专利号:US-5541273-A 优先权日:1993-11-12 标 题 :Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl trifluoroacetate/vinyl ester) in the absence of chlorofluorocarbon solvent 发明人:EIAN GILBERT L 权利人:MINNESOTA MINING & MFG 摘要:A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifluoroacetate) (PVTFA) is obtained in essentially quantitative yield under mild conditions by using non-chlorofluorocarbon solvents comprising siloxanes or perfluorinated fluid. Hexamethyl disiloxane is a particularly useful example of such solvents. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient commercial route to syndiotactic polyvinyl alcohol.
专利号:US-9790377-B2 优先权日:2011-09-21 标题:Synthesis of functional fluorinated polyhedral oligomeric silsesquioxane (“F-POSSâ€?) 发明人:HADDAD TIMOTHY S; MABRY JOSEPH M; RAMIREZ SEAN 权利人:US AIR FORCE 摘要:A method of manufacturing a fluorinated polyhedral oligomeric silsesquioxane. The method for manufacture includes opening a single edge of a closed-cage F-POSS and bridging the opened, single edge with a sulfate group. The sulfate group is converted to a disilanol, which is then reacted with a functional dichlorosilane having an organic functional group comprising at least three carbon atoms.
专利号:US-2011009612-A1 优先权日:2007-06-22 标题 :Automated solution-phase iterative synthesis 发明人:POHL NICOLA LUCIA; PARK GISUN 权利人:UNIV IOWA STATE RES FOUND INC 摘要:The first method for iterative solution-phase biomolecule synthesis is described. The method requires only 3 or fewer equivalents of building block at each coupling cycle, and incorporates a FSPE step at the end of each coupling/deprotection sequence to eliminate most byproducts.
专利号:US-7307177-B2 优先权日:2004-12-17 标题:Metallocene complexes, their synthesis and use in catalyst systems for olefin polymerization 发明人:HUANG LEGAL REPRESENTATIVE JIL; CANICH JO ANN M; COKER CATALINA L 权利人:EXXONMOBIL CHEM PATENTS INC 摘要:A metallocene complex is represented by the the formulan n(C p R 5 ) n MX k n nwhere C p (each occurrence) is a cyclopentadienyl group; each of the five R substituents on the or each cyclopentadienyl group is independently selected from hydrogen, C 1 to C 30 substituted or unsubstituted hydrocarbyl, halohydrocarbyl, silylhydrocarbyl or silylhalohydrocarbyl, wherein two adjacent R substituents may be joined to form part of a saturated, partially unsaturated or aromatic monocyclic or polycyclic ring structure, and SiR′ 2 NR″ 2 where each of the two R′ substituents is independently selected from hydrogen, C 1 to C 30 substituted or unsubstituted hydrocarbyl, halohydrocarbyl, silylhydrocarbyl or silylhalohydrocarbyl, wherein two adjacent R′ substituents may be joined to form part of a saturated, partially unsaturated or aromatic monocyclic or polycyclic ring structure, and each of the two R″ substituents is independently selected from C 2 to C 30 substituted or unsubstituted hydrocarbyl, halohydrocarbyl, silylhydrocarbyl or silylhalohydrocarbyl, wherein two adjacent R″ substituents may be joined to form part of a saturated, partially unsaturated or aromatic monocyclic or polycyclic ring structure; n is 1 or 2; M is a metal of valence m from Groups 4 to 11 of the Periodic Table of Elements, k is equal to m minus n and the or each X substituent is a univalent anionic ligand, or two X substituents are joined and bound to the metal atom to form a metallocycle ring, or two X substituents are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand, provided that at least one R substituent on the or one cyclopentadienyl group is SiR′ 2 NR″ 2 , provided that at least one R substituent on at least one C p is SiR′ 2 NR″ 2 and provided that one or the C p may be bridged by a bridging group to another C p group, or a heteroatom containing group, where the bridging group replaces one R group on the C p group(s) or a hydrogen on a heteratom containing group.
摘要:Chciuk, T. V.; Flowers, R. A.; Flowers, R. A., Science of Synthesis Knowledge Updates, (2016) 2, 261. 摘要:Müller, T., Science of Synthesis Knowledge Updates, (2013) 3, 27.