摘要:
The present invention relates to polyurethane, and specifically relates to a polyurethane microcellular elastomer, a method for preparing the same, and the use thereof. The polyurethane microcellular elastomer is the reaction product of (1) an isocyanate-terminated prepolymer obtained by reacting an isocyanate with a first polyol, (2) a second polyol, (3) a chain extender and (4) a catalyst, wherein the first polyol and/or second polyol comprise at least one polycarbonate polyol obtained by reacting carbon dioxide with an alkene oxide. This method of preparing polyurethane microcellular elastomer can not only reduce the demand for raw materials derived from petrochemicals, but also realize the utilization of the “greenhouse gas” carbon dioxide.
摘要:
A waveguide liner for an analyzer magnet chamber having three interlocking pieces of graphite, the liner pieces having sufficient size to allow them to stand freely without being secured, said liner pieces providing case of interchange and replacement in a Kestrel analyzer magnet chamber.
摘要:
A housing structure includes a main cabinet and a fixing mechanism. The main cabinet has an opening formed thereon and includes a side panel and a front panel. A groove is formed on the edge portion of the front panel adjacent to the side panel. A receiving slot is formed on the front panel and adjacent to the groove. The fixing mechanism includes a latch and an elastic member. The latch may be movably disposed on the side panel. A first hook is formed on the latch. When covering the opening with the side panel, the latch is abutted by the front panel. The restoration of the elastic member interlocks the side panel to the front panel securely to close the housing structure.
摘要:
The present invention pertains to a polyurethane with improved abrasion resistance. The reactive component for preparing the polyurethane includes a polybutadiene, wherein the polybutadiene comprises 1,2-butene structure unit, 2,3-(cis) butene structure unit and 2,3-(trans) butene structure unit, wherein the amount of the 2,3-(trans) butene structure unit is more than the amount of the 2,3-(cis) butene structure unit. The polyurethane presented in this invention possesses improved abrasion resistance and good surface quality.
摘要:
A housing structure includes a main cabinet and a fixing mechanism. The main cabinet has an opening formed thereon and includes a side panel and a front panel. A groove is formed on the edge portion of the front panel adjacent to the side panel. A receiving slot is formed on the front panel and adjacent to the groove. The fixing mechanism includes a latch and an elastic member. The latch may be movably disposed on the side panel. A first hook is formed on the latch. When covering the opening with the side panel, the latch is abutted by the front panel. The restoration of the elastic member interlocks the side panel to the front panel securely to close the housing structure.
摘要:
The present invention relates to a polyurethane with improved abrasion resistance. The reaction components comprise a certain content of polyisoprene. The polyurethane presented in this invention possesses improved abrasion resistance and good surface quality.
摘要:
Selecting an installation rack for a device in a data center including obtaining physical size and power of the device; judging, according to the physical size and power of the device, whether rack space, rack total power, and rack unit power density of a rack in the data center satisfy predetermined requirement after the device is added into the rack; and selecting a rack that satisfies the predetermined requirement as an installation rack.