WO2023157769A1 - Aromatic polysulfone composition, molded article, and molded article manufacturing method - Google Patents

Abstract

The present invention pertains to an aromatic polysulfone composition that contains an aromatic polysulfone, a fluorine resin, and glass fibers. The apparent melt viscosity of the fluorine resin at a shearing velocity of 1000 s^-1 and a temperature of 350°C as measured in compliance with ISO 11443 is 400 Pa·s or less. The contained amount of the glass fibers is 5-100 parts by mass with respect to 100 parts by mass of the aromatic polysulfone.

Description

Aromatic polysulfone composition, molded article, and method for producing molded article

The present invention relates to an aromatic polysulfone composition, a molded article, and a method for producing a molded article.
This application claims priority based on Japanese Patent Application No. 2022-024176 filed in Japan on February 18, 2022, the contents of which are incorporated herein.

Aromatic polysulfone has properties such as excellent heat resistance, mechanical properties, electrical properties, and hot water resistance. Therefore, aromatic polysulfones are used in many fields such as electrical and electronic fields, mechanical fields, automobile fields, aircraft fields, medical food industry fields, and the like.

For example, Patent Document 1 describes a magnetic head support made of a resin composition containing a fluororesin and an aromatic polysulfone resin, and the support is said to have high surface hardness and excellent slidability. be done.

Japanese Patent Application Laid-Open No. 2004-87022

Aromatic polysulfones are favorably used as molding materials for producing molded articles because of their excellent melt fluidity.
However, depending on the shape of the molded article, such as when the molded article has a complicated shape, it may be difficult to remove the molded article from the mold used for molding, in other words, the releasability may be poor, making it difficult to remove the molded article. There is a risk that the molded product will be subjected to stress and that the molded product will be deformed when it is taken out.
Patent Document 1 discloses a resin composition capable of providing a magnetic head support having excellent slidability. There is a need for an aromatic polysulfone composition capable of producing

The present invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an aromatic polysulfone composition capable of producing a molded article having excellent slidability, releasability and heat resistance. do.
Another object of the present invention is to provide a molded article of the aromatic polysulfone composition and a method for producing the molded article.

As a result of intensive studies by the present inventors to solve the above problems, the present inventors have found that it contains aromatic polysulfone, fluororesin, and glass fiber, the fluororesin satisfies a specific melt viscosity value, and glass is The inventors have found that a composition containing fibers can provide a molded article having excellent slidability, releasability and heat resistance, and have completed the present invention.
That is, the present invention has the following aspects.

<1> An aromatic polysulfone composition containing an aromatic polysulfone, a fluororesin, and a glass fiber,
The fluororesin has an apparent melt viscosity of 400 Pa s or less at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ , measured according to ISO 11443;
An aromatic polysulfone composition, wherein the glass fiber content is 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone.
<2> The aromatic polysulfone composition according to <1> above, wherein the content of the fluororesin is 3 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone.
<3> The aromatic polysulfone composition according to <1> or <2> above, wherein the fluororesin has a melting point of 330° C. or lower.
<4> The aromatic polysulfone composition according to any one of <1> to <3>, wherein the fluororesin is polytetrafluoroethylene (PTFE).
<5> The aromatic polysulfone composition according to any one of <1> to <4> above, wherein the aromatic polysulfone is an aromatic polyethersulfone having a repeating unit represented by the following formula (1): thing.
(1) —Ph ¹ —SO ₂ —Ph ² —O—
[In the formula, Ph ¹ and Ph ² each independently represent a phenylene group. Each hydrogen atom in the phenylene group may be independently substituted with an alkyl group, an aryl group or a halogen atom. ]
<6> Any one of <1> to <5> above, wherein the aromatic polysulfone is contained in a proportion of 50% by mass or more and 85% by mass or less with respect to 100% by mass of the total mass of the aromatic polysulfone composition. An aromatic polysulfone composition according to one.
<7> A molded article comprising the aromatic polysulfone composition according to any one of <1> to <6>.
<8> A method for producing a molded article, comprising injection molding the aromatic polysulfone composition according to any one of <1> to <6> above as a molding material.

ADVANTAGE OF THE INVENTION According to this invention, the aromatic polysulfone composition which can manufacture the molding which is excellent in slidability, releasability, and heat resistance can be provided.
Further, according to the present invention, it is possible to provide a molded article containing the aromatic polysulfone composition and having excellent slidability, releasability and heat resistance.
Further, according to the present invention, it is possible to provide a method for producing the molded article using the aromatic polysulfone composition.

FIG. 2 is a schematic diagram showing the shape of a lattice molded product used for evaluation of releasability in Examples.

Embodiments of the aromatic polysulfone composition, the molded article, and the method for producing the molded article of the present invention are described below.
Hereinafter, a molded article produced using the aromatic polysulfone composition of the embodiment and a molded article containing the aromatic polysulfone composition of the embodiment may be referred to as an "aromatic polysulfone composition molded article".

<<Aromatic polysulfone composition>>
An aromatic polysulfone composition of an embodiment is an aromatic polysulfone composition containing an aromatic polysulfone, a fluororesin, and a glass fiber, and the temperature of the fluororesin measured in accordance with ISO 11443 is 350. ° C. and a shear rate of 1000 s ⁻¹ is 400 Pa·s or less, and the content of the glass fiber is 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone.

When the melt viscosity of the fluororesin contained in the aromatic polysulfone composition of the embodiment is 400 Pa s or less, the aromatic polysulfone composition is compared to the case where the fluororesin does not satisfy the melt viscosity value. The releasability of the molded product from the mold is good.

In addition, when the aromatic polysulfone composition of the embodiment contains 5 parts by mass or more of glass fiber with respect to 100 parts by mass of the aromatic polysulfone, the molded product of the aromatic polysulfone composition is evaluated by the deflection temperature under load. Excellent heat resistance.

In the aromatic polysulfone composition of the embodiment, the content of the glass fiber is 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone, and the wear amount of the molded article of the aromatic polysulfone composition is evaluated. Excellent slidability. The content of the glass fiber will be described in detail in the item <Glass fiber> below.

The aromatic polysulfone composition of the embodiment comprises the aromatic polysulfone described above, the fluororesin, the glass fiber, and the other optional components described above, which are used as necessary, in the aromatic polysulfone composition ( % by mass) does not exceed 100% by mass of the total mass of the aromatic polysulfone composition.

The components of the aromatic polysulfone, the fluororesin, and the glass fiber blended in the aromatic polysulfone composition of the embodiment, and the components that may be blended in the aromatic polysulfone composition of the embodiment are described below. .

<Aromatic polysulfone>
Aromatic polysulfone typically comprises a divalent aromatic group (residue obtained by removing two hydrogen atoms bonded to the aromatic ring from an aromatic compound) and a sulfonyl group ( _--SO.sub.2-- ). It is a resin having repeating units containing

The aromatic polysulfone used in this embodiment is preferably a so-called aromatic polyethersulfone having repeating units containing a divalent aromatic group, a sulfonyl group, and an ether bond.

From the viewpoint of heat resistance and chemical resistance, the aromatic polysulfone preferably has a repeating unit represented by the following formula (1) (hereinafter sometimes referred to as "repeating unit (1)"). Repeating units represented by the following formula (2) (hereinafter sometimes referred to as "repeating units (2)") and repeating units represented by the following formula (3) (hereinafter referred to as "repeating units (3)") may have one or more other repeating units such as

(1) —Ph ¹ —SO ₂ —Ph ² —O—
[In the formula, Ph ¹ and Ph ² each independently represent a phenylene group. Each hydrogen atom in the phenylene group may be independently substituted with an alkyl group, an aryl group or a halogen atom. ]

(2) -Ph ³ -R-Ph ⁴ -O-
[In the formula, Ph ³ and Ph ⁴ each independently represent a phenylene group. Each hydrogen atom in the phenylene group may be independently substituted with an alkyl group, an aryl group or a halogen atom. R represents an alkylidene group, an oxygen atom or a sulfur atom. ]

(3)-( ^Ph5 ) _n -O-
[In the formula, Ph ⁵ represents a phenylene group. Each hydrogen atom in the phenylene group may be independently substituted with an alkyl group, an aryl group or a halogen atom. n represents an integer of 1 to 3; When n is 2 or more, multiple Ph ^5s may be the same or different. ]

The phenylene group represented by any one of Ph ¹ to Ph ⁵ may be a p-phenylene group, an m-phenylene group, or an o-phenylene group. - is preferably a phenylene group.

The alkyl group that may substitute the hydrogen atom in the phenylene group preferably has 1 to 10 carbon atoms. Specific examples of the alkyl group include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, n-hexyl group and 2-ethylhexyl group. , n-octyl group, n-decyl group and the like.

The number of carbon atoms in the aryl group, which may substitute hydrogen atoms in the phenylene group, is preferably 6-20. Specific examples of the aryl group include phenyl group, o-tolyl group, m-tolyl group, p-tolyl group, 1-naphthyl group, 2-naphthyl group and the like.

Examples of the halogen atom that may substitute the hydrogen atom in the phenylene group include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

When the hydrogen atoms in the phenylene group are substituted with these groups, the number of such groups is preferably 2 or less, more preferably 1, independently for each phenylene group.
Among the above, it is preferable that the hydrogen atoms in the phenylene group are not substituted.

The alkylidene group represented by R preferably has 1 to 5 carbon atoms. Specific examples include methylene group, ethylidene group, isopropylidene group, 1-butylidene group and the like.

The aromatic polysulfone preferably has 50% or more, more preferably 80% or more, of the repeating unit (1) with respect to the total number (100%) of all repeating units, and substantially repeating units It is even more preferred to have only unit (1). The aromatic polysulfone may have two or more types of repeating units (1) to (3) each independently.

Aromatic polysulfone can be produced by polycondensing a dihalogenosulfone compound corresponding to the repeating unit constituting it and a dihydroxy compound.

For example, the resin having the repeating unit (1) uses a compound represented by the following formula (4) as a dihalogenosulfone compound (hereinafter also referred to as "compound (4)"), and a dihydroxy compound represented by the following formula (5) It can be produced by using a compound represented by

Further, the resin having the repeating unit (1) and the repeating unit (2) is produced by using the compound (4) as the dihalogenosulfone compound and the compound represented by the following formula (6) as the dihydroxy compound. can do.

Further, the resin having the repeating unit (1) and the repeating unit (3) is produced by using the compound (4) as the dihalogenosulfone compound and the compound represented by the following formula (7) as the dihydroxy compound. can do.

(4) X ¹ -Ph ¹ -SO ₂ -Ph ² -X ²
[In the formula, X ¹ and X ² each independently represent a halogen atom. Ph ¹ and Ph ² are as defined above. ]

(5) HO—Ph ¹ —SO ₂ —Ph ² —OH
[wherein, Ph ¹ and Ph ² are as defined above. ]

(6) HO- ^Ph3 -R- ^Ph4 -OH
[wherein, Ph ³ , Ph ⁴ and R are as defined above. ]

(7) HO—(Ph ⁵ ) _n —OH
[In the formula, Ph ⁵ and n are as defined above. ]

The polycondensation of aromatic polysulfone is preferably carried out in a solvent using an alkali metal salt of carbonic acid. The alkali metal salt of carbonic acid may be a carbonate that is a normal salt, a bicarbonate (bicarbonate) that is an acid salt, or a mixture of both. Sodium carbonate and potassium carbonate are preferably used as carbonates, and sodium bicarbonate and potassium bicarbonate are preferably used as hydrogen carbonates.

An organic polar solvent is preferably used as the solvent for polycondensation. Specific examples include dimethylsulfoxide, 1-methyl-2-pyrrolidone, sulfolane (1,1-dioxothylan), 1,3-dimethyl-2-imidazolidinone, 1,3-diethyl-2-imidazolidinone, dimethyl sulfone, diethylsulfone, diisopropylsulfone, diphenylsulfone and the like.

The aromatic polysulfone composition of the embodiment may contain aromatic polysulfone in an amount of 50% by mass or more and 50% by mass or more and 85% by mass or less with respect to the total mass (100% by mass) of the aromatic polysulfone composition. It may be contained, and may be contained in an amount of 60% by mass or more and 80% by mass or less.

<Fluororesin>
As used herein, the term "fluororesin" means a resin containing a fluorine atom in its molecule, and includes polymers having a structural unit containing a fluorine atom.

As the fluororesin contained in the aromatic polysulfone composition of the present embodiment, a commercially available fluororesin satisfying the melt viscosity of 400 Pa·s or less can be appropriately selected and used. Types of fluororesins include, for example, polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), polychlorotrifluoroethylene (PCTFE), ethylene-tetrafluoroethylene copolymer, ethylene -chlorotrifluoroethylene copolymer, polyvinylidene fluoride (PVDF), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (perfluoroalkoxyalkane, PFA), and the like. The fluororesin may be a fluorocarbon resin.

Among the above, the fluororesin is preferably polytetrafluoroethylene (PTFE), from the viewpoint that a molded article having excellent slidability, releasability and heat resistance can be easily obtained.

The melt viscosity of the fluororesin contained in the aromatic polysulfone composition of the embodiment is 400 Pa·s or less. When the melt viscosity of the fluororesin is 400 Pa·s or less, the releasability of the molded product of the aromatic polysulfone composition is excellent.

In this specification, the value of the melt viscosity of the fluororesin is the value obtained by the following measurements.

[Measurement of melt viscosity of fluororesin]
After leaving the fluororesin in the furnace of a capillary rheometer set to a temperature of 350 ° C. (for example, "Capilograph 1D" manufactured by Toyo Seiki Seisakusho Co., Ltd.) for 5 minutes, while maintaining the above temperature, ISO 11443 compliant. and measure the apparent melt viscosity at a shear rate of 1000 s ⁻¹ . A capillary of Φ1.0 mm×10 mm or Φ0.5 mm×10 mm is used for the capillary rheometer.

The apparent melt viscosity of the fluororesin contained in the aromatic polysulfone composition at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ measured according to ISO 11443 is 400 Pa s or less and 200 Pa s. s or less, more preferably 150 Pa s or less, even more preferably 120 Pa s or less, particularly preferably 100 Pa s or less, and particularly preferably 50 Pa s or less. preferable.
When the melt viscosity of the fluororesin is equal to or less than the upper limit, the molded product of the aromatic polysulfone composition has good releasability. In addition, the lower the melt viscosity of the fluororesin, the more the releasability tends to be improved.

The lower limit of the apparent melt viscosity of the fluororesin at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ measured in accordance with ISO 11443 is not particularly limited, but it is believed that it is easily available. from the viewpoint of, it may be 5 Pa·s or more, 10 Pa·s or more, or 20 Pa·s or more.

The upper limit and lower limit of the melt viscosity of the fluororesin exemplified above can be freely combined. An example of the numerical range of the apparent melt viscosity of the fluororesin at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ measured in accordance with ISO 11443 is 5 Pa s or more and 400 Pa s or less. Well, it may be 5 Pa s or more and 200 Pa s or less, it may be 5 Pa s or more and 150 Pa s or less, it may be 10 Pa s or more and 120 Pa s or less, or it may be 10 Pa s or more and 100 Pa s. s or less, or 20 Pa·s or more and 50 Pa·s or less.

Although the details of the mechanism by which the releasability is improved when the melt viscosity of the fluororesin is 400 Pa s or less are unknown, the above melt viscosity of 400 Pa s or less allows the aromatic polysulfone composition It is thought that the dispersibility of the fluororesin in the product is improved, and the effect of improving the releasability inherent in the fluororesin is exhibited satisfactorily.

It has been conventionally known that the action of fluororesin derived from the properties of fluorine generally includes the action of improving releasability and the action of improving slidability as shown in Patent Document 1. It is an event. However, it has not been recognized in the past that it is particularly important for the fluororesin to satisfy a specific melt viscosity for improving the releasability.

As shown in the examples below, it is confirmed that the addition of the fluororesin itself improves both mold releasability and slidability evaluated by the amount of wear. However, the melt viscosity of the fluororesin tends to be reflected more remarkably in the improvement of releasability than in slidability.

The melting point of the fluororesin may be less than 350°C, may be 340°C or less, may be 330°C or less, or may be 325°C or less.

Since the melting point of the fluororesin is equal to or less than the above upper limit, the value of the apparent melt viscosity of the fluororesin measured at 350°C and according to ISO 11443 described above is 400 Pa·s or less. is easy to obtain.

The lower limit of the melting point of the fluororesin may be 280°C or higher, 290°C or higher, or 295°C or higher in consideration of practicality in applications where heat resistance is required.

The upper limit and lower limit of the melting point of the fluororesin can be freely combined. An example of the numerical range of the melting point of the fluororesin may be 280° C. or higher and lower than 350° C., 290° C. or higher and 340° C. or lower, 295° C. or higher and 330° C. or lower, or 295° C. or higher and 325° C. may be:

The melting point of the fluororesin is determined by using a differential scanning calorimeter (for example, "DSC-50" manufactured by Shimadzu Corporation) to raise the temperature at a temperature elevation rate of 10° C./min, confirm the position of the endothermic peak, and confirm the position of the endothermic peak. The temperature at the apex position of the endothermic peak can be measured as the melting point of the fluororesin.

In the aromatic polysulfone composition of the embodiment, the content of the fluororesin with respect to 100 parts by mass of the aromatic polysulfone is preferably 3 parts by mass or more, more preferably 4 parts by mass or more, and 5 parts by mass. It is more preferably 7 parts by mass or more, and particularly preferably 7 parts by mass or more.
An aromatic polysulfone composition containing a fluororesin in a proportion equal to or higher than the above lower limit value effectively exhibits the effect of improving mold releasability and slidability of a molded article.

In the aromatic polysulfone composition of the embodiment, the content of the fluororesin with respect to 100 parts by mass of the aromatic polysulfone is preferably 50 parts by mass or less, more preferably 30 parts by mass or less, and 20 parts by mass. Part or less is more preferable.
An aromatic polysulfone composition containing a fluororesin in a proportion equal to or less than the above upper limit can further improve deflection temperature under load (heat resistance), bending strength, and tensile strength of a molded article.

In the aromatic polysulfone composition of the embodiment, an example of the above numerical range of the content of the fluororesin with respect to 100 parts by mass of the aromatic polysulfone is preferably 3 parts by mass or more and 50 parts by mass or less. It is more preferably from 5 parts by mass to 20 parts by mass, and particularly preferably from 7 parts by mass to 20 parts by mass.

From the same point of view, the content of the fluororesin is preferably 1% by mass or more and 40% by mass or less, more preferably 3% by mass or more and 30% by mass or less, and still more preferably 100% by mass of the aromatic polysulfone composition. is 4% by mass or more and 20% by mass or less, particularly preferably 6% by mass or more and 20% by mass or less.

<Glass fiber>
Examples of glass fibers include, but are not particularly limited to, chopped glass fibers and milled glass fibers.

The chopped glass fiber referred to here is a fiber bundle (glass strand) obtained by directly aligning and bundling a plurality of glass single fibers pulled out from a spinning nozzle, and cutting the fiber bundle length to 1.5 to 25 mm. (glass chopped strand).
Milled glass fiber refers to a strand (milled fiber) that has been pulverized or cut into very short lengths (about less than 1 mm).

Types of the glass fibers include E-glass, A-glass, C-glass, D-glass, AR-glass, R-glass, S-glass, and mixtures thereof. Among them, E-glass is preferable because of its excellent strength and easy availability.

As the glass fiber, a weakly alkaline fiber is excellent in terms of mechanical strength (tensile strength and Izod impact strength) and can be preferably used. In particular, glass fibers having a silicon oxide content of 50% by mass or more and 80% by mass or less relative to the total mass of the glass fibers are preferably used, and glass fibers having a silicon oxide content of 65% by mass or more and 77% by mass or less are more preferably used.

The glass fibers may be fibers treated with a coupling agent such as a silane-based coupling agent or a titanium-based coupling agent, if necessary.

The glass fiber may be coated with a thermoplastic resin such as urethane resin, acrylic resin, ethylene/vinyl acetate copolymer, or a thermosetting resin such as epoxy resin. The fibrils may also be treated with a sizing agent.

The number average fiber length of the raw glass fiber is preferably 30 μm or more, more preferably 50 μm or more, and even more preferably 70 μm or more. When the number average fiber length of the glass fiber is 30 μm or more, the effect as a reinforcing material in the molded article obtained from the aromatic polysulfone composition of the embodiment is further improved than when the number average fiber length is less than 30 μm. do.

In addition, the number average fiber length of the raw glass fiber is preferably 5000 μm or less, more preferably 3500 μm or less. When the number average fiber length of the glass fibers is 5000 μm or less, the adjustment of the number average fiber length of the glass fibers in the aromatic polysulfone composition of the embodiment becomes easier than when the number average fiber length exceeds 5000 μm, Thin wall fluidity is further improved.

An example of the numerical range of the number average fiber length of the glass fiber as the raw material is preferably 30 μm or more and 5000 μm or less, more preferably 50 μm or more and 5000 μm or less, and further preferably 70 μm or more and 3500 μm or less. preferable.

The fiber diameter (single fiber diameter) of the raw glass fiber is preferably 5 μm or more, more preferably 5.5 μm or more, and even more preferably 6 μm or more.
The fiber diameter (single fiber diameter) of the raw glass fiber is preferably 20 μm or less, more preferably 17 μm or less, and even more preferably 15 μm or less.
When the fiber diameter of the glass fiber is 5 μm or more, handling becomes easier than when the fiber diameter is less than 5 μm, and production efficiency can be improved. In addition, when the fiber diameter of the glass fiber is 20 μm or less, the fluidity of the aromatic polysulfone composition is improved, and the effect of the glass fiber as a reinforcing material for the molded body is more enhanced than when the fiber diameter exceeds 20 μm. improve more.
An example of the numerical range of the fiber diameter (single fiber diameter) of the raw glass fiber is preferably 5 μm or more and 20 μm or less, more preferably 5.5 μm or more and 17 μm or less, and 6 μm or more and 15 μm or less. is more preferred.

Note that the glass fiber diameter does not substantially change even after melt-kneading.

In the present specification, "the number average fiber length of the raw material glass fiber" means the value measured by the method described in JIS R3420 "7.8 Chopped strand length" unless otherwise specified. do.

In addition, unless otherwise specified, the "fiber diameter of the raw material glass fiber" means the value measured by "A method" among the methods described in JIS R3420 "7.6 single fiber diameter". .

The lower limit of the glass fiber content per 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition of the embodiment is 5 parts by mass or more from the viewpoint of excellent heat resistance of the molded article. 10 parts by mass or more is preferable, and 20 parts by mass or more is more preferable from the viewpoint of further improving the releasability of the molded article.

In the aromatic polysulfone composition of the embodiment, the upper limit of the content of the glass fiber with respect to 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition is said to provide excellent slidability of the molded article. From the viewpoint of , it is 100 parts by mass or less, preferably 80 parts by mass or less, and more preferably 60 parts by mass or less from the viewpoint of further improving the bending strength and tensile strength of the molded body.

In the aromatic polysulfone composition of the embodiment, the content of the glass fiber is 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition, and 10 parts by mass. It is preferably 80 parts by mass or less, more preferably 20 parts by mass or more and 60 parts by mass or less, and even more preferably 25 parts by mass or more and 50 parts by mass or less.
A molded article of the aromatic polysulfone composition containing glass fibers in the above content has excellent slidability, a high deflection temperature under load, excellent heat resistance, and excellent dimensional stability and releasability.

As another aspect, the content of the glass fiber in the aromatic polysulfone composition of the embodiment is preferably 5 parts by mass or more and 60 parts by mass with respect to 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition. Parts of the aromatic polysulfone composition or less, more preferably 15 parts by mass or more and 50 parts by mass or less, is further excellent in flexural strength and tensile strength.

As another aspect, the content of the glass fiber in the aromatic polysulfone composition of the embodiment is 20 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition. The molded article of the aromatic polysulfone composition is even more excellent in releasability.

In this way, the content of glass fibers is also involved in releasability and slidability. That is, satisfying both the melt viscosity of the fluororesin and the content of the glass fiber in the aromatic polysulfone composition of the above-exemplified embodiment improves the releasability and slidability of the molded product. contribute to Therefore, the molded article of the aromatic polysulfone composition of the embodiment that satisfies both of these requirements is particularly excellent in releasability and slidability.

<Optional component>
Optional components include fillers other than glass fiber, resins other than aromatic polysulfone, and additives known in the art such as colorants.

Fillers other than glass fibers may be inorganic fillers or organic fillers. Inorganic fillers include fibrous fillers.

Examples of fibrous fillers other than glass fibers include carbon fibers such as bread-based carbon fibers and pitch-based carbon fibers; ceramic fibers such as silica fibers, alumina fibers and silica-alumina fibers; and metal fibers such as stainless steel fibers. be done. Examples of fibrous fillers also include whiskers such as potassium titanate whiskers, barium titanate whiskers, wollastonite whiskers, aluminum borate whiskers, silicon nitride whiskers, and silicon carbide whiskers.

　As resins other than aromatic polysulfone, known thermoplastic resins can be mentioned. The thermoplastic resin includes polyolefin resins such as polyethylene, polypropylene, polybutadiene, and polymethylpentene; vinyl resins such as vinyl chloride, vinylidene chloride, vinyl acetate, and polyvinyl alcohol; polystyrene, acrylonitrile-styrene resin (AS resin), acrylonitrile- Polystyrene resins such as butadiene-styrene resin (ABS resin); polyamide 6 (nylon 6), polyamide 66 (nylon 66), polyamide 11 (nylon 11), polyamide 12 (nylon 12), polyamide 46 (nylon 46), polyamide 610 (nylon 610), polytetramethylene terephthalamide (nylon 4T), polyhexamethylene terephthalamide (nylon 6T), polymetaxylylene adipamide (nylon MXD6), polynonamethylene terephthalamide (nylon 9T), polydecamethylene Polyamide resins such as terephthalamide (nylon 10T); polyester resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polytrimethylene terephthalate; linear polyphenylene sulfide, crosslinked polyphenylene sulfide, semi-crosslinked polyphenylene sulfide, etc. polyphenylene sulfide; polyetherketone such as polyetherketone; polycarbonate; polyphenylene ether; polyimide resin such as thermoplastic polyimide and polyamideimide.

Additives include, for example, weighing stabilizers, release agents, antioxidants, heat stabilizers, UV absorbers, antistatic agents, surfactants, flame retardants, and colorants.

Note that the aromatic polysulfone composition of the embodiment preferably does not contain a release agent (not applicable to fluororesins).

As an example of the aromatic polysulfone composition of the embodiment, with respect to the total mass (100% by mass) of the aromatic polysulfone composition,
Preferably, a composition containing 50% to 85% by mass of aromatic polysulfone, 1% to 40% by mass of fluororesin, and 5% to 45% by mass of glass fiber can be exemplified. ,
More preferably, a composition containing 50 to 85% by mass of aromatic polysulfone, 3 to 30% by mass of fluororesin, and 7 to 40% by mass of glass fiber is exemplified. can
More preferably, a composition containing 60% to 80% by mass of aromatic polysulfone, 4% to 20% by mass of fluororesin, and 10% to 35% by mass of glass fiber is exemplified. can.
However, in the aromatic polysulfone composition of the embodiment, the content of the glass fiber is in the range of 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone.

<About each evaluation item>
According to the aromatic polysulfone composition of the embodiment, it is possible to produce a molded article excellent in slidability, releasability and heat resistance.
Releasability and heat resistance of molded articles of the aromatic polysulfone composition can be evaluated as follows.

In the aromatic polysulfone composition of the embodiment, the melt viscosity of the fluororesin contained is 400 Pa s or less, so that the molded product of the aromatic polysulfone composition has good releasability from the mold. .
The releasability can be evaluated using the following measurement value of releasability as an index. It can be determined that the smaller the release resistance value, the better the release property.

[Release resistance]
Using an aromatic polysulfone composition as a molding material, an injection molding machine (for example, "ROBOSHOT S-2000i" manufactured by FANUC Co., Ltd.) is used at a molding temperature of 360 ° C., a mold temperature of 130 ° C., an injection speed of 100 mm / s, and a holding pressure. Under the condition of 70 MPa, for example, the grid molded product shown in FIG. can be measured as a value.

In the aromatic polysulfone composition of the embodiment, the measured value of the mold release resistance measured for the grid molded product shown in FIG. 0.4 kN or more and 0.8 kN or less.

Since the aromatic polysulfone composition of the embodiment contains glass fibers, the molded product of the aromatic polysulfone composition has excellent heat resistance.
The heat resistance can be evaluated using the measured deflection temperature under load as an index. It can be judged that the higher the deflection temperature under load, the better the heat resistance.

[Deflection temperature under load]
Using an aromatic polysulfone composition as a molding material, an injection molding machine (for example, "NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) is used at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding is performed under the conditions to prepare a test piece of 127 mm x 12.7 mm x 6.4 mmt. The deflection temperature under load of the obtained test piece is measured twice at a heating rate of 4° C./min under a load of 1.82 MPa according to ASTM D648, and the average value of the measured values obtained is adopted.

In the aromatic polysulfone composition of the embodiment, the measured value of the deflection temperature under load measured on the test piece may be, for example, 210° C. or higher and 210° C. or higher and 240° C. or lower. °C or higher and 230 °C or lower.

The aromatic polysulfone composition of the embodiment contains a fluororesin having a melt viscosity of 400 Pa·s or less, and glass fibers in a predetermined proportion, thereby improving the slidability of the molded product of the aromatic polysulfone composition. Excellent.
The slidability can be evaluated using the measured value of the wear amount described below as an index. It can be judged that the smaller the value of the wear amount, the better the slidability.

[Wear amount]
Using an aromatic polysulfone composition as a molding material, using an injection molding machine (for example, "NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.), molding temperature 360 ° C., mold temperature 150 ° C., injection speed 50 mm / s. to prepare a test piece of 64 mm x 64 mm x 3 mmt.
Next, the test piece is subjected to a Suzuki-type friction wear tester (for example, "TRI-S100D" manufactured by Takachiho Seiki Co., Ltd.), using an aluminum material as the mating material, at a pressure of 1.5 MPa, a speed of 10 m / min, A friction wear test is performed for 30 minutes under conditions of a measurement temperature of 23° C. and a relative humidity of 50%, and the depth of wear (unit: μm) of the test piece is measured.

In the aromatic polysulfone composition of the embodiment, the wear amount measured on the test piece may be, for example, 1000 µm or less, 800 µm or less, or 700 µm or less.

In addition to the release property, heat resistance, and slidability shown in the evaluation indices above, the molded article of the aromatic polysulfone composition of the embodiment also has Excellent properties can be exhibited.
Each item of tensile strength, bending strength, and dimensional stability of the aromatic polysulfone composition molded article can be evaluated as follows.

Since the aromatic polysulfone composition of the embodiment contains glass fibers in a predetermined content ratio, the molded article of the aromatic polysulfone composition has excellent tensile strength.
The tensile strength can be evaluated using the measured value of tensile strength described below as an index. It can be judged that the higher the tensile strength value, the better the tensile strength.

[Tensile strength]
Using an aromatic polysulfone composition as a molding material, an injection molding machine (for example, "NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) is used at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding is performed under the conditions to prepare an ASTM No. 4 test piece with a thickness of 2.5 mm. The tensile strength (maximum point strength) of the obtained test piece was measured five times at a test speed of 10 mm/min in an atmosphere of 23°C and 50% relative humidity in accordance with ASTM D638. Adopt the average value of

In the aromatic polysulfone composition of the embodiment, the measured value of the tensile strength measured on the test piece may be, for example, 58 MPa or more, 100 MPa or more and 160 MPa or less, or 120 MPa or more and 150 MPa or less. It's okay.

Since the aromatic polysulfone composition of the embodiment contains glass fibers in a predetermined content ratio, the molded article of the aromatic polysulfone composition has excellent flexural strength.
The bending strength can be evaluated using the measured value of bending strength described below as an index. It can be determined that the higher the bending strength value, the better the bending strength.

[Bending strength]
Using an aromatic polysulfone composition as a molding material, an injection molding machine (for example, "NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) is used at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding is performed under the conditions to prepare a test piece of 127 mm x 12.7 mm x 6.4 mmt. The bending strength of the obtained test piece was measured three times in accordance with ASTM D790 at a test speed of 2 mm / min, a distance between fulcrums of 10 mm, 23 ° C., and a relative humidity of 50%. Adopt values.

In the aromatic polysulfone composition of the embodiment, the bending strength measured on the test piece may be, for example, 70 MPa or more, 130 MPa or more and 220 MPa or less, or 150 MPa or more and 200 MPa or less. It's okay.

Since the aromatic polysulfone composition of the embodiment contains glass fibers, the molded product of the aromatic polysulfone composition has excellent dimensional stability.
The dimensional stability can be evaluated using the measured value of the shrinkage ratio below as an index. It can be judged that the smaller the value of shrinkage, the better the dimensional stability.

[Shrinkage factor]
Using an aromatic polysulfone composition as a molding material, using an injection molding machine (for example, "NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.), molding temperature 360 ° C., mold temperature 150 ° C., injection speed 50 mm / s. Injection molding is performed at , and a test piece of 64 mm x 64 mm x 3 mmt is produced as the dimensions of the mold cavity.
For the prepared test piece, using a micrometer, the length of two sides of the flow direction (MD) of the aromatic polysulfone composition was measured, and the average value was obtained. From the length, the shrinkage rate of MD is calculated by the following formula.
In addition, for the prepared test piece, the length of two sides in the direction (TD) perpendicular to the flow direction of the aromatic polysulfone composition was measured, the average value was obtained, and this average value and the TD of the mold cavity From the length, the shrinkage rate of TD is calculated by the following formula.

MD shrinkage rate (%) = ([mold cavity MD length (μm)] - [average length of two sides of molded body MD (μm)]) / [mold cavity MD Length (μm)] × 100
Shrinkage rate of TD (%) = ([Length of TD of mold cavity (μm)] - [Average length of two sides of TD of molded body (μm)]) / [TD of mold cavity Length (μm)] × 100

In the aromatic polysulfone composition of the embodiment, the MD shrinkage rate (%) measured on the test piece may be, for example, 0.5% or less, or 0.4% or less. may be present, and may be 0.3% or less.

In the aromatic polysulfone composition of the embodiment, the TD shrinkage rate (%) measured on the test piece may be, for example, 0.5% or less, or 0.4% or less. may be present, and may be 0.3% or less.

[Method for producing aromatic polysulfone composition]
The aromatic polysulfone composition of the embodiment can be obtained by mixing the above-described aromatic polysulfone, fluororesin, glass fiber, and optionally optional components all at once or in an appropriate order.

According to the method for producing the aromatic polysulfone composition of the embodiment, the aromatic polysulfone composition of the embodiment can be produced.

Regarding the aromatic polysulfone, fluororesin, glass fiber, optional components, and their blending ratio, the same ones as those explained in the above <<aromatic polysulfone composition>> can be exemplified.

The primary particle size of the fluororesin that can be used as a raw material may be, for example, 0.1 to 20 μm.

As a method for producing the aromatic polysulfone composition of the embodiment,
A step of mixing an aromatic polysulfone, a fluororesin, and a glass fiber,
The fluororesin has an apparent melt viscosity of 400 Pa s or less at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ , measured according to ISO 11443;
A method for producing an aromatic polysulfone composition is exemplified, wherein the blending amount of the glass fiber is 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone.

In the method for producing an aromatic polysulfone composition of the embodiment, the aromatic polysulfone is blended at a ratio of 50% by mass or more and 85% by mass or less with respect to the total mass (100% by mass) of the aromatic polysulfone composition. is preferred.

Melt-kneading is preferable as the mixing. The aromatic polysulfone composition of the present embodiment can be provided as a pelletized product by melt-kneading the aromatic polysulfone, fluororesin, glass fiber, and optional components using an extruder. is.

The aromatic polysulfone composition obtained in this way, particularly the pellets of the aromatic polysulfone composition, can be suitably used as a molding material for the molded article described below.

≪Molded body≫
The molded article of the present embodiment is a molded article produced using the aromatic polysulfone composition of the embodiment described above.
The molded article of this embodiment is a molded article containing the aromatic polysulfone composition of the embodiment described above.
A molded article made of the aromatic polysulfone composition of the embodiment can be exemplified as the molded article of the present embodiment.

The molded body of the present embodiment is a molded body containing aromatic polysulfone, fluororesin, and glass fiber,
The fluororesin has an apparent melt viscosity of 400 Pa s or less at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ , measured according to ISO 11443;
A molded article having a content of 5 parts by mass or more and 100 parts by mass or less of the glass fiber with respect to 100 parts by mass of the aromatic polysulfone can be exemplified.

The molded article of this embodiment can be obtained by a known molding method using an aromatic polysulfone composition. As a method for molding the aromatic polysulfone composition of the present embodiment, a melt molding method is preferable, and examples thereof include an injection molding method, an extrusion molding method such as a T-die method and an inflation method, a compression molding method, a blow molding method, Vacuum forming methods and press molding are included. Among them, the injection molding method is preferable.

The aromatic polysulfone composition of the embodiment has excellent releasability and heat resistance, and has useful properties during injection molding. Therefore, the aromatic polysulfone composition of the embodiment is suitable as a molding material used for injection molding.

As a method for producing the molded article of this embodiment, a method for producing a molded article including injection molding the aromatic polysulfone composition of the above-described embodiment as a molding material can be exemplified.

For example, when the resin composition described above is used as a molding material and molded by an injection molding method, the resin composition is melted using a known injection molding machine, and the melted resin composition is injected into a mold. Molded by
Here, when the resin composition is charged into the injection molding machine, each component may be charged separately into the injection molding machine, or some or all of the components may be mixed in advance and charged into the injection molding machine as a mixture. You may
Known injection molding machines include, for example, an electric injection molding machine NEX50IV-5EG manufactured by Nissei Plastic Industry Co., Ltd., and the like.

The temperature conditions for injection molding are appropriately determined according to the type of aromatic polysulfone composition, and the cylinder temperature of the injection molding machine can be appropriately set according to the melt viscosity of the aromatic polysulfone composition used.

The temperature of the mold is preferably set in the range of room temperature (25° C.) to 180° C. from the viewpoint of the cooling rate and productivity of the aromatic polysulfone composition.
Other injection conditions, such as screw rotation speed, back pressure, injection speed, holding pressure, and holding pressure time, may be appropriately adjusted.

The molded article of the present embodiment can be applied to all uses to which resin compositions can generally be applied.
The molded article of the present embodiment is, for example, a connector, a socket, an IC socket, a burn-in socket, a relay part, a coil bobbin, an optical pickup, an oscillator, a printed wiring board, a circuit board, a semiconductor package, an electric/electronic part such as a computer-related part. Parts related to the semiconductor manufacturing process, such as IC trays and wafer carriers; Parts for household electrical appliances, such as VTRs, televisions, irons, air conditioners, stereos, vacuum cleaners, refrigerators, rice cookers, and lighting fixtures; Lighting fixtures, such as lamp reflectors and lamp holders Parts: Audio product parts such as compact discs, laser discs (registered trademark), speakers, etc.; Ferrules for optical cables, telephone parts, facsimile parts, communication equipment parts such as modems; Copiers and printers such as separation claws, heater holders, etc. Related parts; Mechanical parts such as impellers, fan gears, gears, bearings, motor parts and cases; Automobile parts such as mechanical parts for automobiles, engine parts, engine room internal parts, electrical parts, interior parts, microwave cooking pots , heat-resistant tableware, etc.; insulation and soundproofing materials such as flooring and wall materials; supporting materials such as beams and columns; construction materials such as roofing materials; Equipment parts; radiation facility parts such as nuclear reactors, offshore facility parts, cleaning jigs, optical equipment parts, valves, pipes, nozzles, filters, membranes, medical equipment parts and medical materials, sensors parts, sanitary equipment, sporting goods, leisure goods, cable ties, etc.

Since the aromatic polysulfone composition of the embodiment is used, the molded article of the present embodiment described above is excellent in slidability, releasability and heat resistance.

In addition, since the aromatic polysulfone composition of the embodiment is used, the molded article of the present embodiment has excellent dimensional stability as compared with a composition containing no glass fiber.

In particular, the molded article of the aromatic polysulfone composition of the embodiment, which contains 20 parts by mass or more and 60 parts by mass or less of glass fiber with respect to 100 parts by mass of the aromatic polysulfone contained in the aromatic polysulfone composition, further It is also excellent in bending strength and tensile strength.

Since the molded article of the above embodiment has excellent releasability and heat resistance, and furthermore has excellent bending strength and tensile strength, the molded article may be deformed when it is taken out after injection molding. is further reduced. Furthermore, since it is excellent in slidability, the molded article of the embodiment can be suitably used as a part that requires sliding, especially as an electric/electronic part.

According to the present embodiment, it is possible to achieve well-balanced evaluation results in terms of slidability, releasability, heat resistance, tensile strength, bending strength, and dimensional stability. It is possible to provide a very useful aromatic polysulfone composition and a molded product thereof.

The present invention will now be described in more detail with reference to examples, but the present invention is not limited to the following examples.

<Measurement>

[Melting point of fluororesin]
Using a differential scanning calorimeter ("DSC-50" manufactured by Shimadzu Corporation), the temperature was raised at a temperature elevation rate of 10°C/min, the position of the endothermic peak was confirmed, and the temperature at the apex position of the endothermic peak was measured. It was measured as the melting point of the fluororesin.

[Measurement of melt viscosity of fluororesin]
After leaving the fluororesin in the furnace of a capillary rheometer (manufactured by Toyo Seiki Seisakusho Co., Ltd., "Capilograph 1D") set to a temperature of 350 ° C. for 5 minutes, while maintaining the above temperature, ISO 11443 conforming to, Apparent melt viscosities were measured at a shear rate of 1000 s ⁻¹ . A capillary of Φ1.0 mm×10 mm or Φ0.5 mm×10 mm was used (Φ0.5 mm×10 mm was used only for measuring the melt viscosity of PTFE XPP552R).

[Release resistance]
Using pellets of an aromatic polysulfone composition as a molding material, an injection molding machine (“ROBOSHOT S-2000i” manufactured by FANUC Co., Ltd.) was used at a molding temperature of 360 ° C., a mold temperature of 130 ° C., an injection speed of 100 mm / s, and a holding pressure. Under the conditions of 70 MPa, the grid molded product shown in FIG. measured as It can be determined that the smaller the value of the release resistance, the better the releasability.

The lattice molded product shown in FIG. 1 has a width of 18 mm, a depth of 26 mm, and a height of 9.5 mm, and is formed by partitions each having a width of about 1 mm to form a lattice of 8×6 squares of the same shape. .
Such a complex-shaped molded article (lattice molded article) is difficult to release from the mold and tends to be inferior in releasability, and therefore is suitable as an object for evaluation of releasability.

[Deflection temperature under load]
Using pellets of an aromatic polysulfone composition as a molding material, an injection molding machine ("NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) was used to mold at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding was performed under the conditions to prepare a test piece of 127 mm x 12.7 mm x 6.4 mmt. The deflection temperature under load of the obtained test piece was measured twice at a heating rate of 4° C./min under a load of 1.82 MPa according to ASTM D648, and the average value of the obtained measured values was adopted. It can be said that the higher the deflection temperature under load, the higher the heat resistance of the molded article.

[Wear amount]
Using pellets of the aromatic polysulfone composition as a molding material, using an injection molding machine ("NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.), the molding temperature is 360 ° C., the mold temperature is 150 ° C., and the injection speed is 50 mm / s. to prepare a test piece of 64 mm x 64 mm x 3 mmt.
Next, the test piece is subjected to a Suzuki friction and wear tester ("TRI-S100D" manufactured by Takachiho Seiki Co., Ltd.) using an aluminum material as the mating material, a pressure of 1.5 MPa, a speed of 10 m / min, and a measurement temperature. A friction wear test was performed for 30 minutes under conditions of 23° C. and 50% relative humidity, and the depth of wear (unit: μm) of the test piece was measured.

[Tensile strength]
Using pellets of an aromatic polysulfone composition as a molding material, an injection molding machine ("NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) was used to mold at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding was performed under the conditions to prepare an ASTM No. 4 test piece with a thickness of 2.5 mm. The tensile strength (maximum point strength) of the obtained test piece was measured five times at a test speed of 10 mm/min in an atmosphere of 23°C and 50% relative humidity in accordance with ASTM D638. The average value of was adopted.

[Bending strength]
Using pellets of an aromatic polysulfone composition as a molding material, an injection molding machine ("NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.) was used to mold at a molding temperature of 360 ° C., a mold temperature of 150 ° C., and an injection speed of 50 mm / s. Injection molding was performed under the conditions to prepare a test piece of 127 mm x 12.7 mm x 6.4 mmt. The bending strength of the obtained test piece was measured three times in an atmosphere of 23° C. and 50% relative humidity at a test speed of 2 mm/min and a distance between fulcrums of 10 mm in accordance with ASTM D790. The average value of was adopted.

[Shrinkage factor]
Using pellets of the aromatic polysulfone composition as a molding material, using an injection molding machine ("NEX50IV-5EG" manufactured by Nissei Plastic Industry Co., Ltd.), the molding temperature is 360 ° C., the mold temperature is 150 ° C., and the injection speed is 50 mm / s. to prepare a test piece having a mold cavity dimension of 64 mm×64 mm×3 mmt.
Using a micrometer, measure the length of the two sides in the direction of flow (MD) of the aromatic polysulfone composition for the prepared shaped test piece, determine the average value, and compare this average value with the MD of the mold cavity. The MD shrinkage was calculated by the following formula from the length of .
In addition, for the prepared test piece, the length of two sides in the direction (TD) perpendicular to the flow direction of the aromatic polysulfone composition was measured, the average value was obtained, and this average value and the TD of the mold cavity From the length, the shrinkage rate of TD was calculated by the following formula.

MD shrinkage rate (%) = ([mold cavity MD length (μm)] - [average length of two sides of molded body MD (μm)]) / [mold cavity MD Length (μm)] × 100
Shrinkage rate of TD (%) = ([Length of TD of mold cavity (μm)] - [Average length of two sides of TD of molded body (μm)]) / [TD of mold cavity Length (μm)] × 100

<Production of composition>
[Examples 1 to 13, Comparative Examples 1 to 10]
After mixing each of the following components with the composition (parts by mass) shown in Tables 1 to 3 using a tumbler mixer, using a twin-screw extruder (manufactured by Ikegai Tekko Co., Ltd. PCM-30 type), a cylinder temperature of 340 ° C., a screw The mixture was melt-kneaded at a rotation speed of 150 rpm, extruded in a strand shape, and pelletized to obtain pellets of the aromatic polysulfone composition.

Aromatic polysulfone:
・ Sumika Excel (registered trademark) PES 3600P (polyethersulfone (PES), manufactured by Sumitomo Chemical Co., Ltd.)

Glass fiber:
・ CS3J260S (number average fiber length 3 mm, average fiber diameter 11 μm, manufactured by Nitto Boseki Co., Ltd.)
・ CS3DE260S (number average fiber length 3 mm, average fiber diameter 6 μm, manufactured by Nitto Boseki Co., Ltd.)

　Talc: X50 (manufactured by Nippon Talc Co., Ltd.)

Fluororesin (PTFE):
・ XPP552R (primary particle size 3 μm, manufactured by Solvay Specialty Polymers Japan Co., Ltd.)
・ TF 9205 (primary particle size 8 μm, manufactured by 3M Japan Co., Ltd.)
・ L169J (primary particle size 18 μm, manufactured by AGC Co., Ltd.)
・ L203R (primary particle size 0.2 μm, manufactured by Solvay Specialty Polymers Japan Co., Ltd.)
・ TF 9202Z (primary particle size 0.2 μm, manufactured by 3M Japan Co., Ltd.)
・ L173JE (primary particle size 0.3 μm, manufactured by AGC Co., Ltd.)
・ TF 9201Z (primary particle size 0.2 μm, manufactured by 3M Japan Co., Ltd.)
・ TF 9207Z (primary particle size 0.1 μm, manufactured by 3M Japan Co., Ltd.)
・ F284R (primary particle size 9 μm, manufactured by Solvay Specialty Polymers Japan Co., Ltd.)

The above measurement results are shown in Tables 1-3.

In Comparative Example 7 containing no PTFE, the release resistance was large and the releasability was poor.
On the other hand, in Examples 1 to 11 containing PTFE (fluororesin) that satisfies the requirement that the melt viscosity is 400 Pa·s or less, the release resistance was small and the release property was good (Table 1).
However, in Comparative Examples 1 to 6 containing PTFE that does not satisfy the requirement that the melt viscosity is 400 Pa s or less, the release resistance value is greater than that of the above examples, resulting in inferior release properties (Table 2).

For each melt viscosity of the contained fluororesin, Examples 1 to 5 with a melt viscosity of 28 Pa s, Examples 6 to 9 with a melt viscosity of 111 Pa s, and Example 10 with a melt viscosity of 381 Pa s , there was a tendency that the lower the melt viscosity of the fluororesin, the smaller the release resistance value and the better the release property (Table 1).

From these facts, it is clear that there is a correlation between releasability and the melt viscosity of the fluororesin.

In Comparative Example 7, which did not contain PTFE, the value of the amount of wear was very large and the slidability was poor (because the amount of wear exceeded the thickness of the test piece, it exceeded the detection limit).

However, with respect to the amount of wear, there was a large variation in the evaluation results between the examples and the comparative examples. In other words, the regulation of the melt viscosity of the fluororesin has a greater effect on the improvement of the releasability than on the slidability.
Therefore, it was shown that it is particularly important for the fluororesin to satisfy the above-mentioned specific melt viscosity in improving releasability.

In Comparative Example 8, which does not contain glass fiber, the deflection temperature under load tended to be low, that is, the heat resistance tended to be poor. Moreover, the value of shrinkage|contraction ratio MD was high, and the result was inferior also to dimensional stability.

On the other hand, in Examples 1 to 11 containing 5 parts by mass or more of glass fiber with respect to 100 parts by mass of polyethersulfone, the deflection temperature under load was improved, the heat resistance was improved, and the shrinkage rate MD value was It was small and had improved dimensional stability.
In Comparative Example 9, which contained talc instead of glass fiber, the effect of improving the deflection temperature under load was inferior to that of glass fiber.

With reference to Table 3, further focusing on the glass fiber content, in Comparative Example 10 in which the glass fiber content exceeded 100 parts by mass with respect to 100 parts by mass of polyethersulfone, the amount of abrasion was significantly increased and the slidability was reduced. was inferior, and the tensile strength and bending strength were also lowered.

Therefore, the injection-molded article of the polyethersulfone composition in which the content of the glass fiber is in the range of 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polyethersulfone has excellent slidability. It was also shown to be excellent in heat resistance, releasability, tensile strength and bending strength.

Further, from the results shown in Table 3, the injection molded articles of the polyethersulfone composition having a glass fiber content of 5 parts by mass or more and 60 parts by mass or less with respect to 100 parts by mass of polyethersulfone (Example 12, 2 and 5), the flexural strength and tensile strength were further improved as compared with the injection molded article (Example 13, Comparative Example 10) of the composition outside the range.

Further, from the results shown in Table 3, injection molded articles of polyethersulfone compositions having a glass fiber content of 20 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of polyethersulfone (Example 2, 5 and 13) had even better releasability than the injection-molded article (Example 12) of the composition outside the range.

From the above results, it is clear that the aromatic polysulfone, fluororesin, and glass fiber are contained, the melt viscosity of the fluororesin is 400 Pa s or less, and the glass fiber content is 5 mass with respect to 100 parts by mass of the aromatic polysulfone. The injection molded articles of the aromatic polysulfone compositions of Examples 1 to 13 to which the present invention is applied, which are in the range of 1 part or more and 100 parts by mass or less, have releasability, heat resistance, tensile strength, bending strength, and slidability. , and dimensional stability.

Each configuration and combination thereof in each embodiment is an example, and modifications such as addition, omission, and replacement of configurations are possible without departing from the scope of the present invention. Moreover, the present invention is not limited to each embodiment, but is limited only to the scope of the claims.

Claims (8)

An aromatic polysulfone composition comprising an aromatic polysulfone, a fluororesin, and a glass fiber,
The fluororesin has an apparent melt viscosity of 400 Pa s or less at a temperature of 350° C. and a shear rate of 1000 s ⁻¹ , measured according to ISO 11443;
An aromatic polysulfone composition, wherein the glass fiber content is 5 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the aromatic polysulfone. The aromatic polysulfone composition according to claim 1, wherein the content of said fluororesin is 3 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of said aromatic polysulfone. The aromatic polysulfone composition according to claim 1 or 2, wherein the fluororesin has a melting point of 330°C or lower. The aromatic polysulfone composition according to claim 1 or 2, wherein the fluororesin is polytetrafluoroethylene (PTFE). 3. The aromatic polysulfone composition according to claim 1, wherein said aromatic polysulfone is an aromatic polyethersulfone having a repeating unit represented by the following formula (1).
(1) —Ph ¹ —SO ₂ —Ph ² —O—
[In the formula, Ph ¹ and Ph ² each independently represent a phenylene group. Each hydrogen atom in the phenylene group may be independently substituted with an alkyl group, an aryl group or a halogen atom. ] The aromatic polysulfone composition according to claim 1 or 2, containing the aromatic polysulfone at a ratio of 50% by mass or more and 85% by mass or less with respect to 100% by mass of the total mass of the aromatic polysulfone composition. A molded article containing the aromatic polysulfone composition according to claim 1 or 2. A method for producing a molded body, comprising injection molding the aromatic polysulfone composition according to claim 1 or 2 as a molding material.

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