The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
Jun. 20, 2012
Shinji Tsuchikawa, Ibaraki, JP;
Masanori Akiyama, Ibaraki, JP;
Hikari Murai, Ibaraki, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
A method for producing a curing agent having an acidic substituent and an unsaturated maleimido group, including reacting, in an organic solvent, a maleimide compound (a) having at least two N-substituted maleimido groups in a molecule thereof with an amine compound (b) having an acidic substituent (represented by formula (I) below); a thermosetting resin composition containing the curing agent (A) produced through the method and a compound (B) which is cured with the curing agent, wherein a cured product of the composition has a glass transition temperature of 200° C. or higher; and a prepreg and a laminated sheet produced therefrom. The thermosetting resin composition can produce a prepreg or laminated sheet exhibiting excellent performance suitable for a printed wiring board for electronic devices and similar devices.