H 2 O 2 -Na 2 WO 4体系在相转移催化下通过不饱和(甲基)丙烯酸酯的选择性环氧化合成环氧(甲基)丙烯酸酯。
摘要:
研究了各种经典的环氧化剂对不饱和(甲基)丙烯酸酯的选择性环氧化。结果表明,在相转移催化下,通过使用H 2 O 2(20%)-Na 2 WO 4体系可以得到高选择性和高收率。在这些条件下,严格控制温度和初始pH值可防止在这些选择性环氧化过程中发生聚合。结果表明,环氧化的选择性取决于两个双键亲核性的差异。
Polymeric surface having reduced biomolecule adhesion to thermoplastic articles of such substrate
申请人:SIO2 MEDICAL PRODUCTS, INC.
公开号:US11248100B2
公开(公告)日:2022-02-15
A substrate is described having a treated contact surface comprising a carbon or silicon compound comprising from 1 to 30 atomic percent oxygen, from 0.1 to 30 atomic percent nitrogen, or both, each as measured by XPS. The treated contact surface has a biomolecule recovery percentage greater than the biomolecule recovery percentage of the surface before treatment according to the method.
POLYMERIC SUBSTRATE WITH A SURFACE HAVING REDUCED BIOMOLECULE ADHESION, AND THERMOPLASTIC ARTICLES OF SUCH SUBSTRATE
申请人:SiO2 Medical Products, Inc.
公开号:EP3377565A1
公开(公告)日:2018-09-26
POLYMERIC SURFACE HAVING REDUCED BIOMOLECULE ADHESION TO THERMOPLASTIC ARTICLES OF SUCH SUBSTRATE
申请人:SIO2 MEDICAL PRODUCTS, INC.
公开号:US20180334545A1
公开(公告)日:2018-11-22
A substrate is described having a treated contact surface comprising a carbon or silicon compound comprising from 1 to 30 atomic percent oxygen, from 0.1 to 30 atomic percent nitrogen, or both, each as measured by XPS. The treated contact surface has a biomolecule recovery percentage greater than the biomolecule recovery percentage of the surface before treatment according to the method.
Synthesis of epoxy (meth)acrylic esters by selective epoxidation of unsaturated (meth)acrylic esters using the system H2O2 - Na2WO4 under phase transfer catalysis
作者:Y. Fort、A. Olszewski-Ortar、P. Caubere
DOI:10.1016/s0040-4020(01)90120-6
日期:1992.1
Selective epoxidation of unsaturated (meth)acrylic esters by various classical epoxidizing agents was investigated. It is shown that high selectivity and good yields are obtained by using the system H2O2 (20%) - Na2WO4 under phase transfer catalysis. Under these conditions, the rigorous control of the temperature and of the initial pH allows to prevent polymerization during these selective epoxidations
研究了各种经典的环氧化剂对不饱和(甲基)丙烯酸酯的选择性环氧化。结果表明,在相转移催化下,通过使用H 2 O 2(20%)-Na 2 WO 4体系可以得到高选择性和高收率。在这些条件下,严格控制温度和初始pH值可防止在这些选择性环氧化过程中发生聚合。结果表明,环氧化的选择性取决于两个双键亲核性的差异。