WO2024185657A1 - プレポリマー組成物、ポリウレタン樹脂、弾性成形品およびプレポリマー組成物の製造方法 - Google Patents
プレポリマー組成物、ポリウレタン樹脂、弾性成形品およびプレポリマー組成物の製造方法 Download PDFInfo
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- WO2024185657A1 WO2024185657A1 PCT/JP2024/007648 JP2024007648W WO2024185657A1 WO 2024185657 A1 WO2024185657 A1 WO 2024185657A1 JP 2024007648 W JP2024007648 W JP 2024007648W WO 2024185657 A1 WO2024185657 A1 WO 2024185657A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
Definitions
- the present invention relates to a prepolymer composition, a polyurethane resin, an elastic molded article, and a method for producing the prepolymer composition.
- Polyurethane resins for example, have soft segments formed by the reaction of polyisocyanate and high molecular weight polyol, and hard segments formed by the reaction of polyisocyanate and chain extender.
- a polyurethane resin obtained by the following method is known. That is, first, 4,4'-diphenylmethane diisocyanate and polytetramethylene ether glycol (Mn 1000) are reacted at 80°C to obtain an isocyanate-terminated prepolymer with an isocyanate group concentration of 5.6%. Next, the isocyanate-terminated prepolymer is reacted with 1,4-butylene glycol at 80°C to obtain a polyurethane resin (see, for example, Patent Document 1 (Example 6)).
- polyurethane resins may be required to have excellent appearance and mechanical properties depending on the application.
- the present invention includes a prepolymer composition capable of producing a polyurethane resin having excellent appearance and mechanical properties, a polyurethane resin and an elastic molded article obtained from the prepolymer composition, and a method for producing the prepolymer composition.
- the present invention is a prepolymer composition containing an isocyanate-terminated prepolymer, the isocyanate-terminated prepolymer containing a reaction product of a polyisocyanate component and a polyol component, the polyisocyanate component containing diphenylmethane diisocyanate, the polyol component containing a high molecular weight polyol and a low molecular weight polyol, the high molecular weight polyol containing a high molecular weight polyether polyol having a number average molecular weight of more than 700 and less than 1300, the low molecular weight polyol containing a low molecular weight polyether polyol having a number average molecular weight of more than 150 and less than 350, the isocyanate group concentration of the prepolymer composition being 6.0 mass% or more and 8.0 mass% or less, and the content ratio of the low molecular weight polyol to the total amount of the polyisocyanate component, the
- the present invention [2] comprises a reaction product of a prepolymer composition and a chain extender, the prepolymer composition comprises an isocyanate-terminated prepolymer, the isocyanate-terminated prepolymer comprises a reaction product of a polyisocyanate component and a polyol component, the polyisocyanate component comprises diphenylmethane diisocyanate, the polyol component comprises a high molecular weight polyol and a low molecular weight polyol, and the high molecular weight polyol has a number average molecular weight of more than 700 and less than 1,300.
- the polyurethane resin contains a high molecular weight polyether polyol having a number average molecular weight of more than 150 and less than 350
- the low molecular weight polyol contains a low molecular weight polyether polyol having a number average molecular weight of more than 150 and less than 350
- the isocyanate group concentration of the prepolymer composition is 6.0 mass% or more and 8.0 mass% or less
- the content ratio of the low molecular weight polyol to the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol exceeds 0.05 mol/kg and is less than 0.40 mol/kg.
- the present invention [3] includes an elastic molded article that contains the polyurethane resin described in [2] above.
- the present invention [4] is a method for producing a prepolymer composition containing an isocyanate-terminated prepolymer, comprising the steps of preparing a polyisocyanate component and a polyol component, and reacting the polyisocyanate component with the polyol component to synthesize an isocyanate-terminated prepolymer, the polyisocyanate component containing diphenylmethane diisocyanate, the polyol component containing a high molecular weight polyol and a low molecular weight polyol, and the high molecular weight polyol has a number average molecular weight of more than 700 and less than 1.
- the prepolymer composition includes a high molecular weight polyether polyol having a number average molecular weight of less than 300, and the low molecular weight polyol includes a low molecular weight polyether polyol having a number average molecular weight of more than 150 and less than 350, the isocyanate group concentration of the prepolymer composition is 6.0 mass% or more and 8.0 mass% or less, and the content ratio of the low molecular weight polyol to the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol exceeds 0.05 mol/kg and is less than 0.40 mol/kg.
- a high molecular weight polyether polyol having a number average molecular weight in a specified range and a low molecular weight polyether polyol having a number average molecular weight in a specified range are used as raw materials.
- the isocyanate group concentration is adjusted to a specified range.
- the content ratio of the low molecular weight polyol relative to the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol is adjusted to a specified range.
- the polyurethane resin and elastic molded article of the present invention are obtained using the above prepolymer composition. Therefore, the polyurethane resin and elastic molded article of the present invention have excellent appearance and mechanical properties.
- the above prepolymer composition can be obtained by the method for producing the prepolymer composition of the present invention.
- the polyurethane resin contains a reaction product of a prepolymer composition (first liquid) and a chain extender (second liquid).
- the polyurethane resin is preferably a reaction product of a prepolymer composition (first liquid) and a chain extender (second liquid). That is, the polyurethane resin is preferably a urethane cured product obtained by reacting and curing the prepolymer composition and the chain extender.
- the prepolymer composition (first liquid) and the chain extender (second liquid) are prepared, for example, as a resin kit.
- a urethane reaction occurs.
- the prepolymer composition (first liquid) contains an isocyanate-terminated prepolymer as an essential component.
- the isocyanate-terminated prepolymer contains a reaction product of a polyisocyanate component and a polyol component.
- the isocyanate-terminated prepolymer is a reaction product of a polyisocyanate component and a polyol component.
- Polyisocyanate Component contains diphenylmethane diisocyanate (MDI) as an essential component.
- MDI diphenylmethane diisocyanate
- Examples of diphenylmethane diisocyanate include diphenylmethane diisocyanate monomer and diphenylmethane diisocyanate derivatives.
- diphenylmethane diisocyanate monomers examples include 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, and 2,2'-diphenylmethane diisocyanate. These can be used alone or in combination of two or more types.
- Diphenylmethane diisocyanate derivatives include modified products obtained by modifying the above diphenylmethane diisocyanate monomer by known methods.
- modified products include polymers, isocyanurate modified products, allophanate modified products, polyol modified products, biuret modified products, urea modified products, oxadiazinetrione modified products, and carbodiimide modified products.
- Diphenylmethane diisocyanate derivatives also include polymethylene polyphenylene polyisocyanate (polymeric MDI). These can be used alone or in combination of two or more types.
- diphenylmethane diisocyanate preferably, diphenylmethane diisocyanate monomer is used, and more preferably, 4,4'-diphenylmethane diisocyanate is used.
- the polyisocyanate component may contain other polyisocyanates as optional components, provided that the excellent effects of the present invention are not impaired.
- examples of other polyisocyanates include other polyisocyanate monomers and other polyisocyanate derivatives.
- polyisocyanate monomers include, for example, aromatic polyisocyanates other than MDI, aliphatic polyisocyanates, and aromatic aliphatic polyisocyanates.
- aromatic polyisocyanates other than MDI include tolylene diisocyanate (TDI), toluidine diisocyanate (TODI), paraphenylene diisocyanate, and naphthalene diisocyanate (NDI).
- aliphatic polyisocyanates include linear aliphatic polyisocyanates and alicyclic polyisocyanates.
- linear aliphatic polyisocyanates examples include ethylene diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate (PDI), and hexamethylene diisocyanate (HDI).
- alicyclic polyisocyanates include isophorone diisocyanate (IPDI), norbornene diisocyanate (NBDI), methylene bis(cyclohexyl isocyanate) (H 12 MDI), and bis(isocyanatomethyl)cyclohexane (H 6 XDI).
- aromatic aliphatic polyisocyanates examples include xylylene diisocyanate (XDI) and tetramethyl xylylene diisocyanate (TMXDI).
- XDI xylylene diisocyanate
- TMXDI tetramethyl xylylene diisocyanate
- Other polyisocyanate monomers can be used alone or in combination of two or more.
- polyisocyanate derivatives include the above-mentioned modified products obtained by modifying other polyisocyanate monomers by known methods. These can be used alone or in combination of two or more types.
- the other polyisocyanates can be used alone or in combination of two or more kinds.
- the content of the other polyisocyanates is, for example, 50% by mass or less, preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, and particularly preferably 0% by mass, based on the total amount of the polyisocyanate components.
- the content of diphenylmethane diisocyanate is, for example, 50% by mass or more, preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and particularly preferably 100% by mass, based on the total amount of the polyisocyanate component.
- the polyisocyanate component is particularly preferably composed of diphenylmethane diisocyanate.
- the polyol component reacts with the polyisocyanate component to synthesize an isocyanate-terminated prepolymer.
- the polyol component contains a high molecular weight polyol and a low molecular weight polyol.
- the polyol component is preferably composed of a high molecular weight polyol and a low molecular weight polyol.
- the high molecular weight polyol has two or more hydroxyl groups in the molecule and is a relatively high molecular weight organic compound.
- the number average molecular weight of the high molecular weight polyol is, for example, more than 400, preferably 500 or more.
- the number average molecular weight of the high molecular weight polyol is, for example, 5000 or less, preferably 4000 or less, more preferably 3000 or less, and even more preferably 2000 or less.
- the number average molecular weight can be determined as a polystyrene equivalent molecular weight by a known gel permeation chromatography method (same below).
- the average number of functional groups (average number of hydroxyl groups) of the high molecular weight polyol is, for example, 2 or more.
- the average number of functional groups (average number of hydroxyl groups) of the high molecular weight polyol is, for example, 6 or less, preferably 4 or less, and more preferably 3 or less.
- the average number of functional groups (average number of hydroxyl groups) of the high molecular weight polyol is particularly preferably 2.
- the high molecular weight polyol contains a high molecular weight polyether polyol as an essential component.
- high molecular weight polyether polyols include high molecular weight polytetramethylene ether polyols and high molecular weight polyoxy (C2-3) alkylene polyols.
- high molecular weight polytetramethylene ether polyols include crystalline high molecular weight polytetramethylene ether polyols.
- crystalline high molecular weight polytetramethylene ether polyols include ring-opening polymers obtained by cationic polymerization of tetrahydrofuran.
- high molecular weight polytetramethylene ether polyols include amorphous high molecular weight polytetramethylene ether polyols.
- Amorphous high molecular weight polytetramethylene ether polyols are obtained by copolymerization of tetrahydrofuran with alkyl-substituted tetrahydrofuran and/or dihydric alcohol. Crystallinity refers to the property of being solid at 25°C.
- Amorphous refers to the property of being liquid at 25°C.
- High molecular weight polyoxyalkylene (C2-3) polyols are, for example, addition polymers of alkylene oxides using known low molecular weight polyols or known low molecular weight polyamines as initiators.
- alkylene oxides include alkylene oxides having 2 to 3 carbon atoms. More specific examples of alkylene oxides include ethylene oxide (IUPAC name: oxirane), propylene oxide (1,2-propylene oxide (IUPAC name: methyloxirane)), and triethylene oxide (1,3-propylene oxide). These alkylene oxides can be used alone or in combination of two or more types.
- Preferred examples of alkylene oxides include ethylene oxide and propylene oxide.
- high molecular weight polyoxyalkylene (C2-3) polyols include high molecular weight polyoxyethylene polyols, high molecular weight polyoxypropylene polyols, high molecular weight polyoxytriethylene polyols, and high molecular weight polyoxyethylene-polyoxypropylene polyols (random or block copolymers). These can be used alone or in combination of two or more types.
- the high molecular weight polyether polyol is preferably a high molecular weight polytetramethylene ether polyol, and more preferably a high molecular weight polytetramethylene ether glycol (high molecular weight PTMEG).
- the high molecular weight polyol can contain other high molecular weight polyols as optional components.
- the other high molecular weight polyols are high molecular weight polyols (number average molecular weight exceeding 400) other than the above-mentioned high molecular weight polyether polyols.
- the high molecular weight polyol preferably does not contain other high molecular weight polyols.
- the high molecular weight polyol preferably consists of a high molecular weight polyether polyol having the above number average molecular weight.
- the content of the high molecular weight polyol is, for example, 50 mol% or more, preferably 60 mol% or more, more preferably 70 mol% or more, and even more preferably 80 mol% or more, based on the total amount of the polyol components (total amount of the high molecular weight polyol and the low molecular weight polyol).
- the content of the high molecular weight polyol is, for example, 95 mol% or less, preferably 93 mol% or less, more preferably 90 mol% or less, and even more preferably 88 mol% or less, based on the total amount of the polyol components (total amount of the high molecular weight polyol and the low molecular weight polyol).
- the low molecular weight polyol has two or more hydroxyl groups in the molecule and is a relatively low molecular weight organic compound.
- the number average molecular weight of the low molecular weight polyol is, for example, 400 or less, preferably less than 350, and more preferably 300 or less.
- the number average molecular weight of the low molecular weight polyol is, for example, 50 or more, and preferably 150 or more.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is, for example, 2 or more.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is, for example, 6 or less, preferably 4 or less, and more preferably 3 or less.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is particularly preferably 2.
- the low molecular weight polyol contains a low molecular weight polyether polyol as an essential component.
- low molecular weight polyether polyols include low molecular weight polytetramethylene ether polyols and low molecular weight polyoxy (C2-3) alkylene polyols.
- low molecular weight polytetramethylene ether polyols include crystalline low molecular weight polytetramethylene ether polyols.
- crystalline low molecular weight polytetramethylene ether polyols include ring-opening polymers obtained by cationic polymerization of tetrahydrofuran.
- low molecular weight polytetramethylene ether polyols include amorphous low molecular weight polytetramethylene ether polyols.
- Amorphous low molecular weight polytetramethylene ether polyols are obtained by copolymerization of tetrahydrofuran with alkyl-substituted tetrahydrofuran and/or dihydric alcohol. Crystallinity refers to the property of being solid at 25°C.
- Amorphous refers to the property of being liquid at 25°C.
- Low molecular weight polyoxyalkylene (C2-3) polyols are, for example, addition polymers of alkylene oxides using a known low molecular weight polyol or a known low molecular weight polyamine as an initiator.
- alkylene oxides include alkylene oxides having 2 to 3 carbon atoms. More specific examples of alkylene oxides include ethylene oxide (IUPAC name: oxirane), propylene oxide (1,2-propylene oxide (IUPAC name: methyloxirane)), and triethylene oxide (1,3-propylene oxide). These alkylene oxides can be used alone or in combination of two or more types.
- Preferred examples of alkylene oxides include ethylene oxide and propylene oxide.
- low molecular weight polyoxyalkylene (C2-3) polyols include low molecular weight polyoxyethylene polyols, low molecular weight polyoxypropylene polyols, low molecular weight polyoxytriethylene polyols, and low molecular weight polyoxyethylene-polyoxypropylene polyols (random or block copolymers). These can be used alone or in combination of two or more types.
- the low molecular weight polyether polyol is preferably a low molecular weight polytetramethylene ether polyol, and more preferably a low molecular weight polytetramethylene ether glycol (low molecular weight PTMEG).
- the number average molecular weight of the low molecular weight polyether polyol exceeds 150, preferably is 200 or more, and more preferably is 230 or more. Also, from the viewpoint of the appearance and mechanical properties of the polyurethane resin, the number average molecular weight of the low molecular weight polyether polyol is less than 350, preferably is 300 or less, and more preferably is 280 or less.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyether polyol is, for example, 2 or more.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyether polyol is, for example, 6 or less, preferably 4 or less, and more preferably 3 or less.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyether polyol is particularly preferably 2.
- the low molecular weight polyol may contain other low molecular weight polyols as optional components.
- the other low molecular weight polyols are low molecular weight polyols (number average molecular weight 400 or less) other than the low molecular weight polyether polyols described above.
- Examples of other low molecular weight polyols include dihydric alcohols, trihydric alcohols, and tetrahydric or higher alcohols, which are described below. These may be used alone or in combination of two or more types.
- the low molecular weight polyol preferably does not contain other low molecular weight polyols.
- the low molecular weight polyol preferably consists of a low molecular weight polyether polyol having the above number average molecular weight.
- the content of the low molecular weight polyol is, for example, 5 mol% or more, preferably 7 mol% or more, more preferably 10 mol% or more, and even more preferably 12 mol% or more, based on the total amount of the polyol components (total amount of the high molecular weight polyol and the low molecular weight polyol).
- the content of the low molecular weight polyol is, for example, 50 mol% or less, preferably 40 mol% or less, more preferably 30 mol% or less, and even more preferably 20 mol% or less, based on the total amount of the polyol components (total amount of the high molecular weight polyol and the low molecular weight polyol).
- the content of the low molecular weight polyol is, for example, 1 part by mass or more, preferably 2 parts by mass or more, and more preferably 3 parts by mass or more, per 100 parts by mass of the high molecular weight polyol.
- the content of the low molecular weight polyol is, for example, 20 parts by mass or less, preferably 15 parts by mass or less, and more preferably 10 parts by mass or less, per 100 parts by mass of the high molecular weight polyol.
- the prepolymer composition is obtained as a reaction product liquid by, for example, reacting the above-mentioned polyisocyanate component with the above-mentioned polyol component.
- the prepolymer composition is produced by the following method. That is, for example, first, the above-mentioned polyisocyanate component and the above-mentioned polyol component are prepared (preparation step). Next, the above-mentioned polyisocyanate component and the above-mentioned polyol component are reacted in a predetermined ratio to synthesize an isocyanate-terminated prepolymer (prepolymer synthesis step).
- the equivalent ratio R1 (NCO/OH) of the isocyanate groups in the polyisocyanate component to the hydroxyl groups in the polyol component exceeds 1.0, and is preferably 1.5 or more, more preferably 1.8 or more, and even more preferably 2.0 or more.
- the equivalent ratio R1 (NCO/OH) of the isocyanate groups in the polyisocyanate component to the hydroxyl groups in the polyol component is, for example, 20 or less, preferably 10 or less, more preferably 5.0 or less, and even more preferably 3.0 or less.
- the content ratio of high molecular weight polyol and low molecular weight polyol in the polyol component is as described above.
- the content ratio of low molecular weight polyol relative to the total amount of polyisocyanate component, high molecular weight polyol, and low molecular weight polyol is adjusted from the viewpoints of ease of production, appearance, and mechanical properties of the polyurethane resin.
- the content of the low molecular weight polyol exceeds 0.05 mol/kg, and is preferably 0.06 mol/kg or more, more preferably 0.08 mol/kg or more, and even more preferably 0.10 mol/kg or more, based on the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol.
- the content of the low molecular weight polyol is less than 0.40 mol/kg, preferably 0.35 mol/kg or less, more preferably 0.30 mol/kg or less, and even more preferably 0.20 mol/kg or less, based on the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol.
- the content of the high molecular weight polyol is, for example, 0.40 mol/kg or more, preferably 0.45 mol/kg or more, more preferably 0.50 mol/kg or more, and even more preferably 0.55 mol/kg or more, based on the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol.
- the content of the high molecular weight polyol is, for example, 0.80 mol/kg or less, preferably 0.70 mol/kg or less, more preferably 0.65 mol/kg or less, and even more preferably 0.60 mol/kg or less, based on the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol.
- the content of the polyisocyanate component is, for example, 1.30 mol/kg or more, preferably 1.35 mol/kg or more, more preferably 1.40 mol/kg or more, and even more preferably 1.45 mol/kg or more, based on the total amount of the polyisocyanate component, high molecular weight polyol, and low molecular weight polyol.
- the content of the polyisocyanate component is, for example, 1.80 mol/kg or less, preferably 1.70 mol/kg or less, more preferably 1.65 mol/kg or less, and even more preferably 1.60 mol/kg or less, based on the total amount of the polyisocyanate component, the high molecular weight polyol, and the low molecular weight polyol.
- examples of the reaction method include bulk polymerization and solution polymerization.
- the reaction temperature is, for example, 50°C or higher.
- the reaction temperature is, for example, 250°C or lower, preferably 200°C or lower.
- the reaction time is, for example, 0.5 hours or higher, preferably 1 hour or higher.
- the reaction time is, for example, 15 hours or lower.
- the polyisocyanate component and the polyol component are reacted in the presence of a known organic solvent.
- the reaction temperature is, for example, 50°C or higher.
- the reaction temperature is, for example, 120°C or lower, preferably 100°C or lower.
- the reaction time is, for example, 0.5 hours or higher, preferably 1 hour or higher.
- the reaction time is, for example, 15 hours or lower.
- reaction conditions in the prepolymer synthesis process are appropriately set, for example, so that the isocyanate group concentration of the prepolymer composition is adjusted to the range described below.
- a prepolymer composition containing an isocyanate-terminated prepolymer is obtained as the reaction product liquid. More specifically, the prepolymer composition contains an isocyanate-terminated prepolymer, and can contain unreacted polyisocyanate components as necessary.
- the isocyanate group concentration of the prepolymer composition is 6.0% by mass or more, preferably 6.5% by mass or more, and more preferably 6.8% by mass or more.
- the isocyanate group concentration of the prepolymer composition is 8.0% by mass or less, preferably 7.5% by mass or less, and more preferably 7.2% by mass or less.
- the isocyanate group concentration can be determined by a known measurement method. Examples of the measurement method include titration using di-n-butylamine and FT-IR analysis (same below).
- the method for adjusting the isocyanate group concentration of the prepolymer composition is not particularly limited.
- the reaction is continued until the isocyanate group concentration of the reaction product liquid (prepolymer composition) reaches the above range (range of isocyanate group concentration of the prepolymer composition). Then, when the isocyanate group concentration of the reaction product liquid (prepolymer composition) reaches the above range, the reaction is stopped.
- reaction product liquid in the prepolymer synthesis process can be purified by a known method to adjust the isocyanate group concentration to the above range.
- Purification methods include, for example, distillation and extraction.
- a polyisocyanate component e.g., diphenylmethane diisocyanate
- a polyisocyanate component e.g., diphenylmethane diisocyanate
- the reaction is continued until the isocyanate group concentration in the reaction product liquid (prepolymer composition) falls within the above-mentioned range (range of isocyanate group concentration in the prepolymer composition).
- range of isocyanate group concentration in the prepolymer composition range of isocyanate group concentration in the prepolymer composition.
- the prepolymer composition may contain additives as optional components.
- additives include urethane catalysts, catalyst activity regulators, antioxidants, heat stabilizers, light stabilizers, UV absorbers, antiblocking agents, release agents, pigments, dyes, lubricants, fillers, hydrolysis inhibitors, rust inhibitors, and bluing agents.
- the amount and timing of the additives to be added are appropriately set depending on the purpose and application.
- a high molecular weight polyether polyol having a number average molecular weight in a predetermined range and a low molecular weight polyether polyol having a number average molecular weight in a predetermined range are used as raw materials.
- the isocyanate group concentration is adjusted to a predetermined range.
- the content ratio of the low molecular weight polyol with respect to the total amount of the polyisocyanate component, the high molecular weight polyol and the low molecular weight polyol is adjusted to a predetermined range.
- the above prepolymer composition can be obtained by the above-mentioned method for producing the prepolymer composition.
- the chain extender is a curing agent for the prepolymer composition.
- the chain extender is a compound having two or more active hydrogen groups in the molecule.
- the active hydrogen groups include hydroxyl groups and amino groups.
- the chain extender include low molecular weight polyols and low molecular weight polyamines.
- the chain extender preferably, low molecular weight polyols are used. By using a low molecular weight polyol, a polyurethane resin having excellent mechanical strength can be obtained.
- the low molecular weight polyol has two or more hydroxyl groups in the molecule and is a relatively low molecular weight organic compound.
- the number average molecular weight of the low molecular weight polyol is, for example, 400 or less, preferably 300 or less.
- the number average molecular weight of the low molecular weight polyol is, for example, 50 or more.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is, for example, 2 or more.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is, for example, 6 or less, preferably 4 or less, and more preferably 3 or less.
- the average number of functional groups (average number of hydroxyl groups) of the low molecular weight polyol is particularly preferably 2.
- examples of low molecular weight polyols include dihydric alcohols, trihydric alcohols, and tetrahydric or higher alcohols.
- dihydric alcohols include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, triethylene glycol, and dipropylene glycol.
- trihydric alcohols include glycerin and trimethylolpropane.
- examples of tetrahydric or higher alcohols include pentaerythritol and diglycerin. These can be used alone or in combination of two or more types.
- the low molecular weight polyol is a dihydric alcohol or a trihydric alcohol, more preferably, a dihydric alcohol, and even more preferably, 1,4-butanediol. That is, the low molecular weight polyol preferably contains 1,4-butanediol, and more preferably, consists of 1,4-butanediol.
- the chain extender may contain additives as optional components. That is, the chain extender may be a chain extender composition.
- additives include urethane catalysts, catalyst activity regulators, antioxidants, heat stabilizers, light stabilizers, UV absorbers, antiblocking agents, release agents, pigments, dyes, lubricants, fillers, hydrolysis inhibitors, rust inhibitors, and bluing agents. The amount and timing of addition of the additives are appropriately determined depending on the purpose and application.
- the polyurethane resin includes a reaction product of a prepolymer composition (first liquid) and a chain extender (second liquid).
- the polyurethane resin is preferably a reaction product of a prepolymer composition (first liquid) and a chain extender (second liquid).
- the polyurethane resin is produced, for example, by the following method. That is, first, a prepolymer composition is produced by the above-mentioned method (preparation step and prepolymer synthesis step). Next, the prepolymer composition is reacted with the above-mentioned chain extender to extend the chain of the isocyanate-terminated prepolymer (chain extension step).
- the equivalent ratio R2 (NCO/active hydrogen group) of the isocyanate group in the prepolymer composition to the active hydrogen group in the chain extender is, for example, 0.90 or more, preferably 1.00 or more, and more preferably 1.02 or more.
- the equivalent ratio R2 (NCO/active hydrogen group) of the isocyanate group in the prepolymer composition to the active hydrogen group in the chain extender is, for example, 1.33 or less, and preferably 1.25 or less.
- examples of the reaction method include the bulk polymerization and solution polymerization.
- the reaction temperature is, for example, 50°C or higher, preferably 100°C or higher.
- the reaction temperature is, for example, 250°C or lower, preferably 200°C or lower, more preferably 180°C or lower, and even more preferably 150°C or lower.
- the reaction time is, for example, 0.5 hours or higher, preferably 1 hour or higher.
- the reaction time is, for example, 24 hours or lower, preferably 20 hours or lower, and more preferably 18 hours or lower.
- the reaction temperature is, for example, 50°C or higher.
- the reaction temperature is, for example, 120°C or lower, preferably 150°C or lower.
- the reaction time is, for example, 0.5 hours or higher, preferably 1 hour or higher.
- the reaction time is, for example, 24 hours or lower.
- a known urethanization catalyst is added.
- the urethanization catalyst include amine catalysts, organometallic catalysts, and potassium salt catalysts.
- an amine catalyst is preferably used.
- the ratio of the urethanization catalyst added is appropriately set according to the purpose and application.
- the ratio of the urethanization catalyst added is, for example, more than 0 ppm, for example, 1000 ppm or less, preferably 500 ppm or less, based on the total amount of the prepolymer composition, the chain extender, and the urethanization catalyst.
- the timing of adding the urethanization catalyst is appropriately set according to the purpose and application.
- the urethanization catalyst may be added to the prepolymer composition and/or the chain extender, may be added when the prepolymer composition and the chain extender are blended, or may be added to a mixture of the prepolymer composition and the chain extender.
- the polyurethane resin may contain known additives as necessary. That is, the polyurethane resin may be a polyurethane resin composition.
- additives include urethane catalysts, catalyst activity regulators, antioxidants, heat stabilizers, light stabilizers, UV absorbers, antiblocking agents, release agents, pigments, dyes, lubricants, fillers, hydrolysis inhibitors, rust inhibitors, and bluing agents.
- the amount and timing of the additives to be added are appropriately set according to the purpose and application.
- the polyurethane resin may be heat-treated as necessary.
- the heat treatment temperature is, for example, 50°C or higher, and preferably 80°C or higher.
- the heat treatment temperature is, for example, 200°C or lower, and preferably 150°C or lower.
- the heat treatment time is, for example, 30 minutes or longer, and preferably 1 hour or longer.
- the heat treatment time is, for example, 30 hours or shorter, and preferably 20 hours or shorter.
- the polyurethane resin may be aged.
- the aging temperature is, for example, 10°C or higher, preferably 20°C or higher.
- the aging temperature is, for example, 50°C or lower, preferably 40°C or lower.
- the aging time is, for example, 1 hour or longer, preferably 10 hours or longer.
- the aging time is, for example, 50 days or shorter, preferably 30 days or shorter.
- the polyurethane resin is obtained by using the prepolymer composition, and therefore has excellent appearance and mechanical properties.
- the polyurethane resin and prepolymer composition described above are therefore suitable for use in various industrial fields where appearance and mechanical properties are required.
- industrial fields include elastic molded products, paints, coating agents, and adhesives.
- elastic molded products are used.
- the elastic molded article may be, for example, a polyurethane elastomer.
- the polyurethane elastomer may be, for example, a TPU (thermoplastic polyurethane resin) or a TSU (thermosetting polyurethane resin).
- the elastic molded article may preferably be, for example, a TSU (thermosetting polyurethane resin).
- Elastic molded products can be obtained by molding polyurethane resin using known molding methods. Examples of molding methods include cast molding, thermal compression molding, injection molding, extrusion molding, and spinning molding.
- the shapes of the molded products can be, for example, plate-like, fiber-like, strand-like, film-like, sheet-like, pipe-like, bottle-like, hollow, box-like, and button-like.
- the elastic molded product is preferably obtained by cast molding. Therefore, the elastic molded product is preferably a cast polyurethane elastomer.
- a cast polyurethane elastomer is a molded product (cast molded product) obtained by cast molding, and is an article that independently has a predetermined shape according to the purpose and use, and is distinguished from a coating agent that is applied to the substrate.
- a prepolymer composition and a chain extender are preferably mixed to prepare a polyurethane resin composition.
- the polyurethane resin composition is then degassed as necessary and fed into a preheated mold. This causes the polyurethane resin composition to be heated and cured within the mold. This results in an elastic molded product (polyurethane elastomer) molded into the desired shape.
- the polyurethane resin composition it is preferable to supply the polyurethane resin composition to a mold at a relatively low temperature.
- the mold is then heated, and the polyurethane resin composition is held in the mold at a predetermined temperature (curing temperature) for a predetermined time. This causes the polyurethane resin composition to react and cure.
- the mold temperature (initial temperature) when the polyurethane resin composition is supplied is, for example, 50°C or higher, and preferably 60°C or higher. From the viewpoint of the appearance of the elastic molded product (polyurethane elastomer), the mold temperature (initial temperature) when the polyurethane resin composition is supplied is, for example, 200°C or lower, preferably 150°C or lower, more preferably 120°C or lower, even more preferably 100°C or lower, and particularly preferably 80°C or lower.
- the mold temperature (curing temperature) during the reaction of the polyurethane resin composition is, for example, 80°C or higher, and preferably 100°C or higher.
- the reaction temperature is, for example, 250°C or lower, preferably 200°C or lower, more preferably 180°C or lower, and even more preferably 150°C or lower.
- the retention time (reaction time) of the polyurethane resin composition in the mold is, for example, 0.5 hours or more, and preferably 1 hour or more.
- the retention time (reaction time) of the polyurethane resin composition in the mold is, for example, 24 hours or less, preferably 20 hours or less, and more preferably 18 hours or less.
- elastic molded products are suitable for use in a variety of applications.
- applications of elastic molded products include transparent hard plastics, waterproofing materials, potting agents, inks, binders, films, sheets, bands, belts, shoe press belts, tubes, blades, speakers, sensors, outsoles, threads, fibers, nonwoven fabrics, cosmetics, shoe supplies, heat insulation materials, sealing materials, tape materials, sealing materials, solar power generation components, robot components, android components, wearable components, clothing supplies, sanitary products, cosmetics, furniture supplies, food packaging components, sporting goods, leisure goods, medical supplies, nursing care supplies, housing components, acoustic components, lighting components, vibration-proofing components, soundproofing components, daily necessities, miscellaneous goods, cushions, bedding, stress absorbing materials, stress relaxation materials, automotive interior materials, automotive exterior materials, railway components, aircraft components, optical components, office automation equipment components, miscellaneous surface protection materials, semiconductor sealing materials, self-repairing materials, health equipment, eyeglass lenses, toys, packing, cable sheaths, wire harness
- Tables 1 to 7 show the content ratio (mol/kg) of the polyisocyanate component, the content ratio (mol/kg) of the high molecular weight polyol, and the content ratio (mol/kg) of the low molecular weight polyol relative to the total amount of the polyisocyanate component, high molecular weight polyol, and low molecular weight polyol, respectively.
- the isocyanate group concentration of the reaction product liquid was measured using a potentiometric titration device by the n-dibutylamine method in accordance with JIS K-1556 (2006). The reaction was stopped when the isocyanate group concentration of the reaction product liquid reached the value in the table. This resulted in a prepolymer composition containing an isocyanate group-terminated prepolymer.
- Chain extension step A prepolymer composition, a chain extender (and a urethanization catalyst) were prepared according to the formulations shown in Tables 1 to 7.
- the prepolymer composition and the chain extender were heated to 60° C.
- the equivalent ratio R2 in the chain extension step indicates the equivalent ratio R2 (NCO/active hydrogen group) of the isocyanate group in the prepolymer composition to the active hydrogen group in the chain extender.
- the prepolymer composition was then mixed with a chain extender (and a urethane catalyst) to obtain a polyurethane resin composition.
- the polyurethane resin composition was then degassed under vacuum.
- the temperature of the mold (sheet-shaped, 2 mm thick) was adjusted to the initial temperature shown in Tables 1 to 7.
- the polyurethane resin composition was then poured into the mold.
- the temperature of the mold was then adjusted to the curing temperature shown in Tables 1 to 7, and the polyurethane resin composition was held within the mold. After the holding time shown in Tables 1 to 7 had elapsed, the contents of the mold were demolded. This resulted in the production of a polyurethane resin (polyurethane elastomer, elastic molded product).
- the polyurethane resin was then heat-treated in an oven at 110°C for 15 hours. After that, the polyurethane resin was aged for 7 days under constant temperature and humidity conditions of room temperature 23°C and relative humidity 55%.
- Abrasion resistance (Taber abrasion) The abrasion resistance of the polyurethane resin was evaluated by the following method. That is, the surface of the polyurethane resin was abraded using a Taber abrasion tester (manufactured by Toyo Seiki Seisakusho) and an abrasion wheel H-22 under conditions of a load of 1 kg, a rotation speed of 60 rpm and 1000 revolutions. Then, the mass difference (mg) of the polyurethane resin before and after the test was measured. The smaller the mass difference (mg), the better the abrasion resistance.
- the polyurethane resin and prepolymer composition of the present invention are suitable for use in elastic molded products, paints, coatings and adhesives.
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Abstract
Description
ポリウレタン樹脂は、プレポリマー組成物(第1液)と鎖伸長剤(第2液)との反応生成物を含んでいる。ポリウレタン樹脂は、好ましくは、プレポリマー組成物(第1液)と鎖伸長剤(第2液)との反応生成物からなる。すなわち、ポリウレタン樹脂は、好ましくは、プレポリマー組成物と鎖伸長剤との反応および硬化により得られるウレタン硬化物である。
プレポリマー組成物(第1液)は、必須成分として、イソシアネート基末端プレポリマーを含有する。イソシアネート基末端プレポリマーは、ポリイソシアネート成分と、ポリオール成分との反応生成物を含有する。好ましくは、イソシアネート基末端プレポリマーは、ポリイソシアネート成分と、ポリオール成分との反応生成物からなる。
ポリイソシアネート成分は、必須成分として、ジフェニルメタンジイソシアネート(MDI)を、含有する。ジフェニルメタンジイソシアネートとしては、例えば、ジフェニルメタンジイソシアネート単量体およびジフェニルメタンジイソシアネート誘導体が挙げられる。
ポリオール成分は、ポリイソシアネート成分と反応し、イソシアネート基末端プレポリマーを合成する。ポリオール成分は、高分子量ポリオールおよび低分子量ポリオールを含有する。ポリオール成分は、好ましくは、高分子量ポリオールおよび低分子量ポリオールからなる。
また、高分子量ポリオールの含有割合は、ポリオール成分の総量(高分子量ポリオールおよび低分子量ポリオールの総量)に対して、例えば、95モル%以下、好ましくは、93モル%以下、より好ましくは、90モル%以下、さらに好ましくは、88モル%以下である。
プレポリマー組成物は、例えば、上記のポリイソシアネート成分と上記のポリオール成分とを反応させることによって、反応生成液として得られる。
そして、反応生成液(プレポリマー組成物)のイソシアネート基濃度が上記の範囲に至ったときに、反応を停止させる。
上記のプレポリマー組成物では、原料として、所定範囲の数平均分子量を有する高分子量ポリエーテルポリオールと、所定範囲の数平均分子量を有する低分子量ポリエーテルポリオールとが、使用される。また、上記のプレポリマー組成物において、イソシアネート基濃度は、所定範囲に調整される。さらに、上記のプレポリマー組成物において、ポリイソシアネート成分、高分子量ポリオールおよび低分子量ポリオールの総量に対して、低分子量ポリオールの含有割合が、所定範囲に調整される。これらの条件が組み合わされることによって、上記のプレポリマー組成物は、優れた外観および機械物性を有するポリウレタン樹脂を製造できる。
鎖伸長剤は、プレポリマー組成物に対する硬化剤である。鎖伸長剤は、分子中に2つ以上の活性水素基を有する化合物である。活性水素基としては、例えば、水酸基およびアミノ基が挙げられる。鎖伸長剤としては、例えば、低分子量ポリオールおよび低分子量ポリアミンが挙げられる。鎖伸長剤として、好ましくは、低分子量ポリオールが挙げられる。
低分子量ポリオールを用いることにより、優れた機械強度を有するポリウレタン樹脂が得られる。
添加剤の添加量および添加タイミングは、目的および用途に応じて、適宜設定される。
ポリウレタン樹脂は、上記したように、プレポリマー組成物(第1液)と鎖伸長剤(第2液)との反応生成物を含む。ポリウレタン樹脂は、好ましくは、プレポリマー組成物(第1液)と鎖伸長剤(第2液)との反応生成物からなる。
上記のポリウレタン樹脂は、上記のプレポリマー組成物を使用して得られるため、優れた外観および機械物性を有する。
弾性成形品としては、例えば、ポリウレタンエラストマーが挙げられる。ポリウレタンエラストマーとしては、TPU(熱可塑性ポリウレタン樹脂)およびTSU(熱硬化性ポリウレタン樹脂)が挙げられる。弾性成形品として、好ましくは、TSU(熱硬化性ポリウレタン樹脂)が挙げられる。
(1)ポリイソシアネート成分
MDI;4,4’-ジフェニルメタンジイソシアネート、商品名;コスモネートPH、三井化学社製
(2)ポリオール成分
・高分子量ポリエーテルポリオール
PTMEG700;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)700
PTMEG800;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)800
PTMEG1000;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)1000
PTMEG1200;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)1200
PTMEG1300;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)1300
・低分子量ポリエーテルポリオール
PTMEG150;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)150
PTMEG250;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)250
PTMEG350;ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)350
(3)鎖伸長剤
1,4-BD;1,4-ブタンジオール
(4)ウレタン化触媒
DABCO 33LV;アミン触媒、エボニック社製
実施例1~14および比較例1~12
(1)準備工程
表1~表7に記載の処方で、ポリイソシアネート成分と、ポリオール成分(高分子量ポリオールおよび低分子量ポリオール)とを、準備した。
表1~表7に記載の処方および条件で、ポリイソシアネート成分およびポリオール成分を、窒素雰囲気下において、80℃で反応させた。なお、表1~表7において、プレポリマー合成工程の当量比R1は、ポリオール成分中の水酸基に対する、ポリイソシアネート成分中のイソシアネート基の当量比R1(NCO/OH)を示す。
表1~表7に記載の処方で、プレポリマー組成物と鎖伸長剤と(ウレタン化触媒と)を準備した。プレポリマー組成物と鎖伸長剤とを60℃に加温した。なお、表1~表7において、鎖伸長工程の当量比R2は、鎖伸長剤中の活性水素基に対する、プレポリマー組成物中のイソシアネート基の当量比R2(NCO/活性水素基)を示す。
(1)A硬度
ポリウレタン樹脂のショアA硬度を、JIS K 7312(1996年)に準拠して測定した。
ポリウレタン樹脂の引張特性を、万能引張試験機(インテスコ社製 205N)により、JIS K 7312(1996年)に準拠して測定した。すなわち、ポリウレタン樹脂を切断し、3号ダンベル試験片を得た。そして、引張速度500mm/分の条件で、100%モジュラス(MPa)、300%モジュラス(MPa)、引張強度(MPa)および破断伸び(%)を測定した。
ポリウレタン樹脂の耐摩耗性を、以下の方法で評価した。すなわち、ポリウレタン樹脂の表面を、テーバー摩耗試験機(東洋精機製作所製)および摩耗輪H-22を用いて、荷重1kg、回転速度60rpmおよび1000回転の条件で摩耗した。そして、試験前後のポリウレタン樹脂の質量差(mg)を測定した。なお、質量差(mg)が少ないものほど、耐摩耗性が良好である。
2mm厚みのシートから100cm2の小片を切り出した。小片の外観を、以下の評価5~1の5段階で評価した。
評価5:0.1mm2以上の白点が3個未満存在する。
評価4:0.1mm2以上の白点が3個以上存在する。
評価3:0.1mm2以上の白点が10個以上存在する。
評価2:0.1mm2以上の白点が20個以上存在する。
評価1:0.1mm2以上の白点が50個以上存在する。
Claims (4)
- イソシアネート基末端プレポリマーを含有するプレポリマー組成物であって、
前記イソシアネート基末端プレポリマーが、ポリイソシアネート成分およびポリオール成分の反応生成物を含有し、
前記ポリイソシアネート成分は、ジフェニルメタンジイソシアネートを含有し、
前記ポリオール成分は、高分子量ポリオールおよび低分子量ポリオールを含有し、
前記高分子量ポリオールは、数平均分子量700超過1300未満の高分子量ポリエーテルポリオールを含有し、
前記低分子量ポリオールは、数平均分子量150超過350未満の低分子量ポリエーテルポリオールを含有し、
前記プレポリマー組成物のイソシアネート基濃度は、6.0質量%以上8.0質量%以下であり、
前記ポリイソシアネート成分、前記高分子量ポリオールおよび前記低分子量ポリオールの総量に対して、前記低分子量ポリオールの含有割合が、0.05モル/kgを超過し、0.40モル/kg未満である、プレポリマー組成物。 - プレポリマー組成物と鎖伸長剤との反応生成物を含有し、
前記プレポリマー組成物は、イソシアネート基末端プレポリマーを含有し、
前記イソシアネート基末端プレポリマーが、ポリイソシアネート成分およびポリオール成分の反応生成物を含有し、
前記ポリイソシアネート成分は、ジフェニルメタンジイソシアネートを含有し、
前記ポリオール成分は、高分子量ポリオールおよび低分子量ポリオールを含有し、
前記高分子量ポリオールは、数平均分子量700超過1300未満の高分子量ポリエーテルポリオールを含有し、
前記低分子量ポリオールは、数平均分子量150超過350未満の低分子量ポリエーテルポリオールを含有し、
前記プレポリマー組成物のイソシアネート基濃度は、6.0質量%以上8.0質量%以下であり、
前記ポリイソシアネート成分、前記高分子量ポリオールおよび前記低分子量ポリオールの総量に対して、前記低分子量ポリオールの含有割合が、0.05モル/kgを超過し、0.40モル/kg未満である、ポリウレタン樹脂。 - 請求項2に記載のポリウレタン樹脂を含む、弾性成形品。
- イソシアネート基末端プレポリマーを含有するプレポリマー組成物を製造する方法であって、
ポリイソシアネート成分とポリオール成分とを準備する工程と、
前記ポリイソシアネート成分と前記ポリオール成分とを反応させ、イソシアネート基末端プレポリマーを合成する工程とを備え、
前記ポリイソシアネート成分は、ジフェニルメタンジイソシアネートを含有し、
前記ポリオール成分は、高分子量ポリオールおよび低分子量ポリオールを含有し、
前記高分子量ポリオールは、数平均分子量700超過1300未満の高分子量ポリエーテルポリオールを含有し、
前記低分子量ポリオールは、数平均分子量150超過350未満の低分子量ポリエーテルポリオールを含有し、
前記プレポリマー組成物のイソシアネート基濃度は、6.0質量%以上8.0質量%以下であり、
前記ポリイソシアネート成分、前記高分子量ポリオールおよび前記低分子量ポリオールの総量に対して、前記低分子量ポリオールの含有割合が、0.05モル/kgを超過し、0.40モル/kg未満である、プレポリマー組成物の製造方法。
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| CN202480013723.7A CN120731234A (zh) | 2023-03-07 | 2024-02-29 | 预聚物组合物、聚氨酯树脂、弹性成型品及预聚物组合物的制造方法 |
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| JP2023034426A JP7367294B1 (ja) | 2023-03-07 | 2023-03-07 | プレポリマー組成物、ポリウレタン樹脂、弾性成形品およびプレポリマー組成物の製造方法 |
| JP2023-034426 | 2023-03-07 |
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| JPH08301970A (ja) * | 1994-10-22 | 1996-11-19 | Cheil Synthetics Inc | 粘度安定性に秀れたポリウレタン系弾性重合体の製造方法 |
| JPH0971624A (ja) * | 1995-07-06 | 1997-03-18 | Nippon Polyurethane Ind Co Ltd | 二液発泡ポリウレタン樹脂用組成物、及びこれを用いた成形物の製造方法 |
| JPH09235347A (ja) * | 1995-12-28 | 1997-09-09 | Nippon Polyurethane Ind Co Ltd | ポリイソシアヌレートフォーム用組成物、及び該組成物を用いたポリイソシアヌレートフォームの製造方法 |
| JPH10212333A (ja) * | 1997-01-24 | 1998-08-11 | Air Prod And Chem Inc | 改善された動力学的特性を有するエラストマーを製造するためのポリウレタンプレポリマー |
| JP2016204449A (ja) * | 2015-04-17 | 2016-12-08 | 東洋インキScホールディングス株式会社 | 接着剤組成物およびそれを用いた積層体 |
| JP2018039321A (ja) * | 2016-09-06 | 2018-03-15 | 株式会社イノアックコーポレーション | 車両用フロアサイレンサ、および車両用フロアサイレンサ製造方法 |
| JP2021185219A (ja) * | 2020-05-23 | 2021-12-09 | 東邦化学工業株式会社 | 親水性ウレタン系止水剤 |
| JP2022022199A (ja) * | 2020-07-22 | 2022-02-03 | 東邦化学工業株式会社 | 親水性ウレタン系止水剤 |
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- 2023-03-07 JP JP2023034426A patent/JP7367294B1/ja active Active
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2024
- 2024-02-29 WO PCT/JP2024/007648 patent/WO2024185657A1/ja not_active Ceased
- 2024-02-29 CN CN202480013723.7A patent/CN120731234A/zh active Pending
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| JPH0892346A (ja) * | 1994-07-27 | 1996-04-09 | Nippon Polyurethane Ind Co Ltd | 硬質フォーム用ポリイソシアネート組成物、及び該組成物を用いた硬質ポリウレタンフォームの製造方法 |
| JPH08301970A (ja) * | 1994-10-22 | 1996-11-19 | Cheil Synthetics Inc | 粘度安定性に秀れたポリウレタン系弾性重合体の製造方法 |
| JPH0971624A (ja) * | 1995-07-06 | 1997-03-18 | Nippon Polyurethane Ind Co Ltd | 二液発泡ポリウレタン樹脂用組成物、及びこれを用いた成形物の製造方法 |
| JPH09235347A (ja) * | 1995-12-28 | 1997-09-09 | Nippon Polyurethane Ind Co Ltd | ポリイソシアヌレートフォーム用組成物、及び該組成物を用いたポリイソシアヌレートフォームの製造方法 |
| JPH10212333A (ja) * | 1997-01-24 | 1998-08-11 | Air Prod And Chem Inc | 改善された動力学的特性を有するエラストマーを製造するためのポリウレタンプレポリマー |
| JP2016204449A (ja) * | 2015-04-17 | 2016-12-08 | 東洋インキScホールディングス株式会社 | 接着剤組成物およびそれを用いた積層体 |
| JP2018039321A (ja) * | 2016-09-06 | 2018-03-15 | 株式会社イノアックコーポレーション | 車両用フロアサイレンサ、および車両用フロアサイレンサ製造方法 |
| JP2021185219A (ja) * | 2020-05-23 | 2021-12-09 | 東邦化学工業株式会社 | 親水性ウレタン系止水剤 |
| JP2022022199A (ja) * | 2020-07-22 | 2022-02-03 | 東邦化学工業株式会社 | 親水性ウレタン系止水剤 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120731234A (zh) | 2025-09-30 |
| JP7367294B1 (ja) | 2023-10-24 |
| JP2024126198A (ja) | 2024-09-20 |
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