摘要:
This invention relates to oligomeric bischloroformic acid esters which are obtainable, in a two-phase reaction, from selected cycloaliphatic bisphenols and other bisphenols by introducing phosgene.
摘要:
This invention relates to (co)polymers which contain at least one repeat chain unit of the general formula (1) or (2) and optionally contain repeat units of the general formula (3) in which L1 and L2 mean a photoluminescent residue, wherein the proportion of structural units of the formulae (1) and/or (2) is in each case 0.5 to 100 mol. %, and (3) 0 to 99.5 mol. %, and the molar percentages add up to 100, to the use thereof for the production of electroluminescent devices and to the electroluminescent devices.
摘要:
The present invention relates to (co)polymers which contain at least one repeating structural chain unit of the general formula (1) and/or (2) and optionally repeating units of the general formula (3) ##STR1## in which L.sup.1 and L.sup.2, independently of each other, represent a photoluminescent grouping, a process for their preparation, their use in electroluminescent devices and the electroluminescent devices.
摘要:
Process for the production of hydrogenated, ring-opened metathesis (co)polymers from cyclic olefins using the ruthenium-carbene complexes of the general formula (I) ##STR1## in which R.sub.1 and R.sub.2 mutually independently mean hydrogen, C.sub.2 -C.sub.20 alkenyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbon-yl,C.sub.1 -C.sub.20 alkylthio, which may optionally be substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy or by phenyl optionally substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy;X.sub.1 and X.sub.2 mutually independently mean any desired anionic ligand;L.sub.1 and L.sub.2 mutually independently mean any desired neutral electron donorand two or three of X.sub.1, X.sub.2, L.sub.1 and L.sub.2 may furthermore together form a multi-dentate chelating ligand,as catalysts for the polymerisation stage, wherein the catalyst is optionally modified after polymerisation by adding a modifier and the polymerisation product is hydrogenated as a solution (optionally diluted with the same inert solvent as during polymerisation or with another inert solvent) without addition of an extra hydrogenation catalyst at temperatures of 0.degree. C. to 200.degree. C. preferably of 35.degree. C. to 150.degree. C. under a hydrogen pressure of 2 to 200 bar, preferably of 10 to 50 bar, wherein at least 60%, preferably at least 95% of the olefinic double bonds are saturated.
摘要:
A process for the manufacture of cyclic oligocarbonate is disclosed. The process comprises a reaction of a bis-chlorocarbonic acid ester with isatinbisphenol or with a bis-chlorocarbonic ester thereof. The mixture of cyclic oligocarbonates thus prepared is useful as a precursor in the preparation of modified polycarbonate or polyester resins.