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:
Jun. 04, 1991
Filed:
Sep. 05, 1989
Jean-Marc Frances, Villeurbanne, FR;
Francois Metz, Lyon, FR;
Rhone-Poulenc Chimie, Courbevoie, FR;
Abstract
Novel linear or branched O.sub.2 -curable polyorganosiloxanes containing propanaldehyde functional groups and at least three recurring siloxyl units per molecule, at least one unit of which corresponds to the general formula: ##EQU1## in which X is the radical --CH.sub.2 --CH.sub.2 CHO or the radical ##STR1## and R is a monovalent hydrocarbon residue containing from 1 to 12 carbon atoms, are prepared by hydroformylation of the corresponding polyorganosiloxane in an organic phase by means of a catalyst system which is soluble in the organic phase but insoluble in aqueous phase, such catalyst system including a rhodium/sulfonated or carboxylated triarylphospine salt complex.