摘要:
In some aspects, a mobile application package is bound to a privileged component of a mobile device operating system. The mobile application package includes a software virtualization layer and a management service component. The software virtualization layer and the management service component are enabled to execute in a privileged mode based on the privileged component. A virtual phone image is downloaded from a management server. A virtual machine based on the virtual phone image is launched by the software virtualization layer.
摘要:
The present invention relates to a novolac hardener having an alkoxysilyl group, the novolac hardener exhibiting excellent heat resistance characteristics, such as a low coefficient of thermal expansion (CTE) and an increase in the glass transition temperature, when forming a composite; a method for preparing the same; a composition containing the same; a hardened product; and a use thereof. According to an embodiment of the present invention, provided are a novolac hardener having an alkoxysilyl group of chemical formulas I-1 to I-4; a method for preparing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to 1-4 through alkenylation and alkoxysilylation of the novolac hardener; a method for preparing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to 1-4 through alkoxysilylation of the novolac hardener; a composition containing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to I-4; a hardened product thereof; and a use thereof. A composite comprising the novel hardener having an alkoxysilyl group according to the present invention exhibits a low CTE and a high glass transition temperature through a chemical bond between the alkoxysilyl group of the hardener and a phenol or epoxide group as well as a chemical bond between the alkoxysilyl group of the hardener and a filler.
摘要:
A curable epoxy resin composition, upon curing, has a clarity value of at least 30% and provides improved impact strength while maintaining glass transition temperature; and a process of preparing the curable epoxy resin composition.
摘要:
The present invention relates to a thermally and electrically conductive adhesive composition, which includes (A) an electrically conductive filler, (B) an epoxy resin, (C) a reactive diluent, and (D) a curing agent, wherein the electrically conductive filler (A) is a silver powder having an average particle diameter of 1 to 10 µm, the epoxy resin (B) has two or more epoxy functional groups and aromatic rings in each molecule, the reactive diluent (C) is a compound having two or more glycidyl ether functional groups in an aliphatic hydrocarbon chain and also having a molecular weight of 150 to 600, and the curing agent (D) is a compound having two or more phenol functional groups in each molecule, a compound having two or more aniline functional groups in each molecule, or a mixture of these compounds, and the content of each of the electrically conductive filler (A), the epoxy resin (B), the reactive diluent (C), and the curing agent (D) is within a specific range. The thermally and electrically conductive adhesive composition of the present invention has high thermal conductivity and stable electrical conductivity.
摘要:
The present invention relates to a novolac hardener having an alkoxysilyl group, the novolac hardener exhibiting excellent heat resistance characteristics, such as a low coefficient of thermal expansion (CTE) and an increase in the glass transition temperature, when forming a composite; a method for preparing the same; a composition containing the same; a hardened product; and a use thereof. According to an embodiment of the present invention, provided are a novolac hardener having an alkoxysilyl group of chemical formulas I-1 to I-4; a method for preparing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to 1-4 through alkenylation and alkoxysilylation of the novolac hardener; a method for preparing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to 1-4 through alkoxysilylation of the novolac hardener; a composition containing the novolac hardener having an alkoxysilyl group of chemical formulas I-1 to I-4; a hardened product thereof; and a use thereof. A composite comprising the novel hardener having an alkoxysilyl group according to the present invention exhibits a low CTE and a high glass transition temperature through a chemical bond between the alkoxysilyl group of the hardener and a phenol or epoxide group as well as a chemical bond between the alkoxysilyl group of the hardener and a filler.
摘要:
Structural adhesives are prepared from an elastomeric toughener that contains urethane and/or urea groups, and have some terminal isocyanate groups that are capped with a phenol and other terminal isocyanate groups that are capped with a hydroxy-functional acrylate or a hydroxy-functional methacrylate. In certain embodiments, the presence of both types of capping on the toughener leads to higher impact peel strengths and a greater level of cohesive failure, than when the toughener is capped with a phenol an hydroxy-functional acrylate or hydroxy-functional methacrylate alone.
摘要:
Thermosetting resin compositions are provided that are useful for mounting onto a circuit board semiconductor devices, such as chip size or chip scale packages (“CSPs”), ball grid arrays (“BGAs”), land grid arrays (“LGAs”) and the like (collectively, “subcomponents”), or semiconductor chips. Reaction products of the compositions are controllably reworkable when subjected to appropriate conditions.
摘要:
Epoxy adhesive compositions contain a heat-activatable catalyst. The heat-activatable catalyst includes a tertiary amine catalyst and a novolac resin that has a weight average molecular weight of at least 3000. One-component epoxy adhesive formulations that contain the heat-activatable catalyst have unexpectedly good storage stability.