公开(公告)号：US20220275196A1

公开(公告)日：2022-09-01

申请号：US17637624

申请日：2020-06-09

Applicant: Polyplastics Co., Ltd.

Inventor： Hatsuhiko HARASHINA ,  Tomohiro MONMA ,  Akihiro TAMAOKA

IPC: C08L59/00

Abstract: An automobile interior component obtained using a specific polyacetal resin composition which allows for stable suppression of the generation of mold deposits during molding at elevated temperatures, and the reduction of the amount of formaldehyde generated from a molded article to an extremely low level, as well as the prevention of the bleed-out of an added component from the molded article, and the retention of a favorable appearance of the molded article. The automobile interior component is obtained using a polyacetal resin composition containing, at least 100 parts by mass of a polyacetal polymer (A); 0.03 to 0.30 parts by mass of a hindered phenol antioxidant (B); 0.01 to 0.50 parts by mass of an aliphatic carboxylic acid hydrazide (C); 0.001 to 0.50 parts by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups (D); and 0.001 to 0.30 parts by mass of an alkaline earth metal salt of an aliphatic carboxylic acid (E), and the total amount of the components (C) and (D) is 0.03 to 0.55 parts by mass with respect to 100 parts by mass of the polyacetal polymer (A).

公开(公告)号：US11426903B2

公开(公告)日：2022-08-30

申请号：US17311032

申请日：2019-12-06

Applicant: Polyplastics Co., Ltd.

Inventor： Yoshiaki Taguchi ,  Tatsuya Kawasaki

IPC: B29C43/00 ,  B29C43/52 ,  B29K67/00 ,  B29K105/00

Abstract: A powdery liquid-crystal resin for a press-molded article is disclosed having a bulk density of more than 0.05 g/cm3 and 0.5 g/cm3 or less. The powdery liquid-crystal resin preferably has a particle diameter distribution width as defined by JIS Z8825: 2013 of 3.0 or more and 12 or less. The powdery liquid-crystal resin preferably has an average particle diameter of 10 μm or more and 300 μm or less. The degree of crystallinity of the powdery liquid-crystal resin is preferably 20% or more and 70% or less.

公开(公告)号：US20220195179A1

公开(公告)日：2022-06-23

申请号：US17599636

申请日：2020-03-24

Applicant: Polyplastics Co., Ltd.

Inventor： Kouichi Sakata ,  Ryusei Matsuzaki

IPC: C08L67/02 ,  C08K5/06 ,  C08J3/205

Abstract: A method is disclosed for improving alkaline solution resistance of a thermoplastic resin by blending an aromatic polyvalent carboxylic acid ester into the thermoplastic resin. Preferably, 1 to 15 parts by mass of the aromatic polyvalent carboxylic acid ester are blended with respect to 100 parts by mass of the thermoplastic resin. Additionally, an aromatic polyvalent carboxylic acid ester can be used for improving alkaline solution resistance of a thermoplastic resin. An alkaline solution resistance improving agent is also disclosed for a thermoplastic resin, the alkaline solution resistance improving agent containing an aromatic polyvalent carboxylic acid ester.

公开(公告)号：US20220089858A1

公开(公告)日：2022-03-24

申请号：US17593231

申请日：2020-03-10

Applicant: Polyplastics Co., Ltd.

Inventor： Akihiro TAMAOKA ,  Hatsuhiko HARASHINA ,  Tomohiro MONMA

IPC: C08L59/00 ,  C08K5/098 ,  C08K5/25 ,  C08K5/3445

Abstract: A method for producing a polyacetal resin composition which allows for suppression of formaldehyde generation from a molded article to an extremely low level, and stable suppression of mold deposits during molding. The polyacetal resin composition contains: 100 parts by mass of a polyacetal polymer (A); 0.01 to 0.50 parts by mass of an aliphatic carboxylic acid hydrazide (B); 0.001 to 0.50 parts by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups (C); and 0.001 to 0.30 parts by mass of an alkaline earth metal salt of aliphatic carboxylic acid (D), wherein the total amount of the components (B) and (C) with respect to 100 parts by mass of the polyacetal polymer (A) is 0.03 to 0.55 parts by mass, and wherein the polyacetal polymer (A) is a polyacetal copolymer obtained by copolymerizing trioxane as a principal monomer (a) with a cyclic ether having at least one carbon-carbon bond as a comonomer (b) using a heteropolyacid represented by general formula (1) as a polymerization catalyst (c) to obtain a reaction product, and subsequently adding a carbonate of an alkali metal element or alkaline earth metal element (d) to the reaction product to deactivate the polymerization catalyst (c).

公开(公告)号：US20200223113A1

公开(公告)日：2020-07-16

申请号：US16632257

申请日：2018-07-19

Applicant: Polyplastics Co., LTD. ,  Yamase Electric Co., LTD.

Inventor： Hidemi Kondo

IPC: B29C45/14 ,  B32B15/08

Abstract: A metal resin composite-molded article which can suppress deformation induced by laser processing in a technique for improving the adhesion between a metal plate and a resin by forming grooves on the surface of the metal plate by means of a laser, even if the metal plate is thin. A metal resin composite-molded article obtained by insert-molding a resin composition on a metal plate having a thickness of 500 μm or less, grooves are formed on the surface of the metal plate in which the resin composition is inserted, the width of the grooves is 30-300 μm, the depth of the grooves is at most 24% of the thickness of the metal plate, and the ratio of the width to the depth is 0.1-2.5.

公开(公告)号：US10577498B2

公开(公告)日：2020-03-03

申请号：US15779064

申请日：2016-11-30

Applicant: Polyplastics Co., Ltd.

Inventor： Shinya Yamada ,  Kazuya Goshima

IPC: C08L67/02 ,  C08K5/103 ,  C08G63/183 ,  C08J5/04

Abstract: Provided is a polybutylene terephthalate resin composition which has further improved fluidity (melt fluidity) while maintaining mechanical characteristics. The polybutylene terephthalate resin composition contains 0.05-5 parts by mass of a glycerin fatty acid ester having a hydroxyl value of 200-400, and 0.05-5 parts by mass of a polyvalent alcohol fatty acid ester having a hydroxyl value of 100 or less, with respect to 100 parts by mass of a polybutylene terephthalate resin. The glycerin fatty acid ester preferably contains glycerin and/or a dehydration condensation product thereof, and a fatty acid having 12 or more carbon atoms.

公开(公告)号：US10174270B1

公开(公告)日：2019-01-08

申请号：US15718390

申请日：2017-09-28

Applicant: POLYPLASTICS CO., LTD.

Inventor： Yuki Kanda ,  Tomohiro Monma ,  Takanori Ueda

IPC: F16C33/20 ,  C10M107/50 ,  C10M107/06 ,  C08L59/00 ,  E05D15/16 ,  E05F11/38

Abstract: A method for producing a dust-resistant sliding member, the method including a step of preparing a resin composition containing 0.5 to 5.0 parts by mass of a specific lubricant that is liquid at 25° C., 0.1 to 30 parts by mass of an inorganic filler, 1.0 to 20 parts by mass of a specific modified olefin-based polymer, and 0.01 to 5.0 parts by mass of an alkylene glycol-based polymer having a primary or secondary amino group, per 100 parts by mass of a polyacetal copolymer containing oxyalkylene units in a ratio of 0.4 to 0.9 mol % relative to all of the structural units; and a step of molding the resin composition into a prescribed shape.

公开(公告)号：US20180282650A1

公开(公告)日：2018-10-04

申请号：US15475522

申请日：2017-03-31

Applicant: Polyplastics Co., Ltd.

Inventor： Yuki Kanda ,  Tomohiro Monma ,  Takanori Ueda

IPC: C10M107/50 ,  C08L59/04 ,  C10M107/06 ,  C10M125/30 ,  C10M125/28 ,  C10M107/34 ,  B60J1/16

Abstract: A method for producing a dust-resistant sliding member, the method including a step of preparing a resin composition containing 0.5 to 5.0 parts by mass of a lubricant that is liquid at 25° C. and is composed of at least one material selected from the group consisting of ethylene/α-olefin copolymers, poly-α-olefins and silicones, and 0.1 to 30 parts by mass of an inorganic filler, per 100 parts by mass of a polyacetal resin, and a step of molding the resin composition into a prescribed shape.

公开(公告)号：US10072147B2

公开(公告)日：2018-09-11

申请号：US15149952

申请日：2016-05-09

Applicant: Polyplastics Co., Ltd.

Inventor： Akihide Shimoda ,  Satomi Nakada ,  Yasumitsu Miyamoto ,  Hidemi Kondo

IPC: C08K3/22 ,  C08K5/053 ,  C08L59/00 ,  C08L59/04 ,  C08K5/103 ,  C08K5/134 ,  C08J7/14

CPC classification number: C08L59/04 ,  C08J7/14 ,  C08J2359/02 ,  C08K3/22 ,  C08K5/103 ,  C08K5/134 ,  C08K5/1345 ,  C08K2003/222 ,  C08L71/02 ,  C08L2201/08 ,  F02M2200/9015

Abstract: 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.

公开(公告)号：US20170349742A1

公开(公告)日：2017-12-07

申请号：US15538008

申请日：2015-11-09

Applicant: Polyplastics Co., Ltd.

Inventor： Tadahiro HORIGUCHI ,  Akihide SHIMODA

IPC: C08L59/04

CPC classification number: C08L59/04 ,  C08G2/20 ,  C08L2205/025

Abstract: 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.