公开(公告)号：US20240182708A1

公开(公告)日：2024-06-06

申请号：US18284995

申请日：2022-03-07

Applicant: TOYOBO MC Corporation

Inventor： Yuki TAMASHIRO ,  Takuya AKAISHI ,  Yoshitaka AYUZAWA

IPC: C08L69/00 ,  C08G63/64 ,  C08K3/22 ,  C08K5/5313

CPC classification number: C08L69/005 ,  C08G63/64 ,  C08K3/22 ,  C08K5/5313 ,  C08K3/2279 ,  C08L2201/02 ,  C08L2207/04

Abstract: The present invention aims to provide a flame-retardant thermoplastic polyester elastomer resin composition which has particularly excellent extrusion moldability, and from which a hollow and long molded article can be produced with a uniform thickness and with high accuracy. A flame-retardant thermoplastic polyester elastomer resin composition comprising 50 to 94 mass % of a thermoplastic polyester elastomer and 1 to 45 mass % of a flame retardant, wherein the thermoplastic polyester elastomer comprises a hard segment made of a polyester constituted of an aromatic dicarboxylic acid and an aliphatic or alicyclic diol and a soft segment mainly made of an aliphatic polycarbonate, wherein the hard segment and the soft segment are bonded to each other, and wherein the thermoplastic polyester elastomer is at least partially end-capped with a polycarbodiimide, characterized in that an MFR value of the resin composition is 2 to 15 g/10 min, and a difference between an MFR value at 35 minutes and an MFR value at 5 minutes after the resin composition is added is 0 to 20 g/10 min.

公开(公告)号：US20240158571A1

公开(公告)日：2024-05-16

申请号：US18282864

申请日：2022-03-07

Applicant: TOYOBO MC Corporation

Inventor： Yuki TAMASHIRO ,  Takuya AKAISHI ,  Yoshitaka AYUZAWA

IPC: C08G63/183 ,  C08G63/672 ,  C08G63/91 ,  C08G64/02 ,  C08K5/13 ,  C08K5/18 ,  C08L69/00 ,  F16L11/04

CPC classification number: C08G63/183 ,  C08G63/672 ,  C08G63/916 ,  C08G64/0208 ,  C08K5/13 ,  C08K5/18 ,  C08L69/005 ,  F16L11/04 ,  C08L2201/02 ,  C08L2201/08 ,  C08L2203/30 ,  C08L2207/04

Abstract: The present invention aims to provide a thermoplastic polyester elastomer having particularly excellent extrusion moldability and extrusion molding stability, from which a hollow and long molded article can be stably produced with a uniform thickness for a long time. A polyester elastomer comprising a hard segment made of a polyester constituted of an aromatic dicarboxylic acid and an aliphatic or alicyclic diol and a soft segment made of an aliphatic polycarbonate, wherein the hard segment and the soft segment are bonded to each other, wherein the polyester elastomer is at least partially end-capped with a reactive compound, wherein the reactive compound comprises a polycarbodiimide, wherein the polyester elastomer has an acid value of 15 eq/ton or less, and wherein, under a condition of 230° C., the polyester elastomer satisfies (i) the melt viscosity at a shear rate of 10/sec after a preheating time of 5 minutes is 1,800 Pa·s or more, and the melt viscosity at a shear rate of 1,000/sec after a preheating time of 5 minutes is 800 Pa·s or less; and (ii) a ratio of the melt viscosity measured at a shear rate of 10/sec after a preheating time of 5 minutes to the melt viscosity measured at a shear rate of 10/sec after a preheating time of 25 minutes is 0.7 to 1.3.