Resin composition, pellet, and molded article

Abstract

The present invention provides a resin composition capable of forming a molded product with less wrinkles. A resin composition comprising a liquid crystalline polyester and an amorphous polyarylate, the liquid crystalline polyester comprising a first monomer unit having a condensed aromatic ring, the content of the first monomer unit being 20 mol% or more relative to the total of all monomer units constituting the liquid crystalline polyester, the glass transition temperature (Tg) of the amorphous polyarylate being 200°C or more.

Description

Technical Field

[0001] This disclosure relates to resin compositions, granules, and molded articles. Background Technology

[0002] Liquid crystal polyester is used in a variety of applications because of its high fluidity and heat resistance, which also results in high dimensional accuracy of the molded articles.

[0003] For example, in Patent Document 1, an aromatic liquid crystal polyester film for capacitors with excellent heat resistance, dielectric constant, and low dielectric loss was proposed, which uses an aromatic polyester with repeating structural units derived from p-hydroxybenzoic acid as the main component.

[0004] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2002-359145 Summary of the Invention

[0005] The problem that the invention aims to solve In recent years, from the perspective of expanding into more diverse applications and using it in more refined parts, there has been a demand for improved molding precision in resin molded products.

[0006] Conventional liquid crystal polyester compositions tend to have a tendency to develop wrinkles on the surface in their molded products (especially films).

[0007] The purpose of this disclosure is to provide a resin composition capable of forming molded articles with few wrinkles. Furthermore, the purpose of this disclosure is to provide granules and molded articles comprising the resin composition.

[0008] Methods for solving problems This disclosure provides, for example, the following.

[0009] [1] A resin composition, wherein, Includes liquid crystal polyester and amorphous polyarylate. The aforementioned liquid crystal polyester comprises a first monomer unit having a condensed aromatic ring. The content of the first monomer unit mentioned above is 20 mol% or more relative to the total number of monomer units constituting the liquid crystal polyester. The glass transition temperature (Tg) of the above-mentioned amorphous polyarylate is above 200℃.

[0010] [2] The resin composition according to [1], wherein, The content of the aforementioned liquid crystal polyester is 80% by mass or more.

[0011] [3] The resin composition according to [1] or [2], wherein, The content of the aforementioned amorphous polyarylate is 0.1 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the aforementioned liquid crystal polyester.

[0012] [4] The resin composition according to any one of [1] to [3], wherein, It further includes carbodiimide compounds having a carbodiimide group.

[0013] [5] A resin composition, It is a melt blend containing raw material components of liquid crystal polyester and amorphous polyarylate. The aforementioned liquid crystal polyester comprises a first monomer unit having a condensed aromatic ring. The content of the first monomer unit mentioned above is 20 mol% or more relative to the total number of monomer units constituting the liquid crystal polyester. The glass transition temperature (Tg) of the above-mentioned amorphous polyarylate is above 200℃.

[0014] [6] The resin composition according to [5], wherein, The content of the liquid crystal polyester in the above raw material components is 80% by mass or more.

[0015] [7] The resin composition according to [5] or [6], wherein, The content of the amorphous polyarylate in the above raw material components is 0.1 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the liquid crystal polyester.

[0016] [8] The resin composition according to any one of [5] to [7], wherein, The above-mentioned raw material components further contain carbodiimide compounds having carbodiimide groups.

[0017] [9] The resin composition according to any one of [1] to [8], wherein, The difference (Tm-Tg) between the melting point (Tm) of the liquid crystal polyester and the glass transition temperature (Tg) of the amorphous polyarylate is less than 100°C.

[0018]

[10] The resin composition according to any one of [1] to [9], wherein, The aforementioned condensed aromatic ring is a naphthalene ring.

[0019]

[11] The resin composition according to any one of [1] to

[10] , It has a melting point of over 300℃.

[0020]

[12] A granular material, It comprises any one of the resin compositions described in [1] to

[11] .

[0021]

[13] A molded article, It comprises any one of the resin compositions described in [1] to

[11] .

[0022]

[14] The molded article according to

[13] , It is a membrane.

[0023] Invention Effects According to this disclosure, a resin composition capable of forming molded articles with few wrinkles can be provided. Furthermore, according to this disclosure, granules and molded articles comprising the resin composition can be provided. Detailed Implementation

[0024] The preferred embodiments of this disclosure will now be described in detail.

[0025] The resin composition of this embodiment comprises a liquid crystal polyester and an amorphous polyarylate. The liquid crystal polyester comprises a first monomer unit having a condensed aromatic ring, and the content of the first monomer unit is 20 mol% or more relative to the total number of monomer units constituting the liquid crystal polyester. The glass transition temperature (Tg) of the amorphous polyarylate is 200°C or more.

[0026] If the resin composition of this embodiment is used, the formation of wrinkles during the molding of molded articles (e.g., films) can be suppressed, and molded articles (e.g., films) with fewer wrinkles can be obtained.

[0027] The reasons for the aforementioned effects may not be clear, but they are considered to be as follows: Liquid crystal polyesters with condensed aromatic rings are prone to orientation through the interaction of these condensed aromatic rings, which easily leads to anisotropy and wrinkles during molding. It is believed that the resin composition of this embodiment, since it contains amorphous polyarylate, can suppress the orientation of the liquid crystal polyester, mitigate anisotropy during molding, and suppress wrinkle formation. Furthermore, it is believed that since the glass transition temperature (Tg) of amorphous polyarylate is 200°C or higher, curing during molding becomes more uniform, thus suppressing wrinkle formation.

[0028] In the resin composition of this embodiment, liquid crystal polyester and amorphous polyarylate may also react with other components (such as the carbodiimide compounds described later) in part or all of their respective forms to form reactants.

[0029] It should be noted that in this specification, "the resin composition comprises liquid crystal polyester and amorphous polyarylate" also includes cases where the resin composition comprises reactants of liquid crystal polyester and other components, and / or reactants of amorphous polyarylate and other components. In this case, "content of liquid crystal polyester" represents the total amount of unreacted liquid crystal polyester and the portion derived from the liquid crystal polyester in the reactants. Furthermore, "content of amorphous polyarylate" represents the total amount of unreacted amorphous polyarylate and the portion derived from the amorphous polyarylate in the reactants.

[0030] The resin composition of this embodiment may also be referred to as a mixture of raw material components containing liquid crystal polyester and amorphous polyarylate. The resin composition of this embodiment may also be a melt blend of these raw material components.

[0031] Liquid crystal polyesters are any polyesters that exhibit liquid crystal properties in the molten state. A liquid crystal polyester can be a single polymer or a mixture of two or more polymers. When the liquid crystal polyester is a mixture of two or more polymers, the content of each monomer unit described later indicates the total amount of each monomer unit in the mixture. Furthermore, when the liquid crystal polyester is a mixture of two or more polymers, the parameters of the liquid crystal polyester described later indicate the parameters of the mixture (parameters measured using the mixture). It should be noted that the mixture used for measurement can, for example, be a mixture obtained by mixing powders of two or more polymers and then granulating them. Furthermore, the total of all monomer units indicates the total number of monomer units constituting each polymer.

[0032] Liquid crystal polyesters have constituent units (monomer units) derived from raw material monomers. Liquid crystal polyesters may also have monomer units whose main monomer units (e.g., monomer units comprising 90 mol% or more, 95 mol% or more, or 99 mol% or more of all monomer units, preferably all monomer units) are monomer units with aromatic rings, i.e., monomer units derived from aromatic compounds. Liquid crystal polyesters in which all monomer units are derived from aromatic compounds are also called fully aromatic liquid crystal polyesters.

[0033] It should be noted that, in this specification, "source" refers to a change in the chemical structure of the functional groups that facilitate polymerization in the monomer units of the liquid crystal polyester formed by the polymerization of the raw material monomers, without any other structural changes. The term "source" here also includes cases where the source is a polymerizable derivative of the raw material monomer (e.g., a compound formed by converting the polymerizable functional groups of the raw material monomer into other polymerizable groups).

[0034] Aromatic compounds are compounds having an aromatic ring. Preferred aromatic compounds as raw material monomers may have an aromatic ring and two or more polymerizable groups (e.g., hydroxyl, amino, or carboxyl groups, preferably hydroxyl or carboxyl groups) bonded to the aromatic ring.

[0035] Aromatic compounds may be, for example, compounds represented by the following formula (1-1) (hereinafter also referred to as monomer (1-1)), compounds represented by the following formula (1-2) (hereinafter also referred to as monomer (1-2)), or compounds represented by the following formula (1-3) (hereinafter also referred to as monomer (1-3)).

[0036] X1 -Ar 1 -Y 1 (1-1) X 2 -Ar 2 -X 3 (1-2) Y 2 -Ar 3 -Y 3 (1-3) [In the formula, Ar] 1 Ar 2 and Ar 3 Each of these groups independently represents a phenylene group, a biphenylene group, a condensed polycyclic aromatic hydrocarbon group, or a group represented by formula (Z-1). Ar 3 This indicates a phenylene group, a biphenylene group, a condensed polycyclic aromatic hydrocarbon group, or a group represented by formula (Z-1). Ar 1 Ar 2 and Ar 3 Some or all of the hydrogen atoms may be replaced by halogen atoms, alkyl groups, or aryl groups. X 1 X 2 and X 3 Each can be represented independently as either hydroxyl or amino. Y 1 Y 2 and Y 3 This indicates a carboxyl group. -Ar 4 -Z 1 -Ar 5 - (Z-1) [In the formula, Ar] 4 and Ar 5 Each can be used independently to represent either a phenylene group or a condensed polycyclic aromatic hydrocarbon group. Z 1 This represents an oxygen atom (-O-), a sulfur atom (-S-), a carbonyl group (-CO-), a sulfonyl group (-SO2-), or an alkane dimethyl group. The monomeric unit derived from the aromatic compound can be, for example, the monomeric unit represented by the following formula (2-1) (hereinafter also referred to as monomeric unit (2-1))., the constituent unit represented by the following formula (2-2) (hereinafter also referred to as monomeric unit (2-2))., or the constituent unit represented by the following formula (2-3) (hereinafter also referred to as monomeric unit (2-3)). It should be noted that monomeric unit (2-1) can be said to be a monomeric unit derived from monomer (1-1), monomeric unit (2-2) is a monomeric unit derived from monomer (1-2), and monomeric unit (2-3) is a monomeric unit derived from monomer (1-3).

[0037] -X 11 -Ar 1 -Y11 - (2-1) -X 12 -Ar 2 -X 13 - (2-2) -Y 12 -Ar 3 -Y 13 - (2-3) [In the formula, Ar] 1 Ar 2 and Ar 3 Same meaning as above. X 11 X 12 and X 13 Each can be represented independently as either an oxygen atom (-O-) or an imino atom (-NH-). Y 11 Y 12 and Y 13 This represents a carbonyl group (-CO-). The phenylene oxide can be, for example, 1,4-phenylene oxide or 1,3-phenylene oxide, preferably 1,4-phenylene oxide.

[0038] For example, a 4,4'-biphenylene oxide can be used.

[0039] A condensed polycyclic aromatic hydrocarbon group is a group obtained by removing two hydrogen atoms from a condensed polycyclic aromatic hydrocarbon. Examples of condensed polycyclic aromatic hydrocarbons include naphthalene, anthracene, phenanthrene, butane, pyrene, tribenzobenzene, perylene, and fluorene. Among these, naphthalene is preferred from the viewpoint of availability and price.

[0040] The condensed polycyclic aromatic hydrocarbon group can be naphthylene. For example, the naphthylene can be 2,6-naphthylene, 2,7-naphthylene, or 1,5-naphthylene, preferably 2,6-naphthylene.

[0041] Halogen atoms that can be used as substituents include fluorine, chlorine, bromine, and iodine. Halogen atoms that can be used as substituents can also be fluorine, chlorine, or bromine atoms, or they can be either fluorine or chlorine atoms, or they can be fluorine atoms.

[0042] The alkyl group used as a substituent can be straight-chain, branched, or cyclic. For example, the alkyl group can be an alkyl group having 1 to 10 carbon atoms. Examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-hexyl, 2-ethylhexyl, n-octyl, and n-decyl.

[0043] The aryl group used as a substituent can be either monocyclic or condensed. For example, aryl groups can have 6 to 20 carbon atoms. Examples of aryl groups include phenyl, o-tolyl, m-tolyl, p-tolyl, 1-naphthyl, and 2-naphthyl. Aryl groups can also be groups obtained by substituting the hydrogen atoms of the aromatic ring with alkyl groups, such as tolyl.

[0044] Ar 1 Ar 2 and Ar 3 The number of substituents can be, for example, 0 to 2, 0 or 1, or 0.

[0045] Z 1 The alkane dimethyl group can be straight-chain or branched. The alkane dimethyl group can be an alkane dimethyl group with 1 to 10 carbon atoms. Examples of alkane dimethyl groups include methylene, ethane dimethyl, propane dimethyl (e.g., propane-2,2-dimethyl), butane dimethyl, octane dimethyl (e.g., octane-3,3-dimethyl), etc.

[0046] Z 1 Preferably, it is an oxygen atom, a sulfur atom, a methylene group, an ethanediyl group, or a propanediyl group, and more preferably an oxygen atom.

[0047] X 1 X 2 and X 3 Preferably, hydroxyl group, X 11 X 12 and X 13 Preferably, the monomer (1-1) is an oxygen atom (-O-). That is, monomer (1-1) can be an aromatic hydroxycarboxylic acid, and monomer (1-2) can be an aromatic diol. It should be noted that monomer (1-3) can be an aromatic dicarboxylic acid.

[0048] The liquid crystal polyester contains a first monomer unit having a condensed aromatic ring.

[0049] The condensed aromatic rings possessed by the first monomer unit can be categorized as naphthalene rings, anthracene rings, phenanthrene rings, butane rings, pyrene rings, tribenzobenzene rings, perylene rings, fluorene rings, etc. Among these, naphthalene rings are preferred from the viewpoint of availability and price.

[0050] The first single-unit may be a single-unit conforming to single-unit (2-1), a single-unit conforming to single-unit (2-2), or a single-unit conforming to single-unit (2-3). For example, the first single-unit may also be a single-unit conforming to single-unit (2-1) or single-unit (2-3).

[0051] The first monomer unit could also be, for example, Ar. 1The monomeric unit (2-1) (hereinafter also referred to as monomeric unit (2-1-1)) is a condensed polycyclic aromatic hydrocarbon group, and can also be Ar. 2 The monomeric unit (2-2) (hereinafter also referred to as monomeric unit (2-2-1) is a condensed polycyclic aromatic hydrocarbon group, and can also be Ar. 3 The monomer unit (2-3) is a condensed polycyclic aromatic hydrocarbon group (hereinafter also referred to as monomer unit (2-3-1)). In the first monomer unit, the condensed polycyclic aromatic hydrocarbon group is preferably naphthylene, more preferably 2,6-naphthylene.

[0052] The first monomer unit can also be referred to as a monomer unit derived from a first monomer having a condensed aromatic ring.

[0053] The first monomer can be a monomer that conforms to monomer (1-1), a monomer that conforms to monomer (1-2), or a monomer that conforms to monomer (1-3). For example, the first monomer can also be a monomer that conforms to monomer (1-1) or monomer (1-3).

[0054] The first monomer could also be, for example, Ar. 1 The monomer (1-1) is a condensed polycyclic aromatic hydrocarbon group (hereinafter also referred to as monomer (1-1-1)). It can also be Ar. 2 The monomer (1-2) is a condensed polycyclic aromatic hydrocarbon group (hereinafter also referred to as monomer (1-2-1)). It can also be Ar. 3 The monomer (1-3) is a condensed polycyclic aromatic hydrocarbon group (hereinafter also referred to as monomer (1-3-1)). In the first monomer, the condensed polycyclic aromatic hydrocarbon group is preferably naphthylene, more preferably 2,6-naphthylene.

[0055] Examples of first monomers include 2-hydroxy-6-naphthoic acid, 2,6-naphthoic dicarboxylic acid, 2,6-dihydroxynaphthoic acid, 1,5-dihydroxynaphthoic acid, 2-hydroxy-3-naphthoic acid, 1-hydroxy-5-naphthoic acid, and 2,7-naphthodiol. 2-hydroxy-6-naphthoic acid and 2,6-naphthoic dicarboxylic acid are preferred as the first monomer.

[0056] The polyester of this embodiment may further include a second monomer unit having a benzene ring but not a condensed aromatic ring.

[0057] The second single-unit may also be a single-unit conforming to single-unit (2-1), a single-unit conforming to single-unit (2-2), or a single-unit conforming to single-unit (2-3).

[0058] The second monomer unit can also be, for example, Ar. 1 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar5 The monomer unit (2-1) (hereinafter also referred to as monomer unit (2-1-2) of phenylene) can also be Ar. 2 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar 5 The monomer unit (2-2) of the phenylene group (hereinafter also referred to as monomer unit (2-2-2)) can also be Ar. 3 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar 5 The monomer unit (2-3) of the second monomer unit is phenylene (hereinafter also referred to as monomer unit (2-3-2)). 1 Ar 2 and Ar 3 Preferably, it is phenylene or biphenylene, more preferably 1,4-phenylene, 1,3-phenylene or 4,4'-biphenylene, and even more preferably 1,4-phenylene or 4,4'-biphenylene.

[0059] The second monomer unit can also be referred to as a monomer unit derived from a second monomer that has a benzene ring but does not have a condensed aromatic ring.

[0060] The second monomer can also be a monomer that conforms to monomer (1-1), a monomer that conforms to monomer (1-2), or a monomer that conforms to monomer (1-3).

[0061] The second monomer can also be, for example, Ar. 1 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar 5 The monomer (1-1) (hereinafter also referred to as monomer (1-1-2) is a phenylene oxide, and can also be Ar. 2 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar 5 The monomer (1-2) (hereinafter also referred to as monomer (1-2-2) of phenylene oxide can also be Ar. 3 It is a phenylene, biphenylene, or group represented by formula (Z-1) (wherein Ar) 4 and Ar 5 The monomer (1-3) is a phenylene group (hereinafter also referred to as monomer (1-3-2)). In the second monomer, Ar 1 Ar 2 and Ar 3Preferably, it is phenylene or biphenylene, more preferably 1,4-phenylene, 1,3-phenylene or 4,4'-biphenylene, and even more preferably 1,4-phenylene or 4,4'-biphenylene.

[0062] Examples of second monomers include p-hydroxybenzoic acid, m-hydroxybenzoic acid, hydroquinone, 4,4'-biphenyl, terephthalic acid, and isophthalic acid. The second monomer is preferably p-hydroxybenzoic acid, hydroquinone, 4,4'-biphenyl, or terephthalic acid.

[0063] Liquid crystal polyesters may also have monomer units other than monomer units (2-1), monomer units (2-2), and monomer units (2-3), but their content relative to the total of all monomer units can be, for example, less than 10 mol%, less than 5 mol%, less than 3 mol%, less than 1 mol%, or even 0 mol%. That is, in liquid crystal polyesters, the total content of monomer units (2-1), monomer units (2-2), and monomer units (2-3) relative to the total of all monomer units can be, for example, more than 90 mol%, more than 95 mol%, more than 97 mol%, more than 99 mol%, or even 100 mol%.

[0064] Liquid crystal polyesters may also contain monomers other than the first monomer unit and the second monomer unit, but their content relative to the total of all monomer units can be, for example, less than 10 mol%, less than 5 mol%, less than 3 mol%, less than 1 mol%, or even 0 mol%. That is, in liquid crystal polyesters, the total content of the first monomer unit and the second monomer unit relative to the total of all monomer units can be, for example, more than 90 mol%, more than 95 mol%, more than 97 mol%, more than 99 mol%, or even 100 mol%.

[0065] Liquid crystal polyester can be mainly composed of monomer units (2-1), or it can include monomer units (2-1), monomer units (2-2) and monomer units (2-3).

[0066] When the liquid crystal polyester is mainly composed of monomer units (2-1), the content of monomer units (2-1) relative to the total of all monomer units can be, for example, 90 mol% or more, 95 mol% or more, 97 mol% or more, or 99 mol% or more, or 100 mol%.

[0067] When the liquid crystal polyester includes monomer unit (2-1), monomer unit (2-2) and monomer unit (2-3), the total content of monomer unit (2-1), monomer unit (2-2) and monomer unit (2-3) relative to the total of all monomer units can be, for example, 90 mol% or more, 95 mol% or more, 97 mol% or more, or 99 mol% or more, or 100 mol%.

[0068] When the liquid crystal polyester contains monomer unit (2-1), monomer unit (2-2) and monomer unit (2-3), the content of monomer unit (2-2) and the content of monomer unit (2-3) can be approximately the same (for example, the difference is less than 3 mol%, less than 1 mol%, less than 0.5 mol%, or less than 0.1 mol%).

[0069] When the liquid crystal polyester comprises monomer unit (2-1), monomer unit (2-2), and monomer unit (2-3), the content of monomer unit (2-1) relative to the total of all monomer units can be, for example, 30 mol% or more, or 40 mol% or more, 50 mol% or more, 60 mol% or more, or 70 mol% or more. Furthermore, when the liquid crystal polyester comprises monomer (2-1), monomer unit (2-2), and monomer unit (2-3), the content of monomer unit (2-1) relative to the total of all monomer units can be, for example, 99 mol% or less, or 95 mol% or less, or 90 mol% or less.

[0070] When the liquid crystal polyester comprises monomer unit (2-1), monomer unit (2-2), and monomer unit (2-3), the content of monomer unit (2-2) and the total content of monomer unit (2-3) relative to the total of all monomer units can, for example, be 1 mol% or more, or 5 mol% or more, or 10 mol% or more. Furthermore, when the liquid crystal polyester comprises monomer (2-1), monomer unit (2-2), and monomer unit (2-3), the content of monomer unit (2-2) and the total content of monomer unit (2-3) relative to the total of all monomer units can, for example, be 70 mol% or less, or 60 mol% or less, 50 mol% or less, 40 mol% or less, or 30 mol% or less.

[0071] The content of the first monomer unit in the liquid crystal polyester is 20 mol% or more relative to the total of all monomer units, and can also be 30 mol% or more, 40 mol% or more, 50 mol% or more, 60 mol% or more, or 70 mol% or more. A higher content of the first monomer unit tends to result in improved dielectric properties. Furthermore, liquid crystal polyesters with a higher content of the first monomer unit have higher orientation, making them prone to wrinkling when film-formed alone. In the resin composition of this embodiment, even when using a liquid crystal polyester with a higher content of the first monomer unit, wrinkle formation can be significantly suppressed for the reasons described above. The content of the first monomer unit relative to the total of all monomer units can, for example, be 90 mol% or less, 85 mol% or less, or 80 mol% or less. This tends to improve moldability and processability at low temperatures.

[0072] When the liquid crystal polyester contains a second monomer unit, the content of the second monomer unit relative to the total of all monomer units can be, for example, 10 mol% or more, 15 mol% or more, or 20 mol% or more. A higher content of the second monomer unit tends to result in better moldability and processability at low temperatures. The content of the second monomer unit relative to the total of all monomer units can be 80 mol% or less, or it can be 70 mol% or less, 60 mol% or less, 50 mol% or less, 40 mol% or less, or 30 mol% or less.

[0073] As a first monomer unit, the liquid crystal polyester may include at least one selected from the group consisting of monomer unit (2-1-1), monomer unit (2-2-1), and monomer unit (2-3-1), or at least one selected from the group consisting of monomer unit (2-1-1) and monomer unit (2-3-1). Furthermore, as a first monomer unit, the liquid crystal polyester preferably includes at least monomer unit (2-1-1).

[0074] The proportion of the monomer unit (2-1-1) in the first monomer unit can be, for example, 50 mol% or more, or 60 mol% or more, 70 mol% or more, or 75 mol% or more. The proportion of the monomer unit (2-1-1) in the first monomer unit can also be 100 mol%.

[0075] In the first embodiment, the liquid crystal polyester may include monomer units (2-1-1) and monomer units (2-3-1) as the first monomer unit.

[0076] In the first embodiment, the proportion of the monomer unit (2-1-1) in the first monomer unit may be, for example, 50 mol% or more, or 60 mol% or more, 70 mol% or more, or 75 mol% or more. Furthermore, the proportion of the monomer unit (2-1-1) in the first monomer unit may be, for example, 99 mol% or less, or 97 mol% or less, 95 mol% or less, or 90 mol% or less.

[0077] In the first embodiment, the proportion of the monomer unit (2-3-1) in the first monomer unit may be, for example, 1 mol% or more, or 3 mol% or more, 5 mol% or more, or 10 mol% or more. Furthermore, the proportion of the monomer unit (2-3-1) in the first monomer unit may be, for example, 50 mol% or less, or 40 mol% or less, 30 mol% or less, or 25 mol% or less.

[0078] The liquid crystal polyester may include at least one selected from the group consisting of monomer units (2-1-2), monomer units (2-2-2), and monomer units (2-3-2) as a second monomer unit.

[0079] In the first embodiment, the liquid crystal polyester may also include monomer units (2-1-2), monomer units (2-2-2), and monomer units (2-3-2) as second monomer units.

[0080] In the first embodiment, the proportion of the monomer unit (2-1-2) in the second monomer unit relative to the total of all monomer units can be, for example, 0 mol% or more, 10 mol% or more, or 20 mol% or more. Furthermore, the proportion of the monomer unit (2-1-2) in the second monomer unit relative to the total of all monomer units can be, for example, 90 mol% or less, 85 mol% or less, 80 mol% or less, or 70 mol% or less.

[0081] In the first embodiment, the proportion of the monomer unit (2-2-2) in the second monomer unit relative to the total of all monomer units can be, for example, 0 mol% or more, 10 mol% or more, or 20 mol% or more. Furthermore, the proportion of the monomer unit (2-2-2) in the second monomer unit relative to the total of all monomer units can be, for example, 70 mol% or less, 60 mol% or less, or 50 mol% or less.

[0082] In the first embodiment, the proportion of the monomer unit (2-3-2) in the second monomer unit relative to the total of all monomer units can be, for example, 0 mol% or more, 5 mol% or more, or 10 mol% or more. Furthermore, the proportion of the monomer unit (2-3-2) in the second monomer unit relative to the total of all monomer units can be, for example, 40 mol% or less, 30 mol% or less, or 20 mol% or less.

[0083] In this specification, the number of each monomer unit in the liquid crystal polyester is determined using the analytical method described in Japanese Patent Application Publication No. 2000-19168. Specifically, by reacting the liquid crystal polyester with a lower alcohol in a supercritical state to depolymerize it, and by quantifying the depolymerization products (monomers from which each monomer unit is derived) using liquid chromatography, the number of each monomer unit relative to all monomer units can be calculated.

[0084] Liquid crystal polyesters can be manufactured by polymerizing raw material monomers corresponding to the monomer units constituting them. For example, they can be manufactured according to the method described in Japanese Patent No. 6439027.

[0085] The flow initiation temperature of liquid crystal polyester can be, for example, above 250°C, or above 260°C, 270°C, or 280°C. The flow initiation temperature of liquid crystal polyester can be, for example, below 400°C, or below 360°C, 350°C, or 340°C.

[0086] In this specification, the flow start temperature of the liquid crystal polyester is determined using a flow tester. This is achieved by melting the liquid crystal polyester while heating it at a rate of 4°C / min under a load of 9.8 MPa, extruding the molten liquid crystal polyester through a nozzle with an inner diameter of 1 mm and a length of 10 mm, and observing a viscosity of 4800 Pa·s.

[0087] The melting point (Tm) of liquid crystal polyester can be, for example, above 250°C, or above 260°C, above 270°C, above 280°C, or above 285°C. Furthermore, the melting point (Tm) of liquid crystal polyester can be, for example, below 400°C, or below 360°C, below 350°C, or below 340°C.

[0088] In this specification, the melting point of the liquid crystal polyester was determined using a differential scanning calorimeter (DSC-60 Plus, manufactured by Shimadzu Corporation) based on JIS K7121. Specifically, 10 mg of the liquid crystal polyester was placed in a sample container and heated from room temperature to 350°C at a rate of 10°C / min, and held at 350°C for 10 minutes. Then, it was cooled to 50°C at a rate of 10°C / min and held at 50°C for 10 minutes. The position of the endothermic peak that appeared when the temperature was subsequently increased again at a rate of 10°C / min was then defined as the melting point (Tm) of the liquid crystal polyester.

[0089] The dielectric loss tangent of the liquid crystal polyester at 10 GHz can be, for example, less than 0.002, less than 0.0015, less than 0.0012, or less than 0.0010. Thus, it becomes easy to obtain a liquid crystal polyester composition having the preferred dielectric loss tangent described later.

[0090] The specific dielectric constant of liquid crystal polyester at 10 GHz can be, for example, below 4.0 or below 3.8. The specific dielectric constant of liquid crystal polyester at 28 GHz can be, for example, above 2.8 or above 3.0.

[0091] In this specification, the dielectric loss tangent and specific dielectric constant of the liquid crystal polyester at 10 GHz are determined by the following method.

[0092] For thin-walled test pieces of liquid crystal polyester, a vector network analyzer (Keysight Technologies, N529A) and a split cylindrical resonator (EM Labs, CR710) were used to determine the specific dielectric constant and dielectric loss tangent at 10 GHz. Thin-walled test pieces can be, for example, injection-molded parts, melt-extruded films, or pressed sheets. It should be noted that the measurement environment was set at 23°C and 50% RH.

[0093] In the resin composition of this embodiment, the content of liquid crystal polyester, based on the total amount of the resin composition, can be, for example, 80% by mass or more, or 85% by mass or more, 90% by mass or more, 92% by mass or more, 94% by mass or more, 96% by mass or more, or 98% by mass or more. Furthermore, the content of liquid crystal polyester, based on the total amount of the resin composition, can be, for example, 99.5% by mass or less, or 99% by mass or less, 98.5% by mass or less, or 98% by mass or less.

[0094] It should be noted that the upper limit of the liquid crystal polyester content can also be the sum of the lower limit of the content of components other than the liquid crystal polyester, which is 100% by mass. For example, when the liquid crystal polyester in this embodiment contains more than 100% by mass of amorphous polyarylate and more than 100% by mass of carbodiimide compound, the content of liquid crystal polyester can be less than 100% by mass of (A+B).

[0095] Amorphous polyarylates can be, for example, amorphous aromatic polyesters having diphenol residues (also known as monomer units derived from diphenols) and diacid residues (also known as monomer units derived from diacids). Amorphous polyarylates can also be, for example, condensation polymers of diphenols and diacids.

[0096] Amorphous polyarylates may also contain one or more diphenol residues. In addition, amorphous polyarylates may also contain one or more dicarboxylic acid residues.

[0097] The diphenol residues can be, for example, compounds represented by the following formula (i).

[0098] [Chemical Formula 1] In equation (i), R 1 R represents a divalent group. 2 R 3 R 4 and R 5 Each can be independently represented by a hydrogen atom, a halogen group, a hydrocarbon group, or a nitro group.

[0099] R 2 R 3 R 4 and R 5 The halogen group can be, for example, fluorine (-F), chlorine (-Cl), bromine (-Br) or iodine (-I), or it can be fluorine or chlorine, or it can be fluorine.

[0100] R 2 R 3 R 4 and R 5 The hydrocarbon group can be, for example, an aliphatic group with 1 to 20 carbon atoms, an alicyclic group with 3 to 20 carbon atoms, or an aromatic group with 6 to 20 carbon atoms.

[0101] R 1 For example, it can be an oxygen atom (-O-), an oxygen atom (-O-), a sulfur atom (-S-), a carbonyl group (-CO-), a sulfonyl group (-SO2-), or a -C(R) group. 11 (R) 12 The group represented by - is preferably -C(R) 11 (R) 12 The group represented by )-.

[0102] R 11 and R 12 R represents, independently, a hydrogen atom, a halogen group, or a hydrocarbon group that may have substituents. 11 and R 12 They can also form rings by bonding with each other through direct bonding, ether bonding, carbonyl bonding, ester bonding, or amide bonding.

[0103] R 11 and R 12 The halogen group can be, for example, fluorine (-F), chlorine (-Cl), bromine (-Br) or iodine (-I), or it can be fluorine or chlorine, or it can be fluorine.

[0104] R 11 and R 12 The hydrocarbon group can be, for example, an aliphatic group with 1 to 20 carbon atoms, an alicyclic group with 3 to 20 carbon atoms, or an aromatic group with 6 to 20 carbon atoms.

[0105] As R 11 and R 12 The hydrocarbon group in the text may have substituents, such as halogen groups, hydrocarbon groups, nitro groups, etc. Examples of halogen and hydrocarbon groups are the same groups as those described above.

[0106] R 11 and R 12 The bonds used to form the ring are preferably direct bonds or amide bonds, but direct bonds are also acceptable.

[0107] Diphenol residues can be referred to as monomer units derived from diphenols.

[0108] Diphenols can be, for example, compounds represented by the following formula (ii).

[0109] [Chemical Formula 2] In equation (ii), R 1 R 2 R 3 R 4 and R 5 Respectively with R in equation (i) 1 R 2 R 3 R 4 and R 5 They have the same meaning.

[0110] Examples of diphenols represented by formula (ii) include 4,4'-dihydroxydiphenylmethane, 1,1-bis(4-hydroxyphenyl)ethane, and 2,2-(4-hydroxyphenyl)propane (also known as bisphenol A).), 2,2-(4-hydroxyphenyl)butane, 2,2,-(4-hydroxyphenyl)-4-methylpentane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)butane, 2,2-bis(4-hydroxy-3-methylphenyl)-4-methylpentane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)butane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)-4-pentane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, 9,9-bis(4 9,9-Bis(4-hydroxy-3-methylphenyl)fluorene, 9,9-Bis(4-hydroxy-3,5-dimethylphenyl)fluorene, 9,9-Bis(4-hydroxy-3-phenylphenyl)fluorene, 3,3-Bis(4-hydroxyphenyl)benzopyrrolidone, N-phenyl-3,3-bis(4-hydroxyphenyl)benzopyrrolidone, N-methyl-3,3-bis(4-hydroxyphenyl)benzopyrrolidone, N-ethyl-3,3-bis(4-hydroxyphenyl)benzopyrrolidone, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxy-3-methylphenyl)cyclohexane, 1,1-bis(4-hydroxy-3,5-dimethylphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)cyclohexane 1,1-Bis(4-hydroxyphenyl)cyclopentane, 1,1-Bis(4-hydroxy-3-methylphenyl)cyclopentane, 1,1-Bis(4-hydroxy-3,5-dimethylphenyl)cyclopentane, 1,1-Bis(4-hydroxy-3-phenylphenyl)cyclopentane, 1,1-Bis(4-hydroxy-3-phenylphenyl)cyclopentane, 1,1-Bis(4-hydroxyphenyl)cyclododecane, 1,1-Bis(4-hydroxy-3-methylphenyl)cyclododecane, 1,1-Bis(4-hydroxy-3,5-dimethylphenyl)cyclododecane, 1,1-Bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 1,1-Bis(4-hydroxy-3-methylphenyl)-3,3,5-trimethylcyclohexane, 1,1-Bis(4-hydroxy ... Examples of cyclohexane include bis(4-hydroxy-3-phenylphenyl)-3,3,5-trimethylcyclohexane, bis(4-hydroxyphenyl)phenylmethane, bis(4-hydroxy-3-methylphenyl)phenylmethane, bis(4-hydroxy-3,5-dimethylphenyl)phenylmethane, bis(4-hydroxy-3-phenylphenyl)phenylmethane, bis(4-hydroxy-3-phenylphenyl)phenylmethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 1,1-bis(4-hydroxy-3-methylphenyl)-1-phenylethane, 1,1-bis(4-hydroxy-3,5-dimethylphenyl)-1-phenylethane, and 1,1-bis(4-hydroxy-3-phenylphenyl)-1-phenylethane.

[0111] Amorphous polyarylates may also contain diol residues other than the aforementioned diphenol residues. Examples of diol residues include dihydroxybenzene residues and aliphatic diol residues.

[0112] Examples of dihydroxybenzenes include hydroquinone, resorcinol, and catechol. Examples of aliphatic diols include ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, nonanediol, decanediol, cyclohexanediol, ethylene oxide adducts of bisphenol A, propylene oxide adducts of bisphenol A, and ethylene oxide adducts of bisphenol S.

[0113] As a dicarboxylic acid residue, an aromatic dicarboxylic acid residue is preferred. An aromatic dicarboxylic acid residue can be referred to as a monomeric unit derived from an aromatic dicarboxylic acid.

[0114] Examples of aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, chlorophthalic acid, nitrophthalic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, methyl terephthalic acid, 4,4'-biphenyl dicarboxylic acid, 2,2'-biphenyl dicarboxylic acid, 4,4'-diphenyl ether dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenyl sulfone dicarboxylic acid, 4,4'-diphenylisopropylidene dicarboxylic acid, 1,2-bis(4-carboxyphenoxy)ethane, and sodium 5-sulfoisophthalate.

[0115] As aromatic dicarboxylic acids, terephthalic acid and isophthalic acid are preferred, and a mixture of terephthalic acid and isophthalic acid is more preferred. The ratio of terephthalic acid to the total of terephthalic acid and isophthalic acid can be, for example, 20 to 80 mol%, 25 to 70 mol%, or 30 to 60 mol%.

[0116] Dicarboxylic acid residues can also include aliphatic dicarboxylic acid residues. Aliphatic dicarboxylic acid residues can be referred to as monomeric units derived from aliphatic dicarboxylic acids. Examples of aliphatic dicarboxylic acids include dicarboxymethylcyclohexane, cyclohexanedicarboxylic acid, adipic acid, sebacic acid, glutaric acid, and dodecanoic acid.

[0117] Amorphous polyarylates can also be further endowed with monofunctional carboxylic acid residues, monofunctional phenol residues, monofunctional alcohol residues, etc. Monofunctional carboxylic acids, monofunctional phenols, and monofunctional alcohols are used as molecular weight modifiers.

[0118] Examples of monofunctional carboxylic acids include acetic acid, propionic acid, octanoic acid, cyclohexanecarboxylic acid, benzoic acid, toluic acid, p-tert-butylbenzoic acid, and p-methoxyphenylacetic acid. Examples of monofunctional phenols include phenol, cresol, p-tert-butylphenol, nonylphenol, o-phenylphenol, and cumylphenol. Examples of monofunctional alcohols include methanol, ethanol, n-propanol, isopropanol, n-butanol, pentanol, hexanol, dodecyl alcohol, stearyl alcohol, benzyl alcohol, and phenethyl alcohol.

[0119] The glass transition temperature (Tg) of amorphous polyarylates is above 200°C. From the viewpoint of obtaining the above-mentioned effects more significantly, it can also be above 215°C, above 230°C, above 250°C, or above 270°C. The glass transition temperature (Tg) of amorphous polyarylates can be, for example, below 320°C, below 300°C, or below 290°C.

[0120] In this specification, the glass transition temperature of amorphous polyarylates is determined by the method specified in JIS K 7121.

[0121] The difference (Tm-Tg) between the melting point (Tm) of the liquid crystal polyester and the glass transition temperature (Tg) of the amorphous polyaryl ester can be, for example, below 120°C, or below 100°C, 80°C, 60°C, 50°C, or 40°C. If the difference (Tm-Tg) is small, there is a tendency to obtain a more significant effect in suppressing the formation of the aforementioned wrinkles.

[0122] In the resin composition of this embodiment, the content of amorphous polyarylate relative to 100 parts by weight of liquid crystal polyester can be, for example, 0.1 parts by weight or more, 0.5 parts by weight or more, 1 part by weight or more, or 1.5 parts by weight or more. A higher content of amorphous polyarylate tends to result in a more significant effect in suppressing the formation of the aforementioned wrinkles. Furthermore, the content of amorphous polyarylate relative to 100 parts by weight of liquid crystal polyester can be, for example, 20 parts by weight or less, 15 parts by weight or less, 10 parts by weight or less, 8 parts by weight or less, or 6 parts by weight or less. A lower content of amorphous polyarylate tends to result in better media properties of the resin composition.

[0123] The resin composition of this embodiment may further comprise a carbodiimide compound. The carbodiimide compound may also react, in part or in whole, with liquid crystal polyester and / or amorphous polyarylate to form a reactant.

[0124] It should be noted that in this specification, "the resin composition contains a carbodiimide compound" also includes cases where the resin composition contains a carbodiimide compound reacting with other components. In this case, "the content of the carbodiimide compound" represents the total amount of unreacted carbodiimide compound and the portion of carbodiimide compound derived from the reactants.

[0125] If the resin composition of this embodiment contains a carbodiimide compound, the formation of wrinkles can be suppressed more significantly.

[0126] The reason for this effect may not be clear, but it is believed to be as follows. It is believed that when the resin composition of this embodiment contains liquid crystal polyester, amorphous polyarylate and carbodiimide compound, the carbodiimide compound will increase the affinity between liquid crystal polyester and amorphous polyarylate, and the liquid crystal polyester and amorphous polyarylate will cure more uniformly, thereby more significantly suppressing the formation of wrinkles during molding.

[0127] Carbodiimide compounds are compounds having a carbodiimide group (-N=C=N-). Carbodiimide compounds can have one carbodiimide group or multiple carbodiimide groups.

[0128] Carbodiimide compounds may further have polar groups other than the carbodiimide group. Carbodiimide compounds may also have isocyanate groups, for example. Aliphatic carbodiimide compounds described later may also have isocyanate groups, or may have isocyanate groups at both ends.

[0129] Examples of carbodiimide compounds include aliphatic carbodiimide compounds, aromatic carbodiimide compounds, and cyclic carbodiimide compounds.

[0130] Aliphatic carbodiimide compounds are compounds having an aliphatic hydrocarbon group and a carbodiimide group bonded to the aliphatic hydrocarbon group. Aliphatic carbodiimide compounds can also have a chain structure formed by alternating bonds of carbodiimide groups and aliphatic hydrocarbon groups.

[0131] Examples of aliphatic carbodiimide compounds include those having the structure represented by formula (A).

[0132] [Chemical Formula 3] [In the formula, R] a This represents a dialkyl alkane, where n represents an integer greater than or equal to 1. The alkane dimethyl group can be, for example, an alkane dimethyl group with 1 to 10 carbon atoms, or an alkane dimethyl group with 1 to 4 carbon atoms. Examples of alkane dimethyl groups include methylene, ethylene, 1,3-propanediyl, and 1,4-butanediyl.

[0133] n represents an integer greater than or equal to 1, such as greater than or equal to 2, 5, 10, or 15. n can also be less than or equal to 50, 40, or 30.

[0134] Aliphatic carbodiimide compounds can be, for example, compounds represented by the following formula (A-1).

[0135] [Chemical Formula 4] [In the formula, R] a And n has the same meaning as above. As aliphatic carbodiimide compounds, commercially available products can be used, for example. Other aliphatic carbodiimide compounds that can be used include: CARBODILITE HMV-15CA (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE HMV-8CA (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE LA-1 (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE V-02B (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE V-03 (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE V-04K (manufactured by Nisshinbo Chemical Co., Ltd.), CARBODILITE V-07 (manufactured by Nisshinbo Chemical Co., Ltd.), and CARBODILITE V-09 (manufactured by Nisshinbo Chemical Co., Ltd.).

[0136] Aromatic carbodiimide compounds are compounds having an aromatic ring and a carbodiimide group bonded to that aromatic ring. Aromatic carbodiimide compounds can also have a structure in which the carbodiimide group is alternately bonded to an aromatic hydrocarbon group.

[0137] Aromatic carbodiimide compounds preferably have a benzene ring as their aromatic ring.

[0138] Aromatic carbodiimide compounds include, for example, compounds having the structure represented by the following formula (B).

[0139] [Chemical Formula 5] [In the formula, Ar] b This represents phenylene, and m represents an integer greater than or equal to 1. Ar bSome or all of the hydrogen atoms may be replaced by halogen atoms, alkyl groups, or aryl groups. The phenylene groups can be, for example, 1,3-phenylene or 1,4-phenylene, preferably 1,3-phenylene. They may also have substituents.

[0140] Halogen atoms that can be used as substituents include fluorine, chlorine, bromine, and iodine. Halogen atoms that can be used as substituents can also be fluorine, chlorine, or bromine atoms, or they can be either fluorine or chlorine atoms, or they can be fluorine atoms.

[0141] The alkyl group used as a substituent can be straight-chain, branched, or cyclic. For example, the alkyl group can be an alkyl group having 1 to 10 carbon atoms. Examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-hexyl, 2-ethylhexyl, n-octyl, and n-decyl.

[0142] The aryl group used as a substituent can be either monocyclic or condensed. For example, aryl groups can have 6 to 20 carbon atoms. Examples of aryl groups include phenyl, o-tolyl, m-tolyl, p-tolyl, 1-naphthyl, and 2-naphthyl. Aryl groups can also be groups obtained by substituting the hydrogen atoms of the aromatic ring with alkyl groups, such as tolyl.

[0143] Ar b The number of substituents can be, for example, 0 to 3.

[0144] As Ar b Examples include 2,4,6-triisopropyl-1,3-phenylene.

[0145] As aromatic carbodiimide compounds, commercially available products can be used, for example. Other aromatic carbodiimide compounds that can be used include, for example, STABAXOL (registered trademark) P (manufactured by LANXESS Co., Ltd.), STABAXOL (registered trademark) P100 (manufactured by LANXESS Co., Ltd.), STABAXOL (registered trademark) P400 (manufactured by LANXESS Co., Ltd.), STABAXOL (registered trademark) I (manufactured by LANXESS Co., Ltd.), and CARBODILITE V-05 (manufactured by Nisshinbo Chemical Co., Ltd.).

[0146] Cyclic carbodiimide compounds are compounds that have a ring structure, with a portion of that ring structure being a carbodiimide group. In other words, cyclic carbodiimide compounds can also be referred to as compounds with a ring structure containing a carbodiimide group.

[0147] Examples of cyclic carbodiimide compounds include compounds represented by formula (C-1) and compounds represented by formula (C-2).

[0148] [Chemical Formula 6] [Chemical Formula 7] As a cyclic carbodiimide compound, commercially available products can be used, for example. CARBOSISTA (registered trademark) TCC-NP (manufactured by Teijin Corporation) and other similar compounds can also be used as cyclic carbodiimide compounds.

[0149] In the resin composition of this embodiment, the content of the carbodiimide compound relative to 100 parts by weight of the liquid crystal polyester can be, for example, 0.01 parts by weight or more, or 0.03 parts by weight or more, 0.05 parts by weight or more, 0.07 parts by weight or more, 0.09 parts by weight or more, or 0.1 parts by weight or more. A higher content of the carbodiimide compound tends to result in a more significant effect in suppressing the formation of the aforementioned wrinkles. Furthermore, the content of the carbodiimide compound relative to 100 parts by weight of the liquid crystal polyester can be, for example, 5 parts by weight or less, or 4 parts by weight or less, 3 parts by weight or less, 2 parts by weight or less, 1 part by weight or less, or 0.5 parts by weight or less. A lower content of the carbodiimide compound tends to result in improved dielectric properties.

[0150] The resin composition of this embodiment may further contain other organic components besides those described above.

[0151] The resin composition of this embodiment may further include resins other than liquid crystal polyesters and amorphous polyarylates. Examples of such resins include polyolefins, cyclic polyolefins, polyvinyl chloride, polysulfone, (meth)acrylic resins, polyphenylene ether resins, polyacetal resins, polyamide resins, imide resins, cellulose resins, polyetheretherketone resins, fluororesins, polycarbonate resins, styrene-based resins, and thermosetting resins.

[0152] The resin composition of this embodiment may further include colorants, dispersants, plasticizers, antioxidants, curing agents, flame retardants, heat stabilizers, ultraviolet absorbers, antistatic agents, surfactants, lubricants, release agents, etc.

[0153] The content of other organic components in the resin composition of this embodiment may be, for example, less than 15% by mass, less than 10% by mass, less than 5% by mass, less than 3% by mass, or less than 1% by mass, or may be 0% by mass.

[0154] The resin composition of this embodiment may further include inorganic fillers. Examples of inorganic fillers include titanium dioxide and silicon dioxide.

[0155] The content of inorganic filler in the resin composition of this embodiment is not particularly limited and can be adjusted appropriately according to the application. For example, the content of inorganic filler in the resin composition of this embodiment can be 15% by mass or less, 10% by mass or less, 5% by mass or less, 3% by mass or less, or 1% by mass or less, or even 0% by mass.

[0156] The resin composition of this embodiment may also be a mixture of raw material components containing liquid crystal polyester and amorphous polyarylate. The resin composition of this embodiment may also be a melt-blended compound containing raw material components containing liquid crystal polyester and amorphous polyarylate.

[0157] The raw material may further contain carbodiimide compounds. In this case, the liquid crystal polyester and carbodiimide compounds can also react to form a cross-linked structure in the mixture and melt compound.

[0158] The raw material composition may further contain other organic components besides liquid crystal polyester, amorphous polyarylate, and carbodiimide compounds. The raw material composition may also further contain inorganic fillers. Examples of other organic components and inorganic fillers that may be included in the raw material composition are substances identical to those included in the resin composition described above.

[0159] Examples of the ranges of the content of each component in the raw material composition can be shown as the same ranges as the content of each component in the resin composition described above.

[0160] There are no particular limitations on the mixing method of the raw material components, and known methods can be used without particular restrictions. Examples of mixing methods include melt blending. In particular, when the raw material components contain a carbodiimide compound, melt blending is preferred from the viewpoint that the reaction between the end groups of the liquid crystal polyester and the carbodiimide groups of the carbodiimide compound is easy to carry out and that a preferred crosslinking structure can be easily formed through this reaction.

[0161] For example, a melt blend of raw material components can be obtained by blending the raw material components at a temperature T1 above the flow start temperature (FT) of the liquid crystal polyester.

[0162] The difference between the flow start temperature FT (°C) and the temperature T1 (°C) of the liquid crystal polyester (T1-FT) can be, for example, 5°C or more, and from the viewpoint of more uniform mixing of raw material components, it can also be 10°C or more, or 20°C or more. The above difference (T1-FT) can be, for example, 80°C or less, and from the viewpoint of suppressing the decomposition of raw material components, it can also be 70°C or less, 60°C or less, or 50°C or less.

[0163] The resin composition of this embodiment has excellent melt flowability, and therefore can be suitably used as a molding material. For example, the resin composition of this embodiment can be used as granules.

[0164] The melting point of the resin composition in this embodiment can be, for example, 250°C or higher, or 260°C or higher, 270°C or higher, 280°C or higher, or 285°C or higher. A higher melting point of the resin composition further improves its heat resistance. The melting point of the resin composition in this embodiment can be, for example, 400°C or lower, or 360°C or lower, 350°C or lower, or 340°C or lower. A lower melting point of the resin composition makes molding and processing easier.

[0165] The molded article of this embodiment comprises the liquid crystal polyester composition described above.

[0166] The molded article of this embodiment can be a molded article formed by a molding method that generates a flow direction (MD) and a vertical direction (TD). Since the molded article of this embodiment contains the above-described liquid crystal polyester composition, wrinkle formation can be suppressed even when molded by a molding method that generates a flow direction (MD) and a vertical direction (TD). Examples of such molding methods include injection molding, blow molding, T-die molding, blow molding, and calendering.

[0167] The molded articles of this embodiment can be, for example, connectors, sockets, membranes, relay components, coil frames, optical pickups, oscillators, semiconductor packages, IC trays, wafer carriers, household appliance components, lighting fixture components, audio product components, optical cable ferrules, telephone components, fax components, modem components, release claws, heater brackets, impellers, fan gears, gears, bearings, motor components, motor housings, engine components, engine compartment components, electrical components, automotive interior components, microwave cooking pots, heat-resistant tableware, flooring materials, wall materials, beams, columns, roofing materials, aircraft components, spacecraft components, aerospace equipment components, nuclear reactors, marine facility components, washing fixtures, optical equipment components, valves, pipes, nozzles, filters, medical equipment components, medical materials, sensor components, hygiene supplies, sporting goods, or leisure goods.

[0168] The molded article in this embodiment can be, for example, a film. Since films are molded articles that are prone to wrinkling during molding, in this embodiment, even if the molded article is a film, the generation of wrinkles during molding can be sufficiently suppressed.

[0169] The preferred embodiments of this disclosure have been described above, but this disclosure is not limited to the above embodiments.

[0170] Example The present disclosure will be described in more detail below through embodiments, but the present disclosure is not limited to these embodiments.

[0171] (Example 1) (a) Manufacturing of liquid crystal polyester (a-1) To a reactor equipped with a stirrer, torque meter, nitrogen inlet pipe, thermometer, and reflux cooler, 1035.0 g (5.5 mol) of 6-hydroxy-2-naphthoic acid, 255.2 g (2.3 mol) of hydroquinone, 378.3 g (1.75 mol) of 2,6-naphthalenedicarboxylic acid, 83.1 g (0.5 mol) of terephthalic acid, 1226.87 g (12 mol) of acetic anhydride, and 0.175 g of 1-methylimidazole as a catalyst were added. The mixture was stirred at room temperature for 15 minutes, then heated to 140°C over 30 minutes with stirring under a nitrogen stream. The mixture was then refluxed at this temperature for 1 hour.

[0172] Next, while distilling away the distillate byproducts of acetic acid and unreacted acetic anhydride, the temperature was increased from 140°C to 310°C over 4 hours and 35 minutes. The reaction was considered complete when the torque was confirmed to be rising, and the contents were removed. The resulting solid was cooled to room temperature and pulverized using a pulverizer to obtain an aromatic polyester powder (particle size of approximately 0.1 mm to approximately 1 mm). The flow onset temperature (FT) of this powder was measured using a flow meter and found to be 270°C.

[0173] The obtained powder was heated from room temperature to 225°C over 1 hour, then from 225°C to 250°C over 1 hour and 40 minutes, and then from 250°C to 306°C over 9 hours and 20 minutes. This temperature was then maintained at 306°C for 6 hours to induce solid-state polymerization. The solid-state polymerized powder was then cooled to obtain liquid crystal polyester (a-1). The flow start temperature (FT) of the obtained liquid crystal polyester (a-1) was 330°C.

[0174] (b) Manufacturing of liquid crystal polyester (a-2) 1511.1 g (8.03 mol) of 6-hydroxy-2-naphthoic acid, 410.2 g (2.97 mol) of p-hydroxybenzoic acid, 1291.4 g (12.65 mol) of acetic anhydride, and 0.058 g of 1-methylimidazole as a catalyst were added to a reactor equipped with a stirrer, torque meter, nitrogen inlet pipe, thermometer, and reflux cooler. After stirring at room temperature for 15 minutes, the temperature was raised to 140°C over 30 minutes while stirring under a nitrogen flow. The reactor was then refluxed at this temperature for 1 hour.

[0175] Next, while distilling away the distillate byproducts of acetic acid and unreacted acetic anhydride, the temperature was increased from 140°C to 275°C over 2 hours and 50 minutes. The reaction was considered complete when the torque began to rise, and the contents were removed. The resulting solid was cooled to room temperature and pulverized using a pulverizer to obtain an aromatic polyester powder (particle size approximately 0.1 mm to approximately 1 mm). The flow onset temperature (FT) of this powder was measured using a flow meter and found to be 217°C.

[0176] The obtained powder was heated from room temperature to 190°C over 1 hour and 10 minutes, and then heated from 190°C to 258°C over 9 hours and 50 minutes. This 258°C temperature was then maintained for 10 hours to induce solid-state polymerization. The solid-state polymerized powder was then cooled to obtain liquid crystal polyester (a-2). The flow start temperature (FT) of the obtained liquid crystal polyester (a-2) was 318°C.

[0177] (c) Preparation of liquid crystal polyester (A) 60 parts by weight of liquid crystal polyester (a-1) and 40 parts by weight of liquid crystal polyester (a-2) were dry-blended and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain liquid crystal polyester (A). The melting point (Tm) of the obtained liquid crystal polyester was 313°C.

[0178] (d) Preparation of resin composition 98 parts by weight of liquid crystal polyester (A) and 2 parts by weight of amorphous polyarylate (B-1) (U POLYMER (registered trademark) G-L4, manufactured by UNITIKA Co., Ltd., glass transition temperature (Tg): 220°C) were mixed and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain a resin composition.

[0179] (Example 2) 98 parts by weight of liquid crystal polyester (A) and 2 parts by weight of amorphous polyarylate (B-2) (U POLYMER (registered trademark) G-D10, manufactured by UNITIKA Co., Ltd., glass transition temperature (Tg): 275°C) were mixed and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain a resin composition.

[0180] (Example 3) 95 parts by weight of liquid crystal polyester (A) and 5 parts by weight of amorphous polyarylate (B-2) (U POLYMER (registered trademark) G-D10, manufactured by UNITIKA Co., Ltd., glass transition temperature (Tg): 275°C) were mixed and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain a resin composition.

[0181] (Example 4) 97.9 parts by weight of liquid crystal polyester (A) and 2 parts by weight of amorphous polyarylate (B-2) (U POLYMER (registered trademark) G-D10, manufactured by UNITIKA Co., Ltd., glass transition temperature (Tg): 275°C) and 0.1 parts by weight of cyclic carbodiimide compound (CARBOSISTA TCC-NP, manufactured by Teijin Co., Ltd.) were mixed and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain a resin composition.

[0182] (Comparative Example 1) Only liquid crystal polyester (A) is used as the resin composition.

[0183] (Comparative Example 2) 98 parts by weight of liquid crystal polyester (A) and 2 parts by weight of amorphous polyarylate (B-3) (U POLYMER (registered trademark) POWDER RK, manufactured by UNITIKA Co., Ltd., glass transition temperature (Tg): 193°C) were mixed and granulated using a twin-screw extruder with a barrel temperature of 360°C to obtain a resin composition.

[0184] The resin compositions obtained in Examples 1-4 and Comparative Examples 1-2 were evaluated using the following methods. The results are shown in Tables 1 and 2.

[0185] Manufacturing of Molded Products A film is manufactured using a resin composition via a blow-blowing method. Specifically, the resin composition is fed into the barrel of a single-screw extruder with an inner diameter of 20 mm, and mixed under conditions of a barrel heating temperature of 320°C and a screw speed of 90 rpm. The resin composition is then extruded through a ring die with a die heating temperature of 300°C, a die inner diameter of 20 mm, and a die gap of 1.15 mm to produce a tubular film with a film fold width of approximately 190 mm and a thickness of approximately 30 μm.

[0186] <Evaluation of wrinkles> For the obtained tubular membrane, an arbitrary point was designated as the thickness measurement start point 1. Using a splined micrometer SPM-MX (manufactured by Mitutoyo Co., Ltd.), the thickness of the entire circumference was measured at 5 mm intervals in the TD direction (perpendicular to the flow direction) starting from measurement start point 1. Next, a point 150 mm from measurement start point 1 in the MD direction (flow direction) was designated as measurement start point 2, and the thickness of the entire circumference was measured at 5 mm intervals in the TD direction starting from measurement start point 2. The average thickness of all measurement points was measured, and measurement points with a value more than twice the average thickness were identified as "wrinkles". The total number of measurement points identified as wrinkles was set as the "number of wrinkles", and the ratio of the number of wrinkles to the total number of measurement points was calculated and evaluated as follows.

[0187] AA: The number of wrinkles is less than 3% of all measurement points.

[0188] A: The number of wrinkles is more than 3% but less than 5% of all measurement points.

[0189] B: The number of wrinkles is more than 5% but less than 7% of all measurement points.

[0190] C: The number of wrinkles is more than 7% of all measurement points.

[0191]

Claims

1. A resin composition, wherein, Includes liquid crystal polyester and amorphous polyarylate. The liquid crystal polyester comprises a first monomer unit having a condensed aromatic ring. The content of the first monomer unit is 20 mol% or more relative to the total number of monomer units constituting the liquid crystal polyester. The glass transition temperature (Tg) of the amorphous polyarylate is above 200°C.

2. The resin composition according to claim 1, wherein, The content of the liquid crystal polyester is 80% by mass or more.

3. The resin composition according to claim 1, wherein, The content of the amorphous polyarylate is 0.1 parts by mass and less than 20 parts by mass relative to 100 parts by mass of the liquid crystal polyester.

4. The resin composition according to claim 1, wherein, It further includes carbodiimide compounds having a carbodiimide group.

5. A resin composition comprising a melt blend of raw material components including liquid crystal polyester and amorphous polyarylate. The liquid crystal polyester comprises a first monomer unit having a condensed aromatic ring. The content of the first monomer unit is 20 mol% or more relative to the total number of monomer units constituting the liquid crystal polyester. The glass transition temperature (Tg) of the amorphous polyarylate is above 200°C.

6. The resin composition according to claim 5, wherein, The content of the liquid crystal polyester in the raw material composition is 80% by mass or more.

7. The resin composition according to claim 5, wherein, The content of the amorphous polyarylate in the raw material components is more than 0.1 parts by mass and less than 20 parts by mass relative to 100 parts by mass of the liquid crystal polyester.

8. The resin composition according to claim 5, wherein, The raw material components further contain a carbodiimide compound having a carbodiimide group.

9. The resin composition according to any one of claims 1 to 8, wherein, The difference (Tm-Tg) between the melting point (Tm) of the liquid crystal polyester and the glass transition temperature (Tg) of the amorphous polyaryl ester is below 100°C.

10. The resin composition according to any one of claims 1 to 8, wherein, The condensed aromatic ring is a naphthalene ring.

11. The resin composition according to any one of claims 1 to 8, having a melting point of 300°C or higher.

12. A granule comprising the resin composition according to any one of claims 1 to 8.

13. A molded article comprising the resin composition according to any one of claims 1 to 8.

14. The molded article according to claim 13, wherein it is a film.

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