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Optical article including an antireflection coating having improved crack-resistance properties under mechanical stress

An anti-reflection coating and article technology, applied in the field of optical articles, can solve problems such as cracking and deformation of the anti-reflection layer

Active Publication Date: 2014-03-19
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The primer / abrasion resistant / anti-reflective coating system is then subjected to high mechanical stress, which leads to deformation of the anti-reflective layers up to cracking

Method used

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  • Optical article including an antireflection coating having improved crack-resistance properties under mechanical stress
  • Optical article including an antireflection coating having improved crack-resistance properties under mechanical stress
  • Optical article including an antireflection coating having improved crack-resistance properties under mechanical stress

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Experimental program
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example

[0115] 1) Crack resistance

[0116] 1.1) Preparation of primer composition

[0117] Prepare a primer composition from the following components in the following proportions:

[0118]

[0119] Half of the distilled water was added to the colloidal silica, and the mixture was stirred for 30 minutes. The latex dispersion is slowly added to this mixture, and then the surfactant and the other half of the water are added. The composition was stirred for 1 hour and then stored at a temperature of 5°C.

[0120] In the dry coating, the volume ratio of colloidal silica to polyurethane dispersion was 30 / 70.

[0121] Two further primer compositions were prepared according to the same procedure and starting from the same components, which differed from those described above only in that colloidal silica was dispersed with polyurethane in the dry coating The volume ratios of the bodies are 37 / 63 and 43 / 57, respectively.

[0122] Three additional primer compositions were prepared ...

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Abstract

The invention relates to an optical article including a transparent organic glass substrate, a primary coating including polyurethane and particulate silica, an abrasion-resistant coating, and an antireflection coating, said coatings, and in particular the antireflection coating, having improved crack resistance when the optical article is subjected to high amounts of mechanical stress, e.g., during edge-grinding and the mounting of lenses in eyeglass frames. The invention also relates to a method for manufacturing such an article.

Description

technical field [0001] The invention relates to an optical article, preferably an ophthalmic lens, comprising a transparent substrate made of organic glass, a primer coating comprising polyurethane and particulate silica, an abrasion-resistant coating and an antireflective Coatings; these coatings, in particular anti-reflective coatings, have improved resistance to cracking when the optical article is subjected to high mechanical stress, such as, for example, during the edging phase and during the mounting of the lens to the spectacle frame. The invention also relates to a method for the manufacture of such an article. Background technique [0002] In the field of ophthalmic optics, it is conventional to coat an ophthalmic lens with different coatings to impart different mechanical and / or optical properties on the lens. [0003] Thus, a primer coating, an abrasion-resistant coating and an anti-reflection coating can be applied successively to an ophthalmic lens (also referr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10
CPCG02B1/11G02B1/111G02B1/105Y10T428/259Y10T428/265Y10T428/31598G02B1/14
Inventor P·库埃A·库德瓦I·博内
Owner ESSILOR INT CIE GEN DOPTIQUE