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:
May. 08, 1990
Filed:
Jul. 06, 1987
Hans-Joachim Kotzsch, Rheinfelden, DE;
Hans-Joachim Vahlensieck, Wehr, DE;
Huels Aktiengesellschaft, Cologne, DE;
Abstract
Disclosed are 2-silacoumaranes and their o-allylphenolsilane monoester precursors and methods for their preparation. The benzene ring of these new compounds may be substituted with halogen and/or alkyl or alkyl halogen moieties. The cyclization of monoester precursor to the desired end products is performed in the presence of catalysts. This cyclization can be performed without the isolation of the o-allyphenolsilane monoester by feeding by the cyclization reactor with the starting products for the preparation of this intermediate directly after they have reacted, or, if trichlorosilane is the starting product, directly after they have been mixed. Among other applications, the invention compounds are suitable for use as adhesion mediators and additives for coating compositions.