摘要:
Methods of chemically cross-linking antioxidant-stabilized polymeric material are provided. In one example embodiment, peroxide cross-linking can be used to improve wear resistance and the addition of antioxidant can be used to improve oxidation resistance of ultra-high molecular weight polyethylene. A balance between the amounts of peroxide(s) and antioxidant(s) in the polymeric material can ensure that enough cross-linking is achieved for wear reduction and that enough antioxidant is incorporated for improved long-term oxidative stability. In one example embodiment, peroxide(s) can be diffused into a consolidated polymeric material for cross-linking. In another embodiment, polymeric material is consolidated with a vinyl silane, an antioxidant, and a free radical initiator, and the consolidated polymeric material is contacted with water thereby forming an oxidation resistant, cross-linked polymeric material. Such materials can be used in orthopedic applications such as bearing surfaces in total joint implants, including total hips, total knees, total shoulders, and other total joints.
摘要:
Highly concentrated, storage stable aqueous dispersions of a light stabiliser or of a mixture of a light stabiliser with an antioxidant contain more than 47 % by weight active substance, at least one non-ionic crosslinking agent as dispersing agent and a polyglycol as solubiliser, as well as 0.2 to 5 % by weight oleic acid as fluidising agent. Other components may be anionic crosslinking agents and biocides. The claimed dispersions can be easily incorporated into coating masses, such as an aqueous dispersion, an aqueous emulsion or an aqueous solution of a binder based on crosslinkable alkyd resin, acrylic resin, polyester resin or polyurethane resin.
摘要:
This disclosure relates to compositions that includes (a) one or more substituted or unsubstituted cyclic alkenes, and (b) an antioxidant composition including at least one compound of Formula (I). R 1 through R 4 in Formula (I) are described in the specification.
摘要:
A stabilized cyclic alkene composition comprising one or more cyclic alkenes, and at least one antioxidant compound having the formula (I), wherein R1 through R5 can each independently be H, OH, C1-C8 linear, branched, or cyclic alkyl, C1-C8 linear, branched, or cyclic alkoxy or substituted or unsubstituted aryl, and wherein the antioxidant compound is present in an amount between 1 ppm and 200 ppm and has a boiling point lower than 265 °C. A method for forming a layer of carbon-doped silicon oxide on a substrate, which uses the stabilized alkene composition and a silicon containing compound.
摘要:
The invention relates to an oleaginous composition containing an especially antioxidative, flowable active ingredient, as an additive for an oil that is principally used for food preparations, the viscosity of the composition being between the viscosity of the active ingredient and the viscosity of the oil.
摘要:
The invention relates to an antioxidant for an organic material. The invention also relates to the use of the antioxidant for treating an organic material, especially paper, and to a method for treating the same.