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:
Mar. 17, 1992
Filed:
Nov. 08, 1989
Wolfgang Hesse, Taunusstein, DE;
Erhardt Leicht, Hofheim am Taunus, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
Cationic modification products of novolaks which contain bridging bonds, originating from at least bifunctional epoxide compounds, between the phenolic hydroxyl groups of the starting novolak and the nitrogen atoms of an originally secondary or primary amine and if appropriate additional bridging bonds between phenolic hydroxyl groups and/or between the nitrogen atoms of the amine, it being possible for the amine additionally to carry tertiary amino groups, the nitrogen content in the cationic modification product being between 0.02 and 6% by weight and the weight content of bridging bonds of epoxide compounds being between 1 and 70% by weight, in each case based on the cationically modified novolak. Process for the preparation of the cationically modified novolaks from the starting novolak, epoxide compound and amine, which are reacted with one another at temperatures between 60.degree. and 200.degree. C., if appropriate in the presence of solvents. Use of the cationic modification products of novolaks as an additional component in rubber-based moldings or adhesives, and furthermore the use in particular of those products which contain tertiary amino groups, together with crosslinking agents, for the production of shaped articles, flat coatings, putties, adhesive joints, curable molding or sinter compositions, friction linings and laminates and for the preparation of synthetic resin solutions which, after protonation, are water-dilutable and can be used for cataphoretic coatings.