Aqueous dispersions based silicone oils may be crosslinked by water removal and use in manufacture gaskets silicone elastomer.

摘要

Aqueous dispersions comprising: a silicone oil (A) capable of crosslinking by condensation, IF NECESSARY IN PRESENCE OF A crosslinker (B), an elastomer, optionally a crosslinker (B), a silane (C) , an inorganic filler (D); CATALYTIC AMOUNTS OF COMPOUND HARDENING (E); And characterized they are obtained by stirring a MIX CREATED: 1) A silicone phase (F) with a viscosity of at least 3 Pa.s, comprising oil (A) and optionally at least one constituent (B) , (C), (D) or (E) and 2) A AQUEOUS PHASE comprising water and at least one surfactant (G), the ratio PONDERAL / water + AGENT (S) sURFACTANT (S) such that viscosity Aqueous Phase SEA preferably at least equal to the PHASE SILICON (F); DURING A LONG AND CUT ENOUGH FOR A EMULSION "oil in water" particle size from 0.1 to 5 (MU) M; And then diluted with water to a EVENTUALLY SOLIDS 25 TO 97%; AND THEN ADD OR CONSTITUENTS not present in PHASE SILICON (F).