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AssigneeBASF Lacke + Farben, AG
InventorsRainer Blum, Manfred Schwarz, Gerhard Hoffmann
Estimating the term…
Solutions of polyimide-forming substances contain A) polyamines and B) amides and/or esters of tetracarboxylic acids, the amido or ester groups carrying substituents selected from the group consisting of carboxyl, sulfo and silicon-containing groups, and are used as polyimide coatings.
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A solution of a polyimide-forming substance, containing
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
Preparatory processes: from tetracarboxylic acids or derivatives and diamines
Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors:…
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
Coating compositions
Term ended 11 Oct 2014 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to solutions of polyimide-forming substances, containing
A) polyamines and
The technically most important polyheterocycles for the purposes of the present invention are polyimides, but other polyheterocycles, such as polyisoindoloquinazolinediones or polyarylenebenzimidazoles, are also included. The term polyimide is used below as a synonym for all N-containing polyheterocycles.
The individual components of the solutions are described below.
Preferred polyamine components A) are aromatic and/or partly aromatic polyamines, diamines, very particularly aromatic diamines, being preferred.