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
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
  • C08L81/06—Polysulfones; Polyethersulfones

Definitions

• Aromatic polyethersulfone has excellent properties such as heat resistance, mechanical properties, electrical properties, hot water resistance, etc. Therefore, molded articles made using aromatic polyethersulfone are used for various applications in the fields of electric and electronics, machinery, automobiles, aircraft, medical and food industry, etc.
• the molded articles for these applications may have complex shapes, and the aromatic polyethersulfone may adhere to the mold during molding, resulting in molding defects. For this reason, it is common to add a mold release agent to the aromatic polyethersulfone.
• Aromatic polyethersulfones are typically resins having repeating units that contain a divalent aromatic group (a residue formed by removing two hydrogen atoms bonded to an aromatic ring from an aromatic compound), a sulfonyl group (-SO 2 -), and an oxygen atom (-O-). From the viewpoint of heat resistance and chemical resistance, the aromatic polyethersulfone preferably has a repeating unit represented by the following formula (1) (hereinafter also referred to as "repeating unit (1)").
• the aromatic polyethersulfone may further have one or more other repeating units, such as a repeating unit represented by the following formula (2) (hereinafter also referred to as “repeating unit (2)”) and a repeating unit represented by the following formula (3) (hereinafter also referred to as “repeating unit (3)").
• repeating unit (2) a repeating unit represented by the following formula (2)
• repeating unit (3) a repeating unit represented by the following formula (3)
• Ph 5 represents a phenylene group. Each hydrogen atom of 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, a plurality of Ph 5s may be the same or different.
• Examples of the alkyl group that can substitute for a hydrogen atom of the phenylene group in Ph 1 to Ph 5 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a s-butyl group, a t-butyl group, an n-hexyl group, a 2-ethylhexyl group, an n-octyl group, an n-decyl group, etc., and an alkyl group having 1 to 10 carbon atoms is preferable.
• the alkyl group may be linear or branched.
• the aryl group may be a single ring or a condensed ring.
• the aryl group may also be a group in which a hydrogen atom in an aromatic ring is substituted with an alkyl group, such as a tolyl group.
• the alkylidene group for R includes a methylene group, an ethylidene group, an isopropylidene group, an n-butylidene group, a 2-ethylhexylidene group, etc., and an alkylidene group having 1 to 10 carbon atoms is preferred.
• the reduced viscosity of the aromatic polyethersulfone is equal to or less than the above-mentioned preferable upper limit, the molding temperature and melt viscosity do not become too high, and it is easy to mold a molded article into a predetermined shape.
• the reduced viscosity of the aromatic polyethersulfone is equal to or higher than the above preferable lower limit, the heat resistance, strength and rigidity are further improved.
• aromatic polyethersulfone pellets of this embodiment one type of aromatic polyethersulfone may be used alone, or two or more types may be used in combination.
• a resin having repeating unit (1) can be produced by using a compound represented by the following formula (4) (hereinafter also referred to as "compound (4)") as the dihalogenosulfone compound and a compound represented by the following formula (5) as the dihydroxy compound.
• Ph 2 each independently represent a phenylene group.
• the hydrogen atoms of the phenylene group may each independently be substituted with an alkyl group, an aryl group, or a halogen atom.
• the higher fatty acid may be used alone or in combination of two or more kinds.
• the releasability is further improved.
• the transparency is further improved.
• the content of higher fatty acid does not mean the amount of higher fatty acid charged, but means the content measured by the following method.
• the aromatic polyethersulfone pellets of this embodiment are dissolved in an IS solution, then derivatized and filtered through a 0.45 ⁇ m membrane filter. The filtered material is measured by GC-FID under the following conditions, and the content of higher fatty acids in the aromatic polyethersulfone pellets can be determined by the internal standard method.
• the IS solution is a solution of o-terphenyl dissolved in N,N-dimethylformamide.
• the above-mentioned derivatization treatment is a treatment in which a trimethylsilylating agent is added and the mixture is heated at 70° C. for 30 minutes.
• the aromatic polyethersulfone pellets of this embodiment are pellets consisting only of aromatic polyethersulfone and higher fatty acids, so the aromatic polyethersulfone content is the total amount of the aromatic polyethersulfone pellets minus the content of higher fatty acids determined by the above method.
• the content of the aromatic polyethersulfone is 99.9% by mass or less, and preferably 99.89% by mass or less, based on the total amount of the aromatic polyethersulfone pellets.
• the content of the aromatic polyethersulfone is 99% by mass or more, preferably 99.2% by mass or more, and more preferably 99.3% by mass or more, based on the total amount of the aromatic polyethersulfone pellets.
• the content of the aromatic polyethersulfone is preferably 99.2% by mass or more and 99.9% by mass or less, and more preferably 99.3% by mass or more and 99.89% by mass or less, based on the total amount of the aromatic polyethersulfone pellets.

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

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Citations (4)

• 2023
  • 2023-12-26 JP JP2024567858A patent/JPWO2024143362A1/ja active Pending
  • 2023-12-26 WO PCT/JP2023/046668 patent/WO2024143362A1/ja active Application Filing

Patent Citations (4)

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