CAS: 12236-86-1; Reactive Blue 21

专利信息

专利号:US-7216975-B2
优先权日:2003-07-15
标 题 :Method for preparing the reactive tinting compound and the tinted contact lens
发明人：HONG SHINN-GWO
权利人:HONG SHINN-GWO
摘要:A method for preparing the tinted contact lens with the covalently bonded novel reactive tinting compound is disclosed. The reactive tinting compound with mono vinyl functionality is prepared by reacting the reactive dye with a hydrophilic monomer containing both pendent hydroxyl and vinyl groups under an alkaline condition. The water soluble reactive dyes containing either difluoro-chloropyrimidine or β-sulphatoethylsulphone reactive groups are used for synthesis of the reactive tinting dye. The lens forming materials are photo-polymerized in the presence of the reactive tinting compound to prepare a tinted contact lens. The reactive tinting compound is copolymerized with the lens forming monomers in a single photo-polymerization step that requires no subsequently alkaline soaking or developing step as used in the prior art. In addition, the covalently bonded dye is stable and durable in the lens and does not fade or leach out after multiple high-pressure thermal sterilizations.

专利号:CN-216704254-U
优先权日:2021-12-31
标 题 :Dilution kettle for synthesis of reactive blue 21