摘要:
The invention relates to an aqueous silicone dispersion, containing one or more polyorganosiloxanes (POSs) intended to be crosslinked or having been crosslinked by elimination of water or alcohol, according to a polycondensation mechanism. The present invention also relates to methods for preparing aqueous silicone emulsions and dispersions.
摘要:
The invention relates to an aqueous silicone dispersion, containing one or more polyorganosiloxanes (POSs) intended to be crosslinked or having been crosslinked by elimination of water or alcohol, according to a polycondensation mechanism. The present invention also relates to methods for preparing aqueous silicone emulsions and dispersions.
摘要:
The invention relates to the general field of silicone coating on various pliable supports, for example textiles, made of synthetic polymers (polyamide, polyester, etc.). An aim of the invention is to propose an effective process for producing coatings that are waterproof and permeable to moisture vapour, on pliable supports, this process allowing an improvement in the moisture vapour-permeability of the silicones while at the same time conserving the waterproofness. The process according to the invention which achieves this aim consists essentially in coating one of the faces of the support with a film formed by a water-in-oil inverse silicone emulsion comprising a continuous oily silicone phase φs, which can be crosslinked into an elastomer and which comprises a polyorganosiloxane (POS) A that is crosslinkable by polyaddition, by polycondensation, by cationic means or by free-radical means; optionally a crosslinking organosilicic compound B; optionally at least one catalyst C, an aqueous phase φa, a stabilizer, and in seeing to it that the silicone phase φs crosslinks and that removal of water occurs. The invention also relates to pliable supports made of polyamide or polyester, that are waterproof and permeable to moisture vapour, obtained by using a water-in-oil inverse silicone emulsion.
摘要:
Coating of flexible materials with liquid compositions is disclosed. The compositions advantageously comprise one or more polyorganosiloxanes crosslinkable by polyaddition, by dehydrocondensation, by polycondensation, cationically or free-radically to form a protective coating or film having, in particular, release and/or water-repellency properties.
摘要:
Coating of flexible materials with liquid compositions is disclosed. The compositions advantageously comprise one or more polyorganosiloxanes crosslinkable by polyaddition, by dehydrocondensation, by polycondensation, cationically or free-radically to form a protective coating or film having, in particular, release and/or water-repellency properties.
摘要:
Silicone coating on various soft supports, for instance textiles, made of synthetic polymers (polyamide, polyester) provides an efficient method for producing water impermeable and water permeable coatings, on soft supports, said method enabling to improve permeability to water vapor of the silicones while preserving impermeability to water. The inventive method enabling this consists mainly in: coating one of the surfaces of the support with a film formed by an invert water-in-oil silicone emulsion comprising a continuous oily silicone phase phi s, crosslinkable into elastomer and including a polyorganosiloxane (POS) A crosslinkable by addition polymerization, by cationic process or free-radical process; optionally a crosslinking organosilicon compound B; and optionally at least a catalyst C; an aqueous phase phi a; a stabilizing agent; and in ensuring crosslinking of the silicone phase phi s and elimination of water. The invention also concerns water impermeable and water vapor permeable soft polyamide or polyester substrates obtained by using an invert water-in-oil silicone emulsion.
摘要:
Silicone coating on various soft supports, for instance textiles, made of synthetic polymers (polyamide, polyester) provides an efficient method for producing water impermeable and water permeable coatings, on soft supports, said method enabling to improve permeability to water vapor of the silicones while preserving impermeability to water. The inventive method enabling this consists mainly in: coating one of the surfaces of the support with a film formed by an invert water-in-oil silicone emulsion comprising a continuous oily silicone phase phi s, crosslinkable into elastomer and including a polyorganosiloxane (POS) A crosslinkable by addition polymerization, by cationic process or free-radical process; optionally a crosslinking organosilicon compound B; and optionally at least a catalyst C; an aqueous phase phi a; a stabilizing agent; and in ensuring crosslinking of the silicone phase phi s and elimination of water. The invention also concerns water impermeable and water vapor permeable soft polyamide or polyester substrates obtained by using an invert water-in-oil silicone emulsion.
摘要:
The present invention relates to a composition I, in the form of an oil-in-water emulsion, based on siloxane and which does not emit hydrogen, comprising: (a) optionally a nonreactive linear polyorganosiloxane oil with lubricating properties, (a′) a reactive linear polyorganosiloxane oil containing at least two OH groups per molecule, (b) a polyorganosiloxane resin, (c) a crosslinking agent which is soluble in the silicone phase comprising at least two functional groups capable of reacting with the polyorganosiloxane resin (b); (d) a condensation catalyst capable of catalyzing the reaction of the constituent (b) with the constituent (c); (e) a surfactant; and (f) water, (a) and (a′) being mixed together before emulsification, in an (a)/(a′) ratio of between 0 and 10.
摘要:
The invention relates to a dried emulsion. In particular, the invention relates to a dried emulsion containing a liquid hydrophobic phase and a water-soluble or water-dispersible polymeric matrix whose hydrophobic phase content is high. The invention also relates to a method for producing the dried emulsion and to uses of this emulsion. The utilized water-soluble matrix contains block copolymers.
摘要:
Lubricating compositions, in the form of oil-in-water emulsions, are based on a siloxane and do not release hydrogen and are particularly suited for the lubrication of internal surfaces of uncured or unvulcanized envelopes useful for the manufacture of rubber pneumatic or semi-pneumatic tires for vehicles, as well as for vulcanization bladders useful for the shaping and vulcanizing of pneumatic or semi-pneumatic tires.