Xylylenediisocyanate composition and optical polymerizable composition comprising same
AssigneeSK Pucore Co., Ltd.
InventorsJae Young Pai, Jung Hwan Myung, Kyeong Hwan You, Hyuk Hee Han, Jeong Moo Kim, Eui Jun Choi, Jung Hwan Shin
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Abstract
A xylylene diisocyanate (XDI) composition according to exemplary embodiments includes xylylene diisocyanate and an acidity regulator having a boiling point of 110° C. or higher, and the composition has an acidity of greater than 100 ppm and 1,000 ppm or less based on a total weight of the xylylene diisocyanate (XDI). An optical lens having a high transmittance and improved optical uniformity can be manufactured by controlling a polymerization reaction rate through acidity adjustment.
Claims8
A xylylene diisocyanate composition, comprising:
- xylylene diisocyanate (XDI);
- and an acidity regulator,
- wherein the xylylene diisocyanate composition has an acidity of greater than 100 ppm and 1,000 ppm or less based on a total weight of the xylylene diisocyanate (XDI),
- wherein a chlorine content of the xylylene diisocyanate composition is less than 100 ppm,
- wherein the chlorine content of the xylylene diisocyanate composition is measured using a sample combustion apparatus and ion chromatography, and
- wherein the acidity regulator comprises at least one compound selected from the group consisting of:
- an inorganic acid compound including halogen acids, sulfuric acid and phosphoric acid;
- an organic acid compound including trifluoroacetic acid (TFA) and fatty acid;
- a solid acid including clay, cation exchange resin, acid-impregnated silica gel, acid-impregnated alumina and vanadium oxide;
- a cyclic amine compound;
- and
- a tertiary amine compound, and
- wherein an acidity variation before and after 3 months storage of the xylylene diisocyanate composition in a dark room at 25° C. is 40 ppm or less.
A method for preparation of a xylylene diisocyanate composition, the method comprising:
- synthesizing xylylene diisocyanate from xylenediamine to form a preliminary composition including xylylene diisocyanate;
- adjusting an acidity of the preliminary composition to a range of greater than 100 ppm to 1,000 ppm based on a total weight of the xylylene diisocyanate by using an acidity regulator,
- wherein the xylylene diisocyanate composition is prepared to have a chlorine content of less than 100 ppm by changing a distillation temperature of the xylylene diisocyanate composition in the synthesizing, and
- wherein the chlorine content of the xylylene diisocyanate composition is measured using a sample combustion apparatus and ion chromatography,
- wherein the acidity regulator comprises at least one compound selected from the group consisting of:
- an inorganic acid compound including halogen acids, sulfuric acid and phosphoric acid;
- an organic acid compound including trifluoroacetic acid (TFA) and fatty acid;
- a solid acid including clay, cation exchange resin, acid-impregnated silica gel, acid-impregnated alumina and vanadium oxide;
- a cyclic amine compound;
- and
- a tertiary amine compound, and
- wherein an acidity variation before and after 3 months storage of the xylylene diisocyanate composition in a dark room at 25° C. is 40 ppm or less.
Dependencies are inferred from the claim text.