公开(公告)号：US20240294812A1

公开(公告)日：2024-09-05

申请号：US18571940

申请日：2022-04-28

Applicant: SIKA JAPAN LTD. ,  NIPPON STEEL CORPORATION

Inventor： Kazunori ISHIKAWA ,  Tsubasa ITO ,  Takashi ARAMAKI ,  Hiroshi OISHI

IPC: C09J163/00 ,  C09J11/06 ,  C09J11/08

CPC classification number: C09J163/00 ,  C09J11/06 ,  C09J11/08

Abstract: An adhesive composition is provided for laminating an electromagnetic steel sheet, including an epoxy resin (AA) containing an epoxy resin (A) having equal to or more than 3 epoxy groups in one molecule, a phenoxy resin (B) having a glass transition temperature exceeding 120° C. in an uncured state in differential scanning calorimetry, and an amine-based latent curing agent (C), wherein the epoxy resin (A) contains an epoxy resin having a softening temperature equal to or higher than 60° C., a content of the phenoxy resin (B) is 20 to 80 parts by mass based on 100 parts by mass of the epoxy resin (AA), and a glass transition temperature of the resulting adhesive cured product in differential scanning calorimetry exceeds 160° C.

公开(公告)号：US20240059931A1

公开(公告)日：2024-02-22

申请号：US18269434

申请日：2021-12-06

Applicant: SIKA JAPAN LTD

Inventor： Misaki MATSUMURA

IPC: C09J7/35 ,  C09J11/06 ,  C09J11/08 ,  C09J125/04

CPC classification number: C09J7/35 ,  C09J11/06 ,  C09J11/08 ,  C09J125/04 ,  C09J2203/354

Abstract: A hot-melt composition has excellent workability, hot flow resistance, balance between adhesion and detachability, volatility resistance, and hot creep resistance. The hot-melt composition includes: as thermoplastic elastomers, a styrene-based thermoplastic elastomer having a weight average molecular weight of 300,000 or more, a styrene-based thermoplastic elastomer having a styrene content of no greater than 20% by mass, and an olefin-based thermoplastic elastomer including an ethylene propylene rubber and/or butyl rubber; as tackifiers, an aromatic petroleum resin, a terpene phenol resin, and an amorphous polyalphaolefin; a high molecular weight paraffin oil having a weight average molecular weight of 1,000 or more; and a low molecular weight paraffin oil having a weight average molecular weight of less than 1,000.