Efficient coupling by oxygen accelerated photocatalyzed thiol-alkyne chemistry
作者:Michael L. Allegrezza、Adam M. Thompson、Alex J. Kloster、Dominik Konkolewicz
DOI:10.1016/j.polymer.2018.12.003
日期:2019.1
Thiolreactions have gained attention in many areas of chemical research, such as organic small molecule synthesis, polymer synthesis, and bimolecular coupling due to the “click” chemistry characteristics of this process. This work is a study of a novel method of photochemical thiol-alkyne reactions using alkyl halides and an Ir(ppy)3 photocatalyst. This process is shown to lead to rapid reactions
Polymerizable composition, optical material comprising the composition and method for producing the material
申请人:——
公开号:US20040254258A1
公开(公告)日:2004-12-16
A cured matter obtained by polymerizing and curing a polymerizable composition comprising a compound having at least one episulfide in a molecule is reduced in an odor by adding a perfume to the polymerizable composition comprising the compound having at least one episulfide in a molecule.
A cloudiness of the lens is removed by raising a purity of sulfur to 98% or more.
A reduction in a chlorine content of the sulfur compound described above to 0.1% by weight or less elevates an oxidation resistance and a light fastness of the high refractive index optical material and improves a color tone thereof.
An optical product having a high refractive index and a high-degree transparency is provided by subjecting the composition in advance to deaerating treatment at 0 to 100° C. for one minute to 24 hours under a reduced pressure of 0.001 to 50 torr.
A mercapto compound, a high refractive index resin and lens and a process for preparing them
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0378895A1
公开(公告)日:1990-07-25
A compound with the formula
prepared by reacting
in the presence of a mineral acid, and by hydrolysing the reaction mixture with a base to form the mercapto compound.
A polythiourethane resin can be prepared from this mercapto compound and can be used to make lenses.