Hitachi Chemical Company, Ltd.

Syunichi Numata

Yasuyuki Hirai

Teruki Aizawa

Hikari Murai

Ken Nanaumi

Minoru Kakitani

Shinichi Kamoshida

Yoshihiro Nakamura

Yoshiyuki Takeda

Norihiro Abe

Kenichi Oohori

Shinichi c/o Shimodate Works Hitachi Kamoshida

Hikari c/o Shimodate Works Hitachi CHEMCO Murai

Minoru c/o Shimodate Works Hitachi Kakitani

The present invention discloses a thermosetting resin composition which comprises (A) 35 to 75 parts by weight of a thermosetting resin comprising a compound having a hydrobenzoxazine ring as a main component, (B) 10 to 25 parts by weight of a polycondensation product of a phenol, a compound having a triazine ring and an aldehyde, and (C) 10 to 45 parts by weight of an epoxy resin, based on 100 parts by weight of the total amount of organic solid components of Components (A), (B) and (C), and (i) a bisphenol F epoxy resin having a weight-average molecular weight of 1,000 to 3,000, or (ii) a mixed epoxy resin of bisphenol F epoxy resin and bisphenol A epoxy resin having a weight average molecular weight of 1,000 to 3,000, is contained in Component (C) in an amount of 0 to 100% by weight of Component (C); and a prepreg, a laminated board for a wiring board and a wiring board using the same.

Dihydrobenzoxazine ring-containing resin, phenolic-triazine-aldehyde condensate and epoxy resin

The present invention discloses a process for producing a benzoxazine resin which comprises the steps of reacting a phenol compound, an aldehyde compound and a primary amine in the presence of an organic solvent to synthesize a benzoxazine resin and removing generated condensation water and the organic solvent from a system under heating and a reduced pressure, wherein a pressure in the reaction system at the time of removal is set to 260 mmHg or higher.

Method for producing benzoxazine resin

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Hitachi, Japan

Syunichi Numata