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:
Apr. 18, 2006
Filed:
Feb. 05, 2002
Martin Gmur, Unterageri, CH;
Ulrich Daum, Hofstetten, CH;
Brigitta Heyl-frank, Visp, CH;
Paul Hanselmann, Glis, CH;
Alessandro Falchetto, Domodossola, IT;
Martin Gmur, Unterageri, CH;
Ulrich Daum, Hofstetten, CH;
Brigitta Heyl-Frank, Visp, CH;
Paul Hanselmann, Glis, CH;
Alessandro Falchetto, Domodossola, IT;
Lonza AG, Basel, CH;
Abstract
Described are prepolymer compositions on the basis of novolak cyanates of the general formulawherein n is a number from 0 to 20 and the radicals R are identical or different and represent hydrogen or methyl. The compositions contain: 30 to 90 parts by weight of a prepolymer from novolak cyanates (I) wherein R=hydrogen (Ia) and 10 to 70 parts by weight of novolak cyanates (I) wherein R=methyl (Ib), and optionally highly disperse silicon dioxides and/or particulate or fibrous fillers. The inventive compositions are solid at normal temperature and can be ground to flowable powders. They have excellent stability when stored and are easy to process and especially suitable for use as the resin component in base materials for printed circuits on resin-bound abrasive products.