Plastic lens

A plastic lens and lens technology, applied in glasses/goggles, optics, instruments, etc., can solve problems such as discoloration, inability to obtain sufficient effects, and lack of solubility

Inactive Publication Date: 2014-03-19
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, it is known to add a bluing agent or a blue dye in the production process, but the bluing agent or the blue dye sometimes has no solubility or sometimes changes color during polymerization due to the difference in the type of monomer, so that sufficient results cannot be obtained. Effect
[0005] In Patent Document 1, there is disclosed a lens manufacturing method in which an anthraquinone compound having a specific structure is added as a blue dye to a urethane-based resin, and the lens manufacturing method is limited to polyurethane-based resins. Resin lens, in addition, the transparency of the obtained lens is not suitable for all purposes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 22.88 g of 4,4'-diphenylmethane diisocyanate and 25.09 g of 1,6-hexamethylene diisocyanate were placed in a 500 ml eggplant-shaped bottle, and JP-506H (trade name, Chengbei Chemical Co., Ltd.) was added as a mold release agent. Industry Co., Ltd.) 0.20 g, 0.06 g of dimethyl tin dichloride as a polymerization catalyst, 1.00 g of SEESORB701 (trade name, manufactured by Shipro Chemical Co., Ltd.) as an ultraviolet absorber, and the following formula (1-1) The indicated compound 1,4-bis[(2,6-diethyl-4-methylphenyl)amino]anthracene-9,10-dione 0.8 mass ppm was continuously stirred at 50°C under nitrogen purge for 30 minute. When these were completely dissolved, 52.03 g of pentaerythritol tetrakis(2-mercaptoacetate) was blended and stirred under reduced pressure at 1.3 kPa for 20 minutes to prepare a mixture.

[0052] The mixture was injected into a lens mold with a central wall thickness of 2 mm after passing through a 1.0 μm PTFE membrane filter, and polymerized by a temper...

Embodiment 2

[0057] In Example 1, the compound 1,4-bis[(2,4,6-trimethylphenyl)amino]anthracene-9,10-dione represented by the following formula (1-2) was used instead of 1 , 4-bis[(2,6-diethyl-4-methylphenyl)amino]anthracene-9,10-dione, and a lens was obtained by the same procedure.

[0058] The obtained lens was colorless and transparent without substantially yellowing, and had a YI value of 1.41.

[0059] [chemical formula 4]

[0060]

Embodiment 3

[0080] Put 22.25 g of 4,4'-diphenylmethane diisocyanate, 15.74 g of 1,6-hexamethylene diisocyanate, and 11.44 g of isophorone diisocyanate into a 500 ml eggplant-shaped bottle, and add 0.20 g of JP-506H (trade name, manufactured by Johoku Chemical Industry Co., Ltd.), 0.06 g of dimethyl tin dichloride as a polymerization catalyst, 1.00 g of SEESORB701 (trade name, manufactured by Shipro Chemical Industry Co., Ltd.) as an ultraviolet absorber, 1.00 g of 2,6-di-tert-butyl-p-cresol as an antioxidant, the compound 1,4-bis[(2,6-diethyl-4-methylbenzene) represented by the above formula (1-1) base) amino] anthracene-9,10-dione 0.4 mass ppm, and stirred continuously for 30 minutes at 50° C. under nitrogen purge. When these were completely dissolved, 50.58 g of pentaerythritol tetrakis(2-mercaptoacetate) was blended and stirred under reduced pressure at 1.3 kPa for 20 minutes to obtain a mixture.

[0081] The mixture was poured into a lens mold with a central wall thickness of 2 mm af...

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PUM

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Abstract

A plastic lens characterized by containing a compound represented by formula (1) [wherein R1, R2 and R3 are each independently a hydrogen atom or a group selected from among alkyl groups having 1 to 8 carbon atoms].

Description

technical field [0001] The invention relates to a plastic lens. Specifically, it relates to a plastic lens that is extremely close to colorless and transparent and is suitable as a lens for eyeglasses. Background technique [0002] Plastic lenses made of optical resins with excellent transparency are used in a wide range of fields instead of inorganic glass lenses due to advantages such as light weight and excellent processability, and are particularly suitable as lenses for eyeglasses. [0003] In order to protect eyes from harmful ultraviolet rays, spectacle lenses are required to have ultraviolet absorbing ability, and ultraviolet absorbers are sometimes added when manufacturing spectacle lenses made of plastic materials. However, there is a problem that the plastic lens itself turns yellow due to the addition of the ultraviolet absorber. In addition, plastic lenses are also subject to yellowing due to heat treatment and other manufacturing processes, and various studie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/02G02B1/04
CPCG02B1/041C08L75/04C08L81/00
Inventor 伊藤伸介
Owner HOYA CORP
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