公开(公告)号：US20210047481A1

公开(公告)日：2021-02-18

申请号：US17079388

申请日：2020-10-23

Applicant: KANEKA CORPORATION

Inventor： Soichi Uchida ,  Kazunori Saegusa ,  Mitsutaka Sato

IPC: C08J3/22 ,  C08J9/00 ,  C08J9/228 ,  C08L69/00 ,  C08L101/00 ,  B29C45/00 ,  B29C45/14

Abstract: A masterbatch (C) containing thermally expandable microcapsules (A) and a carrier resin composition (B) is provided. The carrier resin composition (B) contains a carrier resin (B1) and a plasticizer (B2), the carrier resin (B1) being an acrylic resin having a weight average molecular weight of 8,000 or more and 350,000 or less, and the plasticizer (B2) being an acrylic plasticizer having a weight average molecular weight of 1,000 or more and 20,000 or less. The carrier resin composition (B) is substantially compatible with a polycarbonate resin and has a shear viscosity of 1.0 Pa·s or more and 1.5×106 Pa·s or less at 80° C. The occurrence of whitening is suppressed and a good appearance can be obtained in an injection molded foam made with the masterbatch. A polycarbonate resin composition, an injection molded foam, and a method for producing an injection molded foam are provided.

公开(公告)号：US11898016B2

公开(公告)日：2024-02-13

申请号：US17079388

申请日：2020-10-23

Applicant: KANEKA CORPORATION

Inventor： Soichi Uchida ,  Kazunori Saegusa ,  Mitsutaka Sato

IPC: C08J3/22 ,  B29C45/00 ,  B29C45/14 ,  C08J9/00 ,  C08J9/228 ,  C08L69/00 ,  C08L101/00

CPC classification number: C08J3/22 ,  B29C45/0001 ,  B29C45/14795 ,  C08J9/0061 ,  C08J9/228 ,  C08L69/00 ,  C08L101/00 ,  C08J2203/22 ,  C08J2333/08 ,  C08J2333/10 ,  C08J2369/00 ,  C08L2203/14 ,  C08L2205/03 ,  C08L2207/53

Abstract: A masterbatch (C) containing thermally expandable microcapsules (A) and a carrier resin composition (B) is provided. The carrier resin composition (B) contains a carrier resin (B1) and a plasticizer (B2), the carrier resin (B1) being an acrylic resin having a weight average molecular weight of 8,000 or more and 350,000 or less, and the plasticizer (B2) being an acrylic plasticizer having a weight average molecular weight of 1,000 or more and 20,000 or less. The carrier resin composition (B) is substantially compatible with a polycarbonate resin and has a shear viscosity of 1.0 Pa·s or more and 1.5×106 Pa·s or less at 80° C. The occurrence of whitening is suppressed and a good appearance can be obtained in an injection molded foam made with the masterbatch. A polycarbonate resin composition, an injection molded foam, and a method for producing an injection molded foam are provided.