Patent ID: 6998427

Claim:
Silicone material which comprises the following constituents: I. a POS composition crosslinkable by polyaddition reactions comprising: (1) at least one POS composition carrying Si-alkenyl functional groups which are capable of reacting by addition reactions with the Si—H crosslinking functional groups of a POS(2) composition, (2) at least one POS composition carrying Si—H functional groups which are capable of reacting with the Si-alkenyl functional groups of the POS(I) composition, (3) optionally, at least one unreactive POS composition, differing from the POS(1) and POS(2) compositions, which can be used as a diluent, (4) a catalyst for catalysing the polyaddition reactions, (5) a particulate reinforcing mineral filler; II. a wetting agent comprising one or a mixture of more surfactants allowing the surface of the silicone material to be given a pronounced hydrophilic character, both before and after crosslinking; wherein the wetting agent II is selected from the group consisting of: (a) at least one nonionic surfactant consisting of an ester obtained by esterification of a saturated monocarboxylic acid having a C 10 –C 14 linear or branched chain by a poly(oxyalkylene)glycol containing a number of alkoxylated units such that the molar mass M w of the ester lies within the 400 to 800 g/mol range, the HLB of the said surfactant or of the mixture of surfactants ranging from 6 to 14; a synergistic combination (a)+(b), where (b) denotes at least one nonionic surfactant consisting of a polyalkoxylated saturated aliphatic alcohol having a C 5 –C 16 linear or branched chain, containing a number of alkoxylated units such that the molar mass M w of the polyalkoxylated alcohol lies within the 200 to 1400 g/mol range, the HLB of the said surfactant (b) or of the mixture of surfactants (b) ranging from 6 to 16; and a synergistic combination (b1)+(b2), where (b1) denotes at least one nonionic surfactant consisting of a polyethoxylated saturated aliphatic alcohol having a C 10 –C 16 linear or branched chain, containing from 6 to 10 ethylene oxide (EO) units, the HLB of the said surfactant (b1) or of the mixture of surfactants (b1) ranging from 12 to 16, and (b2) denotes at least one nonionic surfactant consisting of a polyalkoxylated saturated aliphatic alcohol having a C 6 –C 13 linear or branched chain, containing a number of ethylene oxide (EO) and propylene oxide (PO) units such that the molar mass M w of the polyalkoxylated alcohol lies within the 500 to 1200 g/mol range, the HLB of the said surfactant (b2) or of the mixture of surfactants (b2) ranging from 6 to 16.