Patent ID: 11932732
Assignee: DIC CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A binder that is useful for a casting sand mold according to an ink jet type lamination shaping method, the binder comprising:
a resol-type phenolic resin (R) having a ratio (Mw/Mn) of mass average molecular weight (Mw) to number average molecular weight (Mn) in a range of 1.0 or more and 3.5 or less, with a content of a phenolic monomer contained therein being in a range of 5% or less,
wherein the resol-type phenolic resin (R) is obtained by reacting aldehydes (A1), phenols (P1), and a compound (N) having two or more phenolic hydroxyl groups in one molecule in the presence of an alkali catalyst (B1).