公开(公告)号：US11001690B2

公开(公告)日：2021-05-11

申请号：US16029294

申请日：2018-07-06

Applicant: NHK SPRING CO., LTD.

Inventor： Shigeki Ichimura ,  Kunikazu Takiwaki ,  Kunio Asobe ,  Hiroyuki Orito ,  Takaharu Matsuo ,  Kiyoshi Ota ,  Hitoshi Komatsu ,  Taiki Futamura ,  Toshiharu Sato

IPC: C08J9/12 ,  C08G18/48 ,  C08G18/20 ,  C08G18/18 ,  B60N2/70 ,  C08G18/76 ,  C08G18/10

Abstract: Provided is a foamed urethane containing a cushion material, the foamed urethane containing a hard segment and a soft segment, in which the foamed urethane is a reaction cured product formed using an isocyanate component of an MDI compound. In a first aspect, a spin-spin relaxation time (T2) of the hard segment in the foamed urethane is from 20 μsec to 40 μsec, and a volume abundance ratio of the hard segment is from 5% to 40%. In a second aspect, a foamed urethane includes: a first region in which T2 of the hard segment is from 30 μsec to 40 μsec, and a volume abundance ratio of the hard segment is from 10% to 40%, and a second region in which T2 of the hard segment is from 20 μsec to less than 30 μsec, and a volume abundance ratio of the hard segment is from 5% to 40% in a H1 solid-state pulse NMR measurement, and which is adjacent to the first region.

公开(公告)号：US20190010301A1

公开(公告)日：2019-01-10

申请号：US16029294

申请日：2018-07-06

Applicant: NHK SPRING CO., LTD.

Inventor： Shigeki Ichimura ,  Kunikazu Takiwaki ,  Kunio Asobe ,  Hiroyuki Orito ,  Takaharu Matsuo ,  Kiyoshi Ota ,  Hitoshi Komatsu ,  Taiki Futamura ,  Toshiharu Sato

IPC: C08J9/12 ,  C08G18/48 ,  C08G18/20 ,  C08G18/18 ,  C08G18/76 ,  B60N2/70

Abstract: Provided is a foamed urethane containing a cushion material, the foamed urethane containing a hard segment and a soft segment, in which the foamed urethane is a reaction cured product formed using an isocyanate component of an MDI compound. In a first aspect, a spin-spin relaxation time (T2) of the hard segment in the foamed urethane is from 20 μsec to 40 μsec, and a volume abundance ratio of the hard segment is from 5% to 40%. In a second aspect, a foamed urethane includes: a first region in which T2 of the hard segment is from 30 μsec to 40 μsec, and a volume abundance ratio of the hard segment is from 10% to 40%, and a second region in which T2 of the hard segment is from 20 μsec to less than 30 μsec, and a volume abundance ratio of the hard segment is from 5% to 40% in a H1 solid-state pulse NMR measurement, and which is adjacent to the first region.