Resin lens with high impact resistance

A resin lens, high impact resistance technology, used in optics, instruments, optical components, etc., can solve the problems of low impact resistance, low Abbe number, poor impact strength, etc., to achieve improved impact resistance, high refraction rate effect

Inactive Publication Date: 2010-05-05
江阴市茂盛光学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractive index is about 1.49, which is lower than that of inorganic glass, and there is a disadvantage of thicker thickness when making high-number resin lenses.
In addition, the resin lens obtained by using PC has a high refractive index of about 1.58, but a low Abbe number of less than 29. In addition, PC is melt-molded, so there are problems in optical anisotropy and coloring.
[0004] Therefore, in order to improve the above-mentioned shortcomings, increase the refractive index, and a new optical material with a refractive index of the optical lens ≥ 1.55. Specifically, a lens made by Japanese Patent No. 53-7787 is made of diallyl isophthalate and polyester The weight ratio copolymer of diethylene glycol diallyl carbonate (85:15) has successfully obtained thinner resin lenses, but has problems such as poor impact strength
Both Japanese Patent 63-235901 and Japanese Patent Laid-Open No. 3-54213 disclose copolymers of diallyl terephthalate prepolymers, but these polymers have low impact resistance

Method used

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  • Resin lens with high impact resistance

Examples

Experimental program
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Effect test

example 1

[0026] Example 1, drop into isophorone diisocyanate 55.7g (0.25mol) and dibutyl tin dichloride 0.2g in a 250ml four-neck flask equipped with a thermometer, condenser, nitrogen inlet and stirrer, under nitrogen protection Heating to 50°C; adding 96.2g (0.5mol) of dimercaptomethylthioethane dropwise for 1 hour, and then aging at 60°C for 2 hours to obtain 152.1g of mercapto-terminated polythiourethanes The solution of the prepolymer; its refractive index n D 25 1.5753, viscosity η 25 80CP.

example 2

[0027] Example 2, drop into 55.7g (0.25mol) of isophorone diisocyanate (0.25mol) and 0.25g of dibutyl tin dichloride in a 250ml four-necked flask equipped with a thermometer, condenser, nitrogen inlet and stirrer, under nitrogen protection Heating to 50°C; adding 50.1 g (0.4 mol) of dimercaptoethylthiomethane dropwise for 1 hour, and then aging at 60°C for 2 hours to obtain 106.05 g of mercapto-terminated polythiourethane precursors Polymer solution; its refractive index n D 25 1.5690, viscosity η 25 55CP.

example 3

[0028] Example 3, 222.3g (1.0mol) of isophorone diisocyanate (IPDI) and 209.8g (0.8mol) of dicyclohexylmethane diisocyanate were fully stirred for 1 hour under nitrogen protection to obtain 432.1g of polyisocyanate-containing compounds The solution.

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PUM

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Abstract

The invention relates to a resin lens with high impact resistance, which is prepared by the steps of mixing the following raw materials by weight percent, then injecting the mixture into an injection mould and carrying out curing molding and quenching, wherein the raw materials comprise 5-15 of solution containing a sulfhydryl (-SH) terminated polythioester / polyurethane prepolymer, 50-60 of solution containing a polyisocyanate compound, 30-40 of poly-sulfhydryl compounds, 0.05-0.15 of ultraviolet absorbent and 0.05-0.15 of catalyst. The resin lens of the invention has the advantage that the impact resistance is improved while the resin lens has high refractive index and Abbe number.

Description

1. Technical field [0001] The invention relates to a resin lens, in particular to a resin lens with high impact resistance. 2. Background technology [0002] Resin lenses (plastic lenses) are lighter than inorganic glass, are less likely to break, and are easy to stain, so the popularity of resin lenses has been increasing rapidly in recent years. For optical materials, higher optical properties are gradually required, and the pursuit of high refractive index, high Abbe number, low specific gravity, high heat resistance, high impact, etc. So far, various resin materials for lenses have been developed and used. Among them, representative synthetic resins include polyethylene glycol diallyl carbonate (abbreviated as PADC), polymethyl methacrylate (PMMA), polycarbonate (PC) and the like. [0003] Resin lenses obtained by using PADC or PMMA are superior to inorganic glass in terms of low specific gravity, impact resistance, and dyeing. However, the refractive index is about 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04C08G18/38C08G18/65
Inventor 张建兴
Owner 江阴市茂盛光学材料有限公司
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