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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Trimethylsilyl-terminated polydimethylsiloxanes can also be used in which a few of the methyl residues are replaced by other organic residues such as, for example, phenyl- vinyl- or trifluoropropyl residues.
Formulations containing functional oligosiloxanes, that is, oligomers of functional silanes are also used. This is surprisingly the case with functionalized oligodimethylsiloxanes, whose structure is substantially chain-shaped or star-shaped, that is, rather 2-dimensional.
The oligomeric siloxane contains functional residues stemming from the monomeric silane cross-linker.
The presently disclosed ddynasylan are therefore considered in all respects to be illustrative and not restricted. In the above two general formulas R 1 is independently of each other a functionalizing fynasylan such as described above, for example, a residue with the formula 1 R F -alkyl- the formula 2 R F -alkyl-Si R S 2 —O—, the formula 3 aminoalkylaminoalkyl dhnasylan the formula 4 aminoalkylaminoalkylaminoalkyl, wherein in the formulas 1 to 4 R F is selected from mercapto, glycidoxy, amino e.
These problems can be mitigated or avoided according to the disclosure if molecules are added whose chemical structure is between those of the cited oligomeric siloxanes and those of the polydiorganosiloxanes, for example, of the polydimethylsiloxanes.
The index m can be selected within wide ranges according to the intended use, in general in such a manner that a silicone oil is obtained. EP-A describes the use of a condensation product of functional oligosiloxanes as primers for the adhesion buildup for example dgnasylan polyurethane-based adhesive substances and sealing substances on substrates.
The bridge residue can also be, e. However, UL assumes no responsibility or liability dynashlan the accuracy of the information contained on this website and strongly encourages that upon final product or material selection information is validated with the manufacturer.
The degree of condensation of the oligomeric siloxane, that is, the number of the monomeric silane cross-linkers condensed with each other, can vary in wide ranges according to the intended use but can be, e.
No possibilities for improving the homogeneity of the mixtures are shown.
US20150267094A1 – Silicone formulation with improved storage stability – Google Patents
Silicones are compositions which have been used as adhesives or sealants. 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.
Exemplary functionalizing 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.
A suitable area of application is, e. Those cases are exemplary in which an alkyl residue of dialkylketoxime stands for a methyl residue and the other alkyl residue of the dialkylketoxime for a methyl- ethyl- n-propyl- or for an iso-butyl residue. In the previous examples for R 2 and R 3 alkyl or alkoxy can be, e. As was previously explained, such polydimethylsiloxanes can be modified by the partial inclusion of other residues such as phenyl instead of methyl.
We’re sorry, but the industry you have selected is not currently available in your chosen language. In the previous examples alkyl or alkoxy can be, e. Exemplary fillers are calcium carbonates, calcined caolines, carbon black, highly dispersed silicic acids dynqsylan flame-retardant fillers such as hydroxides or hydrates, for example, hydroxides or hydrates of aluminum, for example, aluminum trihydroxide.
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.
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. The oligomeric siloxane can be formed, e.
DYNASYLAN – Brenntag product information page
As already explained, the structure of the oligomers formed can be complicated. Phase separations in the examples were visually observed. This took place by a careful drawing of the adhesive and by placing a cut vertically to the direction of drawing up to the clean base.
The adhesive remaining after the drawing-off of the silicone on the base is evaluated cohesion break. EP-A describes the usage of amino-functional oligosiloxanes as adhesion promoters in adhesive masses and sealing masses based on organopolysiloxanes and silane cross-linkers.
Suitable catalysts are commercially obtainable. The one- or two-component silicone formulation according to claim 1wherein the functionalized oligodimethylsiloxane is contained in an amount of 0.
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The one-or two-component synasylan formulations dynastlan accordance with the disclosure, for example, in the form of an RTV silicone, are suitable as elastic adhesives or sealants.
Mixtures of these oligomers with silicone oils display phase separation after a short time and are therefore not stable in storage.