Patent ID: 6902816
Filing Date: 2005-06-07
Classification: C08J,C08K,C09D,Y10S,Y10T

Abstract:
1. A silicone composition useful for the production of varnish having anti-friction properties, this composition comprising at least one polyorganosiloxane (POS) which can be crosslinked by means of crosslinking functional groups (CFG) by the cationic and/or free-radical route and an effective quantity of a cationic initiator system comprising, as thermal initiator and/or photoinitiator, a product chosen from the onium salts of an element of groups 15 to 17 of the Periodic Table or the salts of an organometallic complex of an element of groups 4 to 10 of the Periodic Table, whose cationic entity is selected from: with the additional conditions according to which: a) when t=0, the symbol Y is then a monovalent radical Y  where the symbols Ar b) when t=1: b1) on the one hand, the symbol Y is then a divalent radical having the following meanings Y b2) on the other hand, only in the case where the symbol Y represents Y in which formula: a phenyl radical substituted with at least one electron attracting atom or one electron-attracting group, and this being when the cationic entity is an organo-metallic complex of an element of groups 4 to 10 of the Periodic Table, an aryl radical containing at least two aromatic nuclei optionally substituted with at least one electron attracting atom or one electron-attracting group, regardless of the cationic entity; said composition comprising, in addition, molecules substituted with hydrolyzable secondary functional groups (SFG) carried by at least one silicon atom per molecule; with the proviso that either said CFGs and said SFGs are carried by different molecules based on silicon, or said composition comprises POS molecules that are substituted both with CFGs and with SFGs and POS molecules substituted only with CFGs.