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Polythiol composition for plastic optical lens

A technology of polymeric composition and polythiol, which is applied in optics, optical components, optical components, etc., can solve the problems of increased pulsation, rapid viscosity rise, etc., and achieve the effect of preventing pulsation

Active Publication Date: 2019-04-05
AISIKAI CORE POLYURETHANE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the compound containing the above-mentioned hydrogen-bonding functional group is used in excess, the viscosity rises too quickly, and the pulsation will increase instead.

Method used

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  • Polythiol composition for plastic optical lens
  • Polythiol composition for plastic optical lens
  • Polythiol composition for plastic optical lens

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0070] Synthesis example 1: Preparation of polythiol compound

[0071]

[0072] Put 187.5 grams (2.04 moles) of thioglycolic acid, 63.0 grams (0.46 moles) of pentaerythritol, 0.8 grams of p-toluenesulfonic acid, and 469.0 grams of toluene into a mechanical Stirrer, Dean-Stark containing a cooling tube, a thermometer connected to a temperature regulator, and a heater reactor, and stirred for 60 minutes, and then reacted at 130° C. for 8 hours. At this time, a nitrogen pipe was installed inside the reactor, and nitrogen gas was continuously injected to remove water generated during the reaction inside the reactor, thereby inducing the reaction to a positive reaction. At this time, the amount of water removed was 98.9% of the theoretical amount. Then, the temperature was lowered to room temperature, and alkali washing, acid washing, and water washing were sequentially performed to obtain an organic layer. The obtained organic layer was heated to remove the solvent under redu...

Synthetic example 2

[0074] Synthesis example 2: Preparation of polythiol compound

[0075]

[0076] Except having used 147.3 g (1.60 mol) of thioglycolic acid, 66.0 g (0.48 mol) of pentaerythritol, and 491.3 g of toluene, it carried out by the method similar to the said synthesis example 1. The amount of water removed during the above reaction was 98.5% of the theoretical amount.

[0077] As a result of the above reaction, 200.6 g of a polythiol composition having a main component of the polythiol compound represented by the above chemical formula 6 was obtained. As a result of analyzing the composition obtained above by the absolute calibration curve method, it contains 79% by weight of the polythiol compound represented by the above chemical formula 6, 20% by weight of the polythiol compound represented by the above chemical formula 4, except for the above chemical formula 4 and 1% by weight of other oligomer compounds other than 6.

Synthetic example 3

[0078] Synthesis Example 3: Preparation of polythiol compound

[0079]

[0080] In addition to 3-mercaptopropionic acid (3-mercaptopropionic acid) 193.5g (1.82mol), pentaerythritol 56.4g (0.41mol), p-toluenesulfonic acid (p-toluenesulfonic acid) 0.7g and toluene 420.0g into the reactor Otherwise, it was carried out in the same manner as in Synthesis Example 1 above. The amount of water removed during the above reaction was 99.0% of the theoretical amount.

[0081] As a result of the above reaction, 202.2 g of a polythiol composition having a main component of the polythiol compound represented by the above chemical formula 5 was obtained. As a result of analyzing the composition obtained above by the absolute calibration curve method, it contains 78% by weight of the polythiol compound represented by the above chemical formula 5, 2% by weight of the polythiol compound represented by the above chemical formula 7, except for the above chemical formula 5 and 20% by weight of...

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Abstract

An embodiment relates to a polythiol composition for plastic optical lens and a polythiourethane-based plastic optical lens obtained from the same. The embodiment uses a reasonable content of: a firstpolythiol compound having only a mercapto group for an ester group and a hydrogen-linkable functional group; and a second polythiol compound having a hydrogen-linkable functional group except for themercapto group, thereby controlling a viscosity of an initial polymerizing composition at the low temperature between 5-15 DEG C and preventing an occurrence of striae, air bubbles and the like by stabilizing the viscosity increasing velocity and the polymerization velocity of the composition. In addition, various plastic lenses such as lenses of eyeglasses, camera and the like having excellent appearance characteristic (striae X, air bubble X) and optical characteristic can be obtained from the composition.

Description

technical field [0001] The embodiment relates to a polythiol composition for plastic optical lenses and a polythiourethane-based plastic optical lens obtained therefrom. Background technique [0002] Compared to optical materials made of inorganic materials such as glass, optical materials made of plastic are lighter, less fragile, and have excellent dyeability. Therefore, plastic materials made of various resins are widely used as optical materials such as eyeglass lenses and camera lenses. As the demand for higher performance and convenience has increased in recent years, research on optical materials with characteristics such as high transparency, high refractive index, low specific gravity, high heat resistance, and high impact resistance is continuing. [0003] Polythiourethane compounds are widely used as optical materials because of their excellent optical properties and mechanical and physical properties. Polythiourethane compounds are prepared by reacting polythiol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/52C08G75/04G02B1/04
CPCC08G18/52C08G75/04G02B1/041C08G18/73C08G18/752C08G18/755C08G18/7621C08G18/246C08G18/38G02B3/00B29L2011/0016B29K2081/00B29C33/62C08G18/3876B29D11/00009C08L75/04C08L81/00C07C323/52C08G18/775G02B1/04B29D11/00C08G18/3206C08G18/758
Inventor 沈钟珉洪承模徐贤明慎政焕
Owner AISIKAI CORE POLYURETHANE CO LTD
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