Thermosetting solution composition and prepreg
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example 1
(1) Preparation of Thermosetting Solution Composition
[0097] In a four-necked 100 mL volume separable flask equipped with a stirrer, a reflux condenser and a nitrogen gas inlet were placed 11.77 g (0.0400 mol) of a-BPDA, 4.97 g (0.0200 mol) of PEPA, and 13.54 g of ethanol in a nitrogen gas stream. The resulting mixture was stirred under reflux for 5 hours to give a homogeneous solution. The solution was then cooled to room temperature. To the solution were added under stirring 6.58 g (0.0225 mol) of TPE-R and 2.97 g (0.0275 mol) of PPD. The resulting mixture was heated at 60° C. for 60 mixtures to give a homogeneous solution (thermosetting solution composition).
[0098] The homogeneous solution was spread over a polyamide film (Upilex 125S, available from Ube Industries, Ltd.) and successively heated at 80° C. for 30 min., 135° C. for 30 min., 180° C. for 30 min., 250° C. for 30 min., 300° C. for 30 muin., and 370° C. for 60 min., to give a clear resin film having a thickness of app...
example 2
(1) Preparation of Thermosetting Solution Composition
[0103] The procedures of Example 1-(1) were repeated except that the TPE-R, PPD and ethanol were used in amounts of 4.39 g (0.0150 mol), 3.78 g (0.0350 mol), and 11.72 g, respectively, to give a homogeneous solution (thermosetting solution composition). Further, the homogeneous solution was processed in the same manner as in Example 1-(1), to give a clear resin film (thickness: approx. 0.1 mm).
[0104] The viscosity of the homogeneous solution and Tg of the resin film are set forth in Table 1.
(2) Preparation of Prepreg
[0105] The procedures of Example 1-(2) were repeated using the homogeneous solution prepared in (1) above, to prepare a prepreg.
[0106] The prepreg was subjected to measurement of dynamic viscoelasticity. The measured viscoelasticity is shown in FIG. 1.
(3) Manufacture of Cured Resin Sheet
[0107] The procedures of Example 1-(3) were repeated using the prepreg prepared in (2) above, to manufacture a cured resin s...
example 3
(1) Preparation of Thermosetting Solution Composition
[0109] The procedures of Example 1-(1) were repeated except that the a-BPDA, s-BPDA, PEPA and ethanol were used in amounts of 5.89 g (0.0200 mol), 5.89 g (0.0200 mol), 4.97 g (0.0200 mol), and 12.37 g, respectively, to give a homogeneous solution (thermosetting solution composition). Further, the homogeneous solution was processed in the same manner as in Example 1-(1), to give a clear resin film (thickness: approx. 0.1 mm).
[0110] The viscosity of the homogeneous solution and Tg of the resin film are set forth in Table 1.
(2) Preparation of Prepreg
[0111] The procedures of Example 1-(2) were repeated using the homogeneous solution prepared in (1) above, to prepare a prepreg.
(3) Manufacture of Cured Resin Sheet
[0112] The procedures of Example 1-(3) were repeated using the prepreg prepared in (2) above, to manufacture a cured resin sheet.
[0113] The volatile content (Vc) and resin content (Rc) were determined from the data me...
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