Preparation method of polythiol compounds by ring open and the polythiol compounds, and the resin composition for optical material using it

摘要

The present invention relates to a polythiol compound, a method for preparing the polythiol compound, and a resin composition for a urethane-based optical material using the polythiol compound and, in particular, to a polythiol compound in which a chain is extended through ring-opening by adding a compound having terminal thiol group to a cyclic episulfide or thietane compound, a method for preparing the same, and a resin composition for an optical material using the polythiol compound. The optical material obtained using the polythiol compound (chemical formula 1) developed in the present invention enhances refractive index, has excellent heat resistance and reactivity, and can thus be used for optics related products including lens such as glasses lens and camera lens, prism, an optical pipe, an optical disk, a magnetic disk, a recording medium system, a colored filter, an infrared absorber filter, and other plastic processed products.