Preparation method for epoxy compound having alkoxysilyl group

A method for preparing an epoxy resin having an alkoxysilyl group, the method comprising:

• performing a ring opening step by reacting at least one epoxy resin selected from a group consisting of Formulae BS, CS, FS, and IS having three or more epoxide groups with an aromatic alcohol having one hydroxyl group as a ring-opening agent in the presence of a phosphine-based catalyst and an optional solvent to provide an intermediate having a ring-opened epoxide group;
• and
• performing an alkoxysilylation step by reacting the intermediate having a ring-opened epoxide group with isocyanate alkoxysilane represented by Formula B below,
• wherein the phosphine-based catalyst is represented by Formula A:
• PRxRyRz Formula A
• in Formula A, Rx, Ry, and Rz are each independently a C1-C10 alkyl group, a C6 or C10 aryl group, or a C6-C10 cycloalkyl group,
• wherein the epoxy compound having the alkoxysilyl group following the alkoxysilylation step is represented by at least one selected from a group consisting of Formulae BF, CF, FF, and IF:
• wherein in Formula BF:
• S is
• wherein in Formulae BF, CF, FF, and IF:
• at least one of the M's is of Formula C;
• at least two of the M's is an epoxy group of Formula E1;
• and remainder of M's are hydrogen,
• and,
• in Formula C, at least one of R1 to R3 is a C1-C5 alkoxy group, and the others are C1-C10 alkyl groups, and Y is represented by Formula 3 or 4,
• wherein in Formula 3 or Formula 4,
• each X is independently selected from the group consisting of H, a C1 to C10 alkyl group, an allyl group, and a C6 or C10 aryl group, wherein the C6 or C10 aryl group is substitutable with a C1-C3 alkyl group, and n′ is an integer from 1 to 5;
• and
• n in Formulae BF and CF is an integer from 1 to 30,
• wherein the Formulae BF, CF, FF, and IF are prepared from epoxy resins BS, CS, FS, and IS, respectively,
• wherein in Formulae BS, CS, FS, and IS, at least three of the K's is an epoxy group of Formula E1, and the remaining are hydrogen,
• S in Formula BS is the same as in Formula BF except M in Formula BF is K as defined in Formula BS, and
• n in Formulae BF and CF is the same as in Formula BS and CS, respectively,
• OCN(CH2)3SiR1R2R3 [Formula B]
• where at least one of R1 to R3 is a C1-05 alkoxy group, and the others are C1-C10 alkyl groups.