Title:
FLAME-RETARDANT SOUNDPROOFING MATERIAL FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/007807
Kind Code:
A1
Abstract:
This flame-retardant soundproofing material for a vehicle comprises a polyurethane foam obtained by foam-molding a urethane resin composition. The urethane resin composition has (A) an isocyanate component, (B) a polyol component, and (C) expanded graphite. The (A) isocyanate component has a mixture of 2,4'-MDI and 4,4'-MDI, and one or more modified forms selected from carbodiimide modified forms and uretonimine modified forms of at least one of the mixture. The modified form content of the urethane resin composition is 5.0-8.8 mass%. The (B) polyol component has a polyether polyol as the main component. The expansion initiation temperature of the (C) expanded graphite is 170-200°C, the expansion ratio at 250°C is ten-fold or greater, and the (C) expanded graphite content of the urethane resin composition is 8-20 mass%.
Inventors:
SUZUKI YASUO (JP)
KANEDA MASAHITO (JP)
TAGUCHI HIROKI (JP)
SATO MASARU (JP)
KONDO HIROYUKI (JP)
ITO KENICHIRO (JP)
OWAKI JUNKI (JP)
KANEDA MASAHITO (JP)
TAGUCHI HIROKI (JP)
SATO MASARU (JP)
KONDO HIROYUKI (JP)
ITO KENICHIRO (JP)
OWAKI JUNKI (JP)
Application Number:
PCT/JP2022/009741
Publication Date:
February 02, 2023
Filing Date:
March 07, 2022
Export Citation:
Assignee:
TOKAI CHEMICAL IND (JP)
SUMITOMO RIKO CO LTD (JP)
SUMITOMO RIKO CO LTD (JP)
International Classes:
C08G18/00; B60R13/08; C08G18/48; C08G18/72; C08G18/76; C08G18/79
Foreign References:
| JP2016510837A | 2016-04-11 | |||
| JP2014527093A | 2014-10-09 | |||
| JP2016525613A | 2016-08-25 | |||
| JP2003097645A | 2003-04-03 | |||
| JP2008138032A | 2008-06-19 |
Attorney, Agent or Firm:
HIGASHIGUCHI Michiaki et al. (JP)
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