WO2024135629A1 - 変性スチレン系エラストマー及び変性スチレン系エラストマーの製造方法 - Google Patents
変性スチレン系エラストマー及び変性スチレン系エラストマーの製造方法 Download PDFInfo
- Publication number
- WO2024135629A1 WO2024135629A1 PCT/JP2023/045353 JP2023045353W WO2024135629A1 WO 2024135629 A1 WO2024135629 A1 WO 2024135629A1 JP 2023045353 W JP2023045353 W JP 2023045353W WO 2024135629 A1 WO2024135629 A1 WO 2024135629A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- based elastomer
- maleic anhydride
- styrene
- modified styrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/46—Reaction with unsaturated dicarboxylic acids or anhydrides thereof, e.g. maleinisation
-
- 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
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
- C08F297/04—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
Definitions
- This disclosure relates to modified styrene-based elastomers and methods for producing modified styrene-based elastomers.
- Styrene-based elastomers which are composed of copolymers of aromatic vinyl compounds and conjugated diene compounds, or hydrogenated products thereof, are used in a variety of applications. It is known that styrene-based elastomers can be acid-modified with maleic anhydride or the like to impart properties such as adhesiveness and affinity (see, for example, Patent Document 1, etc.).
- Acid-modified styrene-based elastomers are generally produced by kneading a styrene-based elastomer with maleic anhydride.
- Commercially available acid-modified styrene-based elastomers do not have sufficient compatibility with other components such as thermosetting resins, and there is a need to improve compatibility. Therefore, the present disclosure aims to provide a modified styrene-based elastomer that has excellent compatibility with other components and a method for producing the modified styrene-based elastomer.
- One aspect of the present disclosure relates to the following modified styrenic elastomer and a method for producing the modified styrenic elastomer.
- a method for producing a modified styrene-based elastomer comprising the steps of adding a radical generator to a mixed solution obtained by dissolving a styrene-based elastomer and maleic anhydride in a solvent under a nitrogen atmosphere, and reacting the styrene-based elastomer with the maleic anhydride, thereby obtaining a modified styrene-based elastomer having a graft ratio of the maleic anhydride of 1.5 mass% or more.
- graft ratio is 1.5 to 10.0 mass%.
- the present disclosure provides a modified styrene-based elastomer that has excellent compatibility with other components and a method for producing the modified styrene-based elastomer.
- the term “process” includes not only independent processes, but also processes that cannot be clearly distinguished from other processes as long as the intended effect of the process is achieved.
- the term “layer” includes structures with shapes formed over the entire surface as well as structures with shapes formed on only a portion of the surface when observed in a plan view.
- a numerical range indicated using “ ⁇ ” indicates a range including the numerical values before and after " ⁇ " as the minimum and maximum values, respectively.
- the upper or lower limit of a numerical range of a certain stage may be replaced with the upper or lower limit of a numerical range of another stage.
- the upper or lower limit of the numerical range may be replaced with a value shown in the examples.
- Solid content refers to the non-volatile content of the resin composition excluding volatile substances (water, solvent, etc.).
- solid content refers to components other than the solvent that remain without volatilization during drying of the resin composition described later, and also includes components that are liquid, syrup-like, or waxy at room temperature (25°C).
- domain refers to one of the phases that make up a phase-separated structure.
- One method for evaluating the compatibility of polymer blends is to measure the domain size of microphase separation that exists when observing the cross section of a film molded product.
- the cross section of a film molded product can be observed using an atomic force microscope (AFM), scanning electron microscope (SEM), transmission electron microscope (TEM), etc.
- the modified styrene-based elastomer according to the present embodiment has a graft ratio of maleic anhydride of 1.5 mass % or more.
- the modified styrene-based elastomer according to this embodiment can be produced by reacting a styrene-based elastomer with maleic anhydride, and has a succinic anhydride group based on maleic anhydride in the side chain.
- the styrene-based elastomer may be a copolymer having a structural unit derived from a styrene-based compound and a structural unit derived from a conjugated diene compound.
- styrene-based compounds include styrene, ⁇ -methylstyrene, p-methylstyrene, and p-tert-butylstyrene.
- styrene, ⁇ -methylstyrene, and 4-methylstyrene are preferred, with styrene being more preferred.
- conjugated diene compounds include 1,3-butadiene, 2-methyl-1,3-butadiene (isoprene), 1,3-pentadiene (piperylene), 1-phenyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 3,4-dimethyl-1,3-hexadiene, and 4,5-diethyl-1,3-octadiene.
- 1,3-butadiene and isoprene are preferred from the standpoint of availability and productivity.
- the styrene-based elastomer may be a hydrogenated styrene-based elastomer in which at least a portion of the structural units derived from a conjugated diene compound are hydrogenated.
- Examples of hydrogenated styrene-butadiene-styrene block copolymers (SEBS) and hydrogenated styrene-isoprene-styrene block copolymers are mentioned.
- SEBS products include, for example, the Tuftec (registered trademark) H series manufactured by Asahi Kasei Corporation, the Septon (registered trademark) series manufactured by Kuraray Co., Ltd., and the Kraton (registered trademark) G Polymer series manufactured by Kraton Polymer Japan Co., Ltd.
- the acid value of the modified styrene-based elastomer may be 20 to 120 mgKOH/g, 25 to 100 mgKOH/g, 30 to 90 mgKOH/g, or 35 to 80 mgKOH/g, in order to further increase compatibility.
- the graft ratio of maleic anhydride in the modified styrene-based elastomer may be 1.5 mass% or more, 1.8 mass% or more, 2.0 mass% or more, 2.5 mass% or more, or 3.0 mass% or more from the viewpoint of further improving compatibility.
- the graft ratio of maleic anhydride may be 10.0 mass% or less, 9.0 mass% or less, 8.0 mass% or less, or 7.0 mass% or less from the viewpoint of improving dielectric properties.
- the graft ratio may be 1.5 to 10.0 mass%, 1.8 to 10.0 mass%, 2.0 to 9.0 mass%, 2.5 to 8.0 mass%, or 3.0 to 7.0 mass%.
- the graft ratio can be calculated using the acid value of the modified styrene-based elastomer.
- the acid value and graft ratio in this specification are values calculated by the method described in the Examples.
- the method for producing a modified styrene-based elastomer includes a step of adding a radical generator to a mixture of a styrene-based elastomer and maleic anhydride dissolved in a solvent under a nitrogen atmosphere to react the styrene-based elastomer with the maleic anhydride.
- the reaction temperature may be 60 to 100°C, 65 to 95°C, or 70 to 90°C. This makes it possible to obtain a modified styrene-based elastomer under milder conditions than in the conventional method of melt-kneading a styrene-based elastomer and maleic anhydride at a high temperature of 170°C or higher to react the styrene-based elastomer with maleic anhydride, and also makes it possible to increase the graft rate of maleic anhydride. After the reaction, unreacted maleic anhydride may be removed by extraction in order to suppress side reactions.
- the amount of maleic anhydride per 100 parts by mass of styrene-based elastomer may be 5 parts by mass or more, 8 parts by mass or more, 10 parts by mass or more, or 15 parts by mass or more from the viewpoint of increasing the graft rate, and may be 50 parts by mass or less, 45 parts by mass or less, 40 parts by mass or less, or 35 parts by mass or less from the viewpoint of suppressing side reactions.
- the amount of maleic anhydride may be 5 to 50 parts by mass, 8 to 45 parts by mass, 10 to 40 parts by mass, or 15 to 35 parts by mass.
- Examples of the radical generator that can be used include organic peroxides and azo compounds.
- Examples of the organic peroxides include dicumyl peroxide, benzoyl peroxide, 2-butanone peroxide, tert-butyl perbenzoate, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, bis(tert-butylperoxyisopropyl)benzene, and tert-butyl hydroperoxide.
- Examples of the azo compounds include 2,2'-azobis(2-methylpropanenitrile), 2,2'-azobis(2-methylbutanenitrile), and 1,1'-azobis(cyclohexanecarbonitrile).
- Solvents include, for example, butyl cellosolve, ethylene glycol monomethyl ether, propylene glycol monomethyl ether, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, mesitylene, methoxyethyl acetate, ethoxyethyl acetate, butoxyethyl acetate, and ethyl acetate. These may be used alone or in combination of two or more. Among these, toluene, xylene, and propylene glycol monomethyl ether are preferred from the viewpoint of solubility.
- a resin composition can be prepared by mixing the modified styrene-based elastomer according to this embodiment with other components (e.g., a thermosetting resin, a curing accelerator, a filler, a flame retardant, etc.)
- the modified styrene-based elastomer according to this embodiment has reactivity with thermosetting resins, and the cured product of the resin composition has excellent heat resistance, strength, etc.
- thermosetting resin examples include epoxy resins, cyanate ester resins, acrylic resins, silicone resins, phenolic resins, maleimide resins, thermosetting polyimide resins, polyurethane resins, melamine resins, and urea resins. These may be used alone or in combination of two or more.
- epoxy resins include bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol S type epoxy resins, alicyclic epoxy resins, aliphatic linear epoxy resins, phenol novolac type epoxy resins, cresol novolac type epoxy resins, bisphenol A novolac type epoxy resins, phenol aralkyl type epoxy resins, naphthol novolac type epoxy resins, naphthol aralkyl type epoxy resins, xylene novolac type epoxy resins, bifunctional biphenyl type epoxy resins, biphenyl aralkyl type epoxy resins, dicyclopentadiene type epoxy resins, and dihydroanthracene type epoxy resins.
- the amount of the thermosetting resin in the resin composition is not particularly limited.
- the amount of the thermosetting resin may be 10 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, or 40 parts by mass or more, or 95 parts by mass or less, 90 parts by mass or less, 85 parts by mass or less, or 80 parts by mass or less, per 100 parts by mass of the total amount of the modified styrene-based elastomer and the thermosetting resin.
- the curing accelerator examples include various imidazole compounds, which are latent heat curing agents, BF3 amine complexes, phosphorus-based curing accelerators, etc. When a curing accelerator is added, imidazole compounds and phosphorus-based curing accelerators are preferred from the viewpoints of storage stability of the resin composition, handling of the semi-cured resin composition, and solder heat resistance of the cured product.
- filler examples include silica, alumina, titanium oxide, mica, beryllia, barium titanate, potassium titanate, strontium titanate, calcium titanate, aluminum carbonate, magnesium hydroxide, aluminum hydroxide, aluminum silicate, calcium carbonate, calcium silicate, magnesium silicate, silicon nitride, boron nitride, calcined clay, talc, aluminum borate, and silicon carbide. These may be used alone or in combination of two or more.
- the particle size of the filler may be, for example, 0.01 to 20 ⁇ m or 0.1 to 10 ⁇ m.
- particle size refers to the average particle size, and is the particle size at the point corresponding to 50% volume when a cumulative frequency distribution curve is calculated based on particle size, with the total volume of the particles being 100%.
- the average particle size can be measured using a particle size distribution measuring device that uses a laser diffraction scattering method.
- a coupling agent can be used in combination to improve the dispersibility of the filler and its adhesion to the organic component.
- the coupling agent there are no particular limitations on the coupling agent, and for example, various silane coupling agents, titanate coupling agents, etc. can be used. These may be used alone or in combination of two or more.
- the amount of coupling agent used there are also no particular limitations on the amount of coupling agent used, and for example, it may be 0.1 to 5 parts by mass or 0.5 to 3 parts by mass per 100 parts by mass of the filler used. Within this range, there is little deterioration in various properties, and it becomes easier to effectively utilize the features of the filler.
- the so-called integral blending method may be used, in which the coupling agent is added after the filler is blended into the resin composition, but it is preferable to use a filler that has been surface-treated in advance with a coupling agent by a dry or wet method. By using this method, the characteristics of the filler can be more effectively expressed.
- the flame retardant is not particularly limited, but a bromine-based flame retardant, a phosphorus-based flame retardant, a metal hydroxide, etc. are preferably used.
- the bromine-based flame retardant include brominated epoxy resins, brominated additive flame retardants, and brominated reaction flame retardants containing unsaturated double bond groups.
- the phosphorus-based flame retardant include aromatic phosphate esters, phosphonate esters, phosphinate esters, and phosphazene compounds.
- the metal hydroxide flame retardant include magnesium hydroxide and aluminum hydroxide.
- the resin composition may be diluted with a solvent as necessary.
- the solvent is not particularly limited, but can be selected taking into consideration the boiling point and volatility during film formation.
- solvents include solvents with relatively low boiling points such as methanol, ethanol, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, methyl ethyl ketone, acetone, methyl isobutyl ketone, toluene, and xylene. Solvents can be used alone or in combination of two or more.
- the resin composition of this embodiment can be obtained by uniformly dispersing and mixing the above-mentioned components, and the preparation means, conditions, etc. are not particularly limited.
- a method can be used in which the various components in the specified amounts are thoroughly and uniformly stirred and mixed using a mixer or the like, then kneaded using a mixing roll, extruder, kneader, roll, extruder, etc., and the resulting kneaded product is cooled and pulverized.
- the kneading method is also not particularly limited.
- resin film The resin composition according to the present embodiment can be used to produce a resin film.
- resin film refers to an uncured or semi-cured film-like resin composition.
- the method for producing the resin film is not limited, but for example, the resin film can be obtained by applying the resin composition onto a supporting substrate and drying the formed resin layer.
- the resin composition can be applied onto a supporting substrate using a kiss coater, roll coater, comma coater, or the like, and then dried in a heated drying oven or the like at a temperature of, for example, 70 to 250°C, preferably 70 to 200°C, for 1 to 30 minutes, preferably 3 to 15 minutes. This makes it possible to obtain a resin film in which the resin composition is in a semi-cured state.
- the semi-cured resin film can be further heated in a heating furnace at a temperature of, for example, 170 to 250°C, preferably 185 to 230°C, for 60 to 150 minutes to thermally cure the resin film.
- the thickness of the resin film according to this embodiment is not particularly limited, but is preferably 1 to 200 ⁇ m, more preferably 2 to 180 ⁇ m, and even more preferably 3 to 150 ⁇ m. By setting the thickness of the resin film within the above range, it is easy to achieve both a thin printed wiring board obtained using the resin film according to this embodiment and good high-frequency characteristics.
- the supporting substrate is not particularly limited, but is preferably at least one selected from the group consisting of glass, metal foil, and PET film. Providing a supporting substrate for the resin film tends to improve storage properties and handling properties when used in the manufacture of printed wiring boards.
- the resin film according to this embodiment can take the form of a support with a resin layer, which includes a resin layer containing the resin composition according to this embodiment and a supporting substrate, and may be peeled off from the supporting substrate when in use.
- a prepreg can be produced using the resin composition according to this embodiment.
- the resin composition according to this embodiment is applied to a fiber substrate, which is a reinforcing substrate, and the applied resin composition is dried to obtain a prepreg.
- the prepreg may be obtained by impregnating the fiber substrate with the resin composition according to this embodiment and then drying the impregnated resin composition.
- the fiber substrate to which the resin composition is attached is heated and dried in a drying oven at a temperature of 80 to 200 ° C. for 1 to 30 minutes to obtain a prepreg in which the resin composition is semi-cured. From the viewpoint of good moldability, it is preferable to coat or impregnate the fiber substrate with the resin composition so that the resin content in the prepreg after drying is 30 to 90 mass %.
- the reinforcing substrate for the prepreg is not limited, but a sheet-like fiber substrate is preferred.
- the sheet-like fiber substrate include inorganic fibers such as E glass, NE glass, S glass, and Q glass; and organic fibers such as polyimide, polyester, and tetrafluoroethylene.
- the sheet-like fiber substrate those having shapes such as woven fabric, nonwoven fabric, and chopped strand mat can be used.
- a laminate having a resin layer containing the cured product of the above-mentioned resin composition and a conductor layer can be provided.
- a metal-clad laminate can be produced by using the above-mentioned resin film or the above-mentioned prepreg.
- the method for producing the metal-clad laminate is not limited, but for example, one or more resin films or prepregs according to this embodiment are stacked, metal foil that will become a conductor layer is placed on at least one surface, and then, for example, heated and pressed at a temperature of 170 to 250°C, preferably 185 to 230°C, and a pressure of 0.5 to 5.0 MPa for 60 to 150 minutes, to obtain a metal-clad laminate having metal foil on at least one surface of the resin layer or prepreg that will become an insulating layer.
- Heating and pressing can be performed, for example, under conditions of a vacuum degree of 10 kPa or less, preferably 5 kPa or less, and from the viewpoint of increasing efficiency, it is preferable to perform the heating and pressing in a vacuum. Heating and pressing are preferably performed for 30 minutes from the start to the end of molding.
- Multilayer printed wiring board According to the present embodiment, it is possible to provide a multilayer printed wiring board including a resin layer containing the cured product of the above-mentioned resin composition and a circuit layer.
- the upper limit of the number of circuit layers is not particularly limited, and may be 3 to 20 layers.
- the multilayer printed wiring board can also be manufactured using, for example, the above-mentioned resin film, prepreg, or metal-clad laminate.
- a multilayer printed wiring board can be produced by first placing a resin film on one or both sides of a core board on which a circuit has been formed, or by placing a resin film between multiple core boards, and then bonding each layer by pressure and heat lamination or pressure and heat press molding, and then performing circuit formation processing such as laser hole drilling, drilling, metal plating, metal etching, etc. If the resin film has a supporting substrate, the supporting substrate can be peeled off before the resin film is placed on or between the core boards, or it can be peeled off after the resin layer is attached to the core board.
- Example 1 In a 2L flask equipped with a cooling tube, a nitrogen inlet tube, a thermocouple, and a stirrer, 950g of xylene, 100g of hydrogenated styrene-based thermoplastic elastomer (manufactured by Asahi Kasei Corporation, product name "Tuftec H1041"), and 12.5g of maleic anhydride (FUJIFILM Wako Pure Chemical Industries, Ltd.) were added, and the mixture was stirred at 80°C for 0.5 hours, followed by nitrogen bubbling at a flow rate of 0.5 cm 3 /L for 1.0 hour.
- Example 2 The reaction was carried out in the same manner as in Example 1, except that the amount of maleic anhydride was changed to 17 g and the amount of benzoyl peroxide was changed to 6.5 g, to obtain a modified styrene-based elastomer (A2) having succinic anhydride groups.
- A2 modified styrene-based elastomer having succinic anhydride groups.
- Example 3 The reaction was carried out in the same manner as in Example 1, except that the amount of maleic anhydride was changed to 34 g and the amount of benzoyl peroxide was changed to 13 g, to obtain a modified styrene-based elastomer (A3) having succinic anhydride groups.
- Example 4 The reaction was carried out in the same manner as in Example 1, except that the amount of maleic anhydride was changed to 8 g and the amount of benzoyl peroxide was changed to 3 g, to obtain a modified styrene-based elastomer (A4) having succinic anhydride groups.
- Example 1 The reaction was carried out in the same manner as in Example 1, except that the amount of maleic anhydride was changed to 4 g and the amount of benzoyl peroxide was changed to 1.5 g, to obtain a modified styrene-based elastomer (A5) having succinic anhydride groups.
- the acid value of the modified styrene-based elastomer is a value derived from two carboxyl groups generated by hydrolysis of the succinic anhydride group.
- Graft ratio [acid value (mg KOH/g)/molecular weight of KOH (mg/mol)] ⁇ 0.5 ⁇ molecular weight of maleic anhydride (g/mol) ⁇ 100(%)
- thermosetting resin As the thermosetting resin, a thermosetting resin (B1) (xylene-novolac type epoxy resin, manufactured by Mitsubishi Chemical Corporation, trade name "YX7700”) and a thermosetting resin (B2) (bismaleimide resin, manufactured by DIC Corporation, trade name "NE-X-9470S”) were prepared, and "Tuftec H1041" was prepared as an unmodified styrene-based elastomer.
- the modified styrene-based elastomer or the unmodified styrene-based elastomer and the thermosetting resin were mixed in the mass ratio shown in Table 2 or Table 3 to prepare a resin composition. 0.05 mL of the resin composition was attached to a preparation to form a resin layer.
- the resin layer was covered with a cover glass and left to stand at 25 ° C. for 24 hours.
- the domain size of the resin layer after standing was measured using an optical microscope (magnification 20 times). Compatibility was evaluated as follows: domain size less than 10 ⁇ m was rated as "A”, domain size 10 ⁇ m or more but less than 20 ⁇ m was rated as "B”, domain size 20 ⁇ m or more but less than 50 ⁇ m was rated as "C”, domain size 50 ⁇ m or more but less than 100 ⁇ m was rated as "D”, and domain size 100 ⁇ m or more was rated as "E”. The smaller the domain size, the better the compatibility.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Graft Or Block Polymers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
Description
[1]無水マレイン酸のグラフト率が1.5質量%以上である、変性スチレン系エラストマー。
[2]前記グラフト率が、1.5~10.0質量%である、上記[1]に記載の変性スチレン系エラストマー。
[3]前記グラフト率が、1.8~10.0質量%である、上記[1]に記載の変性スチレン系エラストマー。
[4]スチレン系エラストマー及び無水マレイン酸を溶剤に溶解した混合液に、窒素雰囲気下でラジカル発生剤を添加し、前記スチレン系エラストマーに前記無水マレイン酸を反応させる工程を備え、前記無水マレイン酸のグラフト率が1.5質量%以上である変性スチレン系エラストマーを得る、変性スチレン系エラストマーの製造方法。
[5]前記グラフト率が、1.5~10.0質量%である、上記[4]に記載の方法。
[6]前記グラフト率が、1.8~10.0質量%である、上記[4]に記載の方法。
[7]前記ラジカル発生剤が、有機過酸化物又はアゾ化合物である、上記[4]~[6]のいずれかに記載の方法。
[8]前記溶剤が、トルエン、キシレン、及びプロピレングリコールモノメチルエーテルからなる群より選ばれる少なくとも1種を含む、上記[4]~[7]のいずれかに記載の方法。
本実施形態に係る変性スチレン系エラストマーは、無水マレイン酸のグラフト率が1.5質量%以上である。変性スチレン系エラストマーにおける無水マレイン酸のグラフト率を高めることで、他の成分(特に熱硬化性樹脂)との相溶性を向上することができる。
本実施形態に係る変性スチレン系エラストマーと、他の成分(例えば、熱硬化性樹脂、硬化促進剤、フィラー、難燃剤等)とを混合して、樹脂組成物を作製することができる。本実施形態に係る変性スチレン系エラストマーは、熱硬化性樹脂に対する反応性を有しており、該樹脂組成物の硬化物は、耐熱性、強度等に優れている。
熱硬化性樹脂としては、例えば、エポキシ樹脂、シアネートエステル樹脂、アクリル樹脂、シリコーン樹脂、フェノール樹脂、マレイミド樹脂、熱硬化型ポリイミド樹脂、ポリウレタン樹脂、メラミン樹脂、及びユリア樹脂が挙げられる。これらは1種を単独で又は2種以上を組み合わせて用いることができる。
硬化促進剤としては、例えば、潜在性の熱硬化剤である各種イミダゾール化合物、BF3アミン錯体、リン系硬化促進剤等が挙げられる。硬化促進剤を配合する場合、樹脂組成物の保存安定性、半硬化の樹脂組成物の取扱性、及び硬化物のはんだ耐熱性の観点から、イミダゾール化合物及びリン系硬化促進剤が好ましい。
フィラーとしては、例えば、シリカ、アルミナ、酸化チタン、マイカ、ベリリア、チタン酸バリウム、チタン酸カリウム、チタン酸ストロンチウム、チタン酸カルシウム、炭酸アルミニウム、水酸化マグネシウム、水酸化アルミニウム、ケイ酸アルミニウム、炭酸カルシウム、ケイ酸カルシウム、ケイ酸マグネシウム、窒化ケイ素、窒化ホウ素、焼成クレー、タルク、ホウ酸アルミニウム、及び炭化ケイ素が挙げられる。これらは1種を単独で用いても、2種以上を併用してもよい。
難燃剤としては特に限定されないが、臭素系難燃剤、リン系難燃剤、金属水酸化物等が好適に用いられる。臭素系難燃剤としては、例えば、臭素化エポキシ樹脂、臭素化添加型難燃剤、不飽和二重結合基含有の臭素化反応型難燃剤等が挙げられる。リン系難燃剤としては、例えば、芳香族系リン酸エステル、ホスホン酸エステル、ホスフィン酸エステル、ホスファゼン化合物等が挙げられる。金属水酸化物難燃剤としては、例えば、水酸化マグネシウム、水酸化アルミニウム等が挙げられる。
本実施形態に係る樹脂組成物を用いて、樹脂フィルムを作製することができる。なお、樹脂フィルムとは未硬化又は半硬化のフィルム状の樹脂組成物を指す。
本実施形態に係る樹脂組成物を用いてプリプレグを作製することができる。本実施形態に係る樹脂組成物を補強基材である繊維基材に塗工し、塗工された樹脂組成物を乾燥させてプリプレグを得ることができる。また、プリプレグは、繊維基材を本実施形態に係る樹脂組成物に含浸した後、含浸された樹脂組成物を乾燥させて得てもよい。具体的には、樹脂組成物が付着した繊維基材を、乾燥炉中で通常、80~200℃の温度で、1~30分間加熱乾燥することで、樹脂組成物が半硬化したプリプレグを得られる。良好な成形性の観点からは、繊維基材に対する樹脂組成物の付着量は、乾燥後のプリプレグ中の樹脂含有率として30~90質量%となるように塗工又は含浸することが好ましい。
本実施形態によれば、上述の樹脂組成物の硬化物を含む樹脂層と、導体層とを有する積層板を提供することができる。例えば、上記樹脂フィルム又は上記プリプレグを用い、金属張積層板を製造することができる。
本実施形態によれば、上述の樹脂組成物の硬化物を含む樹脂層と、回路層とを備える多層プリント配線板を提供することができる。回路層の数の上限値は特に限定されず、3層~20層であってもよい。多層プリント配線板は、例えば、上記樹脂フィルム、プリプレグ又は金属張積層板を用いて製造することもできる。
(実施例1)
冷却管、窒素導入管、熱電対、及び攪拌機を備えた2Lのフラスコに、キシレン950g、水添スチレン系熱可塑性エラストマー(旭化成株式会社製、商品名「タフテックH1041」)100g、及び無水マレイン酸(富士フイルム和光純薬株式会社)12.5gを投入し、80℃で0.5時間攪拌した後、0.5cm3/Lの流量で窒素バブリングを1.0時間行った。次いで、過酸化ベンゾイル(富士フイルム和光純薬株式会社)4.8gを添加し、80℃で窒素バブリングをしながら6.0時間攪拌し、反応を行った。反応液から未反応の無水マレイン酸をイソプロピルアルコールにより3回抽出し、濃縮した。濃縮物を70℃で真空乾燥し、無水コハク酸基を有する変性スチレン系エラストマー(A1)を得た。
無水マレイン酸の量を17gに変更し、過酸化ベンゾイルの量を6.5gに変更した以外は実施例1と同様に反応を行い、無水コハク酸基を有する変性スチレン系エラストマー(A2)を得た。
無水マレイン酸の量を34gに変更し、過酸化ベンゾイルの量を13gに変更した以外は実施例1と同様に反応を行い、無水コハク酸基を有する変性スチレン系エラストマー(A3)を得た。
無水マレイン酸の量を8gに変更し、過酸化ベンゾイルの量を3gに変更した以外は実施例1と同様に反応を行い、無水コハク酸基を有する変性スチレン系エラストマー(A4)を得た。
無水マレイン酸の量を4gに変更し、過酸化ベンゾイルの量を1.5gに変更した以外は実施例1と同様に反応を行い、無水コハク酸基を有する変性スチレン系エラストマー(A5)を得た。
市販の無水コハク酸基を有する変性スチレン系エラストマー(A6)(旭化成株式会社、商品名「タフテックM1913」)を準備した。
実施例及び比較例の変性スチレン系エラストマーの酸価及び無水マレイン酸のグラフト率を以下の手順で測定した。結果を表1に示す。
変性スチレン系エラストマー約1g及びキシレン200gを80℃で混合した液に、蒸留水0.5mLを加えた後、還流温度で1時間撹拌し、無水コハク酸基を加水分解した。混合液を80℃まで下げ、少量のフェノールフタレインを添加した後、0.1Mの水酸化可リム(KOH)含有エタノール溶液を30秒間色が消えなくなるまで滴下した。変性スチレン系エラストマーの量と滴下したKOHの量とから酸価(mgKOH/g)を測定した。変性スチレン系エラストマーの酸価は、無水コハク酸基が加水分解されて生成した2個のカルボキシ基に由来する値である。
変性スチレン系エラストマーの無水マレイン酸のグラフト率は、酸価、KOHの分子量、及び無水マレイン酸の分子量を下記式に導入して算出した。
グラフト率(質量%)=[酸価(mgKOH/g)/KOHの分子量(mg/mol)]×0.5×無水マレイン酸の分子量(g/mol)×100(%)
熱硬化性樹脂として、熱硬化性樹脂(B1)(キシレン-ノボラック型エポキシ樹脂、三菱ケミカル株式会社製、商品名「YX7700」)及び熱硬化性樹脂(B2)(ビスマレイミド樹脂、DIC株式会社製、商品名「NE-X-9470S」)を準備し、未変性スチレン系エラストマーとして、「タフテックH1041」を準備した。変性スチレン系エラストマー又は未変性スチレン系エレストマーと、熱硬化性樹脂とを表2又は表3に示す質量比で混合し、樹脂組成物を調製した。0.05mLの樹脂組成物をプレパラート上に付着させ、樹脂層を形成した。樹脂層上にカバーガラスを被せた状態で、25℃で24時間静置した。光学顕微鏡(倍率20倍)を用いて、静置後の樹脂層のドメインサイズを測定した。相溶性について、ドメインサイズが10μm未満の場合を「A」、10μm以上20μm未満の場合を「B」、20μm以上50μm未満の場合を「C」、50μm以上100μm未満の場合を「D」、100μm以上の場合を「E」と評価した。ドメインサイズが小さいほど、相溶性に優れることを意味する。
Claims (8)
- 無水マレイン酸のグラフト率が1.5質量%以上である、変性スチレン系エラストマー。
- 前記グラフト率が、1.5~10.0質量%である、請求項1に記載の変性スチレン系エラストマー。
- 前記グラフト率が、1.8~10.0質量%である、請求項1に記載の変性スチレン系エラストマー。
- スチレン系エラストマー及び無水マレイン酸を溶剤に溶解した混合液に、窒素雰囲気下でラジカル発生剤を添加し、前記スチレン系エラストマーに前記無水マレイン酸を反応させる工程を備え、
前記無水マレイン酸のグラフト率が1.5質量%以上である変性スチレン系エラストマーを得る、変性スチレン系エラストマーの製造方法。 - 前記グラフト率が、1.5~10.0質量%である、請求項4に記載の方法。
- 前記グラフト率が、1.8~10.0質量%である、請求項4に記載の方法。
- 前記ラジカル発生剤が、有機過酸化物又はアゾ化合物である、請求項4に記載の方法。
- 前記溶剤が、トルエン、キシレン、及びプロピレングリコールモノメチルエーテルからなる群より選ばれる少なくとも1種を含む、請求項4~7のいずれか一項に記載の方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020257023117A KR20250129685A (ko) | 2022-12-22 | 2023-12-18 | 변성 스타이렌계 엘라스토머 및 변성 스타이렌계 엘라스토머의 제조 방법 |
| JP2024566054A JPWO2024135629A1 (ja) | 2022-12-22 | 2023-12-18 | |
| CN202380086841.6A CN120380032A (zh) | 2022-12-22 | 2023-12-18 | 改性苯乙烯类弹性体及改性苯乙烯类弹性体的制造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-205786 | 2022-12-22 | ||
| JP2022205786 | 2022-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024135629A1 true WO2024135629A1 (ja) | 2024-06-27 |
Family
ID=91588546
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/045354 Ceased WO2024135630A1 (ja) | 2022-12-22 | 2023-12-18 | 樹脂組成物 |
| PCT/JP2023/045353 Ceased WO2024135629A1 (ja) | 2022-12-22 | 2023-12-18 | 変性スチレン系エラストマー及び変性スチレン系エラストマーの製造方法 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/045354 Ceased WO2024135630A1 (ja) | 2022-12-22 | 2023-12-18 | 樹脂組成物 |
Country Status (5)
| Country | Link |
|---|---|
| JP (2) | JPWO2024135629A1 (ja) |
| KR (2) | KR20250129685A (ja) |
| CN (2) | CN120380032A (ja) |
| TW (2) | TW202444776A (ja) |
| WO (2) | WO2024135630A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025009565A1 (ja) * | 2023-07-06 | 2025-01-09 | 株式会社レゾナック | 硬化性樹脂組成物、硬化性フィルム、及び積層フィルム |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4578429A (en) * | 1984-08-31 | 1986-03-25 | Shell Oil Company | Selectively hydrogenated block copolymers modified with acid compounds or derivatives |
| JPH06226924A (ja) * | 1993-02-03 | 1994-08-16 | Mitsubishi Petrochem Co Ltd | 積層体 |
| JP2000017121A (ja) * | 1998-07-02 | 2000-01-18 | Mitsubishi Chemicals Corp | 樹脂組成物 |
| JP2012250356A (ja) * | 2011-05-31 | 2012-12-20 | Kuraray Co Ltd | 多層構造体及びその製造方法 |
| JP2017125176A (ja) * | 2016-08-31 | 2017-07-20 | 三井化学株式会社 | 低誘電性樹脂組成物、硬化物、ドライフィルム、フィルム、プリプレグ、金属張積層板、プリント配線基板および電子機器 |
| WO2018128111A1 (ja) * | 2017-01-05 | 2018-07-12 | 日本製紙株式会社 | 変性ポリオレフィン系樹脂 |
| JP2019104832A (ja) * | 2017-12-13 | 2019-06-27 | ユニチカ株式会社 | 水性分散体 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08259849A (ja) * | 1995-03-24 | 1996-10-08 | Daicel Chem Ind Ltd | プライマー組成物、および難接着プラスチック素材の加工方法 |
| JP5763461B2 (ja) | 2011-07-29 | 2015-08-12 | アロン化成株式会社 | 熱可塑性エラストマー組成物 |
| WO2017057708A1 (ja) * | 2015-09-30 | 2017-04-06 | 味の素株式会社 | 封止用樹脂組成物 |
| WO2018116967A1 (ja) * | 2016-12-22 | 2018-06-28 | 東亞合成株式会社 | 接着剤組成物並びにこれを用いたカバーレイフィルム、ボンディングシート、銅張積層板及び電磁波シールド材 |
| JPWO2022071150A1 (ja) * | 2020-10-02 | 2022-04-07 |
-
2023
- 2023-12-18 KR KR1020257023117A patent/KR20250129685A/ko active Pending
- 2023-12-18 CN CN202380086841.6A patent/CN120380032A/zh active Pending
- 2023-12-18 JP JP2024566054A patent/JPWO2024135629A1/ja active Pending
- 2023-12-18 CN CN202380087104.8A patent/CN120380033A/zh active Pending
- 2023-12-18 WO PCT/JP2023/045354 patent/WO2024135630A1/ja not_active Ceased
- 2023-12-18 JP JP2024566055A patent/JPWO2024135630A1/ja active Pending
- 2023-12-18 KR KR1020257023118A patent/KR20250127100A/ko active Pending
- 2023-12-18 WO PCT/JP2023/045353 patent/WO2024135629A1/ja not_active Ceased
- 2023-12-20 TW TW112149638A patent/TW202444776A/zh unknown
- 2023-12-20 TW TW112149642A patent/TW202438547A/zh unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4578429A (en) * | 1984-08-31 | 1986-03-25 | Shell Oil Company | Selectively hydrogenated block copolymers modified with acid compounds or derivatives |
| JPH06226924A (ja) * | 1993-02-03 | 1994-08-16 | Mitsubishi Petrochem Co Ltd | 積層体 |
| JP2000017121A (ja) * | 1998-07-02 | 2000-01-18 | Mitsubishi Chemicals Corp | 樹脂組成物 |
| JP2012250356A (ja) * | 2011-05-31 | 2012-12-20 | Kuraray Co Ltd | 多層構造体及びその製造方法 |
| JP2017125176A (ja) * | 2016-08-31 | 2017-07-20 | 三井化学株式会社 | 低誘電性樹脂組成物、硬化物、ドライフィルム、フィルム、プリプレグ、金属張積層板、プリント配線基板および電子機器 |
| WO2018128111A1 (ja) * | 2017-01-05 | 2018-07-12 | 日本製紙株式会社 | 変性ポリオレフィン系樹脂 |
| JP2019104832A (ja) * | 2017-12-13 | 2019-06-27 | ユニチカ株式会社 | 水性分散体 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025009565A1 (ja) * | 2023-07-06 | 2025-01-09 | 株式会社レゾナック | 硬化性樹脂組成物、硬化性フィルム、及び積層フィルム |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024135630A1 (ja) | 2024-06-27 |
| TW202444776A (zh) | 2024-11-16 |
| JPWO2024135630A1 (ja) | 2024-06-27 |
| JPWO2024135629A1 (ja) | 2024-06-27 |
| CN120380033A (zh) | 2025-07-25 |
| CN120380032A (zh) | 2025-07-25 |
| TW202438547A (zh) | 2024-10-01 |
| KR20250129685A (ko) | 2025-08-29 |
| KR20250127100A (ko) | 2025-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI814832B (zh) | 樹脂組成物、預浸體、覆金屬箔疊層板、樹脂片及印刷配線板 | |
| CN111285980B (zh) | 无卤素低介电树脂组合物,使用其所制得的预浸渍片、金属箔积层板及印刷电路板 | |
| TWI830741B (zh) | 樹脂組成物及其應用 | |
| KR101776560B1 (ko) | 수지 조성물, 프리프레그, 금속박 피복 적층판, 수지 복합 시트, 및 프린트 배선판 | |
| TWI615438B (zh) | 一種聚苯醚樹脂組合物及其在高頻電路基板中的應用 | |
| TWI589686B (zh) | Low-dielectric phosphorus-containing flame retardant resin composition and its preparation method and application | |
| WO2007094359A1 (ja) | セミipn型複合体の熱硬化性樹脂組成物並びにこれを用いたワニス、プリプレグ及び金属張積層板 | |
| CN102850726A (zh) | 复合材料、用其制作的高频电路基板及其制作方法 | |
| TWI704185B (zh) | 樹脂組合物、印刷電路用預浸片及覆金屬層壓板 | |
| JP2014503029A (ja) | 電気積層板、高密度相互接続および相互接続基材応用に有用な高性能熱硬化性樹脂 | |
| WO2024135629A1 (ja) | 変性スチレン系エラストマー及び変性スチレン系エラストマーの製造方法 | |
| WO2024038845A1 (ja) | 樹脂組成物 | |
| TWI763402B (zh) | 一種熱固性樹脂組成物及其應用 | |
| JP2024059184A (ja) | 変性スチレン系エラストマーの製造方法 | |
| WO2024038847A1 (ja) | 変性スチレン系エラストマー | |
| WO2024038846A1 (ja) | 変性スチレン系エラストマー | |
| WO2024038848A1 (ja) | マレイミド変性スチレン系エラストマー及びマレイミド変性スチレン系エラストマーの製造方法 | |
| JP2004059703A (ja) | エポキシ樹脂組成物、プリプレグ及び積層板 | |
| TW202317678A (zh) | 預浸體、積層板、及印刷配線板 | |
| CN119751870A (zh) | 改性马来酰亚胺预聚物、树脂组合物、半固化片及其应用 | |
| WO2025074909A1 (ja) | 樹脂組成物、プリプレグ、積層板、プリント配線板及び半導体パッケージ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23906989 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024566054 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380086841.6 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1020257023117 Country of ref document: KR |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380086841.6 Country of ref document: CN |
|
| WWP | Wipo information: published in national office |
Ref document number: 1020257023117 Country of ref document: KR |