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1. 发明授权

US10738166B2 Method for producing polyoxymethylene resin composition 有权
公开(公告)号：US10738166B2
公开(公告)日：2020-08-11
申请号：US15027084
申请日：2014-09-09
申请人： Polyplastics Co., Ltd.
发明人： Tomohiro Monma , Kazufumi Watanabe , Akihide Shimoda
IPC分类号： C08K5/098 , C08J3/20 , C08L23/08 , C08L59/04 , C08J3/00 , C08K5/13
摘要： A polyoxymethylene resin composition from which formaldehyde is generated in a reduced amount upon molding, without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer. A hindered phenol-type antioxidant agent and an ethylene-(methacrylic acid) copolymer resin or an ethylene-(acrylic acid) copolymer resin or a salt thereof are melted and kneaded together to produce a polyoxymethylene resin composition without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer for which a polymerization catalyst is deactivated after the completion of copolymerization, and in which the unstable terminal group is not yet stabilized. When the polyoxymethylene resin composition is extrusion-molded, the discoloration of a molded product or the deterioration in properties of the molded product can be prevented for a long period of time. The resulting polyoxymethylene resin composition is suitable for forming an extrusion-molded article.

2. 发明授权

US09969875B2 Polyacetal resin composition and sliding member 有权
公开(公告)号：US09969875B2
公开(公告)日：2018-05-15
申请号：US15548994
申请日：2015-11-30
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda , Hirokazu Katsuchi
IPC分类号： C08K3/26 , C08L59/00 , C08K5/101 , C08L83/04 , C08K5/16 , C08K7/08 , C08L51/04 , C08K5/13
CPC分类号： C08L59/00 , C08K3/26 , C08K5/101 , C08K5/103 , C08K5/13 , C08K5/16 , C08K5/34922 , C08K7/08 , C08K2003/265 , C08L51/04 , C08L51/06 , C08L59/04 , C08L83/04 , F16C31/02 , F16C33/201
摘要： A polyacetal resin composition which not only is highly inhibited from making creaking sounds but also has satisfactory performances with respect to other properties. The polyacetal resin composition includes 100 parts by weight of a polyacetal resin, 0.01-1 part by weight of a hindered phenolic antioxidant, 0.01-1 part by weight of a nitrogenous compound, 0.1-1 part by weight of a graft copolymer, 0.1-1 part by weight of a fatty acid ester, 0.5-5 parts by weight of a silicone oil, and 0.1-1 part by weight of calcium carbonate. The nitrogenous compound may be an aminotriazine compound, the graft copolymer includes an olefin-based polymer as the main chain and a vinyl-based polymer as side chains, the fatty acid ester includes a C12-32 fatty acid and a C2-30 mono- or polyhydric alcohol, and the calcium carbonate has an average particle diameter of 1 μm or smaller.

3. 发明授权

US10683413B2 Polyacetal resin composition and sliding member 有权
公开(公告)号：US10683413B2
公开(公告)日：2020-06-16
申请号：US15510381
申请日：2015-06-11
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda
IPC分类号： C08L59/00 , C08L71/02 , F16C33/20 , C08L23/26 , C08L23/02 , C08L51/06 , C08L59/04 , C08K3/26
摘要： A polyoxymethylene (POM) resin composition which is used for a resin molded article having an excellent sliding characteristic and wear resistance property and also having an excellent surface property and peeling resistance property. This POM resin composition contains: (A) 100 parts by mass of a POM resin; (B) 0.01-1 parts by mass of a hindered phenolic antioxidant; (C) 0.05-1 parts by mass inclusive of a nitrogen-containing compound; (D) 0.5-10 parts by mass of a modified olefin polymer which is an olefin polymer that has been modified by an unsaturated carboxylic acid or the like; (E) 0.01-5 parts by mass of an alkylene glycol polymer that has a primary or secondary amino group and a number average molecular weight of 400-500,000; (F) 0.1-20 parts by mass of calcium carbonate which has a BET specific surface area of 15 m2/g or less, has a mean particle size of 50-200 nm or less, is surface-untreated, and is substantially cubic; (G) 0.1-10 parts by mass of a partial ester of a divalent to tetravalent alcohol; and (H) 0.1-10 parts by mass of an α-olefin oligomer.

4. 发明授权

US09920183B2 Polyacetal resin composition and fuel contactor provided with molded article of the polyacetal resin composition 有权
公开(公告)号：US09920183B2
公开(公告)日：2018-03-20
申请号：US15310352
申请日：2015-03-12
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda , Satomi Nakada
IPC分类号： C08K5/17 , C08K5/134 , C08K3/22
CPC分类号： C08K5/17 , C08K3/22 , C08K5/1345 , C08K2003/222 , C08K2003/2296 , C08L59/04 , C08L71/02
摘要： A polyacetal resin composition which, when formed into a molded article, minimizes degradation caused by contact with a fuel. This resin composition contains 100 parts by weight of a polyacetal copolymer resin, 0.1-1.0 parts by weight of a hindered phenol-based antioxidant, 0.1-2.0 parts by weight of a divalent metal oxide, and 0.5-3.0 parts by weight of an alkylene oxide adduct of an alkylamine and/or an alkylene oxide adduct of an alkylene diamine. Component contains magnesium oxide and/or zinc oxide, and component is one or more of general formulae (1) to (3). In these general formulae, X represents (C2H4O)m(C3H6O)nH, and m and n are each an integer of 0 or higher. In addition, R1 is an alkyl group having 12-18 carbon atoms, and R2 is an alkylene group having 2 or 3 carbon atoms.

5. 发明授权

US09249279B2 Fuel resistant resin molded body 有权
标题翻译：耐燃树脂成型体
公开(公告)号：US09249279B2
公开(公告)日：2016-02-02
申请号：US14360919
申请日：2012-10-01
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda
IPC分类号： C08K5/34 , C08G18/80 , C08L61/02 , C08K5/3492 , C08K5/098 , C08L59/00 , C08L59/04 , B29C47/00 , B29K59/00
CPC分类号： C08K5/34924 , B29C47/0004 , B29C47/0054 , B29K2059/00 , B29K2995/0068 , C08K5/098 , C08L59/00 , C08L59/04
摘要： A polyacetal resin composition, contains a polyacetal resin, a hindered phenol antioxidant represented by a specific general formula and a fatty acid calcium salt, which can be molded. The content of the hindered phenol antioxidant in the polyacetal resin composition is from 0.05 part by mass to 1.0 part by mass (inclusive) relative to 100 parts by mass of the polyacetal resin, and the content of the fatty acid calcium salt in the polyacetal resin composition is from 0.01 part by mass to 2.0 parts by mass (inclusive) relative to 100 parts by mass of the polyacetal resin.
摘要翻译：聚缩醛树脂组合物含有聚缩醛树脂，可以模塑的特定通式代表的受阻酚抗氧化剂和脂肪酸钙盐。聚缩醛树脂组合物中的受阻酚抗氧化剂的含量相对于聚缩醛树脂100质量份为0.05质量份〜1.0质量份，聚缩醛树脂中的脂肪酸钙盐的含量组合物相对于100质量份聚缩醛树脂为0.01质量份〜2.0质量份（以下）。

6. 发明授权

US10072147B2 Sulfur-containing fuel contact body provided with molded article including polyacetal resin composition having increased acid resistance 有权
公开(公告)号：US10072147B2
公开(公告)日：2018-09-11
申请号：US15149952
申请日：2016-05-09
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda , Satomi Nakada , Yasumitsu Miyamoto , Hidemi Kondo
IPC分类号： C08K3/22 , C08K5/053 , C08L59/00 , C08L59/04 , C08K5/103 , C08K5/134 , C08J7/14
CPC分类号： C08L59/04 , C08J7/14 , C08J2359/02 , C08K3/22 , C08K5/103 , C08K5/134 , C08K5/1345 , C08K2003/222 , C08L71/02 , C08L2201/08 , F02M2200/9015
摘要： A polyacetal resin composition makes it possible, when formed into a molded article, to minimize deterioration during contact with sulfur-containing fuel or an acidic detergent. The polyacetal resin composition contains (A) 100 parts by weight of polyacetal resin, (B) 0.1-1.0 parts by weight of hindered phenolic antioxidant, (C) 0.1-2.0 parts by weight of alkaline earth metal oxide, (D) 0.5-3.0 parts by weight of polyalkylene glycol, and (E) 0.01-1.0 parts by weight of polyvalent fatty acid full ester. This polyacetal resin composition minimizes reductions in the weight of a molded article even after the molded article has been immersed in sulfur-containing fuel.

7. 发明授权

US09834669B1 Method for producing polyacetal resin composition 有权
公开(公告)号：US09834669B1
公开(公告)日：2017-12-05
申请号：US15538008
申请日：2015-11-09
申请人： Polyplastics Co., Ltd.
发明人： Tadahiro Horiguchi , Akihide Shimoda
IPC分类号： C08G63/02 , C08L59/04
CPC分类号： C08L59/04 , C08G2/20 , C08L2205/025
摘要： A polyacetal resin composition which is suppressed low in formaldehyde generation, while having high stiffness and high toughness. The resin is produced by a method including blending from 0.1 part by weight to 2 parts by weight (inclusive) of a polyacetal copolymer having a branched or crosslinked structure, which is a copolymer of a trioxane, a compound having from 3 to 4 (inclusive) cyclic ether units in each molecule and a compound having one cyclic ether unit in each molecule, per 100 parts by weight of a linear polyacetal copolymer which contains an oxymethylene unit as a main constituent, while containing, as a comonomer unit, an oxyalkylene unit at a ratio of from 0.4% by mole to 0.9% by mole (inclusive) relative to the constituents of the linear polyacetal copolymer, the linear polyacetal copolymer being obtained by copolymerization wherein a heteropolyacid or the like is used as a polymerization catalyst.

8. 发明申请

US20160237221A1 METHOD FOR PRODUCING POLYOXYMETHYLENE RESIN COMPOSITION 审中-公开
标题翻译：生产聚甲基乙烯树脂组合物的方法
公开(公告)号：US20160237221A1
公开(公告)日：2016-08-18
申请号：US15027084
申请日：2014-09-09
申请人： POLYPLASTICS CO., LTD.
发明人： Tomohiro MONMA , Kazufumi WATANABE , Akihide Shimoda
IPC分类号： C08J3/20 , C08J3/00
摘要： A polyoxymethylene resin composition from which formaldehyde is generated in a reduced amount upon molding, without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer. A hindered phenol-type antioxidant agent and an ethylene-(methacrylic acid) copolymer resin or an ethylene-(acrylic acid) copolymer resin or a salt thereof are melted and kneaded together to produce a polyoxymethylene resin composition without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer for which a polymerization catalyst is deactivated after the completion of copolymerization and in which the unstable terminal group is not yet stabilized. When the polyoxymethylene resin composition is extrusion-molded, the discoloration of a molded product or the deterioration in properties of the molded product can be prevented for a long period of time. The resulting polyoxymethylene resin composition is suitable for forming an extrusion-molded article.
摘要翻译：一种聚甲醛树脂组合物，其在成型时由甲醛产生量减少，而不进行用于稳定粗甲醛共聚物中不稳定末端基团的稳定化处理。将受阻酚型抗氧化剂和乙烯 - （甲基丙烯酸）共聚物树脂或乙烯 - （丙烯酸）共聚物树脂或其盐熔融并捏合在一起以制备聚甲醛树脂组合物，而不进行用于稳定化的稳定化处理粗制甲醛共聚物中的不稳定末端基团，其中聚合催化剂在共聚完成后失活，并且其中不稳定末端基团尚未稳定。当聚甲醛树脂组合物被挤出成型时，可以长时间地防止模制品的变色或成型产品的性能劣化。所得聚甲醛树脂组合物适用于形成挤出成型制品。

9. 发明申请

US20150166768A1 FUEL RESISTANT RESIN MOLDED BODY 有权
标题翻译：耐燃树脂模制体
公开(公告)号：US20150166768A1
公开(公告)日：2015-06-18
申请号：US14360919
申请日：2012-10-01
申请人： Polyplastics Co., Ltd.
发明人： Akihide Shimoda
IPC分类号： C08K5/3492 , C08K5/098
CPC分类号： C08K5/34924 , B29C47/0004 , B29C47/0054 , B29K2059/00 , B29K2995/0068 , C08K5/098 , C08L59/00 , C08L59/04
摘要： Provided is a fuel resistant resin molded body which is scarcely deteriorated even if immersed in high temperature fuel oil for a long period of time. A polyacetal resin composition, which contains a polyacetal resin, a hindered phenol antioxidant represented by a specific general formula and a fatty acid calcium salt, is molded. The content of the hindered phenol antioxidant in the polyacetal resin composition is from 0.05 part by mass to 1.0 part by mass (inclusive) relative to 100 parts by mass of the polyacetal resin, and the content of the fatty acid calcium salt in the polyacetal resin composition is from 0.01 part by mass to 2.0 parts by mass (inclusive) relative to 100 parts by mass of the polyacetal resin.
摘要翻译：提供一种即使浸渍在高温燃料油中长时间也几乎不劣化的耐燃树脂成形体。模塑含有聚缩醛树脂，由特定通式表示的受阻酚抗氧化剂和脂肪酸钙盐的聚缩醛树脂组合物。聚缩醛树脂组合物中的受阻酚抗氧化剂的含量相对于聚缩醛树脂100质量份为0.05质量份〜1.0质量份，聚缩醛树脂中的脂肪酸钙盐的含量组合物相对于100质量份聚缩醛树脂为0.01质量份〜2.0质量份（以下）。

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