CN114671764A - Ester compound and use thereof - Google Patents

Abstract

The present invention provides an ester compound represented by the following general formula (1) and use thereof. A cured product of a curable composition using the ester compoundWhen exposed to moist heat, the dielectric loss tangent also increases little, and therefore, the resin composition can be used for prepregs, printed wiring boards, build-up films, semiconductor sealing materials, and semiconductor devices. Ar in the general formula (1)¹Each independently is an aryl group which may have a substituent. Ar (Ar)²Each independently is an arylene group which may have a substituent. R¹Is an aliphatic hydrocarbon group having 4 to 20 carbon atoms.

Description

Ester compounds and their applications

technical field

The present invention relates to an ester compound and its application, a polyester resin, a curable composition, a cured product, a prepreg, a printed wiring board, a build-up film, a semiconductor sealing material, and a semiconductor device.

Background technique

In recent years, the miniaturization and high performance of electronic devices have been advanced, and the required performance of various materials used has been increased along with this. For example, in semiconductor package substrates, the speed and frequency of signals are increasing, and a material with low power loss, that is, a material with low dielectric loss tangent, has been sought.

As a material of such a low dielectric loss tangent, the technique which uses an active ester compound as a hardening|curing agent of an epoxy resin, for example is known (refer patent document 1). The epoxy resin composition described in Patent Document 1 has a characteristic that the dielectric loss tangent in the cured product is low as compared with a general epoxy resin composition using a phenol resin as a curing agent. However, the resistance to moisture absorption was not sufficient, and the dielectric loss tangent increased significantly when exposed to moist heat conditions.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2004-155990

SUMMARY OF THE INVENTION

[Problems to be Solved by Invention]

Therefore, the subject to be solved by the present invention is to provide a resin material with a small increase in the dielectric loss tangent when the cured product is exposed to moist heat conditions.

[Technical means to solve the problem]

The inventors of the present invention have made diligent studies to solve the above-mentioned problems, and as a result, they have found that in an ester compound having a specific molecular structure and a polyester resin containing the ester compound, when the cured product of the polyester resin is exposed to moist heat conditions The rise of the dielectric loss tangent at the lower time is small, and the present invention has been completed.

That is, the present invention relates to an ester compound (A) represented by the following general formula (1).

[hua 1]

[Ar ¹ in the general formula (1) is each independently an aryl group which may have a substituent. Ar ² is each independently an arylene group which may have a substituent. R ¹ is an aliphatic hydrocarbon group having 4 to 20 carbon atoms. ]

The present invention further relates to a polyester resin containing the ester compound (A).

The present invention further relates to a curable composition containing the ester compound (A) or the polyester resin.

The present invention further relates to a cured product of the curable composition.

The present invention further relates to a prepreg using the curable composition.

The present invention further relates to a printed wiring board using the curable composition.

The present invention further relates to a build-up film using the curable composition.

The present invention further relates to a semiconductor sealing material using the curable composition.

The present invention further relates to a semiconductor device using the semiconductor sealing material using the curable composition.

[Effect of invention]

According to the present invention, there can be provided an ester compound, a polyester resin, a curable composition, a cured product, a prepreg, and a printed wiring having a small increase in the dielectric loss tangent when the cured product is exposed to moist heat conditions. Substrates, buildup films, semiconductor sealing materials, and semiconductor devices.

Description of drawings

1 is a graph of gel permeation chromatography (GPC) of the polyester resin (1) obtained in Example 1. FIG.

2 is a GPC chart of the polyester resin (2) obtained in Example 2. FIG.

3 is a GPC chart of the polyester resin (3) obtained in Example 3. FIG.

Detailed ways

Hereinafter, the form for implementing this invention is demonstrated in detail.

The ester compound (A) of the present invention is characterized by being represented by the following general formula (1).

[hua 2]

[Ar ¹ in the general formula (1) is an aryl group which may have a substituent. Ar ² is an arylene group which may have a substituent. R ¹ is an aliphatic hydrocarbon group having 4 to 20 carbon atoms. ]

Ar ¹ in the general formula (1) is an aryl group which may have a substituent. Specific examples thereof include, for example, a phenyl group, a naphthyl group, and a structure having one or more substituents such as halogen atoms, aliphatic hydrocarbon groups, alkoxy groups, alkenyloxy groups, and alkynyloxy groups on their aromatic rings. parts etc.

The halogen atom includes, for example, a fluorine atom, a chlorine atom, a bromine atom, and the like. The aliphatic hydrocarbon group may be either a straight-chain type or a branched type, and may have an unsaturated bond in the structure. Specifically, alkyl groups having 1 to 8 carbon atoms such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, and octyl, or vinyl, allyl, 1- -Alkenyl having 2 to 4 carbon atoms such as butenyl, 2-butenyl, and 3-butenyl, ethynyl, propargyl, 1-butynyl, 2-butynyl, Alkynyl having 2 to 4 carbon atoms such as 3-butynyl and the like. As said alkoxy group, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, etc. are mentioned, for example. Examples of the alkenyloxy group include vinyloxy, allyloxy, 1-butenyloxy, 2-butenyloxy, 3-butenyloxy, and the like having 2 to 4 carbon atoms. alkenyloxy, etc. Examples of the alkynyloxy group include ethynyloxy, propargyloxy, 1-butynyloxy, 2-butynyloxy, 3-butynyloxy, and the like having 2 to 4 carbon atoms. alkynyloxy, etc.

Among them, the ester compound (A) alone can undergo a curing reaction or the ester compound (A) can be formulated with other polymerizable unsaturated group-containing compounds such as a maleimide resin to undergo a curing reaction, The Ar ¹ preferably has at least one to three alkenyl groups having 2 to 4 carbon atoms, alkynyl groups having 2 to 4 carbon atoms, alkenyloxy groups having 2 to 4 carbon atoms, carbon atoms Any one or more of alkynyloxy groups having 2 to 4 atoms. In this case, the Ar ¹ may have a substituent other than these.

Ar ² in the general formula (1) is an arylene group which may have a substituent. Specific examples thereof include, for example, a phenylene group, a naphthylene group, and substituents such as one or more halogen atoms, aliphatic hydrocarbon groups, alkoxy groups, alkenyloxy groups, and alkynyloxy groups on their aromatic rings. structural parts, etc. Specific examples of the halogen atom, aliphatic hydrocarbon group, alkoxy group, alkenyloxy group, and alkynyloxy group include the same groups as those listed as examples of the substituent on Ar ¹ described above.

Among them, Ar ² is preferably a phenylene group, a naphthylene group, and any one or more structural moieties of halogen atoms, aliphatic hydrocarbon groups, and alkoxy groups having 1 to 3 atoms on their aromatic rings, and preferably an arylene group phenyl or naphthylene.

R ¹ in the general formula (1) is an aliphatic hydrocarbon group having 4 to 20 carbon atoms. The aliphatic hydrocarbon group may be either a straight-chain type or a branched type, and may have an unsaturated bond in the structure. Among them, R ¹ is preferably a straight-chain alkylene group, and the number of carbon atoms thereof is preferably in the range of 6 to 14, since the effect of excellent dielectric properties in the cured product is more remarkable.

The method for producing the ester compound (A) is not particularly limited, and examples thereof include a phenolic hydroxyl group-containing compound (a1) represented by the following structural formula (3) and a compound (a1) represented by the following general formula (4), for example. The method in which the aromatic dicarboxylic acid or its acid halide (a2), and the diol compound (a3) represented by the following structural formula (5) are used as reaction raw materials.

[hua 3]

Ar ¹ -OH (3)

HO-R ¹ -OH (5)

[Ar ¹ in the general formula (3) is an aryl group which may have a substituent. Ar ² in the general formula (4) is an arylene group which may have a substituent. In the general formula (5), R ¹ is an aliphatic hydrocarbon group having 4 to 20 carbon atoms. ]

Specific examples and preferred ones of Ar ¹ , Ar ² , and R ¹ in the general formulae (3) to (5) are the same as those in the general formula (1).

When producing the polyester compound (A) from the phenolic hydroxyl group-containing compound (a1), the aromatic dicarboxylic acid or its acid halide (a2), and the diol compound (a3), By-products other than the ester compound (A) may be generated in the reaction product. In the present invention, the ester compound (A) may be used after being separated and purified from the reaction product, or the reaction product may be used as the polyester resin of the present invention.

When the phenolic hydroxyl group-containing compound (a1), the aromatic dicarboxylic acid or its acid halide (a2), and the reaction product of the diol compound (a3) are used as they are as the polyester of the present invention In the case of resin, in addition to the above-mentioned phenolic hydroxyl group-containing compound (a1), the above-mentioned aromatic dicarboxylic acid or its acid halide (a2), and the above-mentioned diol compound (a3), reactions other than these may be used in combination raw material. In this case, the above-mentioned phenolic hydroxyl group-containing compound (a1), the above-mentioned aromatic dicarboxylic acid or its acid halide (a2) can be used as a polyester resin having more excellent dielectric properties in the cured product. The total mass of the diol compound (a3) in 100 parts by mass of the reaction raw materials of the polyester resin is preferably 80 parts by mass or more, more preferably 90 parts by mass or more, and particularly preferably 95 parts by mass or more.

The reaction method of the phenolic hydroxyl group-containing compound (a1), the aromatic dicarboxylic acid or its acid halide (a2), and the diol compound (a3) is not particularly limited. It can be produced by a unified reaction method or by a multi-stage reaction such as reacting a part of the reaction raw materials first and then reacting the remaining reaction raw materials, and in particular, the ester compound (A) can be produced more efficiently. , it is preferable to prepare an intermediate (M) which is an esterified product of the phenolic hydroxyl group-containing compound (a1) and the aromatic dicarboxylic acid or its acid halide (a2) in advance, and make it with the The diol compound (a3) is reacted.

The reaction between the phenolic hydroxyl group-containing compound (a1) and the aromatic dicarboxylic acid or its acid halide (a2) can be carried out by, for example, in the presence of a base catalyst at a temperature of about 20°C to 70°C It is carried out by the method of heating and stirring. The reaction can also be carried out in an organic solvent, if necessary. After completion of the reaction, if necessary, the reaction product may be purified by washing with water, reprecipitation, or the like.

Examples of the base catalyst include sodium hydroxide, potassium hydroxide, triethylamine, triphenylamine, pyridine, imidazole, diazabicycloundecene, diazabicyclononene, and the like. These may be used independently, respectively, and may use 2 or more types together. In addition, it can also be used as an aqueous solution of 3% by mass to 30% by mass. Among them, sodium hydroxide or potassium hydroxide with high catalytic ability is preferable. The addition amount of the base catalyst is preferably in the range of 0.1 mol to 3 mol with respect to 1 mol of the hydroxyl group in the reaction raw material. In addition, in order to improve the reaction efficiency, an interlayer transfer catalyst such as an alkylammonium salt or a crown ether can also be used. These may be used independently, respectively, and may use 2 or more types together. The addition amount of the interlayer migration catalyst is preferably in the range of 0.01 mass % to 1 mass % with respect to the total mass of the reaction raw materials.

Examples of the organic solvent include ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone, ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate, and carbitol acetic acid. Acetate solvents such as esters, cellosolves, carbitol solvents such as butyl carbitol, aromatic hydrocarbon solvents such as toluene and xylene, dimethylformamide, dimethylacetamide, N-methyl pyrrolidone, etc. These may be used independently, respectively, and may be used in the form of a mixed solvent of 2 or more types. It is preferable that the usage-amount of these organic solvents is the range of 20 mass % - 300 mass % with respect to the total mass of a reaction raw material.

Regarding the reaction ratio between the phenolic hydroxyl group-containing compound (a1) and the aromatic dicarboxylic acid or its acid halide (a2), the ester compound (A) can be obtained in a higher yield, The phenolic hydroxyl group-containing compound (a1) is preferably in the range of 0.8 mol to 3 mol, more preferably 1.5 mol to 2.2 mol, relative to 1 mol of the aromatic dicarboxylic acid or its acid halide (a2). mole range.

For example, the reaction between the intermediate (M) of the esterified product of the phenolic hydroxyl group-containing compound (a1) and the aromatic dicarboxylic acid or its acid halide (a2) and the diol compound (a3) can be carried out, for example. It is performed by a method of heating and stirring in the presence of an alkali catalyst at a temperature of about 50°C to 250°C. The reaction can also be carried out in an organic solvent as necessary. After completion of the reaction, it is preferable to distill off the phenolic hydroxyl group-containing compound (a1) generated as a result of the transesterification reaction. In addition, if necessary, the reaction product may be purified by washing with water, reprecipitation, or the like.

Examples of the base catalyst include sodium hydroxide, potassium hydroxide, triethylamine, triphenylamine, pyridine, imidazole, diazabicycloundecene, diazabicyclononene, and the like. These may be used independently, respectively, and may use 2 or more types together. Moreover, you may use it as an aqueous solution of about 3.0 mass % - 30 mass %. Among them, diazabicycloundecene and diazabicyclononene with high catalytic ability are preferable. The addition amount of the base catalyst is preferably in the range of 0.01 mass % to 10 mass % with respect to the total mass of the reaction raw materials. In addition, in order to improve the reaction efficiency, an interlayer transfer catalyst such as an alkylammonium salt or a crown ether can also be used.

Examples of the organic solvent include ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone, ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate, and carbitol acetic acid. Acetate solvents such as esters, cellosolves, carbitol solvents such as butyl carbitol, aromatic hydrocarbon solvents such as toluene and xylene, dimethylformamide, dimethylacetamide, N-methyl pyrrolidone, etc. These may be used independently, respectively, and may be used in the form of a mixed solvent of 2 or more types.

Regarding the reaction ratio of the intermediate (M) and the diol compound (a3), in terms of obtaining the ester compound (A) in a higher yield, it is preferable to be relative to the diol compound (a3). ) while using an excess of said intermediate (M). Specifically, it is preferable to use 1.1 mol to 5 mol of the intermediate (M) with respect to 1 mol of the diol compound (a3), more preferably 1.5 mol to 4 mol, and still more preferably 1.8 mol to 3 mol. .

The effect of excellent dielectric properties in the cured product is more remarkable, and the content of the ester compound (A) in the polyester resin of the present invention is a value calculated from the area ratio in the graph of gel permeation chromatography (GPC). In total, it is preferably 10% or more, and more preferably 15% or more. In addition, the upper limit is preferably 60% or less, and more preferably 45% or less. In addition, gel permeation chromatography (GPC) was measured under the measurement conditions described in an Example.

Furthermore, it is preferable that the polyester resin of this invention contains the ester compound (B) represented by following General formula (2), since the effect which is excellent in the dielectric property in hardened|cured material is more remarkable. The content of the ester compound (B) in the polyester resin is preferably 10% or more, and more preferably 15% or more, as a value calculated from an area ratio in a graph of gel permeation chromatography (GPC). In addition, the upper limit is preferably 50% or less, and more preferably 35% or less. In addition, gel permeation chromatography (GPC) was measured under the measurement conditions described in an Example.

[hua 4]

[Ar ¹ in the general formula (2) is each independently an aryl group which may have a substituent. Ar ² is an arylene group which may have a substituent. ]

Specific examples and preferred ones of Ar ¹ and Ar ² in the general formula (2) are the same as those in the general formula (1).

The polyester resin of the present invention may contain an ester compound (C) represented by the following general formula (6) in addition to the ester compound (A) and the ester compound (B).

[hua 5]

[Ar ¹ in the general formula (1) is each independently an aryl group which may have a substituent. Ar ² is each independently an arylene group which may have a substituent. R ¹ is an aliphatic hydrocarbon group having 4 to 20 carbon atoms. n is an integer of 2 or more. ]

Specific examples and preferred ones of Ar ¹ , Ar ² , and R ¹ in the general formula (6) are the same as those in the general formula (1). n in the general formula (6) is an integer of 2 or more, more preferably an integer of 2 to 10.

The number average molecular weight (Mn) of the polyester resin of the present invention is preferably in the range of 500 to 5,000, and more preferably in the range of 600 to 3,000. Moreover, the weight average molecular weight (Mw) becomes like this. Preferably it is the range of 700-7,000, More preferably, it is the range of 800-5,000. In this specification, the number average molecular weight (Mn) and the weight average molecular weight (Mw) of the polyester resin are measured under the measurement conditions described in Examples using gel permeation chromatography (GPC).

In the case of having a polymerizable unsaturated group such as an alkenyl group, an alkynyl group, an alkenyloxy group, and an alkynyloxy group as a substituent on Ar ¹ or Ar ² in the general formula (1), the ester of the present invention can be The compound (A) or the polyester resin containing it can be used alone as a curable composition, or the ester compound (A) of the present invention or the polyester resin containing it can be polymerized with other containing compounds such as maleimide compounds. A compound of a sexually unsaturated group is formulated and used as a curable composition. In this case, the hardening reaction is generally carried out by light irradiation or heating. Although the heating temperature and heating time at the time of heat hardening can be adjusted suitably according to the preparation component etc. in a curable composition, it is preferable to heat at 100 degreeC - 300 degreeC for about 1 hour - 24 hours.

As said maleimide compound, the compound etc. which are represented by any one of following General formula (6) - General formula (9) are mentioned, for example. Moreover, as an example of the commercial item of maleimide resin, "BMI-1000", "BMI-2000", "BMI-2300", "BMI-3000" by Yamato Chemical Industry Co., Ltd. , "BMI-4000", "BMI-6000", "BMI-7000", "BMI-8000", "BMI-TMH", etc.; "BMI", "BMI-70", "BMI-70" manufactured by KI Chemical Co., Ltd. BMI-80", etc.; "B1109", "N1971", "B4807", "P0778", "P0976", etc. manufactured by Tokyo Chemical Industry Co., Ltd. The maleimide compound may be used alone or in combination of two or more.

[hua 6]

[R ² in the general formula (6) is a divalent organic group. R ³ in the general formulas (7) to (9) is an alkyl group having 1 to 8 carbon atoms, a halogen atom, an alkoxy group having 1 to 4 carbon atoms, an aryl group, and an aralkyl group. In either case, n is an integer of 0-3. X in the general formula (7) is an alkylene group having 1 to 6 carbon atoms, a cycloalkylene group having 6 to 20 carbon atoms, an arylene group, an alkylene arylene alkylene group, an oxygen atom, In either a sulfur atom or a carbonyl group, m is an integer of 1 or more. In the general formula (8), R ⁴ is any one of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and an aryl group. In the general formula (9), l is an integer of 3 to 6. ]

Regarding R ² in the general formula (6), specific examples of the divalent organic group include, for example, an alkylene group having 1 to 6 carbon atoms, a cycloalkylene group having 6 to 20 carbon atoms, and an arylene group. A group, an oxygen atom, a sulfur atom, a carbonyl group, a structural site formed by linking two or more of these groups, and the like. Specific examples of the compound represented by the general formula (6) include N,N'-ethylenebismaleimide and N,N'-hexamethylenebismaleimide, for example. , N,N'-(1,3-phenylene)bismaleimide, N,N'-[1,3-(2-methylphenylene)]bismaleimide, N ,N'-[1,3-(4-methylphenylene)]bismaleimide, N,N'-(1,4-phenylene)bismaleimide, bis(4 -maleimidophenyl)methane, bis(3-methyl-4-maleimidophenyl)methane, 3,3-dimethyl-5,5-diethyl-4,4- Diphenylmethane bismaleimide, bis(4-maleimide phenyl) ether, bis(4-maleimide phenyl) sulfone, bis(4-maleimide phenyl) ) sulfide, bis(4-maleimidophenyl)ketone, bis(4-maleimidocyclohexyl)methane, 1,4-bis(4-maleimidophenyl)cyclohexyl Alkane, 1,4-bis(maleimidomethyl)cyclohexane, 1,4-bis(maleimidomethyl)benzene, 1,3-bis(4-maleimidobenzene) oxy)benzene, 1,3-bis(3-maleimidophenoxy)benzene, bis[4-(3-maleimidophenoxy)phenyl]methane, bis[4-( 4-Maleimidephenoxy)phenyl]methane, 1,1-bis[4-(3-maleimidephenoxy)phenyl]ethane, 1,1-bis[4- (4-Maleimidophenoxy)phenyl]ethane, 1,2-bis[4-(3-maleimidephenoxy)phenyl]ethane, 1,2-bis[ 4-(4-Maleimidephenoxy)phenyl]ethane, 2,2-bis[4-(3-maleimidephenoxy)phenyl]propane, 2,2-bis [4-(4-Maleimidephenoxy)phenyl]propane, 2,2-bis[4-(3-maleimidephenoxy)phenyl]butane, 2,2- Bis[4-(4-maleimidophenoxy)phenyl]butane, 2,2-bis[[4-(3-maleimidophenoxy)phenyl]-1,1 ,1,3,3,3-hexafluoropropane, 2,2-bis[4-(4-maleimidephenoxy)phenyl]-1,1,1,3,3,3-hexa Fluoropropane, 4,4-bis(3-maleimidophenoxy)biphenyl, 4,4-bis(4-maleimidophenoxy)biphenyl, bis[4-(3- Maleimidophenoxy)phenyl]ketone, bis[4-(4-maleimidophenoxy)phenyl]ketone, 2,2'-bis(4-maleimidobenzene) base) disulfide, bis(4-maleimidophenyl)disulfide, bis[4-(3-maleimidophenoxy)phenyl]disulfide, bis[4-( 4-Maleimidephenoxy)phenyl]sulfide, bis[4-(3-maleimidephenoxy)phenyl]sulfoxide, bis[4-(4-maleimide Aminephenoxy)phenyl]sulfoxide, bis[4-(3-maleimidephenoxy)phenyl]sulfone, bis[4-(4-maleimidephenoxy)phenyl ] sulfone, bis[4-(3-maleimidophenoxy)phenyl]ether, bis[4-(4-maleimide) Leimidephenoxy)phenyl] ether, 1,4-bis[4-(4-maleimidephenoxy)-α,α-dimethylbenzyl]benzene, 1,3- Bis[4-(4-maleimidephenoxy)-α,α-dimethylbenzyl]benzene, 1,4-bis[4-(3-maleimidephenoxy)- α,α-Dimethylbenzyl]benzene, 1,3-bis[4-(3-maleimidephenoxy)-α,α-dimethylbenzyl]benzene, 1,4-bis [4-(4-Maleimidephenoxy)-3,5-dimethyl-α,α-dimethylbenzyl]benzene, 1,3-bis[4-(4-maleyl] iminophenoxy)-3,5-dimethyl-α,α-dimethylbenzyl]benzene, 1,4-bis[4-(3-maleimidephenoxy)-3, 5-Dimethyl-α,α-dimethylbenzyl]benzene, 1,3-bis[4-(3-maleimidephenoxy)-3,5-dimethyl-α,α -Dimethylbenzyl]benzene, 4-methyl-1,3-phenylenebismaleimide, polyphenylmethanemaleimide, etc.

When the ester compound (A) of the present invention or the polyester resin containing the same has a polymerizable unsaturated group, the ester compound (A) or the polyester resin containing the same has polymerizable properties with respect to the curable composition The ratio of the total mass of the compound of the unsaturated group is not particularly limited, and can be appropriately adjusted according to desired resin properties, applications, and the like. Among them, the ratio of the ester compound (A) or the polyester resin containing it to 100 parts by mass of the total mass of the compound having a polymerizable unsaturated group in the curable composition is preferably 20% by mass or more, more preferably 25% by mass The range of mass % - 75 mass % is more preferably the range of 30 mass % - 60 mass %.

The ester compound (A) of the present invention and the polyester resin containing the same have ester bonds between aromatic rings in the structure, and thus function as a so-called active ester compound or resin, and can be used as a so-called active ester compound or resin by blending with an epoxy resin or the like. Hardening composition. In this case, the hardening reaction is generally carried out by heating. The heating temperature and the heating time can be appropriately adjusted according to the preparation components in the curable composition, etc., but it is preferably heated at 100° C. to 300° C. for about 1 hour to 24 hours. In addition, the curable composition of the present invention may contain both a polymerizable unsaturated group-containing compound such as the maleimide compound and an epoxy resin.

The epoxy resin is not particularly limited, and examples thereof include phenol novolak-type epoxy resins, cresol novolak-type epoxy resins, α-naphthol novolak-type epoxy resins, and β-naphthol novolak-type epoxy resins. Epoxy resin, bisphenol A novolak epoxy resin, biphenyl novolak epoxy resin and other novolak epoxy resin; phenol aralkyl epoxy resin, naphthol aralkyl epoxy resin, phenol Aralkyl type epoxy resin such as biphenyl aralkyl type epoxy resin; bisphenol A type epoxy resin, bisphenol AP type epoxy resin, bisphenol AF type epoxy resin, bisphenol B type epoxy resin, Bisphenol BP type epoxy resin, bisphenol C type epoxy resin, bisphenol E type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, tetrabromobisphenol A type epoxy resin, etc. Bisphenol type epoxy resin; biphenyl type epoxy resin, such as biphenyl type epoxy resin, tetramethyl biphenyl type epoxy resin, epoxy resin with biphenyl skeleton and diglycidyloxybenzene skeleton, etc.; naphthalene type epoxy resin; binaphthol type epoxy resin; binaphthyl type epoxy resin; dicyclopentadiene type epoxy resin such as dicyclopentadienol type epoxy resin; tetraglycidyl diaminodiphenyl Methane type epoxy resin, triglycidyl-p-aminophenol type epoxy resin, glycidylamine type epoxy resin of diaminodiphenyl sulfone and other glycidylamine type epoxy resin; 2,6-naphthalene dicarboxylic acid Diglycidyl ester type epoxy resins such as diglycidyl ester type epoxy resins and hexahydrophthalic anhydride glycidyl ester type epoxy resins; dibenzopyran, hexamethyldibenzopyran, 7 -Benzopyran-type epoxy resins such as phenylhexamethyldibenzopyran, etc. These may be used independently, respectively, and may use 2 or more types together.

When the curable composition of this invention contains the said epoxy resin, you may use together the hardening|curing agent for epoxy resins other than the ester compound (A) of this invention or a polyester resin. Examples of the curing agent for epoxy resins include the ester compound (A) of the present invention, or active ester resins other than polyester resins, or amine compounds, amide compounds, acid anhydrides, phenol resins, cyanate ester resins, and benzos. oxazine resin, etc.

When the curable composition of the present invention contains the epoxy resin, it is preferable that the blending ratio with the ester compound (A) or polyester resin of the present invention, or a curing agent for epoxy resins other than that is based on curing The total of 1 mol of epoxy groups in the sexual composition and the total of functional groups in the curing agent are in a ratio of 0.7 mol to 1.5 mol.

The curable composition of this invention may contain various additives, such as a hardening accelerator, a flame retardant, an inorganic filler, a silane coupling agent, a mold release agent, a pigment, and an emulsifier, as needed.

The curing accelerator is not particularly limited, and examples include phosphorus-based curing accelerators, amine-based curing accelerators, imidazole-based curing accelerators, guanidine-based curing accelerators, urea-based curing accelerators, peroxides, azo compounds, etc.

Examples of the phosphorus-based curing accelerator include organic phosphine compounds such as triphenylphosphine, tributylphosphine, tri-p-tolylphosphine, diphenylcyclohexylphosphine, and tricyclohexylphosphine; trimethylphosphite , triethyl phosphite and other organic phosphite compounds; ethyl triphenyl phosphonium bromide, benzyl triphenyl phosphonium chloride, butyl phosphonium tetraphenyl borate, tetraphenyl phosphonium tetraphenyl boron acid salt, tetraphenylphosphonium tetra-p-tolyl borate, triphenylphosphine triphenylborane, tetraphenylphosphonium thiocyanate, tetraphenylphosphonium dicyanamide, butylphenylphosphonium dicyanate Phosphonium salts such as cyanamide salt, tetrabutylphosphonium decanoate, etc.

Examples of the amine-based curing accelerator include triethylamine, tributylamine, N,N-dimethylaminopyridine (4-dimethylaminopyridine, DMAP), 2,4,6-tris(dimethylaminomethyl) base) phenol, 1,8-diazabicyclo[5.4.0]-undecene-7(1,8-diazabicyclo[5.4.0]-undecene-7, DBU), 1,5-diazabicyclo [4.3.0]-nonene-5 (1,5-diazabicyclo[4.3.0]nonene-5, DBN) and the like.

Examples of imidazole-based curing accelerators include 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 1,2-dimethylimidazole, and 2-ethyl-4-methyl Imidazole, 2-phenylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenylimidazole, 1-cyanoethyl-2- Methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazolium trimellitate, 1-cyanoethyl-2-phenylimidazolium trimellitate, 2-phenylimidazolium isocyanurate plus Product, 2-phenyl-4,5-dihydroxymethylimidazole, 2-phenyl-4-methyl-5-hydroxymethylimidazole, 2,3-dihydro-1H-pyrrolo[1,2 -a] Benzimidazole, 1-dodecyl-2-methyl-3-benzylimidazolium chloride, 2-methylimidazoline and the like.

Examples of guanidine-based curing accelerators include dicyandiamide, 1-methylguanidine, 1-ethylguanidine, 1-cyclohexylguanidine, 1-phenylguanidine, dimethylguanidine, diphenylguanidine, and trimethylguanidine. guanidine, tetramethylguanidine, pentamethylguanidine, 1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-methyl-1,5,7-triazabicyclo[ 4.4.0] Dec-5-ene, 1-methyl biguanide, 1-ethyl biguanide, 1-butyl biguanide, 1-cyclohexyl biguanide, 1-allyl biguanide, 1-phenyl biguanide and the like.

Examples of the urea-based curing accelerator include 3-phenyl-1,1-dimethylurea, 3-(4-methylphenyl)-1,1-dimethylurea, and chlorophenylurea , 3-(4-chlorophenyl)-1,1-dimethylurea, 3-(3,4-dichlorophenyl)-1,1-dimethylurea, etc.

Examples of the peroxide include dicumyl peroxide, benzoyl peroxide, p-chlorobenzoyl peroxide, di-tert-butyl peroxide, diisopropyl peroxycarbonate, peroxycarbonic acid Di-2-ethylhexyl ester, azobisisobutyronitrile, etc.

Among the hardening accelerators, dicumyl peroxide, 2-ethyl-4-methylimidazole, and dimethylaminopyridine are preferably used.

In addition, these hardening accelerators may be used alone or in combination of two or more.

The usage-amount of a hardening accelerator is preferably 0.01 to 5 parts by mass, more preferably 0.1 to 3 parts by mass, with respect to 100 parts by mass of the resin solid content of the curable composition. When the usage-amount of a hardening accelerator is 0.01 mass part or more, since hardenability is excellent, it is preferable. On the other hand, when the usage-amount of a hardening accelerator is 5 mass parts or less, since formability is excellent, it is preferable.

Examples of the flame retardant include inorganic phosphorus compounds such as red phosphorus, ammonium phosphates such as monoammonium phosphate, diammonium phosphate, triammonium phosphate, and ammonium polyphosphate, and phosphoric acid amides; phosphate ester compounds, phosphonic acid compounds, and phosphinic acid compounds. , phosphine oxide compounds, phosphorane compounds, organic nitrogen-containing phosphorus compounds, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 10-(2,5-dihydro- Hydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide, 10-(2,7-dihydroxynaphthyl)-10H-9-oxa-10-phosphaphenanthrene-10 - Cyclic organophosphorus compounds such as oxides and organophosphorus compounds such as derivatives obtained by reacting these organophosphorus compounds with compounds such as epoxy resins or phenol resins; triazine compounds, cyanuric acid compounds, isocyanuric acid compounds , phenothiazine and other nitrogen flame retardants; silicone oil, silicone rubber, silicone resin and other silicone flame retardants; metal hydroxides, metal oxides, metal carbonate compounds, metal powders, boron compounds , Inorganic flame retardants such as low melting point glass, etc. When using these flame retardants, it is preferable that it is the range of 0.1 mass % - 20 mass % in a curable resin composition.

The inorganic filler is prepared, for example, when the curable resin composition of the present invention is used for a semiconductor sealing material. Examples of the inorganic filler include fused silica, crystalline silica, alumina, silicon nitride, aluminum hydroxide, and the like. Among them, the above-mentioned fused silica is preferable because more inorganic fillers can be blended. The fused silica may be either crushed or spherical, but it is preferable to mainly use spherical silica in order to increase the blending amount of fused silica and suppress an increase in the melt viscosity of the curable composition. . Furthermore, in order to increase the compounding amount of spherical silica, it is preferable to appropriately adjust the particle size distribution of spherical silica. About the filling rate, it is preferable to mix|blend in the range of 0.5 mass part - 95 mass parts in 100 mass parts of curable resin compositions.

Furthermore, when the curable composition of the present invention is used for an application such as a conductive paste, a conductive filler such as silver powder or copper powder can be used.

When the curable composition of the present invention is used for a printed wiring board application or a build-up adhesive film application, it is generally preferable to prepare and dilute an organic solvent before use. Examples of the organic solvent include methyl ethyl ketone, acetone, dimethylformamide, methyl isobutyl ketone, methoxypropanol, cyclohexanone, methyl cellosolve, and ethyl diethylene glycol. Acetate, propylene glycol monomethyl ether acetate, etc. The type and compounding amount of the organic solvent can be appropriately adjusted according to the use environment of the curable composition. For example, in the use of printed wiring boards, methyl ethyl ketone, acetone, dimethylformamide, cyclohexanone, etc. are preferable. The polar solvent having a boiling point of 160° C. or lower is preferably used in a proportion of 25% by mass to 80% by mass of the nonvolatile content. For use as a build-up adhesive film, ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone, ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate, carbitol are preferably used Acetate solvents such as alcohol acetates, cellosolves, carbitol solvents such as butyl carbitol, aromatic hydrocarbon solvents such as toluene and xylene, dimethylformamide, dimethylacetamide, N-methyl It is preferable to use pyrrolidone etc. in the ratio of 25 mass % - 60 mass % of nonvolatile content.

Moreover, the method for producing a printed wiring board using the curable composition of the present invention includes, for example, a method of impregnating a reinforcing base material with the curable composition and curing it to obtain a prepreg, and mixing this with a copper foil Overlap and heat crimp. Examples of the reinforcing substrate include paper, glass cloth, glass nonwoven fabric, aromatic polyamide paper, aromatic polyamide cloth, glass mat, glass roving, and the like. The impregnation amount of the curable composition is not particularly limited, but it is usually preferable to prepare it so that the resin component in the prepreg becomes 20% by mass to 60% by mass.

When using the curable composition of this invention for a semiconductor sealing material application, it is generally preferable to mix|blend an inorganic filler. The semiconductor sealing material can be prepared by mixing the formulation using, for example, an extruder, a kneader, a roll, or the like. A method of molding a semiconductor package using the obtained semiconductor sealing material includes, for example, a method in which the semiconductor sealing material is molded using a casting or transfer molding machine, an injection molding machine, or the like, and further heated at a temperature of 50° C. to 200° C. for 2 hours. In ~10 hours, by this method, a semiconductor device as a molded product can be obtained.

[Example]

Next, although an Example and a comparative example are used and this invention is demonstrated more concretely, this invention is not limited to these.

<Measurement conditions for gel permeation chromatography (GPC)>

Measuring device: "HLC-8320GPC" manufactured by Tosoh Corporation,

String: Guard string "HXL-L" manufactured by Tosoh Corporation

+ "TSK-GEL G4000HXL" manufactured by Tosoh Corporation

+ "TSK-GEL G3000HXL" manufactured by Tosoh Corporation

+ "TSK-GEL G2000HXL" manufactured by Tosoh Corporation

+ "TSK-GEL G2000HXL" manufactured by Tosoh Corporation

Detector: RI (differential refractometer)

Data processing: "GPC workstation EcoSEC-Work Station" manufactured by Tosoh Corporation

Measurement conditions: column temperature 40°C

Developing solvent Tetrahydrofuran

Flow rate 1.0ml/min

Standard: According to the measurement manual of "GPC-8320", the following monodisperse polystyrene whose molecular weight is known is used.

(using polystyrene)

"A-500" manufactured by Tosoh Corporation

"A-1000" manufactured by Tosoh Corporation

"A-2500" manufactured by Tosoh Corporation

"A-5000" manufactured by Tosoh Corporation

"F-1" manufactured by Tosoh Corporation

"F-2" manufactured by Tosoh Corporation

"F-4" manufactured by Tosoh Corporation

"F-10" manufactured by Tosoh Corporation

"F-20" manufactured by Tosoh Corporation

"F-40" manufactured by Tosoh Corporation

"F-80" manufactured by Tosoh Corporation

"F-128" manufactured by Tosoh Corporation

Sample: A sample (50 μl) obtained by filtering a tetrahydrofuran solution of 1.0 mass % in terms of resin solid content using a microfilter.

< ^13C -NMR measurement conditions>

Device: "JNM-ECA500" manufactured by Nippon Electronics Co., Ltd.

Assay mode: inverse gated decoupling

Solvent: deuterated dimethyl sulfoxide

Pulse angle: 30° pulse

Sample concentration: 30% by mass

Accumulated times: 4,000 times

Benchmark of chemical shift: Peak of dimethyl sulfoxide: 39.5ppm

<Measurement by FD-MS>

FD-MS was measured using the double focusing (double focussing) mass spectrometer "AX505H (FD505H)" manufactured by JEOL Ltd.

(Example 1: Production of polyester resin (1))

101.0 g of isophthalic acid chlorides and 397.0 g of toluene were put into a flask equipped with a thermometer, dropping funnel, cooling tube, fractionation tube, and stirrer, and the inside of the system was replaced with nitrogen under reduced pressure for dissolution. Next, 134.0 g of 2-allylphenol was charged, and the inside of the system was replaced with nitrogen under reduced pressure to dissolve. Furthermore, 0.30 g of tetrabutylammonium bromide was added and dissolved. The inside of the system was controlled to be 60° C. or lower while nitrogen purging was performed, and then 206.0 g of a 20% aqueous sodium hydroxide solution was added dropwise over 3 hours. Stirring was continued for 1.0 hour under the same temperature condition. After the reaction was completed, it was left to stand for liquid separation, and the aqueous layer was removed. Water was put into the toluene layer in which the reactant was dissolved, and the mixture was stirred and mixed for about 15 minutes, and the solution was allowed to stand for liquid separation to remove the water layer. This operation was repeated until the pH of the aqueous layer became 7. Then, water and toluene were removed by decantation dehydration to obtain a liquid intermediate (1). The carbon spectrum nuclear magnetic resonance ( ¹³ C-nuclear magnetic resonance, ¹³ C-NMR) chart of the intermediate (1) is shown in FIG. 1 , the FD-MS chart is shown in FIG. 2 , and the GPC chart is shown in FIG. 3 .

60.0 g of 1,9-nonanediol, 298.4 g of the intermediate (1), diazabicycloundecene ( DBU) 1.79g. After the inside of the system was replaced with nitrogen under reduced pressure, the temperature was raised to 190° C., and the mixture was stirred at the same temperature for 3 hours. Then, 2-allylphenol was distilled off under reduced pressure, and polyester resin (1) was obtained. The weight average molecular weight (Mw) of the polyester resin (1) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 1,848. In addition, the content of the ester compound (A) in the polyester resin (1) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 29%, and the content of the ester compound (B) was 21%. The GPC chart of the polyester resin (1) is shown in FIG. 1 .

(Example 2: Production of polyester resin (2))

40.0 g of 1,6-hexanediol, 249.5 g of the intermediate (1), diazabicycloundecene ( DBU) 1.45g. After the inside of the system was replaced with nitrogen under reduced pressure, the temperature was raised to 190° C., and the mixture was stirred at the same temperature for 3.5 hours. Then, 2-allylphenol was distilled off under reduced pressure, and polyester resin (2) was obtained. The weight average molecular weight (Mw) of the polyester resin (2) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 1,489. In addition, the content of the ester compound (A) in the polyester resin (2) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 28%, and the content of the ester compound (B) was 21%. The GPC chart of the polyester resin (2) is shown in FIG. 2 .

(Example 3: Production of polyester resin (3))

50.0 g of 1,12-dodecanediol, 208.74 g of the intermediate (1), and diazabicycloundec were charged into a flask equipped with a thermometer, dropping funnel, cooling tube, fractionating tube, and stirrer. Diene (DBU) 1.29g. After the inside of the system was replaced with nitrogen under reduced pressure, the temperature was raised to 190°C, and the mixture was stirred at the same temperature for 7 hours. Then, 2-allylphenol was distilled off under reduced pressure, and polyester resin (3) was obtained. The weight average molecular weight (Mw) of the polyester resin (3) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 1,647. In addition, the content of the ester compound (A) in the polyester resin (3) calculated from the area ratio in the graph of gel permeation chromatography (GPC) was 32%, and the content of the ester compound (B) was 26%. The GPC chart of the polyester resin (3) is shown in FIG. 3 .

(Examples 4 to 6 and Comparative Example 1)

<Preparation of curable composition>

The polyester resin, the maleimide resin, and the catalyst were prepared in the ratios shown in Table 1, and heated and mixed to obtain a curable composition.

Maleimide resin: "BMI-5100" manufactured by Daiwa Chemical Industry Co., Ltd.

Catalyst: Dicumyl Peroxide

<Preparation of test pieces>

The curable composition obtained above was poured into a mold frame having a thickness of 2 mm, and was heated at 200° C. for 3 hours to be hardened. Then, it heated and vacuum-dried, and it preserve|saved for 24 hours in the room|chamber interior of 23 degreeC and 50% of humidity, and obtained the test piece.

<Measurement of dielectric loss tangent>

According to Japanese Industrial Standards (JIS)-C-6481, the impedance material analyzer "HP4291B" manufactured by Agilent Technologies Co., Ltd. was used to measure the dielectric properties of the test pieces at 1GHz and 10GHz. Electrical loss tangent. In addition, the dielectric loss tangents at 1 GHz and 10 GHz were measured after the test piece was left to stand under damp heat conditions (121° C., 100% humidity) for 6 hours. In addition, its rate of change is calculated. The results are shown in Table 1.

[Table 1]

Claims (14)

1. An ester compound (A) represented by the following general formula (1),

ar in the general formula (1)¹Each independently an aryl group which may have a substituent; ar (Ar)²Each independently is an arylene group which may have a substituent; r¹Is an aliphatic hydrocarbon group having 4 to 20 carbon atoms.

2. The ester compound (A) according to claim 1, wherein Ar in the general formula (1) ¹Has 1-3 alkenyl groups having 2-4 carbon atoms, alkynyl groups having 2-4 carbon atoms, alkenyloxy groups having 2-4 carbon atoms, and alkynyloxy groups having 2-4 carbon atoms.

3. A polyester resin comprising the ester compound (a) according to claim 1 or 2.

4. The polyester resin according to claim 3, wherein the content of the ester compound (A) is in the range of 10% to 60% as a value calculated from an area ratio in a graph of Gel Permeation Chromatography (GPC).

5. The polyester resin according to claim 3 or 4, comprising the ester compound (A) and an ester compound (B) represented by the following general formula (2),

ar in the general formula (2)¹Each independently an aryl group which may have a substituent; ar (Ar)²Is an arylene group which may have a substituent.

6. The polyester resin according to claim 5, wherein the content of the ester compound (B) is in the range of 10% to 50% as a value calculated from an area ratio of Gel Permeation Chromatography (GPC).

7. A curable composition comprising the ester compound (A) according to claim 1 or 2 or the polyester resin according to any one of claims 3 to 6.

8. The curable composition according to claim 7, further comprising a maleimide compound.

9. A cured product of the curable composition according to claim 7.

10. A prepreg using the curable composition according to claim 7 or 8.

11. A printed wiring board using the curable composition according to claim 7 or 8.

12. A build-up film using the curable composition according to claim 7 or 8.

13. A semiconductor sealing material using the curable composition according to claim 7 or 8.

14. A semiconductor device using the semiconductor sealing material according to claim 13.

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