Title:
FOAM RUBBER, METHOD FOR PRODUCING SAME AND SOUND ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/053926
Kind Code:
A1
Abstract:
A foam rubber which has open cells where hollow cells are connected with each other, wherein: the Heywood diameter of the cells as determined in accordance with JIS Z 8827-1 (2018) is 180 μm or less; and the density of the foam rubber is from 0.10 to 0.35 g/cm3. A method for producing a foam rubber, said method comprising: an expansion step for obtaining a foam by expanding an elastomer composition that contains a vulcanizing agent; and a gelling step for obtaining a gel by adding a gelling agent to the foam. In the gelling step, the gelling time after the addition of the gelling agent is from 2 minutes to 8 minutes.
Inventors:
ONOZUKA MASAO (JP)
SUNADA TAKASHI (JP)
SUNADA TAKASHI (JP)
Application Number:
PCT/JP2020/025840
Publication Date:
March 25, 2021
Filing Date:
July 01, 2020
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
B60R13/08; C08J9/30; C08K3/34; C08L9/10
Domestic Patent References:
| WO2019117084A1 | 2019-06-20 |
Foreign References:
| JP2015110781A | 2015-06-18 | |||
| JP2004107436A | 2004-04-08 | |||
| JP2016159037A | 2016-09-05 | |||
| JP2014210899A | 2014-11-13 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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