Abstract:
The invention discloses a cross-linked epoxy resin with flame-retardant properties and method for producing the same. The polymeric material of the invention includes an epoxy resin, a curing agent and a modification agent. Particularly, the modification agent is a derivative of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO). Moreover, the curing agent is 4,4′-diaminodiphenyl methane (DDM), or tris(4-aminophenyl)amine (NNH).
Abstract:
A series of novel phosphorus-containing compounds having the following formula are disclosed: wherein Q, R5, Ar1, Ar2, A, and B are as defined in the specification. The present invention provides a process for the preparation of the compound of formula (I). The present invention also provides a compound of formula (PA) and a process for preparing the same. The present invention further provides a compound of formula (PI) and a process for preparing the same.
Abstract:
A method of manufacturing new materials for a printed circuit board and Low-Earth Orbit (LEO) spacecraft is provided. The present invention includes dinitro, diamine, various phosphorous-containing polyimides and polyamides, and synthesizing methods thereof. The polymers of the embodiment of present invention exhibit good flame retardancy, high glass transition temperature, good mechanical properties and superior oxygen resistance, so they are good materials for Low-Earth Orbit applications. Besides, these polymers can also be used as matrix for halogen-free flexible printed circuit board.
Abstract:
A flame-retardant epoxy resin was prepared by reacting an active-hydrogen-containing phosphorus compound with a di- or poly-functional epoxy resin via an addition reaction between the active hydrogen and the epoxide group, is suitable for printed circuit board and semiconductor encapsulation applications. The active-hydrogen-containing phosphorus compound is 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide having a chemical structure as follows:
Abstract:
Phosphorus-containing benzoxazine-based bisphenols and derivatives thereof are disclosed. The phosphorus-containing benzoxazine-based bisphenols are prepared by reacting DOPO with benzoxazine to form the phosphorus-containing benzoxazine-based bisphenols. The phosphorus-containing benzoxazine-based bisphenols can further to form advanced epoxy resins. The advanced epoxy resins can further be cured to form flame retardant epoxy thermosets.
Abstract:
Disclosed is a method for making a low-k, flame-retardant, bi-functional benzoxazine. The method includes the steps of dissolving phosphoric diamine with various functional groups, phenolic adamantane and paraformaldehyde in a solvent at 72° C. to 88° C. for 7 to 9 hours, and cooling and introducing the solution in n-hexane to separate the low-k, flame-retardant, phosphoric, bi-functional benzoxazine.
Abstract:
The present invention provides a method for preparing a phosphorus-containing bexzoxazine resin having the following structure shown as the formula (I) or (V): wherein, R1˜R4 respectively comprise one selected from the group consisting of hydrogen, C1˜C6 alkyl, C3˜C6 cyclic alkyl, and phenyl.
Abstract:
The invention discloses a novel cross-linked epoxy resin with flame-retardant properties and method for producing the same. The polymeric material of the invention includes an epoxy resin, a curing agent and a modification agent. Particularly, the modification agent is a derivative of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-Oxide (DOPO). Moreover, the curing agent is 4,4′-diaminodiphenyl methane (DDM), or tris(4-aminephenyl)amine (NNH).
Abstract:
A method and system for detecting an insufficient coverage location in a mobile network is provided to detect the insufficient coverage location in a systematic and efficient way. The method generates a corresponding cell list for a registered address of a subscriber of the mobile network, where the cell list comprises at least one cell that potentially covers the registered address. Next, the call detail record (CDR) entries associated with the cell list are extracted. Then, it is determined whether the registered address is an insufficient coverage location of the mobile network according to the error codes included in the extracted CDR entries.
Abstract:
A series of novel phosphorus-containing compounds having the following formula are disclosed: wherein R1-R12, A, B, D, X, and Y are as defined in the specification. A process for the preparation of the compound of formula (1), a curing agent, and a flame resistant epoxy resin and a preparation process thereof are also provided.