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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As previously explained, mixtures of oligomeric silane cross-linkers with silicone oils display phase separation after a short time and are therefore not stable in storage, which is associated with other disadvantages.
Phase separations in the examples were visually observed.
US20150267094A1 – Silicone formulation with improved storage stability – Google Patents
In the previous examples for R 2 and R 3 alkyl or alkoxy can be, e. 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.
During the peeling test, a cut was made at the end of the coated float glass just above the adhesive surface. You may choose a language below to continue to this industry or close this dialog above.
A suitable area of application is, e. It is apparent from these tables that functional oligomeric siloxanes show phase separation after mixing with silicone oils and that the properties of a corresponding silicone formulation become poorer after storage. The functionalized oligodimethylsiloxane can be present in an amount of 0.
JP relates to a silicone formulation comprising an organopolysiloxane with hydroxy- or alkoxy residues, a hydrolysable silane or a partial hydrolysate of it and a dimethyl siloxane containing hydroxyl or alkoxy residues and with a degree of polymerization of The index m can be selected in such a manner that the polydiorganosiloxane has the viscosity indicated in the following.
Exemplary fillers are calcium carbonates, calcined caolines, carbon black, highly dispersed silicic acids and flame-retardant fillers such as hydroxides or hydrates, for example, hydroxides or hydrates of aluminum, for example, aluminum trihydroxide. However, UL assumes no responsibility or liability for 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.
Silicones are compositions which have been used as adhesives or sealants.
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 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.
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.
It was surprisingly found that the addition of certain functionalized oligodimethylsiloxanes improves the miscibility of functional oligosiloxanes with silicone oils. R 8 is a bivalent alkylene residue, e. The silicone formulation, for example, the one-component silicone formulation contains, e. We’re sorry, but the industry you have selected is not currently available in your chosen language.
The degree of condensation or degree of polymerization of the functionalized oligodimethylsiloxane can vary in wide ranges according to dyynasylan intended use but can be, e. The functionalized oligodimethylsiloxane is present, for example, in the same component as the oligomeric siloxane. These oligomeric siloxanes cannot dyasylan mixed or only poorly mixed with traditional polydiorganosiloxanes, for example polydimethylsiloxanes. Suitable terminal functional residues are those used in the art.
Concrete examples 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. Exemplary ketoxime residues and alkoxy residues have already been previously described. 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 dyhasylan a two-component RTV silicone is also designated as an RTV 2 silicone.
R 5 can be hydroxy.
EP-A refers to the production of aqueous silane polymers in which the functional silanes are used as stabilizers. A method of applying a formulation, comprising: Such silicones can be formed as one- or two-component silicone formulations and contain as main components a polyorganosiloxane and a cross-linker. 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.
As was previously explained, such polydimethylsiloxanes can be modified by the dynssylan inclusion of other residues such as phenyl instead of methyl. In the case of the two-component silicone formulation, it is exemplary that the first component or polymer component A comprises the at least one polydiorganosiloxane and the second component or hardener component B comprises the at least one oligomeric siloxane and the at least one functionalized oligodimethylsiloxane.
Oligomeric siloxanes are used in 2-component silicone formulations as cross-linkers usually dynasylah only in the hardener component and can be there in amounts of 0.
Dynasylan® – the brand for Functional Silanes
The storage was halted after 6 months when no phase separation was able to be observed up to then. The one- or two-component silicone formulation according to claim 1wherein the degree of condensation of the functionalized oligodimethylsiloxane is in the range of 10 to For example, the functionalized oligodimethylsiloxane does not have more than 20, for example, not more than 10 terminal or side functionalizing residues.
The information presented here was acquired by UL from the producer of the product or material or original information provider. The one- or two-component silicone formulation therefore furthermore comprises a functionalized oligodimethylsiloxane.
The functionalizing residue can also contain two or more functionalizing residues, e. Curable polymer composition and method for preparing curable polymer composition. It can be advantageous to use a mixture of different fillers. Vinylmethylmethoxysilyl- terminated Functionalized poly dimethylsiloxaneFunctional oligodimethyl- Ex.