Highly transparent plastic for optical materials

A transparent and plastic technology, used in optics, optical components, organic chemistry, etc., can solve the problem of failing to give the data of plastic Vicat temperature, and achieve improved wearing comfort, good impact toughness, and prevention of damage or inoperability. The effect of repaired damage

Inactive Publication Date: 2009-12-09
ROHM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these plastics are also only limitedly suitable for spectacle lenses
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Method used

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  • Highly transparent plastic for optical materials
  • Highly transparent plastic for optical materials
  • Highly transparent plastic for optical materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0294] 2 molar equivalents of TMDI (2,2,4- and 2,4,4-trimethylhexamethylene diisocyanate position isomer mixture (CAS-34992-02-4)) and thiomethyl in 81g 0.01-0.5% by weight DABCO in acrylate was weighed together and mixed to form a homogeneous solution.

[0295] At this point, 1 molar equivalent of 3,6-dioxa-1,8-octanedithiol was metered in at about 60-80° C. within 1 hour, followed by stirring at about 60-80° C. for 1 hour. This reaction step can also be carried out without a catalyst, if desired.

[0296] Subsequently, 2 molar equivalents of 2-hydroxyethyl methacrylate, a stabilizer (0.1% by weight of 4-methyl-2,6-di-tert-butylphenol), and again 0.01-0.5% by weight of The above-mentioned amines or tin compounds, such as dibutyltin laurate. The mixture was stirred at about 60-80°C for 1-5 hours.

[0297] The viscous casting resin was then injected into the mold and polymerized using 0.2 wt% AIBN.

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Abstract

The invention relates to mixtures which contain A) compounds of formula (I) and (II), wherein R respectively and individually means hydrogen or a methyl radical, R respectively and individually means a linear or branched aliphatic or cycloaliphatic radical or a substituted or unsubstituted aromatic or heteroaromatic radical, and m and n respectively and individually represent a whole number which is greater than or equal to 0 wherein m + n > 0, and B) at least one ethylenically unsaturated monomer (A) which is different from the compounds of formula (I) and (II). The invention also relates to methods for the polymerization of said mixtures, highly transparent polymers thus obtained, and the use thereof.

Description

[0001] This divisional application is a divisional application based on the Chinese patent application with the application number 03824115.3, the filing date is September 13, 2003, and the invention title is "High Transparency Plastics for Optical Materials". technical field [0002] The invention relates to the field of transparent plastics. In particular, the invention relates to highly transparent plastics which can be used for the production of optical lenses, especially ophthalmic lenses. Background technique [0003] Today, glasses have become everyday objects. Spectacles, in particular with plastic lenses, have recently gained attention because they are lighter and less brittle than spectacle lenses made of inorganic materials and can be dyed with suitable dyes. Plastic ophthalmic lenses are usually produced using highly transparent plastics, which can be made, for example, of diethylene glycol bis(allyl carbonate) (DAC), thiourethanes with α,ω-terminated multiple b...

Claims

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Application Information

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IPC IPC(8): C07C327/22C07C333/04C08F220/22C08L33/08G02B1/04C08F222/10C08G18/38C08G18/73C08G18/81
CPCC08G18/8175C08G18/73C08F222/1006C08G18/3876C07C327/22C08F236/20C08L75/12
Inventor B·施米特W·克莱西V·克斯彻P·哈特曼
Owner ROHM CO LTD
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