公开(公告)号：US20230203263A1

公开(公告)日：2023-06-29

申请号：US17439258

申请日：2020-03-09

申请人： JSP CORPORATION

发明人： Takumi SAKAMURA ,  Naoki MOCHIDA ,  Akinobu HIRA

IPC分类号： C08J9/18 ,  C08J9/12 ,  C08J9/228 ,  C08J9/00 ,  C08J3/22 ,  C08K3/38

CPC分类号： C08J9/18 ,  C08J9/122 ,  C08J9/228 ,  C08J9/0004 ,  C08J3/226 ,  C08K3/38 ,  C08J2323/14 ,  C08J2203/06 ,  C08J2203/22 ,  C08K2003/387 ,  B29C44/44

摘要： A molded article of polyolefin-based resin expanded beads having excellent appearance and further suppressed color unevenness is provided.
Polyolefin-based resin expanded beads obtained by expanding polyolefin-based resin particles including one or two or more metal borates selected from zinc borate and magnesium borate, wherein the particles of the metal borate has an arithmetic average particle diameter based on the number of 1 μm or more, and a number rate of the particles of the metal borate having a particle diameter of 5 μm or more is 20% or less. A method for producing polyolefin-based resin expanded beads by releasing expandable polyolefin-based resin particles containing one or two or more metal borates selected from zinc borate and magnesium borate and a physical blowing agent dispersed in an aqueous medium in a closed vessel together with the aqueous medium from the closed vessel to a low pressure region than an inside of the closed vessel to expand the expandable polyolefin-based resin particles, the method comprising: using a metal borate having an arithmetic average particle diameter based on the number of 1 μm or more and a number rate of the particles having a particle diameter of 5 μm or more of 20% or less as the metal borate.

公开(公告)号：US20230151177A1

公开(公告)日：2023-05-18

申请号：US17906033

申请日：2021-03-11

申请人： JSP CORPORATION

发明人： Naoki MOCHIDA

IPC分类号： C08J9/18 ,  C08J3/00 ,  C08J3/24 ,  C08J9/00

CPC分类号： C08J9/18 ,  C08J3/005 ,  C08J3/242 ,  C08J9/0019 ,  C08J2201/026 ,  C08J2203/06 ,  C08J2353/00

摘要： A crosslinked olefin-based thermoplastic elastomer expanded bead including a base polymer having an olefin-based thermoplastic elastomer and a brominated bisphenol-based flame retardant having a chemical structure represented by formula (1). A difference TmTPO-TFR is −5° C. to 40° C., where TmTPO is a melting point of the olefin-based thermoplastic elastomer and TFR is the lower of a glass transition temperature TgFR and a melting point TmFR of the brominated bisphenol-based flame retardant. A xylene insoluble content is 5 mass % to 80 mass %. R1 and R3 in the formula (1) are monovalent substituents, R2 is a divalent substituent, and n is an integer from 1 to 6: