摘要:
The invention concerns a silicone/adhesive complex including at least one silicone coating applied on a first support and an adhesive coating applied on a second support, wherein the release force of a silicone/adhesive interface is capable of being modulated. The invention is characterized in that its silicone coating results from polymerization and/or curing by cationic process of polyorganosiloxane monomers, oligomers and/or polymers bearing as reactive groups at least epoxy, oxetane, dioxolane and/or alkenylether functions and the silicone coating further includes at least an additive regulating the release force of a silicone/adhesive interface and whereof the activity is photochemically initiated and adjustable.
摘要:
The invention concerns a novel release regulating silicone composition, and its use for preparing curable release compositions (Si-II/Si-Vi), adapted to be applied on substrates so as to facilitate removal of adhesive materials reversibly glued on said substrates. The invention aims at providing adhesion modifiers highly efficient in terms of regulating power and without negative effect on the instantaneous tackiness of adhesive materials laminated on the release silicone coating. Therefor the invention provides a release regulating system based on: 96 to 85 parts by weight of at least a reactive polyorganosiloxane resin (A) of the type: MDViQ, MDViT, MMHexenylQ, or MMAllyloxypropylQ: 4 to 15 parts by weight of at least a non-reactive resin (B) of the type: MD′Q, MDD′Q, MDT′, MQ or MDQ. The invention also concerns the use of a regulating system for preparing release compositions containing a linear polyorganosiloxane, said regulating system, a hydrosilylation inhibitor, a linear crosslinking polyorganohalogenosiloxane and a hydrosilylation catalyst.
摘要:
The invention relates to crosslinkable or crosslinked silicone compositions capable of being used to form a water-repellent and release coating for a flexible support made of paper or of polymer, in particular a heat-sensitive flexible support. These compositions are of the type of those comprising crosslinking polyorganosiloxanes carrying SiH units and unsaturated, preferably vinylated, polyorganosiloxanes capable of reacting with the crosslinking agent by polyaddition in the presence of platinum to form the release crosslinked coating on the flexible support.The targeted aim is to make possible the instantaneous crosslinking at low temperature (85-90° C.) of such silicone compositions coated on flexible supports at a very high speed.To achieve this aim, the invention provides for the use of specific crosslinking agents composed of POSs hydrogenated at the chain end and in the chain.The invention also relates to the silicone compositions of solvent-free type or of emulsion type comprising the Si-Vi POS, the SiH POS crosslinking agent α,ω-bis(hydrodimethylsiloxyl)poly(hydromethyl)-(dimethyl)siloxane, and the platinum catalyst, inter alia.Applications: release silicone coatings obtained by crosslinking/polyaddition for heat-sensitive flexible supports, for example polymeric films made of polyethylene.
摘要:
The invention relates to crosslinkable or crosslinked silicone compositions capable of being used to form a water-repellent and release coating for a flexible support made of paper or of polymer, in particular a heat-sensitive flexible support. These compositions are of the type of those comprising crosslinking polyorganosiloxanes carrying SiH units and unsaturated, preferably vinylated, polyorganosiloxanes capable of reacting with the crosslinking agent by polyaddition in the presence of platinum to form the release crosslinked coating on the flexible support. The targeted aim is to make possible the instantaneous crosslinking at low temperature (85-90° C.) of such silicone compositions coated on flexible supports at a very high speed. To achieve this aim, the invention provides for the use of specific crosslinking agents composed of POSs hydrogenated at the chain end and in the chain. The invention also relates to the silicone compositions of solvent-free type or of emulsion type comprising the Si-Vi POS, the SiH POS crosslinking agent α,ω-bis(hydrodimethylsiloxyl)poly(hydromethyl)-(dimethyl)siloxane, and the platinum catalyst, inter alia. Applications: release silicone coatings obtained by crosslinking/polyaddition for heat-sensitive flexible supports, for example polymeric films made of polyethylene.
摘要:
The invention relates to crosslinkable or crosslinked silicone compositions capable of being used to form a water-repellent and release coating for a flexible support made of paper or of polymer, in particular a heat-sensitive flexible support. These compositions are of the type of those comprising crosslinking polyorganosiloxanes carrying SiH units and unsaturated, preferably vinylated, polyorganosiloxanes capable of reacting with the crosslinking agent by polyaddition in the presence of platinum to form the release crosslinked coating on the flexible support.The targeted aim is to make possible the instantaneous crosslinking at low temperature (85-90° C.) of such silicone compositions coated on flexible supports at a very high speed.To achieve this aim, the invention provides for the use of specific crosslinking agents composed of POSs hydrogenated at the chain end and in the chain.The invention also relates to the silicone compositions of solvent-free type or of emulsion type comprising the Si-Vi POS, the SiH POS crosslinking agent α,ω-bis(hydrodimethylsiloxyl)poly(hydromethyl)-(dimethyl)siloxane, and the platinum catalyst, inter alia.Applications: release silicone coatings obtained by crosslinking/polyaddition for heat-sensitive flexible supports, for example polymeric films made of polyethylene.
摘要:
The invention concerns crosslinkable silicone compositions, useful for forming water-repellent and release coating for flexible heat-sensitive support. Said compositions comprise crosslinking polyorganosiloxanes (POS) bearing ≡Si—H units and unsaturated POS, for example ≡Si-Vi vinyl-containing POS, capable of reacting with the crosslinking agent by polyaddition, in the presence of platinum to form a release crosslinked coat on the flexible support. The invention aims at instantaneously enabling low platinum content crosslinking of such silicone compositions, coated at high speed. Therefor, the invention provides for the use of particular crosslinking agents consisting of hydrogenated POS comprising at least three hydrogen atoms bound to the silicon located at chain end and in the chain. The invention also concerns solvent-free or emulsion-type silicone compositions comprising the ≡Si-Vi POS (I.1), the crosslinking agent ≡Sl-H POS (l.2) and the platinum catalyst among others. The invention is useful for coating flexible supports, for example made of Lissé BEKK>1000 paper.
摘要:
The invention relates to a liquid silicone formulation for the preparation of water-repellent and release crosslinked elastomer coatings on a solid support, for example made of paper. The targeted aim is to overcome the problem of the lack of adhesion of silicone elastomer films with a release outer face intended to be adhesively bonded to flexible supports of the following types: dense paper of glassine type or polypropylene polymer film. To achieve this aim, the liquid silicone formulation according to the invention which can be used as coating base for the preparation at very high speed of a water-repellent and release crosslinked elastomer coating on a solid support comprises: at least one crosslinkable polyorganosiloxane POS (I) (POS of SiVi type and POS of SiH type); at least one catalyst (II) (platinum-based); optionally an adhesion-adjusting system (III); an adhesion promoter (IV) comprising an epoxidized alkoxysilane and/or an alkenylated alkoxysilane, and a metal chelate and/or a metal alkoxide (GLYMO/MEMO/TiOBu4). The most viscous POS (I) has a viscosity of less than or equal to 1500 mPa·s.
摘要:
Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.
摘要:
The invention relates to a filter element comprising a support with an outside surface and at least three channels in the support. The channels comprise a peripheral wall directed towards the outside surface, the distance between the peripheral wall and the outside surface reducing on each side of the middle of the peripheral wall. The element has the advantage of improved strength when subject to severe conditions of use.
摘要:
The invention concerns crosslinkable silicone compositions, useful for forming water-repellent and release coating for flexible heat-sensitive support. Said compositions comprise crosslinking polyorganosiloxanes (POS) bearing ≡Si—H units and unsaturated POS, for example ≡Si-Vi vinyl-containing POS, capable of reacting with the crosslinking agent by polyaddition, in the presence of platinum to form a release crosslinked coat on the flexible support. The invention aims at instantaneously enabling low platinum content crosslinking of such silicone compositions, coated at high speed. Therefor, the invention provides for the use of particular crosslinking agents consisting of hydrogenated POS comprising at least three hydrogen atoms bound to the silicon located at chain end and in the chain. The invention also concerns solvent-free or emulsion-type silicone compositions comprising the ≡Si-Vi POS (I.1), the crosslinking agent ≡Sl-H POS (l.2) and the platinum catalyst among others. The invention is useful for coating flexible supports, for example made of Lissé BEKK>1000 paper.