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Priority to ES0268382ApriorityCriticalpatent/ES268382A3/en
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Process for the preparation of polyspirane resins, characterized in that a polystyrene resin is reacted with a polycarbonylic anhydride in free state or in combination with an organic material selected from the group comprising aliphatic polycarboxylic anhydrides, aromatic polycarboxylic anhydrides, polycyclic anhydrides alcyclic , substituted derivatives of the above compounds, polymerized polyanhydrides and combinations of the substances mentioned above. (Machine-translation by Google Translate, not legally binding)
ES0268382A1961-06-201961-06-20Procedure for the preparation of polyespiran resins (Machine-translation by Google Translate, not legally binding)
ExpiredES268382A3
(en)
Procedure for the preparation of hardened mixtures by heat of epoxy compounds and polycarbonylic anhydrids (Machine-translation by Google Translate, not legally binding)