Siloxane-based composition which is intended for tire molding/stripping

A lubricating composition in the form of an oil-in-water emulsion, based on a polyorganosiloxane that can be polymerized and/or crosslinked by dehydrogeno-condensation, comprising:

• (a) at least one reactive polyorganosiloxane (A) comprising at least two OH groups per molecule and having a dynamic viscosity of from 50 to 3×106 mPa·s, at 25° C.;
• (b) at least one crosslinking agent (B) having, per molecule, at least three reactive units ≡SiH;
• (c) at least one organic polymer latex (C), selected from the group consisting of styrene/butyl acrylate/acrylic acid copolymers with the following weight ratios relative to total weight of copolymer:
• styrene monomer:
• from 25 to 55% by weight;
• butyl acrylate monomer:
• from 74.5 to 40% by weight;
• and
• acrylic acid monomer:
• from 0.5 to 5% by weight;
• (d) mica (D),wherein said mica has a particle size of less than 500 μm;
• (e) at least one surfactant (E);
• (f) optionally, at least one unreactive linear polyorganosiloxane oil (F) having a dynamic viscosity of around 50 to 100000 mPa·s at 25° C. and comprising a linear homopolymer or copolymer in which, per molecule, the monovalent organic substituents, whether identical or different from one another, linked to the silicon atoms, are selected from the group consisting of alkyl, cycloalkyl, alkenyl, aryl and alkylaryl radicals;
• (g) optionally, at least one additive (G) selected from the group consisting of a film-forming polymer thickening agent, a complementary lubricant, an antifriction agent, a coalescence agent, a wetting or dispersing agent, a mineral filler, an antifoam agent, a thickener, a stabilizer, an acidifying agent, a biocide and an antifungal agent;
• (h) at least one dehydrogeno-condensation catalyst;
• and
• (i) water,
• the amounts of surfactant and water being sufficient to obtain an oil-in-water emulsion and wherein the constituents (a) to (i), if present in the composition, are found in amounts comprising
• 1 to 30 parts by weight of constituent (a);
• 1 to 30 parts by weight of constituent (b);
• 0.1 to 10 parts by weight of constituent (c);
• 3 to 25 parts by weight of constituent (d);
• 0.5 to 10 parts by weight of constituent (e);
• 0 to 30 parts by weight of constituent (f);
• 0 to 30 parts by weight of constituent (g);
• and
• 20 to 60 parts by weight of constituent (i),
• per 100 parts by weight of a sum of constituents (a) to (i).