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公开(公告)号：US20200055974A1
公开(公告)日：2020-02-20
申请号：US16347072
申请日：2017-11-06
发明人： Toru TAKAHASHI , Daigo NAKAYA , Kensuke OSHIMA , Daisuke SUNAGA
IPC分类号： C08G2/24
摘要： The present invention addresses the problem of providing a method for producing an oxymethylene copolymer, which is capable of producing an oxymethylene copolymer having a high molecular weight with high yield and high economic efficiency. This problem is able to be solved by a method for producing an oxymethylene copolymer, in which a copolymer starting material containing a trioxane and a comonomer is subjected to a polymerization reaction in the presence of a polymerization initiator that contains an acidic compound (A), and wherein: the copolymer starting material contains a basic compound (B); an acidic compound (C) that is different from the acidic compound (A) is added into the copolymer starting material before performing the polymerization reaction, thereby causing a reaction between the basic compound (B) and the acidic compound (C) in advance; and the polymerization reaction is carried out by means of melt polymerization.
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公开(公告)号：US20240327608A1
公开(公告)日：2024-10-03
申请号：US18571334
申请日：2022-06-29
发明人： Kiyonori MICHIBA , Daisuke SUNAGA
CPC分类号： C08K5/098 , C08J3/201 , C08K3/11 , C08K5/11 , C08K5/1535 , B22F3/225 , C08J2359/00
摘要： A polyacetal resin composition includes: 100 parts by weight of a polyacetal resin (A), 0.2 to 10.0 parts by weight of a fatty acid metal salt (B), and 0.2 to 10.0 parts by weight of a fatty acid ester compound (C), wherein the fatty acid metal salt (B) is fatty acid zinc, fatty acid magnesium, or a combination thereof, and the fatty acid ester compound (C) is a compound having 3 or more ester bonds in a single molecule thereof.
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公开(公告)号：US20230151203A1
公开(公告)日：2023-05-18
申请号：US17801660
申请日：2021-03-03
发明人： Daisuke SUNAGA
CPC分类号： C08L59/00 , B29C45/0001 , B29C48/022 , C08K3/26 , C08K5/10 , C08K5/20 , C08L23/06 , B29K2059/00 , C08K2003/267 , C08L2207/066
摘要： The present invention provides a polyacetal resin composition, which comprises a polyacetal resin, and which further comprises the following (A), (B) and (C), with respect to 100 parts by weight of the polyacetal resin: (A) 0.05 to 5.5 parts by weight of a low-density polyethylene having a melt flow rate of 1.0 to 50 g/10 minutes (190° C., 2.16 kg), (B) 0.05 to 2.0 parts by weight of a fatty acid compound (excluding calcium stearate), and (C) 0.001 to 1.0 part by weight of a layered double hydroxide represented by the following general formula (1): [(M2+)x(M3+)y(OH)2(x+y)](An·)x/u·z(H2O) (1) (wherein, in the general formula (1), M2+ represents a divalent metal ion, M3+ represents a trivalent metal ion, An- represents an n-valent anion, wherein one or more of the anions are contained in the layered double hydroxide, x represents a number in the range of 0
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公开(公告)号：US20220356290A1
公开(公告)日：2022-11-10
申请号：US17635192
申请日：2021-08-06
发明人： Mika NAKASHIMA , Daisuke SUNAGA
IPC分类号： C08G2/30 , C08K5/3492 , C08K5/13 , C08K5/17 , B29C48/00
摘要： The present invention provides a method for producing an oxymethylene copolymer resin composition, comprising: adding to an oxymethylene copolymer (A), an Mn micromole of an amine-substituted triazine compound (B) per gram of the oxymethylene copolymer (A), an Mc micromole of a choline hydroxide (C) per gram of the oxymethylene copolymer (A), and 0.05 to 1.1 parts by weight of an antioxidant (D) with respect to 100 parts by weight of the oxymethylene copolymer (A), and melt kneading a mixture of the oxymethylene copolymer (A), amine-substituted triazine compound (B), the choline hydroxide (C), and the antioxidant (D), wherein Mn (μmol/g-POM) and Mc (μmol/g-POM) satisfy: 6.5
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公开(公告)号：US20220056259A1
公开(公告)日：2022-02-24
申请号：US17293566
申请日：2020-06-10
发明人： Takuya OKADA , Daisuke SUNAGA
摘要： It has been desired to develop a method for producing an oxymethylene polymer, by which an oxymethylene polymer having a high polymerization degree can be produced with high efficiency while suppressing increase in the amount of generation of an odor. Further, it has been desired to develop an oxymethylene polymer resin composition, wherein generation of an odor at the time of molding or after molded to obtain a molded body is suppressed. The present invention provides a method for producing an oxymethylene polymer, wherein the oxymethylene polymer is produced by polymerizing a cyclic oligomer of formaldehyde, and wherein a boron trifluoride compound and an aryl fluoride boron compound are used as polymerization catalysts. The present invention also provides an oxymethylene polymer resin composition containing an oxymethylene polymer and a derivative of an aryl fluoride boron compound.
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公开(公告)号：US20190276659A1
公开(公告)日：2019-09-12
申请号：US16302404
申请日：2017-05-19
发明人： Daisuke SUNAGA
IPC分类号： C08L59/00 , C08K5/00 , C08K5/20 , C08K5/134 , C08K5/3492
摘要： The purpose of the present invention is to provide: a polyacetal resin composition which is excellent in terms of impact resistance, thermal stability, and releasability; and a process for producing the polyacetal resin composition. The polyacetal resin composition comprises 100 parts by mass of a polyacetal resin (A) in which the molecular chain has neither a crosslink nor a branch therein, 0.01-10.0 parts by mass of an antioxidant (B), 0.01-5.0 parts by mass of a nitrogenous compound (C), and 0.05-1.0 parts by mass of a fatty acid amide (D), and has a melt index, as measured in accordance with ISO 1133, of 0.5-1.5 g/10 min. A process for producing the polyacetal resin compositions is also provided.
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公开(公告)号：US20180179670A1
公开(公告)日：2018-06-28
申请号：US15759371
申请日：2016-09-07
发明人： Akira ITO , Daisuke SUNAGA , Kohsuke TOGASHI
CPC分类号： D01F6/66 , D01F6/78 , D01F8/16 , D03D15/00 , D04B1/16 , D06M15/39 , D06M2101/20 , D06M2101/24 , D06M2101/32 , D10B2401/02 , D10B2501/00 , D10B2503/06 , D10B2505/12
摘要： A cloth containing a fiber having on a surface a polyacetal copolymer containing a prescribed amount of oxyalkylene unit(s), wherein the cloth exhibits a qmax value of at least 0.2 W/cm2, when the cloth is brought into contact with a heat storing plate of 40° C. under a contact pressure of 0.098 N/cm2 in an environment at a temperature of 20° C. and at a relative humidity of 65%, is superior in contact cold sensation, colorfastness, quick drying property and gloss.
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公开(公告)号：US20240218153A1
公开(公告)日：2024-07-04
申请号：US18272445
申请日：2021-11-22
发明人： Kiyonori MICHIBA , Daisuke SUNAGA
CPC分类号： C08K5/098 , C08J3/201 , C08K3/08 , B22F3/225 , C08J2359/00
摘要： The present invention provides a polyacetal resin composition that is used by being kneaded with metal powders, said polyacetal resin composition comprising 100 parts by weight of a polyacetal resin (A) and 0.15 to 10.0 parts by weight of a fatty acid metal salt (B), wherein the fatty acid metal salt (B) is fatty acid zinc, fatty acid magnesium, or a combination thereof.
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公开(公告)号：US20230250211A1
公开(公告)日：2023-08-10
申请号：US18137160
申请日：2023-04-20
发明人： Toru TAKAHASHI , Daigo NAKAYA , Kensuke OSHIMA , Daisuke SUNAGA
IPC分类号： C08G2/24
CPC分类号： C08G2/24
摘要： A method for producing an oxymethylene copolymer, in which a copolymer starting material containing a trioxane and a comonomer is subjected to a polymerization reaction in the presence of a polymerization initiator that contains an acidic compound (A), and where: the copolymer starting material contains a basic compound (B); an acidic compound (C) that is different from the acidic compound (A) is added into the copolymer starting material before performing the polymerization reaction, thereby causing a reaction between the basic compound (B) and the acidic compound (C) in advance; and the polymerization reaction is carried out by means of melt polymerization.
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公开(公告)号：US20210388534A1
公开(公告)日：2021-12-16
申请号：US17426283
申请日：2020-11-25
发明人： Daisuke SUNAGA , Sunao MIKAMI
摘要： Polyacetal fibers having excellent spinning stability and uniform appearance and production methods thereof have been awaited. According to the invention, a polyacetal fiber, comprising 0.05 to 1.3 parts by mass of an inorganic filler with respect to 100 parts by mass of a polyacetal resin, in which the inorganic filler has a primary average particle size of more than 0.5 μm and 10 μm or less, and the polyacetal fiber has a melt flow index of 15 to 45 g/10 min, is provided.
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