Hydrophobic Dynasylan® diaminofunctional silane is used in adhesives and sealants, and in coatings, to improve the adhesion of amino-reactive resins. Dynasylan® diaminofunctional silane used in coatings, adhesives, & sealants to improve the adhesion of amino-reactive resins. – The Cary Company!. Hydrophobic Dynasylan® diaminofunctional silane is used in adhesives and sealants, and in coatings, to improve the adhesion of amino-reactive resin.
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Silicones are compositions which have been dynasylab as adhesives or sealants. Curable polymer composition and method for preparing curable polymer composition. Such oligomeric siloxanes are commercially available, e.
Monomeric silane cross-linkers can have, e. Phase separations in the examples were visually observed. This is accompanied by changed qualities of the formulated RTV silicones such as reduced reactivity and reduced adhesion.
Exemplary dynasylsn residues are residues with the formula 1 R F -alkyl- the formula 2 R F -alkyl-Si R S 2 —O—, the formula 3 aminoalkylaminoalkyl and the formula 4 aminoalkylaminoalkylaminoalkyl, wherein in the formulas 1 to 4 R F is selected from mercapto, glycidoxy, amino e.
Monomeric silane cross-linkers and also oligomeric condensation products of them are cross-linkers for silicone formulations. The mixture was applied with a layer thickness of ca. This results in problems of the storage stability of formulated silicone products.
In an exemplary embodiment, the functionalized oligodimethylsiloxane has an HLB value less than or equal to 15, for example, less than or equal to 12, for example, less than or equal to 9. Dynwsylan filler, thermocoductive silicone elastomer composition, and dynasylsn devices.
R 2 is independently of each other alkyl, for example, methyl, hydroxy, alkoxy, such as methoxy or ethoxy, alkyldimethylsilyloxy, alkylmethylalkoxysilyloxy or alkyldialkoxysilyloxy. Exemplary ketoxime residues and alkoxy residues have already been previously described. For example, the functionalized oligodimethylsiloxane does not have more than 20, for example, not more than 10 terminal or side functionalizing residues.
A method of using the one- or two-component silicone formulation according to claim 6comprising mixing the polymer component A with the hardener component B. This can be, for example, a linear functionalized oligodimethylsiloxane.
Dynasylan® – the brand for Functional Silanes
The one- or two-component silicone formulation according to claim 1wherein the polydiorganosiloxane is a hydroxy-terminated polydimethylsiloxane. The addition of functionalized oligodimethylsiloxanes in accordance with the disclosure delays or prevents the phase separation and the properties of a corresponding silicone formulation remain unchanged.
Concrete examples from monomeric silane cross-linkers are methyltrimethoxysilane, vinyltrimethoxysilane, phenyltrimethoxysilane, propyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2-aminoethylaminopropyltrimethoxysilane, 1,2-bis- trimethoxysilyl ethane, bis- trimethoxysilylpropyl amine, N- n-butyl aminopropyltrimethoxysilane, N-cyclohexylaminomethyltrimethoxysilane, methacryloxymethyltrimethoxysilane, O-methylcarbamatomethyltrimethoxysilane or the corresponding compounds in which the methoxy residue is replaced by ethoxy, propoxy, oxime or ketoxime.
In the two-component silicone formulation, the cross-linking of the polyorganosiloxane is started by the mixing of the polymer component A containing the polyorganosiloxane with the hardener component 146 containing the cross-linker. The bridge residue can be, e. Suitable catalysts are commercially obtainable. The one- or two-component silicone formulation according to claim 1wherein the degree of condensation of the functionalized oligodimethylsiloxane is in the range of 5 to The storage was halted after 6 months when no phase separation was able to be observed up to then.
Dnyasylan service provided by the Evonik Resource Efficiency GmbH, BL Silanes business is unique in the world, since scientists and engineers at Evonik are mastering the technology — their own and that of the customers. The one- or two-component silicone formulation according to claim 1wherein the oligomeric siloxane is a condensation product of one or more monomeric silane cross-linkers and the monomeric silane cross-linker is a silane compound with two or more functional residues selected from at least one of alkoxy residues, acetoxy residues, oxime residues, amino residues, or N-methylamido residues.
The indicated viscosity values refer to a shear rate of 0. The index m can be selected in such a manner that the polydiorganosiloxane has the viscosity indicated in the following.
The silicone formulation can optionally comprise one or more fillers with which, e.
The amount of the oligomeric siloxane as cross-linker can vary within wide ranges. Examples of functionalized oligodimethylsiloxanes can comprise one of the two following general formulas, wherein the substituent Me represents methyl residues.
For example, a first condensation of two tetramethoxysilane molecules results in a dimer that contains six functional residues; the linking is formed from a functional residue of each molecule by condensation.
R 2 is independently of each other alkyl, hydroxy, alkoxy, alkyldimethylsilyloxy, alkylmethylalkoxysilyloxy or alkyldialkoxysilyloxy. As was previously explained, such polydimethylsiloxanes can be modified by the partial inclusion of other residues such as phenyl instead of methyl.
The one- or two-component silicone formulation therefore furthermore comprises a functionalized oligodimethylsiloxane. This website provides links to other websites owned by third parties. However, silicone polymers, for example OH-terminated polydimethylsiloxanes with viscosities between andmPas are frequently not readily miscible with the functional oligosiloxanes in contrast to the monomers.
The one-component silicone formulations are, for example, moisture-curing systems in which the cross-linking of the polydiorganosiloxane takes place by the contact with moisture.
The formulation of moisture-hardening RTV silicones that contain functional silanes, for example, tri- and tetra-functional silanes as cross-linkers is used. Company The service provided by the Evonik Resource Efficiency GmbH, BL Silanes business is unique in the world, since scientists and engineers at Evonik are mastering the technology — their own and that of the customers.
The one- or two-component silicone formulation according to claim 1wherein the functionalized oligodimethylsiloxane is an oligodimethylsiloxane that comprises terminally or laterally at least one functionalizing residue bound to an Si atom, which residue comprises at least one functionalizing residue selected from mercapto, glycidoxy, amino, amido, methacrylato, carbamato, isocyanato, or polyalkylene glycol.
It was surprisingly found that the addition of certain functionalized oligodimethylsiloxanes improves the miscibility of functional oligosiloxanes with silicone oils.
The problem is therefore addressed, for example, by a one- or two-component silicone formulation that comprises a at least one cross-linkable polydiorganosiloxane, b at least one oligomeric siloxane as cross-linker for the polydiorganosiloxane, wherein the oligomeric siloxane is a condensation product of monomeric silane cross-linkers, and c at least one functionalized oligodimethylsiloxane.
The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The one- or two-component silicone formulation according to claim 1wherein the oligomeric siloxane is a condensation product of one or more monomeric silane cross-linkers and the monomeric silane cross-linker is a silane compound with three or more functional residues selected from at least one of alkoxy residues, acetoxy residues, oxime residues, amino residues, or N-methylamido residues.
For example, the oligomeric siloxane can be present in a 1-component silicone formulation in an amount of 0. Oligomers of functional silanes are complicatedly constructed 3-dimensional compounds. The one- or two-component silicone formulation according to claim 1wherein the functionalized oligodimethylsiloxane is a linear functionalized oligodimethylsiloxane. You may choose a language below to continue to this industry or close this dialog above.
The oligomeric siloxane as cross-linker is a condensation product of one or more such monomeric silane cross-linkers.
The viscosity of the polydiorganosiloxanes used can vary within wide ranges according to the intended use. According to another aspect, a silicone component is provided, comprising:. Concrete exemplary embodiments of the disclosure are explained in the following but rynasylan not intended to limit the scope of the dynasyaln. The use of oligomeric silane cross-linkers is not described.
Two component fast-curing-RTV adhesive sealant suitable for low-ratio packaging. According to one aspect, a one- or two-component silicone formulation is provided, comprising:.