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Polymerizable composition for polythiourethane-based optical material

A technology of polymeric composition and optical material, which is applied in optics, optical components, optical components, etc., can solve problems such as changes and quality control difficulties, and achieve the effect of low yellowness index and uniform refractive index

Active Publication Date: 2019-04-02
SKC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of nitrogen-containing compounds varies even when the method of preparing polythiols is the same, leading to difficulties in quality control

Method used

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  • Polymerizable composition for polythiourethane-based optical material
  • Polymerizable composition for polythiourethane-based optical material
  • Polymerizable composition for polythiourethane-based optical material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 50.7 parts by weight of m-xylene diisocyanate, 0.01 parts by weight of dibutyltin dichloride as a curing catalyst, 0.1 parts by weight of an internal release agent (manufacturer: Stepan, product name: UN, acidic alkyl phosphate release agent), 0.05 parts by weight of UV absorber (2-(2'-hydroxy-5'-tert-octylphenyl)-2H-benzotriazole, manufacturer: Cytec, product name: UV-5411) and 0.5 parts by weight of phosphoric acid were mixed at 25°C to obtain a mixture, 49.3 parts by weight of polythiol B was added to the mixture, and then uniformly mixed again to prepare a polymerizable composition.

[0053] Polythiol B is bis(2-(2-mercaptoethylthio)-3-mercaptopropyl)sulfide represented by the following formula 1, and HPLC measurement under the following measurement conditions showed a high content of nitrogen-containing compound, and the peak area of ​​the nitrogen-containing compound (B) / the peak area of ​​the polythiol compound (A) was 7.8%.

[0054] In addition, the results ...

Embodiment 2-4 and comparative example 1-3

[0065] A polymerizable composition was prepared in the same manner as in Example 1 except for using the components and contents (parts by weight) shown in Table 1 below.

[0066] [Table 1]

[0067]

[0068] Polythiol A is bis(2-(2-mercaptoethylthio)-3-mercaptopropyl)sulfide represented by the above formula 1, and HPLC measurement under the same conditions as in Example 1 showed that B / A The percentage is 1.9%. In addition, ICP analysis showed that polythiol A contained 1.0 ppm of Ca, 1.1 ppm of Mg, 1.2 ppm of K and 1.7 ppm of Na.

[0069] Polymercaptan C is bis(2-(2-mercaptoethylthio)-3-mercaptopropyl) sulfide represented by the above formula 1, and HPLC measurement under the same measurement conditions as in Example 1 showed that B / A percentage is 2.8%. In addition, ICP analysis revealed that polythiol C contained 1.3 ppm Ca, 1.7 ppm Mg, 1.8 ppm K and 621 ppm Na, a high Na cation content.

experiment example

[0070] Experimental Example: Measurement of Physical Properties

[0071] The physical properties of the polymerizable compositions prepared in Examples 1-4 and Comparative Examples 1-3 were measured as follows, and the measurement results are shown in Table 2 below.

[0072] (1) Viscosity

[0073] After leaving the polymerizable composition at 25°C for 8 hours, the viscosity was measured at 25°C using a rotational viscometer.

[0074] (2) Yellowness index and light fastness (ΔYI)

[0075] The polymerizable compositions prepared in Examples 1-4 and Comparative Examples 1-3 were degassed at 600 Pa for 1 hour, and then filtered in a 3 μm Teflon filter. The filtered polymerizable composition was injected into a glass mold assembled by adhesive tape. The temperature of the mold was raised from 25°C to 120°C at a rate of 5°C / min, and polymerization was carried out at 120°C for 18 hours. The resin cured in the glass mold was further cured at 130° C. for 4 hours, and then the ...

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Abstract

Embodiments relate to a polymerizable composition for a polythiourethane-based optical material, the polymerizable composition enabling a high-quality polythiourethane-based optical material to be produced without complicated purification processes, by comprising a certain additive and appropriately adjusting the reactivity of isocyanate such that the viscosity can be maintained to be low for a certain period of time. In addition, the polythiourethane-based optical material of the embodiments has not only a uniform refractive index but also a low yellow index, and thus can be usefully used forvarious plastic optical lenses such as lenses for eyeglasses, camera lenses, etc.

Description

technical field [0001] Embodiments of the present invention relate to polymerizable compositions for polythiourethane-based optical materials, and polythiourethane-based optical materials prepared therefrom. Background technique [0002] Compared with optical materials composed of inorganic materials such as glass, plastic-based optical materials are lightweight, have good dyeing properties, and are not easily broken. Therefore, plastic materials of various resins are widely used as optical materials for spectacle lenses, camera lenses, and the like. In recent years, as the demand for higher performance and convenience has increased, research has been conducted on optical materials with properties such as high transparency, high refractive index, high Abbe number, low specific gravity, high heat resistance, high impact resistance, etc. Still going on. [0003] An example of a widely used optical material is a polythiourethane compound obtained by polymerizing a polythiol-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/52C07C321/14C08G18/50C08K5/521G02B1/04G02C7/02C08G18/38C08L75/04
CPCC07C321/14C08K5/521C08L75/04G02B1/04G02C7/02C08G18/341C08G18/281C08G18/3876C08G18/246C08G18/7642C08G18/3855C08G18/5072C08G18/5075C08G18/52G02B1/041G02C7/022C08G18/5084C08L2201/08
Inventor 洪承模明正焕徐贤明慎政焕
Owner SKC CO LTD
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