ES234662A1 - Procedure for the preparation of an aniline-formaldehyde resin (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of an aniline-formaldehyde resin (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Novartis AG
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Ciba Geigy AG
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Publication of ES234662A1publicationCriticalpatent/ES234662A1/en
Process for the preparation of an aniline formaldehyde resin, by condensation of aniline with formaldehyde in aqueous acidic medium, characterized in that one mole of aniline is heated at a temperature below 60ºC with less than one mole of formaldehyde, in the absence of organic solvents, and because then the product, released from non-transposed, washed and dried aniline, provided that it does not already have the content of primary amino groups, is heated to approximately melting temperature for the time necessary to obtain a product with a lower melting point. (Machine-translation by Google Translate, not legally binding)
ES0234662A1956-04-041957-04-03Procedure for the preparation of an aniline-formaldehyde resin (Machine-translation by Google Translate, not legally binding)
ExpiredES234662A1
(en)
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