Radicicol derivatives, their preparation and their anti-tumour activity
申请人:Sankyo Company Limited
公开号:EP0460950A1
公开(公告)日:1991-12-11
Radiacol derivatives in which one or both hydroxy groups are acylated have valuable anti-tumor activity or may be used as chemical intermediates.
其中一个或两个羟基被酰化的萝卜醇衍生物具有宝贵的抗肿瘤活性,或可用作化学中间体。
SILVER-(CONJUGATED COMPOUND) COMPLEX
申请人:Sumitomo Chemical Co., Ltd
公开号:EP2478981A1
公开(公告)日:2012-07-25
A silver-(conjugated compound) composite comprising silver particles having a number-average Feret diameter of not more than 1,000 nm, and a conjugated compound having a weight-average molecular weight of not less than 3.0×102 adsorbed to the silver particles. The composite exhibits excellent conductivity and charge injection properties, and excellent dispersibility within non-polar solvents
Copolymerization of elemental sulfur to synthesize high sulfur content polymeric materials
申请人:ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
公开号:US11078333B2
公开(公告)日:2021-08-03
Copolymerization of elemental sulfur with functional comonomers afford sulfur copolymers having a high molecular weight and high sulfur content. Nucleophilic activators initiate sulfur polymerizations at relative lower temperatures and in solutions, which enable the use of a wider range of comonomers, such as vinylics, styrenics, and non-homopolymerizing comonomers. Nucleophilic activators promote ring-opening reactions to generate linear polysulfide intermediates that copolymerize with comonomers. Dynamic sulfur-sulfur bonds enable re-processing or melt processing of the sulfur polymer. Chalcogenide-based copolymers have a refractive index of about 1.7-2.6 at a wavelength in a range of about 5000 nm-8μιτι. The sulfur copolymer can be a thermoplastic or a thermoset for use in elastomers, resins, lubricants, coatings, antioxidants, cathode materials for electrochemical cells, dental adhesives/restorations, and polymeric articles such as polymeric films and free-standing substrates. Optical substrates are constructed from the chalcogenide copolymer and are substantially transparent in the visible and infrared spectrum.