申请人:Covestro Deutschland AG
公开号:US11078218B2
公开(公告)日:2021-08-03
Provided herein is a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kn+ to obtain organoborates of the formula 1/n Kn+R34B−—R1 (IV), where one equivalent of organoboronic ester of the formula B—R1(OR2)(OR3) (I) is initially charged together with 1/n equivalents of salt Kn+ nX− (II) and 3 equivalents of metal M in a solvent or a solvent mixture, 3 equivalents of a haloaromatic R4—Y (III) are added, and optionally a second organic solvent water is added and the compound 1/n Kn+ R24B−—R1 (IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.
本发明提供了一种制备三芳基有机硼酸盐的工艺,该工艺由烷基或环烷基硼酸盐在正价阳离子 1/n Kn+ 的存在下进行,得到式 1/n Kn+R34B--R1 (IV)的有机硼酸盐,其中一当量的式 B-R1(OR2)(OR3)(I)的有机硼酸酯最初与 1/n 当量的盐 Kn+ nX- (II) 和 3 当量的金属 M 一起充入溶剂或溶剂混合物中、加入 3 个当量的卤代芳香族化合物 R4-Y (III),并可选择加入第二种有机溶剂水,然后将化合物 1/n Kn+ R24B--R1 (IV) 与有机相分离,并将这些物质用作光聚合物配方中的共引发剂。