Dicarboxylic compounds having 2,4-quinazolinedione rings and polyester resins derived therefrom
AssigneeInstitut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
InventorsChoua Cohen, Bruno Durif-Varambon, Robert Salle, Bernard Sillion
Life of this patent
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Abstract
A dicarboxylic compound complying with one of the general formulae: ##SPC1## In which R is a divalent radical selected from the aliphatic, alicyclic and aromatic radicals, the aliphatic containing 1-20 carbon atoms and the other containing from 5 to 20 carbon atoms, R.sup.1 is selected from the hydrogen atom and the alkyl and cycloalkyl groups containing from 1 to 10 carbon atoms and R.sup.2 is selected from the alkyl and cycloalkyl groups containing from 1 to 10 carbon atoms, the polyester resins derived therefrom being usable as enamelling composition, particularly for coating metal wires.
Claims19
A polyester resin which is the reaction product resulting from condensation of a polycarboxylic component with a polyhydroxyl component, in which said polycarboxylic component comprises, expressed as carboxylic equivalents,
- from 10 to 100% of at least one dicarboxylic heterocyclic compound of the formula ##SPC12##
- in which R is an aromatic radical of 5-20 carbon atoms, R.sup.1 is a hydrogen atom or an alkyl or cycloalkyl radical of 1-10 carbon atoms and R.sup.2 is an alkyl or cycloalkyl radical of 1-10 carbon atoms,
- from 0 to 90% of at least one polycarboxylic aromatic compound, and
- from 0 to 10% of at least one aliphatic dicarboxylic compound;
- and in which said polyhydroxyl component comprises, expressed as hydroxyl equivalents,
- from 50 to 100% of at least one polyol containing at least three hydroxyl functions, and
- from 0 to 50% of at least one aliphatic or cycloaliphatic diol;
- said polycarboxylic component and polyhydroxyl component being involved in such proportions that the ratio of the sum of the hydroxyl functions to the sum of the carboxylic functions is greater than 1.
Dependencies are inferred from the claim text.