| abstract |
(57) [Abstract] [Purpose] When dihydro-1.3-benzoxazines are cured, they are polymerized and cured without producing volatile by-product components. A method of manufacturing the is provided. A method for producing a laminated plate, comprising stacking a predetermined number of sheets containing dihydro-1.3-benzoxazines having two or more groups represented by Chemical formula 1 in a molecule and heating and pressing the sheets. [Chemical 1] In the formula, R 1 is a phenyl group, a substituted phenyl group, a methyl group or a cyclohexyl group, and R 3 is hydrogen, a methyl group, It is an ethyl group or a phenyl group. |