摘要:
Water dispersible or water soluble porous bodies comprising a three dimensional open-cell lattice containing 10 to 95% by weight of a polymeric material which is soluble in water, and, less than 5% by weight of a surfactant, said porous bodies having an intrusion volume as measured by mercury porosimetry (as hereinafter described) of at least about 3 ml/g, and, with the proviso that said porous bodies are not spherical beads having an average bead diameter of 0.2 to 5 mm. And a method for making the same comprising the steps of: providing an intimate mixture of the polymeric material and any surfactant in a liquid medium: providing a fluid freezing medium at a temperature effective for rapidly freezing the liquid medium; cooling the liquid medium with the fluid freezing medium at a temperature below the freezing point of the liquid medium for a period effective to rapidly freeze the liquid medium; and freeze-drying the frozen liquid medium to form the porous bodies by removal of the liquid medium by sublimation.
摘要:
Water dispersible or water soluble porous bodies comprising a three dimensional open-cell lattice containing (a) 10 to 95% by weight of a water soluble polymeric material and (b) 5 to 90% by weight of a surfactant, said porous bodies having an intrusion volume as measured by mercury porosimetry of at least about 3 ml/g with the proviso that said porous bodies are not spherical beads having an average bead diameter of 0.2 to 5 mm
摘要:
The present invention relates to porous beads and to methods of production thereof, in particular to a method of producing hydrophilic polymeric beads by freeze-drying a droplet containing a polymeric material in a continuous phase of an oil-in-water (O/W) emulsion.
摘要:
The present invention relates to a branched vinyl polymer carrying dendrons made from monofunctional vinyl monomers and branched by virtue of difunctional vinyl monomers so that there is on average one branch or fewer per polymer chain to avoid gelation. The polymer may be made by chain-growth polymerization of predominantly monofunctional vinyl monomers in the presence of difunctional vinyl monomers and dendron units.
摘要:
The present invention relates to a branched vinyl polymer carrying dendrons made from monofunctional vinyl monomers and branched by virtue of difunctional vinyl monomers so that there is on average one branch or fewer per polymer chain to avoid gelation. The polymer may be made by chain-growth polymerization of predominantly monofunctional vinyl monomers in the presence of difunctional vinyl monomers and dendron units.
摘要:
A device is provided to serve as a port for arthroscopic procedures. The device may include a cannula defining a lumen, with a partition extending the length of the cannula and dividing the lumen into two compartments. The surgeon may use one compartment for instrumentation such as an arthroscope or other surgical instruments, and the second compartment for suture and related suture instruments. This may enable the surgeon to keep untied sutures and the like separate from other surgical instruments and prevent tangling, etc.
摘要:
This invention relates to a gas hydrate (often referred to as a clathrate) comprising a water-in-gas emulsion (egdry-water (DW)) and an enclathrated exogenous gas such as for example methane, natural gas, hydrogen or carbon dioxide.
摘要:
A method for preparing a conjugated microporous polymer comprises the coupling of an alkynyl aryl monomer having a plurality of terminal alkyne groups with an iodo- or bromo-aryl monomer having a plurality of halogen atoms in the presence of a palladium (0) catalyst. The conjugated microporous polymer comprises nodes comprising at least one aryl unit and struts comprising at least one alkyne unit and at least one aryl unit, wherein a node is bonded from its aryl unit or units to at least two struts via alkyne units. Such polymers are useful in numerous areas such as separations, controlled release, gas storage and supports for catalysts.
摘要:
A tent having at least a frame and a canopy. The said frame includes a base member defining an outer periphery, and at least a pair of arch members spanning the base member. The base member being captive in the canopy, around a lower peripheral edge thereof. The arch members being captive in the canopy over the base member. The canopy being dimensioned so as to maintain tautness between the base member and the arches.
摘要:
A method of storing and viewing a collection of digital images includes the steps of: providing a plurality of users with a unique user ID associated with a URL identifying a network photoservice provider; providing each one of the plurality of users with a separate password to the unique user ID; at least one of the plurality of users transferring a set of digital images to the unique user ID employing their separate passwords; and viewing the images located at the unique user ID using the separate password.