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Thio(meth)acrylates, mixtures for preparing transparent plastics, transparent plastics, and method for their production and use

A technology of acrylate and mixture, which is used in transparent plastics, ophthalmic lenses, and the production of optical lenses. It can solve the problems of unsatisfactory impact strength and achieve excellent adhesion, high refractive index, and low dispersion.

Inactive Publication Date: 2007-11-21
ROHM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of these lenses is that their mechanical properties
For example, impact strength in particular does not meet many requirements

Method used

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  • Thio(meth)acrylates, mixtures for preparing transparent plastics, transparent plastics, and method for their production and use
  • Thio(meth)acrylates, mixtures for preparing transparent plastics, transparent plastics, and method for their production and use
  • Thio(meth)acrylates, mixtures for preparing transparent plastics, transparent plastics, and method for their production and use

Examples

Experimental program
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Effect test

Embodiment

[0359] Synthesis of Thiomethacrylate Mixtures

[0360] 75.36 g of 1,2-ethanedithiol were weighed into an Erlenmeyerkolben with protective gas introduction and stirred, and 416.43 g of a 13% strength NaOH solution were added within 30 minutes at 25 to 30° C. , metered in under water cooling. A clear brownish solution formed.

[0361] 178.64 g of methacrylic anhydride and mercaptan sodium salt solution were subsequently metered in parallel at the desired metering temperature within 45 minutes into the previously charged and stirred ethyl acetate / water in the reaction flask. Here, if appropriate, protective gas is passed through the mixed batch. The contents of the flask were typically cooled by about 2°C at the start of the addition and a slightly exothermic reaction started after about 5-10 minutes, which meant subsequent cooling down accordingly to maintain the desired reaction temperature (35°C). After the addition had ended, the mixed batch was stirred for a further 5 min...

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Abstract

To inexpensively detect a change, which occurs in an image photographed by an imaging means, with low power consumption and by a small amount of storage capacity.An integrated circuit device 10 includes an image change detecting circuit 20 for time-sequentially receiving image data 12 which are photographed by the imaging means 110, detecting the change of the image, and generating a change detection signal. The image change detecting circuit 20 divides the image into one or a plurality of areas, and includes an integrating circuit 30 that integrates the pixel values of pixels belonging to each area by unit of one or the plurality of areas concerning the image data of the first and second images which are time-sequentially received, and holds the integrated values in cumulative registers 50, 60; and a change detection signal generating circuit 40 for comparing the integrated values of the corresponding areas in the first and second images held in the cumulative registers 50, 60, detecting existence of the change, and generating the change detection signal 14 when existence of the change is determined.

Description

technical field [0001] The present invention relates to thio(meth)acrylates and mixtures for the production of transparent plastics comprising these thio(meth)acrylates. The invention also relates to transparent plastics which can be produced from said mixtures, and to processes for their production. The invention also relates to the use of transparent plastics for the production of optical lenses, especially ophthalmic lenses. Background technique [0002] Glasses are now no longer indispensable in everyday life. Among them, spectacles with plastic lenses have recently received particular attention because they are lighter and less shatterable than spectacle lenses made of inorganic materials and can be colored with suitable dyes. For the production of plastic spectacle lenses, thiourethane compounds which can be formed, for example, from diethylene glycol bis(allyl carbonate) (DAC), with α,ω-terminated multiple bonds or sulfur-containing (formazol) are generally used. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/38G02B1/04
CPCG02B1/04C08L33/04C08F222/24C07C327/22C08L33/14C08F222/1006C08L41/00C08K5/38C08F222/1025C08L2666/04C08K11/00G02B1/041C08L2207/00
Inventor B·施密特J·克尼贝尔P·哈特曼
Owner ROHM CO LTD
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