WO2014010565A1 - 共重合体、単量体組成物、樹脂溶液及び樹脂膜 - Google Patents
共重合体、単量体組成物、樹脂溶液及び樹脂膜 Download PDFInfo
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- WO2014010565A1 WO2014010565A1 PCT/JP2013/068678 JP2013068678W WO2014010565A1 WO 2014010565 A1 WO2014010565 A1 WO 2014010565A1 JP 2013068678 W JP2013068678 W JP 2013068678W WO 2014010565 A1 WO2014010565 A1 WO 2014010565A1
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1812—C12-(meth)acrylate, e.g. lauryl (meth)acrylate
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- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
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- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
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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
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C09D133/00—Coating compositions based on 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C09D133/00—Coating compositions based on 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/068—Copolymers with monomers not covered by C09D133/06 containing glycidyl groups
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- C09D133/00—Coating compositions based on 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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- C09D133/00—Coating compositions based on 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/30—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety
- C08F220/301—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety and one oxygen in the alcohol moiety
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- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
- C08F220/325—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals containing glycidyl radical, e.g. glycidyl (meth)acrylate
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- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
Definitions
- the present invention is used for applications that require excellent transparency and a high refractive index. And a copolymer suitable for forming an optical waveguide.
- Methods for obtaining a high refractive index material include a method of introducing a sulfur atom into an organic compound and a method of compounding (compositing) inorganic particles such as titanium oxide and zirconium oxide with an organic component (such as a polymer).
- a sulfur atom such as titanium oxide and zirconium oxide with an organic component (such as a polymer).
- organic component such as a polymer.
- sulfur atoms when a large amount of sulfur atoms are introduced, there may be a problem of odor, or a problem that stability is lowered by disulfide by-produced from impurities in the raw material.
- compositing inorganic particles and organic components there may be a problem (for example, a decrease in transparency) associated with particle aggregation.
- a fluorene skeleton (9,9-bisphenylfluorene skeleton) has characteristics such as a high refractive index and high heat resistance. Therefore, a high refractive index material using a compound having such a fluorene skeleton. Is being considered.
- Patent Document 1 discloses an epoxy resin having a fluorene skeleton (eg, bisphenol fluorenediglycidyl ether, 9,9-bis (glycidyloxy C 2-4 alkoxyphenyl) fluorene), alkoxysilanes, and a photoacid generator.
- the photopolymerizable resin composition comprised by this is disclosed.
- Patent Document 2 discloses a high refractive index material obtained by curing a polymerizable composition containing a fluorene compound, a metal alkoxide, and a photoacid generator.
- a high refractive index material using a compound having these fluorene skeletons uses a photoacid generator, there is a concern that transparency may be reduced due to the remaining of these.
- a protective film is formed to prevent deterioration and damage of electronic components such as TFT liquid crystal display elements, magnetic head elements, integrated circuit elements, solid-state imaging elements, and insulation between wirings arranged in layers is performed.
- a photosensitive resin composition has been used for forming an interlayer insulating film, forming a microlens or a microlens array, and forming an optical waveguide. This photosensitive resin composition is required to have a high refractive index from the viewpoint of excellent transparency and light collection.
- Patent Document 3 discloses a copolymer containing hydroxyphenyl (meth) acrylate and an epoxy group-containing unsaturated compound as polymerization components and a quinonediazide group-containing compound. However, this has a low refractive index and insufficient transparency.
- the present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a copolymer having both excellent transparency and a high refractive index.
- the present inventor has obtained a repeating unit derived from phenylphenyl (meth) acrylate, a repeating unit derived from a hydroxyphenyl group-containing unsaturated compound, and an epoxy group-containing unsaturated compound. It has been found that a copolymer containing a repeating unit of the above can solve the above problems, and has completed the present invention. That is, the present invention is shown by the following [1] to [13].
- a copolymer comprising a repeating unit derived from phenylphenyl (meth) acrylate, a repeating unit derived from a hydroxyphenyl group-containing unsaturated compound, and a repeating unit derived from an epoxy group-containing unsaturated compound.
- the copolymer according to [1] which contains 5 mol% to 60 mol% of units.
- a copolymer having both excellent transparency and a high refractive index can be provided.
- the resin film formed from this copolymer is used to form protective films and interlayer insulation films for electronic components such as liquid crystal display elements, integrated circuit elements, solid-state imaging elements, microlenses or microlens arrays, and optical waveguides. It can utilize suitably for.
- (meth) acrylate means methacrylate or acrylate.
- the copolymer of the present invention is obtained by polymerizing phenylphenyl (meth) acrylate [also called biphenyl (meth) acrylate], a hydroxyphenyl group-containing unsaturated compound, and an epoxy group-containing unsaturated compound. It includes a repeating unit derived from (meth) acrylate, a repeating unit derived from a hydroxyphenyl group-containing unsaturated compound, and a repeating unit derived from an epoxy group-containing unsaturated compound.
- the repeating unit derived from phenylphenyl (meth) acrylate is preferably contained in an amount of 5 mol% to 70 mol%, and the repeating unit derived from a hydroxyphenyl group-containing unsaturated compound is preferably contained in an amount of 5 mol% to 80 mol%.
- the repeating unit derived from an epoxy group-containing unsaturated compound is preferably contained in an amount of 5 mol% to 60 mol%. If the repeating unit derived from phenylphenyl (meth) acrylate is less than 5 mol%, the effect of improving the refractive index may not be obtained.
- the repeating unit derived from the hydroxyphenyl group-containing unsaturated compound is less than 5 mol%, the curing reaction with the epoxy group may be insufficient, whereas if it exceeds 80 mol%, the transparency tends to decrease. . If the repeating unit derived from the epoxy group-containing unsaturated compound is less than 5 mol%, the curing reaction with the hydroxyl group may be insufficient, while if it exceeds 60 mol%, the refractive index tends to decrease.
- the copolymer of the present invention contains 10 mol% to 65 mol% of repeating units derived from phenylphenyl (meth) acrylate, 10 mol% to 70 mol% of repeating units derived from a hydroxyphenyl group-containing unsaturated compound, and contains an epoxy group. 10 to 50 mol% of repeating units derived from unsaturated compounds are contained. In particular, when used as a photosensitive resin, it is preferable that 50 mol% to 70 mol% of repeating units derived from a hydroxyphenyl group-containing unsaturated compound are included from the viewpoint of imparting good alkali solubility to the resin film.
- phenylphenyl (meth) acrylate in the present invention include o-phenylphenyl acrylate, m-phenylphenyl acrylate, p-phenylphenyl acrylate, o-phenylphenyl methacrylate, m-phenylphenyl methacrylate and p-phenylphenyl methacrylate. Is mentioned. These may be used alone or in combination of two or more. Among these, p-phenylphenyl (meth) acrylate is preferable in that it has less steric hindrance during the polymerization reaction.
- the hydroxyphenyl group-containing unsaturated compound in the present invention is a compound having a hydroxyphenyl group and an ethylenic double bond, and specific examples thereof include o-hydroxyphenyl acrylate, m-hydroxyphenyl acrylate, p-hydroxyphenyl.
- examples thereof include hydroxyphenyl (meth) acrylates such as acrylate, o-hydroxyphenyl methacrylate, m-hydroxyphenyl methacrylate, and p-hydroxyphenyl methacrylate, hydroxystyrene, isopropenylphenol, hydroxyphenyl (meth) acrylamide, and vinyl hydroxyphenyl ether. These may be used alone or in combination of two or more.
- p-hydroxyphenyl acrylate and p-hydroxyphenyl methacrylate are preferable in terms of light transmittance and heat resistance when formed into a resin film.
- the epoxy group-containing unsaturated compound in the present invention is a compound having an epoxy group and an ethylenic double bond, and specific examples thereof include glycidyl acrylate, glycidyl methacrylate, glycidyl ⁇ -ethyl acrylate, acrylic acid- 3,4-epoxybutyl, methacrylic acid-3,4-epoxybutyl, ⁇ -ethylacrylic acid-3,4-epoxybutyl, acrylic acid-6,7-epoxyheptyl, methacrylic acid-6,7-epoxyheptyl, Aliphatic acids such as ⁇ -ethylacrylic acid-6,7-epoxyheptyl, vinyl glycidyl ether, allyl glycidyl ether, isopropenyl glycidyl ether, o-vinyl benzyl glycidyl ether, m-vinyl benzyl glycid
- epoxy group-containing (meth) acrylic acid esters are preferable, and are selected from glycidyl methacrylate and 3,4-epoxycyclohexylmethyl methacrylate from the viewpoints of polymerization reactivity, light transmittance when used as a resin film, and heat resistance. More preferred are epoxy group-containing (meth) acrylic acid esters.
- polymerizable monomers may be used in combination as long as the effects of the present invention are not impaired.
- examples of such polymerizable monomers include styrene, benzyl (meth) acrylate, vinyl toluene, and vinyl benzoic acid.
- the weight average molecular weight (Mw) of the copolymer of the present invention is preferably 5,000 to 60,000, more preferably 8,000 to 50,000 in terms of polystyrene. If the weight average molecular weight is less than 5,000, the resin film may become brittle, while if it exceeds 60,000, the resin may not be dissolved in the solvent.
- the value of the molecular weight of the copolymer in this invention is measured on the following conditions using gel permeation chromatography (GPC), and is calculated in polystyrene conversion.
- the weight average molecular weight and molecular weight distribution are calculated with the calculation range from the rise time of GPC to 15 minutes.
- the polymerization reaction for obtaining the copolymer of the present invention is not particularly limited, and a conventional radical polymerization method conventionally performed can be applied. Specifically, phenylphenyl (meth) acrylate, hydroxyphenyl group-containing unsaturated compound and epoxy group-containing unsaturated compound are dissolved in a desired ratio in a reaction solvent, and a polymerization initiator is mixed to 70 to 100 ° C. By approximately 5 to 10 hours of polymerization, a copolymer can be obtained.
- Bulk polymerization may be performed using only phenylphenyl (meth) acrylate, a hydroxyphenyl group-containing unsaturated compound, an epoxy group-containing unsaturated compound, and a polymerization initiator without using a reaction solvent.
- reaction solvent examples include methanol, ethanol, 1-propanol, isopropyl alcohol, butanol, ethylene glycol, acetone, methyl ethyl ketone, methyl isobutyl ketone, tetrahydrofuran, dioxane, toluene, xylene, ethyl acetate, isopropyl acetate, normal propyl acetate, Butyl acetate, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, 3-methoxybutyl acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl Ether, ethylene glycol monoethyl ether, 3-methoxybutanol, diethylene glycol monoethyl alcohol
- polymerization initiator examples include 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2-butyronitrile), 2,2′-azobisisobutyronitrile, dimethyl -2,2'-azobisisobutyrate, azo initiators such as 1,1'-azobis (cyclohexane-1-carbonitrile), benzoyl peroxide, lauryl peroxide, octanoyl peroxide, acetyl peroxide Examples thereof include organic peroxides such as oxide, di-t-butyl peroxide, t-butylcumyl peroxide, dicumyl peroxide, t-butylperoxyacetate, and t-butylperoxybenzoate.
- azo initiators such as 1,1'-azobis (cyclohexane-1-carbonitrile), benzoyl peroxide, lauryl peroxide, octanoyl peroxide, ace
- the phenylphenyl (meth) acrylate is 1% by mass to 45% by mass
- the hydroxyphenyl group-containing unsaturated compound is 1% by mass to 43% by mass
- epoxy It contains 1% to 40% by weight of the group-containing unsaturated compound, 45% to 90% by weight of the reaction solvent, and 0.2% to 20% by weight of the polymerization initiator.
- the ratio of phenylphenyl (meth) acrylate, hydroxyphenyl group-containing unsaturated compound, epoxy group-containing unsaturated compound corresponds to the ratio of the repeating units in the copolymer of the present invention, and these compounds
- the reaction solvent is 500 to 700 parts by mass and the polymerization initiator is 5 to 15 parts by mass.
- This monomer composition may contain the other polymerizable monomer mentioned above.
- the monomer composition of the present invention can be used as a raw material for the above-described copolymer.
- a copolymer obtained by polymerizing this monomer composition has both excellent transparency and a high refractive index.
- the resin film formed from this copolymer is used to form protective films and interlayer insulation films for electronic components such as liquid crystal display elements, integrated circuit elements, solid-state imaging elements, microlenses or microlens arrays, and optical waveguides. It can utilize suitably for.
- the resin film can be obtained by a commonly used method such as applying and drying a resin solution containing the copolymer of the present invention.
- the resin solution of the present invention can be obtained, for example, by reacting the monomer composition of the present invention at 70 to 100 ° C. for 5 to 10 hours and adjusting the solid content concentration to 20 to 50% by mass by distillation or the like. it can.
- the solid content concentration of the resin solution is preferably 25 to 45% by mass.
- Example 1 In a flask equipped with a reflux condenser and a stirrer, 69 parts by weight of phenylphenyl methacrylate, 17 parts by weight of p-hydroxyphenyl methacrylate, 14 parts by weight of glycidyl methacrylate, 600 parts by weight of propylene glycol monomethyl ether acetate and dimethyl 2,2′-azobis After charging 10 parts by mass of (2-methylpropionate) and purging with nitrogen, the liquid temperature was raised to 80 ° C. while stirring and the reaction was carried out at 80 ° C. for 6 hours.
- the disappearance of the monomer was confirmed by gel permeation chromatography, the temperature was raised to 100 ° C., and aging was performed for 30 minutes. Propylene glycol monomethyl ether acetate was removed by distillation at 100 ° C. under reduced pressure, and the solid content concentration was adjusted to 30% by mass to obtain a resin solution.
- the weight average molecular weight (Mw) of the copolymer contained in the resin solution was 8,800, and the molecular weight distribution (Mw / Mn) was 3.6.
- Example 2 In a flask equipped with a reflux condenser and a stirrer, 38 parts by weight of phenylphenyl methacrylate, 47 parts by weight of p-hydroxyphenyl methacrylate, 15 parts by weight of glycidyl methacrylate, 600 parts by weight of propylene glycol monomethyl ether acetate and dimethyl 2,2′-azobis 10 parts by mass of (2-methylpropionate) was charged and reacted in the same manner as in Example 1 to obtain a resin solution.
- the weight average molecular weight (Mw) of the copolymer contained in the resin solution was 8,400, and the molecular weight distribution (Mw / Mn) was 3.5.
- Example 3 In a flask equipped with a reflux condenser and a stirrer, 13 parts by weight of phenylphenyl methacrylate, 70 parts by weight of p-hydroxyphenyl methacrylate, 16 parts by weight of glycidyl methacrylate, 600 parts by weight of propylene glycol monomethyl ether acetate and dimethyl 2,2′-azobis 10 parts by mass of (2-methylpropionate) was charged and reacted in the same manner as in Example 1 to obtain a resin solution.
- the weight average molecular weight (Mw) of the copolymer contained in the resin solution was 8,000, and the molecular weight distribution (Mw / Mn) was 3.2.
- the resin solutions obtained in Examples 2 and 3 were applied on a silicon wafer to a thickness of 1 ⁇ m, dried in an oven at 80 ° C. for 30 minutes, and then 2.38 wt% tetra When the alkali solubility was evaluated by immersing in an aqueous methylammonium hydroxide solution for 90 seconds, the resin film of Example 3 was completely dissolved, but the resin film of Example 2 was slightly undissolved.
- the resin films formed from the copolymers obtained in Examples 1 to 3 have both excellent transparency and a high refractive index.
- the resin film formed from the copolymer obtained in Comparative Example 1 was found to have a low refractive index and poor transparency.
- a resin film containing a large number of repeating units derived from p-hydroxyphenyl methacrylate has good alkali solubility.
- the copolymer with good alkali solubility can be suitably used as a resin component of the photosensitive resin composition.
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Description
しかし、これらのフルオレン骨格を有する化合物を用いた高屈折率材料は、光酸発生剤を用いているため、これらの残存による透明性の低下が懸念される。
即ち、本発明は、以下の[1]~[13]で示される。
[1]フェニルフェニル(メタ)アクリレート由来の繰り返し単位と、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位と、エポキシ基含有不飽和化合物由来の繰り返し単位とを含むことを特徴とする共重合体。
[2]前記フェニルフェニル(メタ)アクリレート由来の繰り返し単位を5mol%~70mol%、前記ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位を5mol%~80mol%及び前記エポキシ基含有不飽和化合物由来の繰り返し単位を5mol%~60mol%含むことを特徴とする[1]に記載の共重合体。
[3]前記ヒドロキシフェニル基含有不飽和化合物が、ヒドロキシフェニル(メタ)アクリレートであることを特徴とする[1]又は[2]に記載の共重合体。
[4]前記エポキシ基含有不飽和化合物が、エポキシ基含有(メタ)アクリル酸エステルであることを特徴とする[1]~[3]のいずれかに記載の共重合体。
[5]前記エポキシ基含有(メタ)アクリル酸エステルが、メタクリル酸グリシジル及び3,4-エポキシシクロヘキシルメチルメタクリレートからなる群から選択されることを特徴とする[4]に記載の共重合体。
[6]フェニルフェニル(メタ)アクリレートを1質量%~45質量%、ヒドロキシフェニル基含有不飽和化合物を1質量%~43質量%、エポキシ基含有不飽和化合物を1質量%~40質量%、反応溶媒を45質量%~90質量%、及び重合開始剤を0.2質量%~20質量%含むことを特徴とする単量体組成物。
[7]前記ヒドロキシフェニル基含有不飽和化合物が、ヒドロキシフェニル(メタ)アクリレートであることを特徴とする[6]に記載の単量体組成物。
[8]前記エポキシ基含有不飽和化合物が、エポキシ基含有(メタ)アクリル酸エステルであることを特徴とする[6]又は[7]に記載の単量体組成物。
[9]前記エポキシ基含有(メタ)アクリル酸エステルが、メタクリル酸グリシジル及び3,4-エポキシシクロヘキシルメチルメタクリレートからなる群から選択されることを特徴とする[8]に記載の単量体組成物。
[10][6]~[9]のいずれかに記載の単量体組成物を重合して得られることを特徴とする共重合体。
[11][1]~[5]及び[10]のいずれかに記載の共重合体を含むことを特徴とする樹脂溶液。
[12][6]~[9]のいずれかに記載の単量体組成物を70~100℃で5~10時間反応させ、固形分濃度を20~50質量%に調整したことを特徴とする樹脂溶液。
[13][11]又は[12]に記載の樹脂溶液を基板上に塗布し、乾燥して得られることを特徴とする樹脂膜。
なお、本願の明細書及び特許請求の範囲において、(メタ)アクリレートとは、メタクリレート又はアクリレートを意味する。
本発明の共重合体は、フェニルフェニル(メタ)アクリレート[ビフェニル(メタ)アクリレートとも呼ばれる]と、ヒドロキシフェニル基含有不飽和化合物と、エポキシ基含有不飽和化合物とを重合させて得られる、フェニルフェニル(メタ)アクリレート由来の繰り返し単位と、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位と、エポキシ基含有不飽和化合物由来の繰り返し単位とを含むものである。共重合体において、フェニルフェニル(メタ)アクリレート由来の繰り返し単位は5mol%~70mol%含まれることが好ましく、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位は5mol%~80mol%含まれることが好ましく、エポキシ基含有不飽和化合物由来の繰り返し単位は5mol%~60mol%含まれることが好ましい。フェニルフェニル(メタ)アクリレート由来の繰り返し単位が5mol%未満であると、屈折率を向上させる効果が得られない場合があり、一方、70mol%を超えると、得られる共重合体の溶剤溶解性が低下し、濁りが生じたり取り扱いが困難になる場合がある。ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位が5mol%未満であると、エポキシ基との硬化反応が不十分になる場合があり、一方、80mol%を越えると、透明性が低下する傾向がある。エポキシ基含有不飽和化合物由来の繰り返し単位が5mol%未満であると、水酸基との硬化反応が不十分になる場合があり、一方、60mol%を超えると、屈折率が低下する傾向がある。本発明の共重合体は、より好ましくは、フェニルフェニル(メタ)アクリレート由来の繰り返し単位が10mol%~65mol%、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位が10mol%~70mol%、エポキシ基含有不飽和化合物由来の繰り返し単位が10mol%~50mol%含まれる。特に、感光性樹脂として用いる場合には、樹脂膜に良好なアルカリ溶解性を付与する観点から、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位は50mol%~70mol%含まれることが好ましい。
カラム:ショウデックス(登録商標) LF-804+LF-804
カラム温度:40℃
展開溶媒:テトラヒドロフラン
検出器:示差屈折計(ショウデックス(登録商標) RI-101)
流速:1mL/min
反応溶媒を使用せずに、フェニルフェニル(メタ)アクリレート、ヒドロキシフェニル基含有不飽和化合物、エポキシ基含有不飽和化合物及び重合開始剤だけで塊状重合を行ってもよい。
樹脂膜は、本発明の共重合体を含む樹脂溶液を塗布して乾燥させるなど、通常用いられる方法により得ることができる。本発明の樹脂溶液は、例えば、本発明の単量体組成物を70~100℃で5~10時間反応させ、蒸留等により固形分濃度を20~50質量%に調整することにより得ることができる。樹脂溶液の固形分濃度は好ましくは25~45質量%である。
<実施例1>
還流冷却器及び攪拌機を備えたフラスコに、フェニルフェニルメタクリレート69質量部、p-ヒドロキシフェニルメタクリレート17質量部、メタクリル酸グリシジル14質量部、プロピレングリコールモノメチルエーテルアセテート600質量部及びジメチル2,2’-アゾビス(2-メチルプロピオネート)10質量部を仕込み、窒素置換した後、攪拌しながら液温を80℃まで上昇させ、80℃で6時間反応させた。ゲル・パーミエーション・クロマトグラフィーによりモノマーの消失を確認し、100℃まで昇温して30分間エージングを行った。100℃、減圧下でプロピレングリコールモノメチルエーテルアセテートを蒸留により取り除き、固形分濃度を30質量%に調整して樹脂溶液を得た。
樹脂溶液中に含まれる共重合体の重量平均分子量(Mw)は8,800、分子量分布(Mw/Mn)は3.6であった。
還流冷却器及び攪拌機を備えたフラスコに、フェニルフェニルメタクリレート38質量部、p-ヒドロキシフェニルメタクリレート47質量部、メタクリル酸グリシジル15質量部、プロピレングリコールモノメチルエーテルアセテート600質量部及びジメチル2,2’-アゾビス(2-メチルプロピオネート)10質量部を仕込み、実施例1と同様に反応を行って樹脂溶液を得た。
樹脂溶液中に含まれる共重合体の重量平均分子量(Mw)は8,400、分子量分布(Mw/Mn)は3.5であった。
還流冷却器及び攪拌機を備えたフラスコに、フェニルフェニルメタクリレート13質量部、p-ヒドロキシフェニルメタクリレート70質量部、メタクリル酸グリシジル16質量部、プロピレングリコールモノメチルエーテルアセテート600質量部及びジメチル2,2’-アゾビス(2-メチルプロピオネート)10質量部を仕込み、実施例1と同様に反応を行って樹脂溶液を得た。
樹脂溶液中に含まれる共重合体の重量平均分子量(Mw)は8,000、分子量分布(Mw/Mn)は3.2であった。
還流冷却器及び攪拌機を備えたフラスコに、p-ヒドロキシフェニルメタクリレート56質量部、メタクリル酸グリシジル44質量部及びプロピレングリコールモノメチルエーテルアセテート600質量部及びジメチル2,2’-アゾビス(2-メチルプロピオネート)8質量部を仕込み、実施例1と同様に反応を行って樹脂溶液を得た。
樹脂溶液中に含まれる共重合体の重量平均分子量(Mw)は8,800、分子量分布(Mw/Mn)は2.8であった。
実施例1~3及び比較例1で得られた樹脂溶液を、ガラス上に厚さ3μmになるよう塗布し、オーブンにて80℃で30分乾燥した後、250℃で3時間加熱した。得られた樹脂膜付きガラスについて、分光光度計を使用して波長400nmでの透過率を測定した。結果を表1に示した。
実施例1~3及び比較例1で得られた樹脂溶液を、シリコンウエハー上に厚さ1μmになるように塗布し、オーブンにて80℃で30分乾燥した。得られた樹脂膜付きシリコンウエハーについて、卓上エリプソメーター FE-5000Sを使用して波長589nmでの屈折率を測定した。結果を表1に示した。
Claims (13)
- フェニルフェニル(メタ)アクリレート由来の繰り返し単位と、ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位と、エポキシ基含有不飽和化合物由来の繰り返し単位とを含むことを特徴とする共重合体。
- 前記フェニルフェニル(メタ)アクリレート由来の繰り返し単位を5mol%~70mol%、前記ヒドロキシフェニル基含有不飽和化合物由来の繰り返し単位を5mol%~80mol%及び前記エポキシ基含有不飽和化合物由来の繰り返し単位を5mol%~60mol%含むことを特徴とする請求項1に記載の共重合体。
- 前記ヒドロキシフェニル基含有不飽和化合物が、ヒドロキシフェニル(メタ)アクリレートであることを特徴とする請求項1又は2に記載の共重合体。
- 前記エポキシ基含有不飽和化合物が、エポキシ基含有(メタ)アクリル酸エステルであることを特徴とする請求項1~3のいずれか一項に記載の共重合体。
- 前記エポキシ基含有(メタ)アクリル酸エステルが、メタクリル酸グリシジル及び3,4-エポキシシクロヘキシルメチルメタクリレートからなる群から選択されることを特徴とする請求項4に記載の共重合体。
- フェニルフェニル(メタ)アクリレートを1質量%~45質量%、ヒドロキシフェニル基含有不飽和化合物を1質量%~43質量%、エポキシ基含有不飽和化合物を1質量%~40質量%、反応溶媒を45質量%~90質量%、及び重合開始剤を0.2質量%~20質量%含むことを特徴とする単量体組成物。
- 前記ヒドロキシフェニル基含有不飽和化合物が、ヒドロキシフェニル(メタ)アクリレートであることを特徴とする請求項6に記載の単量体組成物。
- 前記エポキシ基含有不飽和化合物が、エポキシ基含有(メタ)アクリル酸エステルであることを特徴とする請求項6又は7に記載の単量体組成物。
- 前記エポキシ基含有(メタ)アクリル酸エステルが、メタクリル酸グリシジル及び3,4-エポキシシクロヘキシルメチルメタクリレートからなる群から選択されることを特徴とする請求項8に記載の単量体組成物。
- 請求項6~9のいずれか一項に記載の単量体組成物を重合して得られることを特徴とする共重合体。
- 請求項1~5及び10のいずれか一項に記載の共重合体を含むことを特徴とする樹脂溶液。
- 請求項6~9のいずれか一項に記載の単量体組成物を70~100℃で5~10時間反応させ、固形分濃度を20~50質量%に調整したことを特徴とする樹脂溶液。
- 請求項11又は12に記載の樹脂溶液を基板上に塗布し、乾燥して得られることを特徴とする樹脂膜。
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| US14/413,570 US9260554B2 (en) | 2012-07-12 | 2013-07-08 | Copolymer, monomer composition, resin solution, and resin film |
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| KR1020157003245A KR101711309B1 (ko) | 2012-07-12 | 2013-07-08 | 공중합체, 단량체 조성물, 수지 용액 및 수지막 |
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| JP2010250271A (ja) * | 2009-03-26 | 2010-11-04 | Fujifilm Corp | 感活性光線性又は感放射線性樹脂組成物、これを用いたレジスト膜、及び、パターン形成方法 |
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| JP4524944B2 (ja) * | 2001-03-28 | 2010-08-18 | Jsr株式会社 | 感放射線性樹脂組成物、その層間絶縁膜およびマイクロレンズの形成への使用、ならびに層間絶縁膜およびマイクロレンズ |
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| JP4723272B2 (ja) | 2004-04-02 | 2011-07-13 | 大阪瓦斯株式会社 | 光重合性樹脂組成物およびその硬化物 |
| JP4644857B2 (ja) | 2005-07-22 | 2011-03-09 | 昭和電工株式会社 | 感光性樹脂組成物 |
| JP4516150B1 (ja) * | 2009-02-27 | 2010-08-04 | 昭和高分子株式会社 | 感光性樹脂組成物 |
| KR20120109487A (ko) * | 2009-11-30 | 2012-10-08 | 히다치 가세고교 가부시끼가이샤 | 감광성 수지 조성물, 감광성 수지 니스, 감광성 수지 필름, 및 감광성 수지 경화물 |
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| JP2010250271A (ja) * | 2009-03-26 | 2010-11-04 | Fujifilm Corp | 感活性光線性又は感放射線性樹脂組成物、これを用いたレジスト膜、及び、パターン形成方法 |
| JP2011162624A (ja) * | 2010-02-08 | 2011-08-25 | Mitsubishi Rayon Co Ltd | 低複屈折性の共重合体及び成形体 |
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