Patent ID: 9732261
Date: 2017-08-15
CPC Classifications: C08K,C08L,C09J

Claim:
1. A polyorganosiloxane composition X which can be crosslinked to give an elastomer in the presence of water via a polycondensation reaction, comprising: A) at least one polyorganosiloxane A comprising at least one alkoxylated group and composed of identical or different siloxyl units, of formula: B) an amount strictly greater than 35% by weight, relative to the total amount of the composition, of at least one ground natural calcium carbonate B which has a specific surface area strictly less than 3 m C) a catalytically effective amount of at least one condensation catalyst C which is a guanidine that has an imine function substituted with an atom other than a hydrogen atom corresponding to formula (I) or (II): in which: in which: D) at least one polyalkoxysilane D that has at least one group comprising at least one nitrogen atom, E) optionally at least one filler E other than said ground natural calcium carbonate B, F) optionally at least one additive F, such as a coloring base, a pigment or a thixotropic agent, and with the additional condition that said polyorganosiloxane composition X does not contain acetylene black.