Process for the manufacture of polyaddition products containing imide groups
AssigneeCiba-Geigy Corporation
InventorsAlbrecht Muller, Theobald Haug, Alfred Renner
Life of this patent
Estimating the term…
Abstract
According to the invention, polyaddition products containing imide groups are manufactured by reacting certain polyimides (preferably maleimides) with polyhydric alcohols in the presence of basic compounds. The preferred embodiment (E) relates to the use of catalysts as basic compounds. In particular, amines and alkali metal compounds can be used. A further embodiment (F) relates to the use of primary polyamines as basic compounds. In the latter case, the polyamine participates in the polyaddition mechanism, that is to say the molecules are incorporated into the polyaddition products. In this latter case, catalysts can also be used additionally.
Claims61
Process for the manufacture of polyaddition products containing imide groups, said process comprising reacting polyimides which contain, per molecule, at least two radicals of the general formula ##STR16## in which D denotes a divalent radical containing a carbon-carbon double bond, with polyhydric alcohols in the presence of basic compounds selected from the group consisting of primary polyamines, basic catalysts, and mixtures of primary polyamines and basic catalysts at temperatures between 50.degree. and 280.degree. C.
Storage-stable, hot-curable mixtures, said mixtures comprising a) polyimides which contain, per molecule, at least two radicals of the general formula ##STR26## in which D denotes a divalent radical containing a carbon-carbon double bond, b) polyhydric phenols and c) basic compounds selected from the group consisting of primary polyamines, basic catalysts, and mixtures of primary polyamines and basic catalysts.
Dependencies are inferred from the claim text.