Abstract:
A cure catalyst is provided. The cure catalyst may include a Lewis acid and one or both of a nitrogen-containing molecule or a non-tertiary phosphine. The nitrogen- containing molecule may include a mono amine or a heterocyclic aromatic organic compound. A curable composition may include the cure catalyst. An electronic device may include the curable composition. Methods associated with the foregoing are provided also.
Abstract:
A method is described for the simultaneous preparation of p-bromophenols and p-benzoquinones, intermediates useful in the preparation of hydroquinones and 4,4’-dihydroxybiphenyls, respectively. Hydroquinones and 4,4’-dihydroxybiphenyls are useful monomers for the preparation of a variety of polymers. The method also comprises reducing the p-benzoquinone to its corresponding hydroquinone in the presence of the p-bromophenol. Limiting the amount of HBr present in the reaction mixture was shown to control the amount of benzoquinone produced. The method also allows for the recycling of many of the reagents used, thereby reducing the cost of producing each monomer.
Abstract:
Brominated hydroxyaromatic compounds such as p-bromophenol are prepared by contacting a hydroxyaromatic compound with oxygen and a bromine source such as hydrogen bromide or an alkali metal or alkaline earth metal bromide in an acidic medium, in the presence of elemental copper or a copper compound as catalyst. The brominated product of this reaction may be converted alternately to a dihydroxyaromatic compound such as hydroquinone by hydrolyses, or a dihydroxybiphenyl compound such as 4,4’-dihydroxybiphenyl by reductive coupling.
Abstract:
An underfill composition including a polymer precursor is provided. The polymer precursor includes (4) or more pendant oxetane functional groups. The underfill composition includes greater than about (20) weight percent of the polymeric precursor. Associated article and method are also provided.
Abstract:
A syneretic composition is provided. The syneretic composition includes a first curable material comprising an alcohol and an anhydride, and a second curable material. At a first temperature (T 1 ) the first curable material cures to form a polymeric matrix, and the second curable material has a degree of conversion that is less than 50 percent. The second curable material is liquid and capable of exuding from the polymeric matrix at a syneresis temperature (T syn ). A method and an article are provided also.
Abstract translation:提供了一种综合组合物。 该共同组合物包括包含醇和酸酐的第一可固化材料和第二可固化材料。 在第一温度(T 1→1)下,第一可固化材料固化形成聚合物基质,第二可固化材料的转化度小于50%。 第二可固化材料是液体的并且能够以脱水收缩温度(T> syn syn)从聚合物基质中渗出。 还提供了一种方法和物品。
Abstract:
An underfill composition including a polymer precursor is provided. The polymer precursor includes an inorganic backbone and one or more pendant oxetane functional groups. Associated article and method are also provided.
Abstract:
A B-stageable film that includes a thermal interface material is provided. The film may secure a heat-generating device to a heat-dissipating component, may further cross-link, and may conduct thermal energy from the heat-generating device to the heat-dissipating component. A method of making and using the film is provided, as well as a device that incorporates the film.
Abstract:
Disclosed are methods for forming an electronic device that comprises a material that functions as an underfill material as well as a thermal interface material simultaneously. The electronic assembly comprising a heat dissipating element, a semiconductor chip, a substrate and a thermally conductive material is also given here, wherein the thermally conductive material serves as an underfill material as well as a thermal interface material simultaneously.
Abstract:
A composition comprises a first curable resin composition that includes at least one aromatic epoxy resin in combination with a solvent, a functionalized colloidal silica dispersion, and at least one other component selected from the group consisting of cycloaliphatic epoxy monomers, aliphatic epoxy monomers, hydroxy aromatic compounds, combinations thereof, and mixtures thereof. The composition can include a separate second curable fluxing composition that comprises at least one epoxy resin. The first curable resin or the combination of the two resin compositions is useful in producing underfill materials and is suitable for use as an encapsulant for electronic chips.