Composition comprising 1,3,5-triazine, 2,4,6-tris[1,1'-biphenyl]-4-yl with lower amounts of impurities
AssigneeBASF SE
InventorsThomas EHLIS, Markus KNOBLOCH, Helmut KRONEMAYER, Ute HOPPE, Johannes Felix HAUS
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Abstract
A composition comprising 1,3,5-triazine, 2,4,6-tris[1,1′-biphenyl]-4-yl (TBPT) and a first impurity consisting of one or more halogen-comprising triazine and a second impurity consisting of biphenyl, wherein the amount of the first impurity is equal to or less than 900 ppm by weight with respect to the total weight of the composition, and wherein the amount of the second impurity is equal to or less than 4000 ppm by weight with respect to the total weight of the composition.
Claims17
-15. (canceled)
A composition comprising
- 1,3,5-triazine, 2,4,6-tris[1,1′-biphenyl]-4-yl (TBPT), and
- a first impurity consisting of one or more halogen-comprising triazines, and
- a second impurity consisting of biphenyl,
- wherein the amount of the first impurity is equal to or less than 900 ppm by weight with respect to the total weight of the composition, and
- wherein the amount of the second impurity is equal to or less than 4000 ppm by weight with respect to the total weight of the composition.
The composition according to claim 21, wherein the aromatic hydrocarbon is selected from the group consisting of monocyclic-aromatic hydrocarbons, polycyclic aromatic hydrocarbons (PAH), and mixtures thereof, preferably is selected from the group consisting of alkyl-substituted benzene compounds (Cn-benzenes), condensed aromatic hydrocarbons, and mixtures thereof.
A process for interconverting crystalline form B of 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine (TBPT) into crystalline form A of TBPT comprising the steps of:
- a) providing a composition CB comprising TBPT in crystalline form B;
- b) mixing the composition CB in a solvent (S1) to obtain a first mixture;
- c) stirring the first mixture at a temperature T1 for a time t1 and thereby obtaining TBPT in crystalline form A, and thereby providing a second mixture;
- and
- d) isolating a composition CA comprising TBPT in crystalline form A from the second mixture.
Dependencies are inferred from the claim text.