[EN] PREPARATION OF DIESTERS OF (METH)ACRYLIC ACID FROM EPOXIDES<br/>[FR] PRÉPARATION DE DIESTERS D'ACIDE (MÉTH)ACRYLIQUE À PARTIR D'ÉPOXYDES
申请人:EVONIK OPERATIONS GMBH
公开号:WO2020035561A1
公开(公告)日:2020-02-20
The application relates to a process for preparing a (meth)acrylic acid diester by reacting a (meth)acrylic acid anhydride with an epoxide in the presence of a catalyst system comprising a first and/or second catalyst in combination with a co-catalyst. The first catalyst is a halide of Mg or a trifluoromethanesulfonate of a rare earth element; the second catalyst is a Cr(lll) salt; and the co- catalyst is a tertiary amine, a quaternary ammonium salt, a tertiary phosphine or a quaternary phosphonium salt.
Compounds of formula R³-CH=CH-CR¹R²-CH₂OCH₂R⁴ wherein R¹ and R² are H, alkyl or together form a cycloalkyl group with the adjacent carbon, R³ is a substituted phenyl group, R⁴ is an optionally substituted phenoxy phenyl group, and compositions contianing them useful as insecticides, and compounds of formula HOCH₂-CR¹R²-CH₂OCH₂R⁴ and OCH-CR¹R²CH₂OCH₂R⁴, useful as intermediates therefor.
A polyetherimide composition comprises the polymerization product of a catalyzed imidization product of a 3-substituted phthalic anhydride and a sulfone diamine having improved melt stability and reduced corrosivity, and a method of manufacture thereof.