[O:1]1[CH:7]2[CH:2]1CC(CC[Si](OC)(OC)OC)[CH2:5][CH2:6]2.COC([SiH3])(OC)OC.C1([Si](OC)(OC)OC)C=CC=CC=1.[C:38](O)(=O)[C:39]([OH:41])=[O:40]>CO.O>[C:39]([O:41][CH:6]([CH3:5])[CH2:7][O:1][CH3:2])(=[O:40])[CH3:38]
In a 1000 ml glass flask, to a mixture of 150 g of methanol, 22 g of 2-(3,4-epoxycyclohexyl) ethyl trimethoxy silane, 77 g of trimethoxymethyl silane, 14 g of phenyl trimethoxy silane, and 1.5 g of oxalic acid was added dropwise a mixed solution of 40 g of deionized water and 20 g of methanol at a liquid temperature of 40 degrees C. After that, this solution was stirred for 12 hours at 40 degrees C. After the reaction finished, the solvent was removed under a reduced pressure. Thus-obtained residue was dissolved in 1000 ml of ethyl acetate, and washed with deionized water for washing. After the water layer was separated, the organic layer was washed twice with deionized water. To this organic layer was added 600 g of propylene glycol monomethyl ether acetate (PGMEA), and the contents were heated up to a liquid temperature of 40 degrees C. under a reduced pressure to remove ethyl acetate and to give a PGMEA solution of a polymer.
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