employing N-(aryl/alkylthio)succinimides as a thiolating reagent. The reaction involves the generation of an episulfonium ion followed by intramolecular trapping with alkenes, which offers access to diverse thiolated dehydropiperidines in good yield. In addition, the synthesis of dihydropyran and cyclohexene derivatives, as well as the conversion of the arylthiol moiety to useful functional groups, were
A process for coating a substrate with a film comprising an α,β-ethylenically unsaturated compound, a β,γ-unsaturated ether activator compound, an effective amount of a free radical polymerization initiator, and, optionally, a catalytic amount of metal drier. The components are applied to the substrate and the coated substrate is then placed in an atmosphere substantially free of oxygen until the coating has cured to a substantially tack-free condition.
Fugitive acids, such as trifluoroacetic acid or fluorinated pentanediones, stabilize metal driers to provide coating compositions having extended pot life.
逸出酸(如三氟乙酸或氟化戊二酸)可稳定金属干燥剂,从而提供具有更长罐装寿命的涂料组合物。
Allyloxy-activated surface coatings
申请人:Monsanto Company
公开号:EP0296140A2
公开(公告)日:1988-12-21
Metal drier moderated to provide compositions of extended pot life by at least one molybdenum compound. Coating compositions of free radical polymerizable compounds and moderated metal drier exhibit lower propensity to yellowing.