	US 12,135,086 B2
	Material for gasket
Tetsuo Oohinata, Tokyo (JP); and Nahoko Kitajima, Tokyo (JP)
Assigned to NICHIAS CORPORATION, Tokyo (JP)
Appl. No. 17/434,169
Filed by NICHIAS CORPORATION, Tokyo (JP)
PCT Filed Feb. 20, 2020, PCT No. PCT/JP2020/006764 § 371(c)(1), (2) Date Aug. 26, 2021, PCT Pub. No. WO2020/175311, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-033793 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0170549 A1, Jun. 2, 2022
Int. Cl. F16J 15/12 (2006.01); C09K 3/10 (2006.01)

CPC F16J 15/12 (2013.01) [C09K 3/1009 (2013.01); C09K 2003/1084 (2013.01); C09K 2200/0213 (2013.01); C09K 2200/0612 (2013.01); C09K 2200/0637 (2013.01); C09K 2200/0647 (2013.01); C09K 2200/0672 (2013.01)]

6 Claims

1. A material for gaskets, comprising at least a substrate formed of a metal plate, a metal surface coating layer formed on one side surface or both side surfaces of the substrate, a rubber layer formed via the metal surface coating layer on the substrate, and a primer layer formed between the metal surface coating layer and the rubber layer, wherein the primer layer comprises a cured product of a phenolic resin or a cured product of an epoxy resin, wherein the rubber layer is formed in a portion in contact with engine coolant, and wherein

the metal surface coating layer consists of (A) one or more carbonates selected from the group consisting of Mg carbonate, Co carbonate, Zr carbonate, Mn carbonate, Ni carbonate, and Cu carbonate and (B) one or more selected from the group consisting of silica, alumina, zirconia, and titania.