[EN] AN IMPROVED PROCESS FOR PREPARATION OF TRIFLUOROMETHYLBENZALDEHYDES AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION DE TRIFLUOROMÉTHYLBENZALDÉHYDES ET INTERMÉDIAIRES CORRESPONDANTS
申请人:SRF LTD
公开号:WO2019049173A1
公开(公告)日:2019-03-14
The present invention provides an in-situ process for preparation of a compound of formula 1 and intermediate thereof, These compounds are useful chemical intermediates for the production of pesticides and pharmaceutical products.
Novel trifluoromethyl benzal chlorides and process for the preparation thereof
申请人:OCCIDENTAL CHEMICAL CORPORATION
公开号:EP0077853A1
公开(公告)日:1983-05-04
Novel meta- and para-trifluoromethyl benzal chlorides and ring-halogenated derivatives are useful chemical intermediates for the preparation of meta- and para-trifluoromethyl benzaldehydes and various other useful end products. The novel compounds can be prepared from readily-available xylene starting materials in a process comprising (a) chlorinating meta- or para-xylene, or a ring-halogenated meta- or para-xylene, to form a trichloromethyl benzal chioride product and (B) reacting the trichloromethyl benzal chloride product with about 3 moles or less of anhydrous hydrogen fluoride in the presence of a halogen exchange catalyst.
FLUORINE-BASED SURFACTANT, AND COATING COMPOSITION AND RESIST COMPOSITION EACH USING SAME
申请人:DIC Corporation
公开号:EP2589636A1
公开(公告)日:2013-05-08
Provided is a fluorine-based surfactant including a copolymer synthesized by copolymerizing, as essential monomers, a polymerizable monomer (A) having a poly(perfluoroalkylene ether) chain and polymerizable unsaturated groups at both ends of the chain and a polymerizable monomer (B) having an oxyalkylene group and a polymerizable unsaturated group. The fluorine-based surfactant cannot structurally generate PFOS or PFOA, which tend to accumulate in the environment and living bodies; even when the fluorine-based surfactant has lower fluorine content than surfactants having a fluoroalkyl group having 8 or more carbon atoms, the fluorine-based surfactant has a higher capability of decreasing surface tension than the surfactants. Accordingly, the fluorine-based surfactant can be suitably used as a leveling agent for a coating composition, a resist composition, or the like.