Aqueous dispersions of polyorganosiloxanes functionalized grafted, to a process for their preparation and their use for the production of silicone compositions curable.

摘要

Reactive stable aqueous dispersions of polyorganosiloxanes functionalized grafted composed of units, grafted copolymers derived from at least one ethylenically unsaturated monomer, which can polymerize by radical polymerization and of a functionalized polyorganosiloxanes containing units which are identical or different of formula (i) & br / (see appended drawing in bopi) & br / & & br / in which formula: & br / - the symbols r represents an alkyl, alkenyl, aryl or aralkyl; & br / - the symbols x represent a hydrogen atom or a reactive function which is connected to a silicon atom by a link if - c, or if - o - c; & br / - the symbols y represent an ethylenically unsaturated hydrocarbon residue bonded to a silicon atom of the pattern of formula (i) by a link if - c and capable of reacting with a radical route, with the said or the ethylenically unsaturated monomer (s) (s); & br / - a, b and c are equal to 0, 1, 2 or 3; & br / - a + b + c = 0, 1, 2 or 3; & br / & the content of units sio4 / 2 being less than 30% by mole; & br / the number of units of formula (i) in which the silicon atom carries a function of x and / or a rest is such that said polyorganosiloxane contains br / - at least 5 milliequivalents, preferably from 10 to 500 milliequivalents of functions x for 100 g of polyorganosiloxane of formula (i), & br / - at least 5 milliequivalents, preferably from 10 to 500 milliequivalents of residues y for 100 g of polyorganosiloxane of formula (i). br / use of said aqueous dispersions of polyorganosiloxanes functionalized grafted to the embodiment of the silicone compositions curable under the action of heat, radiation, of the electron beams.. and / or with the aid of a catalyst.