A method for making water-absorbing polymer particles is provided and includes providing crosslinkers, polymerizable monomers and inorganic solid particles. The average closest distance between two neighboring crosslinkers (R.sub.XL) in a water-absorbing polymer particle for a specific X-load of the water-absorbing polymer particle is calculated via the formula below:

[00001]$\begin{array}{cc}\mathrm{Rxl}={\left(\frac{\left(\frac{1}{\mathrm{rho\_dry}}+\frac{\mathrm{x\_L}}{\mathrm{rho\_liq}}\right)}{N_A.Math.\underset{i}{.Math.}.Math.\frac{{\mathrm{w\_xl}}_i}{{\mathrm{Mr\_CXL}}_i}}\right)}^{\frac{1}{3}}& \left(I\right)\end{array}$ with x_L being the amount of liquid absorbed in the water-absorbing polymer particle in g liq/g water-absorbing polymer particle, rho_liq being the density at room temperature of the fluid that swells the water-absorbing polymer particle (generally saline of 0.9% w NaCl) in g/cm.sup.3, rho_dry being the true density of the dry water-absorbing polymer particle in g/cm.sup.3, Mr_CXL being the molar mass of the crosslinkers in g/mol, w_xl being the weight ratio of crosslinkers in dry water-absorbing polymer particle, N.sub.A being the Avogadro's number in mol.sup.−1.

The present invention relates to a super-absorbent polymer having excellent properties, both centrifugal retention capacity (CRC) and absorption under pressure (AUP) having been improved by introducing a surface crosslinked layer crosslinked by surface-modified inorganic particles, and to a method for preparing the same. The super-absorbent polymer comprises: a base resin powder containing a crosslinked polymer of water-soluble ethylene-based unsaturated monomers having an at least partially neutralized acidic group; and a surface crosslinked layer formed on the base resin powder, wherein inorganic particles may be chemically bound to the crosslinked polymer contained in the surface crosslinked layer, via an oxygen-containing bond or a nitrogen-containing bond.

Polymeric sorbents for reactive gases are provided. More particularly, the polymeric sorbents are a reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The polymeric sorbent has nitrogen-containing groups that are covalently attached to the polymeric sorbent. The nitrogen-containing groups include a primary amino group, a secondary amino group, a tertiary amino group, or a combination thereof. Additionally, methods of sorbing reactive gases on the polymeric sorbents and compositions resulting from the sorption of reactive gases on the polymeric sorbents are provided.

The present invention describes polymer compositions that have enhanced properties as oxygen barriers, as well as manufacturing methods for such oxygen-scavenging polymers and devices composed of such oxygen-scavenging polymers. These oxygen-scavenging polymers offer several benefits over existing materials, including a reduced ability for oxygen and carbon dioxide to permeate the polymer, reduced foaming of beverages stored in containers composed of the polymers, improved moisture absorption, and increased anti-bacterial/anti-fungal properties.

A particle includes a copolymer including a repeating unit A having, in a side chain, a sulfide group or a secondary amine, and three or more hydroxy groups, and a repeating unit B having, in a side chain, at least one reactive functional group for binding a ligand, in which nonspecific adsorption is suppressed.

Thiol-functionalized, hyper-crosslinked vinylbenylchloride-divinybenzene (VBC-DVB) copolymers having high mesopore volumes are provided. Also provided are methods of making the hyper-crosslinked copolymers and methods of using the hyper-crosslinked copolymers in the capture and remediation of metals, including heavy metals.

Provided is a sandbag which is unlikely to break down even when using water-absorbing resin particles therein. A sandbag having a water-permeable bag and water-absorbing resin particles stored in the bag, wherein the pure-water absorption factor of the water-absorbing resin particles is at least a factor of 1,000, and the compression-breaking stress of the water-absorbing resin particles when swollen with pure water is at least 0.1N.

An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.

A method for producing a chromatography medium by: a) exposing a nanoweb sheet having mean flow pore size from 0.1 to 5 m and a porosity from 40 to 90 volume % to a gaseous phase comprising a vinyl monomer to produce a functionalized nanoweb sheet; b) layering a plurality of functionalized nanoweb sheets to form a functionalized nanoweb stack; c) cutting the functionalized nanoweb stack with a die to form die-cut functionalized nanoweb stacks having regular shapes; and d) exposing the die-cut functionalized nanoweb stacks in an aqueous medium to a ligand such as a protein which is capable of forming covalent bonds.

Provided herein are methods of reducing bioburden of (e.g., sterilizing) a chromatography resin that include exposing a container including a composition including a chromatography resin and at least one antioxidant agent and/or chelator to a dose of gamma-irradiation sufficient to reduce the bioburden of the container and the chromatography resin, where the at least one antioxidant agent and/or chelator are present in an amount sufficient to ameliorate the loss of binding capacity of the chromatography resin after/upon exposure to the dose of gamma-irradiation. Also provided are reduced bioburden chromatography columns including the reduced bioburden chromatography resin, compositions including a chromatography resin and at least one chelator and/or antioxidant agent, methods of performing reduced bioburden column chromatography using one of these reduced bioburden chromatography columns, and integrated, closed, and continuous processes for reduced bioburden manufacturing of a purified recombinant protein.