Title:
FOAMED URETHANE RAW MATERIAL
Document Type and Number:
Japanese Patent JP2023051463
Kind Code:
A
Abstract:
To provide a foamed urethane raw material having high toughness and impact resilience, a light weight, and capable of suppressing a change of physical property due to a long term usage, further excellent in demoldability.SOLUTION: A foamed polyurethane raw material comprising a cured product of a composition containing polytetramethylene glycol, a diisocyanate containing a diphenylmethane diisocyanate-based first diisocyanate, a blowing agent, a catalyst, and a foam stabilizer, wherein a mass ratio of the diisocyanate to a total mass of the cured product is 10 mass% to 18 mass%, a mass ratio of the first diisocyanate to the total mass of the cured product is 10 mass% to 18 mass%, the apparent density is 300 kg/m3 to 500 kg/m3, and the independent blowing rate is 0% to 20%, and a rebound resilience is more than 75% and 90% or less.SELECTED DRAWING: None
Inventors:
ITO TOMOYUKI
SERA NORIYUKI
KUSAKAWA KOICHI
SERA NORIYUKI
KUSAKAWA KOICHI
Application Number:
JP2021162147A
Publication Date:
April 11, 2023
Filing Date:
September 30, 2021
Export Citation:
Assignee:
NHK SPRING CO LTD
International Classes:
C08G18/48; A63B59/50; C08G18/10; C08G18/28; C08G18/32; C08G18/42; C08G18/72; C08G18/76
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office