Patent ID: 8329307
Filing Date: 2012-12-11
Classification: C08L,C09D,D06M,D06N,Y10T

Abstract:
1. Cross-linkable silicone composition useful in particular as a varnish having in particular anti-fouling properties, this composition being cross-linkable by polyaddition and comprising: at least two inter-reactive polyorganosiloxane (POS) species (A) and (B) in the presence of a metal catalyst (C) in order to allow cross-linking by polyaddition; optionally at least one particulate component (D); at least one cross-linking inhibitor (E); optionally at least one solvent (F), optionally at least one adhesion promoter (G); optionally at least one functional additive (H) for imparting specific properties; wherein species (A) comprises at least two different siloxy units chosen from those of formula: in which: W represents an alkenyl group; Z represents a non-hydrolyzable monovalent hydrocarbon group, without any adverse effect on the activity of the catalyst, optionally halogenated, a is 0, 1, or 2, b is 0, 1, or 2 and a+b is between 0 and 3, optionally at least some of the other units are units of average formula: in which c has a value between 0 and 3; at least one of these two different siloxy units being a T or Q unit; species (B) comprises at least one crosslinking agent POS, having, per molecule, at least two hydrogen atoms bound to the silicon; a molar ratio R═SiH/SiVi of the hydrogen species (B) to the alkenyl species (A) is greater than or equal to 2; a concentration C a dynamic viscosity η (mPa·s at 25° C.) of the composition before application is such that 2≦η≦500.