WO2021241295A1 - 親水化処理剤 - Google Patents
親水化処理剤 Download PDFInfo
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- WO2021241295A1 WO2021241295A1 PCT/JP2021/018538 JP2021018538W WO2021241295A1 WO 2021241295 A1 WO2021241295 A1 WO 2021241295A1 JP 2021018538 W JP2021018538 W JP 2021018538W WO 2021241295 A1 WO2021241295 A1 WO 2021241295A1
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
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- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C08L39/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions of derivatives of such polymers
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- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
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- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
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- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/025—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing nitrogen atoms
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- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/10—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
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- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
- C08L101/14—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity the macromolecular compounds being water soluble or water swellable, e.g. aqueous gels
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Definitions
- the present invention relates to a hydrophilizing agent.
- hydrophilic treatment agent that imparts anti-fog properties to a base material such as glass
- those containing silicate oligomers and silica gel are known.
- a hydrophilization treatment agent having a betaine structure is also known (see, for example, Patent Document 1).
- Patent Document 1 discloses a hydrophilic coating agent obtained by polymerizing a monomer component containing a betaine monomer and an alkoxysilyl group-containing compound.
- the film formed by the hydrophilic coating agent is said to have excellent anti-fog and abrasion resistance.
- the conventional hydrophilic coating agents including the technique disclosed in Patent Document 1 have a problem that the formed hydrophilic film easily deteriorates in anti-fog property in a moist heat environment. In addition, there was still room for improvement in the scratch resistance of the hydrophilic film.
- the present invention has been made in view of the above, and an object of the present invention is to provide a hydrophilic treatment agent capable of obtaining a hydrophilic film having favorable hydrophilicity and anti-fog properties, and excellent moisture resistance and scratch resistance. And.
- the present invention comprises a hydrophilic polymer (A) having an alkoxysilyl group and at least one of its hydrolyzates and a betaine structure in the molecule, a hydrophilic polymer having an ionic functional group, and a polar functional group.
- the hydrophilic polymer (B) which is at least one of the nonionic hydrophilic polymers having the above, and the said, with respect to the total mass of the solid content of the hydrophilic polymer (A) and the hydrophilic polymer (B).
- the present invention relates to a hydrophilizing treatment agent, wherein B / (A + B), which is the solid content mass ratio of the hydrophilic polymer (B), is 1.0 to 51.0%.
- hydrophilic treatment agent capable of obtaining a hydrophilic film having favorable hydrophilicity and anti-fog properties, and having excellent moisture resistance and scratch resistance.
- the hydrophilic treatment agent according to the present embodiment has a hydrophilic polymer (A) having an alkoxysilyl group and at least one of its hydrolyzates, a betaine structure in the molecule, and a hydrophilicity having an ionic functional group. Includes a sex polymer and a hydrophilic polymer (B) having at least one of a nonionic hydrophilic polymer having a polar functional group.
- the hydrophilic polymer (A) and the hydrophilic polymer (B) form an ion-crosslinked network or a network by a dipole-dipole interaction in the hydrophilic film formed by the hydrophilizing agent, whereby the hydrophilic film is formed.
- the preferable moisture and heat resistance and scratch resistance of the above can be obtained.
- the hydrophilic polymer (A) preferably has a betaine structure and preferably has an alkoxysilyl group or a silanol group at least at the terminal in the molecule.
- the hydrophilic polymer (A) can be obtained, for example, by polymerizing a betaine monomer and a compound containing an alkoxysilyl group or a silanol group.
- the betaine monomer is a compound having a betaine structure in the molecule. Since the hydrophilic polymer (A) has a betaine structure in the molecule, it is possible to impart preferable anti-fog property to the hydrophilic film formed by the hydrophilizing treatment agent.
- the betaine structure consists of cations and anions within the same molecule of betaine monomer.
- the cation is not particularly limited, and examples thereof include quaternary ammonium, sulfonium, and phosphonium.
- the anion is not particularly limited, for example, -SO 3 -, -CO 2 - , -PO 3 H -, -OPO 3 - , and the like.
- betaine monomer for example, quaternary ammonium is preferably used as a cation. Further, the quaternary ammonium and cationic, sulfoxy group (-SO 3 -) is more preferably an anion of. These betaine monomers may be used alone or in combination of two or more.
- the betaine monomer has one or more polymerizable functional groups such as an acryloyl group or a methacryloyl group (hereinafter, may be referred to as "(meth) acryloyl group”) in addition to the above betaine structure.
- the polymerizable functional group is not particularly limited, and is, for example, a (meth) acryloylaminoalkyl group having 1 to 4 carbon atoms in the alkyl group and a (meth) acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group. And so on.
- Examples of the (meth) acryloylaminoalkyl group having 1 to 4 carbon atoms include a (meth) acryloylaminomethyl group, a (meth) acryloylaminoethyl group, a (meth) acryloylaminopropyl group, and a (meth) acryloylaminobutyl group. Group etc. can be mentioned.
- Examples of the (meth) acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group include (meth) acryloyloxymethyl group, (meth) acryloyloxyethyl group, (meth) acryloyloxypropyl group, and (meth). Examples thereof include an acryloyloxybutyl group.
- the quaternary ammonium and cationic, sulfoxy group (-SO 3 -) as a betaine monomer and the anion is not particularly limited, for example, N- (meth) acryloyloxy alkyl -N, N-dimethyl ammonium alkyl - ⁇ -sulfobetaine, N- (meth) acryloyloxyalkoxyanercoxy-N, N-dimethylammoniumalkyl- ⁇ -sulfobetaine, N, N-di (meth) acryloyloxyalkyl-N-methylammoniumalkyl- ⁇ -Sulfobetaine, N, N, N-tri (meth) acryloyloxyalkylammonium alkyl- ⁇ -sulfobetaine and the like can be mentioned.
- the compound containing an alkoxysilyl group is not particularly limited, but for example, it is preferable to have at least one alkoxy group having 1 to 4 carbon atoms in the molecule.
- R 1 represents an alkylene group having 1 to 12 carbon atoms.
- Specific examples of such compounds include, for example, 2-mercaptomethyltrimethoxysilane, 2-mercaptoethyltrimethoxysilane, 2-mercaptoproltrimethoxysilane, 2-mercaptobutyltrimethoxysilane, and 2-mercaptomethyltriethoxy.
- Silane 2-mercaptoethyltriethoxysilane, 2-mercaptoproltriethoxysilane, 2-mercaptobutyltriethoxysilane, 2-mercaptomethyltripropoxysilane, 2-mercaptoethyltripropoxysilane, 2-mercaptoproltripropoxysilane, Examples thereof include 2-mercaptobutyltripropoxysilane, 2-mercaptomethyltributoxysilane, 2-mercaptoethyltributoxysilane, 2-mercaptoproltribtoxysilane, and 2-mercaptobutyltributoxysilane.
- the molecules of two compounds having at least one alkoxy group having 1 to 4 carbon atoms in the above-mentioned molecule are linked by an azo group. This improves the wear resistance of the formed hydrophilic film.
- methylene group, —O— group, —C (O) O— group, —O (O) C— group, —NH— group, —CO— group, arylene group, urethane bond, 1, 2-It may have an imidazoline group or the like.
- Such compounds include, for example, 2,2'-azobis [2- (1- (trimethoxysilylpropylcarbamoyl) -2-imidazolin-2-yl) propane], 2,2'-azobis [ 2- (1- (Triethoxysilylpropylcarbamoyl) -2-imidazolin-2-yl) propane], 2,2'-azobis [2- (1- (tripropoxysilylpropylcarbamoyl) -2-imidazolin-2-yl) Il) Propyl], 2,2'-azobis [N- [2- (trimethoxysilylpropylcarbamoyl) ethyl] isobutyramide], 2,2'-azobis [N- [2- (triethoxysilylpropylcarbamoyl) ethyl) ] Isobutyramide], 2,2'-azobis [N- [2- (triethoxysilylpropylcarbamoyl
- the compound containing a silanol group is not particularly limited, but can be obtained, for example, by hydrolyzing the alkoxysilyl group of the above-mentioned alkoxysilyl group-containing compound to form a silanol group.
- the compound containing a silanol group can be obtained by reacting a silyl chloride such as trimethylsilyl chloride or dimethyl (t-butyl) chloride with an active hydrogen-containing compound.
- the above-mentioned compound having an alkoxysilyl group or a silanol group may be used alone or in combination of two or more.
- the content of the compound having an alkoxysilyl group or a silanol group in the hydrophilic polymer (A) is preferably 0.01 to 30 parts by mass per 100 parts by mass of the hydrophilic polymer (A).
- the hydrophilic polymer (A) may contain a compound other than the above-mentioned betaine monomer and a compound having an alkoxysilyl group or a silanol group, as long as the effect of the present invention is not impaired.
- the compound is not particularly limited, and conventionally known compounds are used.
- the method for obtaining the hydrophilic polymer (A) by polymerizing the betaine monomer and the compound having an alkoxysilyl group or a silanol group is not particularly limited, and each component is dissolved in a solvent, if necessary.
- examples thereof include a solution polymerization method in which a polymerization initiator is added to polymerize.
- the amount of the solvent is not particularly limited, but can be adjusted, for example, so that the concentration of the monomer component in the solution is 10 to 80% by mass.
- the hydrophilic polymer (B) may be at least one of an ionizable hydrophilic polymer having an ionic functional group and a nonionic hydrophilic polymer having a polar functional group.
- the hydrophilic polymer (B) is preferably an ionizable hydrophilic polymer having an ionic functional group.
- the hydrophilic polymer (B) in the hydrophilic treatment agent, the hydrophilic polymer (A) and the ionizable hydrophilicity having an ionic functional group are obtained.
- the FT-IR measurement of the hydrophilic film formed by the hydrophilic treatment agent according to the present embodiment containing the polymer (B) was performed, between the hydrophilic polymer (A) and the hydrophilic polymer (B). It was confirmed that an ion-bridged network was formed in. Therefore, it is considered that preferable scratch resistance of the formed hydrophilic film can be obtained as compared with the conventional hydrophilization treatment agent.
- the film mainly composed of this ion cross-linking network does not contain functional groups that are considered to cause a decrease in hydrophilicity due to a chemical reaction in a moist heat environment, it is unlikely that the decrease in hydrophilicity will occur in a moist heat environment. Conceivable. Further, with respect to the hydrophilic treatment agent containing the hydrophilic polymer (A) and the nonionic hydrophilic polymer (B) having a polar functional group, a network by a dipole-dipole interaction is formed by forming a network. It is considered that the same effect as above can be obtained.
- the ionic functional group of the hydrophilic polymer (B) having an ionic functional group is preferably an anionic functional group or an amphoteric functional group, and more preferably an anionic functional group.
- the anionic functional group is not particularly limited, but is preferably either a carboxy group or a sulfo group.
- the hydrophilic polymer (B) having a carboxy group is not particularly limited, and for example, polyacrylic acid, sodium polyacrylate, ammonium polyacrylate, maleic anhydride copolymer, itaconic acid copolymer and derivatives thereof and the like. Can be mentioned.
- the hydrophilic polymer (B) having a sulfo group is not particularly limited, and for example, polyvinyl sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, poly 2-acrylamide-2-methylpropane sulfonic acid, polyisoprene sulfonic acid, and the like. Examples thereof include a polymer of these and polyacrylic acid, ethyl sulfonic acid poly acrylate, butyl sulfonic acid poly acrylate and the like.
- the hydrophilic polymer (B) having an amphoteric functional group is not particularly limited, and is, for example, an allylamine-maleic acid copolymer, a styrene-acrylic acid-acrylic acid dialkylaminoester copolymer, and an aminoethyl methacrylate-methacrylic acid copolymer.
- examples thereof include polymers, methylaminoethyl methacrylate-acrylic acid copolymers, vinylpyridine-maleic acid copolymers, vinylpyridine-itaconic acid copolymers, methylallylamine-itaconic acid copolymers and the like.
- the hydrophilic polymer (B) having a nonionic polar functional group is a hydrophilic polymer having a nonionic hydrophilic group.
- examples of the hydrophilic polymer (B) having a nonionic polar functional group include polyvinylpyrrolidone, a copolymer of vinylpyrrolidone and vinyl acetate, and a copolymer of vinylpyrrolidone and a compound having a vinyl group.
- the hydrophilic polymer (B) may be a hydrophilic polymer (B) having a hydroxyl group.
- Examples of the hydrophilic polymer (B) having a hydroxyl group include polyvinyl alcohol and the like.
- the hydrophilic polymer having a nonionic polar functional group is preferably polyvinylpyrrolidone or polyvinyl alcohol.
- hydrophilic polymer (B) one kind of the above-exemplified one may be used, or two or more kinds of hydrophilic polymers (B) may be used in combination.
- the molecular weight of the hydrophilic polymer (B) is not particularly limited, but the weight average molecular weight is preferably 1000 to 1000000.
- the weight average molecular weight is more preferably 5000 to 800,000, and the excellent moisture resistance and heat resistance of the obtained hydrophilic film are exhibited. Further, it is more preferable that the weight average molecular weight is 5000 to 50,000. As a result, preferable scratch resistance and moisture heat resistance of the obtained hydrophilic coating can be obtained.
- B / (A + B) which is the solid content mass ratio of the hydrophilic polymer (B) to the total solid content mass of the hydrophilic polymer (A) and the hydrophilic polymer (B), is 1.0% to 51.0. % Is preferable.
- the B / (A + B) is more preferably 5.0% to 23.8% from the viewpoint of obtaining preferable moisture and heat resistance of the obtained hydrophilic film. Further, the B / (A + B) is more preferably 5.0% to 38.5% from the viewpoint of obtaining preferable scratch resistance of the obtained hydrophilic film. That is, when the above are put together, the B / (A + B) is most preferably 5.0% to 23.8%.
- the hydrophilization treatment agent according to the present embodiment may contain a surfactant.
- a surfactant By containing the surfactant in the hydrophilizing agent, the dispersibility of each component becomes good, and more uniform coating becomes possible at the time of coating the hydrophilizing agent.
- the surfactant is not particularly limited, and known anionic surfactants, cationic surfactants, nonionic surfactants and the like can be used.
- the hydrophilization treatment agent according to the present embodiment may contain components other than the above as long as the effects of the present invention are not impaired.
- it contains other types of polymer components, solvents such as water, and inorganic salts such as NaCl, Na 2 SO 4 , KCl, KBr, KNO 3 , K 2 SO 4 , CaCl 2 , Si, Ti, and alumina. May be.
- the method for preparing the hydrophilic treatment agent according to the present embodiment is not particularly limited, but for example, the hydrophilic polymer (A), the hydrophilic polymer (B), and other components are blended in a predetermined amount, and if necessary. It can be obtained by adding a solvent such as water and stirring.
- the method for coating the hydrophilic treatment agent is a method in which the hydrophilic treatment agent obtained above is coated on a base material to form a hydrophilic film on the surface of the base material.
- the base material to which the hydrophilizing agent is coated is not particularly limited, and examples thereof include inorganic base materials such as glass and aluminum used for vehicles and organic base materials such as PET, PC and PMMA.
- the coating method of the hydrophilizing treatment agent includes, for example, a pretreatment step, a coating step, and a baking step.
- the pretreatment step may include, for example, a polishing step of polishing the surface of the base material to which the hydrophilization treatment agent is applied, and a cleaning step of cleaning the polishing agent or the like.
- the polishing step can be performed using a known polishing material or a polishing machine.
- abrasives and organic substances remaining on the surface of the base material are removed by a method such as water cleaning or UV cleaning.
- water washing is performed as a washing step, it is preferable to provide a drying step after the washing step.
- the pretreatment step includes a polishing step and a cleaning step, and after polishing by the polishing step, water washing and UV washing may be performed by the washing step.
- the pretreatment step includes a cleaning step and UV cleaning is performed by the cleaning step.
- primer treatment may be performed instead of the cleaning step or after the cleaning step.
- the coating process is a process of applying a hydrophilizing agent to the surface of the base material.
- the coating method is not particularly limited, and examples thereof include a method of immersing the base material in a hydrophilizing agent, a method of using a bar coater, a spin coater, and the like.
- the baking step is a step of baking a base material coated with a hydrophilizing agent.
- the method for coating the hydrophilizing agent according to the present embodiment does not have to include a baking step, but by including the baking step, the substrate and the silanol group contained in the hydrophilizing agent are crosslinked. This is preferable because the reaction is promoted.
- the baking temperature and time are not particularly limited, but the baking can be performed under conditions such as 120 ° C. and 15 min.
- the present invention is not limited to the above embodiments, and the scope of the present invention includes those appropriately modified within the range that does not impair the effects of the present invention. ..
- Example 1 A PTFE rotor having a total length of 20 mm and a diameter of 7 mm was placed in a 500 ml descup, and the raw materials shown in Table 1 were blended by calculating the solid content while slowly rotating the rotor. Then, the hydrophilization treatment agent of Example 1 was prepared by rotating the rotor at 400 rpm for 10 minutes and stirring the rotor.
- Example 2 to 27, Comparative Examples 1 to 9 The hydrophilization treatment agents of Examples 2 to 27 and Comparative Examples 3 to 9 were prepared in the same manner as in Example 1 except that the raw materials to be blended were the raw materials shown in Tables 1 and 2. As the raw materials shown in Tables 1 and 2, the following materials were used. Moreover, a predetermined amount of the surfactant was added in each Example and Comparative Example. The numerical values in Tables 1 and 2 indicate the solid content (parts by mass) of each component, and Comparative Examples 1 and 2 used the commercially available silicate-based hydrophilization treatment agents shown below. Comparative Example 1: Surf Coat AF1 (manufactured by Nippon Paint Surf Chemicals) Comparative Example 2: Excel Pure BD-S01 (manufactured by Chuo Motor Co., Ltd.)
- AMK Amogen K (betaine laurindimethylaminoacetic acid, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 1000W: LAMBIC-1000W (betaine structure and silanol group-containing hydrophilic polymer, manufactured by Osaka Organic Chemical Industry Co., Ltd.) 771W: LAMBIC-771W (betaine structure and silanol group-containing hydrophilic polymer, manufactured by Osaka Organic Chemical Industry Co., Ltd.) 10L: Julimer AC-10L (polyacrylic acid, weight average molecular weight 50,000, manufactured by Toagosei Co., Ltd.) 10H: Julimer AC-10H (polyacrylic acid, weight average molecular weight 800,000, manufactured by Toagosei Co., Ltd.) 10SL: Aron A-10SL (polyacrylic acid, weight average molecular weight 5000, manufactured by Toagosei Co., Ltd.) AN: Charol AN-103P (sodium polyacryl
- Examples 1 to 18, Examples 22 to 27, and Comparative Examples 1 to 9 used a glass base material (S9213 (76 ⁇ 52 mm) manufactured by Matsunami Glass Ind. Co., Ltd.) as a base material to be coated with the hydrophilization treatment agent.
- Example 19 used a PET base material
- Example 20 used a PC base material
- Example 21 used a PMMA base material.
- the glass bases used in Examples 1 to 18, 22 to 27, and Comparative Examples 1 to 9, respectively.
- the material was pretreated with Kiirobin Gold (manufactured by Prostaff) before painting. The pretreatment was performed with a PROXXON micro polisher (with a Japanese wool pad 50 attached) and then with pure water.
- Each of the pretreated base materials was coated by immersing them in the hydrophilization treatment agents of the prepared Examples and Comparative Examples.
- the setting time was 1 min.
- the samples coated on the glass substrates of Examples 1 to 18, Examples 22 to 27, and Comparative Examples 1 to 9 were baked under the conditions of 120 ° C. and 15 min.
- the samples coated on the PET, PC, and PMMA substrates of Examples 19 to 21, respectively, were baked under the conditions of 80 ° C. and 30 min.
- samples coated with the hydrophilization treatment agents of Examples and Comparative Examples were prepared.
- Example resistance test Each sample of Example and Comparative Example was exposed for 24 hours in a moist heat environment of 60 ° C. and 90% RH. Each sample after the test was evaluated by the above-mentioned methods for evaluating hydrophilicity and anti-fog. Further, the samples of Example 2, Comparative Example 1, and Comparative Example 4 were subjected to a moisture resistance test by setting the number of days of exposure under the above conditions to 5 days, 10 days, 15 days, and 20 days, respectively. For each sample after the test, the contact angle (°) was measured by the method in the above hydrophilicity evaluation. The results are shown in FIG.
- the hydrophilic film formed by the hydrophilic treatment agent of Examples has preferable hydrophilicity as compared with the hydrophilic film formed by the hydrophilic treatment agent of Comparative Examples. It was confirmed that anti-fog property was obtained, and that preferable hydrophilicity and anti-fog property were maintained even after the moist heat resistance test and the scratch resistance test.
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Abstract
Description
本実施形態に係る親水化処理剤は、分子内にアルコキシシリル基、及びその加水分解体のうち少なくともいずれかと、ベタイン構造と、を有する親水性ポリマー(A)と、イオン性官能基を有する親水性ポリマー、及び極性官能基を有するノニオン系親水性ポリマーのうち少なくとも一方を有する親水性ポリマー(B)と、を含む。親水性ポリマー(A)と親水性ポリマー(B)とが、親水化処理剤により形成される親水被膜中でイオン架橋ネットワーク、又は双極子-双極子相互作用によるネットワークを形成することで、親水被膜の好ましい耐湿熱性や耐擦り傷性が得られる。
親水性ポリマー(A)は、ベタイン構造を有し、分子内の少なくとも末端に、アルコキシシリル基又はシラノール基を有することが好ましい。親水性ポリマー(A)は、例えば、ベタインモノマーと、アルコキシシリル基又はシラノール基を含有する化合物と、を重合させることで得られる。
親水性ポリマー(B)は、イオン性官能基を有するイオン化可能な親水性ポリマー、及び極性官能基を有するノニオン系親水性ポリマーのうち少なくともいずれかであればよい。親水化処理剤に親水性ポリマー(B)が含有されることで、得られる親水被膜の好ましい耐湿熱性及び耐擦り傷性が得られる。親水性ポリマー(B)は、イオン性官能基を有するイオン化可能な親水性ポリマーであることが好ましい。
本実施形態に係る親水化処理剤は、界面活性剤を含有していてもよい。親水化処理剤に界面活性剤が含有されることで、各成分の分散性が良好となり、親水化処理剤の塗装時において、より均一な塗装が可能となる。上記界面活性剤としては、特に制限されず、公知のアニオン系界面活性剤、カチオン系界面活性剤、ノニオン系界面活性剤等を用いることができる。
本実施形態に係る親水化処理剤は、本発明の効果を阻害しない範囲内で、上記以外の成分を含有していてもよい。例えば、他の種類のポリマー成分、水等の溶媒、及びNaCl、Na2SO4、KCl、KBr、KNO3、K2SO4、CaCl2、Si、Ti、アルミナ等の無機塩を含有していてもよい。
本実施形態に係る親水化処理剤の調製方法としては、特に制限されないが、例えば、上記親水性ポリマー(A)及び親水性ポリマー(B)、並びにその他の成分を所定量配合し、必要に応じて水等の溶媒を加えて撹拌することで得られる。
親水化処理剤の塗装方法は、上記により得られた親水化処理剤を基材に塗装し、基材表面に親水被膜を形成する方法である。親水化処理剤が塗装される対象の基材としては、特に制限されないが、例えば車両等に用いられるガラス、アルミ等の無機基材や、PET、PC、PMMA等の有機基材が挙げられる。
(実施例1)
500mlのデスカップに全長20mm、径7mmのPTFE製回転子を入れ、回転子をゆっくり回転させながら、表1に記載した原料を、固形分含有量を算出して配合した。その後、回転子を400rpmで10分間回転させ撹拌を行うことで実施例1の親水化処理剤を調製した。
配合する原料を表1及び表2に記載した原料としたこと以外は、実施例1と同様にして実施例2~27、比較例3~9の親水化処理剤を調製した。表1及び表2に示す原料としては、以下に示すものを用いた。また、界面活性剤を各実施例及び比較例において所定量添加した。なお、表1及び表2の数値は、各成分の固形分含有量(質量部)を示し、比較例1及び2は、以下に示す市販のシリケート系親水化処理剤を用いた。
比較例1:サーフコート AF1(日本ペイント・サーフケミカルズ社製)
比較例2:エクセルピュアBD-S01(中央自動車社製)
1000W: LAMBIC-1000W(ベタイン構造、及びシラノール基含有親水性ポリマー、大阪有機化学工業株式会社製)
771W: LAMBIC-771W(ベタイン構造、及びシラノール基含有親水性ポリマー、大阪有機化学工業株式会社製)
10L: ジュリマー AC-10L(ポリアクリル酸、重量平均分子量50000、東亜合成株式会社製)
10H: ジュリマー AC-10H(ポリアクリル酸、重量平均分子量800000、東亜合成株式会社製)
10SL: アロン A-10SL(ポリアクリル酸、重量平均分子量5000、東亜合成株式会社製)
AN: シャロール AN-103P(ポリアクリル酸ナトリウム、重量平均分子量10000、第一工業製薬株式会社製)
AH: シャロール AH-103P(ポリアクリル酸アンモニウム、重量平均分子量10000、第一工業製薬株式会社製)
PA-PS: アロン A-12SL(アクリル酸と2-アクリルアミド-2-メチルプロパンスルホン酸との共重合体、重量平均分子量10000、東亞合成株式会社製)
PAA: PAA-1151(アリルアミン-マレイン酸共重合体、ニットボーメディカル株式会社製)
PVA: PVA-105MC(ポリビニルアルコール系樹脂、けん化度:98~99%、重合度:500、株式会社クラレ製)
PVP: ピッツコール K-90L(ポリビニルピロリドン、重量平均分子量1200000、第一工業製薬株式会社製)
NaCl: 塩化ナトリウム(鹿1級、関東化学株式会社製)
KCl: 塩化カリウム(和光1級、富士フイルム和光純薬株式会社製)
KBr: 臭化カリウム(純正1級、純正化学株式会社製)
Si: スノーテックスO(コロイダルシリカ、日産化学製)
Ti: タイノック M-6(酸化チタンゾル、多木化学製)
アルミナ: アルミナゾル 520-A(アルミナゾル、日産化学製)
親水化処理剤を塗装する基材として、実施例1~18、実施例22~27、及び比較例1~9はガラス基材(松浪硝子工業社製 S9213(76×52mm)を用いた。実施例19はPET基材、実施例20はPC基材、実施例21はPMMA基材をそれぞれ用いた。実施例1~18、実施例22~27、及び比較例1~9に用いたガラス基材は、塗装前にキイロビンゴールド(プロスタッフ社製)により前処理した。該前処理は、PROXXONマイクロポリッシャー(日式ウールパッド50装着)を用いて研磨前処理を実施し、その後、純水によりキイロビンゴールドを洗浄し、基材をドライヤーで乾燥させることで行った。実施例19~21に用いた基材は、UV洗浄により前処理を行った。上記前処理後、基材の接触角を以下に示す方法で測定した。接触角が10°以下であることを確認し、各基材に親水化処理剤の塗装を行った。接触角が10°を超える場合、再度、上記前処理を行った。
25℃、50%RH環境下で各サンプル基材表面に5μlの純水を滴下し、接触角を測定した。測定装置は、自動接触角計DM501:協和界面科学製を用いた。以下の基準により親水性を評価し、3を合格とした。
3 接触角が10°以下
2 接触角が10°超~20°以下
1 接触角が20°超
各サンプル基材表面に、25℃、50%RH環境下で呼気をかけた際の曇り具合を以下の基準により評価し、3以上を合格とした。
4 曇らない
3 曇らないが濡れ広がった水膜にややムラがある
2 曇らないが濡れ広がった水膜にかなりムラがある
1 曇る
実施例及び比較例の各サンプル基材表面に不織布(商品名:エリエール プロワイプ ストロングタオル E50、大王製紙社製)を接触させ、500g荷重をかけて100回往復移動させた。試験後の各サンプルを、上記親水性評価及び防曇性評価の方法により評価した。
実施例及び比較例の各サンプルを60℃、90%RHの湿熱環境下で24時間暴露した。試験後の各サンプルを、上記親水性評価及び防曇性評価の方法により評価した。また、実施例2、比較例1、及び比較例4のサンプルについて、上記の条件で曝露した日数をそれぞれ5日間、10日間、15日間、20日間として耐湿熱性試験を行った。試験後の各サンプルについて、上記親水性評価における方法で接触角(°)測定を行った。結果を図1に示した。
Claims (4)
- 分子内にアルコキシシリル基、及びその加水分解体のうち少なくともいずれかと、ベタイン構造と、を有する親水性ポリマー(A)と、
イオン性官能基を有する親水性ポリマー、及び極性官能基を有するノニオン系親水性ポリマーのうち少なくともいずれかである親水性ポリマー(B)と、を含み、
前記親水性ポリマー(A)と前記親水性ポリマー(B)との固形分の合計質量に対する、前記親水性ポリマー(B)の固形分質量比であるB/(A+B)が1.0~51.0%である、親水化処理剤。 - 前記親水性ポリマー(A)は、分子内の少なくとも末端に、アルコキシシリル基、及びシラノール基のうち少なくともいずれかを有する、請求項1に記載の親水化処理剤。
- 前記イオン性官能基のうち、少なくとも一部はアニオン性官能基である、請求項1又は2に記載の親水化処理剤。
- 前記イオン性官能基は、カルボキシ基、及びスルホ基のうちいずれかである、請求項1から3のいずれかに記載の親水化処理剤。
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