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Aqueous dispersions of grafted functionalized polyorganosiloxanes, a process for their preparation and their use in curable silicone compositions
Aqueous dispersions of grafted functionalized polyorganosiloxanes, a process for their preparation and their use in curable silicone compositions
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机译:接枝官能化聚有机硅氧烷的水分散体,其制备方法及其在可固化有机硅组合物中的用途
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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.
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