Certain embodiments are described that are directed to lead free compositions including radiation absorption metals in combination with a polymeric material. In some aspects, a composition includes at least one heavy metal, other than lead, known to have shielding capability against ionizing radiation and at least one polymer, polymer blend or co-polymer. Sheets and articles including the compositions are also described.

A polyester composition comprising, based on the total weight of the polyester composition, a first polyester and a second polyester, wherein a weight ratio of the first polyester to the second polyester is 80:20 to 20:80, preferably 60:40 to 40:60; 5 to 60 weight percent (wt %), preferably 5 to 50 wt % of a reinforcing filler; and 5 to 60 wt %, preferably 10 to 50 wt %, more preferably 20 to 50 wt % of an inorganic filler having a specific gravity of greater than 3 grams per cubic centimeter, as determined in accordance with ASTM D792, wherein a molded article comprising the polyester composition has a sound transmission loss of greater than 30 dB, preferably 35 to 50 dB, more preferably 36 to 45 dB, as determined at 1,250 Hz according to ASTM E1050 using a molded disc with a diameter of 100 mm and a thickness of 3.2 mm.

A paint system contains an anti-fouling metal oxide and a fumed silica, wherein the fumed silica has a BET surface area of 150 to 400 m.sup.2/g, a tamped density of 100 to 300 g/l, and a thickening of less than 500 mPas, in which the percentage by weight of silica≤the percentage by weight of the metal and/or oxide thereof, based on the total weight of the paint system. The paint system also contains at least one water-binding organic and/or inorganic filler.

A preparation method comprises following steps: S1: dissolving a coupling agent in an ethanol solution, adding an ultrafine radiopaque agent powder in the ethanol solution, and obtaining a modified ultrafine radiopaque agent powder by agitation, washing and drying, the ultrafine radiopaque agent powder having a particle size of 0.35-0.8 μm; S2: obtaining the radiopaque material by mixing a medical polymeric material with the modified ultrafine radiopaque agent powder. A prepared radiopaque material exhibits not only radiopaque functions but also good mechanical properties of improved elastic modulus, fracture strength and bending modulus, thereby expanding application of medical polymer hollow fibers in high-end medical products for minimally invasive intervention. Particularly, delivery devices applied with prepared radiopaque material have improved pushing and torque performance and are suitable for ultra-smooth guidewires, heart valve prostheses, guiding catheters, and degradable balloons.

Provided are X-ray and metal detectable thermoset composites and methods of detecting the same. The present X-ray and metal detectable thermoset composites may be formed into trays, sheets, or other substrates suitable for use in food or pharmaceutical processing or manufacturing.

A composition and method for spray-applying a two-part, self-setting composition containing a dopant that provides a hazard shielding component and is particularly adapted for delivering the components of the composition at a temperature that promotes their spray application as well as a self-setting reaction. The method includes selecting a self-setting compound that is adapted for curing in place once applied, the self-setting compound including at least one dopant material; and applying the compound to a hazard to be encapsulated such as a radiological, lead, asbestos, or PCB. Alternately, a self-curing compound includes a multi-part compound which, upon a mixing of the parts, chemically reacts and cures, and at least one dopant material dispersed into at least one of the parts, wherein the dopant material is selected for providing radiation shielding upon application of the compound.

The present invention relates to a method of preparing a lead-free radiation shielding sheet with excellent shielding performance not only in a high energy (100 kVp) band but also in a low energy (50 to 80 kVp) band and improved durability of the sheet. bands without containing lead. The radiation shielding sheet of the present invention uses antimony (Sb), which has a high shielding rate even in the low energy band instead of lowering the content of tungsten having a relatively lower shielding rate in the low energy band than in the high energy band, thereby increasing the shielding performance in both high energy (100 kVp) and low energy bands. Further, the radiation shielding sheet of the present invention may increase not only durability, but also elasticity, tearing strength, and tensile strength by mixing additives such as zinc oxide with the rubber.

A composite material including a nanocellulose core and a metal shell is provided. The metal shell covers a surface of the nanocellulose core. The composite material is nanosized and has high mechanical strength. Additionally, a method of manufacturing the composite material is also provided.

Provided are X-ray and metal detectable thermoset composites and methods of detecting the same. The present X-ray and metal detectable thermoset composites may be formed into trays, sheets, or other substrates suitable for use in food or pharmaceutical processing or manufacturing.

This application relates to elastomeric articles such as gloves, compositions for producing the articles and methods for their manufacture. The elastomeric articles contain particles for detectability of the articles (or portions thereof) by metal detectors and/or x-ray detectors. The articles may contain magnetic particles, highly conductive particles, or high atomic mass element-containing particles, and a viscosity modifier to ensure dispersion of the particles throughout the film layer in which the particles are present. The particles may be magnetic particles specifically, and may be coated by a corrosion inhibitor coating.