Abstract:
Provided is a porous body, which is formed of a resin obtained by crosslinking a copolymer of ethylene, an α-olefin, and a non-conjugated diene, wherein porosity of the porous body is in the range of 50 to 95% by volume, strength of the porous body at 50% compression is 300 kPa or less, and compression set (A) under atmosphere at a temperature of 80° C. and a relative humidity of 90% is 20% or less.
Abstract:
A porous stamp material allows only resin in a region thereof irradiated with a laser beam during laser engraving in a production process of an ink stamp to be burnt and vaporized while preventing melting in any other unwanted region. The porous material for ink stamps comprises: at least one thermoplastic resin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-alpha-olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene-acrylic copolymer; at least one thermoplastic elastomer selected from a plurality of different hydrogenated styrene based thermoplastic elastomers; and at least one filler selected from a plurality of different inorganic compounds, wherein the thermoplastic resin and/or the thermoplastic elastomer are cross-linked, and formed in a continuous pore structure.
Abstract:
A method for fabricating a porous structure from a first material. The method comprises the acts of mixing the first material with a second material to form a mixture, the first material having a melting point which is lower than the second material, heating the mixture under pressure to a temperature between a melting point of the first material and a melting point of the second material, cooling the molten mixture until it hardens and removing the second material from the first material. The method may also include a subsequent annealing step. There is also described a material suitable for implant, illustratively vertebral or spinal implants, comprising a rigid biocompatible polymer such as PEEK comprising a plurality of interconnected pores. The polymer illustratively has a porosity of between 50% and 85% by volume and in a particular embodiment is able to withstand pressures of up to 20 MPa. The porous PEEK material may also have a minimum thickness in any dimension of one (1) inch.
Abstract:
A short term controlled release composition which comprises poly(lactic-co-glycolic acid) cross-linked alendronate (PLGA-ALN) is provided. The PLGA-ALN is constructed into 3D scaffolds (PLGA-ALN-3D) with pores size of 150-300 μm and average porosity of 85%, or microspheres (PLGA-ALN-M) with 50-100 μm in diameter. The released alendronate concentration is in the range of 5×10−7 M to 5×10−8 M.
Abstract:
The present invention includes compositions, methods, systems of making a composition that includes one or more active agent; a recognitive polymeric matrix; and a porosigen, wherein the composition comprises a porous recognitive, swellable hydrogel that dissociates under conditions of low water or humidity.
Abstract:
Poly(propylene fumarate) is copolymerized with poly(caprolactone) diol to produce a block copolymer of poly(propylene fumarate) and poly(ε-caprolactone). The biocompatible and bioresorbable block copolymer of poly(propylene fumarate) and poly(ε-caprolactone) is useful in the fabrication of injectable and in-situ hardening scaffolds for tissue and/or skeletal reconstruction. The block copolymer can be crosslinked by redox or photo-initiation, with or without an additional crosslinker. Thus, the copolymer is both self-crosslinkable (without the use of any crosslinkers) and photocrosslinkable (in the presence of UV light).
Abstract:
Embodiments herein described provide devices for identifying and collecting rare cells or cells which occur at low frequency in the body of a subject, such as, antigen-specific cells or disease-specific cells. More specifically, the devices are useful for trapping immune cells and the devices contain a physiologically-compatible porous polymer scaffold, a plurality of antigens, and an immune cell-recruiting agent, wherein the plurality of antigens and the immune cell recruiting agent attract and trap the immune cell in the device. Also provided are pharmaceutical compositions, kits, and packages containing such devices. Additional embodiments relate to methods for making the devices, compositions, and kits/packages. Further embodiments relate to methods for using the devices, compositions, and/or kits in the diagnosis or therapy of diseases such as autoimmune diseases or cancers.
Abstract:
A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature below a melting point of the polymer and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
Abstract:
A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature below a melting point of the polymer and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.