Patent ID: 7964747

Claim:
A method of manufacturing a polysilsesquioxane spherical particle containing a UV absorbing group, the method comprising: (i) preparing a silsesquioxane precursor (A) containing the predetermined UV-absorbing group; (ii) adding a surfactant to a predetermined solvent; and (iii) reacting the silsesquioxane precursor (A) prepared in the step (i) with a compound (B) or its oligomer (B′) of a following Chemical Formula 1 under the predetermined solvent by means of a catalyst or a co-polymerization precursor to prepare a polysilsesquioxane spherical particle containing a UV-absorbing group: wherein R 1 is selected from the group consisting of hydrogen, an alkyl group, an aminoketyl group, an aryl group, an aminoalkylaminoalkyl group, an aminoalkyl group, an aminocycloalkyl group, an aminoalkenyl group, an aminocycloalkenyl group and an aminoallyl group; n is an integral number of 1 to 3; R 2 , R 3 and R 4 are selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group and an aryl group and wherein the silsesquioxane precursor (A) is at least one material selected from the group consisting of trimethoxysilylpropylbenzamide, N-trimethoxysilylpropyl-p-methoxycinnamamide and trimethoxysilylpropylcinnamamide.