CAS: 25249-54-1; Poly[1-(2-Oxo-1-Pyrrolidinyl)-1,2-Ethanediyl]

专利信息

专利号:US-6512081-B1
优先权日:1997-07-21
标题:Synthesis of dithioester chain transfer agents and use of bis(thioacyl) disulfides or dithioesters as chain transfer agents
发明人：RIZZARDO ENZIO; THANG SAN HOA; MOAD GRAEME
权利人:E I DUPONT NEMOURS AND COMPANY; COMMW SCIENT IND RES ORG
摘要:This invention relates to the synthesis of dithiocarboxylic acid esters by reaction of bis(thioacyl) disulphides, thioacetals or vinylidane bis(thioether) with free-radicals (optionally in the presence of monomers). The invention also relates to processes for the synthesis of polymers utilising these dithioesters as polymerisation regulators (chain transfer agents) or to the use of bis(thioacyl) disulphides to generate dithioester chain transfer agents in situ.

专利号:US-9828452-B1
优先权日:2004-11-11
标 题 :Process for the synthesis of poly (vinyl alcohol) and/or poly (vinyl acetate) with spherical morphology and shell-and-nucleus structure and its use in vascular embolization
发明人：COSTA DA SILVA PINTO JOSÉ CARLOS; Niemeyer Limeira Mariana Araújo; SILVA FABRICIO MACHADO; MELO PRIAMO ALBUQUERQUE; DE SOUZA MÃ?RCIO NELE; Lopez Galdêncio Espinosa
权利人:COSTA DA SILVA PINTO JOSÉ CARLOS; Niemeyer Limeira Mariana Araújo; SILVA FABRICIO MACHADO; MELO PRIAMO ALBUQUERQUE; DE SOUZA MÃ?RCIO NELE; Lopez Galdêncio Espinosa; INST ALBERTO LUIZ COIMBRA DE PÓS-GRADUAÇÃO E PESQUISA DE ENGENHARIA—COPPE; FIRST LINE IND E COMMERCIA S/A
摘要:The present invention describes a process for the synthesis of spherical particles of polyvinyl alcohol—PVA and/or polyvinyl acetate—PVAc with shell nucleus structure from total or partial hydrolysis in a caustic aqueous medium with obtaining particulates of PVA/PVAc with controlled spherical morphology, to be used in vascular embolization.

专利号:US-2010304368-A1
优先权日:2006-09-20
标 题:Components and method for enzymatic synthesis of nucleic acids
发明人：CHERKASOV DMITRY; BAEUML ENGLEBERT; BAEUML ELISABETH
权利人:CHERKASOV DMITRY; BAEUML ENGLEBERT; BAEUML ELISABETH
摘要:Novel methods for enzymatic synthesis of nucleic acid chains and the substrates for the same are disclosed. The methods are based on a step-wise enzymatic reaction. The sequencing of nucleic acids is an example of the use of the claimed methods.

专利号:US-4584354-A
优先权日:1981-04-17
标 题:Graft copolymers and the method of their preparation
发明人：HUDECEK SLAVKO; HUDECKOVA IVANA; CEFELIN PAVEL
权利人:CESKOSLOVENSKA AKADEMIE VED OF
摘要:Graft copolymers are formed having a backbone formed by monomeric units, selected from the group of vinyl monomers comprising acrylates, methacrylates, acrylamide, styrene and N-vinyl-2-phyrrolidone, and side branches formed by 10-80 wt. % of oligourethanes based on aliphatic, aromatic and alkylaromatic diisocyanates and low-molecular-weight diols with 2-4 carbon atoms in the molecule. The graft copolymers are prepared in two steps: the first step consists in the synthesis of oligourethane with the terminal unsaturated group; the second step is the radical copolymerization of this oligourethane with the above vinyl monomers.

专利号:WO-2023248242-A1
优先权日:2022-06-23
标题 :A method for synthesis of carbon-silica-metal composite and combination thereof
发明人：P R RAMKUMAR
权利人:P R RAMKUMAR; ANNA UNIV CHENNAI
摘要:The present invention is a facile and template based synthesis method for carbon-5 silica xerogel or carbon-silica aerogel type composites with uniformly distributed metal or metal oxide nanoparticles embedded inside their structure. The method gives high yield with almost all the synthesized metal or metal oxide nanoparticles loaded into the carbon-silica xerogel or carbon-silica aerogel composite structure by in-situ one-pot synthesis procedure. Embedded metal or metal-oxide 10 nanoparticles are three dimensionally covered by carbon coating. This method can also be used to produce carbon-silica xerogel or carbon-silica aerogel composite template based novel hollow granular shell carbon xerogel or hollow granular shell carbon aerogel with highest specific surface area. This method can also be scaled to large amount for various products through one line of synthesis process, 15 showing the potential for industrial scale prospects.

专利号:EP-1669379-B1
优先权日:2003-09-23
标 题 :3,5-dimethyl-1-adamantyl-ammonium polymeric salts and the use thereof in the form of antiviral agents
发明人：MARCHUKOV VALERY ALEKSANDROVIC; PLATONOV VITALY GEORGIEVICH; SELKOV SERGEI ALEKSEEVICH; CHERNOBROVY ALEKSANDR NIKOLAEV
权利人:AKCIJU SABIEDRIBA OLAINFARM
摘要:This invention relates to the polymeric salts of 3.5-dimethyl-1-adamantylammonium and carboxylated (co)polymers, as well as to the use of produced salts as antiviral agents. Object of the invention is the synthesis of new salts of 3.5-dimethyl-1-adamantylammonium and carboxylated (co)polymers, identification of the compounds with antiviral activity and durable action among them. The task is solved by the synthesis of salts of 3.5-dimethyl-1-adamantylammonium and water-soluble carboxylated (co)polymers of a general formula (1): nwhere m and n are mol%, m = 100 - n, nand carboxylated (co)polymers are selected from the group: nvinylaminosuccinic acid, a copolymer of vinyl alcohol and N-vinylaminosuccinic acid, a copolymer of N-vinylpyrrolidone and N-vinylaminosuccinic acid, copolymer of N-vinylpyrrolidone and crotonic acid; copolymer of N-vinylaminosuccinimide and maleic anhydride; copolymer of N-vinylpyrrolidone and maleic anhydride; polyacrylic acid A general synthesis method and synthesis examples are given for each of claimed compounds, as well as the results of identification of toxicity and comparative antiviral activity. Produced compounds are expressly identified by methods of IR analysis, elements analysis, and potentiometric titration, have quite high antiviral activity against the viruses of influenza types A and B, at that they feature durable (prolonged) action which allows using these produced salts not only as antiviral medications for sparing treatment but for prevention of viral diseases.