摘要:
The invention relates to a two-step melt process for the production of thermoplastic, solvent-free, low-branching polycarbonates with low --OH terminal group content using a self-cleaning high-viscosity reactor.
摘要:
The invention relates to a transesterification process for the production of thermoplastic, solventless oligo-/polycarbonates in which aromatic diphenols and carbonic acid diaryl esters are combined and reacted in gaseous form.
摘要:
The present invention provides a melt process for the manufacture of thermoplastic solvent-free polycarbonates with the use of a continuously operated tubular reactor for monophenol vaporization.
摘要:
A continuous process for producing oligocarbonate is disclosed. The process entails in sequence the steps of a) reacting a dihydroxyaryl compound with a diaryl carbonate in the presence of a catalyst to obtain a melt and avoiding removal of released monohydroxyaryl compound and b) withdrawing the monohydroxyaryl compound by flash evaporation and c) heating the melt obtained under vacuum in an evaporator equipped with sump receiver and d) repeating at least once steps b) and then c) each at gradually increased temperatures and lowered pressures.
摘要:
An occupant detection system and method that uses an isolation assembly to isolate electrically a power supply providing power to a heater element for heating a vehicle seat from a sensing circuit that uses the heater element as an electrode for electric field or capacitance type occupant detection. The isolation assembly includes a common mode choke that by itself provides sufficient isolation when the sensing circuit excitation signal frequency is high enough, and provides switches that infrequently interrupt electrical power to the heater element so a humidity level can be determined using a relatively low excitation signal frequency. Knowing the humidity level is desirable to adjust a threshold use to determine if the sensing circuit indicates that the seat is empty, or is occupied.
摘要:
A computer system determines a first criticality relating to frequency of execution of computer programs, a second criticality relating to frequency of execution of transactions, a third criticality relating to a number of users who execute the transactions, a fourth criticality relating to programs that modify the database tables having a large change in data, and a fifth criticality relating to the amount to time that each computer program is executed and the amount of time that each transaction is executed. The system determines intersections among the criticalities, and assigns a weighted value to each of the intersections. The system determines an overall criticality for a particular computer program or a particular transaction. The overall criticality is a function of the number of intersections in which the particular computer program or the particular transaction appears and the weighted values assigned to the intersections.
摘要:
Fixed-dried blood cells carrying an active agent are described, along with methods of making the same, methods of using the same, and compositions containing the same. The blood cells are preferably blood platelets.
摘要:
The invention relates to a box (1) for accommodating and laying optical waveguides and/or copper conductors, with the box (1) comprising at least one housing (10) and at least one cover (20), with the cover (20) being attached to the housing (10) such that it can pivot, with the cover (20) being attached to the housing (10) such that it can be detached, with the cover (20) having at least one receptacle for a pin element (90), with the housing (10) having at least one pin element (90), it being possible for the at least one pin element (90) to be held by means of the receptacle for a pin element (90), and it being possible for the at least one pin element (90) to be displaced parallel to a pivot axis relative to the holding element (80).
摘要:
An etching device is provided, the etching device including a process chamber including an etchant, a structure configured to provide a laminar flow of the etchant, and a workpiece handler configured to move a workpiece through the laminar flow of the etchant along a predefined track.