Y1 20

Example 6

Synthesis of Resin 6

A 3-L flask equipped with a stirrer, thermometer, nitrogen purge line and reflux condenser was charged with 39.2 g (0.10 mol) of Compound (S-1), 26.5 g (0.10 mol) of Compound (S-2), 27.1 g (0.05 mol) of Compound (S-3c), 9.3 g (0.05 mol) of Compound (S-4), and 86.0 g (0.20 mol) of Compound (S-7), further with 2,000 g of toluene, and heated at 70° C. Thereafter, 1.0 g of a toluene solution of chloroplatinic acid (platinum concentration 0.5 wt %) was added, and 58.2 g (0.30 mol) of Compound (S-5) and 317.0 g (0.20 mol) of Compound (S-6) wherein y¹=20 (Shin-Etsu Chemical Co., Ltd.) were added dropwise over 1 hour. The molar ratio of the total amount of hydrosilyl groups to the total amount of alkenyl groups was 1/1. At the end of dropwise addition, the reaction solution was heated at 100° C. and aged for 6 hours. Toluene was distilled off in vacuum from the reaction solution, yielding Resin 6. On ¹H—NMR and ²⁹Si—NMR spectroscopy (Bruker Corp.), Resin 6 was identified to contain recurring units having formulae (a1) to (a5) and (b1) to (b5). On GPC analysis, it was confirmed that the peaks assigned to the reactants had disappeared, proving that a polymer corresponding to the charge ratio was synthesized. Resin 6 had a Mw of 44,000 and a silicone content of 56.3 wt %.

Example 4

Synthesis of Resin 4

A 3-L flask equipped with a stirrer, thermometer, nitrogen purge line and reflux condenser was charged with 39.2 g (0.10 mol) of Compound (S-1), 26.5 g (0.10 mol) of Compound (S-2), 32.5 g (0.05 mol) of Compound (S-3a), 9.3 g (0.05 mol) of Compound (S-4), and 86.0 g (0.20 mol) of Compound (S-7), further with 2,000 g of toluene, and heated at 70° C. Thereafter, 1.0 g of a toluene solution of chloroplatinic acid (platinum concentration 0.5 wt %) was added, and 58.2 g (0.30 mol) of Compound (S-5) and 317.0 g (0.20 mol) of Compound (S-6) wherein y¹=20 (Shin-Etsu Chemical Co., Ltd.) were added dropwise over 1 hour. The molar ratio of the total amount of hydrosilyl groups to the total amount of alkenyl groups was 1/1. At the end of dropwise addition, the reaction solution was heated at 100° C. and aged for 6 hours. Toluene was distilled off in vacuum from the reaction solution, yielding Resin 4. On ¹H—NMR and ²⁹Si—NMR spectroscopy (Bruker Corp.), Resin 4 was identified to contain recurring units having formulae (a1) to (a5) and (b1) to (b5). On GPC analysis, it was confirmed that the peaks assigned to the reactants had disappeared, proving that a polymer corresponding to the charge ratio was synthesized. Resin 4 had a Mw of 43,000 and a silicone content of 55.7 wt %.

Example 5

Synthesis of Resin 5

A 3-L flask equipped with a stirrer, thermometer, nitrogen purge line and reflux condenser was charged with 39.2 g (0.10 mol) of Compound (S-1), 26.5 g (0.10 mol) of Compound (S-2), 26.6 g (0.05 mol) of Compound (S-3b), 9.3 g (0.05 mol) of Compound (S-4), and 86.0 g (0.20 mol) of Compound (S-7), further with 2,000 g of toluene, and heated at 70° C. Thereafter, 1.0 g of a toluene solution of chloroplatinic acid (platinum concentration 0.5 wt %) was added, and 58.2 g (0.30 mol) of Compound (S-5) and 317.0 g (0.20 mol) of Compound (S-6) wherein y¹=20 (Shin-Etsu Chemical Co., Ltd.) were added dropwise over 1 hour. The molar ratio of the total amount of hydrosilyl groups to the total amount of alkenyl groups was 1/1. At the end of dropwise addition, the reaction solution was heated at 100° C. and aged for 6 hours. Toluene was distilled off in vacuum from the reaction solution, yielding Resin 5. On ¹H—NMR and ²⁹Si—NMR spectroscopy (Bruker Corp.), Resin 5 was identified to contain recurring units having formulae (a1) to (a5) and (b1) to (b5). On GPC analysis, it was confirmed that the peaks assigned to the reactants had disappeared, proving that a polymer corresponding to the charge ratio was synthesized. Resin 5 had a Mw of 45,000 and a silicone content of 56.3 wt %.