Xylylene diisocyanate composition and optical composition comprising same
AssigneeSK Pucore Co., Ltd.
InventorsJae Young Pai, Jung Hwan Myung, Hyuk Hee Han, Kyeong Hwan You, Jeong Moo Kim, Eui Jun Choi, Jung Hwan Shin
Life of this patent
Estimating the term…
Abstract
A xylylene diisocyanate composition according to exemplary embodiments includes xylylene diisocyanate (XDI) and chloromethylbenzyl isocyanate (CBI), and may satisfy a predetermined relationship between an acidity and a content of CBI. Thereby, an optical lens having a high transmittance and improved optical uniformity can be manufactured by controlling a polymerization reaction rate.
Claims7
A xylylene diisocyanate composition, comprising xylylene diisocyanate (XDI) and chloromethylbenzyl isocyanate (CBI), and satisfying Equation 1 below,
- wherein a content of chloromethylbenzyl isocyanate ranges from 600 to 1,000 ppm based on a total weight of the composition, and
- wherein the xylylene diisocyanate composition has an acidity value in a range of 110 to 350 ppm,
- 400
- ≤
- (
- A
- 2
- )
- 2
- +
- (
- 2
- ×
- B
- )
- 2
- ≤
- 750
- ,
- [
- Equation
-
- 1
- ]
- in Equation 1, “A” is a content value of CBI in the XDI composition converted to ppm, “B” is an acidity value of the XDI composition converted to ppm, and A and B respectively represent numerical values in which the ppm unit is omitted.
An optical composition comprising:
- a xylylene diisocyanate composition comprising xylylene diisocyanate (XDI) and chloromethylbenzyl isocyanate (CBI), and satisfying Equation 1 below;
- and
- a polythiol-based compound,
- wherein a content of chloromethylbenzyl isocyanate ranges from 600 to 1,000 ppm based on a total weight of the composition, and
- wherein the xylylene diisocyanate composition has an acidity value in a range of 110 to 350 ppm,
- 400
- ≤
- (
- A
- 2
- )
- 2
- +
- (
- 2
- ×
- B
- )
- 2
- ≤
- 750
- ,
- [
- Equation
-
- 1
- ]
- in Equation 1, “A” is a content value of CBI in the XDI composition converted to ppm, “B” is an acidity value of the XDI composition converted to ppm, and A and B respectively represent numerical values in which the ppm unit is omitted.
An optical product, comprising:
- a copolymer of a xylylene diisocyanate composition and a polythiol-based compound,
- wherein the xylylene diisocyanate composition comprises xylylene diisocyanate (XDI) and chloromethylbenzyl isocyanate (CBI), and satisfies Equation 1 below,
- wherein a content of chloromethylbenzyl isocyanate ranges from 600 to 1,000 ppm based on a total weight of the composition, and
- wherein the xylylene diisocyanate composition has an acidity value in a range of 110 to 350 ppm,
- 400
- ≤
- (
- A
- 2
- )
- 2
- +
- (
- 2
- ×
- B
- )
- 2
- ≤
- 750
- ,
- [
- Equation
-
- 1
- ]
- (in Equation 1, “A” is a content value of CBI in the XDI composition converted to ppm, “B” is an acidity value of the XDI composition converted to ppm, and A and B respectively represent numerical values in which the ppm unit is omitted).
A method for preparing a xylylene diisocyanate composition, comprising:
- synthesizing xylylene diisocyanate (XDI) from xylylene diamine to form a preliminary composition including xylylene diisocyanate;
- and
- adjusting a content of chloromethylbenzyl isocyanate (CBI) and an acidity in the preliminary composition by a distillation process at a temperature of 110 to 135° C.,
- wherein the step of adjusting comprises controlling the distillation process so as to satisfy Equation 1 below,
- wherein a content of chloromethylbenzyl isocyanate ranges from 600 to 1,000 ppm based on a total weight of the composition, and
- wherein the xylylene diisocyanate composition has an acidity value in a range of 110 to 350 ppm,
- 400
- ≤
- (
- A
- 2
- )
- 2
- +
- (
- 2
- ×
- B
- )
- 2
- ≤
- 750
- ,
- [
- Equation
-
- 1
- ]
- in Equation 1, “A” is a content value of CBI in the XDI composition converted to ppm, “B” is the acidity value of the XDI composition converted to ppm, and A and B respectively represent numerical values in which the ppm unit is omitted.
Dependencies are inferred from the claim text.