Altana Electrical Insulation Gmbh

Guenter Stevens

Piotr Penczek

Heinz Herlinger

Elzbieta Wardzinska

Giovanna Biondi

Process for the preparation of polyamidoimide resins, in which the centers of the polyamidoimide resins which are reactive toward moisture are reacted with one or more compounds of the following general H&#x2014;X&#x2014;R, in which, where X=oxygen, Ris a straight-chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aralkyl group and, where X&#x2550;NR, Ris a straight-chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aralkyl group or an aryl group and Ris a straight-chain or branched alkyl group having 1 to 6 carbon atoms, an aralkyl group or an aryl group, or Rand Rtogether form a cycloalkyl radical having 4 or 5 methylene groups, it being possible for a methylene group to be replaced by oxygen or an NRgroup, and Rbeing a straight-chain or branched alkyl group having 1 to 3 carbon atoms, and polyamidoimide coating materials which are prepared by the process.

Process for the preparation of storage-stable polyamidoimide resins and coating materials which contain them

The invention relates to wire enamels based on polyester, polyesterimide, polyesteramidoimide and/or polyurethane resins, which contain one or more of said resins as binders, and organic solvents and optionally diluents. At least 50% by weight of the solvent or of the solvent/diluent mixture consists of a monocyclic aromatic alkyl-carboxylic acid ester or isophorone or of a mixture of methyl benzoate and isophorone.

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Kempen, Germany

Guenter Stevens