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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The subscript n stands for 0, 1 or 2, for example, 1.
Dynasylan® – Hydrophobic Diaminofunctional Silane (55 lb. Pail)
The one- or two-component silicone formulation according to claim 1wherein the oligomeric siloxane is contained in a one-component silicone formulation in an amount of 0. The one- or two-component silicone formulation according to claim 1wherein the silicone formulation is an adhesive or a sealant.
The bridge residue can be, e. According to one aspect, a one- or two-component silicone formulation is provided, comprising:. 11146 describes the usage of amino-functional oligosiloxanes as dynasykan promoters in adhesive masses and sealing masses based on organopolysiloxanes and silane cross-linkers. A method of using the one- or two-component dyynasylan formulation according to claim 6comprising mixing the polymer component A with the hardener component B.
Formulations containing functional oligosiloxanes, that is, dtnasylan of functional silanes are also used. 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.
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. Two-component silicone formulations are condensation-cross-linking RTV 2 systems and addition-cross-linking RTV 2 systems, wherein according to the disclosure, condensation-cross-linking two-component silicone formulations are exemplary as two-component systems.
Examples for the functionalizing residues are mercapto, glycidoxy, amino e. The reaction between the functional residue dynassylan the polydiorganosiloxane and of the functional residue of the cross-linker can take place by a condensation reaction. Exemplary ketoxime residues and alkoxy residues have already been previously described. The one- or two-component silicone formulation according to claim 1wherein the polydiorganosiloxane is a hydroxy-terminated polydimethylsiloxane. The viscosities indicated here and in the following can be determined in accordance with DIN 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.
R 8 is a bivalent alkylene residue, e. EP-A refers to the production of aqueous silane polymers in which the functional silanes are dynasyllan as stabilizers.
Monomeric silane cross-linkers can have, e. 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. These 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. The polymer component used for the test has the following composition:.
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. Such silicones can be formed as one- or two-component silicone formulations and contain as main components a polyorganosiloxane and a cross-linker. Thus, it will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
For example, the functionalized oligodimethylsiloxane does not have more than 20, for example, not more than 10 terminal or side functionalizing residues. What is claimed dnasylan The polydiorganosiloxanes are cross-linkable polydiorganosiloxanes. EP-A describes the use of a condensation product of functional oligosiloxanes as primers for the adhesion buildup for example of polyurethane-based adhesive substances and sealing substances on substrates. Dynqsylan polydiorganosiloxanes are polydimethylsiloxanes with functional terminal residues such as hydrido, hydroxy- alkoxy- acetoxy- and ketoxime residues, wherein hydroxy residues are exemplary.
The functionalizing residue can be, e. Such oligomeric siloxanes are commercially available, e.
DYNASYLAN® by Evonik Resource Efficiency GmbH, BL Silanes – Adhesives & Sealants
This is surprisingly the case with functionalized oligodimethylsiloxanes, whose structure is substantially chain-shaped or star-shaped, that is, rather 2-dimensional. Concrete dynaylan for the functionalizing residue, that is bound to an Si atom of oligodimethylsiloxane, are 3-aminopropyl, 2-aminoethylaminopropyl, 2-aminoethylaminoethylaminopropyl, EO-alkyl polyethylene glycolalkyl, e.
The mixture was applied with a layer thickness of ca. Reference is made to the previously described exemplary ketoxime residues as examples of oxime residues. Self-adhering polyorganosiloxane elastomer compositions and method for preparing same.
Organopolysilozane compositions crosslinkable with elimination of alcohols to give elastomer. 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.
The person skilled in the art is familiar, as a function of the initial formulation and the intended use, with the selection of suitable additives and with the amount to be added for the particular component.