| 摘要 |
<p>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.</p> |
