Abstract:
The present application relates to methods of producing poly(carborane-co-siloxane) polymers, and to polymers produced by such methods. The methods involve reacting a siloxane compound having at least two Si-OR° bonds with an organohydrosiloxane compound having at least two Si-H bonds in the presence of a Lewis acid catalyst containing boron, wherein the siloxane and/or organohydrosiloxane comprise a divalent carboranyl group.
Abstract:
A method of making a metallosiloxane, borosiloxane, or borometalosiloxane resin, optionally phosphorylated and formed into a powder or flakes is described along with a use thereof as a halogen-free, flame retardant for a plastic or polymer composite. This method comprises the steps of: providing a first mixture comprising an alkoxysilane intermediate, optionally a solvent, and optionally a metal-containing material, wherein the alkoxysilane intermediate is capable of forming at least one Si-O-Metal or Si-O-B bond. Adding an alkyl- or aryl-alkoxysilane, and optionally a boron-containing material, and optionally a catalyst, to the first mixture to form a second mixture; allowing the second mixture to react under agitation at a predetermined temperature to form a third mixture comprised of a metallosiloxane, borosiloxane, or borometalosiloxane resin, an alkyl alcohol, and optionally the aromatic solvent; and removing the alkyl alcohol from the third mixture as it is formed during the reaction of the second mixture. At least one of the first and second mixtures includes a metal-containing material or a boron-containing material. Optionally, the aromatic solvent is stripped away from the resin; and optionally a powder or flakes is formed out of the resin.
Abstract:
In order to enable various applications of non-Newtonian fluids, which are not hitherto possible as a result of the difficult handling ability of such fluids, a method for producing a non-Newtonian fluid is proposed, in which at least one starting material that can be cross-linked to form a non-Newtonian fluid and a solvent, in which a cross-linking agent for cross-linking the starting material is dissolved, are provided, wherein the solvent has an inhibiting effect on the cross-linking of the polymer. These components are mixed and the solvent is removed from the mixture, whereby the cross-linking agent is released in the mixture and the polymer is cross- linked by means of the cross-linking agent.
Abstract:
The invention relates to silicone resins comprising metallosiloxane which contains Si-O-Metal bonds or borosiloxane containing Si-O-B bonds and potentially Si-O-Si and/or B-O-B bonds. It also relates to the preparation of such silicone resins and to their use in thermoplastic or thermosetting organic polymer or rubber or thermoplastic/rubber blends compositions to reduce the flammability or enhanced scratch and/or abrasion resistance of the organic polymer compositions. It further relates to coatings made of such silicone resins for scratch resistance enhancement or flame retardant properties.
Abstract:
A borosiloxane composition comprising a borosiloxane having an average of at least two alkenyl groups per molecule, an organosilicon compound having an average of at least two silicon-bonded hydrogen atoms per molecule, and a hydro silylation catalyst; a borosiloxane adhesive comprising a cured product of at least one borosiloxane; and a coated substrate and a laminated substrate, each comprising the borosiloxane adhesive.
Abstract:
A crosslinked polymer and process of making it are disclosed. A copolymer having at least one alkyne group, carborane group, and alkylsiloxane group is reacted with a siloxane crosslinker in a hydrosilation reaction. This produces a crosslinked polymer where the crosslink sites are reacted alkyne groups.