Compositions – Light transmission modifying compositions – Displaying color change
Reexamination Certificate
1999-11-19
2001-03-20
Tucker, Philip (Department: 1712)
Compositions
Light transmission modifying compositions
Displaying color change
C548S421000, C548S407000, C546S094000, C546S276700, C351S163000
Reexamination Certificate
active
06203729
ABSTRACT:
The present invention relates to novel [pyirole]naphthopyran-type compounds which have, in particular, photochromic properties. The invention also relates to photochromic compositions and photochromic ophthalmic articles (lenses for example) which contain said [pyrrole]naphthopyrans. The invention also covers the preparation of these novel [pyirole]naphthopyrans. The photochromic compounds are capable of changing colour under the influence of a poly- or mono-chromatic light (UV for example) and of returning to their initial colour when the luminous irradiation ceases, or under the influence of temperature and/or a poly- or monochromatic light different from the first.
The photochromic compounds find applications in various fields, e.g. for the manufacture of ophthalmic lenses, contact lenses, solar protection glasses, filters, camera optics or photographic apparatus optics or other optical devices and observation devices, glazing, decorative objects, bill elements or even for information storage by optical inscription (coding).
In the field of ophthalmic optics, and in particular the spectacles trade, a photochromic lens which comprises one or more photochromic compounds must have:
a high transmission in the absence of ultraviolets.
a low transmission (high colourability) under solar irradiation,
adapted coloration and discoloration kinetics,
a tint acceptable to the consumer (grey or brown preferably) with preferably a maintenance of the chosen tint during the coloration and the discoloration of the lens,
a maintenance of the performances, the properties, within a temperature range of 0-40° C.,
a significant durability, since these objectives sought after are sophisticated corrective lenses and therefore expensive.
These lens characteristics are in fact determined by the active photochromic compounds which they contain ; compounds which must furthermore be perfectly compatible with the organic or inorganic support which constitutes the lens.
Moreover, it is to be noted that obtaining a grey or brown tint may necessitate the use of at least two photochromes of different colours, i.e. having distinct maximal absorption wavelengths in the visible. This combination further imposes other requirements of the photochromic compounds. In particular, the coloration and discoloration kinetics of the (two or more) combined active photochromic compounds must be essentially identical. The same applies for their stability with time and also for their compatibility with a plastic or inorganic support.
Amongst the numerous photochromic compounds described in the prior art, benzopyrans or naphthopyrans may be cited which are described in patents or patent applications U.S. Pat. No. 3,567,605, U.S. Pat. No. 3,627,690, U.S. Pat. No. 4,826,977, U.S. Pat. No. 5,200,116, U.S. Pat. No. 5,238,981, U.S. Pat. No. 5,411,679, U.S. Pat. No. 5,429,744, U.S. Pat. No. 5,451,344, U.S. Pat. No. 5,458,814, U.S. Pat. No. 5,651,923, U.S. Pat. No. 5,645,767, U.S. Pat. No. 5,698,141, WO-A-95 05382, FR-A-2,718,447, WO-A-96 14596, WO-A-97 21698 which are of the reduced formula below:
The U.S. Pat. No. 5,651,923 notably claims the general structure below:
in which ring A, which is annelated with side ƒ, is a benzothieno-, benzofurano- or indolo-type heterocycle.
These compounds claim to satisfy the specifications defined sulpra. In reality, if these compounds really do have one or more of the basic properties sought after, such as a high transmission in the absence of ultraviolets and a high colourability under solar irradiation, none of the compounds described hitherto have the complete combination of the properties sought after which are necessary for the production of satisfactory articles. In particular, none of these compounds is intrinsically grey or brown and the necessity of using an additional photochrome in order to obtain one of these two tints does subsist.
In this context, it is to the credit of the inventors for having been interested in this type of naphthopyran as a base for developing novel photochromes, and for having discovered a novel family of molecules which have particularly advantageous photochromic properties.
Thus, the present invention relates to [pyrrole]naphtlhopyran compounds of formula (I)
in which:
R
1
and R
2
, which are identical or different, independently represent
a hydrogen,
a linear or branched alkyl group which comprises 1 to 12 carbon atoms,
a cycloallkyl group which comprises 3 to 12 carbon atoms,
an aryl or heteroaryl group which comprises in its basic structure 6 to 24 carbon atoms or 4 to 24 carbon atoms respectively and at least one heteroatom selected from sulphur, oxygen and nitrogen; said basic structure being optionally substituted with at least one substituent selected from
a halogen, and notably fluorine, chlorine and bromine,
a hydroxy group,
a linear or branched alkyl group comprising 1 to 12 carbon atoms,
a linear or branched alkoxy group comprising 1 to 12 carbon atoms,
a haloalkyl or haloalkoxy group corresponding to the (C
1
-C
12
) alkyl or alkoxy groups above respectively which are substituted with at least one halogen atom, and notably a fluoroalkyl group of this type,
a linear or branched alkenyl group comprising 2 to 12 carbon atoms, and notably a vinyl group or an allyl group,
an —NH
2
group,
an -NHR group, R representing a linear or branched alkyl group comprising 1 to 6 carbon atoms,
a
group, R′ and R″, which are identical or different, independently representing a linear or branched alkyl group comprising 1 to 6 carbon atoms, or representing together with the nitrogen atom to which they are bound a 5- or 7-membered ring which can comprise at least one other heteroatom selected from oxygen, sulphur and nitrogen, said nitrogen being optionally substituted with an R′″ group, which is a linear or branched alkyl group comprising 1 to 6 carbon atoms,
a methacryloyl group or an acryloyl group,
an aralkyl or heteroaralkyl group, the alkyl part of which is linear or branched and comprises 1 to 4 carbon atoms, and the aryl part of which has the same definition as that given supra for the aryl and 1heteroaryl group;
or
said two substituents R
1
and R
2
together form an adamantyl, norbornyl, fluorenylidene, di(C
1
-C
6
)alkylantlhacenylidene or spiro(C
5
-C
6
)cyclo-alkylanthracenylidene group; said group being optionally substituted with at least one of the substituents listed above for R
1
, R
2
: an aryl or heteroaryl group;
R
3
represents
a methyl group,
a CR
5
R
6
OR
7
group in which:
R
5
and R
6
, which are identical or different, represent independently, hydrogen or a linear or branched alkyl group, which comprises 1 to 6 carbon atoms,
R
7
represents
hydrogen,
a linear or branched alkyl group which comprises 1 to 6 carbon atoms,
an aralkyl group, the alkyl group comprising 1 to 3 carbon atoms and the aryl group is selected from a phenyl or naphthyl group optionally substituted with at least one of the substituents listed above for R
1
, R
2
: an aryl or heteroaryl group,
a CH
2
CN group,
a CH
2
COOR
8
group in which R
8
represents a hydrogen or a linear or branched alkyl group which comprises 1 to 6 carbon atoms,
a COR
9
group in which R
9
represents a linear or branched alkyl group which comprises 1 to 6 carbon atoms, a cycloalkyl or bicycloalkyl group which comprises 3 to 12 carbon atoms, a phenyl or naphthyl group optionally substituted with at least one of the substituents listed above for R
1
, R
2
: an aryl or heteroaryl group,
a —COR
10
, —COORS, or CONHR
10
group, R
10
representing a linear or branched alkyl group comprising 1 to 6 carbon atoms, or a cycloalkyl group comprising 3 to 6 carbon atoms, or a linear or branched alkenyl group which comprises 2 to 12 carbon atoms, and notably an allyl group, or a phenlyl or benzyl group which is optionally substituted with at least one of the substituents listed above for the definition of R
1
, R
2
: an aryl or heteroaryl group;
R4 represents
hydrogen,
a linear or branched alkyl group which comprises 1 to 12 carb
Corning S.A.
Nwaneri Angela N.
Rogalskyj Peter
Tucker Philip
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