	US 12,012,501 B2
	Resin composition for acoustic matching layer
Hideshi Tomita, Chiba (JP); Takashi Suzuki, Okazaki (JP); Yoshitaka Saito, Ota-ku (JP); and Nana Isomoto, Chiba (JP)
Assigned to NISSHINBO HOLDINGS INC., Tokyo (JP)
Appl. No. 17/288,286
Filed by NISSHINBO HOLDINGS INC., Tokyo (JP)
PCT Filed Sep. 27, 2019, PCT No. PCT/JP2019/038207 § 371(c)(1), (2) Date Apr. 23, 2021, PCT Pub. No. WO2020/110445, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-221481 (JP), filed on Nov. 27, 2018.
Prior Publication US 2021/0388179 A1, Dec. 16, 2021
Int. Cl. C08K 7/28 (2006.01); B06B 1/00 (2006.01); C08G 59/18 (2006.01); C08G 59/24 (2006.01); C08G 59/68 (2006.01); C08K 3/36 (2006.01); C08K 7/22 (2006.01); C08L 63/00 (2006.01); C08L 101/12 (2006.01); G10K 11/02 (2006.01); H04R 17/00 (2006.01)

CPC C08K 7/28 (2013.01) [C08G 59/184 (2013.01); C08G 59/245 (2013.01); C08G 59/686 (2013.01); C08K 3/36 (2013.01); C08K 7/22 (2013.01); C08L 63/00 (2013.01); C08L 101/12 (2013.01); G10K 11/02 (2013.01); B06B 1/00 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); H04R 17/00 (2013.01)]

6 Claims

1. A resin composition for an acoustic matching layer, comprising a resin, a hollow filler, and a thixotropy imparting agent, wherein the resin composition has a viscosity measured using a B-type viscometer with rotor No. 4 at a rotation speed of 0.3 rpm at 25° C. of 1130 to 4000 Pa·s, and has a thixotropy index expressed by the ratio (V1/V2) between a viscosity (V1) measured using a B-type viscometer with rotor No. 4 at a rotation speed of 0.3 rpm and a viscosity (V2) measured using a B-type viscometer with rotor No. 4 at a rotation speed of 1.5 rpm, at 50° C., of 3.0 to 5.0.