US 11,920,028 B2
Curable composition and method for producing curable composition
Toshio Kobayashi, Osaka (JP); and Takaaki Inoue, Osaka (JP)
Assigned to Sunstar Engineering Inc., Osaka (JP)
Filed by Sunstar Engineering Inc., Osaka (JP)
Filed on May 23, 2022, as Appl. No. 17/751,337.
Claims priority of application No. 2021-194779 (JP), filed on Nov. 30, 2021.
Prior Publication US 2022/0389212 A1, Dec. 8, 2022
Int. Cl. C08K 5/16 (2006.01); C08K 5/25 (2006.01); C08K 5/3445 (2006.01); C08L 63/00 (2006.01); C09J 163/00 (2006.01); C08J 3/24 (2006.01); C08K 5/00 (2006.01)
CPC C08L 63/00 (2013.01) [C08K 5/25 (2013.01); C08K 5/3445 (2013.01); C08J 3/24 (2013.01); C08K 5/0025 (2013.01); C08K 5/16 (2013.01); C08L 2205/03 (2013.01); C09J 163/00 (2013.01)] 8 Claims
 
1. An adhesive composition comprising:
an elastomer (A), an epoxy resin (B), and a latent curing agent (C), a filler (D), a thermoplastic resin (E), a crosslinking agent (F) for elastomers, and a plasticizer (G), wherein
the latent curing agent (C) comprises a combination of two or more latent curing agents,
at least one comprised in the latent curing agent (C) comprises an imidazole compound having a C10-C23 aliphatic alkane structure,
at least one comprised in the latent curing agent (C) comprises a dihydrazide compound having a C10-C23 aliphatic alkylene structure,
the adhesive composition includes the epoxy resin (B) in an amount of 0.2 parts by mass or more and 10 parts by mass or less based on 100 parts by mass of the curable composition, and
the melting points of at least two latent curing agents comprised in the latent curing agent (C) differ by a range of 10° C. to 80° C.