amino group at one end)
90 g of one-end hydrogen polydimethylsiloxane having a molecular weight of about 900 (trade name: MCR-H07, manufactured by Gelest), 48.4 g of N, N-bis (trimethylsilyl) allylamine, platinum 1,3-divinyltetramethyldisiloxane complex ( 3% xylene solution) (0.03 g) was added, the temperature was raised to 60 ° C., and the reaction was carried out for 2 hours. Next, 60 g of methanol was added and the reaction was carried out for 6 hours under reflux conditions. After completion of the reaction, methanol and unreacted N, N-bis (trimethylsilyl) allylamine were distilled off under reduced pressure to obtain a transparent oily substance. The total amine value (JIS-K7237) of this oily substance was 58 mgKOH / g. From this, this substance was confirmed to be a polysiloxane compound having an amino group at one end represented by the following structural formula, and this was abbreviated as S-1. In addition, said manufacturing method utilized the method of patent 3666551.

(Production of Reactive Polysiloxane Compound HS-2 Represented by General Formula (1))
HS- in Synthesis Example 1 except that 19.2 parts of C-1 obtained in Synthesis Example 1 and 100 parts of S-1 obtained above, 51 parts of toluene, and 0.019 part of p-methoxyphenol were used. A light yellow transparent liquid compound was obtained by the same operation as in the production of 1. The obtained compound had a hydroxyl value (JIS K1557-1) of 47.5 mgKOH / g and a weight average molecular weight (in terms of polystyrene) of 1100 as measured by GPC. From the above, the obtained compound is a reactive polysiloxane compound represented by the general formula (1) defined in the present invention containing an unsaturated group at one end via a hydroxyurethane bond. confirmed. This was abbreviated as HS-2. In the chemical structure of HS-2, the proportion of the carbon dioxide component derived from C-1 used for the reaction in the chemical structure of the obtained compound was 3.8% (molecular weight on chemical structural formula) Calculated from

(Example 1) [Example of copolymer of reactive polysiloxane compound and other polymerizable monomer]
(Production of polysiloxane group-containing polymer-1)
10 parts of HS-1 obtained in Synthesis Example 1, 60 parts of methyl methacrylate (trade name: Acryester M, manufactured by Mitsubishi Rayon Co., Ltd.), 2-hydroxyethyl methacrylate (hereinafter abbreviated as “2-HEMA”) 30 parts (manufactured by Mitsubishi Gas Chemical Co., Inc.), 1 part azobisisobutyronitrile (trade name: V-60, manufactured by Wako Pure Chemical Industries, Ltd.) as a polymerization initiator, 33 parts toluene, methyl isobutyl 33 parts of ketone were charged in a reaction vessel equipped with a stirrer and a refluxing device with an air opening. The reaction was performed at 70 ° C. for 8 hours with stirring under a nitrogen stream. After completion of the reaction, 42 parts of toluene and 42 parts of methyl isobutyl ketone were added and diluted, and then cooled to room temperature to obtain a transparent viscous resin solution. The molecular weight of the obtained resin solution was measured by GPC analysis using THF as a mobile phase (manufactured by Tosoh Corporation, GPC-8020 (trade name); column Super AW2500 + AW3000 + AW4000 + AW5000; the same applies to the following). As a result, the weight average molecular weight (polystyrene conversion) was 62000, and the hydroxyl value (JIS K1557-1) was 59 mgKOH / g. This value was 148 mgKOH / g when converted to the value of the resin alone. FIG. 3 shows an IR chart of the obtained resin. The proportion of carbon dioxide in the resin is 0.2% (calculated value from the resin composition).

(Formation of cured film)
To 100 parts of the resin solution obtained above, 8 parts of Duranate 24A-100 (trade name: manufactured by Asahi Kasei Co., Ltd.), which is a biuret-type hexamethylene diisocyanate polyisocyanate, is added as a crosslinking agent. The solid content was diluted to 40% to prepare a paint. Using the obtained paint as a base material, a polyethylene terephthalate film (trade name: Lumirror S10, manufactured by Toray Industries, Inc., hereinafter abbreviated as PET or PET film) having a thickness of 100 μm was used. This was applied using an 8-bar coater and dried at 100 ° C. for 60 minutes to form a crosslinked film having a thickness of about 5 μm on PET, which was used as an evaluation sample.

(Example 2) [Example of copolymer of reactive polysiloxane compound and other polymerizable monomer]
(Production of polysiloxane group-containing polymer-2)
10 parts of HS-2 obtained in Synthesis Example 2, 60 parts of methyl methacrylate (trade name: Acryester M, manufactured by Mitsubishi Rayon Co., Ltd.), 30 parts of 2-HEMA, azobisisobutyrate as a polymerization initiator In a reaction vessel equipped with 1 part of nitrile (trade name: V-60, manufactured by Wako Pure Chemical Industries, Ltd.), 33 parts of toluene, 33 parts of methyl isobutyl ketone, a stirrer and a reflux device with an air opening Was charged. The reaction was performed at 70 ° C. for 8 hours with stirring under a nitrogen stream. After completion of the reaction, 42 parts of toluene and 42 parts of methyl isobutyl ketone were added and diluted, and then cooled to room temperature to obtain a transparent viscous resin solution. The molecular weight of the obtained resin solution was measured in the same manner as in Example 1 by GPC analysis using THF as a mobile phase. As a result, the weight average molecular weight (polystyrene conversion) was 59000, and the hydroxyl value (JIS K1557-1) was 58 mgKOH / g. This value was 145 mgKOH / g when converted to the value of the resin alone. The proportion of carbon dioxide in the resin is 0.4% (calculated value from the resin composition).

(Formation of cured film)
To 100 parts of the resin solution obtained above, 8 parts of Duranate 24A-100 (trade name: manufactured by Asahi Kasei Co., Ltd.), which is a biuret-type hexamethylene diisocyanate polyisocyanate, is added as a crosslinking agent. The solid content was diluted to 40% to prepare a paint. Using the obtained paint as a base material, a PET film having a thickness of 100 μm was used. This was applied using an 8-bar coater and dried at 100 ° C. for 60 minutes to form a crosslinked film having a thickness of about 5 μm on PET, which was used as an evaluation sample.

(Example 3) [Example of copolymer of reactive polysiloxane compound and other polymerizable monomer]
(Production of polysiloxane group-containing polymer-3)
10 parts of HS-2 obtained in Synthesis Example 2, 30 parts of 2-HEMA, 60 parts of C-1 obtained in Synthesis Example 1, and azobisisobutyronitrile (trade name: V- 60, manufactured by Wako Pure Chemical Industries, Ltd.), 33 parts of toluene, 33 parts of methyl isobutyl ketone, and charged in a reaction vessel equipped with a stirrer and a reflux device with an air opening. The reaction was performed at 70 ° C. for 8 hours with stirring under a nitrogen stream. After completion of the reaction, 42 parts of toluene and 42 parts of methyl isobutyl ketone were added and diluted, and then cooled to room temperature to obtain a transparent viscous resin solution. The molecular weight of the obtained resin solution was measured in the same manner as in Example 1 by GPC analysis using THF as a mobile phase. As a result, the weight average molecular weight (polystyrene conversion) was 42000, and the hydroxyl value (JIS K1557-1) was 55 mgKOH / g. This value was 138 mgKOH / g when converted to the value of the resin alone. The proportion of carbon dioxide in this resin is 14.5% (calculated value from the resin composition).

(Comparative Example 1)
Instead of HS-1, which is the reactive polysiloxane compound used in Example 1, 10 parts of methacryl-modified silicone oil having a functional group equivalent of 2300 g / mol (trade name: X22-174BX, manufactured by Shin-Etsu Chemical Co., Ltd.) A resin solution of this comparative example was prepared with the same composition as in Example 1 except that it was used. The obtained resin solution was not uniform and separated when left standing.

  The resin solution obtained above was stirred and suspended in the same manner as in Example 1, 8 parts of Duranate 24A-100 as a cross-linking agent was added to 100 parts of the resin solution, and the solid content was further reduced with toluene. Was diluted to 40% to prepare a paint. This paint was also in a state of separation when allowed to stand. The prepared paint was sufficiently stirred and separated on a PET film having a thickness of 100 μm before separation. The coating was applied using an 8-bar coater and dried at 100 ° C. for 60 minutes to form a crosslinked film having a thickness of about 5 μm on PET, which was used as an evaluation sample.

(Comparative Example 2)
Instead of HS-1 which is the reactive polysiloxane compound used in Example 1, 10 parts of methacryl-modified silicone oil having a functional group equivalent of 900 g / mol (trade name: X22-174ASX, manufactured by Shin-Etsu Chemical Co., Ltd.) A resin solution of this comparative example was prepared with the same composition as in Example 1 except that it was used. The obtained resin solution was not uniform and separated when left standing.

  The resin solution obtained above was stirred and suspended in the same manner as in Example 1, 8 parts of Duranate 24A-100 as a cross-linking agent was added to 100 parts of the resin solution, and the solid content was further reduced with toluene. Was diluted to 40% to prepare a paint. This paint was also in a state of separation when allowed to stand. The prepared paint was sufficiently stirred and separated on a PET film having a thickness of 100 μm before separation. The coating was applied using an 8-bar coater and dried at 100 ° C. for 60 minutes to form a crosslinked film having a thickness of about 5 μm on PET, which was used as an evaluation sample.

(Comparative Example 3)
Instead of HS-1 which is the reactive polysiloxane compound used in Example 1, 1 part of methacryl-modified silicone oil (trade name: X22-174ASX) having a functional group equivalent of 900 g / mol was used and methyl methacrylate (trade name) : Acryester M) 69 parts, 2-HEMA 30 parts, azobisisobutyronitrile (trade name: V-60) 1 part as an initiator, toluene 33 parts, methyl isobutyl ketone 33 parts, Reaction was carried out in the same manner as in Example 1 to obtain a translucent viscous resin solution. The obtained resin solution was in a uniform state.

  To 100 parts of the resin solution obtained above, 8 parts of Duranate 24A-100 as a crosslinking agent was added, and further diluted with toluene to a solid content of 40% to prepare a paint. Using the prepared paint, a crosslinked film having a film thickness of about 5 μm was prepared on PET in the same manner as in Example 1, and this was used as an evaluation sample.

(Comparative Example 4)
Instead of HS-1, which is a reactive polysiloxane compound, 10 parts of methacryl-modified silicone oil (trade name: X22-174BX) having a functional group equivalent of 2300 g / mol was used, and C-1 obtained in Synthesis Example 1 was 60 The reaction was performed in the same manner as in Example 1 except that 30 parts of 2-HEMA, 1 part of azobisisobutyronitrile (trade name: V-60), 33 parts of toluene, and 33 parts of methyl isobutyl ketone were used. The resin solution of this comparative example was produced. The obtained resin solution was not uniform and separated when left standing.

  10 parts of duranate 24A-100 as a crosslinking agent was added to 100 parts of the resin solution obtained above to prepare a coating material. In the same manner as in Example 1, a crosslinked film having a film thickness of about 5 μm was formed on PET and used as a sample for evaluation. The proportion of the carbon dioxide component in the cross-linked coating component is 8.1% (calculated value from all formulations).

  Table 1 summarizes the blending and physical properties of the resin solutions of the above examples and comparative examples. In Table 1, the hydroxyl value in Table 1 is the value of the resin solution in the upper part, the lower part is the converted value of the resin alone, and the unit is mgKOH / g.

(Evaluation)
The evaluation samples obtained in Example 1 and Comparative Examples 1 to 4 were evaluated according to the following items and evaluation criteria. The results are summarized in Table 1.

[Water repellency]
The contact angle of water at 20 ° C. on each evaluation sample surface was measured using a contact angle meter (trade name: CA-A type, manufactured by Kyowa Interface Science Co., Ltd.). The measured values obtained are shown in Table 2.

[Oil repellency]
The contact angle of n-dodecane at 20 ° C. on each evaluation sample surface was measured using the same contact angle meter as described above. The measured values obtained are shown in Table 2.

[Releasability]
A cellophane tape having a width of 24 mm was applied to the coating film of each evaluation sample, and was subjected to one reciprocal pressing with a 2 kg roller. The peel strength at 180 ° peeling was measured using an autograph. The actually measured peel strength at a width of 24 mm is indicated by gf. The results measured above are shown in Table 2.

[Migration]
The cellophane tape used for the releasability test was peeled off from the sample, and then attached to the PET film again, and the peel strength against the PET film was measured in the same manner as the releasability test. And the residual adhesive rate with respect to the peeling strength of the unused cellophane tape measured previously and PET film was calculated | required from the following formula | equation, it evaluated by the following reference | standard, and the result was shown in Table 2.
Residual adhesion rate = peel strength of cellophane tape used for measurement of releasability from PET film
÷ Peel strength of unused cellophane tape to PET film × 100
<Evaluation criteria>
○: Residual adhesion rate 95% or more △: Residual adhesion rate 80% or more and less than 95% ×: Residual adhesion rate less than 80%

[Base material adhesion]
A sample obtained by cutting a cured coating film containing a PET film as a substrate into 3 cm × 3 cm was used as an evaluation sample. The central part of this sample was folded until the crease was formed at 180 degrees on the opposite side with the coated surface facing up, and the state of the coating film was visually observed. And it evaluated in three steps on the basis of the following criteria, and the result is shown in Table 2.
<Evaluation criteria>
○: No cracking or peeling of the coating film can be confirmed.
(Triangle | delta): Although the coating film has not peeled, the crack has generate | occur | produced in the bending part.
X: A part of coating film peeled off.

[Decontamination]
Draw a line on the coating film with Black Magic (trade name: Magic Ink No. 500, manufactured by Teranishi Chemical Industry Co., Ltd.), leave it for 5 minutes, wipe it off with dry tissue paper, and visually check the remaining ink. Observed with. And it evaluated in three steps by the following reference | standard, The result was shown in Table 2.
<Evaluation criteria>
○: Ink can be completely removed.
Δ: Most of the ink can be removed, but a trace remains.
X: Ink cannot be removed.

[Environmental compatibility]
Using the carbon dioxide content (%) of each crosslinked coating, the environmental compatibility was evaluated in four stages according to the following criteria. The results are shown in Table 2.
<Evaluation criteria>
◎: 10% by mass or more ○: 3% by mass or more and less than 10% by mass Δ: 0.1% by mass or more and less than 3% by mass ×: Less than 0.1% by mass

  As is apparent from Table 2, according to the polymers of the examples of the present invention, any of water repellency, oil repellency, mold release, migration, substrate adhesion, and stain resistance (contamination removal) can be obtained. It was confirmed that a cured film containing an excellent polysiloxane group can be formed. The reason why such a remarkable effect was obtained is that, particularly, the reactive polysiloxane compound represented by the general formula (1) characterizing the polymer of the present invention is a polysiloxane having an unsaturated group in its structure. Since the unsaturated group and the polysiloxane structure are bonded to each other by a hydroxyurethane bond having a hydroxyl group, the polymer of the present invention is obtained by using this compound as a polymerizable monomer. It is considered that the chemical structure has a hydroxyl group at the root of the polysiloxane structure, and as a result, the orientation of the hydrophobic polysiloxane chain to the air interface (coating surface) was promoted and its function was fully exhibited. It is done. The hydroxyl group present in the polymer structure of the present invention can also be used for a crosslinking reaction, and the orientation of the polysiloxane chain can be fixed by crosslinking the base part of the polysiloxane chain with a crosslinking agent. It is thought that it contributes to the expression of functionality.

  On the other hand, in the comparative example of Table 2, since acrylic-modified polysiloxane with strong hydrophobicity was used, the oligomerized segment caused phase separation during the copolymerization reaction, and a copolymer having a random sequence could not be synthesized. Think of it as something. As a result, the peel strength of the cellophane tape was small and the releasability seemed good, but the siloxane component was bleeding on the surface, resulting in poor migration and contamination removal. In addition, it can be considered that the evaluation of adhesion is that the siloxane segment is separated and the resin itself is not flexible and cannot follow the bending of the base material.

  Furthermore, the polymer of the present invention can be produced by using the reactive polysiloxane compound represented by the general formula (1), which is used as a polymerizable monomer, using carbon dioxide as a part of raw materials. Therefore, it can have excellent environmental compatibility.

  As described above, as an application example of the present invention, a water-repellent, oil-repellent, releasable, transferable, base material adhesion and anti-resisting property can be obtained using a polysiloxane group-containing polymer that has not been obtained by conventional techniques. It is possible to provide a material that can form a coating (coating film) that has both contamination and excellent functionality, and its use is expected. Furthermore, the present invention is a technology excellent in environmental compatibility, and as a substitute for an existing polysiloxane group-containing polymer, which is clearly superior to conventional materials only from the standpoint of global environmental conservation. Expected to be used.

Claims (9)

Represented by the following general formula (1), through a hydroxy urethane bond, a reactive polysiloxane compound having an ethylenically unsaturated group at one terminal, copolymerized with the resulting co-polymer with another polymerizable monomer The content of the repeating unit derived from the reactive polysiloxane compound represented by the general formula (1) is 0.1 to 20% by mass, and the weight average molecular weight is 10,000 to 1,000,000. A polysiloxane group-containing polymer.

[In General Formula (1), m is an integer of 0 to 300, and X ₁ is a hydroxyurethane bond selected from the following formulas (2) to (5) having a hydroxyl group and a urethane bond. Yes, Z is absent, —CH ₂ —O—, —O—, —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10), —CO—O—, —CO —O— (CH ₂ ) _n —O— (where n is an integer of 1 to 10). R ₁ and R ₂ are each CH ₃ or H, and may be the same or different, and R ₃ is CH ₃ or a group of the formula (6), and may be the same or different. It may be. Y ₁ may contain any of O, S or N or a cyclic structure in the structure, and the alkylene group or arylene group or polyethylene having 1 to 300 repeating units having 1 to 30 carbon atoms. Glycol chain. W is an alkoxy group having 1 to 30 carbon atoms, or an alkyl group or aryl group having 1 to 30 carbon atoms, which may contain any element of O, S or N or a cyclic structure in the structure. is there. ]

[In the formula (2), R ₄ is H or CH ₃ . ]

[In the formula (3), R ₄ is H or CH ₃ . ]

[In Formula (6), m is any integer of 0 to 300, and W is an alkoxy group having 1 to 30 carbon atoms, or any element of O, S, or N in the structure, or cyclic It is a C1-C30 alkyl group or aryl group which may contain a structure. ]   The polysiloxane group-containing polymer according to claim 1, wherein the reactive polysiloxane compound has a hydroxyl value of 5 to 100 mgKOH / g.   The other polymerizable monomer for forming the copolymer is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid ester, and methacrylic acid ester. The polysiloxane group-containing polymer described.   The reactive polysiloxane compound includes a polysiloxane compound having an amino group at one end and a compound having both an ethylenically unsaturated group and a 5-membered cyclic carbonate structure having an ethylenically unsaturated group at one end. The polysiloxane group-containing polymer according to any one of claims 1 to 3, which is a reaction product. The compound having both the ethylenically unsaturated group and the 5-membered cyclic carbonate structure has the following general formula (7) having one ethylenically unsaturated group and one 5-membered cyclic carbonate structure: Or the polysiloxane group containing polymer of Claim 4 which is a compound shown by General formula (8).

[R ₁ , R ₂ and Z in the general formulas (7) and (8) have the same meanings as those symbols in the general formula (1), and R ₄ in the general formula (7) is H Or CH ₃ . ] The polysiloxane group-containing polymer according to claim 4 or 5, wherein the polysiloxane compound having an amino group at one end is a compound represented by the following formula.

[Y ₁ , R ₃ , W and m in the above formula have the same meanings as those symbols in the general formula (1). ]   The 5-membered cyclic carbonate structure is a composite of an epoxy group and carbon dioxide, and 0.1 to 20 mass% of the total mass of the polymer or copolymer is -O- derived from the carbon dioxide. The polysiloxane group-containing polymer according to any one of claims 4 to 6, comprising a CO-bond.   A thermosetting film, which is a reaction product of the polysiloxane group-containing polymer according to any one of claims 1 to 7 and a crosslinking agent.   The thermosetting film according to claim 8, wherein the crosslinking agent is a polyisocyanate.

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