Taiyo Ink Mfg. Co., Ltd.

Taiyo Holdings Co., Ltd.

Rina Yoshikawa

Hiroshi Matsumoto

Masayuki Shimura

Masato Yoshida

Xiaozhu Wei

Hideyuki Ito

[Problem to be Solved] Provided is a curable composition for inkjet printing, a coating film obtained from which has higher heat resistance than conventional coating films. [Solution] It is a curable composition for inkjet printing, comprising (A) a (meth)acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C) a photopolymerization initiator. Accordingly, an obtained coating film does not crack, has excellent adhesion to a conductor, and maintains sufficient hardness even after a thermal history that corresponds to a plurality of times of soldering. The above problem to be solved is also solved by a curable composition for inkjet printing, comprising (A') a (meth) acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1&#x2032;) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2&#x2032;) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C&#x2032;) a photopolymerization initiator.

Curable composition for inkjet printing, cured product of same, and electronic component having the cured product

Provided are a curable composition for inkjet, which not only allows surface curability in formation of a coating film by an inkjet system to be enhanced, but also is not reduced in characteristics conventionally provided, such as solder heat resistance and gold plating resistance, and a cured product and a printed wiring board using the curable composition. The curable composition for inkjet of the present invention includes (A) an alkylene chain-containing bifunctional (meth)acrylate compound, (B) an &#x3b1;-aminoalkylphenone-based photopolymerization initiator, and (C) an acylphosphine oxide-based photopolymerization initiator, wherein, when the thickness is 10 &#x3bc;m, the absorbance at a wavelength of 365 nm is 0.08 to 0.8 and the absorbance at a wavelength of 385 nm is 0.05 to 0.3.

Curable composition for ink-jet printing, cured object, and printed wiring board

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Saitama, Japan

Rina Yoshikawa