摘要:
The present invention relates to specific photochromic phenanthropyrans as well as to their use in synthetic resin materials of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic compounds derived from 2H-phenanthro[2,1-b]pyrans and 3H-phenanthro[3,4-b]pyrans, which in the open form have especially long wavelength absorption maxima, but in the unexcited state are still colorless.
摘要:
The present invention relates to photochromic 2H-naphtho[1,2-b]pyrans as well as their use in synthetic resins of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic naphthopyran compounds, for which a further ring system is bonded to the f side of the naphthopyran. The inventive photochromic dyes generally have the general formula (I) wherein n, R1, R2, R3, X, B and B′ are defined as in claim 1. The inventive compounds are distinguished by good darkening and decolorizing properties and a very good service life.
摘要:
The present invention relates to specific photochromic heterocyclically annellated indenochromene derivatives and the use thereof in plastics of all types, particularly for ophthalmic applications. In particular, the present invention relates to indeno[1,2-h]chromene derivatives having the following general formula (I) and indeno[2,1-f]chromene derivatives having the following general formula (II):
摘要:
A neutral-color gray photochromic synthetic resin article which remains almost completely color-neutral or gray both during darkening as well as during fade. The synthetic resin article according to the invention may be employed as a neutral-color gray photochromic ophthalmic lens.
摘要:
The present invention relates to specific photochromic h-annellated benzo[f]chromene derivatives and their use in synthetic resins of all types, especially for ophthalmic applications. In particular, the present invention relates to photochromic compounds derived from benzo[f]chromenes, which in the open form have especially long-wave absorption maxima making it possible to obtain violet to blue tints when used in phototropic glasses.
摘要:
The present invention relates to photochromic 2H-naphtho[1,2-b]pyrans as well as their use in synthetic resins of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic naphthopyran compounds, for which a further ring system is bonded to the f side of the naphthopyran. The inventive photochromic dyes generally have the general formula (I) wherein n, R1, R2, R3, X, B and B′ are defined as in claim 1. The inventive compounds are distinguished by good darkening and decolorizing properties and a very good service life.
摘要:
What is described here are photochromic naphthopyrane dyes with different substituents whose properties can be set by controlled selection of the substituents. In this manner it is possible to take an influence on the migration characteristics, the absorption characteristics and the brightening rate and kinetics. The inventive compounds display good darkening and brightening properties at a very good service life.The invention excels itself by the fact that a method is made available which is substantially improved over prior art, in addition to the surprising influence on specific properties of the inventive compounds. The described compounds are suitable for application in synthetic materials of any kind.A photochromic object is also the subject matter of the invention, which comprises one or several photochromic naphthopyrane dyes as well as at least one polymer material, with the photochromic object being producible by mass-dyeing or superficial dyeing.
摘要:
Photochromic 3H-naphtho[2,1-b]pyran compounds corresponding to formula I in which the groups R1 to R7 and B′ have defined meanings and the use of such photochromic compounds in synthetic resin articles of all types, particularly for ophthalmic purposes. The photochromic 3H-naphtho[2,1-b]pyran derivatives have particularly long-waved absorption maxima in the open form, and when used in photochromic eyeglass lenses, produce essentially blue color tones which have a high darkening capacity.
摘要:
The present invention relates to specific photochromic heterocyclically annellated indenochromene derivatives and the use thereof in plastics of all types, particularly for ophthalmic applications. In particular, the present invention relates to indeno[2,1-f]chromene derivatives having the following general formula (I) and indeno[1,2-h]chromene derivatives having the following general formula (II):
摘要:
A neutral-colored gray photochromic plastic article which remains almost completely color-neutral or gray both during darkening as well as during bleaching. The plastic article according to the invention may be employed as a neutral-color gray photochromic ophthalmic lens.