Dithiolene metal complex colorless IR absorbers

Patent metadata

Field	Value
Publication number	US-10112964-B2
Application number	US-201715837371-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Jan 17, 2007
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

The invention relates to the use of compounds of formulae (I) and/or (II) as colorless 1R absorbers wherein M is Ni, Pd, Pt, Au, Ir, Fe, Zn, W, Cu, Mo, In, Mn, Co, Mg, V, Cr or Ti, X 1 , X 2 and X 3 are each independently of the others sulfur or oxygen, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently of the others hydrogen, NR 7 R 8 , unsubstituted or substituted C 1 -C 18 alkyl, C 1 -C 18 alkyl wherein the alkylene chain is interrupted with oxygen, unsubstituted or substituted C 1 -C 18 alkenyl, unsubstituted or substituted aryl, unsubstituted or substituted arylalkyl or unsubstituted or substituted heteroarylalkyl, R 7 and R 8 , each independently of the other, being unsubstituted or substituted C 1 -C 18 alkyl, unsubstituted or substituted aryl, unsubstituted or substituted arylalkyl or unsubstituted or substituted heteroarylalkyl, a further IR absorber optionally being added to the compounds of formulae (I) and (II). The invention relates also to novel dithiolene compounds of formulae (I) and (II) wherein X 1 is oxygen and X 2 and X 3 are oxygen or sulfur. The invention relates furthermore to novel dithiolene compounds of formulae (I) and (II) wherein R 1 to R 6 are NR 7 R 8 .

First claim

The invention claimed is:

1. A method of using colorless IR absorbers comprising
a) treating a material with a compound from the group consisting of

wherein the material is a security print, an invisible and IR readable bar code,
a laser-welded plastic, a dried print, a fixed toner on paper, a laser marked plastic, or a heated preform,
optionally a further IR absorber; and
b) using the treated material of a) for security printing, invisible and IR readable bar codes, laser-welding of plastics, drying of print, fixing of toners on paper, laser marking, and heating of plastics preforms.

2. The method according to claim 1 , wherein step b) is using the treated material for laser-welding of plastics.

3. The method according to claim 1 , wherein step b) is using the treated material for security printing or producing invisible and IR readable bar codes.

4. The method according to claim 1 , wherein the further IR absorbers are polymethines.

5. A method of using colorless IR absorbers comprising
a) treating a material with a compound selected from the group consisting of

wherein the material is a security print, an invisible and IR readable bar code,
a laser-welded plastic, a dried print, a fixed toner on paper, a laser marked plastic, or a heated preform,
optionally a further IR absorber; and
b) using the treated material of a) for security printing, invisible and IR readable bar codes, laser-welding of plastics, drying of print, fixing of toners on paper, laser marking, and heating of plastics preforms.

6. The method according to claim 5 , wherein step b) is using the treated material for laser-welding of plastics.

7. The method according to claim 5 , wherein step b) is using the treated material for security printing or producing invisible and IR readable bar codes.

8. The method according to claim 5 , wherein the further IR absorbers are polymethines.

Assignees

• Basf Se

Inventors

• Lehmann Urs
• Heizler Daniel

Classifications

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• C07D233/86

  Oxygen and sulfur atoms, e.g. thiohydantoin · CPC title

• B29C35/0272

  using lost heating elements, i.e. heating means incorporated and remaining in the formed article (for preforms with internal stresses B29C61/0625; joining using lost heating elements B29C65/34; making electrically conductive articles B29C70/882) · CPC title

• B29K2077/00

  Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material · CPC title

• B29K2027/16

  PVDF, i.e. polyvinylidene fluoride · CPC title