Title:
POLYURETHANE FOAM, METHOD FOR PRODUCING SAME, AND SOUNDPROOFING MATERIAL FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2020/189454
Kind Code:
A1
Abstract:
Provided are: a polyurethane foam which has a good sound absorption coefficient in a middle- to high-frequency band of 3000-4000 Hz, can be reduced in weight while maintaining sound absorption performance equivalent to or higher than that of the conventional foam, and can be used as a soundproofing material for a vehicle without being used in combination with other materials; a method for producing the polyurethane foam; and a soundproofing material for a vehicle. Provided are: a polyurethane foam having a sound absorption coefficient of 0.95 or more in the entire frequency range of 3000-4000 Hz, as measured through sound absorption coefficient measurement by using the normal incidence method, has a density of 5-25 kg/m3, and has a residual film rate of a foam cell of 40-94% (exclusive of 94%); a method for producing the polyurethane foam; and a soundproofing material for a vehicle.
More Like This:
| JP2004131649 | RIGID POLYURETHANE FOAM AND METHOD FOR PRODUCING THE SAME |
| JPH10176063 | PRODUCTION OF URETHANE EMULSION |
| JPH07133369 | PRODUCTION OF RIGID POLYURETHANE FOAM |
Inventors:
TAKADA TAKASHI (JP)
FUJIWARA YUKIHIRO (JP)
SHIBUYA TAKASHI (JP)
FUJIWARA YUKIHIRO (JP)
SHIBUYA TAKASHI (JP)
Application Number:
PCT/JP2020/010639
Publication Date:
September 24, 2020
Filing Date:
March 11, 2020
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
C08G18/00; C08G18/18; C08G18/24; C08G18/48; C08G101/00
Foreign References:
| JP2004124076A | 2004-04-22 | |||
| JP2005113134A | 2005-04-28 | |||
| JP2007169556A | 2007-07-05 | |||
| JP2014141595A | 2014-08-07 | |||
| JP2015024028A | 2015-02-05 | |||
| JP2006265467A | 2006-10-05 | |||
| JP2019183008A | 2019-10-24 |
Attorney, Agent or Firm:
T.S. PARTNERS et al. (JP)
Download PDF: