[go: up one dir, main page]

WO2025169700A1 - Composition de résine glissante et élément en résine glissant - Google Patents

Composition de résine glissante et élément en résine glissant

Info

Publication number
WO2025169700A1
WO2025169700A1 PCT/JP2025/001546 JP2025001546W WO2025169700A1 WO 2025169700 A1 WO2025169700 A1 WO 2025169700A1 JP 2025001546 W JP2025001546 W JP 2025001546W WO 2025169700 A1 WO2025169700 A1 WO 2025169700A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
sliding
resin
domains
resin composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/001546
Other languages
English (en)
Japanese (ja)
Inventor
麻弥香 末光
耕平 ▲高▼橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oiles Corp
Oiles Industry Co Ltd
Original Assignee
Oiles Corp
Oiles Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oiles Corp, Oiles Industry Co Ltd filed Critical Oiles Corp
Publication of WO2025169700A1 publication Critical patent/WO2025169700A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Ethene-propene or ethene-propene-diene copolymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/10—Copolymers of styrene with conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics

Definitions

  • a sliding resin composition has been proposed that, when used as a sliding part, provides a sliding part that is excellent in slidability and wear resistance regardless of whether the mating sliding part is made of plastic or metal, and a sliding part made using the same (see, for example, Patent Document 1). More specifically, the sliding resin composition contains, relative to 100 parts by weight of polyacetal resin, 0.5 to 15 parts by weight of an olefin-based elastomer, 0.1 to 5 parts by weight of a fatty acid ester having 12 or more carbon atoms, and 0.05 to 5 parts by weight of polytetrafluoroethylene fine powder, and a polyacetal sliding resin member derived therefrom.
  • a polyamide resin composition has been proposed that is suitable for use in molding sliding parts that are required to have excellent moldability and heat resistance, as well as excellent sliding properties, particularly excellent wear resistance mediated by particles (hereinafter also referred to as dust) having high hardness, and excellent sliding stability (see, for example, Patent Document 2).
  • the applicant of the present invention has also proposed a sliding resin composition that, when molded into a sliding member, reduces the generation of creaking noise while maintaining good moldability and improves sliding properties including load resistance, low friction, and wear resistance, and a sliding member derived therefrom (see, for example, Patent Document 3).
  • the polyacetal resin composition described in Patent Document 1 and the sliding parts derived therefrom are limited to polyacetal resin as the main resin material, and require the olefin-based elastomer to be dispersed in the form of fine particles, which results in poor versatility and, moreover, problems such as insufficient suppression of squeak noise under more severe sliding conditions have been observed.
  • synthetic resins are selected as the sliding mating materials, and when sliding friction occurs between synthetic resins, stick-slip is likely to occur, and it has not always been possible to sufficiently prevent the generation of creaking noises due to stick-slip.
  • there are many types of essential components that constitute the polyacetal resin composition and the molding conditions for obtaining a uniformly mixed molded product are complicated, which has led to manufacturing problems such as the need to control the temperature of each part of the molding machine during molding.
  • the sliding part described in Patent Document 2 must be limited to a crystalline polyamide resin (A) as the main resin, and the modified polyolefin resin (B) having a predetermined functional group and the thermoplastic elastomer (C) having a predetermined functional group must be dispersed in the matrix of the crystalline polyamide resin (A) to a size of 5 ⁇ m or less, which also results in a problem of poor versatility.
  • the present invention aims to provide a sliding resin composition that uses (A) a polyacetal resin or any other resin as the main resin, and (B) an olefin-based resin or the like dispersed and blended to create a domain structure with a predetermined non-uniformity, thereby minimizing the generation of squeaks and other noises and exhibiting excellent sliding properties, as well as a sliding member derived therefrom.
  • a sliding resin composition comprising at least the following components (A) and (B), characterized in that domains having an equivalent circle diameter of 10 ⁇ m or more derived from component (B) that are non-uniformly dispersed in component (A) per unit area of any cross section are selected, and the average value of the equivalent circle diameters of the selected domains ( ⁇ 1, hereinafter sometimes referred to as the average value of domains of 10 ⁇ m or more derived from component (B) or simply the average value of the predetermined domains) is set to a value within a range of 10 to 30 ⁇ m, thereby solving the above-mentioned problems.
  • the state in which domains are non-uniformly dispersed means a state in which the particle size distribution of the domains measured using an image analysis method or the like is not concentrated in a narrow range.
  • the standard deviation ( ⁇ ) of the equivalent circle diameters of all domains per unit area measured by the image analysis method is as wide as 0.8 ⁇ m or more.
  • the average value ( ⁇ 1) of a given domain is one of the indicators of whether the domain structure is in a non-uniform state, and can usually be measured and calculated with high accuracy under given conditions using an image analysis method.
  • the sliding resin composition of the present invention it is preferable to select at least five domains, n1 to n5, from the domains derived from component (B) per unit area in descending order of circle-equivalent diameter, and set the average circle-equivalent diameter of the selected domains ( ⁇ 2; hereinafter, this may be referred to as the average value of at least five domains derived from component (B) in descending order of circle-equivalent diameter, or simply as the maximum particle size of a predetermined domain) to a value within the range of 10 to 130 ⁇ m.
  • the sliding resin composition in this way, it is possible to quantitatively control the domain structure of component (B) relative to component (A) to obtain a domain structure having a predetermined non-uniform state, thereby reducing the occurrence of creaking noises and the like due to stick-slip and enabling the sliding resin composition to exhibit excellent sliding properties.
  • the maximum particle size ( ⁇ 2) of a given domain is also an indicator of whether the domain is in a non-uniform state, and can usually be measured with high accuracy by using an image analysis method. That is, it has been found separately that when the number of domains for measuring the predetermined circle equivalent diameter is increased in order from one point, the sliding property saturates and shows a constant value at about four or five points.
  • the area ratio of domains derived from component (B) and having an equivalent circle diameter of 10 ⁇ m or more may be referred to as the area ratio of domains derived from component (B) of 10 ⁇ m or more, or simply the area ratio of predetermined domains) per unit area is within a range of 0.5 to 20%.
  • the area ratio ( ⁇ 3) of a predetermined domain is also an index of whether the domain is in a non-uniform state, and can usually be measured with high accuracy by using an image analysis method.
  • a lubricant agent is further contained as component (C), and the blending amount of component (C) is set to a value within the range of 0.1 to 10 parts by weight per 100 parts by weight of component (A).
  • the component (D) further contains a polyolefin resin other than the component (B), and that the blending amount of the polyolefin resin is set to a value within the range of 1 to 10 parts by weight per 100 parts by weight of the component (A).
  • the incorporation of a predetermined amount of polyolefin resin as component (D) in this manner contributes to the appropriate dispersion of various compounded components, including component (B). Therefore, even when molded into a sliding resin member, the generation of creaking noises and the like due to stick-slip is further reduced over a long period of time, and excellent sliding properties can be exhibited.
  • a carbon material is further contained as component (E), and the blending amount of component (E) is set to a value within the range of 0.01 to 10 parts by weight per 100 parts by weight of component (A).
  • Carbon black or the like of the carbon material (E) component absorbs or adsorbs the lubricant and contributes to more appropriate dispersion, and therefore, even when molded into a sliding resin member, the generation of creaking noises and the like due to stick-slip can be further reduced over a long period of time.
  • a first embodiment provides a sliding resin composition containing at least the following components (A) and (B), wherein domains having an equivalent circle diameter of 10 ⁇ m or more per unit area derived from component (B) that are non-uniformly dispersed in component (A) are selected, and the average value ( ⁇ 1) of the equivalent circle diameters of the selected domains is set to a value within a range of 10 to 30 ⁇ m, thereby solving the above-mentioned problem.
  • polyacetal resins are polymeric compounds whose main constituent unit is an oxymethylene group (—CH 2 O—), and polyacetal resins include polyacetal homopolymers consisting only of oxymethylene units and polyacetal copolymers containing oxymethylene units and comonomer units. Although either a polyacetal homopolymer or a polyacetal copolymer can be used, it can be said that a polyacetal copolymer is more preferable in terms of thermal stability.
  • polyacetal homopolymers examples include “Delrin” (trade name) manufactured by DuPont USA and “Tenac” (trade name) manufactured by Asahi Kasei Corporation.
  • polyacetal copolymers examples include “Duracon” (trade name) manufactured by Polyplastics Co., Ltd., “Iupital” (trade name) manufactured by Global Polyacetal Corporation, and “Tenac C” (trade name) manufactured by Asahi Kasei Corporation.
  • the area ratio ( ⁇ 3) of the predetermined domain exceeds 20%, the surface smoothness of the molded product may be impaired, the appearance may deteriorate, and molding defects such as peeling may easily occur. Therefore, it is preferable that the area ratio ( ⁇ 3) of the predetermined domain is set to a value within the range of 1 to 10%, and more preferably within the range of 1.5 to 5%.
  • FIG. 4(a) the relationship between the area ratio ( ⁇ 3) of a predetermined domain and the allowable surface pressure (MPa) in the case of using a sliding resin composition containing no carbon material will be described. That is, in FIG. 4(a), the horizontal axis shows the area ratio ( ⁇ 3) of a predetermined domain in a sliding resin composition containing predetermined compounding components, and the vertical axis shows the allowable surface pressure (MPa) measured by the method shown in Example 1, etc. Furthermore, as can be seen from the characteristic curve in FIG. 4(a), the larger the area ratio ( ⁇ 3) of the predetermined domain, the larger the value of the allowable surface pressure (MPa) becomes, but there is a tendency for this to gradually saturate.
  • FIG. 6(b) shows the relationship between the average value ( ⁇ 1) of the predetermined domains and the area ratio ( ⁇ 3) of the predetermined domains in a predetermined sliding agent composition (containing a carbon material), and the tendency is substantially the same as that of the characteristic curve in FIG. 5(b).
  • the area ratio ( ⁇ 4) of the predetermined domain is set to a value within the range of 10 to 80%, and even more preferable that it is set to a value within the range of 20 to 60%. It should be noted that particles of a size that cannot be recognized by image analysis, which are considered to account for approximately 1% or less of the total particle area, have been found to have almost no effect on the calculation of ⁇ 1 to ⁇ 4 and can be ignored.
  • Lubricating Oil Agent (1) Types It is preferable to blend, as component (C), a lubricating oil agent that is liquid at room temperature or that becomes liquid when heated during molding in the sliding resin composition.
  • lubricants that are liquid at room temperature include at least one of paraffinic and naphthenic mineral oils such as spindle oil, refrigeration oil, dynamo oil, turbine oil, machine oil, cylinder oil, and gear oil; animal oils such as whale oil; vegetable oils such as castor oil and jojoba oil; and synthetic oils such as esters, polyglycols, polyphenyl ethers, silicones, and halocarbons.
  • lubricants that become liquid when heated during molding may also include waxy substances such as natural waxes such as montan wax and carnauba wax, hydrocarbon waxes, higher fatty acids, and waxes obtained by deriving higher fatty acids.
  • higher fatty acids include at least one of higher saturated fatty acids having approximately 12 or more carbon atoms, such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, cerotic acid, and montanic acid, and unsaturated fatty acids having 18 or more carbon atoms, such as oleic acid, linoleic acid, linolenic acid, elaidic acid, octadecenoic acid, arachidonic acid, cadreic acid, erucic acid, and parinaric acid.
  • waxes obtained by deriving higher fatty acids include higher fatty acid esters, higher fatty acid amides, and higher fatty acid salts.
  • the polyolefin resin is preferably a modified polyolefin resin to which a reactive functional group has been added.
  • the reactive functional group include a carboxyl group, an acid anhydride group, an epoxy group, an oxazoline group, an amino group, and an isocyanate group.
  • the polyolefin resin (D) may also be a copolymer containing a structural unit derived from ethylene and a structural unit having a reactive functional group.
  • the structural unit having a reactive functional group include glycidyl methacrylate (GMA) having an epoxy group.
  • ethylene-glycidyl methacrylate copolymer examples include ethylene-glycidyl methacrylate copolymer, ethylene-vinyl acetate-glycidyl methacrylate copolymer, and ethylene-methyl acrylate-glycidyl methacrylate copolymer.
  • the amount of blended polyolefin resin (D) is more preferably within the range of 0.1 to 5 parts by weight, and even more preferably within the range of 0.5 to 3 parts by weight, per 100 parts by weight of the component (A).
  • Typical examples of commercially available polyolefin resins include ethylene-glycidyl methacrylate copolymers such as Bondfast E manufactured by Sumitomo Chemical Co., Ltd., maleic anhydride-modified low-density polyethylene such as Admer NR106 manufactured by Mitsui Chemicals, and maleic anhydride-modified ultra-high molecular weight polyethylene such as Lubmer LY1040 manufactured by Mitsui Chemicals, Ltd.
  • component (E) Carbon Material (1) Type It is preferable to blend a predetermined amount of a carbon material as component (E) with component (A), which is the main resin.
  • the type of carbon material of component (E) is not particularly limited, but it is preferably at least one of carbon blacks such as natural or artificial graphite, furnace black, acetylene black, thermal black, and channel black, and carbon materials (carbon fibers) such as carbon nanofibers and carbon nanotubes.
  • carbon blacks such as natural or artificial graphite
  • furnace black acetylene black
  • thermal black and channel black
  • carbon materials carbon fibers
  • an excellent coloring effect can be achieved even with a relatively small amount.
  • the material is a carbon material, it will function as a carrier for absorbing and retaining the lubricant, and the durability, lubricity, heat resistance, etc. of the sliding member can be further improved.
  • the primary particle size of the carbon material of component (E) is less than about 200 nm.
  • the primary particle size of component (E) is more preferably 5 nm to 150 nm, and even more preferably 10 nm to 100 nm.
  • the DBP oil absorption of the carbon material of component (E) is 100 ml/100 g or more.
  • the reason for this is that by blending a carbon material having such a DBP oil absorption, it is possible to absorb and retain a larger amount of lubricant, which in turn may make it easier to suppress the occurrence of creaking noises and the like. Therefore, it is more preferable that the DBP oil absorption of component (E) be 200 ml/100 g or more, and even more preferable that it be 300 ml/100 g or more.
  • the carbon material preferably has a hollow structure and a kind of porous structure, and more preferably has a moderate chain structure.
  • Examples of carbon materials having these structures include “Carbon ECP (trade name)” and “Ketjenblack EC-600JD (trade name)” manufactured by Lion Specialty Chemicals.
  • the amount of the carbon material to be blended will vary depending on the application of the sliding member, but is usually preferably 0.01 to 10 parts by weight per 100 parts by weight of component (A).
  • the reason for this is that by adjusting the blending amount of the carbon material to a value within a predetermined range, it may be possible to further improve the durability, lubricity, heat resistance, etc. of the sliding member. Therefore, the amount of the carbon material to be added will vary depending on factors such as the application of the sliding member, but is usually preferably 0.5 parts by weight or less, even more preferably 0.05 to 0.4 parts by weight, and particularly preferably 0.08 to 0.3 parts by weight, per 100 parts by weight of component (A).
  • Additive 2 It is also preferable to further add at least one of various other stabilizers such as ultraviolet absorbers, antioxidants, and heat stabilizers to further improve the light stability, durability, heat resistance, etc. of the sliding member. Therefore, the amount of such stabilizer to be added will vary depending on factors such as the application of the sliding member, but is usually set to a value within the range of 0.001 to 1 part by weight, more preferably 0.005 to 0.5 parts by weight, and even more preferably 0.008 to 0.2 parts by weight, per 100 parts by weight of component (A).
  • various other stabilizers such as ultraviolet absorbers, antioxidants, and heat stabilizers to further improve the light stability, durability, heat resistance, etc. of the sliding member. Therefore, the amount of such stabilizer to be added will vary depending on factors such as the application of the sliding member, but is usually set to a value within the range of 0.001 to 1 part by weight, more preferably 0.005 to 0.5 parts by weight, and even more preferably 0.008 to 0.2 parts by weight, per 100
  • the sliding resin composition it is also preferable to compound at least one functional additive such as various colorants (excluding carbon materials), release agents, antistatic agents, surfactants, etc.
  • the amount of such functional additives to be added will vary depending on the type of additive, the intended use of the sliding member, and other factors, but is usually set to a value within the range of preferably 0.001 to 10 parts by weight, more preferably 0.01 to 5 parts by weight, and even more preferably 0.1 to 1 part by weight, per 100 parts by weight of component (A).
  • the sliding resin composition can be easily prepared by a known method that is generally used as a method for preparing conventional resin compositions. For example, at least the components (A) and (B) are essential components, and the optional components (C) to (E) and any other additives are weighed in predetermined amounts, and these are mixed until homogeneous in a mixer such as a Henschel mixer, a super mixer, a ball mill, or a tumbler mixer to first prepare a mixture.
  • a mixer such as a Henschel mixer, a super mixer, a ball mill, or a tumbler mixer to first prepare a mixture.
  • the obtained mixture is fed into a single- or twin-screw extruder, which is typically an extruder, in accordance with a known production method, and melt-kneaded at a predetermined temperature and a predetermined pressure to form a string-like molded product, which is then cut into pellets.
  • a single- or twin-screw extruder which is typically an extruder, in accordance with a known production method, and melt-kneaded at a predetermined temperature and a predetermined pressure to form a string-like molded product, which is then cut into pellets.
  • the sliding resin composition has good molding processability such as good bite into the screw of a molding machine, and a sliding member formed by molding the sliding resin composition can be easily produced by a conventional injection molding machine or extrusion molding machine.
  • the obtained sliding member has significantly improved load-bearing capacity without impairing its mechanical properties, and is able to prevent abnormal noises such as creaking during sliding friction with a mating material, as well as significantly improved sliding characteristics including low friction and wear resistance.
  • the second embodiment is a sliding resin member having as a constituent component a sliding resin composition containing the following components (A) and (B), in which domains of 10 ⁇ m or more derived from at least component (B) are unevenly dispersed in component (A):
  • the sliding resin member is characterized in that domains derived from component (B) having an equivalent circle diameter of 10 ⁇ m or more per unit area of any cross section are selected, and the average value ( ⁇ 1) of the equivalent circle diameters of the selected domains is set to a value within the range of 10 to 30 ⁇ m.
  • A 100 parts by weight of at least one main resin selected from the group consisting of polyacetal resin, polyamide resin, polybutylene terephthalate resin, and polycarbonate resin;
  • B 1 to 70 parts by weight of an olefin-based elastomer and/or a styrene-based elastomer.
  • the sliding resin composition of the second embodiment can be the same as the sliding resin composition of the first embodiment, and therefore, a repeated explanation will be omitted here.
  • A1 As component (A), a polyacetal resin (copolymer) ("DURACON M90-44 (trade name)” manufactured by Polyplastics Co., Ltd.) was prepared.
  • An EPDM having an ethylene content of 65% by weight, 5-ethylidene-2-norbornene (ENB) as the diene component (diene content: 4.6% by weight), and a Mooney viscosity ML(1+4) at 125°C of 61 (“Mitsui EPT3092PM (trade name)" manufactured by Mitsui Chemicals, Inc.) was prepared.
  • (B2) An EPDM [EP57C (trade name) manufactured by ENEOS Materials Corporation] having an ethylene content of 67% by weight, 5-ethylidene-2-norbornene (ENB) as the diene component (diene content: 4.5% by weight), and a Mooney viscosity ML(1+4) of 58 at 125°C was prepared.
  • (B3) A CEBC (DYNARON 6201B (trade name) manufactured by ENEOS Materials Corporation) which is an olefin-ethylene-butylene-olefin block polymer and has a melt flow rate of less than 0.1 g/10 min at a temperature of 230° C. and a load of 2.16 kg was prepared.
  • SBR styrene-butadiene rubber
  • the obtained sliding resin composition was supplied to a twin-screw extruder (Process 11 manufactured by Thermo Fisher Scientific, screw diameter 11 mm) and melt-kneaded under conditions of (200°C, 300 rpm) to form a string-like molded product, which was then cut with a pelletizer to prepare a pellet material.
  • this pellet material was injection molded using a screw-type injection molding machine (SE50-DUZ, manufactured by Sumitomo Heavy Industries, Ltd., screw diameter 25 mm) to obtain a plate-shaped sliding member of 30 mm square and 3 mm thick.
  • Evaluation 1 (average value of domains of 10 ⁇ m or more: ⁇ 1)
  • the plate-shaped sliding member as a test piece was cut to an arbitrary size, embedded in epoxy resin, and polished to prepare a sample for observation.
  • observation images were taken at 100 to 500 magnifications using a scanning electron microscope (SEM). Specifically, the observation images (Examples 12 and 15) shown in FIGS. 12(a) and 12(b) were obtained.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une composition de résine glissante dans laquelle des domaines hétérogènes prescrits dérivés de composants de mélange sont formés et des bruits anormaux tels que des bruits de grincement sont peu nombreux même si la composition est moulée ou traitée en une variété d'éléments en résine glissants. Cette composition de résine glissante et cet élément en résine glissant dérivé de celle-ci contiennent au moins les composants (A) et (B). Lorsque des domaines qui sont dérivés du composant (B) et ont un diamètre de cercle équivalent supérieur ou égal à 10 µm sont sélectionnés, la valeur moyenne (φ1) des diamètres de cercle équivalents des domaines sélectionnés est comprise entre 10 et 30 µm. (A) 100 parties en poids d'au moins une résine primaire telle qu'une résine de polyacétal. (B) 1 à 70 parties en poids d'un élastomère tel qu'un élastomère oléfinique.
PCT/JP2025/001546 2024-02-06 2025-01-20 Composition de résine glissante et élément en résine glissant Pending WO2025169700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-016250 2024-02-06
JP2024016250 2024-02-06

Publications (1)

Publication Number Publication Date
WO2025169700A1 true WO2025169700A1 (fr) 2025-08-14

Family

ID=96699638

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/001546 Pending WO2025169700A1 (fr) 2024-02-06 2025-01-20 Composition de résine glissante et élément en résine glissant

Country Status (1)

Country Link
WO (1) WO2025169700A1 (fr)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013119A1 (fr) * 1990-02-21 1991-09-05 Exxon Chemical Limited Polyester thermoplastique ayant des caracteristiques d'impact ameliorees.
JPH05295223A (ja) * 1992-04-21 1993-11-09 Tonen Corp 熱可塑性エラストマー組成物
JP2000063654A (ja) * 1998-08-24 2000-02-29 Otsuka Chem Co Ltd ポリカーボネート系樹脂組成物及びそれを用いた摺動部材
JP2000265048A (ja) * 1999-03-15 2000-09-26 Polyplastics Co 熱可塑性ポリエステル樹脂組成物
US6235840B1 (en) * 1998-03-11 2001-05-22 Uniroyal Chemical Company, Inc. Nylon modifiers having enhanced flow properties
JP3200279B2 (ja) * 1994-03-24 2001-08-20 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー ポリアセタール樹脂組成物および摺動部品
JP2005290130A (ja) * 2004-03-31 2005-10-20 Nof Corp エンジニアリングプラスチック組成物
JP2010270203A (ja) * 2009-05-20 2010-12-02 Oiles Ind Co Ltd ポリアセタール樹脂組成物及び摺動部材
JP2016204480A (ja) * 2015-04-20 2016-12-08 帝人株式会社 ポリカーボネート樹脂組成物
WO2018123834A1 (fr) * 2016-12-27 2018-07-05 オイレス工業株式会社 Composition de résine polyacétalique et élément coulissant
JP2018123178A (ja) * 2017-01-30 2018-08-09 東レ株式会社 摺動部材用ポリアミド樹脂、および摺動部材用ポリアミド樹脂組成物、ならびにそれらの成形品
JP2020139028A (ja) * 2019-02-27 2020-09-03 テクノＵｍｇ株式会社 打音の低減された熱可塑性樹脂組成物及び成形品
WO2021215264A1 (fr) * 2020-04-21 2021-10-28 オイレス工業株式会社 Composition de résine de polyamide et élément coulissant

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013119A1 (fr) * 1990-02-21 1991-09-05 Exxon Chemical Limited Polyester thermoplastique ayant des caracteristiques d'impact ameliorees.
JPH05295223A (ja) * 1992-04-21 1993-11-09 Tonen Corp 熱可塑性エラストマー組成物
JP3200279B2 (ja) * 1994-03-24 2001-08-20 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー ポリアセタール樹脂組成物および摺動部品
US6235840B1 (en) * 1998-03-11 2001-05-22 Uniroyal Chemical Company, Inc. Nylon modifiers having enhanced flow properties
JP2000063654A (ja) * 1998-08-24 2000-02-29 Otsuka Chem Co Ltd ポリカーボネート系樹脂組成物及びそれを用いた摺動部材
JP2000265048A (ja) * 1999-03-15 2000-09-26 Polyplastics Co 熱可塑性ポリエステル樹脂組成物
JP2005290130A (ja) * 2004-03-31 2005-10-20 Nof Corp エンジニアリングプラスチック組成物
JP2010270203A (ja) * 2009-05-20 2010-12-02 Oiles Ind Co Ltd ポリアセタール樹脂組成物及び摺動部材
JP2016204480A (ja) * 2015-04-20 2016-12-08 帝人株式会社 ポリカーボネート樹脂組成物
WO2018123834A1 (fr) * 2016-12-27 2018-07-05 オイレス工業株式会社 Composition de résine polyacétalique et élément coulissant
JP2018123178A (ja) * 2017-01-30 2018-08-09 東レ株式会社 摺動部材用ポリアミド樹脂、および摺動部材用ポリアミド樹脂組成物、ならびにそれらの成形品
JP2020139028A (ja) * 2019-02-27 2020-09-03 テクノＵｍｇ株式会社 打音の低減された熱可塑性樹脂組成物及び成形品
WO2021215264A1 (fr) * 2020-04-21 2021-10-28 オイレス工業株式会社 Composition de résine de polyamide et élément coulissant

Similar Documents

Publication Publication Date Title
JP4173444B2 (ja) ポリエチレン樹脂組成物
EP0618262B1 (fr) Composition de résine polyacétal et corps glissant
TWI876076B (zh) 乙烯系聚合體組成物及其用途
JP7762649B2 (ja) ポリアミド樹脂組成物及び摺動部材
US20250060003A1 (en) Resin composition for sliding member, and sliding member
EP3564311B1 (fr) Composition de résine polyacétalique et élément coulissant
WO2025169700A1 (fr) Composition de résine glissante et élément en résine glissant
JP7149766B2 (ja) 摺動部材用樹脂組成物及び摺動部材
JP3107678B2 (ja) ポリアセタール樹脂組成物および摺動部材
CN1836006B (zh) 滑动部件用树脂组合物和滑动部件
CN115768834B (zh) 滑动部件用树脂组合物和滑动部件
JPWO2019065465A1 (ja) 耐ダスト摺動性部材用樹脂組成物、耐ダスト摺動性部材及びその製造方法、ウィンドウレギュレータ用キャリアプレート、耐ダスト摺動性の発現方法
JP7587209B2 (ja) 摺動部品用ポリアミド樹脂組成物、及び摺動部品
JP4474852B2 (ja) 摺動部材用樹脂組成物および摺動部材
JPH11158371A (ja) ポリアミド樹脂組成物
JP2023041360A (ja) 成形品、成形品の製造方法および成形品の外観性向上方法
JP4504252B2 (ja) プロテクター
JP2006117891A (ja) 熱可塑性樹脂系摺動材

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 25752122

Country of ref document: EP

Kind code of ref document: A1