Squarylium and croconylium dyes

Details Squarylium and croconylium dyes Squarylium and croconylium dyes

C - Chemistry, Metallurgy

09

B

C09B 23/12 (2006.01) B41M 5/30 (2006.01) B41M 5/46 (2006.01) C07D 311/22 (2006.01) C07D 405/04 (2006.01) C07D 413/04 (2006.01) C09B 57/00 (2006.01) C09B 57/02 (2006.01) G11B 7/24 (2006.01) G11B 7/244 (2006.01) B41M 5/26 (2006.01) B41M 5/40 (2006.01)

Patent

CA 2070280

-87- ABSTRACT Dyes comprising an inner salt of a compound of the formula: Q1=Z-Q2 wherein: Q1 is a 4-(benz[b]-4H-pyrylium)methylidene, 4-(benz[b]-4H-thiopyrylium)methylidene or 4-(benz[b]- 4H-selenopyrylium)methylidene grouping; Z is a 1,3-(2-hydroxy-4-oxo-2-cyclobutylidene) hydroxide or 1,3-(2-hydroxy-4,5-dioxo- -2-cyclopentylidene) hydroxide ring; and Q2 is a 4-(benz[b]-4H-pyran-4-ylidene)methyl, 4-(benz[b]-4H-thiopyran-4-ylidene)methyl or 4-(benz[b]- -4H-selenopyran-4-ylidene)methyl grouping; wherein at least one of the groupings Q1 and Q2 carries at its 2-position a substituent in which a non-aromatic carbon atom- is bonded directly to the benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus, subject to the proviso that if this 2-substituent contains an aromatic nucleus, this aromatic nucleus is not conjugated with the benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus to which it is attached, are useful as visible and near infra-red absorbers, having high extinction coefficients and improved solubility in polymeric media.

Affiliated with

Also associated with

Rating

Squarylium and croconylium dyes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Squarylium and croconylium dyes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Squarylium and croconylium dyes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1505626