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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Oligomers of functional silanes are dynasjlan constructed 3-dimensional compounds. The residues R 4 can stand for phenyl- vinyl or for methyl residues.
It was surprisingly found that the addition of certain functionalized oligodimethylsiloxanes improves the miscibility of functional oligosiloxanes with silicone oils. Its low volatility and viscosity make compounding easy.
Vinylmethylmethoxysilyl- terminated Functionalized poly dimethylsiloxaneFunctional oligodimethyl- Ex. The present disclosure addresses, for example, the problem of this phase separation and provides means for increasing the miscibility of the oligomeric siloxane cross-linkers with silicone oils and therefore improving the stability in storage.
The addition of such additives is a familiar practice for such silicone formulations. In a two-component system, the additives can be added to one or to both components.
Dynasylan® – Hydrophobic Diaminofunctional Silane (55 lb. Pail)
The one- or two-component silicone formulation according to claim 1wherein the silicone formulation is a two-component silicone formulation, wherein the first component as polymer component A comprises the at least one polydiorganosiloxane and the second component as hardener component B comprises the at least one oligomeric siloxane and the at least one functionalized oligodimethylsiloxane.
The content of such third party sites is not within our control, and we cannot and will not take responsibility for the information or content. The oligomeric siloxane as cross-linker is a condensation product of one or more such monomeric silane cross-linkers.
The two alkyl residues of the dialkylketoxime residues can stand independently of one another for methyl- ethyl- n-propyl- iso-propyl- n-butyl- or iso-butyl residues.
Monomeric silane cross-linkers are in general silane compounds containing two or more, e. The indicated viscosity values refer to a shear rate of 0.
The one- or two-component silicone formulation can be a silicone formulation that cures at room temperature, that is, an RTV silicone, wherein a one-component RTV silicone is also designated as an RTV 1 silicone and a two-component RTV silicone is also designated as an RTV 2 silicone.
Self-adhering polyorganosiloxane elastomer compositions and method for preparing same. Such additional components are, e. Concrete exemplary embodiments of the disclosure are explained in the following but are not intended to limit the scope of the disclosure.
Regarding the dynassylan residue, in general, in contrast to the above-cited functional dynasylqn, no cross-linking with the functional residues of polydiorganosiloxane is possible, at least under the conditions under which the silicone formulation is cured.
The functional residues can be present at any position of the silane cross-linker and can be bound to an Si atom of the monomeric silane cross-linker. Customary catalysts are, e. Furthermore, silicone formulations with a higher flash point and therefore with improved work safety can be formulated.
The oligomeric siloxane can be formed, e. Oligomeric siloxanes are used in dhnasylan silicone formulations as cross-linkers usually substantially only in the hardener component and can be there in amounts of 0. The drawing-off speed is selected in such a manner that a cut is made about every 3 seconds.
The reaction between the functional residue of the polydiorganosiloxane and of the functional dynasylann of the cross-linker can take place by a condensation reaction. Suitable catalysts are commercially obtainable. The one-or two-component silicone formulation furthermore comprises one or more oligomeric siloxanes as cross-linkers for the polyorganosiloxane, wherein the oligomeric siloxane is a condensation product of monomeric silane cross-linkers.
The amount of the oligomeric siloxane as cross-linker can vary within wide ranges. We’re sorry, but the industry you have selected is not dynaslyan available in your chosen language. This is accompanied by changed qualities of the formulated RTV silicones such as reduced reactivity and reduced adhesion.
Reference is made to the previously described exemplary ketoxime residues as examples of oxime residues. The adhesion was determined by a subsequent peeling test. What is claimed is: The polymer component used for the test has the following composition:. Examples for R 6 are alkyl residues with 1416 to 5 C atoms, for example, methyl, ethyl or propyl, vinyl, aryl residues, such as phenyl, cycloalkyl residues, such as cyclohexyl, as well as substituted alkyl residues, with 1 to 8 C atoms, for example, methyl, ethyl or propyl, that are functionalized with one or more substituents such as optionally substituted amino NH 2NHR, NR 2wherein R is independently of one another alkyl, aryl or cycloalkylmercapto, glycidoxy, methacrylate, acrylate or carbamato.
The one- or two-component silicone formulation can also contain, in addition to the oligomeric siloxanes, monomeric silane cross-linkers such as described above.
EP A2 describes a silicone formulation containing a cross-linkable polydiorganosiloxane with OH terminal residues, a monomeric silane cross-linker or a condensate of it and an oligodiorganosiloxane containing alkoxy residues. A one-component or two-component silicone formulation including: 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 dnasylan of monomeric silane cross-linkers, and c at least one functionalized oligodimethylsiloxane.
The one- or two-component silicone formulation according to claim 1wherein the functionalized oligodimethylsiloxane is contained in an amount of 0. The functionalizing residue can be, e.
R 1 is independently of each other a functionalizing residue selected from a residue with the formula 1 R F -alkyl- the formula 2 R F -alkyl-Si R S 2 —O—, the formula 3 aminoalkylaminoalkyl, or the formula 4 aminoalkylaminoalkylaminoalkyl, wherein in the formulas 1 to 4R F is selected from mercapto, glycidoxy, amino, amido, methacrylato, carbamato, isocyanato or polyalkylene glycol; and R S is independently of each other C 1 -C 4 -alkyl or C 1 -C 4 -alkoxy.
Unless otherwise indicated, data refers to the weight. Trimethylsilyl-terminated polydimethylsiloxanes can also be used in which a few of the dynasyylan residues are replaced by other organic residues such as, for example, phenyl- vinyl- or trifluoropropyl residues. The functionalized oligodimethylsiloxane can be present in an amount of 0.
Dynasylan® 1146 – Hydrophobic Diaminofunctional Silane (55 lb. Pail)
The entire contents of these applications are hereby incorporated by reference in dyhasylan entireties. R 8 is a bivalent alkylene residue, e. The subscript n stands for 0, 1 or 2, for example, 1.