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. 16, 2002
Filed:
Apr. 19, 2000
Pierre Barruel, Tassin la Demi-Lune, FR;
Yves Bomal, Paris, FR;
Nathalie Guennouni, Irigny, FR;
Gerard Mignani, Lyons, FR;
Christian Priou, Villeurbanne, FR;
Rhodia Chimie, Courbevoie Cedex, FR;
Abstract
The present invention relates to a process for preparing multifunctionalized polyorganosiloxanes (POSs) comprising alkoxyl functional siloxyl units and siloxyl units each having an SH functional group, which consists in introducing the SH functional group by the reaction of H S on a precursor POS of formula: A—(RXSiO) —(RYSiO) —B where R is especially a C -C alkyl radical, X is a C -C alkoxyl radical, Y is a C -C hydrocarbon group which includes an ethylenically unsaturated group from which the SH functionality derives, a is a number ranging from 1 to 150, b is a number ranging from 1 to 150, the number a+b ranging from 2 to 300 and A and B are terminal groups which are selected respectively, from, in particular, on the one hand (R) SiO— radicals taken alone or as mixtures with (R) XSiO— and/or R(X) SiO— and/or (X) SiO— radicals and on the other hand —Si(R) radicals taken alone or as mixtures with —SiX(R) and/or —Si(X) R and/or —Si(X) radicals.