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:
Sep. 21, 1999
Filed:
Nov. 12, 1997
Douglas C Neckers, Perrysburg, OH (US);
Kathleen G Specht, Bowling Green, OH (US);
Kesheng Feng, Bowling Green, OH (US);
Roman Popielarz, Bowling Green, OH (US);
Spectra Group Limited, Inc., Maumee, OH (US);
Abstract
A method for monitoring a property of a cationically curable composition comprising the steps of: adding a fluorescence probe to a cationically curable composition; measuring the intensity of the fluorescence emission of the probe at a wavelength at which intensity changes in response to changes occurring in the composition, wherein the fluorescence probe is a compound of the formula (I): ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are the same or different and represent hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 alkoxyl, C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkenoxyl, C.sub.3 -C.sub.27 cycloaliphatic, C.sub.7 -C.sub.27 aralkyl, C.sub.7 -C.sub.27 aralkoxyl, C.sub.7 -C.sub.27 alkaryl, or a substituted or unsubstituted diphenyl ether having the structure R.sup.9 --C.sub.6 H.sub.4 --O--C.sub.6 H.sub.4 R.sup.10 where R.sup.9 and R.sup.10 may be hydrogen, alkyl, aryl or aralkyl; and R.sup.1,R.sup.2 and R.sup.3 may be unsubstituted or may be substituted with or contain therein one or more atoms selected from the group consisting of O, S, N, OH, SH, NH.sub.2, P, Cl, Br and I; and R.sup.4 may be the same as R.sup.1, R.sup.2 and R.sup.3 ; or R.sup.4 may represent COOR.sup.5, CONR.sup.5 R.sup.6, SO.sub.2 OR.sup.5, SOOR.sup.5, SONR.sup.5 R.sup.6, SO.sub.2 NR.sup.5 R.sup.6 or NR.sup.5 R.sup.6, where R.sup.5 and R.sup.6 may be hydrogen, alkyl, aryl or aralkyl; curing the composition; causing the probe to fluoresce; measuring the fluorescence of the probe; relating the change in intensity to a monitored property of the composition; and determining the monitored property of the composition, based upon the change in intensity.