[EN] ISOXAZOLINE DERIVATIVES AND THEIR USES IN AGRICULTURE<br/>[FR] DÉRIVÉS D'ISOXAZOLINE ET LEURS UTILISATIONS EN AGRICULTURE
申请人:DONGGUAN HEC PESTICIDES R&D CO LTD
公开号:WO2020048476A1
公开(公告)日:2020-03-12
Provided are isoxazoline derivatives and uses thereof in agriculture; in particular, provided are a compound having formula (I), a stereoisomer, an N-oxide or a salt thereof, preparation methods thereof, and compositions containing these compounds and uses thereof in agriculture, particularly uses as herbicide active ingredients for controlling unwanted plants; wherein each of R1, R2, R3, R4, n, R5, R6, X and Cy is as described in the invention.
Process for the preparation of halogenated (meth)acrylic esters and poly (meth) arcylates obtained with said (meth)acrylic esters
申请人:Akzo Nobel N.V.
公开号:EP0824096A2
公开(公告)日:1998-02-18
The present invention is directed to a process for the preparation of (meth)acrylates of halogenated alcohols by direct esterification of said alcohols with (meth)acrylic acid (chloride) wherein at least 2,6-substituted pyridine derivative is used as a polymerization inhibitor at room temperature or lower. Suitable at least 2,6-substituted pyridine derivatives are 2,6-lutidine, 2,4,6-collidine or 2,6-di-tert.butyl-4-methyl pyridine.
With the halogenated (meth)acrylate esters prepared with the process according to the invention, very pure homo- and copolymers can be prepared, resulting in polymers having a low optical loss of 0.1 dB/cm or lower at 1300 nm and lower than 0.4 dB/cm at 1550 nm.