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Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
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Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Priority to ES217132ApriorityCriticalpatent/ES217132A1/en
Publication of ES217132A1publicationCriticalpatent/ES217132A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Procedure for obtaining new high molecular weight polyureas, characterized in that the compounds of the formula h2 nr-nh2 or h2 n - (- r-nhconh -)n -r-nh2 where n means a number such that the molecular weight does not exceed 4000 are treated with compounds that by reaction with 2 primary amino groups form the grouping of urea -nh-co-nh-forming polyureas of the formula (-r-nh-co-nh -)n where r represents a residue of the formula -ph- or -ph- x-ph- substituted by a free or esterified sulfonic group and in which -ph- means a phenyl residuex a member serving as a bridge and n a number such that the molecular weight of the composition is greater than 4000 and within the composition any residue r it is attached to another ureo group or to a libreasi amino group as its salts and if the acids obtained are transformed into its salts. (Machine-translation by Google Translate, not legally binding)
ES217132A1954-08-261954-08-26A procedure for the obtaining of new polyuries (Machine-translation by Google Translate, not legally binding)
ExpiredES217132A1
(en)
Procedure for the preparation of substitute 3,5-dioxo-tetrahydr-1,2,6-tiadiazin-1,1-dioxides (Machine-translation by Google Translate, not legally binding)