PLANOGRAPHIC PRINTING PLATE MATERIAL, AND CYCLIC UREIDE MOIETY-CONTAINING PHENOLIC RESIN AND ITS SYNTHETIC PROCESS
申请人:MIYOSHI Masaki
公开号:US20090075201A1
公开(公告)日:2009-03-19
Disclosed is a planographic printing plate material comprising an aluminum support and provided thereon, an image formation layer containing a cyclic ureide moiety-containing phenolic resin in which a phenolic resin has a cyclic ureide moiety through a linkage group, the cyclic ureide moiety being derived from a cyclic ureide and the linkage group being derived from a linkage compound having both a monohalogenated alkyl group and one selected from a vinyl group, a carbonyl group, an ester group and a sulfonic acid ester group.
ETHYLENICALLY UNSATURATED COMPOUND, LIGHT SENSITIVE COMPOSITION, LIGHT SENSITIVE PLANOGRAPHIC PRINTING PLATE MATERIAL AND PRINTING PROCESS EMPLOYING THE SAME
申请人:Kuroki Takaaki
公开号:US20090263744A1
公开(公告)日:2009-10-22
The present invention provides a novel ethylenically unsaturated compound which is highly sensitive to scanning exposure due to an ultraviolet to near-infrared laser and is cured to give good physical properties; a light sensitive composition providing good developability and high sensitivity and forming a high strength layer; a planographic printing plate material having advantages that good developability, high sensitivity and high strength layer are obtained, particularly a planographic printing plate material requiring no developing machine which are mounted on a printing press without any development, followed by printing and which provides excellent developability on a printing press and printing durability; and a printing process. The ethylenically unsaturated compound has in the molecule a photo-oxidation group and a polymerizable ethylenically unsaturated bond, and has a predetermined solubility in water or an aqueous alkali solution. The planographic printing plate material is characterized in that it comprises a support and provided thereon, a light sensitive layer containing the ethylenically unsaturated compound, a polyhalogen compound as a photopolymerization initiator, a water-soluble polymer binder as a polymer binder and an infrared absorbing agent.
Alkyl Halides via Visible Light Mediated Dehalogenation
作者:Manjula D. Rathnayake、Jimmie D. Weaver
DOI:10.1021/acs.orglett.9b03848
日期:2019.12.6
Net selective bromination and chlorination of activated C-H bonds can be effected in generally high yield via a simple perhalogenation/dehalogenation sequence. The photochemical reductions require no photocatalyst, relying instead on the formation of an electron donor-acceptor complex of the substrate and reductant, or alternatively autophotocatalysis. Some reactions proceed despite any apparent photon