Lubricants are taught that can quickly and easily form a lubricating layer on a metal surface of a metal before plastic processing. Such lubricants preferably include a primary lubricating agent or component having a bridge complex that satisfies the following conditions: (1) the complex contains at least two central metal atoms; (2) at least one first multidentate ligand forms a bridge between two central metal atoms; and (3) at least one second multidentate ligand is bound to at least one central metal atom and has at least one coordinating atom that can coordinate with metal atoms, but which is not coordinated with any of the central metal atoms or is only partially coordinated with at least one of those central metal atoms. A third multidentate ligand is preferably also bound to one of the central metal atoms and may preferably include at least two sulfur atoms that are coordinated to the central metal atom.
(EN) Crosslinked networks of (meth)acrylate (co)polymers, and a method of making the networks, are provided in which a photoiniferter-derived homopolymer, random copolymer or block copolymer is dissolved in a compatible monomer mixture along with a radiation-sensitive photoinitiator and crosslinker. The polymer-monomer mixture is coated onto a suitable web and cured via ultraviolet radiation to yield a crosslinked network resulting from polymerization of monomers along with incorporation of the active photoiniferter polymer. The networks exhibit excellent adhesive properties. When the photoiniferter polymer is a homopolymer, a random copolymer or an AB-type diblock copolymer, a pressure-sensitive adhesive results. When the photoiniferter polymer is a homopolymer or a random copolymer, the resulting adhesive exhibits excellent vibration-damping characteristics. When the photoiniferter polymer is an ABA-type triblock copolymer, a structural adhesive is obtained.(FR) L'invention se rapporte à des réticulations de (co)polymères de (méth)acrylate, et à un procédé de préparation de ces réticulations, selon lequel un homopolymère, un copolymère sans ordre ou un copolymère séquencé dérivé d'un initiateur/agent de transfert/élément de terminaison photochimique (photoiniferter) est dissous dans un mélange monomère compatible avec un articulateur et un photoinitiateur sensibles au rayonnement. Le mélange polymère-monomère est appliqué sur une bande appropriée et durcie par l'intermédiaire d'un rayonnement ultraviolet pour effectuer une réticulation produite par la polymérisation de monomères avec l'incorporation du polymère de photoiniferter actif. Ces réticulations présentent d'excellentes caractéristiques adhésives. Lorsque le polymère de photoiniferter est un homopolymère, un copolymère sans ordre ou un copolymer biséquencé du type AB, l'on obtient un adhésif autocollant lorsque le polymère de photoiniferter est un homopolymère ou un copolymère sans ordre, l'adhésif obtenu présente d'excellentes caractéristiques anti-vibration. Lorsque le polymère de photoiniferter est un copolymère triséquencé du type ABC, l'on obtient une colle d'assemblage.
<i>S</i>-alkyl Dithiocarbamates Synthesis through Electrochemical Multicomponent Reaction of Thiols, Hydrogen Sulfide, and Isocyanides
challenge. In this work, we have successfully developed a multicomponent reaction protocol to convert H2S into S-alkyl dithiocarbamates under constant current conditions. No additional oxidants nor additional catalysts are required, and due to mild conditions, the reactions display a broad substrate scope, including varieties of thiols or disulfides.