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公开(公告)号：EP4435052A1
公开(公告)日：2024-09-25
申请号：EP22895380.8
申请日：2022-10-26
摘要： An object is to provide a polyether nitrile molding material having high flowability during melt molding. As a solution, a polyether nitrile molding material having a melt flow rate (MFR) in the range of 2 to 50 g/10 min as measured at 390°C under a load of 5000 g in accordance with ISO 1133 is provided.
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公开(公告)号：EP4435035A1
公开(公告)日：2024-09-25
申请号：EP22895385.7
申请日：2022-10-26
IPC分类号： C08G65/40
CPC分类号： C08G65/40
摘要： A method for producing a polyether nitrile having a high molecular weight at a practical polymerization rate is provided. The method for producing a polyether nitrile includes allowing an aromatic dihydroxy compound composition (I) and a dihalobenzonitrile compound composition (II) to undergo a polycondensation reaction in the presence of a basic compound. In the method, the aromatic dihydroxy compound composition (I) includes an aromatic dihydroxy compound (I-a) and an aromatic monohydroxy compound (I-b), and contains (I-a) in an amount ranging from 99.0 to 99.995 mol% and (I-b) in an amount ranging from 1 to 0.005 mol% relative to a total amount of (I-a) and (I-b), and the dihalobenzonitrile compound composition (II) includes a dihalobenzonitrile compound (II-a) and a monohalobenzonitrile compound (II-b), and contains (II-a) in an amount ranging from 99.0 to 99.995 mol% and (II-b) in an amount ranging from 1 to 0.005 mol% relative to a total amount of (II-a) and (II-b).
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公开(公告)号：EP4435034A1
公开(公告)日：2024-09-25
申请号：EP22895384.0
申请日：2022-10-26
IPC分类号： C08G65/40
CPC分类号： C08G65/40
摘要： An object is to provide a method for producing a polyether nitrile having stable melt flowability, in which the melt flowability during molding is less likely to vary and decrease when the polyether nitrile is repeatedly produced. As a solution, a method for producing a polyether nitrile obtained by allowing an aromatic dihydroxy compound (I) and a dihalobenzonitrile compound (II) to undergo a polycondensation reaction in the presence of a basic compound (III) is provided. The method includes a step (Step 1) of feeding a reaction raw material composed of the aromatic dihydroxy compound (I), the dihalobenzonitrile compound (II), and the basic compound (III) and a reaction solvent to a polycondensation reactor to perform a polycondensation reaction, a step (Step 2) of taking out a polymer obtained by the polycondensation reaction from the polycondensation reactor, and a step (Step 3) of removing the polymer remaining in the polycondensation reactor and feeding the reaction solvent and the reaction raw material anew to the polycondensation reactor to perform a new polycondensation reaction.
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公开(公告)号：EP4435033A1
公开(公告)日：2024-09-25
申请号：EP22895383.2
申请日：2022-10-26
IPC分类号： C08G65/40
CPC分类号： C08G65/40
摘要： An object is to provide a method for producing a polyether nitrile having high heat resistance and excellent in mechanical properties such that the polyether nitrile has a high molecular weight and high flowability. As a solution, provided is a method for producing a polyether nitrile, in which in producing a polyether nitrile by allowing an aromatic dihydroxy compound (I) and a dihalobenzonitrile compound (II) to undergo a polycondensation reaction, the reaction is continued to a region where a polymer reduced viscosity of a parachlorophenol solution at 40°C decreases after exceeding 1 as the polycondensation proceeds and reaching a maximum.
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