The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2024
Filed:
Jul. 08, 2019
Merck Patent Gmbh, Darmstadt, DE;
Beate Burkhart, Darmstadt, DE;
Miriam Engel, Darmstadt, DE;
Matthias Hengst, Aschaffenburg, DE;
Holger Heil, Frankfurt am Main, DE;
Manuel Hamburger, Mannheim, DE;
Christoph Leonhard, Otzberg, DE;
Gaelle Bealle, Heidelberg, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
The present invention relates to formulations comprising at least one hyper-branched polymer which contains 30 to 70 mol % of at least one hole-transporting recurring unit A, 5 to 30 mol % of least one branching recurring unit B, 5 to 30 mol % of at least one further recurring unit C and 5 to 40 mol % of least one end group E, where the recurring units A, B and C are different from one another, and at least one organic solvent, characterised in that the formulation has a viscosity of ≤25 mPas. The present invention furthermore relates to the corresponding hyperbranched polymers and to processes for the preparation thereof. The present invention additionally also relates to the use of the hyperbranched polymers according to the invention in electronic or opto-electronic devices, and to electronic or opto-electronic devices containing these polymers.