A method of coupling an aromatic compound having a two or more fluorosulfonate substituents to an alkyne is useful in the preparation of polyalkynyl-substituted arene compounds.
将具有两个或两个以上氟磺酸盐取代基的芳香族化合物与炔烃偶联的方法可用于制备多炔烃取代的炔烃化合物。
Thiele; Guenther, Justus Liebigs Annalen der Chemie, 1906, vol. 349, p. 64
作者:Thiele、Guenther
DOI:——
日期:——
POLYURETHANE SPRAYING SYSTEM USED TO MINIMIZE EMISSIONS OF A POLYISOCYANATE
申请人:BASF SE
公开号:US20130119152A1
公开(公告)日:2013-05-16
A polyurethane spraying system minimizes emissions of a polyisocyanate while spraying a mixture of a polyisocyanate and a resin composition onto a surface. The system includes a first reactant supply tank including the resin composition. The system also includes a second reactant supply tank including the polyisocyanate. The system further includes a non-gaseous pump that is coupled with the first and second reactant supply tanks, a mixing apparatus that is coupled with the first and second reactant supply tanks for mixing the resin composition and the polyisocyanate prior to spraying, and a particular spray nozzle that is coupled with the mixing apparatus. The polyurethane spraying system produces less than 50 parts of the polyisocyanate per one billion parts of air according to the NIOSH 5521 Impingement Method while spraying the mixture onto the surface.