摘要:
A composite article comprising a substrate and method for making the composite article are provided. A barrier layer is disposed on at least one surface of the substrate, wherein the barrier layer comprises a barrier coating and at least one repair coating disposed on the barrier coating. The repair coating is a conformal coating and comprises a metal or a metal based compound. An electroactive device and in one particular embodiment a light emitting device comprising the composite article are also provided. In another embodiment the invention comprises a barrier layer disposed on at least one surface of a substrate; wherein the barrier layer comprises a barrier coating and at least one repair coating.
摘要:
A barrier layer, a composite article comprising the barrier layer and a substrate, and a method for making the composite article are provided. The barrier layer is disposed on a surface of the substrate, wherein the barrier layer comprises a barrier coating and a repair coating disposed on the barrier coating. The repair coating comprises a metal based compound. An electroactive device comprising the composite article is also provided.
摘要:
Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce corrosion by physically removing or chemically decomposing the alkyl chloroformate impurities within the corrosion-resistant upstream sections of the apparatus.
摘要:
A silicone composition that includes at least one functionalized polydiorganosiloxane, at least one cure catalyst, at least one reactive diluant, and at least one thermally conductive filler is provided in the present invention. Further embodiments of the present invention include a method for substantially increasing the thermal conductivity of a silicone composition and a thermal interface material containing the aforementioned silicone composition.
摘要:
A method for forming a dialkyldichlorosilane, comprising reacting elemental silicon with an alkyl chloride using copper as a catalyst together with promoters zinc, tin, and a special promoter. The special promoter is silver, a silver compound, gold, a gold compound, or combinations thereof. The alkyl may be methyl such that the dialkyldichlorosilane is dimethyldichlorosilane and the alkyl chloride is methyl chloride. The reacting generates the dialkyldichlorosilane in accordance with a first selectivity for the dialkyldichlorosilane that exceeds a second selectivity for the dialkyldichlorosilane. The second selectivity is a selectivity for the dialkyldichlorosilane that would have existed had the special promoter been absent.
摘要:
A method for the preparation of tetraorganooxysilanes is provided which comprises reaction of a natural silicon dioxide source with an organo carbonate.
摘要:
A method is provided for improving alkylhalosilane selectivity in the direct method for making alkylhalosilane. There is introduced into the alkylhalosilane reactor, an effective amount of an organophosphine, such as trimethylphosphine, to enhance the formation of dialkylhalosilane during the direct reaction of alkylhalide and particulated silicon-copper contact mass.
摘要:
A carbon dioxide absorbent composition is described, including (i) a liquid, nonaqueous silicon-based material, functionalized with one or more groups that either reversibly react with CO2 or have a high-affinity for CO2; and (ii) a hydroxy-containing solvent that is capable of dissolving both the silicon-based material and a reaction product of the silicon-based material and CO2. The absorbent may be utilized in methods to reduce carbon dioxide in an exhaust gas, and finds particular utility in power plants.
摘要:
The invention relates to a polymer comprising structural units of formula and formula wherein R1, R2, R5 and R6 are independently hydrogen, a methyl group, or —COOH, only one of R1 and R2 or R5 and R6 is —COOH; R3 and R7 are independently hydrogen, or a methyl group; R4 is —COOH, —CONH2 or —OH, when R4 is —OH, R1, R2 and R3 are respectively hydrogen; and R8 is —COO, —CONH, or —O—, when R8 is —O—, R5, R6 and R7 are respectively hydrogen. Methods for preparing and using the polymer are also described herein.
摘要:
A catalyst composition is provided that includes a catalytic metal secured to a substrate, and the substrate is mesoporous and has pores that are templated. A catalyst composition includes a catalytic metal secured to a mesoporous substrate. The mesoporous substrate is a reaction product of a reactive solution, a solvent, a modifier, and a templating agent. A method for controlling nitrous oxide emissions including the catalyst composition comprising introducing a regeneration fuel into an exhaust stream upstream relative to the catalyst composition and heating the exhaust stream upstream relative to the catalyst composition. When the regeneration fuel is introduced the air/fuel ratio λ of an air/fuel mixture of a lean burn exhaust is greater than 1.