The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 1985
Filed:
Jan. 06, 1984
Friedrich Stockinger, Holstein, CH;
Theobald Haug, Frenkdendorf, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Phenol-novolaks containing amino groups of formulas VI and VII ##STR1## wherein R.sup.1 is halogen, nitro, alkyl, alkoxy or phenyl, R.sup.2 is hydrogen, alkyl, cycloalkyl, phenyl or furfuryl, R.sup.3 is hydrogen or alkyl, R.sup.4 and R.sup.5 independently are alkyl, halogen, nitro or cyano, and x is 1 to 8, are obtained by reacting the corresponding phenol-novolak with an aldehyde or ketone of formula II ##STR2## and with a substituted aniline of formula III or IV ##STR3## in a molar ratio of 1 mol of phenol-novolak to 2 mols of compound of formula II and to 2 mols of compound of formula III or IV in an acid medium at a pH value of 0.5 to 3.0. The phenol-novolaks containing amino groups are useful curing agents for epoxy resins and are also suitable as starting compounds for the preparation of epoxy resins.