WO2015076231A1 - 多官能ウレタン(メタ)アクリレートおよびその硬化性樹脂組成物 - Google Patents
多官能ウレタン(メタ)アクリレートおよびその硬化性樹脂組成物 Download PDFInfo
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- WO2015076231A1 WO2015076231A1 PCT/JP2014/080421 JP2014080421W WO2015076231A1 WO 2015076231 A1 WO2015076231 A1 WO 2015076231A1 JP 2014080421 W JP2014080421 W JP 2014080421W WO 2015076231 A1 WO2015076231 A1 WO 2015076231A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
- C08G18/673—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen containing two or more acrylate or alkylacrylate ester groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3215—Polyhydroxy compounds containing aromatic groups or benzoquinone groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
Definitions
- the present invention is a novel polyfunctional urethane (meth) acrylate, particularly a curable polyfunctional urethane (meth) acrylate oligomer that is cured by active energy rays, a curable resin composition, a cured product thereof, or a resin molded body.
- the present invention relates to a cured coating and a protective coating on a plastic substrate.
- Optical film is generally used as a protective film for optical parts. To prevent scratches on the surface due to handling during production, and to prevent scratches caused by user use when used on the outermost surface. Therefore, a hard coat layer is provided on one side or both sides.
- Examples of scratches caused by user use include scratches where a metal key is rubbed against the surface of a display when a mobile phone such as a smartphone with a display on the front and a metal key are put together in a pocket. It is done. In order to prevent such scratches, the hard coat layer has recently been required to have particularly high scratch resistance and pencil hardness.
- an organic-inorganic hybrid type cured resin composition has been developed for the recent high demands on the scratch resistance and hardness of resin films, but this has a serious problem.
- an inorganic material such as silica in order to increase the hardness, features such as processability inherent in the resin are impaired.
- the coating film hardened using an inorganic material such as silica has properties close to that of glass, and can be said to be a natural consequence of using a cured product against the background of a conventional organic-inorganic hybrid.
- the object of the present invention is to achieve both the inherent processability of the resin and the required performance of recent high hardness coating films.
- the present inventors have found that the above problem can be solved by the oligomer described in Formula 1 below and a curable resin composition using the oligomer.
- the present invention is as follows.
- I. Polyfunctional urethane (meth) acrylate oligomer represented by Formula 1 (In Formula 1, X represents a (meth) acryloyloxy group, A1 and A3 are at least one deisocyanate residue of an alicyclic diisocyanate which is a deisocyanate residue of norbornane diisocyanate, and A2 is metaxylylene. The dehydrated acid residue of glycol, n, m and l are natural numbers).
- II. The polyfunctional urethane (meth) acrylate oligomer according to I above, having a polystyrene-reduced number average molecular weight of 900 to 30,000.
- V A cured product obtained by irradiating the curable resin composition described in III or IV with active energy rays.
- the curable resin composition described in III or IV is applied to a resin substrate so as to have a thickness of 5 to 200 ⁇ m, irradiated with active energy rays, and the substrate surface is irradiated with the above-described V or VI. It is a resin molded body formed by forming a cured product.
- FIG. 7 It is a cross section of the film which formed the hardened
- FIG. 7 It is a cross section of the film which formed the hardened
- the polyfunctional (meth) urethane oligomer of the present invention can be represented by Formula 1.
- X in Formula 1 represents (In Formula 1, X represents a (meth) acryloyloxy group. If 1 in Formula 1 is a natural number, there is no particular limitation, but 3 or more is desirable. If it is less than this, curing shrinkage tends to occur, which is not desirable.
- the upper limit is not particularly limited, but when l is extremely large, the viscosity increases. Therefore, it is preferably less than 50, more preferably less than 30, more preferably less than 10.
- the polystyrene-equivalent number average molecular weight is less than 30,000, desirably less than 10,000, more desirably less than 5,000, and most desirably less than 3,000. It is desirable.
- the molecular weight of the polyfunctional (meth) urethane oligomer of the present invention is 900 or more, desirably 920 or more, more desirably 950 or more, as the number average molecular weight in terms of polystyrene.
- the oligomer of the present invention is preferably a mixture of oligomers having a value of 1 in terms of hardness and suppression of curing shrinkage.
- the viscosity of the polyfunctional (meth) urethane oligomer of the present invention is 5 Pa ⁇ sec to 50 Pa ⁇ sec, preferably 10 Pa ⁇ sec to 35 Pa ⁇ sec, more preferably 19 Pa ⁇ sec in a state diluted in a 90% by mass MEK solution. sec to 25 Pa ⁇ sec.
- n and m in Formula 1 are not particularly limited as long as they are natural numbers, n and m are preferably 3 or less, more preferably 2 or less. If the value is larger than this, curing shrinkage may increase.
- A1 and A3 represent deisocyanate groups of alicyclic diisocyanate. At least one of these is a deisocyanate residue of an alicyclic diisocyanate that is a deisocyanate residue of norbornane diisocyanate.
- Examples of the deisocyanate of the alicyclic isocyanate to be used in combination include dediisocyanate residues such as isophorone diisocyanate, cyclohexane diisocyanate, tetramethylene xylylene diisocyanate, and dicyclohexylmethane diisocyanate hydrogenated xylylene diisocyanate.
- deisocyanate residue of the alicyclic diisocyanate it is particularly desirable that both A1 and A3 are deisocyanate residues (Chemical Formula 4) of norbornane diisocyanate (Chemical Formula 3).
- A2 in Formula 1 is a dehydrated acid residue (Chemical Formula 6) of metaxylylene glycol (Chemical Formula 5).
- the dehydrated acid residues of aliphatic diols and paraxylylene glycol are undesirably low in hardness. Further, in the case of a dehydrated acid residue of orthoxylylene, curing shrinkage becomes remarkable, which is not desirable.
- the polyfunctional urethane (meth) acrylate oligomer of the present invention can be synthesized by the following method. That is, the following raw materials, a polyfunctional urethane (meth) acrylate monomer represented by Formula 2 having one hydroxyl group, (In formula 2, n represents a natural number, and X represents a (meth) acryloyloxy group, that is, CH 2 ⁇ CR—COO— (Formula 8).) (Wherein R is hydrogen or a methyl group)
- a polymerization catalyst is added to the alicyclic diisocyanate and metaxylylene glycol and synthesized by a polycondensation reaction.
- n and m are 3 or less, More preferably, it is 2 or less.
- the curable resin composition using the polyfunctional urethane (meth) acrylate oligomer of the present invention contains 40% by mass or more of the polyfunctional (meth) urethane acrylate represented by the above (formula 1).
- the content is desirably 60% by mass or more, and more desirably 80% by mass or more.
- a (meth) acrylate monomer may be blended as necessary for the purpose of adjusting the viscosity.
- the monomer to be blended include monofunctional monomers [2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, isooctyl (meth) acrylate, benzyl (meth) acrylate, cyclopentanyl (meth) acrylate, cyclohexyl (meth)].
- a solvent may be added to the curable resin composition of the present invention.
- the solvent include highly volatile organic solvents such as ketones such as methyl ethyl ketone and methyl isobutyl ketone, glycol ethers such as methoxypropanol propylene glycol monomethyl ether, and 10 to 50% by mass, preferably 15 to 30%. % By mass.
- the resin composition of the present invention may contain an antioxidant, an ultraviolet absorber, a light stabilizer, a leveling agent, a pigment, an inorganic filler, an organic filler, an organic solvent, and the like.
- cured material of this invention is obtained by apply
- the substrate include a plastic film made of polypropylene resin, polycarbonate resin, polyethylene resin, polyethylene terephthalate resin, polyethylene naphthalate resin, polymethyl methacrylate resin, polystyrene resin, and the like, and the shape is not limited.
- the thickness is usually about 10 to 500 ⁇ m, preferably 20 to 200 ⁇ m.
- the coating method is not particularly limited.
- gravure coating method, reverse coating method, die coating method, lip coating method, blade coating method, roll coating method, roll coating method, knife coating method, curtain coating method, slot orifice method, spray Examples thereof include a coating method and an inkjet method.
- examples of the energy ray supply source include a high-pressure mercury lamp and a metal halide lamp, and the irradiation energy is usually about 100 to 2,000 mJ / cm 2 .
- the supply source and irradiation method are not particularly limited, and the irradiation energy is usually about 10 to 200 kGy. .
- the active energy ray used for obtaining the cured product is an electron beam, it is not necessary, but when it is cured by ultraviolet rays, it is necessary to add a photopolymerization initiator to the curable resin composition.
- a photoinitiator it does not specifically limit and can use a well-known thing.
- the amount of the photopolymerization initiator used is not particularly limited, but is usually about 1 to 10 parts by weight, preferably 1 to 7 parts by weight, more preferably 3 to 100 parts by weight with respect to 100 parts by weight with respect to the curable resin composition. 5 parts by mass is preferable.
- the thickness of the coating film obtained by applying the curable resin composition to a substrate and cured by irradiation with active energy rays is not particularly limited, but is preferably 5 to 200 ⁇ m, more preferably 10 to 100 ⁇ m, and most preferably. 40-100 ⁇ m. If it is thinner than this range, sufficient hardness will not be exhibited. On the other hand, if it is thicker than this, poor curing tends to occur, which is not desirable.
- This curable resin composition was applied to the surface of a polycarbonate film having a thickness of 200 ⁇ m by a bar coater and dried at 50 ° C. for 1 minute.
- the polycarbonate film coated with this curable resin composition was irradiated with ultraviolet rays using a high-pressure mercury lamp at an integrated light quantity of 500 mJ / cm 2 to form a cured product on the polycarbonate film surface. That is, a hard coat film was obtained.
- the obtained hard coat film is cut into a 10 cm square, and the four corners are attached to a glass plate with a cellophane tape, and the surface pencil hardness is based on the provisions of JIS K 5600-5-4 (1999 edition). Measurements were made using a scratch tester. The surface pencil hardness was 8H. The thickness of the cured product was 40 ⁇ m by cross-sectional observation. In addition, as shown in FIG. 1, the defect
- Steel wool (wire diameter: about 0.012 mm), which is ultrafine count # 0000, was brought into contact with the cured product surface on a polycarbonate film placed horizontally at a load of 100 gf / cm 2 , and was subjected to 15 reciprocating wears. The amount of change in haze value (cloudiness) before and after abrasion was determined. There were no scratches before and after the abrasion, and there was no change in the haze value.
- a cured product was formed on the polycarbonate film surface in the same manner as in Example 1 except that 20 parts by mass of methyl ethyl ketone mixed with the hexafunctional urethane acrylate oligomer in Example 1 was changed to 50 parts by mass.
- the thickness of the cured product, the cross-sectional state, the surface pencil hardness, and the amount of change in haze value (haze) before and after abrasion with # 0000 steel wool were measured.
- the thickness was 20 ⁇ m, and there was no defect due to cracking of the cured product in the cross section.
- the surface pencil hardness was 2H. There was no change in haze value.
- Example 2 The procedure was the same as Example 1 except that 100 parts by mass of norbornane diisocyanate in Example 1 was changed to 92.8 parts by mass of isophorone diisocyanate.
- the thickness was 40 ⁇ m, and there was no defect due to cracking of the cured product in the cross section.
- the surface pencil hardness was 4H, but scratches were generated after wear of stee wool and the haze value increased by 1%.
- Example 2 The same procedure as in Example 2 was conducted, except that 100 parts by mass of norbornane diisocyanate in Example 2 was changed to 92.8 parts by mass of isophorone diisocyanate.
- the thickness was 10 ⁇ m, and there was no defect due to cracking of the cured product in the cross section.
- the surface pencil hardness was B. Scratches occurred after the wear of steel wool, and the haze value increased by 1%.
- Example 1 Except for changing 100 parts by weight of norbornane diisocyanate in Example 1 to 109.6 parts by weight of metaxylene diisocyanate, a hexafunctional urethane acrylate oligomer was obtained in the same manner as in Example 1, but it was a solid insoluble in methyl ethyl ketone. The preparation of the curable resin composition and the formation and evaluation of the cured product were abandoned.
- Example 2 The procedure was the same as Example 1 except that 33.5 parts by mass of metaxylylene glycol in Example 1 was changed to 33.5 parts by mass of paraxylene glycol.
- the thickness was 40 ⁇ m, and there was no defect due to cracking of the cured product in the cross section.
- the surface pencil hardness was 2H. There was no change in haze value.
- Example 2 The procedure was the same as Example 1 except that 33.5 parts by mass of metaxylylene glycol in Example 1 was changed to 33.5 parts by mass of orthoxylene glycol. Immediately after the cured product was formed on the polycarbonate film, a crack was generated, and the evaluation such as pencil hardness was abandoned.
- Example 3 The same manner as in Example 1 except that 33.5 parts by mass of metaxylylene glycol in Example 1 was not added. Immediately after the cured product was formed on the polycarbonate film, a crack was generated, and the evaluation such as pencil hardness was abandoned.
- a reactor equipped with a stirrer, a cooling tube, a dropping funnel and a nitrogen introduction tube was charged with 480 parts by mass of methyl isobutyl ketone, and the temperature was raised to 110 ° C. while stirring, and then glycidyl methacrylate 130
- a mixed solution consisting of 15 parts by weight of methyl methacrylate, 304 parts by weight of methyl methacrylate and 15 parts by weight of t-butylperoxy-2-ethylhexanoate (“Perbutyl O” manufactured by Nippon Emulsifier Co., Ltd.) was dropped from the dropping funnel over 3 hours. Thereafter, it was kept at 110 ° C. for 15 hours.
- Example 2 Using this composition, a cured product was formed on the polycarbonate film surface in the same manner as in Example 1. The thickness was 40 ⁇ m. As shown in FIG. 2, cracks occurred when the film formed with the cured product layer of Comparative Example 7 was cut, and defects in the cured product layer associated with the cracks were observed. The surface pencil hardness was HB. There was no change in haze value.
- the pencil hardness and haze value change after the steel wool test were measured in the same manner as in Example 1.
- polycarbonate itself is a material that is very easily damaged. Reflecting this, the surface pencil hardness was 2B, and the haze value was increased by 40% after the steel wool test.
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Abstract
Description
I.式1で表わされる多官能ウレタン(メタ)アクリレートオリゴマー
II.ポリスチレン換算数平均分子量が900~30,000である、上記Iに記載の多官能ウレタン(メタ)アクリレートオリゴマーである。
式1中のlは自然数であれば、特に制約はないが、3以上が望ましい。これより少ないと硬化収縮が起こりやすくなるので望ましくない。上限に特に制約はないが、lが極端に大きくなると、粘度が増大するため、望ましくは50未満、さらに望ましくは30未満、より望ましくは10未満である。また分子量も同様に上限は特にないが、同様の理由でポリスチレン換算数平均分子量として30,000未満、望ましくは10,000未満、より望ましくは5,000未満、最も望ましくは3,000未満とすることが望ましい。
また、本発明の多官能(メタ)ウレタンオリゴマーの分子量は、ポリスチレン換算数平均分子量として900以上、望ましくは920以上、より望ましくは950以上である。
尚、本発明のオリゴマーは複数のlの値を有するオリゴマーの混合物とする方が、硬度と硬化収縮抑制の面で望ましい。
A1,A3は、脂環式ジイソシアネートの脱イソシアネート基を示す。これらのうちすくなとも一つは、ノルボルナンジイソシアネートの脱イソシアネート残基である脂環式ジイソシアネートの脱イソシアネート残基である。併用する脂環式イソシアネートの脱イソシアネートとしては、イソホロンジイソシアネート、シクロヘキサンジイソシアネート、テトラメチレンキシリレンジイソシアネート、ジシクロヘキシルメタンジイソシアネート水添キシリレンジイソシアネート等の脱ジイソアネート残基などが挙げられる。脂環式ジイソシアネートの脱イソシアネート残基としては、特に、A1,A3いずれもが、ノルボルナンジイソシアネート(化3)の脱イソシアネート残基(化4)であることが望ましい。
すなわち、以下の原料、1つの水酸基を有する式2であらわられる多官能ウレタン(メタ)アクリレートモノマー、
および前記脂環式ジイソシアネートとメタキシリレングリコールに、重合触媒を配合して重縮合反応により合成される。なお、nの値については、式1について記載した通りであり、特に制約はないが、望ましくはn、mは3以下、より望ましくは2以下である。
配合するモノマーとしては例えば、単官能性モノマー〔2-エチルヘキシル(メタ)アクリレート、イソデシル(メタ)アクリレート、イソオクチル(メタ)アクリレート、ベンジル(メタ)アクリレート、シクロペンタニル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、ジシクロペンテニル(メタ)アクリレート、イソボニル(メタ)アクリレート等〕、2官能モノマー〔1,3-ブタンジオールジ(メタ)アクリレート、1,4-ブタンジオールジ(メタ)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、ジエチレングリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、トリプロピレングリコールジ(メタ)アクリレート、グリセロールジ(メタ)アクリレート、アリル(メタ)アクリレート、エピクロルヒドリン変性1,6-ヘキサンジオールアクリレート、トリグリセロールジアクリレート等〕、3官能以上の(メタ)アクリレート〔トリメチロールプロパントリ(メタ)アクリレート、エチレンオキサイド変性トリメチロールプロパントリ(メタ)アクリレート、プロピレンオキサイド変性トリメチロールプロパントリ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、エピクロルヒドリン変性トリメチロールプロパントリ(メタ)アクリレート、トリビニルベンゼン、トリビニルシクロヘキサン、ジトリメチロールプロパンテトラ(メタ)アクリレート、グリセロールトリ(メタ)アクリレート等〕などが挙げられ、これらは1種を単独で、または2種以上を組み合わせることができる。
硬化性樹脂組成物における(メタ)アクレートモノマーの配合量は、5~60質量%、望ましくは10~50質量%である。
基材としては、例えば、ポリプロピレン樹脂、ポリカーボネート樹脂、ポリエチレン樹脂、ポリエチレンテレフタレート樹脂、ポリエチレンナフタレート樹脂、ポリメタクリル酸メチル樹脂、ポリスチレン樹脂等からなるプラスチックフィルムが挙げられ、その形状は限定されない。また、基材がフィルム状である場合、その厚みは通常、10~500μm程度、好ましくは20~200μmである。
また、活性エネルギー線が電子線の場合は、供給源や照射方法(スキャン式電子線照射法、カーテン式電子線照射法等)は特に限定されず、その照射エネルギーは通常10~200kGy程度である。
光重合開始剤としては、特に限定されず公知のものを用いることができる。具体的には、例えば、1-ヒドロキシ-シクロヘキシル-フェニルケトン、2,2-ジメトキシ-1,2-ジフェニルエタン-1-オン、1-シクロヘキシルフェニルケトン、2-ヒドロキシ-2-メチル-1-フェニル-プロパン-1-オン、1-[4-(2-ヒドロキシエトキシ)-フェニル]-2-ヒドロキシ-2-メチル-1-プロパン-1-オン、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノプロパン-1-オン、2-ベンジル-2-ジメチルアミノ-1-(4-モルフォリノフェニル)-ブタノン-1、ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド、2,4,6-トリメチルベンゾイル-ジフェニル-フォスフィンオキサイド、4-メチルベンゾフェノン等が挙げられる。これらは1種を単独で用いてもよく、2種以上を混合して用いてもよい。
この範囲より薄いと十分な硬度が発現しない。またこれより厚いと硬化不良が発生しやすくなり望ましくない。
尚、例中の部、%は特に記載のない限り、それぞれ質量部、質量%を意味する。
この硬化性樹脂組成物をバーコータにより、厚さ200μmのポリカーボネートフィルム表面に塗布し、50℃で1分間、乾燥した。この硬化性樹脂組成物を塗布したポリカーボネートフィルムに高圧水銀ランプを用いて積算光量500mJ/cm2にて紫外線照射し、ポリカーボネートフィルム表面に硬化物を形成した。つまりハードコートフィルムを得た。
断面観察により、硬化物の厚みは40μmであった。尚、図1に示す通り、実施例1の硬化物層を形成したフィルムにおいて、割れによる欠損は認められなかった。
超極細の番手#0000であるスチールウール(線径が約0.012mm)を荷重100gf/cm2にて、水平に置かれたポリカーボネートフィルム上の硬化物面に接触させ、15回往復摩耗した後、摩耗前後でのヘイズ値(曇度)の変化量を求めた。摩耗前後での傷の発生はなくヘイズ値変化はなかった。
実施例1と同様にして、硬化物の厚み、断面状態、表面鉛筆硬度、#0000のスチールウールによる摩耗前後のヘイズ値(曇度)変化量を測定した。
厚みは20μm、断面において硬化物の割れによる欠損はなかった。表面鉛筆硬度は2Hであった。ヘイズ値の変化はなかった。
厚みは40μm、断面において硬化物の割れによる欠損はなかった。表面鉛筆硬度は4Hであったが、スチーウール摩耗後に傷が発生し、ヘイズ値は1%増加した。
厚みは10μm、断面において硬化物の割れによる欠損はなかった。ただし表面鉛筆硬度はBであった。スチーウール摩耗後に傷が発生し、ヘイズ値は1%増加した。
厚みは40μm、断面において硬化物の割れによる欠損はなかった。表面鉛筆硬度は2Hであった。ヘイズ値の変化はなかった。
ポリカーボネートフィルム上に硬化物を形成直後、クラックが発生し、鉛筆硬度などの評価を断念した。
このアクリル重合体のメチルイソブチルケトン溶液20質量部(20質量部中アクリル重合体(X-2)は10.0質量部)にジペンタエリスリトールヘキサアクリレート(d-1)45質量部、一次平均粒子径が12nmであり粒子表面に(メタ)アクリロイル基を有するシリカ微粒子である日本アエロジル株式会社製「アエロジルR7200」45質量部、メチルイソブチルケトン80質量部およびプロピレングリコールモノメチルエーテル10質量部を配合し、不揮発分50%のスラリーとしたものをホモジナイザーにより混合分散し、有機無機ハイブリッドである硬化性樹脂組成物を得た。
この組成物を用いて、実施例1と同様にポリカーボネートフィルム表面に硬化物を形成した。
厚みは40μmであった。図2に示すとおり、比較例7の硬化物層を形成したフィルムの切断時にはクラックが発生し、クラックに伴う硬化物層の欠損が認められた。表面鉛筆硬度はHBであった。ヘイズ値の変化はなかった。
これを反映し、表面鉛筆硬度は2B、ヘイズ値はスチールウール試験後40%増加した。
実施例1と比較例4、5、6および参考例との比較により、メタキシリレングリコール脱水酸基が、鉛筆硬度および硬化時のクラック防止性の向上に有用であることがわかる。
さらに、実施例1と比較例7および参考例との比較により、従来の有機無機ハイブリッド型の硬化性樹脂組成物よりも本発明の硬化性樹脂組成物の方が鉛筆硬度および切断時のクラック防止性等の改善効果を示すことが分かる。
Claims (7)
- ポリスチレン換算数平均分子量が900~30,000である、請求項1記載の多官能ウレタン(メタ)アクリレートオリゴマー。
- 請求項1または2に記載の前記多官能ウレタン(メタ)アクリレートオリゴマーを40質量%以上含有する硬化性樹脂組成物。
- 請求項3記載の前記硬化性樹脂組成物100質量部に対し、光重合開始剤を1~10質量部添加されてなる硬化性樹脂組成物。
- 請求項3または請求項4記載の硬化性樹脂組成物に活性エネルギー線を照射してなる硬化物。
- 前記活性エネルギー線が紫外線である請求項5記載の硬化物。
- 請求項3または4記載の硬化性樹脂組成物を樹脂基材に厚さ5~200μmになるよう塗布して、活性エネルギー線を照射して基材表面に、請求項5または6記載の硬化物を形成してなる樹脂成形体。
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CN201480063244.2A CN105814106B (zh) | 2013-11-22 | 2014-11-18 | 多官能团(甲基)丙烯酸氨基甲酸酯及其固化性树脂组合物 |
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TW201527338A (zh) | 2015-07-16 |
TWI659048B (zh) | 2019-05-11 |
KR20160089423A (ko) | 2016-07-27 |
JPWO2015076231A1 (ja) | 2017-03-16 |
US9969839B2 (en) | 2018-05-15 |
US20160297920A1 (en) | 2016-10-13 |
EP3072914A1 (en) | 2016-09-28 |
JP6438410B2 (ja) | 2018-12-12 |
CN105814106B (zh) | 2018-10-09 |
CN105814106A (zh) | 2016-07-27 |
EP3072914A4 (en) | 2017-08-02 |
EP3072914B1 (en) | 2018-05-16 |
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